Patent Application
20230420798
Embodiments of this application relate to the field of batteries, and more specifically, to a battery, an electric apparatus, and a method and an apparatus for manufacturing battery.
Energy conservation and emission reduction are crucial to the sustainable development of the automobile industry. In this context, electric vehicles, with their advantages in energy conservation and environmental protection, have become an important part of the sustainable development of the automobile industry. For electric vehicles, battery technology is an important factor in connection with their development.
In the development of battery technology, in addition to performance improvement, safety is another non-negligible issue. If the safety of a battery cannot be guaranteed, the battery cannot be used. Therefore, how safety performance of batteries is enhanced is an urgent technical problem that needs to be solved in battery technology.
This application provides a battery, an electric apparatus, and a method and an apparatus for manufacturing battery, so as to enhance safety performance of the battery.
According to a first aspect, a battery is provided. The battery includes a battery cell including a first wall, where the first wall is provided with a pressure relief mechanism, the pressure relief mechanism being configured to be actuated when internal pressure or temperature of the battery cell reaches a threshold, so as to relieve the internal pressure; a firefighting pipe configured to accommodate a firefighting medium, where the firefighting pipe is configured to discharge the firefighting medium when the pressure relief mechanism is actuated; and a fixing member disposed between the first wall and the firefighting pipe, where the fixing member is configured to fix the firefighting pipe. The firefighting pipe includes a first restraint member, and the fixing member includes a second restraint member, where the first restraint member and the second restraint member fit with each other to restrict the firefighting pipe in a first direction and a second direction, the first direction is perpendicular to the first wall, and the second direction is parallel to the first wall and perpendicular to an extending direction of the firefighting pipe.
With the technical solution in this embodiment of this application, the firefighting pipe is disposed in the battery, such that the firefighting medium can be discharged when the pressure relief mechanism of the battery cell is actuated, which cools the emissions of the battery cell and even the inside of the battery cell, enhancing the safety performance of the battery. On this basis, the firefighting pipe is provided with the first restraint member, and the battery is further provided with the fixing member, the fixing member being provided with the second restraint member. The first restraint member and the second restraint member fit with each other to restrict the firefighting pipe in a plurality of directions, so that the firefighting pipe can be stably disposed in the battery and provide reliable firefighting and temperature regulation effects, so as to enhance the safety performance of the battery.
In some possible implementations, the first restraint member is a single-claw structure, the single-claw structure including a connecting portion and a first claw portion, where the connecting portion is formed by a pipe wall of the firefighting pipe extending along the second direction, the first claw portion is connected to the connecting portion and extends toward the battery cell, and the first claw portion is snap-fitted with the second restraint member.
With the technical solution in the implementations, the first restraint member on the firefighting pipe is designed as the single-claw structure and is snap-fitted with the second restraint member on the fixing member, which facilitates provision of the single-claw structure on the firefighting pipe while ensuring stable connection between the first restraint member and the second restraint member, accordingly improving production efficiency of the firefighting pipe.
In some possible implementations, the second restraint member is a slot structure, the slot structure including a first slot wall and a second slot wall arranged in the second direction, where the first slot wall and the second slot wall are configured to clamp the first claw portion to restrict the firefighting pipe in the first direction and the second direction.
With the technical solution in the implementations, the second restraint member on the fixing member is designed as the slot structure that fits with the first claw portion, and the first slot wall and the second slot wall in the slot structure clamp the first claw portion, which can improve snap-fit strength between the first restraint member and the second restraint member, thereby improving restriction and fixing effects of the firefighting pipe in the first direction and the second direction and improving mounting stability of the firefighting pipe in the battery.
In some possible implementations, an end of the first slot wall and/or the second slot wall away from the battery cell is provided with a first protrusion, an end of the first claw portion close to the battery cell is provided with a second protrusion, and the first protrusion and the second protrusion fit with each other to restrict the firefighting pipe in the first direction.
With the technical solution in the implementations, when the first slot wall and/or the second slot wall and the first claw portion are snap-fitted with each other, the second protrusion on the first claw portion is provided toward the battery cell relative to the first protrusion on the first slot wall and/or the second slot wall, so that the first protrusion can prevent the second protrusion and the first claw portion on which the second protrusion is located from leaving the battery cell, thereby further improving the snap-fit strength between the second restraint member and the first restraint member in the first direction, so as to improve the restriction and fixing effects of the firefighting pipe in the first direction.
In some possible implementations, an end of the first protrusion away from the battery cell is provided with a first slope, and an end of the second protrusion close to the battery cell is provided with a second slope, the first slope and the second slope corresponding to each other and each being oblique to a plane perpendicular to the first wall.
With the technical solution in the implementations, on the basis that the first claw portion is provided with the first protrusion and the first slot wall and/or the second slot wall is provided with the second protrusion that fits with the first protrusion, the first protrusion and the second protrusion may each be provided with a slope, and the slopes fit with each other, which can further improve mounting efficiency of the first claw portion between the first slot wall and the second slot wall while ensuring a good snap-fit effect between the first claw portion and the first slot wall and the second slot wall. Therefore, the technical solution in the implementations can improve the mounting efficiency of the firefighting pipe in the battery while ensuring the mounting stability of the firefighting pipe in the battery.
In some possible implementations, the slot structure extends along a third direction, and the first claw portion is able to slide in the slot structure along the third direction, where the third direction is parallel to the first wall and parallel to the extending direction of the firefighting pipe.
With the technical solution in the implementations, the second restraint member of the slot structure extends along the third direction, and thus the slot structure has a certain length in the third direction. The first claw portion in the firefighting pipe can slide in the slot structure along the third direction. During operation of the battery cell, the battery cell swells due to chemical reactions inside the battery cell. When the battery cell swells in the third direction, a position of the fixing member located on the first wall of the battery cell changes, and even a position of the second restraint member on the fixing member changes. Because the first claw portion in the firefighting pipe can slide in the second restraint member of the slot structure along the third direction, even though the swelling of the battery cell causes the position change of the second restraint member, it has little or no effect on the firefighting pipe. Therefore, even if the battery cell swells, the mounting stability of the firefighting pipe in the battery remains high.
In some possible implementations, the first restraint member is a double-claw structure, the double-claw structure including a connecting portion and a first claw portion and a second claw portion arranged in the second direction, where the connecting portion is formed by a pipe wall of the firefighting pipe extending along the second direction, and the first claw portion and the second claw portion are connected to the connecting portion and extend toward the battery cell; and the first claw portion and the second claw portion are configured to clamp the second restraint member to restrict the firefighting pipe in the first direction and the second direction.
With the technical solution in the implementations, the first restraint member of the double-claw structure is provided on the firefighting pipe, and the double-claw structure is used to clamp the second restraint member on the fixing member to mount the firefighting pipe in the battery. Specifically, when the double-claw structure clamps the second restraint member, the double-claw structure can achieve good restriction and fixing effects on the second restraint member in two opposite sub-directions in the second direction, so that the firefighting pipe has high stability in the second direction. In addition, when the double-claw structure clamps the second restraint member, the double-claw structure and the second restraint member can have interaction forces in the first direction, so as to ensure that the firefighting pipe also has certain stability in the first direction.
In some possible implementations, the second restraint member is a snap-fit structure, the snap-fit structure including a first snap-fit portion and a second snap-fit portion arranged in the first direction, where the first snap-fit portion is formed by the fixing member extending along a direction leaving the battery cell, the second snap-fit portion is provided at an end of the first snap-fit portion away from the battery cell, a size of the second snap-fit portion is not smaller than that of the first snap-fit portion in the second direction, and the first claw portion and/or the second claw portion is snap-fitted with the second snap-fit portion.
With the technical solution in the implementations, the second restraint member is designed as the snap-fit structure including the first snap-fit portion and the second snap-fit portion, where the second snap-fit portion is provided toward the firefighting pipe, and the size of the second snap-fit portion in the second direction is not smaller than that of the first snap-fit portion in the second direction. Therefore, the second snap-fit portion with a larger size can easily achieve snap-fit of the second snap-fit portion in the double-claw structure of the firefighting pipe, and improve snap-fit strength of the second snap-fit portion in the double-claw structure.
In some possible implementations, an end of the first claw portion and/or the second claw portion close to the battery cell is provided with a third protrusion; and the second snap-fit portion includes a fourth protrusion protruding in the second direction relative to the first snap-fit portion, and the fourth protrusion and the third protrusion fit with each other to restrict the firefighting pipe in the first direction.
With the technical solution in the implementations, when the first claw portion and/or the second claw portion and the second snap-fit portion are snap-fitted with each other, the fourth protrusion on the second snap-fit portion is provided away from the battery cell relative to the third protrusion on the first claw portion and/or the second claw portion, so that the fourth protrusion can prevent the third protrusion and the first claw portion and/or the second claw portion on which the third protrusion is located from leaving the battery cell, thereby further improving the snap-fit strength between the second restraint member and the first restraint member in the first direction, so as to improve the restriction and fixing effects of the firefighting pipe in the first direction.
In some possible embodiments, an end of the third protrusion close to the battery cell is provided with a third slope, an end of the fourth protrusion away from the battery cell is provided with a fourth slope, and the third slope and the fourth slope correspond to each other and each are oblique to a plane perpendicular to the first wall.
With the technical solution in the implementations, on the basis that the first claw portion and/or the second claw portion is provided with the third protrusion and the second snap-fit portion is provided with the fourth protrusion that fits with the third protrusion, the third protrusion and the fourth protrusion may each be provided with a slope, and the slopes fit with each other, which can further improve mounting efficiency of the second snap-fit portion between the first claw portion and the second claw portion while ensuring a good snap-fit effect between the second snap-fit portion and the first claw portion and the second claw portion, thereby improving the mounting efficiency of the firefighting pipe in the battery while ensuring the mounting stability of the firefighting pipe in the battery.
In some possible implementations, the double-claw structure extends along a third direction, and the second restraint member is able to slide in the double-claw structure along the third direction, where the third direction is parallel to the first wall and parallel to the extending direction of the firefighting pipe.
With the technical solution in the implementations, the first restraint member of the double-claw structure extends along the third direction, and thus the double-claw structure has a certain length in the third direction. The second restraint member on the fixing member can slide in the double-claw structure along the third direction. During operation of the battery cell, the battery cell swells due to chemical reactions inside the battery cell. When the battery cell swells in the third direction, the position of the fixing member located on the first wall of the battery cell changes, and even the position of the second restraint member on the fixing member changes. Because the second restraint member can slide in the double-claw structure along the third direction, even though the swelling of the battery cell causes the position change of the second restraint member, it has little or no effect on the firefighting pipe. Therefore, even if the battery cell swells, the mounting stability of the firefighting pipe in the battery remains high.
In some possible implementations, the first restraint member extends along the third direction, and the first restraint member and the firefighting pipe have a same extending length in the third direction, where the third direction is parallel to the first wall and parallel to the extending direction of the firefighting pipe.
With the technical solution in the implementations, the firefighting pipe can be easily mounted on a plurality of fixing members at different positions via the first restraint members on the firefighting pipe. In an example, in different types of battery cells, sizes of the battery cells in the third direction may change, and therefore positions of fixing members on the different types of battery cells may also change accordingly. In another example, in a plurality of battery cells, fixing members may be disposed on first walls of only some of the battery cells, and positions of the fixing members on the plurality of battery cells may also be adjusted and changed under different application requirements. In the case of the foregoing two examples, with the technical solution in this embodiment of this application, the first restraint member on the firefighting pipe can still be used to fit with the fixing member for mounting. In other words, fixed mounting of the firefighting pipe is not affected by the change in the positions of the fixing members on the plurality of battery cells. With the technical solution in the implementations, the mounting efficiency of the firefighting pipe in the battery can be improved, and the firefighting pipe can be applicable to more application scenarios, facilitating promotion and use of the firefighting pipe in many different types of batteries.
In some possible implementations, the firefighting pipe includes at least one pair of the first restraint members, and each pair of the first restraint members is located on two sides of the firefighting pipe in the second direction, respectively; and the fixing member includes at least one pair of the second restraint members, and each pair of the second restraint members is provided corresponding to each pair of the first restraint members.
With the technical solution in the implementations, the two sides of the firefighting pipe in the second direction are provided with the at least one pair of the first restraint members, where the at least one pair of the first restraint members and the corresponding at least one pair of the second restraint members fit with each other to achieve reliable and stable restriction and fixing of the firefighting pipe in the second direction, thereby improving the mounting stability of the firefighting pipe in the battery.
In some possible implementations, the firefighting pipe includes a first pipe wall and a second pipe wall facing away from each other in the first direction, and the first pipe wall is farther away from the battery cell than the second pipe wall, where thickness of the first pipe wall is greater than that of the second pipe wall, and/or the first pipe wall is provided with a reinforcing member.
With the technical solution in the implementations, in the firefighting pipe, the thickness of the first pipe wall farther away from the battery cell is greater than that of the second pipe wall closer to the battery cell, and/or the first pipe wall is provided with the reinforcing member. Therefore, the first pipe wall farther away from the battery cell may have higher strength and be capable of withstanding an impact caused by an external force on the firefighting pipe to a greater extent, improving the use reliability of the firefighting pipe in the battery.
In some possible implementations, in the second direction, a size of the first pipe wall is greater than that of the second pipe wall.
With the technical solution in the implementations, in the firefighting pipe, the sizes of the first pipe wall and the second pipe wall in the second direction may also be designed to make the first pipe wall stronger than the second pipe wall in strength. To be specific, the first pipe wall may have higher strength and be capable of withstanding the impact caused by the external force on the firefighting pipe to a greater extent, improving the use reliability of the firefighting pipe in the battery. In addition, when the emissions inside the battery cell pass through the pressure relief mechanism and impact the first pipe wall, the second pipe wall may be entirely attached to the first pipe wall. When the first pipe wall and the second pipe wall have a same size, the second pipe wall and the first pipe wall attached to each other block a flow channel, and therefore prevent the firefighting medium in the firefighting pipe from flowing through the corresponding pressure relief mechanism and into the battery cell, affecting the firefighting effect of the firefighting pipe. However, with the technical solution in the implementations, the size of the first pipe wall in the second direction is greater than that of the second pipe wall in the second direction. Therefore, even if the second pipe wall is attached to the first pipe wall, the flow channel is not completely blocked, so that the firefighting medium may flow through the corresponding pressure relief mechanism and into the battery cell, providing a good firefighting effect.
According to a second aspect, an electric apparatus is provided and includes the battery according to the first aspect or any one of the possible implementations of the first aspect, where the battery is configured to supply electric energy to the electric apparatus.
According to a third aspect, a method for manufacturing battery is provided and includes: providing a battery cell, where the battery cell includes a first wall, the first wall being provided with a pressure relief mechanism, and the pressure relief mechanism being configured to be actuated when internal pressure or temperature of the battery cell reaches a threshold, so as to relieve the internal pressure; providing a firefighting pipe, where the firefighting pipe is configured to accommodate a firefighting medium and discharge the firefighting medium when the pressure relief mechanism is actuated; providing a fixing member, where the fixing member is disposed between the first wall and the firefighting pipe; and fixedly mounting the firefighting pipe on the fixing member. The firefighting pipe includes a first restraint member, and the fixing member includes a second restraint member, where the first restraint member and the second restraint member fit with each other to restrict the firefighting pipe in a first direction and a second direction, the first direction is perpendicular to the first wall, and the second direction is parallel to the first wall and perpendicular to an extending direction of the firefighting pipe.
According to a fourth aspect, an apparatus for manufacturing battery is provided and includes: a providing module configured to: provide a battery cell, where the battery cell includes a first wall, the first wall being provided with a pressure relief mechanism, and the pressure relief mechanism being configured to be actuated when internal pressure or temperature of the battery cell reaches a threshold, so as to relieve the internal pressure; provide a firefighting pipe, where the firefighting pipe is configured to accommodate a firefighting medium and discharge the firefighting medium when the pressure relief mechanism is actuated; and provide a fixing member, where the fixing member is disposed between the first wall and the firefighting pipe; and a mounting module configured to fixedly mount the firefighting pipe on the fixing member. The firefighting pipe includes a first restraint member, and the fixing member includes a second restraint member, where the first restraint member and the second restraint member fit with each other to restrict the firefighting pipe in a first direction and a second direction, the first direction is perpendicular to the first wall, and the second direction is parallel to the first wall and perpendicular to an extending direction of the firefighting pipe.
With the technical solution in this embodiment of this application, the firefighting pipe is disposed in the battery, such that the firefighting medium can be discharged when the pressure relief mechanism of the battery cell is actuated, which cools the emissions of the battery cell and even the inside of the battery cell, enhancing the safety performance of the battery. On this basis, the firefighting pipe is provided with the first restraint member, and the battery is further provided with the fixing member, the fixing member being provided with the second restraint member. The first restraint member and the second restraint member fit with each other to restrict the firefighting pipe in a plurality of directions, so that the firefighting pipe can be stably disposed in the battery and provide reliable firefighting and temperature regulation effects, so as to enhance the safety performance of the battery.
To describe the technical solutions of the embodiments of this application more clearly, the following briefly describes the accompanying drawings required for describing the embodiments of this application. Apparently, the accompanying drawings described below show merely some embodiments of this application, and persons of ordinary skill in the art may still derive other drawings from the accompanying drawings without creative efforts.
The accompanying drawings are not drawn to scale.
The following further describes the implementations of this application in detail with reference to the accompanying drawings and embodiments. The detailed description of the following embodiments and the accompanying drawings are intended to exemplarily illustrate the principle of this application, rather than to limit the scope of this application, meaning this application is not limited to the embodiments described herein.
In the description of this application, it should be noted that, unless otherwise stated, “a plurality of” means at least two; and the orientations or positional relationships indicated by the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, and the like are merely for ease and brevity of description of this application rather than indicating or implying that the apparatuses or elements mentioned must have specific orientations or must be constructed or manipulated according to specific orientations. These terms shall therefore not be construed as any limitations on this application. In addition, the terms “first”, “second”, “third”, and the like are merely for the purpose of description and shall not be understood as any indication or implication of relative importance. “Perpendicular” is not perpendicular in the strict sense but within an allowable range of error. “Parallel” is not parallel in the strict sense but within an allowable range of error.
The orientation terms appearing in the following description all are directions shown in the figures, and do not limit the specific structure of the application. In the description of this application, it should also be noted that unless otherwise specified and defined explicitly, the terms “mount”, “connect”, and “join” should be understood in their general senses. For example, they may refer to a fixed connection, a detachable connection, or an integral connection, and may refer to a direct connection or an indirect connection via an intermediate medium. Persons of ordinary skill in the art can understand specific meanings of these terms in this application as appropriate to specific situations.
The term “and/or” in this application is only an associative relationship for describing associated objects, indicating that three relationships may be present. For example, A and/or B may indicate three cases: presence of A; presence of both A and B; and presence of B. In addition, the character “/” in this application generally indicates an “or” relationship between the contextually associated objects.
Unless otherwise defined, all technical and scientific terms used in this application shall have the same meanings as commonly understood by persons skilled in the art to which this application relates. The terms used in the specification of this application are intended to merely describe the specific embodiments rather than to limit this application. The terms “include”, “comprise”, and any variations thereof in the specification and claims of this application as well as the foregoing description of drawings are intended to cover non-exclusive inclusions. In the specification, claims, or accompanying drawings of this application, the terms “first”, “second”, and the like are intended to distinguish between different objects rather than to describe a particular order or a primary-secondary relationship.
Reference to “embodiment” in this application means that specific features, structures, or characteristics described with reference to the embodiment may be included in at least one embodiment of this application. The word “embodiment” appearing in various places in the specification does not necessarily refer to the same embodiment or an independent or alternative embodiment that is exclusive of other embodiments. It is explicitly or implicitly understood by persons skilled in the art that the embodiments described in this application may be combined with other embodiments.
The battery in this application is a physical module that includes one or more battery cells for providing electric energy. For example, the battery mentioned in this application may include a battery module, a battery pack, or the like. A battery typically includes a box configured to enclose one or more battery cells. The box can prevent liquids or other foreign matter from affecting charging or discharging of the battery cell.
Optionally, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, or the like. This is not limited in the embodiments of this application. The battery cell may be cylindrical, flat, cuboid, or of other shapes, which is not limited in the embodiments of this application either. Battery cells are typically categorized into three types depending on their packaging: cylindrical battery cell, prismatic battery cell, and pouch battery cell. The type of battery is not limited in the embodiments of this application either.
The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly relies on migration of metal ions between the positive electrode plate and the negative electrode plate to work. The positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer. The positive electrode active substance layer is coated on a surface of the positive electrode current collector, and a current collector uncoated with the positive electrode active substance layer protrudes from the current collector coated with the positive electrode active substance layer and serves as a positive tab. A lithium-ion battery is used as an example, for which, the positive electrode current collector may be made of aluminum, and the positive electrode active substance may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate oxide, or the like. The negative electrode plate includes a negative electrode current collector and a negative electrode active substance layer. The negative electrode active substance layer is coated on a surface of the negative electrode current collector. A current collector uncoated with the negative electrode active substance layer protrudes from the current collector coated with the negative electrode active substance layer and serves as a negative tab. The negative electrode current collector may be made of copper, and the negative electrode active substance may be carbon, silicon, or the like. To allow a large current to pass through without any fusing, a plurality of positive tabs are provided and stacked together, and a plurality of negative tabs are provided and stacked together. The separator may be made of polypropylene (Polypropylene, PP), polyethylene (Polyethylene, PE), or the like. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of this application are not limited thereto.
For the development of battery technologies, many design factors need to be considered, for example, performance parameters such as energy density, cycle life, discharge capacity, and charge and discharge rate, as well as safety of the battery.
For batteries, safety hazards mainly originate in charging and discharging. Therefore, in order to enhance the safety performance of batteries, a pressure relief mechanism is often provided for battery cells. The pressure relief mechanism is an element or part that is actuated when internal pressure or temperature of the battery cell reaches a predetermined threshold, so as to relieve the internal pressure or temperature. The predetermined threshold may be adjusted according to different design requirements. The predetermined threshold may depend on the material used for one or more of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell. The pressure relief mechanism may employ an element or part sensitive to pressure or temperature such that the pressure relief mechanism is actuated when the internal pressure or temperature of the battery cell reaches the predetermined threshold, thereby forming a channel for relieving the internal pressure or temperature.
“Actuate” mentioned in this application means that the pressure relief mechanism is put into action such that the internal pressure or temperature of the battery cell is relieved. The action that the pressure relief mechanism is put into may include but is not limited to, for example, cracking, tearing, or melting at least part of the pressure relief mechanism. When the pressure relief mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged from the pressure relief mechanism as emissions. In this way, the battery cell can relieve its pressure under controllable pressure or temperature, thereby avoiding more serious potential incidents.
The emissions from the battery cell mentioned in this application include but are not limited to electrolyte, fragments of positive and negative electrode plates and separator because of dissolution or breaking, and high-temperature and high-pressure gases and flames produced by reactions.
The pressure relief mechanism in the battery cell greatly influences the safety of the battery. For example, when the battery cell is short-circuited or overcharged, thermal runaway may be caused inside the battery cell, resulting in a sudden rise in pressure or temperature. In this case, the pressure relief mechanism can be actuated to make the internal pressure and temperature be relieved to the outside, thus preventing the battery cell from exploding and catching fire.
In addition to the pressure relief mechanism provided on the battery cell to guarantee the safety of the battery, a firefighting pipe may also be provided in the box for accommodating the battery cells. The firefighting pipe may accommodate a firefighting medium, and the firefighting medium may be a firefighting liquid, a firefighting gas, or a firefighting solid. Optionally, in some implementations, the firefighting pipe may be disposed corresponding to the pressure relief mechanism in the battery cell. When the pressure relief mechanism is actuated, the emissions discharged from the battery cell damage the wall of the firefighting pipe, causing the firefighting medium to flow out of the firefighting pipe. The firefighting medium can cool the high-temperature emissions from the battery cell and reduce the risk of the emissions, thereby enhancing the safety performance of the battery cells and the battery as a whole.
In some related technologies, a bracket is used to mount the firefighting pipe to the wall on which the pressure relief mechanism in the battery cell is located. For example, a bracket is disposed on the wall on which the pressure relief mechanism in the battery cell is located, and the firefighting pipe is disposed on the bracket and corresponding to the pressure relief mechanism. The bracket has only a simple restraint structure, for example, a groove, which fixes the firefighting pipe limitedly. Therefore, in this technical solution, mounting stability of the firefighting pipe in the battery is not good. When an electric apparatus (for example, an electric vehicle) in which the battery is located is in motion, the firefighting pipe in the battery is affected to some extent. In a case that the mounting stability of the firefighting pipe is not good, the firefighting pipe vibrates and even falls off from the battery cell, which affects the normal use of the firefighting pipe and poses a safety hazard to the battery.
In view of this, this application provides a battery. A firefighting pipe in the battery is provided with a first restraint member, and the battery further includes a fixing member. A second restraint member in the fixing member and the first restraint member on the firefighting pipe can fit with each other to achieve restriction and fixing of the firefighting pipe in a plurality of directions, improving mounting stability of the firefighting pipe in the battery and thereby enhancing safety performance of the battery.
The technical solutions described in the embodiments of this application are applicable to various apparatuses that use batteries, for example, mobile phones, portable devices, notebook computers, electric bicycles, electric toys, electric tools, electric vehicles, ships, and spacecrafts. For example, the spacecrafts include airplanes, rockets, space shuttles, spaceships, and the like.
It should be understood that the technical solutions described in the embodiments of this application are applicable to not only the apparatuses described above but also all apparatuses that use batteries. However, for brevity of description, in the following embodiments, an electric vehicle is used as an example for description.
For example,
To meet different power usage requirements, the battery may include a plurality of battery cells, and the plurality of battery cells may be connected in series, parallel, or series-parallel, where being connected in series-parallel means a combination of series and parallel connections. The battery may also be referred to as a battery pack. Optionally, a plurality of battery cells may be connected in series, parallel, or series-parallel to form a battery module first, and then a plurality of battery modules are connected in series, parallel, or series-parallel to form a battery. In other words, the plurality of battery cells may be directly combined into a battery, or may first be combined into battery modules which are then combined into a battery.
For example,
Optionally, the battery 10 may further include other structures. Details are not described herein. For example, the battery 10 may further include a busbar that is used to implement electrical connection between the plurality of battery cells 20, for example, in a parallel, series, or series-parallel manner. Specifically, the busbar may implement the electrical connection between the battery cells 20 by connecting electrode terminals of the battery cells 20. Further, the busbar may be fixed to the electrode terminals of the battery cells 20 by welding. Electric energy of the plurality of battery cells 20 may be further led out by a conductive mechanism that passes through the box. Optionally, the conductive mechanism may also belong to the busbar.
According to different power requirements, a quantity of the battery cells 20 may be set to any numerical value. The plurality of battery cells 20 may be connected in series, parallel, or series-parallel to achieve large capacity or power. Because the quantity of battery cells 20 included in each battery 10 may be large, for ease of mounting, the battery cells 20 may be arranged in groups, and each group of battery cells 20 forms a battery module. The quantity of the battery cells 20 included in the battery module is not limited, and may be set according to requirements.
As shown in
The battery cell 20 may also include two electrode terminals 214 that may be disposed on the cover plate 212. The cover plate 212 is generally in a shape of a flat plate, and the two electrode terminals 214 are fixed on a flat surface of the cover plate 212. The two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b respectively. Each electrode terminal 214 is correspondingly provided with a connecting member 23 or a current collecting member 23 that is located between the cover plate 212 and the electrode assembly 22 for electrically connecting the electrode assembly 22 and the electrode terminal 214.
As shown in
In the battery cell 20, one or more electrode assemblies 22 may be provided according to actual use requirements. As shown in
In an example, a pressure relief mechanism 213 may further be disposed on a wall of the battery cell 20. The pressure relief mechanism 213 is configured to be actuated when internal pressure or temperature of the battery cell 20 reaches a threshold, so as to relieve the internal pressure or temperature.
Optionally, in another embodiment of this application, the pressure relief mechanism 213 and the electrode terminals 214 are disposed on a same wall of the battery cell 20. For example, as shown in
The pressure relief mechanism 213 and the electrode terminals 214 being disposed on a same wall of the battery cell 20, for example, on the cover plate 212 of the battery cell 20, can facilitate processing and mounting of the pressure relief mechanism 213 and the electrode terminals 214, helping improve production efficiency of the battery 10.
Optionally, in an embodiment of this application, the pressure relief mechanism 213 and the electrode terminals 214 are disposed on different walls of the battery cell 20. For example, the electrode terminals 214 of the battery cell 20 may be disposed on a top wall of the battery cell 20, that is, the cover plate 212. The pressure relief mechanism 213 is disposed on another wall of the battery cell 20 that is different from the top wall. For example, the pressure relief mechanism 213 is disposed on a bottom wall opposite the top wall.
The pressure relief mechanism 213 may be a part of the wall on which it is located, or may be a separate structure from the wall on which it is located and be fixed to the wall on which it is located by, for example, welding. For example, in the embodiment shown in
In addition, the pressure relief mechanism 213 may be various possible pressure relief mechanisms. This is not limited in the embodiments of this application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches the threshold; and/or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to break when the internal pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches the threshold.
As shown in
Specifically, in this embodiment of this application, the first wall 201 of the battery cell 20 may be the cover plate 212 in the embodiment shown in
The first wall 201 is provided with the pressure relief mechanism 213. With reference to the foregoing description, the pressure relief mechanism 213 may be a part of the first wall 201 or a separate structure from the first wall 201. The pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism, a pressure-sensitive pressure relief mechanism, or other types of pressure relief mechanisms. For the technical solution related to the pressure relief mechanism 213, reference may be made to the related descriptions in the foregoing embodiment. Details are not described herein again.
In an example, in this embodiment of this application, the pressure relief mechanism 213 and the electrode terminals 214 may all be disposed on the first wall 201, which can facilitate processing and mounting of the pressure relief mechanism 213 and the electrode terminals 214, helping improve production efficiency of the battery 10. Certainly, in other alternative embodiments, the pressure relief mechanism 213 and the electrode terminals 214 may alternatively be disposed on different walls of the battery cell 20.
Still referring to
Optionally, the firefighting medium in the firefighting pipe 30 may be a cooling medium with low temperature. In addition to providing a better cooling effect when the pressure relief mechanism 213 is actuated, the cooling medium may also cool the battery cell 20 when the pressure relief mechanism 213 is not actuated, to prevent safety problems that are more likely to occur when the temperature of the battery cell 20 is excessively high. Optionally, the firefighting medium may be a firefighting gas, a firefighting liquid, or a firefighting solid. In some implementations, the firefighting medium may circulate to achieve a better cooling effect. As an example rather than a limitation, in this embodiment of this application, the firefighting medium may be water, a mixture of water and ethylene glycol, air, or the like.
As an example rather than a limitation, as shown in
Specifically, still referring to
Optionally, in some implementations, the fixing member 40 may include only the second restraint member 410. The second restraint member 410 may be fixedly disposed on the first wall 201 of the battery cell 20 by mechanical connection such as welding.
Alternatively, in some other implementations, in addition to the second restraint member 410, the fixing member 40 may further include other structural members to facilitate mounting of the fixing member 40 and its second restraint member 410 on the first wall 201. In an example, as shown in
For mutual fitting and connection of the first restraint member 310 and the second restraint member 410, as an example rather than a limitation, in the implementation shown in
Optionally, in addition to the mechanical structure of mutual fitting shown in
With the technical solution in this embodiment of this application, the firefighting pipe 30 is disposed in the battery 10, such that the firefighting medium can be discharged when the pressure relief mechanism 213 of the battery cell 20 is actuated, to cool the emissions of the battery cell 20 and even the inside of the battery cell 20, enhancing the safety performance of the battery 10. On this basis, the firefighting pipe 30 is provided with the first restraint member 310, the battery 10 is further provided with the fixing member 40, the fixing member 40 is provided with the second restraint member 410, and the first restraint member 310 and the second restraint member 410 fit with each other to restrict the firefighting pipe 30 in a plurality of directions, so that the firefighting pipe 30 can be stably disposed in the battery 10 and provide reliable firefighting and temperature regulation effects, so as to enhance the safety performance of the battery 10.
With reference to
With the technical solution in this embodiment of this application, the first restraint member 310 on the firefighting pipe 30 is designed as the single-claw structure and is snap-fitted with the second restraint member 410 on the fixing member 40, which facilitation provision of the single-claw structure on the firefighting pipe 30 while ensuring connection stability between the first restraint member 310 and the second restraint member 410, improving production efficiency of the firefighting pipe 30.
Optionally, as shown in
Optionally, in the first restraint member 310 of the single-claw structure, the connecting portion 311 may be connected to an end of the firefighting pipe 30 away from the battery cell 20. In an example, as shown in
As an example rather than a limitation, as shown in
Alternatively, in other embodiments, the first claw portion 312 and the second restraint member 410 may be snap-fitted with each other in other manners.
As shown in
Specifically, in this embodiment of this application, the second restraint member 410 is the slot structure that fits with the first claw portion 312, and the first slot wall 411 and the second slot wall 412 in the slot structure clamp the first claw portion 312, which can improve snap-fit strength between the first restraint member 310 and the second restraint member 410, thereby improving restriction and fixing effects of the firefighting pipe 30 in the first direction x and the second direction y and improving the mounting stability of the firefighting pipe 30 in the battery 10.
Optionally, to make the first slot wall 411 and the second slot wall 412 have a good clamping effect on the first claw portion 312, a distance between the first slot wall 411 and the second slot wall 412 in the second direction y is adapted to a size of the first claw portion 312 in the second direction y. For example, the distance between the first slot wall 411 and the second slot wall 412 in the second direction y is equal or similar to the size of the first claw portion 312 in the second direction y. In addition, sizes of the first slot wall 411, the second slot wall 412, and the first claw portion 312 in the first direction x may also be the same or similar.
Optionally, in some implementations of this embodiment of this application, the first slot wall 411, the second slot wall 412, and the first claw portion 312 may all be a plate structure. When the slot structure formed by the first slot wall 411 and the second slot wall 412 can firmly clamp the first claw portion 312, the second restraint member 410 of the slot structure can play a role not only directly in reliably and stably restricting and fixing the first claw portion 312 in the second direction y but also in restricting and fixing the first claw portion 312 in the first direction x to some extent through a frictional force.
Alternatively, in some other implementations of this embodiment of this application, to further improve the snap-fit strength between the second restraint member 410 and the first claw portion 312 in the first direction x to improve the restriction and fixing effects of the firefighting pipe 30 in the first direction x, in the second restraint member 410 of the slot structure, an end of the first slot wall 411 and/or the second slot wall 412 away from the battery cell 20 is provided with a first protrusion 4101, an end of the first claw portion 312 close to the battery cell 20 is provided with a second protrusion 3121, and the first protrusion 4101 and the second protrusion 3121 fit with each other to restrict the firefighting pipe 30 in the first direction x.
As an example rather than a limitation, as shown in
It can be understood that in a case that the first slot wall 411 is provided with the first protrusion 4101, the first protrusion 4101 on the first slot wall 411 and the second protrusion 3121 on the first claw portion 312 may also protrude in two opposite sub-directions in the second direction y, respectively. Except that the protruding directions of the first protrusion 4101 and the second protrusion 3121 are opposite to the protruding directions shown in
In addition, it should be noted that in this embodiment of this application, when the first claw portion 312 is mounted between the first slot wall 411 and the second slot wall 412, the first protrusion 4101 and the second protrusion 3121 are designed to be opposite each other, provided that the second protrusion 3121 can be provided toward the battery cell 20 relative to the first protrusion 4101. Therefore, in addition to being provided at the end of the first slot wall 411 and/or the second slot wall 412 away from the battery cell 20, the first protrusion 4101 may alternatively be provided at other positions of the first slot wall 411 and/or the second slot wall 412. In addition to being provided at the end of the first claw portion 312 close to the battery cell 20, the second protrusion 3121 may alternatively be provided at other positions of the first claw portion 312. Specific positions of the first protrusion 4101 and the second protrusion 3121 are not limited in this embodiment of this application.
Optionally, in the implementation shown in
In another embodiment of this application, an end of the second protrusion 3121 on the first claw portion 312 away from the battery cell 20 may be provided with a second slope 3122, and an end of the first protrusion 4101 on the first slot wall 411 and/or the second slot wall 412 close to the battery cell 20 is provided with a second slope 4102, the first slope 3122 and the second slope 4102 corresponding to each other and each being oblique to a plane perpendicular to the first wall 201.
Based on the embodiment shown in
As shown in
Optionally, the second slope 4102 and the first slope 3122 may be parallel to each other to optimize the slidable mounting of the first claw portion 312 between the first slot wall 411 and the second slot wall 412.
With the technical solution in this embodiment of this application, on the basis that the first claw portion 312 is provided with the second protrusion 3121 and the first slot wall 411 and/or the second slot wall 412 is provided with the first protrusion 4101 that fits with the second protrusion 3121, the second protrusion 3121 and the first protrusion 4101 may each be provided with a slope, and the slopes fit with each other, which can further improve mounting efficiency of the first claw portion 312 between the first slot wall 411 and the second slot wall 412 while ensuring a good snap-fit effect between the first claw portion 312 and the first slot wall 411 and the second slot wall 412, thereby improving the mounting efficiency of the firefighting pipe 30 in the battery 10 while ensuring the mounting stability of the firefighting pipe 30 in the battery 10.
Based on the embodiment shown in
As shown in
Specifically, in the second restraint member 410 of the slot structure, the first slot wall 411 and the second slot wall 412 can extend along the third direction z and have a certain length in the third direction z, so that the first claw portion 312 in the firefighting pipe 30 can slide between the first slot wall 411 and the second slot wall 412 along the third direction z.
During operation of the battery cell 20, gas inside the battery cell 20 swells due to chemical reactions inside the battery cell 20, and the battery cell 20 also swells accordingly. When the battery cell 20 swells in the third direction z, the position of the fixing member 40 located on the first wall 201 of the battery cell 20 changes, and even the position of the second restraint member 410 on the fixing member 40 changes. Because the first claw portion 312 in the firefighting pipe 30 can slide in the second restraint member 410 of the slot structure along the third direction z, even though the swelling of the battery cell 20 causes the position change of the second restraint member 410, it has little or no effect on the firefighting pipe 30. Therefore, even if the battery cell 20 swells, the mounting stability of the firefighting pipe 30 in the battery 10 remains high.
Optionally, as shown in
It can be understood that as an example rather than a limitation,
In addition, in the implementation shown in
Still referring to
In addition, in the embodiment shown in
In some implementations, in the third direction z, the first restraint member 310 and the firefighting pipe 30 have a same extending length. With the technical solution in the implementations, the firefighting pipe 30 can be easily mounted on a plurality of fixing members 40 at different positions via the first restraint members 310 on the firefighting pipe 30. In an example, in different types of battery cells 20, sizes of the battery cells 20 in the third direction z may change, and therefore positions of fixing members 40 on the different types of battery cells 20 may also change accordingly. In another example, in a plurality of battery cells 20, fixing members 40 may be disposed on first walls 210 of only some of the battery cells 20, and positions of the fixing members 40 on the plurality of battery cells 20 may also be adjusted and changed under different application requirements. In the case of the foregoing two examples, with the technical solution in this embodiment of this application, the first restraint member 310 on the firefighting pipe 30 can still be used to fit with the fixing member 40 for mounting. In other words, fixed mounting of the firefighting pipe 30 is not affected by the change in the positions of the fixing members 40 on the plurality of battery cells 20. With the technical solution in the implementations, the mounting efficiency of the firefighting pipe 30 in the battery 10 can be improved, and the firefighting pipe 30 can be applicable to more application scenarios, facilitating promotion and use of the firefighting pipe 30 in many different types of batteries 10.
In some other implementations, in the third direction z, an extending length of the first restraint member 310 may alternatively be less than that of the firefighting pipe 30. Specifically, in the third direction z, the extending length of the first restraint member 310 matches that of the second restraint member 410. With the technical solution in the implementations, the mounting of the firefighting pipe 30 in the battery 10 may alternatively be implemented by the first restraint member 310 and the second restraint member 410, reducing overall manufacturing costs of the firefighting pipe 30.
The foregoing describes the technical solutions of the battery 10 provided in some embodiments of this application with reference to
With reference to
Optionally, as shown in
With the technical solution in this embodiment of this application, the first restraint member 310 of the double-claw structure is provided on the firefighting pipe 30, and the double-claw structure is used to clamp the second restraint member 410 on the fixing member 40 to mount the firefighting pipe 30 in the battery 10. Specifically, when the double-claw structure clamps the second restraint member 410, the double-claw structure can achieve good restriction and fixing effects of the second restraint member 410 in two opposite sub-directions in the second direction y, so that the firefighting pipe 30 has high stability in the second direction y. In addition, when the double-claw structure clamps the second restraint member 410, the double-claw structure and the second restraint member 410 can have interaction forces in the first direction x, so as to ensure that the firefighting pipe 30 also has certain stability in the first direction x.
Optionally, in the first restraint member 310 of the double-claw structure, the connecting portion 311 may be connected to an end of the firefighting pipe 30 away from the battery cell 20. In an example, as shown in
Optionally, in the implementation shown in
Based on the embodiment shown in
As shown in
Specifically, in this embodiment of this application, in the fixing member 40, the second restraint member 410 is the snap-fit structure including the first snap-fit portion 413 and the second snap-fit portion 414, the second snap-fit portion 414 is provided toward the firefighting pipe 30 relative to the first snap-fit portion 413, and the size of the second snap-fit portion 414 in the second direction y is not smaller than that of the first snap-fit portion 413 in the second direction y. Therefore, the second snap-fit portion 414 with a larger size can easily achieve snap-fit of the second snap-fit portion 414 in the double-claw structure of the firefighting pipe 30, and improve snap-fit strength of the second snap-fit portion 414 in the double-claw structure.
As an example rather than a limitation, in some implementations, in the first restraint member 310 of the double-claw structure on the firefighting pipe 30, an end of the first claw portion 311 and/or the second claw portion 312 close to the battery cell 20 is provided with a third protrusion 3101; and the second snap-fit portion 414 includes a fourth protrusion 4141 protruding in the second direction y relative to the first snap-fit portion 413, and the fourth protrusion 4141 and the third protrusion 3101 fit with each other to restrict the firefighting pipe 30 in the first direction x. With the technical solution in the implementations, the snap-fit strength between the second snap-fit portion 414 and the double-claw structure in the first direction x can be improved.
For example, in the implementation shown in
In the implementation shown in
It can be understood that in addition to the implementation shown in
In addition, it should be noted that in this embodiment of this application, when the second snap-fit portion 414 is mounted between the first claw portion 312 and the second claw portion 313, the third protrusion 3101 and the fourth protrusion 4141 are designed to be opposite each other, provided that the fourth protrusion 4141 can be provided toward the battery cell 20 relative to the third protrusion 3101. Therefore, in addition to being provided at the end of the second restraint member 410 away from the battery cell 20, the fourth protrusion 4141 may alternatively be provided at other positions of the second restraint member 410. In addition to being provided at the end of the first claw portion 312 and/or the second claw portion 313 close to the battery cell 20, the third protrusion 3101 may alternatively be provided at other positions of the first claw portion 312 and/or the second claw portion 313. Specific positions of the third protrusion 3101 and the fourth protrusion 4141 are not limited in this embodiment of this application.
Optionally, in the implementation shown in
In another embodiment of this application, an end of the third protrusion 3101 close to the battery cell 20 is provided with a third slope 3102, and an end of the fourth protrusion 4141 away from the battery cell 20 is provided with a fourth slope 4142, the third slope 3102 and the fourth slope 4142 corresponding to each other and each being oblique to a plane perpendicular to the first wall 201 of the battery cell 20.
Based on the embodiment shown in
As shown in
Optionally, the third slope 3102 and the fourth slope 4142 may be parallel to each other to optimize the slidable mounting of the second snap-fit portion 414 between the first claw portion 312 and the second claw portion 313.
With the technical solution in this embodiment of this application, on the basis that the first claw portion 312 and/or the second claw portion 313 is provided with the third protrusion 3101 and the second snap-fit portion 414 is provided with the fourth protrusion 4141 that fits with the third protrusion 3101, the third protrusion 3101 and the fourth protrusion 4141 may each be provided with a slope, and the slopes fit with each other, which can further improve mounting efficiency of the second snap-fit portion 414 between the first claw portion 312 and the second claw portion 313 while ensuring a good snap-fit effect between the second snap-fit portion 414 and the first claw portion 312 and the second claw portion 313, thereby improving the mounting efficiency of the firefighting pipe 30 in the battery 10 while ensuring the mounting stability of the firefighting pipe 30 in the battery 10.
Based on the embodiment shown in
As shown in
Specifically, in the first restraint member 310 of the double-claw structure, the first claw portion 312 and the second claw portion 313 can extend along the third direction z and have a certain length in the third direction z, so that the second restraint member 410 on the fixing member 40 can slide between the first claw portion 312 and the second claw portion 313 along the third direction z.
During operation of the battery cell 20, gas inside the battery cell 20 swells due to chemical reactions inside the battery cell 20, and the battery cell 20 also swells accordingly. When the battery cell 20 swells in the third direction z, the position of the fixing member 40 located on the first wall 201 of the battery cell 20 changes, and even the position of the second restraint member 410 on the fixing member 40 changes. Because the second restraint member 410 can slide between the first claw portion 312 and the second claw portion 313 of the first restraint member 310 along the third direction z, even though the swelling of the battery cell 20 causes the position change of the second restraint member 410, it has little or no effect on the firefighting pipe 30. Therefore, even if the battery cell 20 swells, the mounting stability of the firefighting pipe 30 in the battery 10 remains high.
Optionally, as shown in
In addition, for the fixing member 40 in this embodiment of this application, except that the structure of the second restraint member 410 on the fixing member 40 is different from that in the technical solution shown in
Optionally, as an example rather than a limitation, in the implementation shown in
With reference to the foregoing related descriptions of the implementation shown in
With reference to the technical solutions in the embodiments shown in
Optionally, the firefighting pipe 30 may include one pair of the first restraint members 310, the pair of the first restraint members 310 is located on two sides of the firefighting pipe 30 in the second direction y, respectively, and an extending length of the pair of the first restraint members 310 in the third direction z is less than or equal to that of the firefighting pipe 30. In this implementation, the fixing member 40 includes at least one pair of the second restraint members 410, each of the at least one pair of the second restraint members 410 is correspondingly located on two sides of the firefighting pipe 30 in the second direction y, and each pair of the second restraint members 410 is provided corresponding to the pair of the first restraint members 310.
Optionally, the firefighting pipe 30 may include a plurality of pairs of the first restraint members 310, each of the plurality of pairs of the first restraint members 310 is located on two side of the firefighting pipe 30 in the second direction y, respectively, and an extending length of each pair of the first restraint members 310 in the third direction z is less than that of the firefighting pipe 30. In this implementation, the fixing member 40 includes a plurality of pairs of the second restraint members 410, each of the plurality of pairs of the second restraint members 410 is correspondingly located on two sides of the firefighting pipe 30 in the second direction y, and in the third direction z, the plurality of pairs of the second restraint members 410 may be provided in one-to-one correspondence with the plurality of pairs of the first restraint members 310.
With the technical solution in this embodiment of this application, at least one pair of the first restraint members 310 is provided on two sides of the firefighting pipe 30 in the second direction y, and the at least one pair of the first restraint members 310 and the corresponding at least one pair of the second restraint members 410 fit with each other to achieve reliable and stable restriction and fixing of the firefighting pipe 30 in the second direction y, thereby improving the mounting stability of the firefighting pipe 30 in the battery 10.
In addition to the technical solution in the foregoing embodiment of this application, in some other implementations, the first restraint members 310 may alternatively not be provided on two sides of the firefighting pipe 30 in the second direction y, but on a side of the firefighting pipe 30 facing toward the battery cell 20, that is, on a side of the firefighting pipe 30 in the first direction x. Alternatively, the first restraint members 310 may be provided on two sides of the firefighting pipe 30 in the third direction z. Specific positions and the number of the first restraint members 310 on the firefighting pipe 30 are not specifically limited in this embodiment of this application, provided that the first restraint member 310 and the second restraint member 410 on the fixing member 40 can fit with each other to stably mount the firefighting pipe 30 in the battery 10.
In addition, in this application, in addition to the single-claw structure or the double-claw structure described in the foregoing embodiments of this application, the first restraint member 310 may alternatively be a three-claw structure or a structure with more claws, so as to further improve the mounting stability of the firefighting pipe 30 in the battery 10. In this case, for each claw in a multi-claw structure, reference may be made to the related technical solutions in the foregoing embodiments, and for the second restraint member 410 corresponding to the multi-claw structure, reference may also be made to the related technical solutions in the foregoing embodiments. Details are not described herein again.
As shown in
Optionally, as shown in
With the technical solution in this implementation, the number of the fixing members 40 in the battery 10 can be reduced while ensuring the fixing stability of the firefighting pipe 30 in the battery 10, thereby reducing the manufacturing costs of the battery 10.
Optionally, in the implementation shown in
It can be understood that in the battery 10 shown in
It can be further understood that the schematic cross-sectional views in
In the foregoing embodiment of this application, the pipe wall of the firefighting pipe 30 may be a pipe wall having an even thickness, and in this implementation, the firefighting pipe 30 is manufactured in a convenient manner and the manufacturing process is mature.
Optionally, to further improve strength and impact resistance of the firefighting pipe 30 to guarantee firefighting and temperature regulation functions of the firefighting pipe 30 in the battery 10, at least part of the pipe wall of the firefighting pipe 30 can be designed to be thicker.
In some possible implementations, the firefighting pipe 30 includes a first pipe wall 301 and a second pipe wall 302 facing away from each other in the first direction x, and the first pipe wall 301 is farther away from the battery cell 20 than the second pipe wall 302, where thickness of the first pipe wall 301 is greater than that of the second pipe wall 302, and/or the first pipe wall 301 is provided with a reinforcing member 50.
As an example rather than a limitation, in
It should be noted that in other implementations, the firefighting pipe 30 may alternatively be a pipe in other shapes, for example, a circular pipe, a quadrilateral pipe, or a polygonal pipe. In the implementations, the pipe wall of the firefighting pipe 30 may also include the first pipe wall 301 and the second pipe wall 302 facing away from each other in the first direction x, and the first pipe wall 301 and the second pipe wall 302 may be a flat plate structure, a curved plate structure, or in other shapes and structures. Specific shapes and structures of the firefighting pipe 30, the first pipe wall 301, and the second pipe wall 302 are not limited in this embodiment of this application.
With the technical solution in this embodiment of this application, in the firefighting pipe 30, the thickness of the first pipe wall 301 farther away from the battery cell 20 is greater than that of the second pipe wall 302 closer to the battery cell 20. Therefore, the first pipe wall 301 farther away from the battery cell 20 has a greater thickness and higher strength and is capable of withstanding an impact caused by an external force on the firefighting pipe 30 to a greater extent, improving reliability of the firefighting pipe 30 in the battery 10. In addition, when the emissions inside the battery cell 20 are discharged through the pressure relief mechanism 213, the emissions can more easily break through the second pipe wall 302 with a smaller thickness, so that the firefighting medium in the firefighting pipe 30 is discharged to provide a firefighting effect. When the emissions reach the first pipe wall 301 through the second pipe wall 302, the first pipe wall 301 with a greater thickness and higher strength can withstand the impact of the emissions, and the first pipe wall 301 is not easily broken through by the emissions, so that the firefighting medium in the firefighting pipe 30 can be prevented from being discharged from the gap in the first pipe wall 301, which avoids unnecessary waste of the firefighting medium, thereby improving the firefighting effect of the firefighting pipe 30.
Optionally, in the implementation shown in
As shown in
Optionally, the reinforcing member 50 may be a strip structure. In some related technologies, the reinforcing member 50 of the strip structure may also be referred to as a stiffener. Providing the reinforcing member 50 on the first pipe wall 301 can also improve the strength of the first pipe wall 301, so as to improve the impact resistance of the first pipe wall 301, improving use reliability of the firefighting pipe 30 in the battery 10.
As an example rather than a limitation, in the implementation shown in
Optionally, in some implementations, a size of the first reinforcing member in the second direction y and that of the first pipe wall 301 in the second direction y may be similar or the same. Optionally, in some other implementations, as shown in
Similarly, a size of the second reinforcing member in the third direction z and that of the first pipe wall 301 in the third direction z may be similar or the same. The provision of the at least one second reinforcing member can improve the strength of the first pipe wall 301 in the third direction z.
It can be understood that to improve the strength of the first pipe wall 301 to a greater extent, in some other implementations, the first pipe wall 301 may be further provided with the reinforcing member 50 while having a greater thickness. In other words, the firefighting pipe 30 with higher strength can be obtained by combining the solutions in the embodiments shown in
As shown in
As an example rather than a limitation, in the embodiment shown in
With the technical solution in the embodiment shown in
Optionally, in the embodiment shown in
It should be noted that in
An embodiment of this application further provides an electric apparatus, where the electric apparatus may include the battery 10 in the foregoing embodiments, and the battery 10 is configured to supply electric energy to the electric apparatus.
Optionally, the electric apparatus may be a vehicle 1, a ship, or a spacecraft.
The foregoing describes the battery 10 and the electric apparatus in the embodiments of this application; and the following describes a method and an apparatus for manufacturing battery in the embodiments of this application. For those not described in detail, reference may be made to the foregoing embodiments.
S301: Provide a battery cell 20, where the battery cell 20 includes a first wall 201, the first wall 201 being provided with a pressure relief mechanism 213, and the pressure relief mechanism 213 being configured to be actuated when internal pressure or temperature of the battery cell 20 reaches a threshold, so as to relieve the internal pressure.
S302: Provide a firefighting pipe 30, where the firefighting pipe 30 is configured to accommodate a firefighting medium and discharge the firefighting medium when the pressure relief mechanism 213 is actuated.
S303: Provide a fixing member 40, where the fixing member 40 is disposed between the first wall 201 and the firefighting pipe 30.
S304: Fixedly mount the firefighting pipe 30 on the fixing member 40.
The firefighting pipe 30 includes a first restraint member 310, and the fixing member 40 includes a second restraint member 410, where the first restraint member 310 and the second restraint member 410 fit with each other to restrict the firefighting pipe 30 in a first direction x and a second direction y, the first direction x is perpendicular to the first wall 201, and the second direction y is parallel to the first wall 201 and perpendicular to an extending direction of the firefighting pipe 30.
The providing module 401 is configured to provide a battery cell 20, where the battery cell 20 includes a first wall 201, the first wall 201 being provided with a pressure relief mechanism 213, and the pressure relief mechanism 213 being configured to be actuated when internal pressure or temperature of the battery cell 20 reaches a threshold, so as to relieve the internal pressure.
The providing module 401 is further configured to provide a firefighting pipe 30, where the firefighting pipe 30 is configured to accommodate a firefighting medium and discharge the firefighting medium when the pressure relief mechanism 213 is actuated.
The providing module 401 is further configured to provide a fixing member 40, where the fixing member 40 is disposed between the first wall 201 and the firefighting pipe 30.
The mounting module 402 is configured to fixedly mount the firefighting pipe 30 on the fixing member 40.
The firefighting pipe 30 includes a first restraint member 310, and the fixing member 40 includes a second restraint member 410, where the first restraint member 310 and the second restraint member 410 fit with each other to restrict the firefighting pipe 30 in a first direction x and a second direction y, the first direction x is perpendicular to the first wall 201, and the second direction y is parallel to the first wall 201 and perpendicular to an extending direction of the firefighting pipe 30.
Although this application has been described with reference to the preferred embodiments, various modifications to this application and replacements of the components therein with equivalents can be made without departing from the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner. This application is not limited to the specific embodiments disclosed in this specification but includes all technical solutions falling within the scope of the claims.
This application is a continuation of International Application No. PCT/CN2021/134381, filed on Nov. 30, 2021 and entitled “BATTERY, ELECTRIC APPARATUS, AND METHOD AND APPARATUS FOR MANUFACTURING BATTERY”, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2021/134381 | Nov 2021 | US |
| Child | 18466850 | US |
