Patent Application
20230086270
This application claims the priority benefits of China application serial no. 202111116817.1, filed on Sep. 23, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
The disclosure relates to the technical field of batteries, and in particular, to a battery and a battery apparatus.
In the related art, the positive current collector and the negative current collector of a battery is disposed in the housing. Since the positive current collector is insulated from the housing, the electric potential of the housing is lower. The problem of corrosion of the embedded lithium in the housing may thus occur, and battery performance is thereby affected.
The disclosure provides a battery and a battery apparatus.
According to the first aspect of the disclosure, the disclosure provides a battery, and the battery includes a housing, a positive current collector, a negative current collector and a resistor assembly. The positive current collector is disposed at the housing. The negative current collector is disposed at the housing. The positive current collector is electrically connected to the housing through the resistor assembly, and the resistor assembly includes a first resistor and a second resistor arranged in parallel. A resistance value of the first resistor is greater than a resistance value of the second resistor.
According to the second aspect of the disclosure, the disclosure further provides a battery apparatus including the abovementioned battery.
For a better understanding of the disclosure, reference may be made to exemplary embodiments shown in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted, or in some instances proportions may have been exaggerated, so as to emphasize and clearly illustrate the features described herein. In addition, related elements or components can be variously arranged, as known in the art. Further, in the drawings, like reference numerals designate same or like parts throughout the several views.
The technical solutions in the exemplary embodiments of the disclosure will be described clearly and explicitly in conjunction with the drawings in the exemplary embodiments of the disclosure. The description proposed herein is just the exemplary embodiments for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that and various modifications and variations could be made thereto without departing from the scope of the disclosure.
In the description of the present disclosure, unless otherwise specifically defined and limited, the terms “first”, “second” and the like are only used for illustrative purposes and are not to be construed as expressing or implying a relative importance. The term “plurality” is two or more. The term “and/or” includes any and all combinations of one or more of the associated listed items.
In particular, a reference to “the” object or “a” and “an” object is intended to denote also one of a possible plurality of such objects. Unless otherwise defined or described, the terms “connect”, “fix” should be broadly interpreted, for example, the term “connect” can be “fixedly connect”, “detachably connect”, “integrally connect”, “electrically connect” or “signal connect”. The term “connect” also can be “directly connect” or “indirectly connect via a medium”. For the persons skilled in the art, the specific meanings of the abovementioned terms in the present disclosure can be understood according to the specific situation.
Further, in the description of the present disclosure, it should be understood that spatially relative terms, such as “above”, “below” “inside”, “outside” and the like, are described based on orientations illustrated in the figures, but are not intended to limit the exemplary embodiments of the present disclosure.
In the context, it should also be understood that when an element or features is provided “outside” or “inside” of another element(s), it can be directly provided “outside” or “inside” of the other element, or be indirectly provided “outside” or “inside” of the another element(s) by an intermediate element.
An embodiment of the disclosure provides a battery. With reference to
In an embodiment of the disclosure, the battery includes the housing 10, the positive current collector 20, the negative current collector 30, and the resistor assembly 40. The positive current collector 20 is electrically connected to the housing 10 through the resistor assembly 40. The resistor assembly 40 includes the first resistor 41 and the second resistor 42 arranged in parallel, and a resistance value of the first resistor 41 is greater than a resistance value of the second resistor 42. As such, a total resistance value of the first resistor 41 and the second resistor 42 is less than the resistance value of the second resistor 42. In this way, an electric potential of the housing 10 may be increased, the housing 10 may be prevented from being corroded, and performance of the battery is thereby improved.
It should be noted that, as the resistance values of the first resistor 41 and the second resistor 42 are configured to be different and the first resistor 41 and the second resistor 42 are configured to be arranged in parallel; therefore, a resistor with a relatively small resistance value is connected in series between the positive current collector 20 and the housing 10. As such, an electric potential between the positive current collector 20 and the housing 10 is relatively high, and the housing 10 is thereby prevented from being corroded.
In an embodiment, the battery includes a cell and an electrolyte, and the battery is the smallest unit capable of performing electrochemical reactions such as charging/discharging. The cell refers to a unit formed by winding or laminating a stacked part, and the stacked part includes a first electrode, a separator and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarities of the first electrode and the second electrode may be interchanged. The cell may be disposed in the housing 10.
The positive current collector 20 and the negative current collector 30 may include portions of the cell. The positive current collector 20 may include a positive tab 21, and the negative current collector 30 may include a negative tab 31. The positive current collector 20 may further include a positive terminal component 22, and the negative current collector 30 may further include a negative terminal component 32. The positive tab 21 and the positive terminal component 22 are electrically connected, and the negative tab 31 and the negative terminal component 32 are electrically connected. As such, the cell may perform charging/discharging through the positive terminal component 22 and the negative terminal component 32.
In an embodiment, the positive current collector 20 and the negative current collector 30 are disposed on the housing 10. The positive terminal component 22 of the positive current collector 20 may be located on the housing 10, and the negative terminal component 32 of the negative current collector 30 may be located on the housing 10. A part of the positive terminal component 22 and a part of the negative terminal component 32 may be spaced apart from each other and disposed outside the housing 10.
In some embodiments, the positive current collector 20 and the negative current collector 30 are disposed in the housing 10. The positive tab 21 of the positive current collector 20 may be located in the housing 10, and the negative tab 31 of the negative current collector 30 may be located in the housing 10.
In an embodiment, the resistance value of the first resistor 41 is greater than or equal to 10 MΩ, and the resistance value of the second resistor ranges from 50Ω to 10,000Ω. As such, the total resistance value of the first resistor 41 and the second resistor 42 is less than 50Ω, so it is ensured that the potential between the positive current collector 20 and the housing 10 is maintained at a relatively high value, that is, it is ensured that the potential of the housing 10 is greater than a corrosion potential.
In some embodiments, a voltage between the positive current collector 20 and the housing 10 is less than or equal to 50 mV, that is, the electric potential of the housing 10 may be greater than a corrosion potential. The corrosion potential may be less than or equal to 2V.
In an embodiment, the first resistor 41 and the second resistor 42 of the resistor assembly 40 are not resistor devices provided by the related art. The first resistor 41 and the second resistor 42 may be other structures having specific resistance values. For instance, the first resistor 41 may be a structure made of an insulating material, and the insulating material may be rubber, polyphenylene sulfide, etc., such that the resistance value of the first resistor 41 is relatively large. The second resistor 42 may be a structure made of a semi-conductive material, and the semi-conductive material may be a conductive material made of a conductive fiber doped with polyphenylene sulfide, such that the resistance of the second resistor 42 is relatively small.
In an embodiment, the first resistor 41 includes one or more of a mica insulating material, ceramic, synthetic resin, insulating glue, a fiber product, rubber, plastic and asbestos, such that the resistance value of the first resistor 41 is greater than or equal to 10 M.
A material of the first resistor 41 may be one of a mica insulating material, ceramic, synthetic resin, insulating glue, a fiber product, rubber, plastic and asbestos. Alternatively, the material of the first resistor 41 may be a combination of at least two of a mica insulating material, ceramic, synthetic resin, insulating glue, a fiber product, rubber, plastic and asbestos, so that it is ensured that the first resistor 41 has a relatively large resistance value.
In an embodiment, the second resistor 42 includes one or more of a carbon film resistor, a metal film resistor, a metal oxide and a semiconductor material, such that the resistance value range of the second resistor is 50Ω to 10,000Ω. The metal oxide may be a zinc oxide, an aluminum oxide, etc., and the semiconductor material may be doped silicon, gallium arsenide, aluminum gallium arsenide, etc.
A material of the second resistor 42 may be one of a carbon film resistor, a metal film resistor, a zinc oxide, doped silicon, gallium arsenide and aluminum gallium arsenide. Alternatively, the material of the second resistor 42 may be a combination of at least two of a carbon film resistor, a metal film resistor, a zinc oxide, doped silicon, gallium arsenide and aluminum gallium arsenide, so that it is ensured that the second resistor 42 has a relatively small resistance value.
In an embodiment, the positive current collector 20 includes a fusing structure 25. Herein, when a current passing through the fusing structure 25 exceeds a threshold value, the fusing structure 25 disconnects the electrical connection between the positive current collector 20 and the second resistor 42. As such, it is thereby ensured that when a short circuit is present in the battery, if a current still exists between the positive current collector 20 and the housing 10, a larger resistance value may be provided between the positive current collector 20 and the housing 10, and a thermal runaway problem may thus be prevented from occurring.
It should be noted that, as shown in
The fusing structure 25 disconnects the electrical connection between the positive current collector 20 and the second resistor 42, that is, the current between the positive current collector 20 and the housing 10 may not flow through the second resistor 42. In some embodiments, after the fusing structure 25 disconnects the electrical connection between the positive current collector 20 and the second resistor 42, the current between the positive current collector 20 and the housing 10 f only lows through the first resistor 41. Since the resistance value of the first resistor 41 is larger, the first resistor 41 may not be broken down, and the thermal runaway problem may thus be prevented from occurring. In some embodiments, after the fusing structure 25 disconnects the electrical connection between the positive current collector 20 and the second resistor 42, the battery apparatus 1 may be directly disconnected from the battery, that is, there is no current between the positive current collector 20 and the housing 10, and the thermal runaway problem may thus be prevented from occurring.
In an embodiment, as shown in
When the housing 10 is electrically connected to both the first resistor 41 and the second resistor 42, that is, the positive terminal component 22 supplies power to both the first resistor 41 and the second resistor 42, since the first resistor 41 and the second resistor 42 are connected in parallel, the total resistance value is smaller, and the problem of corrosion is prevented from occurring. When the positive terminal component 22 supplies power to the first resistor 41, since the resistance value of the first resistor 41 is larger, the battery is protected, and thermal runaway is prevented from occurring.
In an embodiment, as shown in
In an embodiment, the positive tab 21 and the positive terminal component 22 may be directly connected to each other through the fusing structure 25. The fusing structure 25 may be a fuse structure for safety, and the fuse structure may be at least one of a wire and a fuse. A material of the fuse structure may be selected from a conductive material such as conductive metal, a conductive metal oxide, or other conductive inorganic materials. An insulating structure may be wrapped on a surface of the fuse structure, and the insulating structure may protect the fuse structure.
In an embodiment, as shown in
In some embodiments, the fusing structure 25 may be a portion of the adapter piece 24. For instance, a through hole is provided on the adapter piece 24, so an area of the adapter piece 24 is decreased, and the fusing structure 25 is formed.
In an embodiment, as shown in
It should be noted that, when the first resistor 41 is located between the positive tab 21 and the positive terminal component 22, the resistance value of the first resistor 41 is required to be kept below a predetermined value, such that the electrical connection between the positive tab 21 and the positive terminal component 22 is ensured, so as to accordingly ensure the normal use of the battery.
In an embodiment, the fusing structure 25 is disposed on the busbar 23. As such, when the fusing structure 25 is disconnected, the busbar 23 is disconnected, and the power supply from the battery apparatus 1 to the battery is thereby disconnected. The busbar 23 is configured to implement the series connection and parallel connection between the batteries. Therefore, after the busbar 23 is disconnected, the connection between the batteries may be disconnected, and the problem of reverse high voltage may not occur in a single battery.
In an embodiment, as shown in
In an embodiment, as shown in
Alternatively, the second resistor 42 may be provided to be connected between the positive tab 21 and the positive terminal component 22, as shown in
In an embodiment, the first resistor 41 is disposed between the busbar 23 and the first housing member. Alternatively, when the first resistor 41 is disposed between the busbar 23 and the second housing member, the fusing structure 25 may be disposed on the busbar 23. As such, when the fusing structure 25 is disconnected, the busbar 23 is disconnected, and the power supply from the battery apparatus 1 to the battery is thereby disconnected.
In an embodiment, as shown in
It should be noted that, the busbar 23 is located outside the housing 10. Therefore, when the first resistor 41 and the second resistor 42 are disposed between the housing 10 and the busbar 23, the first resistor 41 and the second resistor 42 are located outside the housing 10. A portion of the positive terminal component 22 may be located outside the housing 10. When the first resistor 41 and the second resistor 42 are disposed between the housing 10 and the positive terminal component 22, the first resistor 41 and the second resistor 42 are located outside the housing 10. A portion of the positive terminal component 22 may be located inside the housing 10. When the first resistor 41 and the second resistor 42 are disposed between the housing 10 and the positive terminal component 22, the first resistor 41 and the second resistor 42 are located inside the housing 10.
In an embodiment, the first housing member and the second housing member are connected to each other to form a sealed space for sealing the cell. The first housing member or the second housing member may be a cover.
It should be noted that, the structure of the negative current collector 30 is not particularly limited herein, and description thereof may be found with reference to the description of the positive current collector 20. For instance, the negative current collector 30 may include the negative tab 31 and the negative terminal component 32, and the negative tab 31 and the negative terminal component 32 may be directly connected to each other. Alternatively, the negative tab 31 may be connected to the negative terminal component 32 through an adapter piece. The negative current collector 30 may further include a busbar, a fusing structure, or a resistor assembly.
In the battery provided by the embodiments of the disclosure, the first resistor having a large resistance value is connected in series between the positive terminal component and the housing, so the thermal runaway problem caused by the reverse high voltage is prevented. At the same time, the second resistor having a small resistance value is connected between the fusing structure and the housing, and the first resistor and the second resistor are connected in parallel, such that the problem of corrosion is prevented from occurring in the housing.
An embodiment of the disclosure further provides a battery apparatus including the abovementioned battery.
A battery apparatus provided by an embodiment of the disclosure includes the battery, and the battery includes the housing 10, the positive current collector 20, the negative current collector 30 and the resistor assembly 40. The positive current collector 20 is electrically connected to the housing 10 through the resistor assembly 40. The resistor assembly 40 includes the first resistor 41 and the second resistor 42 arranged in parallel, and the resistance value of the first resistor 41 is greater than the resistance value of the second resistor 42. As such, the total resistance value of the first resistor 41 and the second resistor 42 is less than the resistance value of the second resistor 42. In this way, the electric potential of the housing 10 may be increased, the housing 10 may be prevented from being corroded, and performance of the battery apparatus is thereby improved.
In an embodiment, the battery apparatus includes a plurality of batteries, and the plurality of batteries may be connected in series and/or in parallel. The batteries may be connected in series or parallel via the busbar.
In an embodiment, the battery apparatus may a battery module or a battery pack.
The battery module includes a plurality of batteries, and the plurality of batteries may be secured through end plates and side plates.
The battery pack includes a plurality of batteries and a battery box, and the battery box is configured to secure the plurality of batteries.
It should be noted that, the battery pack includes the battery, the battery may be multiple, and the multiple batteries are arranged in the box. Herein, after forming the battery module, the batteries may be installed in the box. Herein, the battery module may include the end plates and the side plates configured for securing the batteries. Alternatively, the batteries may be directly disposed in the box, that is, the batteries are not required to be arranged into groups, and the end plates and the side plates may be removed at this time.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The disclosure is intended to cover any variations, uses or adaptations of the disclosure. These variations, uses, or adaptations follow the general principles of the disclosure and include common general knowledge or conventional technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are illustrative, and the real scope and spirit of the present disclosure is defined by the appended claims.
It should be understood that the disclosure is not limited to the precise structures that have been described above and shown in the drawings, and various modifications and variations can be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202111116817.1 | Sep 2021 | CN | national |
