battery

Abstract

This application relates to the field of battery thermal conductivity technology, and in particular to a battery including a cell assembly and a battery thermal conductive sheet. The battery thermal conductive sheet is attached to one side of the cell assembly in a first direction. The cell assembly includes multiple cells arranged side-by-side along a second direction. The battery thermal conductive sheet includes a thermal conductive body and multiple disconnected portions, which are spaced apart along the second direction on the thermal conductive body. A gap is formed between adjacent cells. Both the disconnected portions and the gap extend along a third direction, which intersects the second direction. The first direction intersects the plane defined by the second direction and the third direction. When the battery thermal conductive sheet is attached to the cell assembly, the gaps and disconnected portions are positioned correspondingly. The battery provided by this application avoids local tearing or breakage, ensures the integrity of the thermal conductive sheet, improves the overall performance and lifespan of the cell assembly, and ensures the stable operation of the lithium-ion battery system.

Description

Technical Field

[0001] This application relates to the field of battery thermal conductivity technology, and in particular to a battery. Background Technology

[0002] With the rapid development of new energy technologies, lithium-ion batteries are widely used in electronic products such as tablets, foldable phones, and laptops due to their advantages such as high energy density and long cycle life. As the core component of lithium-ion batteries, the performance and lifespan of the battery cell assembly play a crucial role in the stability and reliability of the entire system. Temperature is a significant factor affecting the performance and lifespan of lithium-ion batteries and battery cell assemblies. The capacity, efficiency, and charge / discharge characteristics of batteries vary significantly at different temperatures. When the temperature inconsistency among the individual cells in a battery cell assembly is substantial, it can severely impact overall performance.

[0003] Currently, graphene sheets are frequently used in battery cell assemblies for efficient heat dissipation due to their thinness, flexibility, ultra-high planar thermal conductivity, and precise heat distribution. However, while synthetic graphite sheets possess a certain degree of flexibility, they face numerous challenges in practical applications. During the high-frequency charging and discharging of lithium-ion battery cell assemblies, numerous chemical reactions within each individual cell generate gas, leading to varying degrees of expansion on the battery surface. Since the graphite sheets are fixed to the cells using double-sided adhesive during battery assembly, deformation of the cells can cause localized tearing or breakage of the graphite sheets. After breakage, heat cannot be transferred between adjacent sections, resulting in uneven surface temperature across the entire cell assembly and hindering rapid heat conduction. Furthermore, during drop and vibration tests of the cell assembly, the cells are fixed to the support frame with adhesive tape. Significant vibrations can make it difficult for the cells to maintain a level surface, again causing localized tearing or breakage of the graphite sheets, affecting the thermal conductivity of the cell assembly and consequently negatively impacting the overall battery performance and lifespan. Utility Model Content

[0004] The purpose of this application is to provide a battery that, to a certain extent, solves the technical problems existing in the prior art where, during the high-frequency charging and discharging process of battery cells, the battery surface will expand to varying degrees, and the deformation of the battery cells will cause localized tearing or breakage of the graphite sheets. After breakage, heat cannot be transferred between adjacent cross-sections, resulting in uneven surface temperature of the battery cell assembly and inability to conduct heat quickly. Furthermore, during drop and vibration tests of the battery cell assembly, large vibrations will make it difficult for the battery cells to remain on the same horizontal plane, which will also cause localized tearing or breakage of the graphite sheets, affecting the thermal conductivity of the battery cell assembly.

[0005] According to a first aspect of this application, a battery is provided, including a cell assembly and a battery heat-conducting sheet, the battery heat-conducting sheet being attached to one side of the cell assembly in a first direction, the cell assembly including a plurality of cells arranged side by side along a second direction; The battery heat-conducting sheet includes a heat-conducting body and a plurality of disconnected portions, wherein the plurality of disconnected portions are spaced apart on the heat-conducting body along the second direction; A gap is formed between two adjacent cells. Both the break and the gap extend along a third direction. The third direction intersects with the second direction, and the first direction intersects with the plane defined by the second direction and the third direction. When the battery heat-conducting sheet is attached to the battery cell assembly, the positions of the gap and the disconnection part are respectively set.

[0006] Preferably, the disconnection portion forms an open end at one of the third-direction ends of the heat-conducting body; In the third direction, the size of the disconnected portion is smaller than the size of the heat-conducting body.

[0007] Preferably, the open ends of the plurality of disconnected portions on the heat-conducting body are all disposed on the same side of the heat-conducting body in the third direction.

[0008] Preferably, the break is a notch or shear line extending in the third direction.

[0009] Preferably, in the second direction, the size of the notch is less than or equal to the size of the gap.

[0010] Preferably, the battery protection board is also included, which is disposed on the third-facing side of the cell assembly, and each cell is electrically connected to the battery protection board.

[0011] Preferably, it further includes: The bracket allows both the battery cell assembly and the battery protection board to be embedded within it. A cover plate is disposed on the third-party upward side of the bracket and snaps into the bracket, the battery cell assembly and the battery protection board are both confined between the bracket and the cover plate, the cover plate is disposed at the third-party upward end of the bracket where the battery protection board is located, and at least a portion of the cover plate extends to the battery cell assembly.

[0012] Preferably, it further includes a first insulating covering portion, which covers the side of the bracket opposite to the cover plate in the first direction.

[0013] Preferably, it further includes a second insulating covering portion, which covers the side of the cover plate opposite to the bracket in the first direction, and the second insulating covering portion is connected to the first insulating covering portion.

[0014] Preferably, the battery heat-conducting sheet is disposed between the battery cell assembly and the bracket, and / or, the battery heat-conducting sheet is disposed between the battery cell assembly and the cover plate.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The battery heat-conducting sheet provided in this application has multiple slits spaced apart along a second direction, each corresponding to a gap between adjacent battery cells. When a battery cell expands due to gas generation during high-frequency charging and discharging, or when it shifts during vibration testing, the gaps between the battery cells change with the deformation of the cells (e.g., the gaps may increase, decrease, deform, or adjacent cells may shift along a first direction). This causes stress concentration at the locations corresponding to the gaps in the battery heat-conducting sheet. The slits at these locations release the stress in those areas, providing a deformation buffer space. Unlike traditional graphite sheets, the battery heat-conducting sheet is not forcibly stretched due to cell deformation, thus avoiding localized tearing or breakage, ensuring the integrity of the heat-conducting sheet, and laying the foundation for stable heat transfer. The combination of the heat-conducting body and multiple slits ensures the overall thermal conductivity of the heat-conducting sheet while providing sufficient flexibility and buffering capacity through the slits. When the cell deforms or vibrates, the heat-conducting body can avoid damage due to stress concentration by using the buffering effect of the disconnection part. This allows the heat-conducting sheet to maintain good heat conduction function under complex working conditions, thereby improving the overall performance and service life of the cell assembly and ensuring the stable operation of the lithium-ion battery system.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front view of the battery heat-conducting sheet provided in an embodiment of this application. Figure 2 A front view of the battery heat-conducting sheet provided in another embodiment of this application; Figure 3 This is a schematic diagram of the assembly structure of the battery heat-conducting sheet and the battery cell assembly provided in the embodiments of this application; Figure 4for Figure 3 A magnified schematic diagram of the provided battery heat-conducting sheet at point A; Figure 5 for Figure 3 A magnified schematic diagram of the provided battery heat-conducting sheet at point B; Figure 6 This is a schematic diagram of the exploded structure of a battery provided in an embodiment of this application; Figure 7 This is an isometric structural diagram of the bracket provided in the embodiments of this application; Figure 8 This is an isometric structural diagram of the second insulating covering portion provided in an embodiment of this application.

[0019] Figure label: 1-Battery heat-conducting sheet; 11-Heat-conducting body; 12-Disconnection part; 2-Cell assembly; 20-Cell; 21-Gap; 3-Battery protection board; 4-Bracket; 41-Outer frame; 42-Baffle; 43-Supporting rib; 44-Slot; 5-Cover plate; 6-First insulating covering part; 7-Second insulating covering part; 71-Overlap edge.

[0020] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0022] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following reference Figures 1 to 8 This application describes a battery according to some embodiments.

[0027] See Figures 1 to 8 As shown, an embodiment of the first aspect of this application provides a battery, including a cell assembly 2 and a battery heat-conducting sheet 1. The battery heat-conducting sheet 1 is attached to one side of the cell assembly 2 in a first direction F1. The cell assembly 2 includes a plurality of cells 20 arranged side-by-side along a second direction F2. The battery heat-conducting sheet 1 includes a heat-conducting body 11 and a plurality of disconnected portions 12, which are spaced apart along the second direction F2 on the heat-conducting body 11. A gap 21 is formed between two adjacent cells 20. Both the disconnected portions 12 and the gap 21 extend along a third direction F3, which intersects the second direction F2. The first direction F1 intersects the plane defined by the second direction F2 and the third direction F3. When the battery heat-conducting sheet 1 is attached to the cell assembly 2, the positions of the gap 21 and the disconnected portions 12 are correspondingly arranged.

[0028] According to the battery heat-conducting sheet 1 provided by the above technical features, the battery heat-conducting sheet 1 is provided with multiple disconnected portions 12 distributed at intervals along the second direction F2, and each corresponds to a gap 21 between adjacent battery cells 20. When the battery cell 20 expands due to gas generation during high-frequency charging and discharging, or when it is displaced during vibration testing, the gap 21 between the battery cells 20 will change with the deformation of the battery cell 20 (for example, the gap 21 may become larger, smaller, deform, or adjacent battery cells 20 may shift along the first direction), which causes stress concentration in the battery heat-conducting sheet 1 at the position corresponding to the gap. The disconnected portion 12 at this position can release the stress of the battery heat-conducting sheet 1 in this part through the disconnected portion 12, providing deformation buffer space for the heat-conducting sheet. With the presence of the disconnected portion 12, the battery heat-conducting sheet 1 will not be forcibly stretched due to the deformation of the battery cell 20 like a traditional graphite sheet, thereby avoiding local tearing or breakage, ensuring the integrity of the heat-conducting sheet, and laying the foundation for stable heat transfer. The combined structure of the heat-conducting body 11 and multiple disconnections 12 not only ensures the overall thermal conductivity of the heat-conducting sheet, but also provides it with sufficient flexibility and buffering capacity through the disconnections 12. When the cell 20 is deformed or vibrates, the heat-conducting body 11 can avoid damage due to stress concentration by means of the buffering effect of the disconnections 12, so that the heat-conducting sheet can still maintain good thermal conductivity under complex working conditions, thereby improving the overall performance and service life of the cell assembly 2 and ensuring the stable operation of the lithium-ion battery system.

[0029] Preferably, such as Figures 1 to 8 As shown in the figure, F1 can be an example of the first direction F1 described above, F2 can be an example of the second direction F2 described above, and F3 can be an example of the third direction F3 described above. Preferably, any two of the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other to accommodate the structure of most square batteries.

[0030] Preferably, such as Figures 1 to 4 As shown, the aforementioned disconnection 12 can form an open end at one end of the heat-conducting body 11 in the third direction F3. This effectively increases the deformation adaptability of the heat-conducting body 11. When the battery cell 20 expands due to chemical reaction or displaces during vibration, the open end provides additional deformation space, allowing the heat-conducting sheet to freely extend or contract along the open direction. Compared to a closed structure, the open end avoids stress accumulation at the end, effectively preventing the heat-conducting sheet from tearing from the end under stress, further reducing the risk of breakage, ensuring the integrity of the heat-conducting sheet under complex working conditions, and thus ensuring the continuity of heat conduction.

[0031] Preferably, such as Figures 1 to 4As shown, the size of the disconnection portion 12 on the third direction F3 can be smaller than the size of the heat-conducting body 11. Thus, when the disconnection portion 12 forms an open end on one end of the heat-conducting body 11 on the third direction F3, and the size of the disconnection portion 12 on the third direction F3 is smaller than the size of the heat-conducting body 11, the other end of the heat-conducting body 11 on the third direction F3 (i.e., the end of the disconnection portion 12 away from the open end) remains connected. In other words, the disconnection portion 12 does not cut off the heat-conducting body 11 along the third direction F3, effectively ensuring the integrity and continuity of the heat-conducting body 11. On the one hand, it facilitates heat transfer between the heat-conducting bodies 11 located on both sides of the disconnection portion 12; on the other hand, it improves the assembly efficiency of the battery heat-conducting sheet 1.

[0032] Preferably, such as Figure 1 and Figure 2 As shown, the open ends of the multiple disconnected portions 12 on the heat-conducting body 11 are all located on the same side of the heat-conducting body 11 in the third direction F3. This facilitates the alignment and arrangement of the battery cells 20 in the third direction F3, so as to provide placement space for the battery protection plate 3 to be disposed on the side of the battery cell assembly 2 in the third direction F3.

[0033] Preferably, such as Figure 1 and Figure 5 As shown, the aforementioned break 12 can be a notch extending along the third direction F3. That is, the break 12 is a structure formed by cutting off a portion from the entire heat-conducting sheet material. In other words, the projected area of ​​the heat-conducting sheet before cutting is larger than the projected area of ​​the heat-conducting sheet after cutting when projected onto the plane determined by the first direction F1 and the second direction F2 along the third direction F3.

[0034] Preferably, such as Figure 5 As shown, in the second direction F2, the size of the aforementioned notch (W1) can be less than or equal to the size of the gap 21 (W2), that is, Figure 5 As shown, W1≤W2, thus effectively ensuring the comprehensive coverage of the battery cell 20 by the heat-conducting body 11 and ensuring the uniformity of heat conduction of the battery cell 20.

[0035] It should be noted that, in order to illustrate the assembly positional relationship between the battery cell assembly 2 and the battery heat-conducting sheet 1, in Figures 3 to 4 In the diagram, the structure of the battery heat-conducting sheet 1 is rendered in perspective, and the structure of the battery heat-conducting sheet 1 is represented by dashed lines, while the structure of the battery cell assembly 2 is represented by solid lines.

[0036] Optionally, such as Figure 2As shown, the aforementioned break 12 can also be a shear line extending along the third direction F3. In other words, the break 12 is a structure formed by cutting the entire heat-conducting sheet material. That is to say, whether before or after cutting, the projected area of ​​the heat-conducting sheet along the third direction F3 onto the plane determined by both the first direction F1 and the second direction F2 does not change.

[0037] Optionally, not shown in the figure, the battery heat-conducting sheet 1 may also include an insulating packaging bag, and the heat-conducting body 11 may be wrapped in the insulating packaging bag to protect the battery heat-conducting sheet 1.

[0038] It should be noted that the insulating packaging bag is an intermediate structure between the manufacturing and use of the battery heat-conducting sheet 1. In other words, the insulating packaging bag is only used from the manufacturing to the use of the battery heat-conducting sheet 1.

[0039] Optionally, the aforementioned insulating packaging bag may include a first insulating film and a second insulating film, the edges of which are connected to form a bag structure for accommodating the battery heat-conducting sheet 1. The battery heat-conducting sheet 1 may be disposed between the first and second insulating films to ensure the flatness of the battery heat-conducting sheet 1 and the complete coverage of the battery heat-conducting sheet 1 by the insulating packaging bag.

[0040] In an embodiment, preferably, such as Figure 3 , Figure 4 and Figure 6 As shown, the battery may also include a battery protection board 3, which is disposed on one side of the cell assembly 2 in the third direction F3. Each cell 20 is electrically connected to the battery protection board 3, thereby realizing the connection and control of each cell 20 in the cell assembly 2.

[0041] Optionally, such as Figure 3 and Figure 6 As shown, the battery protection board 3 may include a printed circuit board that extends along the second direction F2, and each cell 20 of the cell group 2 may be electrically connected to the printed circuit board.

[0042] Preferably, such as Figure 6 and Figure 7 As shown, the battery may also include a bracket 4, in which the battery cell assembly 2 and the battery protection board 3 can be embedded to support and protect the battery cell assembly 2 and the battery protection board 3.

[0043] Preferably, such as Figure 6 and Figure 7As shown, the bracket 4 may include an outer frame 41 and a baffle 42. The outer frame 41 may be arranged around the battery cell assembly 2. The baffle 42 may be fixed to one end of the outer frame 41 in the first direction F1. The baffle 42 may be arranged opposite to the battery protection plate 3 in the first direction F1 so as to protect the battery protection plate 3 by the shielding of the baffle 42.

[0044] Preferably, such as Figure 6 and Figure 7 As shown, the bracket 4 may also include a support rib 43, which can extend along the third direction F3. One end of the support rib 43 can be connected to the baffle 42, and the other end can be connected to the side of the outer frame 41 opposite to the baffle 42. On the one hand, it can effectively improve the support strength of the bracket 4; on the other hand, the hollow structure formed by the support rib 43 in the bracket 4 can provide deformation space for the expansion of the cell 20, thereby ensuring the safety of the cell 20.

[0045] Preferably, such as Figure 6 As shown, there can be multiple support ribs 43. The multiple support ribs 43 can correspond one-to-one with the gaps 21 of the battery cell group 2 to avoid interference between the support ribs 43 and the battery cell 20.

[0046] Preferably, the bracket 4 can be a bracket frame such as a rubber frame or a plastic frame.

[0047] Optionally, the outer frame 41, baffle 42, support rib 43 and slot 44 described above can be connected as a whole to improve the connection stability of the bracket 4.

[0048] Preferably, such as Figure 6 As shown, the battery heat-conducting sheet 1 can be disposed between the battery cell assembly 2 and the bracket 4 so that the bracket 4 can protect the battery heat-conducting sheet 1 and improve the installation stability of the battery heat-conducting sheet 1.

[0049] However, this is not the only option; the aforementioned battery heat-conducting sheet 1 can also be disposed between the cell assembly 2 and the cover plate 5. Alternatively, the aforementioned battery heat-conducting sheet 1 can be disposed on both sides of the cell assembly 2 in the first direction F1.

[0050] Optionally, not shown in the figure, the battery cell assembly 2 may be provided with a positioning pin, and correspondingly, the battery heat-conducting sheet 1 may be provided with a corresponding positioning hole, so as to achieve precise positioning between the battery cell assembly 2 and the battery heat-conducting sheet 1 through the insertion of the positioning pin and the positioning hole.

[0051] Optionally, not shown in the figure, the battery may also include a thermally conductive adhesive layer, which is disposed between the battery cell assembly 2 and the battery thermal conductive sheet 1 to ensure the fixed stability of the battery thermal conductive sheet 1.

[0052] Preferably, such as Figure 6 As shown, the battery may further include a cover plate 5, which may be disposed on one side of the bracket 4 in the third direction F3 and snapped into the bracket 4. The battery cell assembly 2 and the battery protection board 3 are both confined between the bracket 4 and the cover plate 5. The cover plate 5 is disposed at the end of the bracket 4 in the third direction F3 where the battery protection board 3 is located, and at least a portion of the cover plate 5 extends to the battery cell assembly 2. On the one hand, it fixes the battery cell assembly 2 and the battery protection board 3; on the other hand, the cover plate 5 and the baffle 42 together provide separate protection for both sides of the battery protection board 3 in the first direction F1.

[0053] Preferably, such as Figure 6 and Figure 7 As shown, the bracket 4 may also be provided with a slot 44. Correspondingly, the cover plate 5 may be provided with a claw that corresponds to the slot 44, so that the bracket 4 and the cover plate 5 can be detachably connected through the snap-fit ​​between the slot 44 and the claw.

[0054] Preferably, such as Figure 6 As shown, the battery may further include a first insulating cover 6 and a second insulating cover 7. The first insulating cover 6 covers the side of the bracket 4 facing away from the cover plate 5 in the first direction F1, and the second insulating cover 7 covers the side of the cover plate 5 facing away from the bracket 4 in the first direction F1. The second insulating cover 7 is connected to the first insulating cover 6 to ensure the complete coverage of both the first insulating cover 6 and the second insulating cover 7.

[0055] Preferably, such as Figure 8 As shown in the figure, the second insulating covering part 7 is provided with an overlap edge 71. The overlap edge 71 can be provided along the edge of the second insulating covering part 7 so as to connect with the first insulating covering part 6 through the overlap edge 71, so as to ensure the complete coverage of both the first insulating covering part 6 and the second insulating covering part 7.

[0056] Optionally, both the first insulating covering part 6 and the second insulating covering part 7 can be insulating flexible materials such as insulating tape or insulating paper that can cover the battery.

[0057] Optionally, not shown in the figure, the aforementioned overlap edge 71 may also be provided on the first insulating covering part 6 so as to connect with the second insulating covering part 7 through the overlap edge 71.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery, characterized in that, The battery pack includes a battery cell assembly and a battery heat-conducting sheet. The battery heat-conducting sheet is used to attach to one side of the battery cell assembly in a first direction. The battery cell assembly includes a plurality of battery cells, which are arranged side by side along a second direction. The battery heat-conducting sheet includes a heat-conducting body and a plurality of disconnected portions, wherein the plurality of disconnected portions are spaced apart on the heat-conducting body along the second direction; A gap is formed between two adjacent cells. Both the break and the gap extend along a third direction. The third direction intersects with the second direction, and the first direction intersects with the plane defined by the second direction and the third direction. When the battery heat-conducting sheet is attached to the battery cell assembly, the positions of the gap and the disconnection part are respectively set.

2. The battery according to claim 1, characterized in that, The disconnection portion forms an open end at one of the three directions of the heat-conducting body; In the third direction, the size of the disconnected portion is smaller than the size of the heat-conducting body.

3. The battery according to claim 2, characterized in that, The open ends of the plurality of disconnected portions on the heat-conducting body are all located on the same side of the heat-conducting body in the third direction.

4. The battery according to claim 1, characterized in that, The break is a notch or shear line extending in the third direction.

5. The battery according to claim 4, characterized in that, In the second direction, the size of the notch is less than or equal to the size of the gap.

6. The battery according to any one of claims 1 to 5, characterized in that, It also includes a battery protection board, which is disposed on the third-facing side of the cell assembly, and each cell is electrically connected to the battery protection board.

7. The battery according to claim 6, characterized in that, Also includes: The bracket allows both the battery cell assembly and the battery protection board to be embedded within it. A cover plate is disposed on the third-party upward side of the bracket and snaps into the bracket, the battery cell assembly and the battery protection board are both confined between the bracket and the cover plate, the cover plate is disposed at the third-party upward end of the bracket where the battery protection board is located, and at least a portion of the cover plate extends to the battery cell assembly.

8. The battery according to claim 7, characterized in that, It also includes a first insulating covering portion, which covers the side of the bracket opposite to the cover plate in the first direction.

9. The battery according to claim 8, characterized in that, It also includes a second insulating covering portion, which covers the side of the cover plate opposite to the bracket in the first direction, and the second insulating covering portion is connected to the first insulating covering portion.

10. The battery according to claim 7, characterized in that, The battery heat-conducting sheet is disposed between the battery cell assembly and the bracket, and / or the battery heat-conducting sheet is disposed between the battery cell assembly and the cover plate.

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