Support assembly and battery module

Abstract

The utility model provides a bracket assembly and a battery module. The bracket assembly comprises: an aluminum bar; the first bracket is configured to fix the battery cell; wherein the first bracket is integrally connected with the aluminum bar. According to the support assembly, the aluminum row and the first support are integrally connected, the first support is used for fixing the battery cells, after the battery cells are stacked and the first support is fixed, the aluminum row integrally connected with the first support is aligned with the battery cells, and finally welding is directly carried out. And the aluminum rows do not need to be aligned and placed at the corresponding positions of the battery cells one by one, so that the assembly efficiency of the battery module is improved, and meanwhile, the problem that the battery cells fail due to the fact that the aluminum rows are not aligned with the battery cells is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a bracket assembly and a battery module. Background Art

[0002] In the production process of existing battery modules, it is necessary to weld the aluminum busbar to the battery cells. Before welding, the aluminum busbar needs to be fixed on the battery cells. However, the fixing operation requires placing the aluminum busbars one by one at the corresponding positions of the battery cells, and there may also be problems with inaccurate placement positions, which may ultimately lead to the failure of the battery cells. Summary of the Utility Model

[0003] An embodiment of the utility model provides a bracket assembly and a battery module, which can solve the above-mentioned problems.

[0004] In a first aspect, an embodiment of the utility model provides a bracket assembly, which includes:

[0005] An aluminum busbar; and

[0006] A first bracket configured to fix the battery cells;

[0007] Wherein, the first bracket is integrally connected to the aluminum busbar.

[0008] In one embodiment, the first bracket is provided with a plurality of mounting holes, and the pole columns of a plurality of battery cells are respectively received in the plurality of mounting holes, and one aluminum busbar is connected to the pole columns of at least one battery cell.

[0009] In one embodiment, the first bracket is provided with a plurality of first battery cell mounting grooves extending in a first direction and arranged at intervals in a second direction, and the first battery cell mounting grooves correspond to and communicate with at least one mounting hole;

[0010] One ends of a plurality of battery cells having terminals in a third direction are respectively located in the plurality of first battery cell mounting grooves.

[0011] In one embodiment, convex platforms are arranged at the edges of each hole at one end of the plurality of mounting holes away from the first battery cell mounting grooves, and the convex platforms are arranged around the mounting holes and are configured to limit the aluminum busbar.

[0012] In one embodiment, the convex platform is arc-shaped, and a protruding portion is provided at the end of the convex platform, and the aluminum busbar is fixed on the protruding portion.

[0013] In one embodiment, at least one convex platform is configured to limit one aluminum busbar;

[0014] The convex platform is located at at least one end of the aluminum busbar in the second direction, and at least one end of the aluminum busbar is in contact with the corresponding convex platform.

[0015] In one embodiment, the bracket assembly further includes a second bracket located on one side of the first bracket, and the second bracket cooperates with the first bracket to fix the battery cell.

[0016] In one embodiment, the second bracket is further provided with a plurality of second battery cell mounting grooves extending in a first direction and arranged at intervals in a second direction. The second battery cell mounting grooves are arranged in one-to-one correspondence with the first battery cell mounting grooves, and one end of the battery cell away from the pole in a third direction is fixed in the second battery cell mounting groove.

[0017] In a second aspect, an embodiment of the present invention provides a battery module, including the bracket assembly according to any one of the first aspect and a plurality of battery cells. The battery cells are fixed in the bracket assembly, and the pole columns of the battery cells are connected to the aluminum busbars of the bracket assembly.

[0018] In one embodiment, one end of the battery cell having the pole column is fixed in the first battery cell mounting groove, and one end of the battery cell away from the pole column is fixed in the second battery cell mounting groove of the bracket assembly.

[0019] In one embodiment, the battery module further includes two protective plates arranged between the first bracket and the second bracket and oppositely arranged along the second direction;

[0020] A plurality of battery cells are located between the two protective plates.

[0021] In one embodiment, the battery module further includes a fastening band arranged between the first bracket and the second bracket and surrounding the two protective plates.

[0022] The present invention designs a bracket assembly. By integrally connecting the aluminum busbar with the first bracket, the first bracket is used to fix the battery cells. After the battery cells are stacked, after fixing the first bracket, the aluminum busbar integrally connected with the first bracket is aligned with the battery cells, and finally, direct welding can be performed, without the need to align the aluminum busbars one by one and place them at the corresponding positions of the battery cells, improving the assembly efficiency of the battery module and also avoiding the problem that the battery cells fail due to the misalignment of the aluminum busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of a battery module provided by an embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of a battery cell provided by an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the first bracket structure provided by an embodiment of the present utility model;

[0027] Figure 4 Schematic diagram of the first bracket structure provided by an embodiment of the present utility model;

[0028] Figure 5 Schematic diagram of the second bracket structure provided by an embodiment of the present utility model;

[0029] Figure 6 Schematic diagram of the first bracket structure provided by an embodiment of the present utility model;

[0030] Figure 7 Schematic diagram of the protective plate structure provided by an embodiment of the present utility model;

[0031] Explanation of reference numerals: 1000, battery module; 1011, battery cell; 1020, bracket assembly; 1021, first bracket; 1022, aluminum busbar; 1023, mounting hole; 1024, pole; 1025, boss; 1026, protruding part; 1030, second bracket; 1031, second battery cell mounting groove; 1032, first battery cell mounting groove; 1040, protective plate; 1050, fastening band. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0033] In the production process of existing battery modules, it is necessary to weld the aluminum busbar to the battery cell. This process often requires first fixing the aluminum busbar on the battery cell and then welding between the aluminum busbar and the battery cell. However, this fixing process is time-consuming and laborious, ultimately resulting in a slow production efficiency of the battery module.

[0034] Based on the above problems, the present utility model proposes a battery module, which includes a bracket assembly and a plurality of battery cells. The battery cells are fixed in the bracket assembly, and the poles of the battery cells are connected to the aluminum busbars of the bracket assembly. Please refer toFigure 1 and Figure 2 , Figure 1 is a schematic structural view of a battery module provided by an embodiment of the present invention, Figure 2 is a schematic structural view of a battery cell provided by an embodiment of the present invention. The battery module 1000 includes: a bracket assembly 1020 and a plurality of battery cells 1011. Among them, the bracket assembly 1020 includes: a first bracket 1021 and an aluminum row 1022. The first bracket 1021 is configured to fix the battery cells 1011, and the aluminum row 1022 is integrally connected to the first bracket 1021. The bracket assembly 1020 is located on one side of the plurality of battery cells 1011, and one aluminum row 1022 is correspondingly connected to at least one battery cell 1011. It should be noted that the above-mentioned integral connection of the aluminum row 1022 and the first bracket 1021 means that during the production process, the aluminum row 1022 and the first bracket 1021 are injection-molded into one body and are inseparable. In this embodiment, by integrally connecting the aluminum row 1022 and the first bracket 1021, on the one hand, after the aluminum row 1022 is fixed at a specific position on the first bracket 1021 after being formed and fixed in the injection mold, there is no need to position and place the aluminum row 1022 again. And at this time, the position of the aluminum row 1022 corresponds to the connection of the battery cell 1011, avoiding the problem of misalignment of the aluminum row 1022 with the battery cell 1011 when placing it. On the other hand, by integrally connecting the aluminum row 1022 and the first bracket 1021 to fix the aluminum row 1022, there is no need to add additional fixing structures (such as glue, buckles, etc.). At the same time, by fixing the aluminum row 1022 at a specific position on the first bracket 1021, there is a specific interval between the plurality of aluminum rows 1022. Only need to place the plurality of battery cells 1011 according to this specific interval, and then place the bracket assembly 1020 opposite to the plurality of battery cells 1011, then the aluminum row 1022 can be automatically aligned with the pole column 1024 on the battery cell 1011, and finally direct welding can be performed. Compared with the prior art of manually fixing the aluminum row 1022 to the corresponding position of the battery cell 1011 one by one, the solution of the present application improves the assembly efficiency of the battery module 1000 and reduces the time cost during the production process of the battery module 1000.

[0035] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 , Figure 3Schematic diagram of the first bracket structure provided by the embodiment of the present utility model. A plurality of mounting holes 1023 are provided on the first bracket 1021, and the pole columns 1024 of a plurality of battery cells 1011 are respectively received in the plurality of mounting holes 1023. An aluminum busbar 1022 is connected to the pole columns 1024 of at least one battery cell 1011. Specifically, an aluminum busbar 1022 is connected to the pole columns 1024 of at least one battery cell 1011 through the mounting holes 1023 provided on the first bracket 1021. Among them, a part of the aluminum busbar 1022 is respectively connected to the positive pole column 1024 of one battery cell 1011 and the negative pole column 1024 of another battery cell 1011 through the mounting holes 1023, and a part of the aluminum busbar 1022 is connected to the positive pole column 1024 or the negative pole column 1024 of one battery cell 1011 through the mounting holes 1023.

[0036] It should be noted that the first direction described in the embodiment of the present utility model is all Figure 1 the X direction in Figure 1 , the second direction described in the embodiment of the present utility model is all Figure 1 the Y direction in

[0037] In some embodiments, please refer to Figure 6 Figure 6 Schematic diagram of the structure of the first bracket 1021 provided by the embodiment of the present utility model. The first bracket 1021 further includes a plurality of first battery cell mounting grooves 1032 extending in the first direction and arranged at intervals in the second direction. The first battery cell mounting grooves 1032 correspond to and communicate with at least one mounting hole 1023. The ends of a plurality of battery cells 1011 having pole columns 1024 in the third direction are respectively located in the plurality of first battery cell mounting grooves 1032.

[0038] In some embodiments, a boss 1025 is provided at the edge of each hole at the end of the plurality of mounting holes 1023 far from the first battery cell mounting groove 1032. The boss 1025 is arranged around the mounting hole 1023 and is configured to limit the aluminum busbar 1022. The boss 1025 is used to fix the aluminum busbar 1022 and prevent the aluminum busbar 1022 from moving in the first direction or the second direction. In this embodiment, by providing a plurality of mounting holes 1023 on the first bracket 1021 and simultaneously providing bosses 1025 at the edges of each mounting hole 1023, the dislocation of the aluminum busbar 1022 caused by shaking is prevented, and the stability of the connection between the aluminum busbar 1022 and the battery cell 1011 is ensured.

[0039] Furthermore, in some embodiments, please refer to Figure 3 Figure 4 Figure 4 ​​​Schematic diagram of the structure of the first bracket 1021 provided by the embodiment of the present utility model. The boss 1025 is arc-shaped, and a protruding portion 1026 is provided at the end of the boss 1025. The aluminum row 1022 is fixed on the protruding portion 1026. Specifically, a protruding portion 1026 that bends and extends along the first direction is provided at the end of the boss 1025, and this protruding portion 1026 is used to fix the aluminum row 1022 to prevent the aluminum row 1022 from moving in the third direction. In this embodiment, by providing the protruding portion 1026 at the end of the boss 1025, the stability of the connection between the aluminum row 1022 and the battery cell 1011 is ensured.

[0040] In some embodiments, at least one boss 1025 is configured to limit one aluminum row 1022. The boss 1025 is located at at least one end of the aluminum row 1022 in the second direction, and at least one end of the aluminum row 1022 is in contact with the corresponding boss 1025. It can be understood that the above examples of the shape of the boss 1025 are only for more clearly and comprehensively showing the core idea and method of the present utility model to better understand the implementation manner of the present utility model, and by no means limit the scope of the present utility model. Any obvious modification or equivalent replacement made without departing from the essence of the idea of the present utility model should be regarded as within the protection scope of the present utility model.

[0041] In some embodiments, please refer to Figure 1 and Figure 5 , Figure 5 Schematic diagram of the structure of the second bracket 1030 provided by the embodiment of the present utility model. The battery module 1000 further includes a second bracket 1030. The second bracket 1030 is located on one side of the first bracket 1021, and the second bracket 1030 cooperates with the first bracket 1021 to fix the battery cell 1011. Specifically, the second bracket 1030 is located on the side of the plurality of battery cells 1011 away from the bracket assembly 1020.

[0042] Further, in some embodiments, the second bracket 1030 is provided with a plurality of second battery cell mounting grooves 1031 extending in the first direction and arranged at intervals in the second direction. The second battery cell mounting grooves 1031 are arranged in one-to-one correspondence with the first battery cell mounting grooves 1032. One end of the battery cell 1011 away from the pole 1024 in the third direction is fixed in the second battery cell mounting groove 1031. And each second battery cell mounting groove 1031 is configured to mount one battery cell 1011, wherein the first direction intersects with the second direction. Specifically, in the third direction, a plurality of battery cells 1011 are located between the first bracket 1021 and the second bracket 1030. The second bracket 1030 is provided with a plurality of second battery cell mounting grooves 1031 for fixedly mounting a plurality of battery cells 1011, and the battery cells 1011 do not need to be pasted with foam or glued. In this embodiment, by providing a plurality of second battery cell mounting grooves 1031 on the second bracket 1030 and arranging the plurality of second battery cell mounting grooves 1031 at intervals, the battery cells 1011 mounted in each second battery cell mounting groove 1031 are fixedly spaced apart, avoiding the problem that the battery cells 1011 move in the first direction or the second direction due to the absence of the second battery cell mounting grooves 1031 on the second bracket 1030 during the shaking of the battery module 1000, and finally the connection between the aluminum row 1022 and the battery cells 1011 is unstable, resulting in battery failure.

[0043] It can be understood that the structure of the battery cells 1011 installed in the second battery cell mounting grooves 1031 is not limited in the solution of the present application. It can be a cylindrical battery, a rectangular battery, or other types of batteries. Correspondingly, the specific groove shape of the second battery cell mounting grooves 1031 is not limited in the solution of the present application, and can be modified and set according to the structure of the actually installed battery cells 1011. In all embodiments of the present application, taking the battery cell 1011 as a rectangular battery structure as an example, the second battery cell mounting groove 1031 is also set as a rectangular groove suitable for the structure of the battery cell 1011 to facilitate the assembly of the battery cell 1011.

[0044] The mounting holes 1023 on the first bracket 1021 correspond to the positions of the second battery cell mounting grooves 1031 one by one. Both ends of the battery cell 1011 in the third direction are respectively located in the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032, that is, both ends of the battery cell 1011 in the third direction are respectively embedded into the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032. In this embodiment, by providing a plurality of first battery cell mounting grooves 1032 on the first bracket 1021, and the first battery cell mounting grooves 1032 corresponding to the mounting holes 1023 one by one and corresponding to the positions of the second battery cell mounting grooves 1031 one by one, it is ensured that both ends of the battery cell 1011 in the third direction will not move in the first direction, the second direction, and the third direction during the shaking of the battery module 1000. Therefore, the relative position between the battery cell 1011 and the aluminum row 1022 is always stable, avoiding the problem that the battery module 1000 fails due to the unstable connection between the battery cell 1011 and the aluminum row 1022.

[0045] It should be noted that the above-mentioned first direction intersects with the second direction, but no limitation is imposed on the included angle between the first direction and the second direction. It can be 90°, it can be 60°, or any other known angle. In a preferred embodiment of the present invention, the included angle between the first direction and the second direction is set to 90°.

[0046] Furthermore, in some embodiments, the mounting holes 1023 on the first bracket 1021 are opposite to the positions of the second battery cell mounting grooves 1031, and the first bracket 1021 cooperates with the second bracket 1030 to limit a plurality of battery cells 1011. In this embodiment, by using the cooperation between the second bracket 1030 and the first bracket 1021, and making the mounting holes 1023 correspond to the positions of the second battery cell mounting grooves 1031 one by one, each battery cell 1011 installed in the second battery cell mounting groove 1031 is fixed, increasing the stability of the battery cell 1011 during the shaking of the battery module 1000.

[0047] In some embodiments, at least part of the side walls of the second battery cell mounting groove 1031 and / or the first battery cell mounting groove 1032 are in contact with the circumferential side of the battery cell 1011. Among them, at least part of the side walls of the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032 are in contact with the circumferential side of the battery cell 1011, that is, the side walls of the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032 can completely surround and contact the circumferential side of the battery cell 1011, or part of the side walls surround and contact the side walls of the battery cell 1011, and the battery cell 1011 is limited in the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032 through the mutual contact of surfaces. Similarly, each battery cell 1011 has two opposite sides in the first direction and the second direction respectively. When the battery cell 1011 is installed in the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032, the four surfaces of the circumferential side of the battery cell 1011 are in contact with the groove side walls of the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032 respectively, so that the battery cell 1011 is limited and fixed in the plane direction of the second battery cell mounting groove 1031 and the first battery cell mounting groove 1032, that is, when disassembling and assembling between the battery cell 1011 and the first bracket 1021, the battery cell 1011 or the first bracket 1021 can only be moved in the third direction.

[0048] In this embodiment, when the battery cell 1011 is installed in the corresponding second battery cell mounting groove 1031 and the first battery cell mounting groove 1032, the side walls of the second battery cell mounting groove 1031 and / or the first battery cell mounting groove 1032 are directly used to limit the circumferential side of the battery cell 1011. For example, the side walls of the second battery cell mounting groove 1031 and / or the first battery cell mounting groove 1032 are arranged with clearance fit with the circumferential side of the battery cell 1011, so that the battery cell 1011 can be relatively fixedly installed on the second bracket 1030 without pasting foam or gluing, improving the convenience of installing the battery cell 1011.

[0049] In some embodiments, the first bracket 1021 is a plastic first bracket 1021, and / or the second bracket 1030 is a plastic second bracket 1030. That is, at least one of the first bracket 1021 and the second bracket 1030 is set as a plastic part. In a specific embodiment, both the first bracket 1021 and the second bracket 1030 are set as plastic parts, because the plastic parts can be formed by mold opening or machining, so that the finished product structure sizes of the first bracket 1021 and the second bracket 1030 are the same, and at the same time, it can also ensure that the distances between adjacent two battery cells 1011 are the same when a plurality of battery cells 1011 are arranged between the first bracket 1021 and the second bracket 1030.

[0050] In some embodiments, on the basis that the first bracket 1021 and the second bracket 1030 limit the bottom and the top of the plurality of battery cells 1011 in the third direction, please refer to Figure 1 and Figure 7 , Figure 7 which is a schematic structural view of the protection plate provided by an embodiment of the present invention. The battery module 1000 further includes two protection plates 1040. The two protection plates 1040 are disposed between the second bracket 1030 and the first bracket 1021 and are oppositely disposed along the second direction, and the plurality of battery cells 1011 are located between the two protection plates 1040. Specifically, the two protection plates 1040 are respectively disposed at two ends of the plurality of battery cells 1011 in the second direction, so as to reinforce the assembly among the first bracket 1021, the plurality of battery cells 1011 and the second bracket 1030, and at the same time protect the plurality of battery cells 1011 among the plurality of battery cells 1011.

[0051] Further, on the basis that the battery module 1000 includes two protection plates 1040, in some embodiments, please refer to Figure 1 , the battery module 1000 further includes a fastening band 1050. The fastening band 1050 is disposed between the second bracket 1030 and the first bracket 1021 and is disposed around the two protection plates 1040. By providing the fastening band 1050, the protection plate 1040 is limited and fixed, and at the same time, the protection plate 1040 and the fastening band 1050 cooperate with each other, so that the whole battery module 1000 is more fixed and reliable. It can be understood that the number of the fastening bands 1050 is not limited, and can be one or more. In this embodiment, the battery module 1000 is provided with two fastening bands 1050, and the two fastening bands 1050 are spaced apart along the third direction. Among them, the material of the fastening band 1050 is not limited, and can be a plastic material or a metal material. In a specific embodiment, the fastening band 1050 is a steel band.

[0052] It can be understood that the height of the battery cell 1011 is not limited in the solution of the present application, and similarly, the height of the protection plate 1040 is not limited either. The height of the protection plate 1040 can be set according to the distance between the first bracket 1021 and the second bracket 1030 in the third direction.

[0053] Similarly, it can be understood that in the above embodiments, the battery module 1000 includes a total of six battery cells 1011. The above example of the number of battery cells 1011 is only for more clearly and comprehensively demonstrating the core idea and method of the present invention, in order to better understand the implementation manner of the present invention, and by no means limits the scope of the present invention. Any obvious modifications or equivalent replacements made without departing from the essence of the idea of the present invention should be regarded as within the protection scope of the present invention. During the actual production process, the number of battery cells 1011 assembled on the second bracket 1030 is not limited, and at the same time, the size of the battery cells 1011 is not limited either, and production and installation can be carried out according to the actual situation.

[0054] The present invention designs a bracket assembly, integrally connecting the first bracket and the aluminum bar, so that after the aluminum bar is fixed at a specific position on the first bracket after being formed and fixed in the injection mold, there is no need to position and place the aluminum bar again, and at this time, the position of the aluminum bar is correspondingly connected to the battery cell, avoiding the problem that the aluminum bar cannot be accurately aligned with the battery cell when placing the aluminum bar. On the other hand, by integrally connecting the aluminum bar and the first bracket to fix the aluminum bar, there is no need to add an additional fixing structure either.

[0055] The present invention designs a battery module, including the above bracket assembly and a plurality of battery cells. The battery cells are fixed in the bracket assembly, and the pole columns of the battery cells are connected to the aluminum bars of the bracket assembly. After the battery cells are stacked and the first bracket is covered, the aluminum bar integrally connected to the first bracket is aligned with the battery cells, and finally direct welding can be carried out, without the need to align and place the aluminum bars one by one at the corresponding positions of the battery cells, improving the assembly efficiency of the battery module, and at the same time avoiding the problem that the battery cells fail due to the misalignment of the aluminum bars with the battery cells.

[0056] The embodiment of the present invention further provides a battery pack, including a plurality of the above battery modules, a battery management system, and a thermal management system. This battery pack has all the advantages of the above bracket assembly and battery module, and will not be elaborated here.

[0057] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A bracket assembly, characterized in that, it includes: an aluminum row; and a first bracket configured to fix at least one battery cell; wherein, the first bracket and the aluminum row are integrally connected by injection molding; wherein, the first bracket is provided with a plurality of mounting holes, and the aluminum row is connected to the pole posts of the corresponding battery cells through the corresponding mounting holes; a plurality of first battery cell mounting grooves extending in a first direction and arranged at intervals in a second direction are provided on the first bracket, and the first battery cell mounting grooves correspond to and communicate with at least one of the mounting holes; one ends of the plurality of battery cells having terminals in a third direction are respectively located in the plurality of first battery cell mounting grooves.

2. The bracket assembly according to claim 1, characterized in that, bosses are provided at the edges of each hole at one end of the plurality of mounting holes away from the first battery cell mounting grooves, the bosses are arranged around the mounting holes and are configured to limit the aluminum row.

3. The bracket assembly according to claim 2, characterized in that, the bosses are arc-shaped, and protruding portions are provided at the ends of the bosses, and the aluminum row is fixed on the protruding portions.

4. The bracket assembly according to claim 2, characterized in that, at least one of the bosses is configured to limit one aluminum row; the bosses are located at at least one end of the aluminum row in the second direction, and at least one end of the aluminum row is in contact with the corresponding boss.

5. The bracket assembly according to claim 1, characterized in that, the bracket assembly further includes a second bracket, the second bracket is located on one side of the first bracket, and the second bracket cooperates with the first bracket to fix the battery cells.

6. The bracket assembly according to claim 5, characterized in that, a plurality of second battery cell mounting grooves extending in the first direction and arranged at intervals in the second direction are further provided on the second bracket, the second battery cell mounting grooves are arranged in one-to-one correspondence with the first battery cell mounting grooves, and one ends of the battery cells away from the pole posts in the third direction are fixed in the second battery cell mounting grooves.

7. A battery module, characterized in that, it includes the bracket assembly according to any one of claims 1-6 and a plurality of battery cells, the battery cells are fixed in the bracket assembly, and the pole posts of the battery cells are connected to the aluminum row of the bracket assembly.

8. The battery module according to claim 7, characterized in that, one end of the battery cell having a pole post is fixed in the first battery cell mounting groove, and one end of the battery cell away from the pole post is fixed in the second battery cell mounting groove of the bracket assembly.

9. The battery module according to claim 7, characterized in that, the battery module further includes two protection plates, the two protection plates are arranged between the first bracket and the second bracket and are oppositely arranged in the second direction; the plurality of battery cells are located between the two protection plates.

10. The battery module according to claim 9, characterized in that, the battery module further includes a fastening band, the fastening band is arranged between the first bracket and the second bracket and is arranged around the two protection plates.

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