Battery cell pairing system and pairing method

Abstract

This invention belongs to the field of battery manufacturing technology and discloses a cell pairing system and method. The cell pairing system includes a feeding mechanism and two cell clamps. One clamp holds a cell body placed along the +X direction, and the other holds a cell body placed along the -X direction. Both clamps are movable along the X direction, and at least one clamp is movable along the Z direction to allow the two clamps to interchange positions. Each clamp includes a drive mechanism and two opposing grippers. The output end of the drive mechanism is connected to at least one gripper to bring adjacent grippers closer together and clamp the cell body. The feeding mechanism places cell bodies into the two clamps. This cell pairing system can complete the pairing of two pairs of cell bodies in one operation, thus quickly pairing cell bodies, improving work efficiency, and has a smaller footprint and lower cost.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a cell pairing system and pairing method. Background Technology

[0002] As lithium battery manufacturing becomes increasingly mature, its application areas are constantly evolving, and demand is growing. A single lithium-ion battery typically contains multiple cells connected in parallel or series. To ensure smooth operation of the entire lithium-ion battery, the consistency of the multiple cells must be high; otherwise, the lithium-ion battery will experience rapid performance degradation during use, severely impacting the user experience.

[0003] In existing technologies, when cells are paired, they are first transported to a cell rotation mechanism to rotate them so that the two cells to be paired appear as A / B side cells. After rotation, the cells are sent back to the pairing mechanism for stacking and pairing. The multiple round trips of transporting cells will increase the working time and reduce the work efficiency. In addition, the separate cell rotation mechanism requires an additional workstation, which takes up a large area.

[0004] Therefore, there is an urgent need to provide a new type of battery cell pairing system and pairing method to solve the above-mentioned technical problems in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a battery cell pairing system that can quickly pair battery cells, improve work efficiency, and has a smaller footprint and lower cost.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The battery cell pairing system includes a feeding mechanism and two battery cell clamps. One of the two clamps is used to clamp a battery cell body placed along the +X direction, and the other is used to clamp a battery cell body placed along the -X direction. Both of the battery cell clamps are capable of moving along the X direction, and at least one of the battery cell clamps is capable of moving along the Z direction, so that the positions of the two battery cell clamps can be interchanged. Each battery cell clamp includes a drive mechanism and two opposing grippers. The output end of the drive mechanism is connected to at least one of the grippers, so that two adjacent grippers move closer to each other and clamp and fix the battery cell body. The feeding mechanism is used to place the battery cell body into the two battery cell clamps respectively.

[0008] Optionally, one of the two grippers is a fixed gripper, which is fixed to the clamping seat of the battery cell clamp, and the other is a movable gripper, which is connected to the output end of the drive mechanism.

[0009] Optionally, the drive mechanism includes a first drive member, a push rod, a connecting rod, and an elastic member. The push rod is connected to the output end of the first drive member. One end of the connecting rod is connected to the push rod, and the other end is connected to the movable gripper. The first drive member is used to drive the push rod to move in the Y direction, so that the connecting rod rotates and drives the movable gripper to move in the X direction. The movable gripper can move closer to or further away from the fixed gripper in the X direction.

[0010] Optionally, either the clamp seat or the push rod is provided with a first slide rail extending in the Y direction, and the other is provided with a first slide groove extending in the Y direction that is slidably connected to the first slide rail.

[0011] Optionally, either the clamping seat or the movable gripper is provided with a second slide rail extending in the X direction, and the other is provided with a slider extending in the Y direction that is slidably connected to the second slide rail.

[0012] Optionally, the above-mentioned cell pairing system further includes a pairing bracket, which is provided with a first pairing slide rail and a second pairing slide rail that both extend along the X direction. The first pairing slide rail and the second pairing slide rail have different height positions in the Z direction. The pairing bracket is also provided with a first pairing drive and a second pairing drive. One of the two cell clamps is connected to the output end of the first pairing drive and slidably connected to the first pairing slide rail, and the other is connected to the output end of the second pairing drive and slidably connected to the second pairing slide rail.

[0013] Optionally, both the first pairing drive member and the second pairing drive member include a drive motor, the output end of the drive motor is connected to a ball screw extending in the X direction, and the bottom of the battery cell clamp is provided with a drive block that cooperates with the ball screw.

[0014] Optionally, the pairing bracket is further provided with a lifting cylinder, the output end of which is connected to at least one of the two battery cell clamps.

[0015] Optionally, the aforementioned battery cell clamp is equipped with an X-direction displacement sensor and a Z-direction displacement sensor. The X-direction displacement sensor is used to detect the displacement of the battery cell clamp along the X-direction, and the Z-direction displacement sensor is used to detect the displacement of the battery cell clamp along the Z-direction.

[0016] Another object of the present invention is to provide a battery cell pairing method for use in a battery cell pairing system as described in any of the above embodiments, comprising the steps of: S1, battery cell loading: the loading mechanism places one of the battery cell bodies along the +X direction into one of the battery cell clamps for clamping and fixing, and places another of the battery cell bodies along the -X direction into another of the battery cell clamps for clamping and fixing; S2, battery cell pairing: one of the battery cell clamps moves along the Z direction, and both of the battery cell clamps move simultaneously along the X direction, so that the positions of the two battery cell clamps are interchanged, at which point the pairing is completed. S3. Secondary feeding of cells: The feeding mechanism places one of the cells in a cell clamp along the +X direction and clamps it in a cell clamp, and places the other cell in a cell clamp along the -X direction and clamps it in another cell clamp; S4. Cell pairing and resetting: One of the cell clamps moves along the Z direction, and the two cell clamps move simultaneously along the X direction to interchange the positions of the two cell clamps. At this time, the pairing of the second pair of cells is completed and the two cell clamps are reset.

[0017] Beneficial effects:

[0018] The battery cell pairing system of this invention places battery cell bodies into two battery cell clamps via a feeding mechanism, allowing each clamp to hold two battery cell bodies. The two battery cell bodies are positioned along the -X and +X directions, respectively. Since at least one clamp can move along the Z direction, a height difference exists between the two clamps. The two clamps move relative to each other along the X direction, moving to each other's positions while holding the battery cell bodies. Then, the clamp capable of Z-direction movement adjusts its height in the Z direction, bringing the two battery cell bodies to the same height, thus achieving positional interchange and orientation adjustment. The original battery cell tabs facing away from each other are adjusted to face towards each other. Through the close connection of the four battery cell tabs of the two battery cell bodies, pairing of a pair of battery cell bodies is completed. After pairing, the two paired battery cell bodies 10 are removed. During the resetting process of the two clamps, two more battery cell bodies can be placed, completing the pairing of a second pair of battery cell bodies simultaneously. This cell pairing system can complete the pairing of two pairs of cell bodies in one working and reset process, thereby quickly pairing the cell bodies and improving work efficiency. In addition, this cell pairing system does not require the use of a cell flipping device, so it has a smaller footprint and lower manufacturing and use costs. Attached Figure Description

[0019] Figure 1 This is an isometric view of the cell pairing system provided in a specific embodiment of the present invention;

[0020] Figure 2 This is an isometric view of a portion of the structure of the battery cell clamp provided in a specific embodiment of the present invention;

[0021] Figure 3 This is an isometric view of the cell pairing system provided in a specific embodiment of the present invention from another perspective.

[0022] In the picture:

[0023] 10. Battery cell body;

[0024] 100. Battery cell clamp; 101. Drive mechanism; 1011. First drive component; 102. Clamp base; 103. X-direction displacement sensor; 104. Z-direction displacement sensor; 105. Material level sensor; 110. Gripper; 111. Fixed gripper; 112. Movable gripper; 113. Slider; 114. Second slide rail; 120. Push rod; 121. First slide rail; 130. Connecting rod; 140. Elastic element;

[0025] 200. Paired bracket; 201. First paired slide rail; 202. Second paired slide rail; 210. First paired drive component; 211. Ball screw; 212. Drive block; 220. Second paired drive component; 230. Lifting cylinder. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0030] like Figures 1 to 3 As shown, in this embodiment, the X and Y directions are both horizontal and perpendicular to each other, while the Z direction is vertical, and the X, Y, and Z directions are perpendicular to each other. Here, when the cell body 10 is placed along the +X direction, the cell tabs on the cell body 10 face the +X direction; when the cell body 10 is placed along the -X direction, the cell tabs on the cell body 10 face the -X direction.

[0031] Please refer to Figure 1 and Figure 2 In this embodiment, the battery cell pairing system includes a feeding mechanism and two battery cell clamps 100. One of the two battery cell clamps 100 is used to clamp a battery cell body 10 placed along the +X direction, and the other is used to clamp a battery cell body 10 placed along the -X direction. Both of the battery cell clamps 100 are capable of moving along the X direction, and at least one of the battery cell clamps 100 is capable of moving along the Z direction, so that the positions of the two battery cell clamps 100 can be interchanged. Each battery cell clamp 100 includes a driving mechanism 101 and two opposing grippers 110. The output end of the driving mechanism 101 is connected to at least one of the grippers 110, so that two adjacent grippers 110 move closer to each other and clamp and fix the battery cell body 10. The feeding mechanism is used to place the battery cell body 10 onto the two battery cell clamps 100 respectively.

[0032] In this embodiment, the cell pairing system places cell bodies 10 onto two cell clamps 100 via a feeding mechanism, so that the two cell clamps 100 respectively hold two cell bodies 10. At this time, the two cell bodies 10 are positioned along the -X and +X directions respectively. Since at least one cell clamp 100 can move along the Z direction, a height difference appears between the two cell clamps 100. The two cell clamps 100 move relative to each other along the X direction, so that while holding the cell bodies 10, the two cell clamps 100 move to each other's positions. Subsequently, the cell clamp 100 with the ability to move in the Z direction adjusts itself... The height in the Z-direction ensures that the two battery cell bodies 10 are at the same height, enabling the interchange of their positions and adjustment of their orientation. The original battery cell tabs facing away from each other are adjusted to face each other. By bringing the four battery cell tabs of the two battery cell bodies 10 closer together and connecting them, a pair of battery cell bodies 10 is finally paired. After pairing, the two paired battery cell bodies 10 are removed. During the resetting process of the two battery cell clamps 100, two more battery cell bodies 10 can be placed, and a second pair of battery cell bodies 10 can be paired simultaneously during the resetting process. This battery cell pairing system can complete the pairing of two pairs of battery cell bodies 10 in a single operation and reset process, thus quickly pairing the battery cell bodies 10 and improving work efficiency. Furthermore, this battery cell pairing system does not require a battery cell flipping device, has a smaller footprint, and lower manufacturing and operating costs.

[0033] In this embodiment, the feeding mechanism is not shown in the figure. The feeding mechanism includes a robot and two feeding lines, which respectively store the battery cell body 10 placed along the +X direction and the battery cell body 10 placed along the -X direction. The robot places the battery cell body 10 onto the corresponding battery cell fixture 100 from the feeding line.

[0034] Please continue to refer to this. Figure 1 and Figure 2 One of the two grippers 110 is a fixed gripper 111, which is fixed to the clamping seat 102 of the battery cell clamp 100. The other is a movable gripper 112, which is connected to the output end of the drive mechanism 101. In this embodiment, only one gripper 110 is set as a movable gripper 112, so that the movable gripper 112 is connected to the drive mechanism 101 to realize the movement of the movable gripper 112. As the movable gripper 112 approaches the fixed gripper 111, it achieves clamping and fixing of the battery cell body 10. Compared with the scheme in which both grippers 110 move, the above structure can simplify the structure of the drive mechanism 101, reduce the number of parts, and improve reliability.

[0035] Furthermore, the aforementioned drive mechanism 101 includes a first drive member 1011, a push rod 120, a connecting rod 130, and an elastic member 140. The push rod 120 is connected to the output end of the first drive member 1011. One end of the connecting rod 130 is connected to the push rod 120, and the other end is connected to the movable gripper 112. The first drive member 1011 is used to drive the push rod 120 to move in the Y direction, so that the connecting rod 130 rotates and drives the movable gripper 112 to move in the X direction. The movable gripper 112 can move closer to or further away from the fixed gripper 111 in the X direction. In this embodiment, the first driving member 1011 drives the push rod 120 to move along the Y direction. At this time, the connecting rod 130 connects the push rod 120 and the movable gripper 112 respectively. The connecting rod 130 itself will rotate, and the angle between the connecting rod 130 and the push rod 120 will change, thereby pushing the movable gripper 112 away from the push rod 120, so that a clamping space is created between the movable gripper 112 and the fixed gripper 111. At this time, the battery cell body 10 is placed in. Subsequently, after the push rod 120 is driven to move a certain distance, the elastic member 140 will cause the push rod 120 to return to its original position due to the elastic force. After the first driving member 1011 is released, the movable gripper 112 moves closer to the fixed gripper 111, thereby clamping the battery cell body 10. The structure of this driving mechanism 101 is simple, which can easily achieve the clamping of the battery cell body 10 and has a better fixing effect.

[0036] In this embodiment, either the clamp base 102 or the push rod 120 is provided with a first slide rail 121 extending in the Y direction, and the other is provided with a first slide groove extending in the Y direction that is slidably connected to the first slide rail 121. Specifically, in this example, the push rod 120 is provided with the first slide rail 121 extending in the Y direction, which can guide the movement of the push rod 120 and make the movement of the push rod 120 on the clamp base 102 more stable, thereby achieving a stable clamping of the battery cell body 10 and preventing displacement.

[0037] Please continue to refer to this. Figure 2 Each of the aforementioned clamp base 102 and the aforementioned movable gripper 112 is provided with a second slide rail 114 extending along the X direction, and the other is provided with a slider 113 extending along the Y direction and slidably connected to the second slide rail 114. In this embodiment, the clamp base 102 is provided with two parallel second slide rails 114, and the bottom of the movable gripper 112 is provided with two sliders 113. The cooperation of the second slide rails 114 and the sliders 113 enables the movable gripper 112 to move smoothly and guides the movement of the movable gripper 112, thereby more stably clamping the battery cell body 10.

[0038] like Figure 1 and Figure 3As shown, the above-mentioned cell pairing system also includes a pairing bracket 200. The pairing bracket 200 is provided with a first pairing slide rail 201 and a second pairing slide rail 202, both extending along the X direction. The first pairing slide rail 201 and the second pairing slide rail 202 have different height positions in the Z direction. The pairing bracket 200 is also provided with a first pairing drive member 210 and a second pairing drive member 220. One of the two cell clamps 100 is connected to the output end of the first pairing drive member 210 and slidably connected to the first pairing slide rail 201, and the other is connected to the output end of the second pairing drive member 220 and slidably connected to the second pairing slide rail 202. In this embodiment, the first pairing slide rail 201 is disposed below the second pairing slide rail 202, and there are two of each of the first pairing slide rail 201 and the second pairing slide rail 202. The two first pairing slide rails 201 are located between the two second pairing slide rails 202, so that when the two battery cell clamps 100 have a height difference and move and exchange positions in the X direction, they can avoid each other, ensuring that the various mechanisms do not affect each other and improving work efficiency.

[0039] Optionally, both the first pairing drive member 210 and the second pairing drive member 220 include a drive motor. The output end of the drive motor is connected to a ball screw 211 extending along the X direction. The bottom of the battery cell clamp 100 is provided with a drive block 212 that engages with the ball screw 211. The drive motor drives the ball screw 211 to rotate along its own axis (parallel to the X-axis of the X direction), and the drive block 212 engaged on the ball screw 211 can then translate along the X direction, thereby driving the two battery cell clamps 100 to move along the X direction.

[0040] In this embodiment, the pairing bracket 200 is further provided with a lifting cylinder 230, the output end of which is connected to at least one of the two battery cell clamps 100. Specifically, in this embodiment, only one battery cell clamp 100 is connected to the lifting cylinder 230, thereby enabling the vertical movement of one battery cell clamp 100. This allows the battery cell clamp 100 to be lowered and then pass under the other battery cell clamp 100 along the X direction, thus achieving the interchange of the positions of the two battery cell clamps 100 in the X direction.

[0041] Furthermore, the aforementioned cell clamp 100 is equipped with an X-direction displacement sensor 103 and a Z-direction displacement sensor 104. The X-direction displacement sensor 103 is used to detect the displacement of the cell clamp 100 along the X-direction, and the Z-direction displacement sensor 104 is used to detect the displacement of the cell clamp 100 along the Z-direction. Through the X-direction displacement sensor 103 and the Z-direction displacement sensor 104, the position and displacement distance of the cell clamp 100 in the X and Z directions can be detected. While the positions of the two cell clamps 100 are interchanged, the data detected by the X-direction displacement sensor 103 and the Z-direction displacement sensor 104 can be used to precisely control the movement distance of the two cell clamps 100, ensuring that the two cell bodies 10 remain aligned after the positions of the two cell clamps 100 are interchanged, facilitating subsequent cell pairing.

[0042] Furthermore, the battery cell clamp 100 is also equipped with a material level sensor 105, which can detect whether there is a battery cell body 10 on the battery cell clamp 100. Only after the battery cell bodies 10 are all placed in place can the battery cell clamp 100 be moved to achieve pairing of the two battery cell bodies 10.

[0043] Another object of the present invention is to provide a battery cell pairing method for use in a battery cell pairing system as described in any of the above embodiments, comprising the steps of: S1, battery cell loading: the loading mechanism places one of the battery cell bodies 10 along the +X direction in a battery cell clamp 100 for clamping and fixing, and places another of the battery cell bodies 10 along the -X direction in another battery cell clamp 100 for clamping and fixing;

[0044] S2. Cell Pairing: One of the aforementioned cell clamps 100 moves along the Z direction, and both of the aforementioned cell clamps 100 move simultaneously along the X direction to interchange their positions. At this time, the pairing of a pair of aforementioned cell bodies 10 is completed, and then the two aforementioned cell bodies 10 are removed. S3. Secondary Cell Loading: The aforementioned loading mechanism places one of the aforementioned cell bodies 10 along the +X direction into one of the aforementioned cell clamps 100 for clamping and fixing, and places the other of the aforementioned cell bodies 10 along the -X direction into another of the aforementioned cell clamps 100 for clamping and fixing. S4. Cell Pairing and Reset: One of the aforementioned cell clamps 100 moves along the Z direction, and both of the aforementioned cell clamps 100 move simultaneously along the X direction to interchange their positions. At this time, the pairing of the second pair of cell bodies 10 is completed, and the two of the aforementioned cell clamps 100 are reset.

[0045] In this embodiment, the cell pairing method, when using the aforementioned cell pairing system, enables two cell clamps 100 to move to each other's positions. Subsequently, the two cell clamps 100 adjust their height in the Z-direction so that the two cell bodies 10 are at the same height, achieving positional interchange and orientation adjustment, ultimately completing the pairing of one pair of cell bodies 10. During the resetting process of the two cell clamps 100, two more cell bodies 10 can be placed, completing the pairing of a second pair of cell bodies 10 simultaneously. This cell pairing method can complete the pairing of two pairs of cell bodies 10 in a single operation and reset process, thereby rapidly pairing the cell bodies 10 and improving work efficiency.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cell pairing system, characterized in that, include: Two cell clamps (100) are provided. One of the two cell clamps (100) is used to clamp a cell body (10) placed along the +X direction, and the other is used to clamp a cell body (10) placed along the -X direction. Both cell clamps (100) are capable of moving along the X direction, and at least one of the cell clamps (100) is capable of moving along the Z direction, so that the positions of the two cell clamps (100) can be interchanged. Each cell clamp (100) includes a drive mechanism (101) and two opposing jaws (110). The output end of the drive mechanism (101) is connected to at least one of the jaws (110), so that two adjacent jaws (110) move closer to each other and clamp and fix the cell body (10). The feeding mechanism is used to place the battery cell body (10) into the two battery cell clamps (100); One of the two grippers (110) is a fixed gripper (111), which is fixed to the clamp seat (102) of the battery cell clamp (100), and the other is a movable gripper (112), which is connected to the output end of the drive mechanism (101). The driving mechanism (101) includes a first driving member (1011), a push rod (120), a connecting rod (130), and an elastic member (140). The push rod (120) is connected to the output end of the first driving member (1011). One end of the connecting rod (130) is connected to the push rod (120), and the other end is connected to the movable gripper (112). The first driving member (1011) is used to drive the push rod (120) to move along the Y direction, so that the connecting rod (130) rotates and drives the movable gripper (112) to move along the X direction. The movable gripper (112) can move closer to or further away from the fixed gripper (111) along the X direction. The cell pairing system further includes a pairing bracket (200), which is provided with a first pairing slide rail (201) and a second pairing slide rail (202) that both extend along the X direction. The first pairing slide rail (201) and the second pairing slide rail (202) have different height positions in the Z direction. The pairing bracket (200) is also provided with a first pairing drive (210) and a second pairing drive (220). One of the two cell clamps (100) is connected to the output end of the first pairing drive (210) and slidably connected to the first pairing slide rail (201), and the other is connected to the output end of the second pairing drive (220) and slidably connected to the second pairing slide rail (202).

2. The cell pairing system according to claim 1, characterized in that, One of the clamp seat (102) and the push rod (120) is provided with a first slide rail (121) extending in the Y direction, and the other is provided with a first slide groove extending in the Y direction that is slidably connected to the first slide rail (121).

3. The cell pairing system according to claim 1, characterized in that, One of the clamp base (102) and the movable jaw (112) is provided with a second slide rail (114) extending in the X direction, and the other is provided with a slider (113) extending in the Y direction and slidably connected to the second slide rail (114).

4. The cell pairing system according to claim 1, characterized in that, Both the first pairing drive unit (210) and the second pairing drive unit (220) include a drive motor. The output end of the drive motor is connected to a ball screw (211) extending in the X direction. The bottom of the battery cell clamp (100) is provided with a drive block (212) that is connected to the ball screw (211).

5. The cell pairing system according to claim 1, characterized in that, The pairing bracket (200) is also provided with a lifting cylinder (230), the output end of which is connected to at least one of the two battery cell clamps (100).

6. The cell pairing system according to any one of claims 1-5, characterized in that, The cell clamp (100) is equipped with an X-direction displacement sensor (103) and a Z-direction displacement sensor (104). The X-direction displacement sensor (103) is used to detect the displacement of the cell clamp (100) along the X direction, and the Z-direction displacement sensor (104) is used to detect the displacement of the cell clamp (100) along the Z direction.

7. A cell pairing method, characterized in that, A cell pairing system as described in any one of claims 1-6, comprising the steps of: S1, Battery cell loading: The loading mechanism places one battery cell body (10) along the +X direction in one battery cell clamp (100) for clamping and fixing, and places another battery cell body (10) along the -X direction in another battery cell clamp (100) for clamping and fixing; S2, Cell Pairing: One of the cell clamps (100) moves along the Z direction, and the two cell clamps (100) move simultaneously along the X direction to interchange the positions of the two cell clamps (100). At this time, the pairing of a pair of cell bodies (10) is completed, and then the two cell bodies (10) are taken out. S3, Secondary feeding of battery cells: The feeding mechanism places one battery cell body (10) along the +X direction in one battery cell clamp (100) for clamping and fixing, and places another battery cell body (10) along the -X direction in another battery cell clamp (100) for clamping and fixing; S4. Cell pairing and reset: One of the cell clamps (100) moves along the Z direction, and the two cell clamps (100) move simultaneously along the X direction to exchange the positions of the two cell clamps (100). At this time, the pairing of the second pair of cell bodies (10) is completed and the two cell clamps (100) are reset.

Images