Double-sided liquid cooling grouping device for cylindrical battery cells

Abstract

The utility model relates to the field of cylindrical battery cell stacking, in particular to a double-sided liquid cooling grouping device for cylindrical battery cells, which comprises a bottom plate, a first positioning end, a second positioning end and a stacking assembly, the stacking assembly is connected with the first positioning end, and the stacking assembly is connected with the second positioning end; the first positioning end and the second positioning end are oppositely arranged, the first positioning end is slidably connected with the bottom plate, and the second positioning end is slidably connected with the bottom plate; the first positioning end and the second positioning end can be close to or away from each other; the first positioning end and the second positioning end are arranged on the bottom plate in a sliding manner, and the distance between the first positioning end and the second positioning end can be adjusted through relative sliding of the first positioning end and the second positioning end, so that the double-sided liquid cooling grouping device for the cylindrical battery cells can adapt to grouping operation of battery cell modules of different specifications; the operability and the flexibility of the double-sided liquid cooling grouping device for the cylindrical battery cell are improved, and the manufacturing time and the manufacturing cost of a tool are saved.

Description

Technical Field

[0001] The utility model relates to the field of cylindrical battery core stacking, in particular to a double-sided liquid cooling grouping device for cylindrical battery cores. Background Art

[0002] When the cylindrical battery cells are stacked in groups for double-sided liquid cooling, the battery cells and the liquid cooling plate need to be placed in layers and fixed with glue to ensure close contact between the liquid cooling plate and the cylindrical battery cells.

[0003] However, since double-sided liquid-cooled battery cells have various specifications, and the currently used grouping tooling is designed based on a single battery pack specification, the positioning end of the grouping tooling cannot be moved, resulting in poor compatibility of the grouping tooling for battery packs of different specifications, resulting in the need to replace different grouping tooling when grouping battery packs of different specifications; the development cost of the battery cell stacking tooling is relatively high.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problem that the currently used grouping tooling has poor compatibility with the grouping operations of battery packs of different specifications. Utility Model Content

[0005] The purpose of the utility model is to provide a double-sided liquid-cooled grouping device for cylindrical batteries in order to solve the technical problem that the currently used grouping tooling has poor compatibility with the grouping operation of battery packs of different specifications.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A double-sided liquid-cooling grouping device for a cylindrical battery cell, comprising a bottom plate, a first positioning end, a second positioning end and a stacking assembly; the stacking assembly is connected to the first positioning end, and the stacking assembly is connected to the second positioning end;

[0008] The first positioning end and the second positioning end are arranged opposite to each other, the first positioning end is slidably connected to the bottom plate, and the second positioning end is slidably connected to the bottom plate; the first positioning end and the second positioning end can be close to or away from each other.

[0009] The utility model discloses a double-sided liquid-cooling grouping device for cylindrical battery cells. During grouping operation, a battery box is placed between a first positioning end and a second positioning end. The first positioning end and the second positioning end are relatively arranged. By moving the first positioning end and the second positioning end, the spacing between the first positioning end and the second positioning end can be adjusted, so that the double-sided liquid-cooling grouping device for cylindrical battery cells can be suitable for battery boxes of different specifications. By replacing stacking components of different specifications, the double-sided liquid-cooling grouping device for cylindrical battery cells can be used for grouping operations of battery boxes of different specifications, thereby improving the operability and flexibility of the double-sided liquid-cooling grouping device for cylindrical battery cells.

[0010] As a preferred embodiment of the utility model, the stacking assembly includes a movable stacking plate and a fixed stacking plate, one end of the movable stacking plate is detachably connected to the first positioning end, and the other end is detachably connected to the second positioning end; one end of the fixed stacking plate is detachably connected to the first positioning end, and the other end is detachably connected to the second positioning end, and both the fixed stacking plate and the movable stacking plate can abut against a liquid cooling plate. By replacing fixed stacking plates and mobile stacking plates of different specifications, the double-sided liquid cooling grouping device of cylindrical battery cells can group battery cell modules of different specifications; the movable stacking plates and the fixed stacking plates can abut against different liquid cooling plates respectively, and the liquid cooling plates are squeezed against the battery cells by the fixed stacking plates and the movable stacking plates to ensure that the liquid cooling plates are in contact with the battery cells, so that the liquid cooling plates can dissipate heat well for the battery cells.

[0011] As a preferred solution of the utility model, the first positioning end includes a first positioning plate, the first positioning plate is slidably connected to the bottom plate, the first positioning plate is provided with a first guide rail and a limiting assembly, the first guide rail is slidably provided with a first slider and a second slider, the limiting assembly can be limitedly connected with the second slider, the first slider is connected to the fixed stacking plate, and the second slider is connected to the movable stacking plate; the first slider can be limitedly connected with the first positioning plate. By sliding the first slider and the second slider on the first guide rail, the spacing between the first slider and the second slider can be adjusted, and the battery cell module can be grouped by changing the spacing between the first slider and the second slider; the first limiting pin fixes the first slider on the first guide rail, so that the fixed stacking plate is fixed at the starting position of the battery cell grouping operation, and by sliding the second slider on the first guide rail, the movable end stacking plate can push the liquid cooling plate to make the liquid cooling plate abut against the battery cell, and when the second slider moves to abut or clamp with the limiting assembly, it is judged that the battery cell is in contact with the liquid cooling plate and reaches the predetermined glue pressing position.

[0012] As a preferred solution of the utility model, the limit assembly includes a base and a plurality of positioning pins, the base is connected to the first positioning plate, the positioning pins are slidably connected to the base, and any of the positioning pins can abut against the second slider. By using different limit pins to abut against the second slider, liquid cooling plates at different levels and battery cells at different levels can abut against each other, so that all battery cells in the battery box can abut against the liquid cooling plate.

[0013] As a preferred solution of the utility model, a plurality of positioning pins are arranged on the base, and the positioning pins penetrate the base. The spacing between any adjacent positioning pins is equal, and the positioning pins enable the cells in each layer to abut against each other, thereby ensuring the quality of the cell grouping. The arrangement direction of the positioning pins is the same as the sliding direction of the first guide rail, which is convenient for controlling the position of the second slider.

[0014] As a preferred solution of the utility model, the second positioning end includes a second positioning plate, the second positioning plate is provided with a push assembly and a second guide rail, the second guide rail is slidingly provided with a third slider and a fourth slider, the fourth slider is provided with a connecting portion, the connecting portion is connected to the push assembly, the movable stacking plate is connected to the fourth slider, the fixed movable stacking plate is connected to the third slider, and the third slider can be connected with the second positioning plate in a limited position. The third slider and the fourth slider can both slide on the second guide rail, and the third slider is provided with a second limit pin; the third slider is connected with the second positioning plate in a limited position by the second limit pin, so that the third slider can be fixed in a predetermined position of the guide rail, so that the fixed stacking plate can be fixed in the starting position of the battery cell stacking; the fourth slider is pushed to move by the push assembly, so that the movable stacking plate can push the liquid cooling plate to contact the battery cell.

[0015] As a preferred solution of the utility model, the push assembly includes a screw, a first screw seat, a second screw seat and a displacement block, the screw is parallel to the second guide rail, the first screw seat and the second screw seat are respectively located at the two ends of the screw, the first screw seat and the second screw seat are both connected to the second positioning plate, the screw is rotatably connected to the first screw seat, the screw is rotatably connected to the second screw seat, the screw passes through the displacement block, and the displacement block is adaptively connected to the screw. The first screw seat and the second screw seat can provide good support for the screw to prevent the screw from being deformed and offset due to force; the displacement block is moved on the screw by rotating the screw, and the fourth slider is pushed by the displacement block through the displacement block push connection portion, so that the fourth slider moves on the second guide rail, so that the movable stacking plate can push the liquid cooling plate to keep the liquid cooling plate in contact with the battery cell.

[0016] As a preferred solution of the utility model, the connection part is provided with a force sensor, and the force sensor is in contact with the displacement block. By providing the force sensor to monitor the thrust of the displacement block on the fourth slider, it is avoided that the mobile stacking plate over-compresses the battery cell and causes a safety accident.

[0017] As a preferred solution of the utility model, the first positioning end is provided with a first limiter, the second positioning end is provided with a second limiter, the first limiter is connected to the bottom plate in a limiter manner, and the second limiter is connected to the bottom plate in a limiter manner. By providing the first limiter and the second limiter, the first positioning end and the second positioning end can be fixed at predetermined positions on the bottom plate. When in use, the first positioning end and the second positioning end are moved so that the positions of the first positioning end and the second positioning end on the bottom plate are adapted to the modules to be stacked, and then the first positioning end and the second positioning end are fixed to the bottom plate by the first limiter and the second limiter, so as to avoid positional displacement of the first positioning end and the second positioning end when the battery cells are stacked.

[0018] As a preferred solution of the utility model, the base plate is provided with a first linear guide and a second linear guide, the first linear guide is slidably connected to the first positioning end, the second linear guide is slidably connected to the second positioning end, and the first linear guide and the second linear guide are parallel to each other. The first guide and the second guide are provided on the base plate, the first guide and the second guide are parallel to each other, the first positioning end can be guided and moved along the first guide, and the second positioning end can be guided and moved along the second guide, so that the first positioning end and the second positioning end can be close to each other or away from each other; the first guide and the second guide guide guide the first positioning end and the second positioning end, so that the first positioning end and the second positioning end can be displaced along a predetermined direction.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. The utility model discloses a double-sided liquid-cooled grouping device for cylindrical cells. The battery box is placed between a first positioning end and a second positioning end during grouping. The first positioning end and the second positioning end are arranged relative to each other. By moving the first positioning end and the second positioning end, the spacing between the first positioning end and the second positioning end can be adjusted, so that the double-sided liquid-cooled grouping device for cylindrical cells can be applied to battery boxes of different specifications. By replacing stacking components of different specifications, the double-sided liquid-cooled grouping device for cylindrical cells can be used for grouping operations of battery boxes of different specifications, thereby improving the operability and flexibility of the double-sided liquid-cooled grouping device for cylindrical cells.

[0021] 2. The utility model provides a double-sided liquid-cooled grouping device for cylindrical battery cells. By slidingly setting the first positioning end and the second positioning end on the bottom plate, the first positioning end and the second positioning end slide relative to each other, so that the distance between the first positioning end and the second positioning end can be adjusted, thereby enabling the double-sided liquid-cooled grouping device for cylindrical battery cells to adapt to the grouping operation of battery cell modules of different specifications, improving the operability and flexibility of the double-sided liquid-cooled grouping device for cylindrical battery cells, saving the production time and cost of tooling, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a double-sided liquid-cooling grouping device for a cylindrical battery cell in Example 1;

[0023] Figure 2 is a schematic structural diagram of the first positioning end of Example 1;

[0024] Figure 3 is a schematic structural diagram of the second positioning end of Example 1;

[0025] Figure 4It is a structural schematic diagram of a double-sided liquid-cooled grouping device for a cylindrical battery cell in Example 4.

[0026] icon:

[0027] 1-first positioning end, 2-second positioning end, 3-bottom plate, 4-stacking assembly, 5-first limiting member, 6-second limiting member, 7-first linear guide, 8-second linear guide, 9-battery box bracket, 11-first positioning plate, 12-first guide rail, 13-first slider, 14-second slider, 15-limiting assembly, 16-first limiting pin, 21-second positioning plate, 22-pushing assembly, 23-second guide rail, 24-third slider, 25-fourth slider, 26-connecting part, 27-force sensor, 28-second limiting pin, 41-movable stacking plate, 42-fixed stacking plate, 151-base, 152-positioning pin, 221-screw, 222-first screw seat, 223-second screw seat, 224-displacement block, 100-support frame, 101-guide wheel. DETAILED DESCRIPTION

[0028] The utility model is described in detail below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Example 1

[0031] like Figure 1-Figure 3 A double-sided liquid-cooled grouping device for a cylindrical battery cell shown in the figure comprises a bottom plate 3, a first positioning end 1, a second positioning end 2 and a stacking assembly 4; the stacking assembly 4 is connected to the first positioning end 1, and the stacking assembly 4 is connected to the second positioning end 2;

[0032] The first positioning end 1 and the second positioning end 2 are arranged opposite to each other, the first positioning end 1 is slidably connected to the bottom plate 3, and the second positioning end 2 is slidably connected to the bottom plate 3; the first positioning end 1 and the second positioning end 2 can be close to or away from each other.

[0033] The battery case is placed between the first positioning end 1 and the second positioning end 2 during grouping operations. The first positioning end 1 and the second positioning end 2 are relatively arranged, and the first positioning end 1 and the second positioning end 2 can be moved so that the distance between the first positioning end 1 and the second positioning end 2 can be adjusted, so that the double-sided liquid-cooled grouping device of the cylindrical battery cell can be suitable for battery cases of different specifications; by replacing stacking components 4 of different specifications, the double-sided liquid-cooled grouping device of the cylindrical battery cell can be used for grouping operations of battery cases of different specifications, thereby improving the operability and flexibility of the double-sided liquid-cooled grouping device of the cylindrical battery cell.

[0034] Specifically, the stacking assembly 4 is composed of a movable stacking plate 41 and a fixed stacking plate 42, one end of the movable stacking plate 41 is detachably connected to the first positioning end 1, and the other end is detachably connected to the second positioning end 2; one end of the fixed stacking plate 42 is detachably connected to the first positioning end 1, and the other end is detachably connected to the second positioning end 2, and both the fixed stacking plate 42 and the movable stacking plate 41 can abut against the liquid cooling plate; by replacing the movable stacking plates 41 and the fixed stacking plates 42 of different lengths, the movable stacking plates 41 and the fixed stacking plates 42 can be adapted to different specifications of battery cell modules for grouping operations; the fixed stacking plate 42 can position the liquid cooling plate, so that the fixed stacking plate 42 serves as the starting position for battery cell grouping.

[0035] Specifically, the first positioning end 1 is composed of a first positioning plate 11, a first guide rail 12, a first slider 13, a second slider 14 and a limiting assembly 15. The first positioning plate 11 is slidably connected to the bottom plate 3, the first guide rail 12 is connected to the first positioning plate 11, and the limiting assembly 15 is connected to the first positioning plate 11; the first slider 13 and the second slider 14 are both slidably connected to the first guide rail 12, the first slider 13 is connected to the fixed stacking plate 42, and the second slider 14 is connected to the movable stacking plate 41; the first slider 13 is provided with a first limiting pin 16, and the first limiting pin 16 is limitedly connected to the first positioning plate 11; the limiting assembly 15 can be limitedly connected to the second slider 14; The first slider 13 and the second slider 14 slide on the first guide rail 12, so that the distance between the first slider 13 and the second slider 14 can be adjusted, and the battery cell modules can be grouped by changing the distance between the first slider 13 and the second slider 14; the first limit pin 16 fixes the first slider 13 on the first guide rail 12, so that the fixed stacking plate 42 is fixed at the starting position of the battery cell grouping operation, and the second slider 14 slides on the first guide rail 12, so that the movable end stacking plate can push the liquid cooling plate to make the liquid cooling plate abut against the battery cell, and when the second slider 14 moves to abut against the limit assembly 15, it is determined that the battery cell is in abutment with the liquid cooling plate.

[0036] Specifically, the limiting assembly 15 includes a base 151 and a plurality of positioning pins 152. The positioning pins 152 penetrate the base 151. The base 151 is connected to the first positioning plate 11. The positioning pins 152 are slidably connected to the base 151. Any positioning pin 152 can abut against the second slider 14. Along the direction of the first guide rail 12, a plurality of positioning pins 152 are arranged on the base 151. By slidingly connecting the plurality of positioning pins 152 to the base 151, the intervals between adjacent positioning pins 152 are equal. By using different positioning pins 152 to abut against the second slider 14, the second slider 14 can be limited at different positions, so that different layers can abut against the battery cells and the liquid cooling plate, thereby preventing the battery cells or the liquid cooling plate from cracking due to overpressure.

[0037] Specifically, the second positioning end 2 is composed of a second positioning plate 21, a push assembly 22, a second guide rail 23, a third slider 24 and a fourth slider 25. The second positioning plate 21 is slidably connected to the bottom plate 3, the second guide rail 23 is connected to the second positioning plate 21, and the push assembly 22 is connected to the second positioning plate 21; the third slider 24 and the fourth slider 25 are both slidably connected to the second guide rail 23, the third slider 24 is provided with a second limiting pin 28, and the second limiting pin 28 is limitedly connected to the second positioning plate 21; the fourth slider 25 is provided with a connecting portion 26, and the connecting portion 26 is connected to the push assembly 22 The movable stacking plate 41 is connected to the fourth slider 25, and the fixed movable stacking plate 41 is connected to the third slider 24; the third slider 24 and the fourth slider 25 can both slide on the second guide rail 23, and a second limit pin 28 is provided on the third slider 24; the second limit pin 28 is limitedly connected with the second positioning plate 21, so that the third slider 24 can be fixed in a predetermined position of the guide rail, so that the fixed stacking plate 42 can be fixed in the starting position of the battery cell stacking; the fourth slider 25 is pushed to move by the push assembly 22, so that the movable stacking plate 41 can push the liquid cooling plate to contact the battery cell.

[0038] Specifically, the push assembly 22 includes a screw rod 221, a first screw rod seat 222, a second screw rod seat 223 and a displacement block 224. The screw rod 221 is parallel to the second guide rail 23. The first screw rod seat 222 and the second screw rod seat 223 are respectively located at the two ends of the screw rod 221. The first screw rod seat 222 and the second screw rod seat 223 are both connected to the second positioning plate 21. The screw rod 221 is rotatably connected to the first screw rod seat 222. The screw rod 221 is rotatably connected to the second screw rod seat 223. The screw rod 221 passes through the displacement block 224, and the displacement block 224 is adaptively connected to the screw rod 221. By rotating the screw rod 221, the position of the displacement block 224 on the screw rod 221 is changed, so that the displacement block 224 can push the connecting part 26, thereby applying force to the fourth slider 25; a force sensor 27 is provided on the connecting part 26, and the force sensor 27 is in contact with the displacement block 224. The force sensor 27 measures the force applied by the displacement block 224 to the connecting part 26, so that the operator can make timely adjustments to the screw rod 221 according to the force of the force sensor 27, so as to avoid excessive force to damage the battery cell or liquid cooling plate.

[0039] Specifically, the first guide rail 12 and the second guide rail 23 are parallel to each other, so that the first slider 13 and the third slider 24 can move synchronously, and the second slider 14 and the fourth slider 25 can move synchronously.

[0040] Specifically, a first limiting member 5 is provided at the first positioning end 1, and a second limiting member 6 is provided at the second positioning end 2. The first limiting member 5 is connected to the bottom plate 3 in a limiting manner, and the second limiting member 6 is connected to the bottom plate 3 in a limiting manner. By providing the first limiting member 5 and the second limiting member 6, the first positioning end 1 and the second positioning end 2 can be fixed at a predetermined position on the bottom plate 3. When in use, the first positioning end 1 and the second positioning end 2 are moved so that the positions of the first positioning end 1 and the second positioning end 2 on the bottom plate 3 are adapted to the battery box body. The first positioning end 1 and the second positioning end 2 are fixed to the bottom plate 3 by the first limiting member 5 and the second limiting member 6 to avoid positional displacement of the first positioning end 1 and the second positioning end 2.

[0041] Specifically, the base plate 3 is provided with a first linear guide 7 and a second linear guide 8, the first linear guide 7 is slidably connected to the first positioning end 1, the second linear guide 8 is slidably connected to the second positioning end 2, and the first linear guide 7 and the second linear guide 8 are parallel to each other; the first guide rail 12 and the second guide rail 23 are provided on the base plate 3, the first guide rail 12 and the second guide rail 23 are parallel to each other, the first positioning end 1 can be guided and moved along the first guide rail 12, and the second positioning end 2 can be guided and moved along the second guide rail 23, so that the first positioning end 1 and the second positioning end 2 can be close to each other or move away from each other; the first guide rail 12 and the second guide rail 23 guide the first positioning end 1 and the second positioning end 2, so that the first positioning end 1 and the second positioning end 2 can be displaced along a predetermined direction.

[0042] Specifically, two first linear guides 7 are provided, and the two first linear guides 7 are parallel to each other; two second linear guides 8 are provided, and the two second linear guides 8 are parallel to each other; by providing two first linear guides 7, the sliding stability of the first positioning end 1 is improved to avoid positional displacement; by providing two second linear guides 8, the sliding stability of the second positioning end 2 is improved to avoid positional displacement.

[0043] Specifically, a battery box support 9 is further provided on the bottom plate 3 , and the battery box support 9 is located between the first positioning end 1 and the second positioning end 2 , and the battery box support 9 is used for clamping and supporting the battery box.

[0044] Specifically, the model of the force sensor 27 is QT-HF / F04C-2t.

[0045] The operating steps of a double-sided liquid cooling grouping device for a cylindrical battery cell are as follows:

[0046] a. Install the battery box bracket 9 on the bottom plate 3 according to the positioning reference, and then install the battery box on the battery box bracket 9 according to the positioning reference.

[0047] b. Place the first liquid cooling plate on the fixed stacking plate 42 according to the positioning reference, place the first row of battery cells against the first liquid cooling plate, and then place the second liquid cooling plate, move the first positioning pin 152 on the left side to the forward state and the other positioning pins 152 to the backward state, rotate the screw rod 221 to push the mobile stacking plate 41 until the first positioning pin 152 on the left side abuts against the second slider 14, so that the first liquid cooling plate and the second liquid cooling plate clamp the battery cells together.

[0048] c. After the first row of battery cells are glued, loosen the retracting screw 221 to separate the displacement block 224 from the connecting portion 26, push the mobile stacking plate 41 to the side away from the battery cells, and set the second positioning pin 152 on the left to the forward state, then place the second row of battery cells and the third liquid cooling plate, rotate the screw 221 to push the mobile stacking plate 41 until the second positioning pin 152 on the left abuts against the second slider 14, so that the second liquid cooling plate and the third liquid cooling plate clamp the battery cells together.

[0049] d. Assemble the liquid cooling plate and the battery cells in sequence according to the above steps. The side positioning pins 152 are used to control the spacing of each row of battery cells.

[0050] e. After stacking is completed, pour the structural glue and observe the flow of the glue.

[0051] Example 2

[0052] The double-sided liquid-cooling grouping device of a cylindrical battery cell in this embodiment has a structure substantially the same as that of Embodiment 1, except that one first linear guide rail 7 and one second linear guide rail 8 are provided.

[0053] Example 3

[0054] The double-sided liquid-cooling grouping device of a cylindrical battery cell in this embodiment has a structure that is substantially the same as that of Embodiment 1. The difference from Embodiment 1 is that a first slide groove and a second slide groove are provided on a base plate 3, the first positioning end 1 is adaptively connected to the first slide groove, and the second slide groove is slidably connected to the second positioning end 2.

[0055] Example 4

[0056] like Figure 4 The double-sided liquid-cooled grouping device of a cylindrical battery cell shown in the figure has a structure substantially the same as that of the first embodiment, except that a support frame 100 is provided at the bottom of the base plate 3 .

[0057] Specifically, a guide wheel 101 is provided at the bottom of the support frame 100 .

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided liquid cooling grouping device for cylindrical battery cells, characterized in that: It comprises a bottom plate (3), a first positioning end (1), a second positioning end (2) and a stacking assembly (4); the stacking assembly (4) is connected to the first positioning end (1), and the stacking assembly (4) is connected to the second positioning end (2); The first positioning end (1) and the second positioning end (2) are arranged opposite to each other; the first positioning end (1) is slidably connected to the bottom plate (3), and the second positioning end (2) is slidably connected to the bottom plate (3); the first positioning end (1) and the second positioning end (2) can move closer to or farther from each other.

2. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 1, characterized in that: The stacking assembly (4) comprises a movable stacking plate (41) and a fixed stacking plate (42); one end of the movable stacking plate (41) is detachably connected to the first positioning end (1), and the other end is detachably connected to the second positioning end (2); one end of the fixed stacking plate (42) is detachably connected to the first positioning end (1), and the other end is detachably connected to the second positioning end (2); the fixed stacking plate (42) and the movable stacking plate (41) are both capable of abutting against a liquid cooling plate.

3. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 2, characterized in that: The first positioning end (1) comprises a first positioning plate (11), the first positioning plate (11) is slidably connected to the bottom plate (3), the first positioning plate (11) is provided with a first guide rail (12) and a limiting assembly (15), the first guide rail (12) is slidably provided with a first slider (13) and a second slider (14), the limiting assembly (15) can be connected to the second slider (14) in a limiting manner, the first slider (13) is connected to the fixed stacking plate (42), and the second slider (14) is connected to the movable stacking plate (41); the first slider can be connected to the first positioning plate (11) in a limiting manner.

4. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 3, characterized in that: The limiting assembly (15) comprises a base (151) and a plurality of positioning pins (152); the base (151) is connected to the first positioning plate (11); the positioning pins (152) are slidably connected to the base (151); and any of the positioning pins (152) can abut against the second sliding block (14).

5. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 4, characterized in that: A plurality of positioning pins (152) are arranged in an array on the base (151), and the positioning pins (152) penetrate the base (151).

6. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 2, characterized in that: The second positioning end (2) comprises a second positioning plate (21), the second positioning plate (21) is provided with a push assembly (22) and a second guide rail (23), the second guide rail (23) is slidably provided with a third slider (24) and a fourth slider (25), the fourth slider (25) is provided with a connecting portion (26), the connecting portion (26) is connected to the push assembly (22), the movable stacking plate (41) is connected to the fourth slider (25), the fixed movable stacking plate (41) is connected to the third slider (24), and the third slider (24) can be connected to the second positioning plate (21) in a limiting manner.

7. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 6, characterized in that: The push assembly (22) comprises a screw rod (221), a first screw rod seat (222), a second screw rod seat (223) and a displacement block (224); the screw rod (221) is parallel to the second guide rail (23); the first screw rod seat (222) and the second screw rod seat (223) are respectively located at two ends of the screw rod (221); the first screw rod seat (222) and the second screw rod seat (223) are both connected to the second positioning plate (21); the screw rod (221) is rotatably connected to the first screw rod seat (222); the screw rod (221) is rotatably connected to the second screw rod seat (223); the screw rod (221) passes through the displacement block (224); and the displacement block (224) is adaptively connected to the screw rod (221).

8. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 7, characterized in that: The connection portion (26) is provided with a force sensor (27), and the force sensor (27) abuts against the displacement block (224).

9. A double-sided liquid-cooled grouping device for cylindrical battery cells according to any one of claims 1 to 8, characterized in that: The first positioning end (1) is provided with a first limiting member (5), the second positioning end (2) is provided with a second limiting member (6), the first limiting member (5) is connected to the bottom plate (3) in a limiting manner, and the second limiting member (6) is connected to the bottom plate (3) in a limiting manner.

10. A double-sided liquid-cooled grouping device for cylindrical battery cells as claimed in claim 9, characterized in that: The base plate (3) is provided with a first linear guide rail (7) and a second linear guide rail (8); the first linear guide rail (7) is slidably connected to the first positioning end (1); the second linear guide rail (8) is slidably connected to the second positioning end (2); the first linear guide rail (7) and the second linear guide rail (8) are parallel to each other.

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