Support, busbar assembly and battery pack

Abstract

This application provides a bracket, a busbar assembly, and a battery pack. The bracket includes a bracket body and a positioning part. The bracket body includes a first side and a second side distributed along a first direction. The first side is used to mount the busbar. The positioning part is disposed on the second side of the bracket body and forms a plurality of spaced positioning slots. The positioning slots are used for inserting one end of a battery cell to position the cell. The positioning part includes a partition between two adjacent positioning slots, separating the two adjacent positioning slots. By including a partition between two adjacent positioning slots in the positioning part, the battery cells inserted into the two positioning slots can be separated, reducing the risk of contact between the two cells. Simultaneously, the partition can also block metal particles falling between the two cells, preventing metal particles from simultaneously contacting both cells and reducing the risk of short circuits between the two cells through metal particles.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a bracket, busbar assembly, and battery pack. Background Technology

[0002] One end of the multiple cells in a battery pack is usually equipped with a bracket for mounting a busbar, which allows the busbar to connect multiple cells in series or in parallel, and the bracket isolates and positions the multiple cells to prevent adjacent cells from short-circuiting together after contact.

[0003] However, in related technologies, the isolation effect of the bracket on the battery cell is not good, and metal particles may fall between the battery cells, causing two adjacent battery cells to short-circuit through the metal particles. Utility Model Content

[0004] The embodiments of this application provide a bracket, a bus assembly, and a battery pack, which can improve the technical problem in the related art where the bracket has poor isolation effect on the battery cells, and metal particles are easily dropped between the battery cells, causing two adjacent battery cells to short-circuit through the metal particles.

[0005] In a first aspect, embodiments of this application provide a support, comprising:

[0006] The bracket body includes a first side and a second side distributed along a first direction, wherein the first side is used to install a busbar.

[0007] A positioning part is provided on the second side of the bracket body. The positioning part has a plurality of positioning grooves arranged at intervals. The positioning grooves are used for inserting one end of the battery cell to position the battery cell.

[0008] The positioning part includes a partition part located between two adjacent positioning slots, the partition part separating the two adjacent positioning slots.

[0009] In one embodiment, the positioning portion includes a protrusion extending circumferentially along the positioning groove, with two adjacent protrusions connected to each other to form the partition portion at the connection of two adjacent protrusions.

[0010] In one embodiment, the bracket body has a mounting hole that extends through the first direction, and the mounting hole communicates with the positioning groove so that the busbar is connected to the battery cell through the mounting hole;

[0011] In particular, on the projection plane perpendicular to the first direction, the orthographic projection of the partition overlaps with the orthographic projection of the mounting hole.

[0012] In one embodiment, the mounting hole includes a first hole region corresponding to a first electrode of the battery cell, and a second hole region corresponding to a second electrode of the battery cell, wherein the first electrode and the second electrode have opposite polarities, and the second hole region extends circumferentially along the first hole region;

[0013] In particular, on the projection plane perpendicular to the first direction, the orthographic projection of the partition portion overlaps with the orthographic projection of the second hole area.

[0014] In one embodiment, the depth of the positioning groove is greater than or equal to 1 mm and less than or equal to 8 mm.

[0015] In one embodiment, the radius of the positioning groove is greater than or equal to 23.9 mm and less than or equal to 24.1 mm.

[0016] In one embodiment, the inner circumferential surface of the positioning groove has a draft angle greater than or equal to 1° and less than or equal to 5°.

[0017] In one embodiment, the second side includes a cell mounting area, and the positioning part is located within the cell mounting area; the second side is also provided with a positioning protrusion, which extends along the edge of the cell mounting area and is used to abut against the outer peripheral surface of the cell near the edge of the cell mounting area.

[0018] In one embodiment, the positioning protrusion protrudes along the first direction from the surface of the positioning portion opposite to the first side.

[0019] In one embodiment, the positioning protrusion is provided at both ends of the cell mounting area along the second direction, and the second direction forms an angle with the first direction.

[0020] In one embodiment, the second side protrusion is provided with a reinforcing rib, which is located on the side of the positioning protrusion away from the cell mounting area, and the reinforcing rib is connected to the positioning protrusion.

[0021] In one embodiment, there are multiple reinforcing ribs, which are arranged along the extending direction of the positioning protrusion.

[0022] In one embodiment, the mounting hole includes a first hole region corresponding to a first electrode of the battery cell, and a second hole region corresponding to a second electrode of the battery cell, wherein the first electrode and the second electrode have opposite polarities, and the second hole region extends circumferentially along the first hole region and is interconnected with it.

[0023] In one embodiment, the busbar includes a first connecting busbar connected to the first electrode corresponding to the first aperture region, and a second connecting busbar connected to the second electrode corresponding to the second aperture region;

[0024] The bracket body includes an abutment surface located on the side of the second hole area near the first hole area. The abutment surface is used to abut against the second connecting row in the second hole area to limit the contact between the first connecting row and the second connecting row.

[0025] Secondly, embodiments of this application provide a bus component, including:

[0026] The bracket, as described above, includes a bracket body and a positioning part. The bracket body includes a first side and a second side distributed along a first direction. The first side is used to install a busbar. The positioning part is disposed on the second side of the bracket body and forms a plurality of positioning grooves spaced apart. The positioning grooves are used for inserting one end of a battery cell to position the battery cell. The positioning part includes a partition located between two adjacent positioning grooves, which separates two adjacent positioning grooves.

[0027] A busbar is installed on the first side of the bracket.

[0028] Thirdly, embodiments of this application provide a battery pack, comprising:

[0029] Bus assembly, wherein the bus assembly is as described above;

[0030] A battery module includes multiple battery cells, one end of which is inserted into a positioning slot in the bracket of the busbar assembly, and the busbar of the busbar assembly is connected to the multiple battery cells.

[0031] In one embodiment, the difference between the radius of the positioning groove and the radius of the battery cell is greater than or equal to 0.3 mm and less than or equal to 3.8 mm.

[0032] The beneficial effects of the embodiments of this application are as follows:

[0033] In the embodiments of this application, by using a first side of the bracket body along a first direction for mounting a busbar, and providing a positioning part on a second side of the bracket body along the first direction, the positioning part forms a plurality of positioning slots spaced apart for inserting one end of the power supply core, thereby positioning the power supply core and accurately connecting the busbar to the power supply core.

[0034] Building upon this, by including a partition between two adjacent positioning slots in the positioning section, the partition separates the two adjacent positioning slots, thus reducing the risk of contact between the two battery cells. Simultaneously, the partition also prevents metal particles falling between the two battery cells, preventing them from simultaneously contacting both cells and reducing the risk of short circuits caused by the metal particles. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of one embodiment of the battery pack provided in this application;

[0037] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 A top view of the battery pack provided in an embodiment of this application;

[0039] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0040] Figure 5 A schematic diagram of the structure of one embodiment of the bracket provided in this application;

[0041] Figure 6 for Figure 5 A magnified view of point C in the middle.

[0042] Explanation of reference numerals in the attached figures:

[0043] Battery pack 1; busbar assembly 10; bracket 11; bracket body 111; first side 1111; second side 1112; mounting hole 1113; first hole area 1114; second hole area 1115; abutment surface 1116; positioning part 112; protrusion 1121; positioning groove 1122; partition part 1123; cell mounting area 113; positioning protrusion 114; concave surface 1141; reinforcing rib 115; busbar 20; first connecting busbar 21; second connecting busbar 22; battery module 30; cell 31; first electrode 311; second electrode 312; first direction X; second direction Y. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0045] This application provides a bracket, a busbar assembly, and a battery pack. These will be described in detail below.

[0046] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack provided in this application. Figure 2 for Figure 1 A magnified view of point A in the middle. (See image below.) Figure 1 and Figure 2 As shown, the battery pack 1 includes a busbar assembly 10 and a battery module 30. The busbar assembly 10 includes a bracket 11 and a busbar 20. The battery module 30 includes multiple battery cells 31. The bracket 11 is connected to the multiple battery cells 31 of the battery module 30. The busbar 20 and the battery module 30 are located on opposite sides of the bracket 11 along a first direction X. The bracket 11 is used to mount the busbar 20. The busbar 20 is used to connect to the multiple battery cells 31 of the battery module 30 to connect the multiple battery cells 31 of the battery module 30 in parallel or in series.

[0047] Continue to refer to Figure 1 The bracket 11 includes a bracket body 111, which has a mounting hole 1113 extending along a first direction X. The busbar 20 is connected to the battery cell 31 through the mounting hole 1113. Alternatively, the busbar 20 can pass through the mounting hole 1113 to connect with the battery cell 31, or the battery cell 31 can pass through the mounting hole 1113 to connect with the busbar 20. Or, both the busbar 20 and the battery cell 31 can be inserted into the mounting hole 1113 and connected to each other.

[0048] like Figure 2As shown, the end of the battery cell 31 near the support 11 includes a first electrode 311 and a second electrode 312, with opposite polarities. The second electrode 312 extends circumferentially along the first electrode 311. Specifically, the second electrode 312 is arranged around the first electrode 311. The first electrode 311 can be the positive electrode, and the second electrode 312 the negative electrode. Alternatively, the first electrode 311 can be the negative electrode, and the second electrode 312 the positive electrode.

[0049] Busbar 20 includes a first connection bar 21 and a second connection bar 22 connected to the same battery cell 31. The first connection bar 21 is connected to the first electrode 311 of the corresponding battery cell 31, and is also used to connect to the second electrode 312 of a battery cell 31 on one side of the battery cell 31, thereby connecting the first electrode 311 of the battery cell 31 to the second electrode 312 of the battery cell 31 on one side via the first connection bar 21. The second connection bar 22 of busbar 20 is connected to the second electrode 312 of the corresponding battery cell 31, and is also used to connect to the first electrode 311 of a battery cell 31 on the other side of the battery cell 31, thereby connecting the second electrode 312 of the battery cell 31 to the first electrode 311 of the battery cell 31 on the other side via the second connection bar 22.

[0050] The mounting hole 1113 includes a first hole area 1114 corresponding to the first electrode 311 of the battery cell 31, and a second hole area 1115 corresponding to the second electrode 312 of the battery cell 31. A first connecting bar 21 is connected to the first electrode 311 of the corresponding battery cell 31 through the first hole area 1114. A second connecting bar 22 is connected to the second electrode 312 of the corresponding battery cell 31 through the second hole area 1115. The second hole area 1115 can extend circumferentially along the first hole area 1114 to increase the area of ​​the second hole area 1115, allowing the second connecting bar 22 to connect more fully to the second electrode 312 of the corresponding battery cell 31.

[0051] In some embodiments, the second hole region 1115 can extend circumferentially along the first hole region 1114 and communicate with it. This reduces the assembly accuracy requirements of the bracket 11 and the busbar 20, and makes the machining of the mounting holes 1113 very convenient.

[0052] The bracket body 111 may include an abutment surface 1116 located on the side of the second hole region 1115 near the first hole region 1114. This abutment surface 1116 is used to abut against the second connecting row 22 within the second hole region 1115 to limit contact between the first connecting row 21 and the second connecting row 22. It is understood that by having the abutment surface 1116 on the side of the second hole region 1115 near the first hole region 1114 abut against the second connecting row 22, movement of the second connecting row 22 toward the first connecting row 21 can be restricted, reducing the risk of short circuit between the first electrode 311 and the second electrode 312 of the battery cell 31 due to contact between the first connecting row 21 and the second connecting row 22.

[0053] Specifically, the bracket body 111 includes two abutment surfaces 1116, which are distributed circumferentially along the first hole area 1114 on both sides of the connection between the first hole area 1114 and the second hole area 1115. By abutting against the second connecting bar 22 with the two abutment surfaces 1116, the limiting effect on the second connecting bar 22 can be further improved, thereby further reducing the risk of short circuit between the first electrode 311 and the second electrode 312 of the battery cell 31 due to contact between the first connecting bar 21 and the second connecting bar 22.

[0054] like Figure 2 , Figure 3 and Figure 4 As shown, the bracket body 111 includes a first side 1111 and a second side 1112 distributed along a first direction X. The first side 1111 is used to install the busbar 20. The bracket 11 can include a positioning part 112 provided on the second side 1112 of the bracket body 111. The positioning part 112 forms a plurality of positioning grooves 1122 arranged at intervals. The positioning grooves 1122 are used for inserting one end of the power cell 31 to position the power cell 31, so that the position of the plurality of power cells 31 relative to the bracket 11 is more stable.

[0055] In some embodiments, the positioning part 112 may include a partition part 1123 located between two adjacent positioning slots 1122, the partition part 1123 separating the two adjacent positioning slots 1122. Thus, the partition part 1123 can separate the battery cells 31 inserted into the two positioning slots 1122, reducing the risk of the two battery cells 31 contacting each other. Simultaneously, the partition part 1123 can also block metal particles falling between the two battery cells 31, preventing the metal particles from simultaneously contacting both battery cells 31, reducing the risk of the two battery cells 31 short-circuiting through the metal particles.

[0056] In some embodiments, such as Figure 5 and Figure 6As shown, the positioning part 112 can include a protrusion 1121 extending circumferentially along the positioning groove 1122, with adjacent protrusions 1121 connected to each other to form a partition 1123 at the connection point of adjacent protrusions 1121. This allows the partition 1123 to be located in the region where adjacent positioning grooves 1122 are close to each other. When one end of each of the two battery cells 31 is inserted into adjacent positioning grooves 1122, the partition 1123 is located at the point where the distance between the two adjacent battery cells 31 is minimized, thus minimizing the risk of metal particles short-circuiting the two battery cells 31.

[0057] Continue to refer to Figure 5 and Figure 6 The bracket body 111 has a mounting hole 1113 extending along the first direction X. The mounting hole 1113 communicates with the positioning groove 1122, allowing the busbar 20 to connect to the battery cell 31 through the mounting hole 1113. Specifically, on a projection plane perpendicular to the first direction X, the orthographic projection of the partition portion 1123 can overlap with the orthographic projection of the mounting hole 1113. Therefore, the area of ​​the battery cell 31 near the partition portion 1123 can also be connected to the busbar 20 through the mounting hole 1113, which helps to increase the connection area between the busbar 20 and the battery cell 31, and improves the connection stability between the busbar 20 and the battery cell 31.

[0058] Specifically, the mounting hole 1113 includes a first hole region 1114 corresponding to the first electrode 311 of the battery cell 31, and a second hole region 1115 corresponding to the second electrode 312 of the battery cell 31. The first electrode 311 and the second electrode 312 have opposite polarities, and the second hole region 1115 extends circumferentially along the first hole region 1114. In a projection plane perpendicular to the first direction X, the orthographic projection of the partition portion 1123 overlaps with the orthographic projection of the second hole region 1115. This allows the area of ​​the second electrode 312 of the battery cell 31 near the partition portion 1123 to be connected to the second connecting bar 22 through the second hole region 1115, which helps to increase the connection area between the second connecting bar 22 and the second electrode 312.

[0059] In some embodiments, the depth of the positioning groove 1122 can be greater than or equal to 1 mm and less than or equal to 8 mm. Therefore, after one end of the battery cell 31 is inserted into the positioning groove 1122, the positioning groove 1122 can provide a good positioning effect for the battery cell 31. At the same time, it can avoid waste of material in the positioning part 112 due to excessive depth of the positioning groove 1122. The depth of the positioning groove 1122 can be 1.5 mm, 3 mm, 5 mm, 6 mm, etc., depending on the structure of the battery cell 31 and the bracket 11.

[0060] In some embodiments, the radius of the positioning groove 1122 can be greater than or equal to 23.9 mm and less than or equal to 24.1 mm, so that one end of the battery cell 31 can be smoothly inserted into the positioning groove 1122, and the inner circumferential surface of the positioning groove 1122 can effectively position the battery cell 31. The radius of the positioning groove 1122 can be 23.93 mm, 23.98 mm, 24 mm, etc., depending on the structure of the battery cell 31 and the bracket 11. For example, the radius of the battery cell 31 can be 23 mm, so that when one end of the battery cell 31 is inserted into the positioning groove 1122, the inner circumferential surface of the positioning groove 1122 can effectively position the battery cell 31.

[0061] In some embodiments, the difference between the radius of the positioning groove 1122 and the radius of the battery cell 31 can be greater than or equal to 0.3 mm and less than or equal to 3.8 mm. This allows one end of the battery cell 31 to be smoothly inserted into the positioning groove 1122, and the inner circumferential surface of the positioning groove 1122 to effectively position the battery cell 31. The difference between the radius of the positioning groove 1122 and the radius of the battery cell 31 can be 0.5 mm, 1 mm, 1.7 mm, 2.5 mm, 3 mm, 3.6 mm, etc., depending on the structure of the battery cell 31 and the bracket 11.

[0062] It should be noted that the radius of the positioning groove 1122 can be determined based on the radius of the battery cell 31. It is only necessary to satisfy that the radius of the positioning groove 1122 is greater than the radius of the battery cell 31, and that the difference between the radius of the positioning groove 1122 and the radius of the battery cell 31 is greater than or equal to 0.3mm and less than or equal to 3.8mm. There are no restrictions here. For example: when cell 31 is a 4680 battery, the radius of cell 31 is 23mm, and the radius of positioning groove 1122 can be greater than or equal to 23.3mm and less than or equal to 25.8mm; when cell 31 is an 18650 battery, the radius of cell 31 is 9mm, and the radius of positioning groove 1122 can be greater than or equal to 9.3mm and less than or equal to 12.8mm; when cell 31 is a 21700 battery, the radius of cell 31 is 10.5mm, and the radius of positioning groove 1122 can be greater than or equal to 10.8mm and less than or equal to 14.3mm; when cell 31 is a 26650 battery, the radius of cell 31 is 13mm, and the radius of positioning groove 1122 can be greater than or equal to 13.3mm and less than or equal to 15.8mm.

[0063] In some embodiments, the inner circumferential surface of the positioning groove 1122 may have a draft angle, which is greater than or equal to 1° and less than or equal to 5°. This makes injection molding of the positioning groove 1122 more convenient. Furthermore, it prevents the draft angle of the positioning groove 1122 from being too large, which could affect the positioning effect of the inner circumferential surface of the positioning groove 1122 on the battery cell 31. The draft angle of the inner circumferential surface of the positioning groove 1122 can be 2°, 3.2°, 3.8°, 4°, 4.4°, 4.8°, etc., specifically determined according to the structure of the battery cell 31 and the bracket 11.

[0064] like Figure 5 and Figure 6 As shown, the second side 1112 of the bracket 11 includes a cell mounting area 113, and the positioning part 112 is located within the cell mounting area 113. In some embodiments, the second side 1112 of the bracket 11 may also be provided with a positioning protrusion 114, which extends along the edge of the cell mounting area 113 and is used to abut against the outer peripheral surface of the cell 31 near the edge of the cell mounting area 113. Thus, the cell 31 near the edge of the cell mounting area 113 can be positioned by the positioning protrusion 114, which helps to improve the connection stability between the cell 31 and the bracket 11.

[0065] The positioning protrusion 114 can abut against the outer peripheral surface of a plurality of battery cells 31 near the edge of the battery cell mounting area 113, so that the connection between the plurality of battery cells 31 near the edge of the battery cell mounting area 113 and the bracket 11 is more stable.

[0066] In some embodiments, positioning protrusions 114 may be provided at both ends of the cell mounting area 113 along the second direction Y to further improve the connection stability between the cell 31 and the bracket 11 near the edges of the cell mounting area 113 along the second direction Y. The second direction Y forms an angle with the first direction X.

[0067] In some embodiments, the positioning protrusion 114 includes a concave surface 1141 located on the side of the positioning protrusion 114 facing the cell mounting area 113. The concave surface 1141 of the positioning protrusion 114 is adapted to fit the outer peripheral surface of the cell 31 near the edge of the cell mounting area 113 to improve the positioning effect of the positioning protrusion 114 on the cell 31.

[0068] Specifically, the positioning protrusion 114 includes multiple concave surfaces 1141. The multiple concave surfaces 1141 of the positioning protrusion 114 are arranged along the length direction of the positioning protrusion 114. The multiple concave surfaces 1141 of the positioning protrusion 114 are used to correspond and adapt to the outer peripheral surfaces of multiple battery cells 31 near the edge of the battery cell mounting area 113, so as to improve the positioning effect of the positioning protrusion 114 on the multiple battery cells 31.

[0069] In some embodiments, the positioning protrusion 114 may protrude along the first direction X from the surface of the positioning portion 112 away from the first side 1111. This increases the length of the positioning protrusion 114 in the first direction X, which is beneficial to improving the positioning effect of the positioning protrusion 114 on the battery cell 31 near the edge of the battery cell mounting area 113.

[0070] In some embodiments, a reinforcing rib 115 may be provided on the second side 1112 of the bracket 11. The reinforcing rib 115 is located on the side of the positioning protrusion 114 away from the cell mounting area 113, and the reinforcing rib 115 is connected to the positioning protrusion 114. Thus, the positioning protrusion 114 can be supported by the reinforcing rib 115, reducing the deformation of the positioning protrusion 114, making the positioning protrusion 114 stronger, and improving the positioning effect of the cell 31 near the edge of the cell mounting area 113.

[0071] The number of reinforcing ribs 115 can be multiple. Multiple reinforcing ribs 115 are arranged along the extending direction of the positioning protrusion 114 to further enhance the reinforcement effect on the positioning protrusion 114. Specifically, the reinforcing ribs 115 and the positioning protrusion 114 are an integral structure. The reinforcing ribs 115 protrude from the surface of the second side 1112 of the bracket 11 along the first direction X. The thickness direction of the reinforcing ribs 115 is perpendicular to the second direction Y. The edge of the reinforcing rib 115 near the positioning protrusion 114 is connected to the side of the positioning protrusion 114 opposite to the cell mounting area 113. Multiple reinforcing ribs 115 are spaced apart along the extending direction of the positioning protrusion 114.

[0072] This application also provides a bus assembly, which includes a bracket. The specific structure of the bracket is as described in the above embodiments. Since this bus assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0073] The bus assembly 10 may include a bracket 11 and a bus 20, with the bus 20 mounted on the first side 1111 of the bracket 11. The structures of the bus 20 and the bracket 11 can be referred to in the above embodiments, and will not be repeated here.

[0074] This application also provides a battery pack, which includes a busbar assembly. The specific structure of the busbar assembly is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] The battery pack 1 may include a busbar assembly 10 and a battery module 30. The battery module 30 includes a plurality of battery cells 31, one end of which is inserted into the positioning groove 1122 of the bracket 11 of the busbar assembly 10. The busbar 20 of the busbar assembly 10 is connected to the plurality of battery cells 31. The structure of the busbar assembly 10 and the battery module 30 can refer to the above embodiments, and will not be repeated here.

[0076] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A support, characterized in that, include: The bracket body includes a first side and a second side distributed along a first direction, wherein the first side is used to install a busbar. A positioning part is provided on the second side of the bracket body. The positioning part has a plurality of positioning grooves arranged at intervals. The positioning grooves are used for inserting one end of the battery cell to position the battery cell. The positioning part includes a partition part located between two adjacent positioning slots, the partition part separating the two adjacent positioning slots.

2. The bracket as described in claim 1, characterized in that, The positioning portion includes a protrusion extending circumferentially along the positioning groove, with two adjacent protrusions connected to each other to form the partition portion at the connection of two adjacent protrusions.

3. The bracket as described in claim 1, characterized in that, The bracket body has a through mounting hole extending along the first direction. The mounting hole communicates with the positioning groove so that the busbar can be connected to the battery cell through the mounting hole. In particular, on the projection plane perpendicular to the first direction, the orthographic projection of the partition overlaps with the orthographic projection of the mounting hole.

4. The bracket as described in claim 3, characterized in that, The mounting hole includes a first hole area corresponding to a first electrode of the battery cell, and a second hole area corresponding to a second electrode of the battery cell, wherein the first electrode and the second electrode have opposite polarities, and the second hole area extends circumferentially along the first hole area; In particular, on the projection plane perpendicular to the first direction, the orthographic projection of the partition portion overlaps with the orthographic projection of the second hole area.

5. The stent as described in any one of claims 1 to 4, characterized in that, The depth of the positioning groove is greater than or equal to 1 mm and less than or equal to 8 mm.

6. The stent as described in any one of claims 1 to 4, characterized in that, The radius of the positioning groove is greater than or equal to 23.9 mm and less than or equal to 24.1 mm.

7. The stent as described in any one of claims 1 to 4, characterized in that, The inner circumferential surface of the positioning groove has a draft angle, which is greater than or equal to 1° and less than or equal to 5°.

8. The stent as described in any one of claims 1 to 4, characterized in that, The second side includes a cell mounting area, and the positioning part is located in the cell mounting area; the second side is also provided with a positioning protrusion, which extends along the edge of the cell mounting area and is used to abut against the outer peripheral surface of the cell near the edge of the cell mounting area.

9. The bracket as described in claim 8, characterized in that, The positioning protrusion protrudes along the first direction from the surface of the positioning portion away from the first side.

10. The bracket as described in claim 8, characterized in that, The cell mounting area is provided with positioning protrusions at both ends along the second direction, and the second direction forms an angle with the first direction.

11. The bracket as described in claim 8, characterized in that, The second side protrusion is provided with a reinforcing rib, which is located on the side of the positioning protrusion away from the cell mounting area, and the reinforcing rib is connected to the positioning protrusion.

12. The stent as described in claim 11, characterized in that, The number of reinforcing ribs is multiple, and the multiple reinforcing ribs are arranged along the extension direction of the positioning protrusion.

13. The stent as described in claim 3 or 4, characterized in that, The mounting hole includes a first hole area corresponding to a first electrode of the battery cell, and a second hole area corresponding to a second electrode of the battery cell. The first electrode and the second electrode have opposite polarities. The second hole area extends circumferentially along the first hole area and is interconnected with it.

14. The stent as described in claim 13, characterized in that, The busbar includes a first connecting busbar connected to the first electrode corresponding to the first aperture region, and a second connecting busbar connected to the second electrode corresponding to the second aperture region; The bracket body includes an abutment surface located on the side of the second hole area near the first hole area. The abutment surface is used to abut against the second connecting row in the second hole area to limit the contact between the first connecting row and the second connecting row.

15. A bus assembly, characterized in that, include: The stent is the stent according to any one of claims 1 to 14; A busbar is installed on the first side of the bracket.

16. A battery pack, characterized in that, include: Bus assembly, wherein the bus assembly is the bus assembly as described in claim 15; A battery module includes multiple battery cells, one end of which is inserted into a positioning slot in the bracket of the busbar assembly, and the busbar of the busbar assembly is connected to the multiple battery cells.

17. The battery pack as claimed in claim 16, characterized in that, The difference between the radius of the positioning groove and the radius of the battery cell is greater than or equal to 0.3 mm and less than or equal to 3.8 mm.

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