Battery module and energy storage device

Abstract

The present application provides a battery module and an energy storage device. The battery module comprises a first wall, a second wall, a first cell unit group, a first member and a second member, wherein the first wall and the second wall are spaced apart from each other in a first direction; the first cell unit group is located between the first wall and the second wall, and the first cell unit group comprises a plurality of first cell units arranged in the first direction; each first cell unit comprises a first cell and a first support fixed to the first cell; the first member is separately fixed to the first wall and the second wall; the first member comprises a first connecting portion connected to the first support; the second member and the first member are spaced apart from each other in a third direction, and the second member is separately fixed to the first wall and the second wall; the second member comprises a second connecting portion connected to the first support, and the first connecting portion and the second connecting portion are located on the same side of the first cell unit group; and the first direction is perpendicular to the third direction.

Description

Battery modules and energy storage devices Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery module and energy storage device. Background Technology

[0002] A battery module consists of multiple cells, which are usually fixed to the casing by glue. This complex structure is not conducive to the lightweighting of the battery module.

[0003] Summary of the Invention

[0004] This application provides a battery module and energy storage device to improve the lightweight design of the battery module.

[0005] In a first aspect, embodiments of this application provide a battery module, comprising a first wall and a second wall, a first cell unit group, a first component, and a second component. The first wall and the second wall are spaced apart along a first direction. The first cell unit group is located between the first wall and the second wall, and includes a plurality of first cell units arranged along the first direction. Each first cell unit includes a first cell and a first bracket fixed to the first cell. The first component is fixed to the first wall and the second wall respectively. The first component includes a first connecting portion connected to the first bracket. The second component and the first component are spaced apart along a third direction, and the second component is fixed to the first wall and the second wall respectively. The second component includes a second connecting portion connected to the first bracket, and the first connecting portion and the second connecting portion are located on the same side of the first cell unit group. The first direction is perpendicular to the third direction. The first wall, the second wall, the first component, and the second component provide support for the first cell unit group and are beneficial for improving the lightweight of the battery module. The first component and the second component fix the first cell through the first bracket. The overall structure of the battery module is simpler. The first cell is fixed to the first component and the second component through the first bracket, which reduces the stress on the first cell. The first bracket plays a protective role for the first cell, reducing the possibility of damage to the first cell.

[0006] In one or more of the above optional embodiments, viewed along the second direction, the first wall, the second wall, the first connecting portion, and the second connecting portion form a first opening, with a portion of each first battery cell located within the first opening; the first direction, the second direction, and the third direction are perpendicular to each other. The portion of the first battery cell is exposed through the first opening, resulting in faster heat dissipation from the first battery cell. This reduces the possibility of the first battery cell's temperature continuously rising or even igniting, reduces the possibility of excessive internal temperature and pressure within the battery module, minimizes the impact on other devices connected to the battery module, and improves the safety of the battery module.

[0007] In one or more of the above optional embodiments, the first bracket abuts against the first connecting portion and the second connecting portion. The first connecting portion and the second connecting portion fix the first bracket by abutting, which simplifies the overall structure and manufacturing of the battery module.

[0008] In one or more of the above optional embodiments, the battery module includes a first insulating member and a second insulating member. The first insulating member is located between the first bracket and the first connecting portion, and the second insulating member is located between the first bracket and the second connecting portion. The first insulating member serves to insulate between the first bracket and the first connecting portion, reducing the possibility of a short circuit between the first battery cell and the first connecting portion through contact. The second insulating member serves to insulate between the first bracket and the second connecting portion, reducing the possibility of a short circuit between the first battery cell and the second connecting portion through contact.

[0009] In one or more of the above optional embodiments, the first component includes a first extension connected to the first connecting portion; along a third direction, the first bracket and the first extension are sequentially arranged, the first extension is connected to the first bracket, or the first extension and the first bracket form a first gap, the length of the first gap being W1, 0.2mm≤W1≤2mm. The first extension limits the first bracket in the third direction.

[0010] In one or more of the above optional embodiments, the second component includes a second extension connected to the second connecting portion; along a third direction, the second extension and the first bracket are sequentially arranged, the second extension is connected to the first bracket, or the second extension and the first bracket form a second gap, the length of the second gap being W2, 0.2mm≤W2≤2mm. The second extension limits the first bracket in the third direction.

[0011] In one or more of the above optional embodiments, the battery module includes a first cover, which covers a first opening when viewed along a second direction; the first cover and each first battery cell are spaced apart to form a third gap; a first channel is formed between the first cover and a second connecting portion, the first channel connecting the third gap and the outside of the battery module. Heat generated by the first battery cell reaches the outside of the battery module through the first opening, the first channel, and the third gap. The first battery cell dissipates heat quickly, reducing the possibility of its temperature continuously rising or even igniting, reducing the possibility of excessive internal temperature and pressure within the battery module, reducing the impact on other devices connected to the battery module, and improving the safety of the battery module.

[0012] In one or more of the above optional embodiments, the first component includes two first fixing parts extending from the first connecting portion, one of which is fixed to the first wall and the other is fixed to the second wall. The connection strength between the first component and the first and second walls is higher, the overall structure of the battery module is more stable, and the fixing and protection effect on the first cell is better.

[0013] The second component includes two second fixing parts extending from the second connecting part, one of which is fixed to the first wall and the other is fixed to the second wall. The connection strength between the second component and the first and second walls is higher, the overall structure of the battery module is more stable, and the fixation and protection of the first cell is better.

[0014] In one or more of the above optional embodiments, the battery module includes a third component and a fourth component. The third component is fixed to the first wall and the second wall respectively, and includes a third connecting portion connected to the first bracket. The fourth component and the third component are spaced apart along a third direction. The fourth component is fixed to the first wall and the second wall respectively, and includes a fourth connecting portion connected to the first bracket. The third connecting portion and the fourth connecting portion are located on the same side of the first cell unit group. The first wall, the second wall, the third component, and the fourth component provide support for the first cell unit group. The third component and the fourth component fix the first cell through the first bracket. The overall structure of the battery module is simpler and the cost is lower. Furthermore, fixing the first cell to the third and fourth components through the first bracket reduces the stress on the first cell. The first bracket protects the first cell and reduces the possibility of damage to the first cell.

[0015] Viewed from the opposite direction, the first wall, second wall, third connecting portion, and fourth connecting portion form a second opening, with a portion of each first battery cell located within this second opening. The portion of the first battery cell is exposed through the second opening, allowing for faster heat dissipation. This reduces the likelihood of the first battery cell's temperature continuously rising or even igniting, decreases the possibility of excessive internal temperature and pressure within the battery module, minimizes the impact on other devices connected to the battery module, and improves the safety of the battery module.

[0016] In one or more of the above optional embodiments, the first bracket abuts against the third connecting portion and the fourth connecting portion. The overall structure and fabrication of the battery module are simpler.

[0017] In one or more of the above optional embodiments, the battery module includes a third insulating member and a fourth insulating member. The third insulating member is located between the first bracket and the third connecting portion, and the fourth insulating member is located between the first bracket and the fourth connecting portion. The third insulating member provides insulation between the first bracket and the third connecting portion, reducing the possibility of a short circuit between the first battery cell and the third connecting portion through contact. The fourth insulating member provides insulation between the first bracket and the fourth connecting portion, reducing the possibility of a short circuit between the first battery cell and the fourth connecting portion through contact.

[0018] In one or more of the above optional embodiments, the third component includes a third extension connected to the third connecting portion; along the third direction, the first bracket and the third extension are arranged sequentially, the third extension is connected to the first bracket, or the third extension and the first bracket form a fourth gap, the length of the fourth gap being W4, 0.2mm≤W4≤2mm. The third extension limits the first bracket in the third direction.

[0019] In one or more of the above optional embodiments, the fourth component includes a fourth extension connected to the fourth connecting portion; along a third direction, the fourth extension and the first bracket are sequentially arranged, the fourth extension is connected to the first bracket, or the fourth extension and the first bracket form a fifth gap, the length of the fifth gap being W5, 0.2mm≤W5≤2mm. The fourth extension limits the first bracket in the third direction.

[0020] In one or more of the above optional embodiments, the battery module includes a second cover, which covers a second opening when viewed from the opposite direction of the second direction. The second cover and each first battery cell are spaced apart, forming a sixth gap. A second channel is formed between the second cover and the third connecting portion, connecting the sixth gap and the outside of the battery module. Heat generated by the first battery cell reaches the outside of the battery module through the second opening, the second channel, and the sixth gap. This results in faster heat dissipation for the first battery cell, reducing the possibility of its temperature continuously rising or even igniting, reducing the possibility of excessive internal temperature and pressure within the battery module, minimizing the impact on other devices connected to the battery module, and improving the safety of the battery module.

[0021] In one or more of the above optional embodiments, the third component includes two third fixing parts extending from the third connecting part, one of which is fixed to the first wall and the other is fixed to the second wall. The connection strength between the third component and the first and second walls is higher, the overall structure of the battery module is more stable, and the fixing and protection effect on the first cell is better.

[0022] The fourth component includes two fourth fixing parts extending from the fourth connecting part, one of which is fixed to the first wall and the other is fixed to the second wall. The connection strength between the fourth component and the first and second walls is higher, the overall structure of the battery module is more stable, and the fixation and protection of the first cell is better.

[0023] In one or more of the above optional embodiments, the first component and the third component form a third opening, and the second component and the fourth component form a fourth opening; the first battery cell includes two electrode terminals; the electrode terminals extend from the first bracket, and a portion of the electrode terminals is located within the third opening and / or the fourth opening. The heat generated by the first battery cell is dissipated through the third opening and / or the fourth opening, resulting in a faster heat dissipation rate for the first battery cell. This reduces the possibility of the first battery cell's temperature continuously rising or even being ignited, reduces the possibility of excessive internal temperature and pressure within the battery module, reduces the impact on other devices connected to the battery module, and improves the safety of the battery module.

[0024] In one or more of the above optional embodiments, the first bracket and the first battery cell are integrally formed. This improves the connection strength between the first bracket and the first battery cell.

[0025] In one or more of the above optional embodiments, the first cell includes a first cell housing and two first electrode terminals. The first cell housing includes a first main body and two first sealing portions. The first electrode terminals extend from the first sealing portions out of the cell housing. A first bracket is connected to the first main body and each of the first sealing portions.

[0026] In one or more of the above optional embodiments, the battery module includes a first elastic member located between the first wall and the first cell unit group, the first elastic member abutting against the first wall and the first cell unit group; the first elastic member is configured to provide expansion space for the first cell.

[0027] In one or more of the above optional embodiments, the first wall includes a first rear wall and a first front wall spaced apart along a first direction, and a first upper wall and a first lower wall spaced apart along a second direction. The first front wall, first rear wall, first upper wall, and first lower wall are connected to form a cavity. The first lower wall has a first hole communicating with the first cavity, and a first fixing part passes through the first hole and is located in the cavity. The first front wall has a first fixing hole, and the first fixing part has a second fixing hole. The battery module includes a fixing member that passes through the first fixing hole and the second fixing hole to fix the first fixing part and the first front wall. The first component does not protrude from the first wall, and the possibility of stress concentration points appearing on the first wall when subjected to external forces is small, which helps to reduce the space occupied by the battery module.

[0028] In one or more of the above optional embodiments, the battery module includes a second cell unit group, a fifth component, and a sixth component. The second cell unit group is located between a first wall and a second wall, and the first and second cell unit groups are spaced apart along a third direction. The second cell unit group includes a plurality of second cell units arranged along a first direction. Each second cell unit includes a second cell and a second bracket fixed to the second cell. The fifth component is fixed to both the first and second walls. The fifth component includes a fifth connecting portion connected to the second bracket. The sixth component is spaced apart from the fifth component along a third direction, and the sixth component is fixed to both the first and second walls. The sixth component includes a sixth connecting portion connected to the second bracket, and the fifth and sixth connecting portions are located on the same side of the first cell unit group. The first wall, the second wall, the fifth component, and the sixth component provide support for the second cell unit group. The fifth and sixth components, through the second bracket, fix the second cells.

[0029] Viewed along the second direction, the first wall, the second wall, the fifth connecting part, and the sixth connecting part form a fifth opening, with a portion of each second cell located within this fifth opening. The portion of the second cell is exposed through the fifth opening, allowing for faster heat dissipation. This reduces the possibility of the second cell's temperature continuously rising or even igniting, decreases the likelihood of excessive internal temperature and pressure within the battery module, minimizes the impact on other devices connected to the battery module, and improves the safety of the battery module.

[0030] In one or more of the above optional embodiments, the first component and the sixth component are connected by a first connector.

[0031] In one or more of the above optional embodiments, the battery module includes a seventh component and an eighth component. The seventh component is fixed to the first wall and the second wall, respectively, and includes a seventh connecting portion fixed to the second bracket. The eighth component and the seventh component are spaced apart along a third direction. The eighth component is fixed to the first wall and the second wall, respectively, and includes an eighth connecting portion fixed to the second bracket. The seventh connecting portion and the eighth connecting portion are located on the same side of the first cell unit group. The first wall, the second wall, the seventh component, and the eighth component provide support for the first cell unit group. The seventh component and the eighth component fix the second cell through the second bracket.

[0032] Secondly, embodiments of this application provide an energy storage device, including at least one battery module as described above.

[0033] In one or more of the above optional embodiments, the energy storage device includes a housing and a plurality of battery modules, the plurality of battery modules being spaced apart along a second direction; the plurality of battery modules are located inside the housing; the housing includes a top wall and a bottom wall, and each battery module is connected to the bottom wall in a first direction that is the direction of gravity. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a three-dimensional structural schematic diagram of a battery module provided in some embodiments of this application;

[0036] Figure 2 is an exploded structural diagram of a battery module provided in some embodiments of this application;

[0037] Figure 3 is a schematic diagram of the structure of a battery module provided in some other embodiments of this application;

[0038] Figure 4 is a three-dimensional structural diagram of the first cell unit of the battery module provided in some embodiments of this application;

[0039] Figure 5 is a three-dimensional structural diagram of the first and sixth components of the battery module provided in some embodiments of this application;

[0040] Figure 6 is a three-dimensional structural diagram of the second component of the battery module provided in some embodiments of this application;

[0041] Figure 7 is a structural schematic diagram of a battery module provided in some embodiments of this application from one perspective;

[0042] Figure 8 is a cross-sectional structural diagram of a battery module provided in some embodiments of this application;

[0043] Figure 9 is a partially enlarged structural diagram of point A in the battery module in Figure 8;

[0044] Figure 10 is a three-dimensional structural schematic diagram of a battery module provided in some other embodiments of this application;

[0045] Figure 11 is an exploded structural diagram of a battery module provided in some other embodiments of this application;

[0046] Figure 12 is a structural schematic diagram of a battery module provided in some other embodiments of this application from one perspective;

[0047] Figure 13 is a structural schematic diagram of a battery module provided in some embodiments of this application from another perspective;

[0048] Figure 14 is a schematic diagram of the structure of a first battery cell provided in some embodiments of this application;

[0049] Figure 15 is a schematic diagram of a partial structure of a battery module provided in some embodiments of this application;

[0050] Figure 16 is a schematic diagram of the structure of the first wall of the battery module provided in some embodiments of this application;

[0051] Figure 17 is a three-dimensional structural schematic diagram of an energy storage device provided in some embodiments of this application;

[0052] Figure 18 is a perspective view of a portion of the structure of an energy storage device provided in some embodiments of this application;

[0053] Figure 19 is a partially enlarged structural diagram of point B in the energy storage device in Figure 17.

[0054] Icons: 10-Battery module; 101-First opening; 102-First channel; 103-Second opening; 104-Third opening; 105-Fourth opening; 106-Cavity; 107-First hole; 108-First fixing hole; 109-Fifth opening; 110-First wall; 120-Second wall; 130-First component; 130a-First connector; 131-First connecting part; 132-First extension; 133-First fixing part; 13 31-Second fixing hole; 140-Second component; 141-Second connecting part; 142-Second extension; 143-Second fixing part; 150-Third component; 150a-Second connector; 151-Third connecting part; 152-Third extension; 153-Third fixing part; 160-Fourth component; 161-Fourth connecting part; 162-Third extension; 163-Fourth fixing part; 170-Fifth component; 171-Fifth connecting part; 18 0 - Sixth component; 181 - Sixth connecting part; 190 - Seventh component; 191 - Seventh connecting part; 1100 - Eighth component; 1101 - Eighth connecting part; 200 - First cell unit group; 210 - First cell unit; 211 - First cell; 2111 - First cell housing; 2111a - First main body; 2111b - First sealing part; 2112 - Electrode terminal; 212 - First bracket; 310 - First insulating component; 320 - Second insulating element; 330-Third insulating element; 340-Fourth insulating element; 410-First covering element; 410a-Third gap; 430-First elastic element; 500-Second cell unit group; 510-Second cell unit; 511-Second cell; 512-Second bracket; 20-Outer shell; 20a-Top wall; 20b-Bottom wall; 20c-First partition; 20d-Second partition; X-First direction; Y-Second direction; Z-Third direction.

[0055] Specific implementation methods

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0059] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0060] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0061] Battery modules generate heat during use, especially under conditions such as high-rate operation, continuous charging and discharging, which can easily lead to overheating of the battery cells. Battery modules are typically supported and fixed by a casing, which is heavy and expensive. Furthermore, the casing covers a large area of ​​the battery cells, resulting in slow and poor heat dissipation. If the pressure released by the battery cells cannot be released in time, the cell temperature can continue to rise or even ignite, leading to excessively high internal temperature and pressure within the battery module. This could potentially cause an explosion, affecting other devices connected to the battery module and resulting in low safety during its use.

[0062] To improve the safety of battery modules, this application provides a battery module including a first wall and a second wall, a first cell unit group, a first component, and a second component. The first wall and the second wall are spaced apart along a first direction. The first cell unit group is located between the first wall and the second wall and includes a plurality of first cell units arranged along the first direction. Each first cell unit includes a first cell and a first bracket fixed to the first cell. The first component is fixed to the first wall and the second wall respectively. The first component includes a first connecting portion connected to the first bracket. The second component and the first component are spaced apart along a third direction, and the second component is fixed to the first wall and the second wall respectively. The second component includes a second connecting portion connected to the first bracket, and the first connecting portion and the second connecting portion are on the same side of the first cell unit group. The first direction is perpendicular to the third direction.

[0063] In this battery module structure, the first wall, second wall, first component, and second component support the first cell unit and contribute to the lightweight design of the battery module. The first component and second component fix the first cell in place via the first bracket. The overall structure of the battery module is simpler. The first cell is fixed to the first component and second component via the first bracket, reducing the stress on the first cell. The first bracket also protects the first cell, minimizing the possibility of damage.

[0064] The battery module provided in this application embodiment can be a secondary battery or a primary battery, such as a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and this application embodiment is not limited in this respect. The electrochemical device can be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited in this respect either.

[0065] Referring to Figures 1 to 6, Figure 1 is a three-dimensional structural schematic diagram of a battery module provided in some embodiments of this application; Figure 2 is an exploded structural schematic diagram of a battery module provided in some embodiments of this application; Figure 3 is a structural schematic diagram of a battery module provided in other embodiments of this application; Figure 4 is a three-dimensional structural schematic diagram of the first cell unit of a battery module provided in some embodiments of this application; Figure 5 is a three-dimensional structural schematic diagram of the first and sixth components of a battery module provided in some embodiments of this application; and Figure 6 is a three-dimensional structural schematic diagram of the second component of a battery module provided in some embodiments of this application.

[0066] This application provides a battery module 10 in some embodiments. The battery module 10 includes a first wall 110 and a second wall 120, a first cell unit group 200, and a first component 130. The first wall 110 and the second wall 120 are spaced apart along a first direction X. The first cell unit group 200 is located between the first wall 110 and the second wall 120, and includes a plurality of first cell units 210 arranged along the first direction X. Each first cell unit 210 includes a first cell 211 and a first bracket 212 fixed to the first cell 211. The first component 130 is fixed to the first wall 110 and the second wall 120 respectively. The first component 130 includes a first connecting portion 131 connected to the first bracket 212. Optionally, the first component 130 can be connected to the first bracket 212 of some of the plurality of first cell units 210, or it can be connected to the first bracket 212 of each of the first cell units 210.

[0067] In some embodiments, the battery module 10 includes a second component 140, which is spaced apart from the first component 130 along a third direction Z. The second component 140 is fixed to the first wall 110 and the second wall 120, respectively. The second component 140 includes a second connecting portion 141 connected to the first bracket 212. The first connecting portion 131 and the second connecting portion 141 are located on the same side of the first cell unit group 2002. The first direction X is perpendicular to the third direction Z. Optionally, the second component 140 can be connected to the first bracket 212 of at least one of the plurality of first cell units 210, or it can be connected to the first bracket 212 of each of the first cell units 210.

[0068] In some embodiments, "connection" should be interpreted broadly, for example, it can refer to abutment, fixed connection, detachable connection, etc.; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0069] The first wall 110, the second wall 120, the first component 130, and the second component 140 provide support for the first cell unit group 200 and contribute to the weight reduction of the battery module 10. The first connecting part 131 is fixed to the first bracket 212, the second connecting part 141 is fixed to the first bracket 212, and the first component 130 and the second component 140 fix the first cell 211 through the first bracket 212. The fixing methods include, but are not limited to, snap-fit ​​fixing, screw fixing, adhesive bonding, and abutment fixing.

[0070] The first cell unit group 200 is fixed and supported by the first wall 110 and the second wall 120, the first component 130 and the second component 140, which makes the overall structure of the battery module 10 simpler. The first cell 211 is fixed to the first component 130 and the second component 140 by the first bracket 212, which reduces the force on the first cell 211. The first bracket 212 plays a protective role for the first cell 211, reducing the possibility of damage to the first cell 211.

[0071] In some embodiments, the first wall 110, the second wall 120, the first component 130, and the second component 140 can be made of high-strength materials, such as steel, aluminum alloy, and other metal materials, so that the first wall 110, the second wall 120, the first component 130, and the second component 140 have high stress performance, thereby reducing the possibility of deformation or damage to the first wall 110, the second wall 120, the first component 130, and the second component 140 due to stress or environmental changes, and thus making the battery module 10 more reliable.

[0072] In other embodiments, the first wall 110, the second wall 120, the first component 130, and the second component 140 may also be non-metallic materials with high strength, such as carbon fiber and rigid plastic.

[0073] Please also refer to Figure 7, which is a structural schematic diagram of a battery module provided in some embodiments of this application from one perspective.

[0074] In some embodiments, referring to FIG7, when viewed along the second direction Y, the first wall 110, the second wall 120, the first connecting portion 131, and the second connecting portion 141 form a first opening 101, and a portion of each first cell 211 is located in the first opening 101. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0075] Part of the first cell 211 is exposed through the first opening 101. The first cell 211 dissipates heat quickly, reducing the possibility that the temperature of the first cell 211 will continue to rise or even be ignited. This also reduces the possibility that the internal temperature and internal pressure of the battery module 10 will be too high, reducing the impact on other devices connected to the battery module 10 and improving the safety of the battery module 10.

[0076] Please refer to Figures 8 and 9 together. Figure 8 is a cross-sectional view of a battery module provided in some embodiments of this application; Figure 9 is a partially enlarged view of the battery module at point A in Figure 8.

[0077] In some embodiments, the first bracket 212 abuts against the first connecting portion 132 and the second connecting portion 141. The first connecting portion 132 and the second connecting portion 141 fix the first bracket 212 by abutting, which makes the overall structure and manufacturing of the battery module 10 simpler.

[0078] Referring to Figures 2 and 8, in some embodiments, the battery module 10 includes a first insulating member 310 and a second insulating member 320. The first insulating member 310 is located between the first support 212 and the first connecting portion 131, and the second insulating member 320 is located between the first support 212 and the second connecting portion 141. The first insulating member 310 provides insulation between the first support 212 and the first connecting portion 131, reducing the possibility of a short circuit between the first cell 211 and the first connecting portion 131 through contact. The second insulating member 320 provides insulation between the first support 212 and the second connecting portion 141, reducing the possibility of a short circuit between the first cell 211 and the second connecting portion 141 through contact.

[0079] In some embodiments, the first insulating member 310 is bonded to the first connecting portion 131 to reinforce the fixation of the first bracket 212 and the first connecting portion 131. In other embodiments, the first insulating member 310 is bonded to the first bracket 212, or the first insulating member 310 is bonded to both the first bracket 212 and the first connecting portion 131. Optionally, the first insulating member 310 comprises a polycarbonate film.

[0080] In some embodiments, the second insulating member 320 is bonded to the second connecting portion 141 to reinforce the fixation of the first bracket 212 and the second connecting portion 141. In other embodiments, the second insulating member 320 is bonded to the first bracket 212, or the second insulating member 320 is bonded to both the first bracket 212 and the second connecting portion 141. Optionally, the second insulating member 320 comprises a polycarbonate film.

[0081] Referring to Figure 5, in some embodiments, the first component 130 includes a first extension 132 connected to the first connecting portion 131. Along the third direction Z, the first bracket 212 and the first extension 132 are sequentially arranged. The first extension 132 is connected to the first bracket 212. The first extension 132 limits and fixes the first bracket 212 in the third direction Z.

[0082] In some embodiments, along the third direction Z, the first extension 132 and the first bracket 212 form a first gap W1. The first extension 132 limits the first bracket 212 within the length of the first gap W1, facilitating the installation of the first bracket 212 and the first extension 132.

[0083] In some embodiments, the length W1 of the first gap is 0.2mm-2mm, such as 0.2mm, 1mm, or 2mm. This facilitates the installation of the first bracket 212 and the first extension 132 while minimizing the range of motion of the first bracket 212.

[0084] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 is connected to the first extension 132.

[0085] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 forms a first gap W1 with the first extension 132.

[0086] In some embodiments, the first bracket 212 of a portion of the first cell unit 210 is connected to the first extension 132, and the first bracket 212 of the portion of the first cell unit 210 and the first extension 132 form a first gap W1.

[0087] In some embodiments, the second component 140 includes a second extension 142 connected to the second connecting portion 141, and the second extension 142 and the first bracket 212 are sequentially arranged along the third direction Z. The second extension 142 is connected to the first bracket 212. The second extension 142 limits and fixes the first bracket 212 in the third direction Z.

[0088] In some embodiments, along the third direction Z, the second extension 142 and the first bracket 212 form a second gap W2. The second extension 142 limits the first bracket 212 within the length of the second gap W2, facilitating the installation of the first bracket 212 and the second extension 142.

[0089] In some embodiments, the length of the second gap W2 is 0.2mm-2mm, such as 0.2mm, 1mm, or 2mm. This facilitates the installation of the first bracket 212 and the second extension 142 while minimizing the range of motion of the first bracket 212.

[0090] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 is connected to the second extension 142.

[0091] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 forms a second gap W2 with the second extension 142.

[0092] In some embodiments, the first support 212 of a portion of the first cell unit 210 is connected to the second extension 142, and the first support 212 of the portion of the first cell unit 210 and the second extension 142 form a second gap W2.

[0093] Referring to Figures 10 to 12, Figure 10 is a three-dimensional structural schematic diagram of a battery module provided in some other embodiments of this application; Figure 11 is an exploded structural schematic diagram of a battery module provided in some other embodiments of this application; and Figure 12 is a structural schematic diagram of a battery module provided in some other embodiments of this application from one perspective.

[0094] In some embodiments, the battery module 10 includes a first cover 410. Referring to FIG12, viewed along the second direction Y, the first cover 410 covers the first opening 101. The first cover 410 and each first cell 211 are spaced apart, forming a third gap 410a. A first channel 102 is formed between the first cover 410 and the second connecting portion 141, and the first channel 102 connects the third gap 410a and the outside of the battery module 10. The heat generated by the first cell 211 reaches the outside of the battery module 10 through the first opening 101, the first channel 102, and the third gap 410a. The first cell 211 dissipates heat quickly, reducing the possibility of the temperature of the first cell 211 continuously rising or even being ignited, reducing the possibility of excessive internal temperature and pressure inside the battery module 10, reducing the impact on other devices connected to the battery module 10, and improving the safety of the battery module 10.

[0095] Referring to Figure 12, a portion of the first cover 410 protrudes away from the first battery cell 211, forming a first channel 102 between the protruding portion and the second connecting portion 141. In some embodiments, the first cover 410 is an insulating member, serving to insulate and protect the first battery cell 211 from dust. Optionally, the first cover 410 comprises a polycarbonate film.

[0096] Referring to Figure 5, in some embodiments, the first component 130 includes two first fixing portions 133 extending from the first connecting portion 131, one of which is fixed to the first wall 110, and the other is fixed to the second wall 120. The connection strength between the first component 130 and the first wall 110 and the second wall 120 is higher, the overall structure of the battery module 10 is more stable, and the fixing and protection effect on the first cell 211 is better.

[0097] Referring to Figure 6, in some embodiments, the second component 140 includes two second fixing portions 143 extending from the second connecting portion 141, one of which is fixed to the first wall 110, and the other is fixed to the second wall 120. The connection strength between the second component 140 and the first wall 110 and the second wall 120 is higher, the overall structure of the battery module 10 is more stable, and the fixing and protection effect on the first cell 211 is better.

[0098] Referring to Figure 2, in some embodiments, the battery module 10 includes a third component 150 and a fourth component 160. The third component 150 is fixed to the first wall 110 and the second wall 120, respectively, and includes a third connecting portion 151 connected to the first bracket 212. The fourth component 160 and the third component 150 are spaced apart along a third direction Z. The fourth component 160 is fixed to the first wall 110 and the second wall 120, respectively, and includes a fourth connecting portion 161 connected to the first bracket 212. The third connecting portion 151 and the fourth connecting portion 161 are located on the same side of the first cell unit group 200.

[0099] In some embodiments, the third component 150 may be connected to the first support 212 of a portion of the first cell unit 210, or to the first support 212 of each first cell unit 210.

[0100] In some embodiments, the fourth component 160 may be connected to the first support 212 of a portion of the first cell unit 210, or to the first support 212 of each first cell unit 210.

[0101] The first wall 110, the second wall 120, the third component 150, and the fourth component 160 provide support for the first battery cell unit group 200. The third connecting part 151 is fixed to the first bracket 212, the fourth connecting part 161 is fixed to the first bracket 212, and the third component 150 and the fourth component 160 fix the first battery cell 211 through the first bracket 212. The fixing methods include, but are not limited to, snap-fit ​​fixing, screw fixing, adhesive bonding, and abutment fixing.

[0102] The first cell unit group 200 is fixed and supported by the first wall 110, the second wall 120, the third component 150, and the fourth component 160, which makes the overall structure of the battery module 10 simpler and the cost lower. The first cell 211 is fixed to the third component 150 and the fourth component 160 by the first bracket 212, which reduces the force on the first cell 211. The first bracket 212 plays a protective role for the first cell 211, reducing the possibility of damage to the first cell 211.

[0103] In some embodiments, the third component 150 and the fourth component 160 can be made of high-strength materials, such as steel, aluminum alloys and other metal materials, so that the third component 150 and the fourth component 160 have high stress performance, thereby reducing the possibility of deformation or damage to the third component 150 and the fourth component 160 due to stress or environmental changes, and thus making the battery module 10 more reliable.

[0104] In other embodiments, the third component 150 and the fourth component 160 may also be non-metallic materials with high strength, such as carbon fiber and rigid plastic.

[0105] Also see Figure 13, which is a structural schematic diagram of a battery module provided in some embodiments of this application from another perspective.

[0106] In some embodiments, referring to FIG13, when viewed in the opposite direction to the second direction Y, the first wall 110, the second wall 120, the third connection portion 131 and the fourth connection portion form a second opening 103, and a portion of each first cell 211 is located in the second opening 103.

[0107] Part of the first cell 211 is exposed through the second opening 103. The first cell 211 dissipates heat quickly, reducing the possibility that the temperature of the first cell 211 will continue to rise or even be ignited. This also reduces the possibility of excessive internal temperature and pressure in the battery module 10, reduces the impact on other devices connected to the battery module 10, and improves the safety of the battery module 10.

[0108] Referring to Figures 5, 6 and 8, in some embodiments, the first bracket 212 abuts against the third connecting portion 151 and the fourth connecting portion 161.

[0109] The third connecting part 151 and the fourth connecting part 161 fix the first bracket 212 by abutting, which makes the overall structure and manufacturing of the battery module 10 simpler.

[0110] Referring to Figures 2 and 8, in some embodiments, the battery module 10 includes a third insulating member 330 and a fourth insulating member 340. The third insulating member 330 is located between the first support 212 and the third connecting portion 151, and the fourth insulating member 340 is located between the first support 212 and the fourth connecting portion 161. The third insulating member 330 provides insulation between the first support 212 and the third connecting portion 151, reducing the possibility of a short circuit between the first cell 211 and the third connecting portion 151 through contact. The fourth insulating member 340 provides insulation between the first support 212 and the fourth connecting portion 161, reducing the possibility of a short circuit between the first cell 211 and the fourth connecting portion 161 through contact.

[0111] In some embodiments, the third insulating member 330 is bonded to the third connecting portion 151 to reinforce the fixation of the first bracket 212 and the third connecting portion 151. In other embodiments, the third insulating member 330 is bonded to the first bracket 212, or the third insulating member 330 is bonded to both the third connecting portion 151 and the first bracket 212. Optionally, the third insulating member 330 comprises a polycarbonate film.

[0112] In some embodiments, the fourth insulating member 340 is bonded to the fourth connecting portion 161 to reinforce the fixation of the first bracket 212 and the fourth connecting portion 161. In other embodiments, the fourth insulating member 340 is bonded to the first bracket 212, or the fourth insulating member 340 is bonded to both the fourth connecting portion 161 and the first bracket 212. Optionally, the fourth insulating member 340 comprises a polycarbonate film.

[0113] Referring to Figure 5, in some embodiments, the third component 150 includes a third extension 152 connected to the third connecting portion 151. Along the third direction Z, the first bracket 212 and the third extension 152 are sequentially arranged. The third extension 152 is connected to the first bracket 212. The third extension 152 limits and fixes the first bracket 212 in the third direction Z.

[0114] In some embodiments, the third component 150 is the same as the first structural component 130.

[0115] In some embodiments, along the third direction Z, the third extension 152 and the first bracket 212 form a fourth gap W4. The third extension 152 limits the first bracket 212 within the length of the fourth gap W4 and facilitates the installation of the first bracket 212 and the third extension 152.

[0116] In some embodiments, the length of the fourth gap W4 is 0.2mm-2mm, for example, 0.2mm, 1mm, or 2mm. This facilitates the installation of the first bracket 212 and the third extension 152 while minimizing the range of motion of the first bracket 212.

[0117] In some embodiments, the first support 212 of each first cell 210 in the first cell 200 is connected to the third extension 152.

[0118] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 forms a fourth gap W4 with the third extension 152.

[0119] In some embodiments, the first support 212 of a portion of the first cell unit 210 is connected to the third extension 152, and the first support 212 of the portion of the first cell unit 210 and the third extension 152 form a fourth gap W4.

[0120] In some embodiments, the fourth component 160 includes a fourth extension 162 connected to the fourth connecting portion 161. Along the third direction Z, the fourth extension 162 and the first bracket 212 are sequentially arranged. The fourth extension 162 is connected to the first bracket 212. The fourth extension 162 limits and fixes the first bracket 212 along the third direction Z.

[0121] In some embodiments, the fourth component 160 is the same as the second structural component 140.

[0122] In some embodiments, along the third direction Z, the fourth extension 162 and the first bracket 212 form a fifth gap W5. The fourth extension 162 limits the first bracket 212 within the length of the fifth gap W5 and facilitates the installation of the first bracket 212 and the fourth extension 162.

[0123] In some embodiments, the length of the fifth gap W5 is 0.2mm-2mm, for example, 0.2mm, 1mm, or 2mm. This facilitates the installation of the first bracket 212 and the fourth extension 162 while minimizing the range of motion of the first bracket 212.

[0124] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 is connected to the fourth extension 162.

[0125] In some embodiments, the first support 212 of each first cell unit 210 in the first cell unit group 200 forms a fifth gap W5 with the fourth extension 162.

[0126] In some embodiments, the first bracket 212 of a portion of the first cell unit 210 is connected to the fourth extension 162, and the first bracket 212 of the portion of the first cell unit 210 and the fourth extension 162 form a fifth gap W5.

[0127] Referring to Figures 10, 11, and 13, in some embodiments, the battery module 10 includes a second cover 420, which, when viewed in the opposite direction of the second direction Y, covers the second opening 103. The second cover 420 and each first cell 211 are spaced apart to form a sixth gap (not shown in the figures).

[0128] In some embodiments, a second channel is formed between the second cover 420 and the fourth connecting portion 161, the second channel connecting the sixth gap and the outside of the battery module 10. The heat generated by the first cell 211 reaches the outside of the battery module 10 through the second opening 103, the second channel, and the sixth gap. The first cell 211 dissipates heat quickly, reducing the possibility that the temperature of the first cell 211 will continue to rise or even be ignited, reducing the possibility that the internal temperature of the battery module 10 will be too high or the internal pressure will be too high, reducing the impact on other devices connected to the battery module 10, and improving the safety of the battery module 10.

[0129] Please refer to Figure 12. A portion of the second cover 420 protrudes away from the first cell 211, and a second channel is formed between the protruding portion and the fourth connection portion 161.

[0130] In some embodiments, the second cover 420 is an insulating element, serving to insulate and protect the first battery cell 211 from dust. Optionally, the second cover 420 comprises a polycarbonate film.

[0131] Referring to Figure 5, in some embodiments, the third component 150 includes two third fixing portions 153 extending from the third connecting portion 151, one of which is fixed to the first wall 110 and the other is fixed to the second wall 120. The connection strength between the third component 150 and the first wall 110 and the second wall 120 is higher, the overall structure of the battery module 10 is more stable, and the fixing and protection effect on the first cell 211 is better.

[0132] Referring to Figure 6, in some embodiments, the fourth component 160 includes two fourth fixing portions 163 extending from the fourth connecting portion 161, one of which is fixed to the first wall 110, and the other is fixed to the second wall 120. The connection strength between the fourth component 160 and the first wall 110 and the second wall 120 is higher, the overall structure of the battery module 10 is more stable, and the fixing and protection effect on the first cell 211 is better.

[0133] Referring to Figures 1, 4, 14 and 15, Figure 4 is a schematic diagram of the structure of the first battery cell provided in some embodiments of this application; Figure 15 is a schematic diagram of a partial structure of the battery module provided in some embodiments of this application.

[0134] In some embodiments, the first cell 211 includes a first cell housing 2111 and two first electrode terminals 2112, with the first electrode terminals 2112 extending from the first support 212. This ensures that when the first cell 211 is subjected to force, the first support 212 is subjected to force before the first electrode terminals 2112, reducing the possibility of the first electrode terminals 2112 being damaged by force.

[0135] Referring to Figure 14, the two first electrode terminals 2112 are located on opposite sides of the first cell 211. In other embodiments, the two first electrode terminals 2112 are located on the same side of the first cell 211.

[0136] Referring to Figure 15, in some embodiments, the first member 130 and the third member 150 are spaced apart along the second direction Y to form a third opening 104, and the second member 140 and the fourth member 160 are spaced apart along the second direction Y to form a fourth opening 105. A portion of the first electrode terminal 2112 is located within the third opening 104 and / or the fourth opening 105.

[0137] The heat generated by the first cell 211 is dissipated through the third opening 104 and / or the fourth opening 105. The heat dissipation speed of the first cell 211 is faster, which reduces the possibility that the temperature of the first cell 211 will continue to rise or even be ignited, reduces the possibility that the internal temperature of the battery module 10 is too high or the internal pressure is too high, reduces the impact on other devices connected to the battery module 10, and improves the safety of the battery module 10.

[0138] In some embodiments, the first bracket 212 and the first battery cell 211 are integrally formed. This improves the connection strength between the first bracket 212 and the first battery cell 211. Integral forming means that the first bracket 212 and the first battery cell 211 are directly fixed together. Methods for integral forming include, but are not limited to, potting processes and injection molding processes.

[0139] In other embodiments, the connection method between the first bracket 212 and the first battery cell 211 includes, but is not limited to, assembly, spraying, etc.

[0140] In some embodiments, each first bracket 212 is integrally formed with a first battery cell 211.

[0141] In other embodiments, each first bracket 212 can be integrally formed with multiple first cells 211 to improve the manufacturing efficiency of the battery module 10.

[0142] In some embodiments, the first cell 211 includes a first cell housing 2111 and two first electrode terminals 2112. The first cell housing 2111 includes a first main body portion 2111a and two first sealing portions 2111b. The first electrode terminals 2112 extend from the first sealing portions 2111b out of the cell housing 2111. A first bracket 212 is connected to the first main body portion 2111a and each of the first sealing portions 2111b.

[0143] In some embodiments, the first cell housing 2111 includes an aluminum-plastic film, and the first cell 211 includes a pouch cell.

[0144] In some embodiments, the battery module 10 includes a first elastic member 430 located between the first wall 110 and the first cell unit group 200, the first elastic member 430 abutting against the first wall 110 and the first cell unit group 200. The first elastic member 430 is configured to provide expansion space for the first cell 211.

[0145] Referring to Figure 16, Figure 16 is a schematic diagram of the structure of the first wall of a battery module provided in some embodiments of this application.

[0146] In some embodiments, the first wall 110 includes a first rear wall 112 and a first front wall 111 spaced apart along a first direction X, and a first upper wall 113 and a first lower wall 114 spaced apart along a second direction Y. The first front wall 111, the first rear wall 112, the first upper wall 113 and the first lower wall 114 are connected to form a cavity 106.

[0147] In some embodiments, the first lower wall 114 has a first hole 107 communicating with the first cavity 106, and the first fixing part 133 passes through the first hole 107 and is located in the cavity 106. The first front wall 111 has a first fixing hole 108, and the first fixing part 133 has a second fixing hole 1331. The battery module 10 includes a fixing member (not shown in the figure), which passes through the first fixing hole 108 and the second fixing hole 1331 to fix the first fixing part 133 and the first front wall 111. The first component 130 does not protrude from the first wall 110, and the first wall 110 is less likely to have a stress concentration point when subjected to external force, which helps to reduce the space occupied by the battery module 10. The fixing member includes, but is not limited to, screws.

[0148] In some embodiments, the fixing method of the second fixing part 143 and the first wall 110 is the same as that of the first fixing part 133 and the first front wall 111. In some embodiments, the third fixing part 153 is located in the cavity 106 and is fixed to the first front wall 111.

[0149] In some embodiments, the fourth fixing part 163 is located in the cavity 106 and is fixed to the first front wall 111.

[0150] Referring to Figures 2, 4, 7, and 8, in some embodiments, the battery module 10 includes a second cell unit group 500 located between a first wall 110 and a second wall 120. The first cell unit group 200 and the second cell unit group 500 are spaced apart along a third direction Z. The second cell unit group 500 includes a plurality of second cell units 510 arranged along a first direction X. Each second cell unit 510 includes a second cell 511 and a second bracket 512 fixed to the second cell 511.

[0151] The battery module 10 includes a fifth component 170 and a sixth component 180. The fifth component 170 is fixed to the first wall 110 and the second wall 120, respectively. The fifth component 170 includes a fifth connecting portion 171 connected to the second bracket 412. The sixth component 180 and the fifth component 130 are spaced apart along a third direction Z. The sixth component 180 is fixed to the first wall 110 and the second wall 120, respectively. The sixth component 180 includes a sixth connecting portion 181 connected to the second bracket 412. The fifth connecting portion 171 and the sixth connecting portion 181 are located on the same side of the first cell unit group 200.

[0152] In some embodiments, the fifth component 170 may be connected to the second support 512 of a portion of the second cell unit 510, or to the second support 512 of each second cell unit 510.

[0153] In some embodiments, the sixth component 180 may be connected to the second support 512 of a portion of the second cell unit 510, or to the second support 512 of each second cell unit 510.

[0154] The first wall 110, the second wall 120, the fifth component 170, and the sixth component 180 provide support for the second battery cell unit group 500. The fifth connecting part 171 is fixed to the second bracket 412, the sixth connecting part 181 is fixed to the second bracket 412, and the fifth component 170 and the sixth component 180 fix the second battery cell 511 through the second bracket 512. The fixing methods include, but are not limited to, snap-fit ​​fixing, screw fixing, and welding.

[0155] The second cell unit group 500 is fixed and supported by the first wall 110 and the second wall 120, the fifth component 170 and the sixth component 180, which makes the overall structure of the battery module 10 simpler and the cost lower. The second cell 511 is fixed to the fifth component 170 and the sixth component 180 by the second bracket 512, which reduces the stress on the second cell 511. The second bracket 512 plays a protective role for the second cell 511, reducing the possibility of damage to the second cell 511.

[0156] In some embodiments, referring to FIG7, when viewed along the second direction Y, the first wall 110, the second wall 120, the fifth connection portion and the sixth connection portion form a fifth opening 109, and a portion of each second cell 511 is located in the fifth opening 109.

[0157] Part of the second cell 511 is exposed through the fifth opening 109. The second cell 511 dissipates heat quickly, reducing the possibility that the temperature of the second cell 511 will continue to rise or even be ignited. This also reduces the possibility of excessive internal temperature and pressure in the battery module 10, reduces the impact on other devices connected to the battery module 10, and improves the safety of the battery module 10.

[0158] In some embodiments, the fifth component 170 has the same structure as the second component 140, and the sixth component 180 has the same structure as the first component 130.

[0159] In some embodiments, the first component 130 and the sixth component 180 are connected by a first connector 130a.

[0160] In some embodiments, the battery module 10 includes a seventh component 190 and an eighth component 1100. The seventh component 190 is fixed to the first wall 110 and the second wall 120, respectively, and includes a seventh connecting portion 191 connected to the second bracket 512. The eighth component 1100 and the seventh component 190 are spaced apart along a third direction Z. The eighth component 1100 is fixed to the first wall 110 and the second wall 120, respectively, and includes an eighth connecting portion 1101 connected to the second bracket 512. The seventh connecting portion 191 and the eighth connecting portion 1101 are located on the same side of the second cell unit group 500.

[0161] The first wall 110, the second wall 120, the seventh component 190, and the eighth component 1100 provide support for the second battery cell unit group 500. The seventh component 190 and the eighth component 1100 fix the second battery cell 511 through the second bracket 512. The fixing methods include, but are not limited to, snap-fit ​​fixing, screw fixing, and welding.

[0162] The second cell unit group 500 is fixed and supported by the first wall 110 and the second wall 120, the seventh component 190 and the eighth component 1100, which makes the overall structure of the battery module 10 simpler and the cost lower. The second cell 511 is fixed to the seventh component 190 and the eighth component 1100 by the second bracket 512, which reduces the stress on the second cell 511. The second bracket 512 plays a protective role for the second cell 511, reducing the possibility of damage to the second cell 511.

[0163] In some embodiments, the seventh component 190 has the same structure as the second component 140, and the eighth component 1100 has the same structure as the first component 130.

[0164] In some embodiments, the third component 150 and the eighth component 1100 are connected by a second connector 150a.

[0165] Referring to Figures 17 to 19, Figure 17 is a three-dimensional structural schematic diagram of an energy storage device provided in some embodiments of this application; Figure 18 is a three-dimensional schematic diagram of a partial structure of an energy storage device provided in some embodiments of this application; and Figure 19 is a partially enlarged structural schematic diagram of point B of the energy storage device in Figure 17.

[0166] This application provides an energy storage device, including at least one battery module 10 provided in any of the above embodiments.

[0167] In some embodiments, the energy storage device includes a housing 20 and a plurality of battery modules 10, which are spaced apart along a second direction Y. The plurality of battery modules 10 are located within the housing 20. The housing 20 includes a top wall 20a and a bottom wall 20b, and each battery module 10 is connected to the bottom wall 20b.

[0168] In some embodiments, the first direction X is the direction of gravity.

[0169] In some embodiments, the first wall 110 or the second wall 120 can be fixed to the bottom wall 20b by means of snap-fit ​​fixing, screw fixing, welding, etc.

[0170] In some embodiments, the energy storage device includes a plurality of first partitions 20c disposed on the bottom wall 20b and a plurality of second partitions 20d disposed on the top wall 20a, with a portion of each battery module 10 disposed on an adjacent first partition 20c and a portion of each battery module 10 disposed on an adjacent second partition 20d.

[0171] In some embodiments, each battery module 10 abuts against two first partitions 20c, such that the two first partitions 20c clamp the battery module 10, reducing the possibility of the battery module 10 shaking inside the housing 20, making the energy storage device more stable.

[0172] In some embodiments, each battery module 10 abuts against two second partitions 20d, such that the two second partitions 20d clamp the battery module 10, reducing the possibility of the battery module 10 shaking inside the housing 20, making the energy storage device more stable.

[0173] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0174] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized in that, include: The first wall and the second wall are spaced apart along the first direction; A first battery cell unit group is located between the first wall and the second wall. The first battery cell unit group includes a plurality of first battery cell units arranged along the first direction. The first battery cell unit includes a first battery cell and a first bracket fixed to the first battery cell. A first component is fixed to the first wall and the second wall respectively; the first component includes a first connecting portion connected to the first bracket. The second component is spaced apart from the first component along a third direction, and the second component is fixed to the first wall and the second wall respectively; the second component includes a second connecting part connected to the first bracket, and the first connecting part and the second connecting part are located on the same side of the first cell unit group; The first direction is perpendicular to the third direction.

2. The battery module according to claim 1, characterized in that, Viewed along the second direction, the first wall, the second wall, the first connecting portion, and the second connecting portion form a first opening, and a portion of each of the first cells is located in the first opening; The first direction, the second direction, and the third direction are perpendicular to each other.

3. The battery module according to claim 1 or 2, characterized in that, The first bracket abuts against the first connecting part and the second connecting part.

4. The battery module according to any one of claims 1-3, characterized in that, The battery module includes a first insulating component and a second insulating component. The first insulating component is located between the first bracket and the first connecting portion, and the second insulating component is located between the first bracket and the second connecting portion.

5. The battery module according to any one of claims 1-4, characterized in that, The first component includes a first extension connected to the first connecting portion; Along the third direction, the first bracket and the first extension are arranged sequentially. The first extension is connected to the first bracket, or the first extension and the first bracket form a first gap. The length of the first gap is W1, 0.2mm≤W1≤2mm.

6. The battery module according to claim 5, characterized in that, The second component includes a second extension connected to the second connecting portion; Along a third direction, the second extension and the first bracket are arranged sequentially. The second extension is connected to the first bracket, or the second extension and the first bracket form a second gap. The length of the second gap is W2, 0.2mm≤W2≤2mm.

7. According to any one of claims 1-6, the battery module includes a first cover, which, when viewed along a second direction, covers the first opening; the first cover and each of the first battery cells are spaced apart to form a third gap; A first channel is formed between the first cover and the second connecting portion, and the first channel connects the third gap and the outside of the battery module.

8. The battery module according to any one of claims 1-7, characterized in that, The first component includes two first fixing parts extending from the first connecting portion, one of which is fixed to the first wall and the other of which is fixed to the second wall; The second component includes two second fixing parts extending from the second connecting part, one of which is fixed to the first wall and the other of which is fixed to the second wall.

9. The battery module according to any one of claims 1-8, characterized in that, The battery module includes: A third component is fixed to the first wall and the second wall respectively, and the third component includes a third connecting portion connected to the first bracket; The fourth component and the third component are spaced apart along the third direction. The fourth component is fixed to the first wall and the second wall respectively. The fourth component includes a fourth connecting part connected to the first bracket. The third connecting part and the fourth connecting part are located on the same side of the first cell unit group. Viewed in the opposite direction to the second direction, the first wall, the second wall, the third connecting portion, and the fourth connecting portion form a second opening, with a portion of each of the first cells located in the second opening.

10. The battery module according to claim 9, characterized in that, The first bracket abuts against the third connecting part and the fourth connecting part.

11. The battery module according to claim 9 or 10, characterized in that, The battery module includes a third insulating component and a fourth insulating component. The third insulating component is located between the first bracket and the third connecting portion, and the fourth insulating component is located between the first bracket and the fourth connecting portion.

12. The battery module according to any one of claims 9-11, characterized in that, The third component includes a third extension connected to the third connecting portion; Along the third direction, the first bracket and the third extension are arranged sequentially, the third extension is connected to the first bracket, or the third extension and the first bracket form a fourth gap, the length of the fourth gap is W4, 0.2mm≤W4≤2mm.

13. The battery module according to claim 12, characterized in that, The fourth component includes a fourth extension connected to the fourth connecting portion; Along a third direction, the fourth extension and the first bracket are arranged sequentially. The fourth extension is connected to the first bracket, or the fourth extension and the first bracket form a fifth gap. The length of the fifth gap is W5, 0.2mm≤W5≤2mm.

14. The battery module according to any one of claims 9-13, characterized in that, The third component includes two third fixing parts extending from the third connecting part, one of the third fixing parts being fixed to the first wall and the other third fixing part being fixed to the second wall; The fourth component includes two fourth fixing parts extending from the fourth connecting part, one of which is fixed to the first wall and the other of which is fixed to the second wall.

15. The battery module according to any one of claims 8-13, characterized in that, The first component and the third component form a third opening, and the second component and the fourth component form a fourth opening; The first cell includes two electrode terminals that extend from the first bracket, and portions of the electrode terminals are located within the third opening and / or the fourth opening.

16. The battery module according to any one of claims 1-15, characterized in that, The first bracket and the first battery cell are integrally formed.

17. The battery module according to claim 16, characterized in that, The first battery cell includes a first battery cell housing and two first electrode terminals. The first battery cell housing includes a first main body and two first sealing portions. The first electrode terminals extend from the first sealing portions out of the battery cell housing. The first bracket is connected to the first main body and each first sealing part.

18. The battery module according to any one of claims 1-17, characterized in that, The battery module includes a first elastic member, which is located between the first wall and the first cell unit group, and the first elastic member abuts against the first wall and the first cell unit group. The first elastic element is configured to provide expansion space for the first battery cell.

19. The battery module according to any one of claims 1-18, characterized in that, The battery module includes: The second battery cell unit group is located between the first wall and the second wall, and the first battery cell unit group and the second battery cell unit group are spaced apart along the third direction; the second battery cell unit group includes a plurality of second battery cell units arranged along the first direction; the second battery cell unit includes a second battery cell and a second bracket fixed to the second battery cell; A fifth component is fixed to both the first wall and the second wall; the fifth component includes a fifth connecting portion connected to the second bracket. A sixth component and the fifth component are spaced apart along a third direction. The sixth component is fixed to the first wall and the second wall respectively. The sixth component includes a sixth connecting part connected to the second bracket. The fifth connecting part and the sixth connecting part are located on the same side of the first cell unit group. Viewed along the second direction, the first wall, the second wall, the fifth connecting portion, and the sixth connecting portion form a fifth opening, and a portion of each of the second cells is located in the fifth opening.

20. The battery module according to claim 19, characterized in that, The first component and the sixth component are connected by a first connector.

21. An energy storage device, characterized in that, It includes at least one battery module as described in any one of claims 1-20.

22. The energy storage device according to claim 21, characterized in that, The energy storage device includes a housing and multiple battery modules, which are spaced apart along the second direction; the multiple battery modules are located inside the housing. The outer casing includes a top wall and a bottom wall, and each battery module is connected to the bottom wall in the first direction, which is the direction of gravity.

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