Vertical laser welding tool for multi-series and multi-parallel soft package battery pack

Abstract

The utility model relates to a vertical laser welding tool for a multi-series parallel soft package battery pack, which comprises a base component, a cylinder component, a press claw positioning component, a press claw component, a limit component and a soft package battery pack, the cylinder component is fixedly connected onto the base component, the press claw positioning component comprises a connecting plate and a cross beam, and the connecting plate is vertically and fixedly connected with the cross beam. The connecting plate is fixedly connected with an air cylinder of the air cylinder assembly, pressing claw adjusting blocks are fixedly connected to the cross beam, transverse long-strip-shaped U-shaped counter bores are formed in the pressing claw adjusting blocks respectively, the pressing claw adjusting blocks are fixedly connected with the pressing claw assembly through the transverse long-strip-shaped U-shaped counter bores, the limiting assembly is fixedly connected with the base assembly, the position of the limiting assembly corresponds to the position of the pressing claw assembly, and the base assembly is fixedly connected with the laser welding machine. The position of the soft package battery assembly is adjusted through the limiting assembly, the position of the pressing claw assembly is transversely and longitudinally adjusted through the pressing claw positioning assembly, the welding area of the battery pack assembly is controlled by adjusting the positions of the pressing claw assembly and the limiting assembly, and the welding quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, and in particular to a vertical laser welding tool for a multi-series and parallel soft-pack battery pack. Background Art

[0002] Due to the higher mass energy density and enhanced safety of soft-pack lithium-ion batteries, they are increasingly being used in small consumer products such as drones and floor scrubbers. Most of these consumer products use multiple soft-pack lithium-ion batteries in series or parallel, necessitating the need to connect multiple batteries in series or parallel to increase battery capacity or voltage. Current soft-pack lithium-ion batteries typically require welding to busbars. Therefore, quickly, simply, and efficiently connecting these multiple soft-pack batteries in series and parallel is crucial.

[0003] Currently, the series and parallel connection of soft-pack lithium-ion batteries is fixedly connected to the busbar by soldering. The existing technology has the following shortcomings: ① The high temperature of nearly 300°C generated during soldering is directly transmitted to the interior of the battery, causing certain damage to the internal structure of the battery cell. If the soldering time is long, it may even cause the battery cell to explode and catch fire in severe cases; ② Due to the limited operating environment of soldering, it is not easy to mechanize and automate; ③ The soldering process requires the positive electrode of the battery cell to be converted from aluminum to nickel, which is very costly.

[0004] In existing multi-series / parallel battery pack assembly methods, if the cells are horizontal, the laser welding tool only needs to be adjusted in one direction to ensure the welding position. However, in current multi-series / parallel battery packs, the cells are vertical. Due to the different thicknesses and tab positions of the assembled cells, the welding position also varies. Adjustments in both the horizontal and vertical directions are required to ensure the accuracy of the welding position and thus the weld quality.

[0005] The assembly of battery packs urgently requires the development of a tool that can quickly, simply and effectively connect multiple soft-pack batteries in series. Utility Model Content

[0006] The utility model aims to overcome the deficiencies in the prior art and provides a vertical laser welding tool for multi-series and parallel soft-pack battery packs. The position of the soft-pack battery assembly is adjusted by a limit assembly, and the lateral and longitudinal positions of the assembly are positioned by a pressure claw, so that the welding area of ​​the battery pack assembly can be controlled to ensure the welding quality.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a vertical laser welding tool for multi-series and parallel soft-pack battery packs, comprising a base assembly, a cylinder assembly, a pressure claw positioning assembly, a pressure claw assembly, a limit assembly and a soft-pack battery assembly, the base assembly is fixedly connected to the cylinder assembly, the pressure claw positioning assembly comprises a connecting plate and a crossbeam, the connecting plate and the crossbeam are vertically fixed to form a right-angled pressure claw positioning workbench, and are fixed to the cylinder of the cylinder assembly through the connecting plate, the crossbeam is fixedly provided with a first pressure claw adjustment block and a second pressure claw adjustment block arranged parallel to each other, the first pressure claw adjustment block and the second pressure claw adjustment block are respectively provided with a transverse long U-shaped countersunk hole, the first pressure claw adjustment block and the second pressure claw adjustment block are fixedly connected to the pressure claw assembly through a transverse long U-shaped countersunk hole to adjust the lateral position of the pressure claw assembly, the limit assembly is fixed to the base assembly, the position of the limit assembly is set corresponding to the pressure claw assembly, the soft-pack battery assembly is placed between the limit assembly and the pressure claw assembly, and the base assembly is fixed to the laser welding machine platform.

[0008] Furthermore, the base assembly includes a base, a first height pad and a second height pad fixed in sequence from bottom to top, and the second height pad is provided with 28 adjustment holes, and the position of the limit assembly is adjusted by adjusting the position of the holes.

[0009] Furthermore, the cylinder assembly includes a cylinder, a cylinder fixing plate, a first rib plate, a second rib plate and a cylinder bottom plate. The cylinder bottom plate is vertically fixed to the cylinder fixing plate. The first rib plate and the second rib plate are fixed at the connection between the cylinder bottom plate and the cylinder fixing plate. The cylinder is fixed to the cylinder fixing plate.

[0010] Furthermore, a first reinforcing rib and a second reinforcing rib are fixedly connected to the connection between the connecting plate and the crossbeam of the pressure claw positioning assembly.

[0011] Furthermore, the first pressure jaw adjusting block and the second pressure jaw adjusting block are respectively provided with longitudinal long U-shaped countersunk holes along their length directions for adjusting the longitudinal position of the pressure jaw assembly.

[0012] Furthermore, the pressure claw assembly includes a mounting seat, a connecting block, a connecting shaft, a pressure claw and a spring. The mounting seat is provided with a spring mounting hole and a fixed circular hole. The mounting seat is fixedly connected to the pressure claw adjustment block by a screw passing through the fixed circular hole. The connecting block and the pressure claw are pinned by a connecting shaft. A spring is placed in the spring mounting hole between the connecting block and the pressure claw, and a fixed copper sleeve is fixed in the fixed circular hole.

[0013] Furthermore, the limiting assembly includes a support block, a transverse limiting block and a longitudinal limiting block. The transverse limiting block is fixed to the front end side wall of the support block, and the longitudinal limiting block is fixed to the left side wall of the support block. The transverse limiting block and the longitudinal limiting block respectively limit the transverse and longitudinal positions of the soft-pack battery assembly. A longitudinal long U-shaped countersunk hole is provided on the support block along its radial direction, and a transverse long U-shaped countersunk hole is provided on the support block along its axial direction.

[0014] Beneficial effects: Compared with the prior art, the utility model adjusts the position of the soft-pack battery assembly through the limit assembly, and adjusts the position of the pressure claw assembly horizontally and vertically through the pressure claw positioning assembly, and controls the welding area of ​​the battery pack assembly by adjusting the positions of the two to ensure welding quality, while the operation is fast, simple and effective; it has strong versatility, and can be used to address the common phenomenon that the laser welding tooling needs to be updated accordingly due to the rapid model updates of consumer soft-pack battery packs and the different sizes and tab positions of different battery models. By adjusting the positions of the adjustment blocks and batteries of the laser welding tooling and the limit blocks to ensure the position of the laser welding points, only the cell bracket in the soft-pack battery assembly needs to be changed when changing models, thereby reducing the tooling design cost and production cost of assembling consumer soft-pack battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0017] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the middle base assembly;

[0018] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional structure of the cylinder assembly;

[0019] Figure 5a yes Figure 1 Schematic diagram of the left side structure of the middle pressure claw positioning assembly;

[0020] Figure 5b yes Figure 1 Schematic diagram of the right side structure of the middle pressure claw positioning assembly;

[0021] Figure 6a yes Figure 1 Schematic diagram of the structure of the intermediate pressure claw assembly;

[0022] Figure 6b This is a schematic diagram of the structure of the mounting base of the pressure claw assembly;

[0023] Figure 6c It is a structural diagram of the pressure claw;

[0024] Figure 6d It is a cross-sectional view of the pressure claw;

[0025] Figure 7 Schematic diagram of the three-dimensional structure of the limit assembly;

[0026] FIG8 is a schematic diagram of the three-dimensional structure of a soft-pack battery assembly;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the soft-pack battery pack in the laser welding state:

[0028] Figure 10 This is a top view of the laser welding state of the soft-pack battery pack.

[0029] In the figure: 10, base assembly, 101, base, 102, first height pad, 103, second height pad, 1031, adjustment hole, 20, cylinder assembly, 201, cylinder, 202, cylinder fixing plate, 203, first rib plate, 204, second rib plate, 205, cylinder bottom plate, 30, pressure claw positioning assembly, 301, connecting plate, 302, beam, 303, first reinforcing rib, 304, second reinforcing rib, 305, first pressure claw adjustment block, 3 051, 3052, horizontal long U-shaped countersunk hole, 3053, longitudinal long U-shaped countersunk hole, 306, second pressure claw adjustment block, 3061, 3062, horizontal long U-shaped countersunk hole, 3063, longitudinal long U-shaped countersunk hole, 40, pressure claw assembly, 401, mounting seat, 402, fixed copper sleeve, 403, connecting block, 404, connecting shaft, 405, first pressure claw, 406, second pressure claw, 407, spring, 50, limit assembly, 501, support block, 5011, horizontal U-shaped countersunk hole, 502, horizontal limit block, 503, longitudinal limit block, 60, soft-pack battery assembly, 601, multi-series and parallel soft-pack battery pack, 602, bus, 603, bracket, 604, welding area. DETAILED DESCRIPTION

[0030] The following is a detailed description of the specific implementation method provided by the present invention in combination with the preferred embodiment: Referring to the accompanying drawings, this embodiment provides a vertical laser welding tool for a multi-series and parallel soft-pack battery pack, including a base assembly 10, a cylinder assembly 20, a pressure claw positioning assembly 30, a pressure claw assembly 40, a limit assembly 50 and a soft-pack battery assembly 60, the base assembly is fixed with a cylinder assembly, the pressure claw positioning assembly includes a connecting plate and a beam, the connecting plate and the beam are vertically fixed to form a right-angled pressure claw positioning workbench, through the air between the connecting plate and the cylinder assembly The cylinder is fixed, and the crossbeam is fixed with a first pressure claw adjustment block and a second pressure claw adjustment block arranged in parallel with each other. The first pressure claw adjustment block and the second pressure claw adjustment block are respectively provided with a horizontal long U-shaped countersunk hole. The first pressure claw adjustment block and the second pressure claw adjustment block are fixed to the pressure claw assembly through the horizontal long U-shaped countersunk hole to adjust the horizontal position of the pressure claw assembly. The limit assembly is fixed to the base assembly, and the position of the limit assembly is set corresponding to the pressure claw assembly. The soft-pack battery assembly is placed between the limit assembly and the pressure claw assembly, and the base assembly is fixed to the laser welding machine platform.

[0031] The preferred solution of this embodiment is that the base assembly includes a base, a first height pad and a second height pad fixed in sequence from bottom to top, and the second height pad is provided with 28 adjustment holes, and the position of the limit assembly is adjusted by adjusting the position of the holes.

[0032] The preferred solution of this embodiment is that the cylinder assembly includes a cylinder 201, a cylinder fixing plate 202, a first rib plate 203, a second rib plate 204 and a cylinder base plate 205, the cylinder base plate is vertically fixed to the cylinder fixing plate, the first rib plate 203 and the second rib plate 204 are fixed at the connection between the cylinder base plate and the cylinder fixing plate, and the cylinder is fixed on the cylinder fixing plate.

[0033] A preferred solution of this embodiment is that a first reinforcing rib and a second reinforcing rib are fixedly connected to the connection between the connecting plate and the crossbeam of the pressure claw positioning assembly.

[0034] A preferred solution of this embodiment is that the first pressure jaw adjusting block and the second pressure jaw adjusting block are respectively provided with longitudinal long U-shaped countersunk holes along their length directions for adjusting the longitudinal position of the pressure jaw assembly 40 .

[0035] The preferred embodiment of the present invention is that the pressure claw assembly 40 includes a mounting base 401, a connecting block 403, a connecting shaft 404, a pressure claw 405, and a spring 407. The mounting base 401 is provided with a spring mounting hole and a fixed circular hole. The mounting base is fixedly connected to the connecting block 403 via a screw extending through the spring mounting hole. The connecting block 403 and the pressure claw 405 are pinned together via a connecting shaft. A spring is provided between the connecting block and the pressure claw. A fixed copper sleeve 402 is fixedly connected to the fixed circular hole. The fixed copper sleeve 402 is embedded in the mounting base 401 and is fixedly connected to the first longitudinal U-shaped countersunk hole 3053 of the first pressure claw adjustment block 305 via a bolt. The fixed copper sleeve has a threaded hole inside that is compatible with the bolt. Since the position of the pressure claw needs to be frequently adjusted by tightening the bolts adapted to the fixed copper sleeve in actual operation, the addition of the fixed copper sleeve is intended to improve the life of the pressure claw assembly and avoid thread slippage caused by repeated tightening.

[0036] The preferred solution of this embodiment is that the limiting assembly 50 includes a support block 501, a transverse limiting block 502 and a longitudinal limiting block 503, the transverse limiting block 502 is fixedly connected to the front end side wall of the support block 501, and the longitudinal limiting block 503 is fixedly connected to the left side wall of the support block 501, the transverse limiting block 502 and the longitudinal limiting block 503 respectively limit the transverse and longitudinal positions of the soft-pack battery assembly 60, and the support block 501 is provided with a longitudinal long U-shaped countersunk hole along its radial direction, and the support block 501 is provided with a transverse long U-shaped countersunk hole along its axial direction.

[0037] The working process of this tool is described in detail in combination with the specific structure of the embodiment.

[0038] See attached for details Figure 1-10 First, the cylinder assembly 20 is fixedly connected to the base assembly 10, then the pressure claw positioning assembly 30 is fixedly connected to the cylinder assembly 20, then the pressure claw assembly 40 is installed on the pressure claw positioning assembly 30, and then the limit assembly 50 is installed on the base assembly 10. Then the entire tooling is connected to the laser welding equipment.

[0039] See also Figure 3 The base assembly 10 includes a base 101, a first height pad 102, and a second height pad 103; the base 101 is fixedly connected to the laser welding machine platform, and the first height pad 102 and the second height pad 103 can be added or subtracted at any time according to the height of the soft-pack battery assembly to ensure the welding height, wherein the base 101 is made of aluminum, and the first height pad 102 and the second height pad 103 are made of red bakelite or other insulating materials;

[0040] The second height pad 103 includes 28 adjustment holes 1031 , wherein the positions of the adjustment holes can adjust the position of the limit assembly 50 ;

[0041] See also Figure 4 The cylinder assembly 20 includes a cylinder 201, a cylinder fixing plate 202, a first rib plate 203, a second rib plate 204, and a cylinder base plate 205. The cylinder 201 is fixedly connected to the cylinder fixing plate 202 via bolts, which in turn are fixedly connected to the cylinder base plate via bolts. To enhance the stability of the entire cylinder assembly, the first rib plate 203 and the second rib plate 204 are fixedly connected to the cylinder fixing plate 202 and the cylinder base plate 205, respectively. The cylinder fixing plate 202, the first rib plate 203, the second rib plate 204, and the cylinder base plate 205 are all made of aluminum, which increases their service life.

[0042] The model of the cylinder 201 is 25A-MXQ16-20, or other suitable models of cylinders. The cylinder needs to be equipped with upper and lower limit switches to control the stroke of the cylinder 201 to prevent the stroke from being too large, which would cause the pressure claw assembly 40 to generate a large impact and damage the soft-pack battery assembly.

[0043] See also Figure 5a and Figure 5b The pressure claw positioning assembly 30 includes a connecting plate 301, a crossbeam 302, a first reinforcing rib 303, a second reinforcing rib 304, a first pressure claw adjustment block 305, and a second pressure claw adjustment block 306. The connecting plate 301 is fixedly connected to the cylinder 201 in the cylinder assembly 20, the crossbeam 302 is fixedly connected to the connecting plate 301, the first reinforcing rib 303 and the second reinforcing rib 304 are fixedly connected to the connecting plate 301 and the crossbeam 302, respectively, and the first pressure claw adjustment block 305 and the second pressure claw adjustment block 306 are both fixedly connected to the crossbeam 302. The connecting plate 301, the crossbeam 302, the first reinforcing rib 303, the second reinforcing rib 304, the first pressure claw adjustment block 305, and the second pressure claw adjustment block 306 are all made of aluminum;

[0044] The first pressure jaw adjustment block 305 includes a first transverse long U-shaped countersunk hole 3051, a second transverse long U-shaped countersunk hole 3052, and a first longitudinal long U-shaped countersunk hole 3053; the second pressure jaw adjustment block 306 includes a first transverse long U-shaped countersunk hole 3061, a second transverse long U-shaped countersunk hole 3062, and a first longitudinal long U-shaped countersunk hole 3063. These six long U-shaped countersunk holes can adjust the transverse and longitudinal positions of the pressure jaw assembly 40;

[0045] See also Figure 6a 、 Figure 6b 、 Figure 6c and Figure 6dThe pressure claw assembly 40 includes a mounting base 401, a fixed copper sleeve 402, a connecting block 403, a connecting shaft 404, a first pressure claw 405, a second pressure claw 406, and a spring 407. The mounting base 401 is fixedly connected to the connecting block 403, and the connecting block 403 is fixedly connected to the first pressure claw 405 or the second pressure claw 406 through the connecting shaft 404. The fixed copper sleeve 402 is embedded in the mounting base 401. The spring 407 is placed between the connecting block 403 and the first pressure claw 405 or the second pressure claw 406 to play a buffering role. The placement of the cylinder makes the welding force too large and crushes the battery assembly. The mounting base 401, the fixed copper sleeve 402, the connecting block 403, the connecting shaft 404, the first pressure claw 405, the second pressure claw 406, and the spring 407 are all made of brass; the connecting shaft 404 is made of 45# steel, and the spring 407 is made of spring steel.

[0046] See also Figure 7 , the limiting assembly 50 includes a support block 501, a transverse limiting block 502 and a longitudinal limiting block 503. The support block 501 is fixedly connected to the transverse limiting block 502 and the longitudinal limiting block 503 respectively, and then the limiting assembly 50 is fixedly connected to the base assembly 10, wherein the limiting assembly 50 can be adjusted in the transverse and longitudinal positions of the base assembly 10. The support block 501 is used to support the soft-pack battery assembly 60, and the transverse limiting block 502 and the longitudinal limiting block 503 are used to limit the transverse and longitudinal positions of the soft-pack battery assembly 60 respectively. The materials of the support block 501, the transverse limiting block 502 and the longitudinal limiting block 503 are all insulating materials, and red bakelite is recommended;

[0047] The support block 501 includes a first transverse long U-shaped countersunk hole 5011, a second transverse long U-shaped countersunk hole 5012, a first longitudinal long U-shaped countersunk hole 5013, and a second longitudinal long U-shaped countersunk hole 5014; these four long U-shaped countersunk holes can adjust the transverse and longitudinal positions of the limit assembly 50 on the base assembly 10;

[0048] See also Figure 8a and Figure 8b The soft-pack battery assembly 60 includes a multi-parallel soft-pack battery pack 601, a busbar 602, a bracket 603, and a welding area 604. The multi-parallel soft-pack battery pack 601 needs to be placed in the bracket 603, and then the busbar 602 is placed on the bracket 603, ensuring that the position where the pressure claw 1 405 and the pressure claw 2 406 press on the soft-pack battery assembly 60 is exactly the welding area 604. The material of the bracket 603 is all insulating material, and red bakelite is recommended.

[0049] See also Figure 9 and Figure 10During laser welding, the position where the first pressing claw 405 and the second pressing claw 406 press on the soft-pack battery assembly 60 is exactly the welding area 604, wherein the position and number of the first pressing claw 405 and the second pressing claw 406 are determined according to the welding area 604 of the soft-pack battery assembly 60 to ensure welding quality.

[0050] Specifically, during laser welding, the soft-pack battery assembly 60 is first placed on the limiting assembly 50, and then the positions of the limiting assembly 50 and the pressing claw assembly 40 are adjusted according to the welding area 604 to ensure that the first pressing claw 405 and the second pressing claw 406 of the pressing claw assembly 40 are pressed intactly on the welding area 604, and must be pressed tightly, otherwise it will cause a cold weld of the battery and cause defects. At this time, laser welding can be performed. After laser welding, the soft-pack battery assembly 60 can be taken out, and then the multi-serial and parallel soft-pack battery pack 601 can be taken out from the bracket 603 to perform the subsequent process operations.

[0051] The above-mentioned detailed description of a vertical laser welding tool for a multi-series and parallel soft-pack battery pack with reference to the embodiment is illustrative rather than restrictive. Several embodiments can be listed according to the limited scope. Therefore, changes and modifications without departing from the overall concept of the present invention should fall within the scope of protection of the present invention.

Claims

1. A vertical laser welding tool for multiple series and parallel soft-pack battery packs, characterized by: It includes a base assembly, a cylinder assembly, a pressure claw positioning assembly, a pressure claw assembly, a limit assembly and a soft-pack battery assembly. The base assembly is fixedly connected to the cylinder assembly. The pressure claw positioning assembly includes a connecting plate and a crossbeam. The connecting plate is vertically fixed to the crossbeam to form a right-angle pressure claw positioning workbench. The connecting plate is fixed to the cylinder of the cylinder assembly. The crossbeam is fixedly connected to a first pressure claw adjustment block and a second pressure claw adjustment block arranged in parallel with each other. The first pressure claw adjustment block and the second pressure claw adjustment block are respectively provided with transverse long U-shaped countersunk holes. The first pressure claw adjustment block and the second pressure claw adjustment block are fixedly connected to the pressure claw assembly through the transverse long U-shaped countersunk holes to adjust the transverse position of the pressure claw assembly. The limit assembly is fixedly connected to the base assembly. The position of the limit assembly is set corresponding to the pressure claw assembly. The soft-pack battery assembly is placed between the limit assembly and the pressure claw assembly. The base assembly is fixedly connected to the laser welding machine platform.

2. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: The base assembly includes a base, a first height pad and a second height pad fixedly connected in sequence from bottom to top. The second height pad is provided with 28 adjustment holes, and the position of the limit assembly is adjusted by adjusting the position of the holes.

3. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: The cylinder assembly includes a cylinder, a cylinder fixing plate, a first rib plate, a second rib plate and a cylinder bottom plate. The cylinder bottom plate is vertically fixed to the cylinder fixing plate. The first rib plate and the second rib plate are fixed at the connection between the cylinder bottom plate and the cylinder fixing plate. The cylinder is fixed to the cylinder fixing plate.

4. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: A first reinforcing rib and a second reinforcing rib are fixedly connected at a connection point between the connecting plate and the cross beam of the pressure claw positioning assembly.

5. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: The first pressure jaw adjusting block and the second pressure jaw adjusting block are respectively provided with longitudinal long U-shaped countersunk holes along their length directions for adjusting the longitudinal position of the pressure jaw assembly.

6. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: The pressure claw assembly includes a mounting seat, a connecting block, a connecting shaft, a pressure claw and a spring. The mounting seat is provided with a spring mounting hole and a fixed circular hole. The mounting seat is fixedly connected to the pressure claw adjustment block by a screw passing through the fixed circular hole. The connecting block and the pressure claw are pin-connected by a connecting shaft. A spring is placed in the spring mounting hole between the connecting block and the pressure claw. A fixed copper sleeve is fixedly connected in the fixed circular hole.

7. The vertical laser welding tool for multi-series and parallel soft-pack battery packs according to claim 1 is characterized by: The limiting assembly includes a support block, a transverse limiting block and a longitudinal limiting block, wherein the transverse limiting block is fixedly connected to the front end side wall of the support block, and the longitudinal limiting block is fixedly connected to the left side wall of the support block. The transverse limiting block and the longitudinal limiting block respectively limit the transverse and longitudinal positions of the soft-pack battery assembly, and a longitudinal long U-shaped countersunk hole is provided on the support block along its radial direction, and a transverse long U-shaped countersunk hole is provided on the support block along its axial direction.

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