Battery pack

Abstract

Provided in the present application is a battery pack. The battery pack comprises: a case having an accommodating cavity; a battery module located in the accommodating cavity; an integrated busbar located in the accommodating cavity and connected to the battery module, the integrated busbar comprising buses and a plurality of insulating supports, the plurality of insulating supports being spaced apart, a slot portion being recessed from each insulating support in the first direction, and the buses being arranged in the slot portions; and heat-conducting portions located in the slot portions and connected to the side of the buses away from the battery module.

Description

battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 29, 2023, with application number 202323262303.4. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of batteries, and in particular to a battery pack. Background Art

[0003] Battery packs have high charge and discharge power. During this process, the battery module generates a large amount of heat, which is difficult to dissipate. This heat causes the battery cells in the battery module to heat up significantly, affecting the life of the battery pack. Currently, battery packs typically dissipate heat by installing a single liquid cooling plate on the battery module. However, this plate has a limited heat transfer area, a slow heat transfer rate, and poor efficiency. It cannot quickly transfer the heat generated by the battery pack, thus affecting the battery pack's lifespan and performance. SUMMARY OF THE INVENTION

[0004] The present application provides a battery pack to solve the above technical problems.

[0005] In view of this, the present application provides a battery pack, wherein the integrated busbar of the battery pack includes a plurality of insulating brackets, and the insulating brackets are provided with a heat-conducting portion, so as to improve the heat dissipation efficiency of the battery pack.

[0006] The present application provides a battery pack, comprising:

[0007] The box body has a receiving cavity;

[0008] A battery module is located in the accommodating cavity;

[0009] an integrated busbar, located in the accommodating cavity and connected to the battery module; the integrated busbar includes a busbar and a plurality of insulating brackets, wherein the plurality of insulating brackets are arranged at intervals, wherein each insulating bracket is provided with a slot extending along a first direction, and the busbar is located in the slot; and

[0010] The heat conducting portion is located in the slot portion and is connected to a side of the bus bar away from the battery module. Beneficial effects

[0011] The beneficial effects of the present application are as follows: by providing a slot portion on a plurality of the insulating brackets and placing the bus and the heat conducting portion in the slot portion, the heat generated by the battery module is transferred to the bus, and then transferred to the heat conducting portion through the bus for heat dissipation, thereby improving the heat dissipation efficiency of the battery pack by using the plurality of the heat conducting portions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of a battery pack provided in one embodiment of the present application.

[0013] FIG2 is a schematic structural diagram of a first liquid cooling plate provided in an embodiment of the present application.

[0014] FIG3 is a structural diagram of a second liquid cooling plate provided in one embodiment of the present application.

[0015] FIG4 is a schematic structural diagram of a housing plate provided in an embodiment of the present application.

[0016] 5A , 5B, 5C, 5D, and 5E are schematic structural diagrams of an integrated busbar provided in one embodiment of the present application.

[0017] Description of reference numerals:

[0018] 100, battery pack; 1, box; 11, receiving chamber; 12, first liquid cooling plate; 121, first water inlet; 122, first water outlet; 13, second liquid cooling plate; 131, second water inlet; 132, second water outlet; 14, outer shell plate; 2, battery module; 3, integrated busbar; 31, busbar; 32, insulating bracket; 321, first sub-insulating bracket; 3211 / 32A, first insulating plate; 3212 / 32B, second insulating plate; 3213 / 32C, first Three insulating plates; 3213a / 32D, avoidance portion; 3214 / 32E, fourth insulating plate; 322, second sub-insulating frame; 3221, pressure relief hole; 323, third sub-insulating frame; 3231 / 32A, first insulating plate; 3232 / 32B, second insulating plate; 3233 / 32C, third insulating plate; 3233a / 32D, avoidance portion; 3234 / 32E, fourth insulating plate; 33, slot portion; 331, through hole; 4, heat conducting portion; 5, heat conducting layer. Modes for Carrying Out the Invention

[0019] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] The present application may repeat reference numerals and / or reference letters in different embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0021] The battery pack provided in this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Referring to FIG. 1 , the present application provides a battery pack 100 , including:

[0023] The box body 10 has a receiving cavity 11;

[0024] The battery module 2 is located in the accommodating cavity 11;

[0025] An integrated busbar 3 is located in the accommodating cavity 11 and connected to the battery module 2; the integrated busbar 3 includes a busbar 31 and a plurality of insulating brackets 32, wherein the plurality of insulating brackets 32 are arranged at intervals, wherein each insulating bracket 32 ​​is recessed with a slot portion 33 along a first direction, and the busbar 31 is located in the slot portion 33; and

[0026] The heat conducting portion 4 is located in the slot 33 and connected to a side of the bus bar 31 away from the battery module 2 .

[0027] Specifically, the battery module 2 generates heat due to charging and discharging, and part of the generated heat is transferred from multiple battery cells to the bus 31, and then transferred from the bus 31 to the heat conductive part 4, thereby conducting the heat of the battery module 2 away, thereby improving the life and safety of the battery pack 100.

[0028] Specifically, the battery module 2 includes multiple cells arranged in an array and formed into an integral unit. Multiple busbars 31 are located on the integrated busbar 3, with each end of the busbar 31 connecting the positive and negative electrodes of two adjacent batteries. Multiple busbars 31 connect the multiple cells in series or parallel to form a single unit, enabling transmission and parameter aggregation.

[0029] Specifically, the heat conducting portion 4 adapts to the shape of the slot portion 33. In this embodiment, the slot portion 33 is rectangular, and the heat conducting portion 4 adapts to the rectangular shape of the slot portion 33. More specifically, the material of the heat conducting portion 4 can be, but is not limited to, thermally conductive gel, and the specific material is subject to actual application. Furthermore, the slot portion 33 is also used to mount the bus bar 31, and the bus bar 31 also adapts to the shape of the slot portion 33, or the slot portion 33 adapts to the shape of the bus bar 31. The bus bar 31 and the slot portion 33 can also be square, triangular, circular, or other geometric shapes, depending on the specific application.

[0030] Specifically, the integrated busbar 3 (Cells Contact System, CCS) also includes necessary components such as a flexible printed circuit (FPC) and a collection chip. The battery pack 100 also includes a battery management system (BMS), with which the integrated busbar 3 connects for signal transmission and aggregation.

[0031] Please refer to Figure 2. In an optional embodiment of the present application, the box body 10 includes a first liquid cooling plate 12, which is located on the side of the integrated busbar 3 away from the battery module 2, and the side of the first liquid cooling plate 12 close to the integrated busbar 3 is connected to the heat conducting part 4.

[0032] Specifically, the orthographic projection of the first liquid cooling plate 12 in the first direction covers the battery module 2. The heat generated by the battery module 2 is transferred to the bus 31, and then transferred to the heat conducting part 4 by the bus 31. The heat conducting part 4 is in contact with the first liquid cooling plate 12, and the heat is transferred to the first liquid cooling plate 12, thereby improving the heat dissipation efficiency of the battery pack 100 and ensuring the life and safety of the battery pack 100.

[0033] Please refer to Figure 2. Furthermore, the first liquid cooling plate 12 includes a first water inlet 121 and a first water outlet 122. The first water inlet 121 and the first water outlet 122 are located on the same side of the first liquid cooling plate 12. The first liquid cooling plate 12 includes a plurality of liquid cooling channels, and the liquid cooling channels are filled with a cooling medium, such as water, but not limited to other cooling media. The first liquid cooling plate 12 is used for heat dissipation. The plurality of liquid cooling channels are relatively parallel along the second direction. The plurality of liquid cooling channels include a first water inlet channel and a first water outlet channel. The number of the first water inlet channels can be, for example, 3, and the number of the first water outlet channels can be 2. In this application, the number of the first water inlet channels and the first water outlet channels is not limited. The main purpose is to achieve heat dissipation. The specific number is subject to actual application. In addition, the first water inlet flow channel is connected to the first water inlet 121, the first water outlet flow channel is connected to the first water outlet 122, and the end of the first water inlet flow channel away from the first water inlet 121 and the end of the first water outlet flow channel away from the first water outlet 122 are connected. For example, multiple first water inlet flow channels are relatively parallel and flow cooling medium at the same time. The cooling medium flows from the first water inlet flow channel to the multiple first water outlet flow channels. During the circulation process, the cooling medium absorbs the heat of the battery module 2 and then flows out from the first water outlet 122 to achieve heat dissipation of the battery pack 100.

[0034] Referring to Figures 1, 2, 3, and 4, in an optional embodiment of the present application, the housing 10 further includes a second liquid cooling plate 13 and a plurality of outer shell plates 14. The second liquid cooling plate 13 is disposed opposite the first liquid cooling plate 12. The plurality of outer shell plates 14 are connected, and one end of the plurality of outer shell plates 14 is connected to the second liquid cooling plate 13 and the other end is connected to the first liquid cooling plate 12. The first liquid cooling plate 12, the second liquid cooling plate 13, and the plurality of outer shell plates 14 form the accommodating chamber 11. Specifically, the second liquid cooling plate 13, the first liquid cooling plate 12, and the outer shell plates 14 are connected by bolts. The second liquid cooling plate 13 is located on the side of the battery module 2 away from the integrated busbar 3. The first liquid cooling plate 12 and the second liquid cooling plate 13 can dissipate heat from both ends of the battery module 2, thereby improving the heat dissipation efficiency of the battery pack 100 and ensuring the life and safety of the battery pack 100.

[0035] Specifically, the number of the outer shell plates 14 is, for example, 4, forming a rectangle adapted to the shape of the battery module 2. The number of the outer shell plates 14 can also be 2, 6 or 8, etc. The number of the outer shell plates 14 is not limited in the present application. Multiple outer shell plates 14 form a receiving cavity with the second liquid cooling plate 13 and the first liquid cooling plate 12. The second liquid cooling plate 13 and the first liquid cooling plate 12 are used to dissipate heat for the battery module 2.

[0036] Referring to Figure 3 , specifically, the second liquid cooling plate 13 includes a second water inlet 131 and a second water outlet 132. The second water inlet 131 and the second water outlet 132 can be located on the same side of the second liquid cooling plate 13. The cooling medium flows in through the second water inlet 131 and out through the second water outlet 132. The second liquid cooling plate 13 includes multiple liquid cooling channels. The multiple liquid cooling channels can be connected end to end, for example. The cooling medium flows out of the second water outlet 132 along the connected liquid cooling channels to achieve a heat dissipation effect.

[0037] Referring to FIG. 1 , in an optional embodiment of the present application, a battery pack 100 further includes:

[0038] The heat-conducting layer 5 is provided between the battery module 2 and the second liquid cooling plate 13 .

[0039] Specifically, the thermally conductive layer 5 is, for example, but not limited to, thermally conductive adhesive. The thermally conductive layer 5 is located on the side of the battery module 2 away from the first liquid cooling plate 12, that is, between the battery module 2 and the second liquid cooling plate 13, and is used to accelerate heat transfer to the second liquid cooling plate 13, thereby achieving heat dissipation for the battery pack 100.

[0040] In an optional embodiment of the present application, a depth of the slot portion 33 along the first direction Y is greater than a depth of the heat conducting portion 4 along the first direction Y.

[0041] Specifically, the slot portion 33 has a certain depth along the first direction Y, and its depth is used to accommodate the bus 31 and the heat conducting portion 4. The heat conducting portion 4 also has a certain depth along the first direction Y. The depth of the heat conducting portion 4 cannot exceed the depth of the slot portion 33. It can be understood that the highest point of the heat conducting portion 4 along the first direction Y is not higher than the highest point of the slot portion 33 along the first direction Y.

[0042] Please refer to Figure 5A. In an optional embodiment of the present application, the insulating bracket 32 ​​includes a first sub-insulating frame 321, a second sub-insulating frame 322 and a third sub-insulating frame 323. The opposite two sides of the second sub-insulating frame 322 are respectively connected to the first sub-insulating frame 321 and the third sub-insulating frame 323. The card slot portion 33 is provided on the first sub-insulating frame 321 and the third sub-insulating frame 323.

[0043] Specifically, the insulating bracket 32 ​​is made of an insulating material, such as plastic, but not limited thereto, and is subject to practical application. Multiple insulating brackets 32 are arranged at intervals to form a layer that can cover the battery module 2, allowing each battery cell to connect to the busbar 31 on the insulating bracket 32 ​​to achieve information and heat transfer.

[0044] Specifically, the second sub-insulating frame 322 is provided with a plurality of pressure relief holes 3221 penetrating the second sub-insulating frame 322 along the first direction Y. The plurality of pressure relief holes 3221 are arranged at intervals along the second direction X. The pressure relief holes 3221 are used for pressure relief, corresponding to the battery cells. When thermal runaway occurs in the battery pack 100, the battery cells release pressure through the pressure relief holes 3221.

[0045] In another embodiment, the plurality of insulating supports 32 may be an integrally formed structure, forming a layer that can cover the battery module 2, so that each battery cell can be connected to the bus 31 on the insulating support 32 to achieve information transmission and heat transfer.

[0046] Please refer to Figure 5D and Figure 5E. The first insulating plate 32A includes a first insulating plate 3211 and a first insulating plate 3231, the second insulating plate 32B includes a second insulating plate 3212 and a second insulating plate 3232, the third insulating plate 32C includes a third insulating plate 3213 and a third insulating plate 3233, the avoidance portion 32D includes a avoidance portion 3213a and a avoidance portion 3233a, and the fourth insulating plate 32E includes a fourth insulating plate 3214 and a fourth insulating plate 3234.

[0047] Please refer to Figures 5A, 5B, 5C, 5D, and 5E. In an optional embodiment of the present application, the first sub-insulating frame 321 includes a first insulating plate 3211, a second insulating plate 3212, a third insulating plate 3213, and a fourth insulating plate 3214. The first insulating plate 3211 and the second insulating plate 3212 are arranged opposite to each other. One end of the third insulating plate 3213 is surrounded by the first insulating plate 3211, and the other end is connected to the second insulating plate 3212 to form a cavity. The second insulating plate 3212 is provided with a slot hole along the first direction Y. The fourth insulating plate 3214 is located in the cavity, and one end of the fourth insulating plate 3214 is surrounded by the slot hole, and the other end is connected to the first insulating plate 3211 to form the slot portion 33.

[0048] Furthermore, the third sub-insulating frame 323 includes a first insulating plate 3231, a second insulating plate 3232, a third insulating plate 3233 and a fourth insulating plate 3234, the first insulating plate 3231 and the second insulating plate 3232 are arranged opposite to each other, one end of the third insulating plate 3233 is surrounded on the first insulating plate 3231, and the other end is connected to the second insulating plate 3232 to form a cavity, the second insulating plate 3232 is provided with a slot hole along the first direction Y, the fourth insulating plate 3234 is located in the cavity, and one end of the fourth insulating plate 3234 is surrounded by the slot hole, and the other end is connected to the first insulating plate 3231 to form the slot portion 33.

[0049] In another embodiment, the cavity can be filled with a solid, for example. It can be understood that the first sub-insulating frame 321 and the third sub-insulating frame 323 are insulating entities, and a slot hole is opened in the first sub-insulating frame 321 and the third sub-insulating frame 323 along the first direction Y. The slot hole or the slot hole does not penetrate the first sub-insulating frame 321 and the third sub-insulating frame 323 on the side close to the battery module 2 to form the slot portion 33.

[0050] In an optional embodiment of the present application, there are multiple slots 33 , and the multiple slots 33 are arranged at intervals along a second direction X perpendicular to the first direction Y on the first sub-insulating frame 321 and the third sub-insulating frame 323 .

[0051] Specifically, the plurality of slots 33 are arranged at intervals along the second direction X on the first sub-insulating frame 321 and the third sub-insulating frame 323, and their arrangement is based on the busbar 31. The busbar 31 connects the positive and negative poles of two adjacent battery cells respectively. The intervals between the plurality of slots 33 are adapted to the positions of the two adjacent battery cells and the busbar 31, and the specific arrangement shall be based on actual application.

[0052] Furthermore, the busbar 31 also includes an output-stage busbar and an input-stage busbar, each of which is connected to the insulating bracket 32 ​​and located within the slot 33. Specifically, the output-stage busbar and the input-stage busbar are located at opposite ends of the first sub-insulating bracket 321 and the third sub-insulating bracket 323, respectively. In one embodiment, the output-stage busbar is located at one end of the first sub-insulating bracket 321, and the input-stage busbar is located at an end of the third sub-insulating bracket 323 away from the first sub-insulating bracket 321. The specific arrangement depends on actual application.

[0053] Furthermore, the slot portion 33 that accommodates the output-level bus and the input-level bus is adapted to the shapes of the two, and the fourth insulating plate 3214 and the fourth insulating plate 3234 of the slot portion 33 are provided with an avoidance space on the side away from the bus 31. Parts of the output-level bus and the input-level bus are located in the avoidance space, and one end thereof extends outward, so that the output-level bus and the input-level bus can be connected to external parts in parallel.

[0054] In an optional embodiment of the present application, the slot portion 33 defines a plurality of through holes 331 along the first direction Y, and the battery module 2 is connected to the bus bar 31 located in the slot portion 33 via the through holes 331 .

[0055] Specifically, the position of the through hole 331 corresponds to the pole of the battery cell, for example, but is not limited thereto. The number of the through holes 331 is, for example, two, so that the busbar 31 is connected to the battery cell through the through hole 331 to transfer heat.

[0056] In an optional embodiment of the present application, the third insulating plate 3213 of the first sub-insulating frame 321 is provided with a plurality of avoidance portions 3213a along the first direction Y, and one end of the avoidance portion 3213a extends to the first insulating plate 3211 but does not penetrate the first insulating plate 3211, so as to ensure that the molding process can be carried out and that some parts will not shrink and deform due to injection molding. In addition, the heat conducting portion 4 is a relatively viscous heat conducting gel, and the plurality of avoidance portions 3213a will not affect the heat conducting performance of the heat conducting portion 4 and the life and safety of the battery pack 100. Specifically, the plurality of avoidance portions 3213a are arranged at intervals, and each of the avoidance portions 3213a has a certain width along the second direction X, and the width is preferably large enough to prevent excessive overflow of the heat conducting portion 4.

[0057] Furthermore, the third insulating plate 3233 of the third sub-insulating frame 323 is provided with a plurality of avoidance portions 3233a along the first direction Y, and the avoidance portions 3233a extend to the first insulating plate 3231, and the plurality of avoidance portions 3233a are located on the side of the third insulating plate 3233 close to the second sub-insulating frame 322 or away from the second sub-insulating frame 322, to ensure that the molding process can be carried out and that some positions will not shrink and deform due to injection molding. In addition, the heat conducting portion 4 is a relatively sticky heat conducting gel, and the plurality of avoidance portions 3233a will not affect the heat conducting performance of the heat conducting portion 4 and the life and safety of the battery pack 100. Specifically, the plurality of avoidance portions 3233a are arranged at intervals, and each of the avoidance portions 3233a has a certain width along the second direction X, and the width is preferably large enough to prevent excessive overflow of the heat conducting portion 4.

[0058] Specifically, the avoidance portion 3213a and the avoidance portion 3233a are recessed along the first direction Y, and their maximum recessed depth can extend to the first insulating plate 3211 and the first insulating plate 3231. The specific depth is not limited in this application and is subject to actual application.

[0059] The battery pack provided in the present application includes at least the following working processes or principles: a box body 10, having a accommodating cavity 11; a battery module 2, located in the accommodating cavity 11; an integrated busbar 3, located in the accommodating cavity 11 and connected to the battery module 2; the integrated busbar 3 includes a busbar 31 and a plurality of insulating brackets 32, and the plurality of insulating brackets 32 are arranged at intervals, wherein each of the insulating brackets 32 is recessed with a slot portion 33 along the first direction Y, and the busbar 31 is located in the slot portion 33; and a heat conducting portion 4, located in the slot portion 33 and connected to the side of the busbar 31 away from the battery module 2. By providing a slot portion 33 on the plurality of insulating brackets 32 and placing the bus 31 and the heat conducting portion 4 in the slot portion 33, the heat generated by the battery module 2 is transferred to the bus 31, and then transferred to the heat conducting portion 4 through the bus 31 for heat dissipation. A first liquid cooling plate 12 and a second liquid cooling plate 13 are also provided at both ends of the battery module 2, which cooperate with the heat conducting portion 4 and the heat conducting layer 5 to accelerate the transfer of heat, that is, the heat transferred to the heat conducting portion 4 and the heat conducting layer 5 is transferred to the first liquid cooling plate 12 and the second liquid cooling plate 13, thereby improving the heat dissipation efficiency and ensuring the life and safety of the battery pack 100.

Claims

1. A battery pack, wherein, comprising: a box body (1) having a receiving cavity (11); a battery module (2) located in the receiving cavity (11); an integrated busbar (3) located in the receiving cavity (11) and connected to the battery module (2); the integrated busbar (3) includes a busbar (31) and a plurality of insulating brackets (32), the plurality of insulating brackets (32) are arranged at intervals, wherein each insulating bracket (32) is recessed with a card slot portion (33) along a first direction, and the busbar (31) is located in the card slot portion (33); and a heat conducting portion (4) located in the card slot portion (33) and connected to a side of the busbar (31) away from the battery module (2).

2. The battery pack according to claim 1, wherein, the box body (1) includes a first liquid cooling plate (12), the first liquid cooling plate (12) is located on a side of the integrated busbar (3) away from the battery module (2), and a side of the first liquid cooling plate (12) close to the integrated busbar (3) is connected to the heat conducting portion (4).

3. The battery pack according to claim 2, wherein, the box body (1) further includes a second liquid cooling plate (13) and a plurality of outer shell plates (14), the second liquid cooling plate (13) is disposed opposite to the first liquid cooling plate (12), the plurality of outer shell plates (14) are connected to each other and one ends of the plurality of outer shell plates (14) are connected to the second liquid cooling plate (13), and the other ends are connected to the first liquid cooling plate (12), the first liquid cooling plate (12), the second liquid cooling plate (13) and the plurality of outer shell plates (14) form the receiving cavity (11), wherein the second liquid cooling plate (13) is located on a side of the battery module (2) away from the integrated busbar (3).

4. The battery pack according to claim 3, wherein, further comprising: a heat conducting layer (5) disposed between the battery module (2) and the second liquid cooling plate (13).

5. The battery pack according to any one of claims 1 to 4, wherein, a depth of the card slot portion (33) along the first direction is greater than a depth of the heat conducting portion (4) along the first direction.

6. The battery pack according to any one of claims 1 to 4, wherein, the insulating bracket (32) includes a first sub-insulating bracket (321), a second sub-insulating bracket (322) and a third sub-insulating bracket (323), opposite sides of the second sub-insulating bracket (322) are respectively connected to the first sub-insulating bracket (321) and the third sub-insulating bracket (323), and the card slot portion (33) is disposed on the first sub-insulating bracket (321) and the third sub-insulating bracket (323).

7. The battery pack according to claim 6, wherein, Both the first sub-insulating bracket (321) and the third sub-insulating bracket (323) include a first insulating plate (32A), a second insulating plate (32B), a third insulating plate (32C), and a fourth insulating plate (32E). The first insulating plate (32A) and the second insulating plate (32B) are disposed opposite to each other. One end of the third insulating plate (32C) surrounds the first insulating plate (32A), and the other end is connected to the second insulating plate (32B) to form a cavity. The second insulating plate (32B) is provided with a slot hole along the first direction. The fourth insulating plate (32E) is located in the cavity, and one end of the fourth insulating plate (32E) surrounds the slot hole, and the other end is connected to the first insulating plate (32A) to form the slot portion (33).

8. The battery pack according to claim 6, wherein, the number of the slot portions (33) is multiple, and the multiple slot portions (33) are arranged at intervals along a second direction perpendicular to the first direction on the first sub-insulating bracket (321) and the third sub-insulating bracket (323).

9. The battery pack according to claim 8, wherein, the slot portion (33) is provided with a plurality of through holes (331) along the first direction, and the battery module (2) is connected to the bus bar (31) located in the slot portion (33) through the through holes (331).

10. The battery pack according to claim 7, wherein, the third insulating plate (32C) is provided with a plurality of avoidance portions (32D) along the first direction, and one end of the avoidance portion (32D) extends to the first insulating plate (32A).

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