Patent Application
20240405316
This application claims priority under 35 U.S.C. § 119 (a) to and the benefit of Chinese Patent Application No. 202310652692.7, filed Jun. 5, 2023, the entire disclosure of which is incorporated herein by reference.
The disclosure relates to the field of battery technologies, and in particular, to a battery assembly, a battery module, and an electricity-consumption apparatus.
With people's increasing requirements on energy density of a battery system, it is necessary to mount more battery cells into an irregular battery module. A cylindrical battery cell can better adapt to the irregular battery module and improve the energy density of the battery module, and therefore, the cylindrical battery cell is widely used.
The battery module needs to operate at a relatively appropriate temperature. An optimal operating temperature range of the battery module is 25° C. to 30° C. An excessively high or low temperature will affect operating efficiency of the battery module. When the battery cell in the battery module is in a low temperature environment, the battery cell needs to be heated, so that the battery cell can be charged and discharged efficiently. However, how to uniformly heat the battery cell in the battery module is a current technical problem to be solved.
A battery assembly is provided in the disclosure. The battery assembly includes a battery cell and a heating film. The battery cell is configured to provide energy and has a peripheral side face. The heating film is attached to the peripheral side face of the battery cell for heating the battery cell. The heating film includes a first insulating layer, a heating layer, and a second insulating layer that are sequentially stacked. The first insulating layer is closer to the peripheral side face of the battery cell than the second insulating layer. The heating layer is configured to receive a current to generate heat energy to heat the battery cell.
A battery module is further provided in the disclosure. The battery module includes the multiple battery assemblies provided in the disclosure. The multiple battery assemblies are electrically connected to one another in at least one of series connection or parallel connection.
An electricity-consumption apparatus is further provided in the disclosure. The electricity-consumption apparatus includes an apparatus body and the battery module provided in the disclosure. The battery module is configured to power the apparatus body.
To describe technical solutions in the embodiments of the disclosure more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments. Apparently, the accompanying drawings in the following description merely illustrate some embodiments of the disclosure. Those of ordinary skill in the art may also obtain other accompanying drawings based on these provided herein without creative efforts.
Reference numbers are described as follows:
100—battery assembly, 110—battery cell, 111—peripheral side face, 120—heating film, 121—first insulating layer, 122—heating layer, 1221—heating portion, 1221a—first heating group, 1221b—second heating group, 1222—heating sub-portion, 1223—first lead portion, 1224—second lead portion, 1225—first lead sub-portion, 1226—second lead sub-portion, 1227—third lead sub-portion, 1228—fourth lead sub-portion, 1229—bending sub-portion, 123—second insulating layer, 124—gap, 130—first end face, 140—second end face, 200—battery module, 210—mounting assembly, 211—first mounting member, 2111—first groove, 212—second mounting member, 2121—second groove, 213—first electrical connector, 2131—first electrical connection portion, 2132—first abutting portion, 214—second electrical connector, 2141—second electrical connection portion, 2142—second abutting portion, 300—electricity-consumption apparatus, 310—apparatus body.
Technical solutions in embodiments of the disclosure will be described clearly and completely hereinafter with reference to the accompanying drawings described. Apparently, the described embodiments are merely some rather than all embodiments of the disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the disclosure without creative efforts shall fall within the protection scope of the disclosure.
The terms such as “first” and “second” used in the specification, the claims, and the accompany drawings of the disclosure are used for distinguishing between different objects rather than describing a particular order. In addition, the terms “include”, “comprise”, and “have” as well as variations thereof are intended to cover non-exclusive inclusion. For example, a process, system, product, or apparatus including a series of steps or units is not limited to the listed steps or units, it can optionally include other operations or units that are not listed; alternatively, other operations or units inherent to the process, product, or device can be included either.
The term “embodiment” referred to herein means that a particular feature, structure, or feature described in connection with the embodiment may be contained in at least one embodiment of the disclosure. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it refer an independent or alternative embodiment that is mutually exclusive with other embodiments. It is expressly and implicitly understood by those of ordinary skill in the art that an embodiment described herein may be combined with other embodiments.
An optimal operating temperature range of a battery is 25° C. to 30° C. The battery needs to operate at an appropriate temperature. Excessively high or excessively low temperatures will affect operating efficiency of the battery. When in a low temperature, the battery needs to be heated to maintain a temperature of the battery within a reasonable range. A cylindrical battery cell module typically utilizes a serpentine plate heating film. A serpentine support plate is provided between each two layers of cylindrical battery cells, the heating film is fixed to the support plate, and heat-conducting pads are fixed on both sides of the support plate. The heating film can be heated by a current, and the heat-conducting pads are configured to transfer heat to the cylindrical battery cell. However, the heating film can only heat some regions of the cylindrical battery cell through the support plate and the heat-conducting pads, resulting in non-uniform heating of the cylindrical battery cell and different temperatures across various regions of the cylindrical battery cell. This leads to variations in charging and discharging capabilities of different parts of the cylindrical battery cell, causing some regions of the cylindrical battery cell to overcharge or overdischarge, thereby affecting the cycle life of the cylindrical battery cell and reducing the safety performance of the cylindrical battery cell. In addition, a contact area between the heating film and the cylindrical battery cell through the support plate and the heat-conducting pads is relatively small, resulting in relatively low heating efficiency. Moreover, when the cylindrical battery cell expands due to heating, the heating film will be stretched by the cylindrical battery cell; and when the cylindrical battery cell restores to its original shape, some regions of the heating film do not change with a change of a size of the cylindrical battery cell, causing the heating film to detach from the cylindrical battery cell. Some regions of the heating film not in contact with the cylindrical battery cell are prone to overheat, thereby reducing the safety performance of the cylindrical battery cell.
Referring to
It may be understood that, the heating film 120 is attached to the peripheral side face 111 of the battery cell 110. The heating film 120 covers most regions of the battery cell 110. A contact area between the heating film 120 and the peripheral side face 111 of the battery cell 110 is relatively large. The heating film 120 can transfer heat to the battery cell 110, thereby heating the battery cell 110.
Optionally, the heating layer 122 is configured to receive a current, and generate heat when the current flows through the heating layer 122.
Optionally, the heating layer 122 is formed by a metal wire(s). When a current is applied to the heating layer 122, the current may flow through the metal wire(s) to generate heat, thereby heating the battery cell 110. The metal wire may be, but is not limited to, a copper wire, a nickel wire, an iron wire, a chromium wire, or the like.
It may be understood that, the battery cell 110 may be cylindrical. The peripheral side face of the battery cell 110 may be annular.
In the embodiments of the disclosure, the heating film 120 is arranged around the peripheral side face 111 of the battery cell 110. When a temperature of the battery cell 110 is relatively low, the heating film 120 may heat the battery cell 110. The heating film 120 covers the peripheral side face 111 of the battery cell 110, so that most regions of the battery cell 110 can be covered. The battery cell 110 can be heated uniformly, all the regions of the battery cell 110 have the same temperature and thus the same charging and discharging capability, thereby improving the safety performance of the battery assembly 100, and prolonging the cycle life of the battery assembly 100. In addition, the contact area between the heating film 120 and the battery cell 110 is relatively large, the heating film 120 can directly heat the battery cell 110, and the heating film 120 has a relatively high heating efficiency, thereby improving the heating efficiency of the battery assembly 100. Moreover, the first insulating layer 121, the heating layer 122, and the second insulating layer 123 are stacked on the peripheral side face 111 of the battery cell 110 in sequence. The first insulating layer 121 and the second insulating layer 123 are configured to secure the position of the heating layer 122, preventing the heating layer 122 from shifting and causing a short circuit. When a current is applied to the heating layer 122, the heating layer 122 may generate heat energy to heat the battery cell 110. The heating layer 122 is attached to the battery cell 110 through the first insulating layer 121, so that heat energy generated by the heating layer 122 can be transferred to the battery cell 110 to heat the battery cell 110. The contact area between the first insulating layer 121 and the battery cell 110 is relatively large, so that the heating film 120 has a high heating efficiency. Further, the battery cell 110 can be heated uniformly, ensuring all the regions of the battery cell 110 have the same temperature and thus the same charging and discharging capability, thereby improving the safety performance of the battery assembly 100. Finally, the peripheral side face of the battery cell 110 is annular. The heating film 120 is attached to the peripheral side face of the battery cell 110. If the battery cell 110 expands due to heating and presses against the heating film 120, a pressing force exerted on the heating film 120 can be released along the annular peripheral side face, thereby avoiding the heating film 120 from being broken due to an excessive pressing force on the heating film 120 at corners, and prolonging the service life of the heating film 120. Thus, the heating film 120 is not prone to detach from the cylindrical battery cell 110, thereby avoiding overheating of the heating film 120 and improving the safety performance of the battery assembly 100.
Alternatively, in some embodiments, the heating film 120 is adhered to the peripheral side face 111 of the battery cell 110. The heating film 120 is adhered to the peripheral side face 111 of the battery cell 110 through at least one of a back adhesive, a thermal conductive adhesive, and the like.
In the embodiments of the disclosure, the heating film 120 is adhered to the peripheral side face 111 of the battery cell 110 through a back adhesive, a thermal conductive adhesive, or the like, thereby enhancing the connection between the heating film 120 and the battery cell 110. It is beneficial to further preventing the heating film 120 from detaching from the peripheral side face 111 of the battery cell 110, so that the heating film 120 can heat the battery cell 110. In a case where the heating film 120 is adhered to the peripheral side face 111 of the battery cell 110 through a back adhesive, the back adhesive helps strengthen the adhesion between the heating film 120 and the battery cell 110, reduces a distance between the heating film 120 and the battery cell 110, and helps reduce the size of the battery assembly 100. In a case where the heating film 120 is adhered to the peripheral side face 111 of the battery cell 110 through a thermal conductive adhesive, the thermal conductive adhesive facilitates an increase in a speed of transferring heat from the heating film 120 to the battery cell 110, and an improvement in efficiency of the heating film 120 in heating the battery cell 110.
Alternatively, in some embodiments, a material of the first insulating layer 121 may be, but not limited to, at least one of polyimide, polyethylene terephthalate, epoxy resin, silica gel, and the like.
In the embodiments of the disclosure, in a case where the material of the first insulating layer 121 is polyimide or polyethylene terephthalate, the first insulating layer 121 is relatively soft. The heating film 120 may be formed by bending around the peripheral side face 111 of the battery cell 110, and may be adhered to the peripheral side face 111 of the battery cell 110 through a back adhesive, thereby simplifying an assembly of the battery assembly 100 and helping to reduce the assembly costs of the battery assembly 100. In a case where the first insulating layer 121 is made of epoxy resin or silica gel, the first insulating layer 121 is relatively hard, the heating film 120 is directly formed first, and then is sleeved on the peripheral side face 111 of the battery cell 110. A thermal conductive adhesive is disposed between the heating film 120 and the battery cell 110 to adhere the heating film 120 to the peripheral side face 111 of the battery cell 110, improving the structural strength of the heating film 120.
Alternatively, in some embodiments, the material of the second insulating layer 123 may be, but not limited to, at least one of polyimide, polyethylene terephthalate, epoxy resin, silica gel, and the like.
In the embodiments of the disclosure, in a case where the material of the second insulating layer 123 is polyimide or polyethylene terephthalate, the second insulating layer 123 is relatively soft. The heating film 120 may be formed by bending around the peripheral side face 111 of the battery cell 110, and may be adhered to the peripheral side face 111 of the battery cell 110 through a back adhesive, thereby simplifying an assembly of the battery assembly 100 and helping to reduce the assembly costs of the battery assembly 100. In a case where the second insulating layer 123 is made of epoxy resin or silica gel, the second insulating layer 123 is relatively hard, the heating film 120 is directly formed first, and then is sleeved on the peripheral side face 111 of the battery cell 110. A thermal conductive adhesive is disposed between the heating film 120 and the battery cell 110 to adhere the heating film 120 to the peripheral side face 111 of the battery cell 110, improving the structural strength of the heating film 120.
Alternatively, in some embodiments, the first insulating layer 121 and the second insulating layer 123 are made of the same material. In a case where the first insulating layer 121 and the second insulating layer 123 are made of the same material, the bonding strength between the first insulating layer 121 and the second insulating layer 123 can be improved, thereby improving the ability to secure the heating layer 122.
Alternatively, in some embodiments, the heating layer 122 may be formed on a surface of the first insulating layer 121 facing the second insulating layer 123 through at least one of etching, stamping and blanking, winding, etc. The heating layer 122 may be formed as follows. A metal layer is electroplated on the surface of the first insulating layer 121 facing the second insulating layer 123. The heating layer 122 is then formed on the surface of the first insulating layer 121 facing the second insulating layer 123 through photolithographic etching, thereby helping to improve the processing efficiency of the heating layer 122. In addition, the heating layer 122 may also be disposed on the surface of the first insulating layer 121 facing the second insulating layer 123 through stamping and blanking, which helps to improve structural strength of the heating layer, so that the heating film 120 can stably heat the battery cell 110. Furthermore, the heating layer 122 may be formed by winding a metal wire on the surface of the first insulating layer 121 facing the second insulating layer 123 in a snake-like or curved configuration, and the heating layer 122 is fixed by the first insulating layer 121 and the second insulating layer 123. The heating layer 122 may be formed in a winding manner that is simple and easy to operate, thereby facilitating simplification of a processing technology.
In some embodiments, the heating layer 122 includes a heating portion 1221. The heating portion 1221 includes multiple heating sub-portions 1222. Each of the heating sub-portions 1222 extends in a circumferential direction of the battery cell 110. The multiple heating sub-portions 1222 are arranged at intervals in a height direction of the battery cell 110 and sequentially connected end to end.
It may be understood that, the circumferential direction of the battery cell 110 refers to a direction along the circumference of the battery cell 110.
It may be understood that, an extending direction of the heating sub-portion 1222 intersects the height direction of the battery cell 110. A plane where the heating sub-portion 1222 is located is coaxial with the peripheral side face 111.
It may be understood that the multiple heating sub-portions 1222 may be arranged at intervals in the height direction of the battery cell 110 and sequentially connected end to end as follows. The multiple heating sub-portions 1222 are sequentially connected in a bending manner, and are arranged at intervals in the height direction of the battery cell 110.
In the disclosure, the term “a plurality of” or “multiple” means “two or more”.
It may be understood that, the heating portion 1221 may receive a current. When the current flows through the heating portion 1221, the heating portion 1221 generates heat energy.
Optionally, a material of the heating portion 1221 may be at least one of copper, nickel, iron, chromium, and the like. The material of the heating portion 1221 is conductive. When a current flows through the heating portion 1221, the heating portion 1221 will generate and dissipate heat energy.
Alternatively, in some embodiments, the extending direction of the heating sub-portion 1222 is perpendicular to the height direction of the battery cell 110.
In the embodiments of the disclosure, each of the heating sub-portions 1222 extends in the circumferential direction of the battery cell 110. The multiple heating sub-portions 1222 are arranged at intervals in the height direction of the battery cell 110 and sequentially connected end to end. Thus, when a current is applied to the heating layer 122, the current will flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The multiple heating sub-portions 1222 extend along the peripheral side face 111 of the battery cell 110 and are attached to the peripheral side face 111, so that most regions of the battery cell 110 can be covered, the battery cell 110 can be heated uniformly, and all the regions of the battery cell 110 have the same temperature, avoiding overcharging or overdischarging of the battery cell 110 due to temperature differences across various regions of the battery cell 110, and improving the safety performance of the battery assembly 100. In addition, the multiple heating sub-portions 1222 are connected to the peripheral side face 111 of the battery cell 110 through the first insulating layer 121, thus the contact area between the heating film 120 and the battery cell 110 is relatively large, so that the heating film 120 has high heating efficiency.
In some embodiments, the heating film 120 is formed by bending a rectangular heating film 120 and attaching the rectangular heating film 120 to the peripheral side face 111 of the battery cell 110. In the circumferential direction of the battery cell 110, a gap 124 is defined between two ends of the heating film 120. A central angle α of part of the peripheral side face 111 corresponding to the gap 124 satisfies 0°<α≤15°. Specifically, the central angle α of part of the peripheral side face 111 corresponding to the gap 124 may be, but not limited to, 0.5°, 1.5°, 2°, 3.5°, 4°, 4.5°, 5.5°, 6°, 7°, 7.5°, 8°, 9°, 10°, 11°, 11.2°, 12°, 13°, 14°, 14.5°, 15°, etc.
Optionally, the heating film 120 may be rectangular or square.
In the embodiments, the heating film 120 in an unwound state is adhered to the peripheral side face 111 of the battery cell 110 in the circumferential direction of the battery cell 110, so that most regions of the battery cell 110 are covered. Thus, the battery cell 110 can be heated uniformly, and all the regions of the battery cell 110 have the same temperature, thereby avoiding overcharging or overdischarging of the battery cell 110 due to temperature differences across the regions of the battery cell 110, and improving the safety performance of the battery assembly 100. The heating film 120 is assembled to the battery cell 110 in a simple manner, which is convenient to operate, and is beneficial to improving the assembly and disassembly efficiency of the heating film 120. In addition, the central angle a of part of the peripheral side face 111 corresponding to the gap 124 satisfies 0°<α≤15°, so that the heating film 120 can cover most regions of the peripheral side face 111 of the battery cell 110, and a waste of the heating film 120 caused by the excessive winding of the heating film 120 on the battery cell 110 can be avoided. If the central angle α of part of the peripheral side face 111 corresponding to the gap 124 is greater than 15°, the gap 124 is relatively large, thus a relatively large part of the peripheral side face 111 of the battery cell 110 is not covered by the heating film 120, causing non-uniform heating of the battery cell 110 and posing a safety risk.
Referring to
It may be understood that, in the embodiments of the disclosure, one of two opposite ends of the heating portion 1221 is electrically connected to the first lead portion 1223, and the other of the two opposite ends of the heating portion 1221 is electrically connected to the second lead portion 1224.
Alternatively, in the embodiment illustrated in
In the embodiments of the disclosure, the first lead portion 1223 is electrically connected to one end of the heating portion 1221, the first lead portion 1223 is configured to be electrically connected to an external power supply to transfer a current to the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The second lead portion 1224 is electrically connected to another end of the heating portion 1221 away from the first lead portion 1223. The second lead portion 1224 is configured to be electrically connected to an external power supply to transfer a current to the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The first lead portion 1223 is spaced apart from the second lead portion 1224, so that when the first lead portion 1223 and the second lead portion 1224 are electrically connected to the external power supply(ies) without wire entanglement, thereby improving the safety performance of the battery assembly 100.
In some embodiments, the battery assembly 100 further has a first end face 130 and a second end face 140. The first end face 130 is located at one of two opposite ends of the battery cell 110 and is connected to the battery cell 110, and the second end face 140 is located at the other of the two opposite ends of the battery cell 110 and is connected to the battery cell 110. The first lead portion 1223 is arranged close to the first end face 130, and the second lead portion 1224 is arranged close to the second end face 140.
In the embodiments of the disclosure, the first lead portion 1223 is arranged close to the first end face 130 and the second lead portion 1224 is arranged close to the second end face 140, the first lead portion 1223 and the second lead portion 1224 are arranged close to different end faces of the battery cell 110. The first lead portion 1223 and the second lead portion 1224 are configured to be electrically connected to the external power supply(ies) to transfer a current to the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The first lead portion 1223 and the second lead portion 1224 are arranged close to different end faces of the battery cell 110, respectively, thus the first lead portion 1223 and the second lead portion 1224 are far away from each other. When the first lead portion 1223 and the second lead portion 1224 are electrically connected to an external power supply(ies), wire entanglement can be avoided, thereby improving power supply stability of the external power supply to the heating film 120 of the battery cell 110.
In some embodiments, the battery assembly 100 further has the first end face 130 and the second end face 140. The first end face 130 is located at one of the two opposite ends of the battery cell 110 and is connected to the battery cell 110, and the second end face 140 is located at the other of the two opposite ends of the battery cell 110 and is connected to the battery cell 110. The first lead portion 1223 includes a first lead sub-portion 1225 and a second lead sub-portion 1226 that is connected to the first lead sub-portion 1225 in a bending manner. One end of the first lead sub-portion 1225 away from the second lead sub-portion 1226 is electrically connected to the heating portion 1221, the first lead sub-portion 1225 is arranged on the peripheral side face 111, and the second lead sub-portion 1226 is connected to the first lead sub-portion 1225 in a bending manner, and is attached to the first end face 130.
In the embodiments of the disclosure, the first lead portion 1223 is disposed close to the first end face 130, the first lead sub-portion 1225 is connected to the second lead sub-portion 1226 in a bending manner. One end of the first lead sub-portion 1225 away from the second lead sub-portion 1226 is electrically connected to the heating portion 1221 and is disposed on the peripheral side face 111. The first lead sub-portion 1225 is configured to be electrically connected to an external power supply and transfer a current to the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The second lead sub-portion 1226 is disposed on the first end face 130 and configured to secure a position of the first lead sub-portion 1225. As the usage time increases, the battery cell 110 will expand due to heating to press against the multiple heating sub-portions 1222 and the first lead sub-portion 1225. When the battery cell 110 restores to its original shape, a gap will generate between the peripheral side face 111 and a combination of the multiple heating sub-portions 1222 and the first lead sub-portion 1225, resulting in that the first lead sub-portion 1225 is prone to detach from the peripheral side face 111. With the aid of the second lead sub-portion 1226, the position of the first lead sub-portion 1225 can be limited by the second lead sub-portion 1226, thereby preventing the first lead sub-portion 1225 from being scratched to detach from the peripheral side face 111. As a result, the first lead sub-portion 1225 can be firmly adhered to the peripheral side face 111 of the battery cell 110, the power supply stability of an external power supply to the heating film 120 of the battery cell 110 can be improved, and the attachment effect of the heating film 120 to the peripheral side face 111 of the battery cell 110 can be improved, thereby achieving efficient heating of the battery cell 110. The heating film 120 provided in the disclosure is not prone to detach from the cylindrical battery cell 110, thereby avoiding overheating of the heating film 120, and improving the safety performance of the battery assembly 100.
In some embodiments, the battery assembly 100 further has the first end face 130 and the second end face 140. The first end face 130 is located at one of the two opposite ends of the battery cell 110 and is connected to the battery cell 110, and the second end face 140 are located at the other of the two opposite ends of the battery cell 110 and is connected to the battery cell 110. The second lead portion 1224 includes a third lead sub-portion 1227 and a fourth lead sub-portion 1228 that is connected to the third lead sub-portion 1227 in a bending manner. One end of the third lead sub-portion 1227 away from the fourth lead sub-portion 1228 is electrically connected to the heating portion 1221, the third lead sub-portion 1227 is arranged on the peripheral side face 111, and the fourth lead sub-portion 1228 is connected to the third lead sub-portion 1227 in a bending manner, and is attached to the second end face 140.
In the embodiments of the disclosure, the second lead portion 1224 is disposed close to the second end face 140. The third lead sub-portion 1227 is connected to the fourth lead sub-portion 1228 in a bending manner. One end of the third lead sub-portion 1227 away from the fourth lead sub-portion 1228 is electrically connected to the heating portion 1221 and is disposed on the peripheral side face 111. When the third lead sub-portion 1227 is electrically connected to an external power supply, the third lead sub-portion 1227 is configured to transfer a current the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The fourth lead sub-portion 1228 is disposed on the second end face 140 and configured to secure a position of the third lead sub-portion 1227. As the usage time increases, the battery cell 110 will expand due to heating to press against the multiple heating sub-portions 1222 and the third lead sub-portion 1227. When the battery cell 110 restores to its original shape, a gap will generate between the peripheral side face 111 and a combination of the multiple heating sub-portions 1222 and the third lead sub-portion 1227, resulting in that the third lead sub-portion 1227 is prone to detach from the peripheral side face 111. With the aid of the fourth lead sub-portion 1228, the location of the third lead sub-portion 1227 can be limited by the fourth lead sub-portion 1228, thereby preventing the third lead sub-portion 1227 from being scratched to detach from the peripheral side face 111. As a result, the third lead sub-portion 1227 can be firmly adhered to the peripheral side face 111 of the battery cell 110, the power supply stability of an external power supply to the heating film 120 of the battery cell 110 can be improved, and the attachment effect of the heating film 120 to the peripheral side face 111 of the battery cell 110 can be improved, thereby achieving effective heating of the battery cell 110. The heating film 120 provided in the disclosure is not prone to detach from the cylindrical battery cell 110, thereby avoiding overheating of the heating film 120, and improving the safety performance of the battery assembly 100.
Alternatively, referring to
In the embodiments of the disclosure, the first lead portion 1223 and the second lead portion 1224 are both arranged close to one of the first end face 130 and the second end face 140. Thus, the first lead portion 1223 and the second lead portion 1224 are close to the same end face of the battery cell 110. The first lead portion 1223 and the second lead portion 1224 can be electrically connected to an external power supply(ies) to transfer a current to the heating portion 1221, so that the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The first lead portion 1223 and the second lead portion 1224 are both arranged close to the same end face of the battery cell 110, thus the first lead portion 1223 is close to the second lead portion 1224. In a case where the first lead portion 1223 and the second lead portion 1224 are electrically connected to an external power supply(ies), it is advantageous to avoid complex wire entanglement and improve power supply stability of the external power supply to the heating film 120 of the battery cell 110.
Alternatively, in an embodiment illustrated in
In the embodiments, the first lead portion 1223 is disposed at one of the two opposite ends of the heating film 120, and the second lead portion 1224 is disposed at the other of the two opposite ends of the heating film 120. That is, the first lead portion 1223 is disposed close to the first end face 130, and the second lead portion 1224 is disposed close to the second end face 140. In the embodiments, the multiple bending sub-portions 1229 bend and are connected to the multiple heating sub-portions 1222, respectively, so that the heating sub-portions 1222 can receive a current to heat the battery cell 110. In addition, the heating sub-portion 1222 extends along the peripheral side face 111 of the battery cell 110 and is closely attached to the peripheral side face 111, which is beneficial to increasing a contact area between the heating sub-portion 1222 and the battery cell 110. Thus, heat dissipated by the heating sub-portion 1222 can be transferred to the battery cell 110 through the first insulating layer 121, the battery cell 110 can be uniformly heated, all the regions of the battery cell 110 can have the same temperature and thus the same charging and discharging capability, thereby improving the safety performance of the battery assembly 100.
In an embodiment illustrated in
In the embodiments, the first lead portion 1223 and the second lead portion 1224 are arranged on the same side of the heating film 120. That is, both the first lead portion 1223 and the second lead portion 1224 are disposed close to the first end face 130, or both the first lead portion 1223 and the second lead portion 1224 are disposed close to the second end face 140. The first heating group 1221a is spaced apart from the second heating group 1221b in the direction perpendicular to the height direction of the battery cell 110. The heating sub-portion 1222 of the first heating group 1221a farther away from the first lead portion 1223 is connected to the heating sub-portion 1222 of the second heating group 1221b farther away from the first lead portion 1223, so that a connection between the first heating group 1221a and the second heating group 1221b can be achieved, which enables the heating sub-portion 1222 to receive a current and heat the battery cell 110. In addition, each heating sub-portion 1222 extends along the peripheral side face 111 of the battery cell 110 and is closely attached to the peripheral side face 111, which is beneficial to increasing the contact area between the heating sub-portion 1222 and the battery cell 110, so that heat dissipated by the heating sub-portion 1222 can be transferred to the battery cell 110 through the first insulating layer 121, the battery cell 110 can be uniformly heated, and all the regions of the battery cell 110 have the same temperature and thus the same charging and discharging capability, thereby improving the safety performance of the battery assembly 100.
In some embodiments, the first lead portion 1223 is exposed from the second insulating layer 123, and the second lead portion 1224 is exposed from the second insulating layer 123.
It may be understood that, two opposite surfaces of the first lead portion 1223 are both not covered by the second insulating layer 123. Two opposite surfaces of the second lead portion 1224 are both not covered by the second insulating layer 123.
In the embodiments of the disclosure, the first lead portion 1223 is exposed from the second insulating layer 123, so that the first lead portion 1223 can be electrically connected to an external power supply to transfer a current to the heating portion 1221, the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110. The second lead portion 1224 is exposed from the second insulating layer 123, so that the second lead portion 1224 can be electrically connected to an external power supply to transfer a current to the heating portion 1221, the current can flow through the multiple heating sub-portions 1222, and the multiple heating sub-portions 1222 can generate heat energy to heat the battery cell 110.
It may be understood that, the first lead portion 1223 includes the first lead sub-portion 1225 and the second lead sub-portion 1226 that is connected to the first lead sub-portion 1225 in a bending manner. One end of the first lead sub-portion 1225 away from the second lead sub-portion 1226 is electrically connected to the heating portion 1221. The first lead sub-portion 1225 is disposed on the peripheral side face 111, and thus a surface of the first lead sub-portion 1225 facing the second insulating layer 123 is exposed from the second insulating layer 123. In the embodiments of the disclosure, the first lead sub-portion 1225 may be electrically connected to an external power supply to transfer a current to the heating portion 1221, thereby achieving the heating of the battery cell 110.
It may be understood that the second lead portion 1224 includes the third lead sub-portion 1227 and the fourth lead sub-portion 1228 connected to the third lead sub-portion 1227 in a bending manner. One end of the third lead sub-portion 1227 away from the fourth lead sub-portion 1228 is electrically connected to the heating portion 1221. The third lead sub-portion 1227 is disposed on the peripheral side face 111, and thus a surface of the third lead sub-portion 1227 facing the second insulating layer 123 is exposed from the second insulating layer 123. In the embodiments of the disclosure, third lead sub-portion 1227 may be electrically connected to an external power supply to transfer a current to the heating portion 1221, thereby achieving the heating of the battery cell 110.
Referring to
Optionally, the multiple battery assemblies 100 may be electrically connected to one another in one of series connection, parallel connection, and series-parallel connection.
In the embodiments of the disclosure, the battery module 200 includes multiple battery assemblies 100. The multiple battery assemblies 100 are electrically connected to one another in one of series connection, parallel connection, series-parallel connection, and the like. The heating film 120 in each battery assembly 100 has a large contact area with the battery cell 110. The heating film 120 has a high heating efficiency, the battery cell 110 can be heated uniformly, and all the regions of the battery cell 110 can have the same temperature. Thus, the battery assembly 100 can have high safety performance, so that the battery module 200 has high safety performance and high heating efficiency.
In some embodiments, the battery module 200 further includes a mounting assembly 210. The mounting assembly 210 includes a first mounting member 211 and a second mounting member 212 spaced apart from the first mounting member 211. The first mounting member 211 and the second mounting member 212 are both configured to fix the multiple battery assemblies 100. The multiple battery assemblies 100 are arranged in an array between the first mounting member 211 and the second mounting member 212.
In the embodiments of the disclosure, the first mounting member 211 faces the second mounting member 212. The battery assemblies 100 are arranged in an array between the first mounting member 211 and the second mounting member 212. In other words, the first mounting member 211 and the second mounting member 212 are disposed at two opposite ends of the multiple battery assemblies 100, respectively. The first mounting member 211 and the second mounting member 212 are configured to fix the multiple battery assemblies 100 and arrange the multiple battery assemblies 100 in an array, thereby improving the energy density of the battery module 200. In addition, each of the multiple battery assemblies 100 includes the heating film 120. By arranging the multiple battery assemblies 100 in an array between the first mounting member 211 and the second mounting member 212, the assembly of the battery module 200 can be simplified because each battery assembly 100 only needs to be support and placed between the first mounting member 211 and the second mounting member 212.
Referring to
It may be understood that, in the height direction of the battery cell 110, one of the first grooves 2111 is disposed to face one of the second grooves 2121 for fixing one of the battery assemblies 100.
In the embodiments of the disclosure, the multiple first grooves 2111 arranged in an array and the multiple second grooves 2121 arranged in an array are disposed in one-to-one correspondence, thereby securing one of two opposite ends of each of the multiple battery assemblies 100 to one of the first grooves 2111 and securing the other of the two opposite ends of each of the multiple battery assemblies 100 to one of the second groove 2121. The first grooves 2111 and the second grooves 2121 cooperate to define an accommodation space for the battery assemblies 100, so that one of the two opposite ends of each of the battery assemblies 100 can be accommodated in one of the first grooves 2111, and the other of the two opposite ends of each of the battery assemblies 100 can be accommodated in one of the second grooves 2121, and the first grooves 2111 and the second grooves 2121 are in one-to-one correspondence, thereby improving stability and regularity of arrangement of the battery assemblies 100 in the battery module 200, and facilitating improvement of the energy density of the battery module 200. The first grooves 2111 and the second grooves 2121 cooperate to limit the two opposite ends of the battery assemblies 100. The battery assemblies 100 are assembled with the mounting assembly 210, part of a surface of the heating film 120 away from the battery cell 110 abuts against an inner wall of the first groove 2111, another part of the surface of the heating film 120 away from the battery cell 110s abuts against an inner wall of the second groove 2121. With the aid of the first groove 2111 and the second groove 2121, the heating film 120 can be prevented from detaching from the peripheral side face 111 of the battery cell 110, thereby avoiding overheating of the heating film 120 and improving the safety performance of the battery assembly 100.
In some embodiments, the mounting assembly 210 further includes multiple first electrical connectors 213 and multiple second electrical connectors 214. Each of the multiple first electrical connectors 213 is disposed in one of the multiple first grooves 2111 and is configured to be electrically connected to the heating film 120. Each of the multiple second electrical connectors 214 is disposed in one of the second grooves 2121 and is configured to be electrically connected to one end of the heating film 120 away from the first electrical connector 213.
In the embodiments of the disclosure, the battery assembly 100 is secured to the first groove 2111 and the second groove 2121, the first electrical connector 213 in the first groove 2111 is electrically connected to the heating film 120 of the battery assembly 100, and the second electrical connector 214 in the second groove 2121 is electrically connected to the heating film 120 of the battery assembly 100, so that a current can be transferred to the heating film 120, thereby achieving heating of the heating film 120 and eventually achieving heating of the battery cell 110.
It may be understood that, each of the first electrical connectors 213 is disposed in one of the first grooves 2111 and is electrically connected to the first lead sub-portion 1225 to transfer a current to the heating portion 1221. Each of the second electrical connectors 214 is disposed in one of the second grooves 2121 and is electrically connected to the third lead sub-portion 1227 to transfer a current to the heating portion 1221.
In the embodiments of the disclosure, the battery assembly 100 is secured to the first groove 2111 and the second groove 2121, the first electrical connector 213 in the first groove 2111 is electrically connected to the first lead sub-portion 1225 to transfer a current to the first lead sub-portion 1225, so that the current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving heating of the battery cell 110. The second electrical connector 214 in the second groove 2121 is electrically connected to the third lead sub-portion 1227 to transfer a current to the third lead sub-portion 1227, so that the current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving heating of the battery cell 110.
Referring to
It may be understood that, the first abutting portion 2132 protrudes from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111. That is, the first abutting portion 2132 is disposed on the first electrical connection portion 2131 and faces the interior of the first groove 2111.
In the embodiments of the disclosure, the first abutting portion 2132 protrudes from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111. The battery assembly 100 is secured to the first groove 2111, the first abutting portion 2132 in the first groove 2111 is electrically connected to the first lead sub-portion 1225 of the battery assembly 100 to transfer a current to the first lead sub-portion 1225, so that the current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving heating of the battery cell 110. Compared with a case where the first electrical connection portion 2131 is electrically connected to the first lead sub-portion 1225 directly, the first abutting portion 2132 protrudes from the first electrical connection portion 2131, which enables the first electrical connector 213 to better abut against the battery assembly 100 and enables the first abutting portion 2132 to be better electrically connected to the first lead sub-portion 1225, so that the heating film 120 can better heat the battery cell 110. In addition, when the battery cell 110 expands, the first abutting portion 2132 can abut against the first lead sub-portion 1225 more tightly, which is beneficial to improving stability of electrical connection between the first electrical connector 213 and the battery assembly 100, thereby enabling the heating film 120 to better heat the battery cell 110.
Alternatively, in some embodiments, the first abutting portion 2132 protrudes from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111. The first abutting portion 2132 is provided with a smooth structure on a side of the first abutting portion 2132 away from a bottom of the first groove 2111. The smooth structure is beneficial to guiding the battery assembly 100 to be secured to the first groove 2111. When one end of the battery assembly 100 moves towards the first groove 2111, the smooth structure can have a certain guiding function to guide the battery assembly 100 to be secured to the first groove 2111.
Optionally, the first abutting portion 2132 can be implemented as multiple first abutting portions 2132. The multiple first abutting portions 2132 are spaced apart from one another and protrude from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111.
In the embodiments of the disclosure, the multiple first abutting portions 2132 are spaced apart from one another and protrude from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111. Thus, when the battery assembly 100 is secured to the first groove 2111, the multiple first abutting portions 2132 can better abut against the first lead sub-portion 1225 of the battery assembly 100, thereby improving the electrical connection stability between the multiple first abutting portions 2132 and the first lead sub-portion 1225, and facilitating more effective heating of the battery cell 110 by the heating film 120.
Alternatively, in some embodiments, the multiple first abutting portions 2132 are integrally formed by stamping. Integrally stamping forming of the multiple first abutting portions 2132 simplifies the manufacturing process of the multiple first abutting portions 2132 and helps to save the manufacturing costs.
Alternatively, in other embodiments, the multiple first abutting portions 2132 are formed by welding and connecting. Welding and connecting forming of the multiple first abutting portions 2132 helps to save raw materials and improves structural strength of the multiple first abutting portions 2132.
In some embodiments, the second electrical connector 214 includes a second electrical connection portion 2141 and a second abutting portion 2142. The second electrical connection portion 2141 is disposed on a side wall of the second groove 2121. The second abutting portion 2142 protrudes from a side wall of the second electrical connection portion 2141 towards a center axis of the second groove 2121.
It may be understood that, the second abutting portion 2142 protrudes from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121, that is, the second abutting portion 2142 is disposed on the second electrical connection portion 2141 and faces the interior of the second groove 2121.
In the embodiments of the disclosure, the second abutting portion 2142 protrudes from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121. The battery assembly 100 is secured to the second groove 2121, the second abutting portion 2142 in the second groove 2121 is electrically connected to the third lead sub-portion 1227 of the battery assembly 100 to transfer a current to the third lead sub-portion 1227, so that the current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving heating of the battery cell 110. Compared with a case where the second electrical connection portion 2141 is electrically connected to the third lead sub-portion 1227 directly, the second abutting portion 2142 protrudes from the second electrical connection portion 2141, which enables the second electrical connector 214 to better abut against the battery assembly 100 and enables the second abutting portion 2142 to be better electrically connected to the third lead sub-portion 1227, so that the heating film 120 can better heat the battery cell 110. In addition, when the battery cell 110 expands, the second abutting portion 2142 can abut against the third lead sub-portion 1227 more tightly, which is beneficial to improving stability of electrical connection between the second electrical connector 214 and the battery assembly 100, thereby enabling the heating film 120 to better heat the battery cell 110.
Optionally, in some embodiments, the second abutting portion 2142 protrudes from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121. The second abutting portion 2142 is provided with a smooth structure on a side of the second abutting portion 2142 away from a bottom of the second groove 2121. The smooth structure is beneficial to guiding the battery assembly 100 to be secured to the second groove 2121. When one end of the battery assembly 100 moves towards the second groove 2121, the smooth structure can have a certain guiding function to guide the battery assembly 100 to be secured to the second groove 2121.
Optionally, the second abutting portion 2142 can be implemented as multiple second abutting portions 2142. The multiple second abutting portions 2142 are spaced apart from one another and protrude from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121.
In the embodiments of the disclosure, the multiple second abutting portions 2142 are spaced apart from one another and protrude from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121. Thus, when the battery assembly 100 is secured to the second groove 2121, the multiple second abutting portions 2142 can better abut against the third lead sub-portion 1227 of the battery assembly 100, thereby improving the electrical connection stability between the multiple second abutting portions 2142 and the multiple third lead sub-portion 1227, and facilitating more effective heating of the battery cell 110 by the heating film 120.
Alternatively, in some embodiments, the multiple second abutting portions 2142 are integrally formed by stamping. Integrally stamping forming of the multiple second abutting portions 2142 simplifies the manufacturing process of the multiple second abutting portions 2142 and helps to save the manufacturing costs.
Alternatively, in other embodiments, the multiple second abutting portions 2142 are formed by welding and connecting. Welding and connecting forming of the multiple second abutting portions 2142 helps to save raw materials and improves structural strength of the multiple second abutting portions 2142.
In some embodiments, the multiple first electrical connectors 213 and the multiple second electrical connectors 214 cooperate to connect the heating films 120 of the multiple battery assemblies 100 in one of series connection, parallel connection, or series-parallel connection.
In the embodiments of the disclosure, the multiple first electric connectors 213 and the multiple second electric connectors 214 are connected in one of series connection, parallel connection, or series-parallel connection, thereby achieving connection between the multiple heating films 120 of the battery assemblies 100 in one of series connection, parallel connection, or series-parallel connection. The multiple first electrical connectors 213 and the multiple second electrical connectors 214 can be electrically connected to an external power supply(ies) to power the heating film 120 through the multiple first electrical connectors 213 and the multiple second electrical connectors 214, so that a current(s) can be applied to the heating films 120 of the battery assemblies 100, and the current(s) can flow through the heating portions 1221 of the heating films 120 to dissipate and transfer heat to the battery cell 110, thereby eventually achieving heating of the battery cell 110.
Alternatively, in some embodiments, in a case where each of the multiple battery assemblies 100 is disposed between the first mounting member 211 and the second mounting member 212, the first abutting portion 2132 is electrically connected to the first lead sub-portion 1225 of the heating film 120. The second abutting portion 2142 is electrically connected to the third lead sub-portion 1227 of the heating film 120.
In the embodiments, in a case where the battery assembly 100 is disposed between the first mounting member 211 and the second mounting member 212, the first abutting portion 2132 protrudes from the side wall of the first electrical connection portion 2131 towards the center axis of the first groove 2111. When the battery assembly 100 is secured to the first groove 2111, the first abutting portion 2132 in the first groove 2111 is electrically connected to the first lead sub-portion 1225 of the battery assembly 100 to transfer a current to the first lead sub-portion 1225, so that a current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving the heating of the battery cell 110. In the embodiments of the disclosure, the second abutting portion 2142 protrudes from the side wall of the second electrical connection portion 2141 towards the center axis of the second groove 2121. When the battery assembly 100 is secured to the second groove 2121, the second abutting portion 2142 in the second groove 2121 is electrically connected to the third lead sub-portion 1227 of the battery assembly 100 to transfer a current to the third lead sub-portion 1227, so that the current can flow through the heating portion 1221. Heat dissipated by the heating portion 1221 can be transferred to the battery cell 110 through the first insulating layer 121, thereby eventually achieving the heating of the battery cell 110.
Optionally, referring to
In the embodiments of the disclosure, the battery module 200 has high safety performance and high heating efficiency, so that the battery module 200 can provide a stable power supply for the apparatus body 310, and the electricity-consumption apparatus 300 can operate normally.
Optionally, the electricity-consumption apparatus 300 in the embodiments of the disclosure may be, but is not limited to, a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart toy, a smart bracelet, a smartwatch, an electronic reader, a game machine, or a toy. Alternatively, the electricity-consumption apparatus 300 may also be a large device such as an electric bicycle, an electric vehicle, a ship, a spacecraft, or the like.
It may be understood that the electricity-consumption apparatus 300 in the embodiments is only one form of the electricity-consumption apparatus 300 to which the battery module is applied, and shall not be construed as a limitation to the electricity-consumption apparatus 300 provided in the disclosure, nor shall it be construed as a limitation to the battery module provided in various embodiments of the disclosure.
The term “embodiment” referred to herein means that a particular feature, structure, or feature described in connection with the embodiment may be contained in at least one embodiment of the disclosure. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it refer an independent or alternative embodiment that is mutually exclusive with other embodiments. It is expressly and implicitly understood by those of ordinary skill in the art that an embodiment described herein may be combined with other embodiments. In addition, it may also be understood that, the features, structures, or characteristics described in the embodiments of the disclosure may be combined arbitrarily without contradiction, so as to form another embodiment without departing from the spirit and scope of the technical solutions of the disclosure.
Finally, it may be noted that the foregoing embodiments are merely intended to illustrate but not limit the technical solutions of the disclosure. Although the disclosure is described in detail with reference to the foregoing preferred embodiments, persons of ordinary skill in the art may understand that modifications or equivalent replacements can be made to the technical solutions of the disclosure without departing from the spirit and scope of the technical solutions of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202310652692.7 | Jun 2023 | CN | national |
