Battery cell stacking and grouping production process and production station

Abstract

The invention relates to a battery cell stacking and grouping production process and a production station, and belongs to the technical field of battery cell stacking and grouping, and the battery cell stacking and grouping production process comprises the following steps: S1, uniformly feeding a plurality of independent battery cells, and synchronously grabbing the plurality of battery cells by a first gripper and a second gripper; s2, the first gripper and the second gripper carry the battery cells to move, and the multiple independent battery cells are pre-stacked in the moving process; s3, a third gripper grabs the front-end module and transfers the front-end module to a transfer table; s4, a fourth gripper synchronously grabs and moves the at least two groups of front-end modules and changes the distance, meanwhile, the battery cells grabbed by the second gripper and the battery cells grabbed by the first gripper are combined, and the battery cells are pre-stacked again to form a middle module; s5, a fourth gripper synchronously grabs the multiple sets of middle modules, and the multiple sets of middle modules are driven to change distances in the moving process; s6, the multiple grippers work synchronously, the transfer table rotates intermittently, and reciprocating circulation is carried out, so that a fourth gripper sequentially grips the multiple middle modules; s7, a third gripper grabs the rear-end module and carries the rear-end module to move into the stacking tray; and S8, stacking the front-end module, the plurality of middle modules and the rear-end module into groups by the tray. The robot gripper assembly has the advantages that the number of idle robot grippers is small, the production takt is greatly increased, the layout is compact, and the occupied space is small.

Description

Technical Field

[0001] This application relates to the field of battery cell stacking technology, and in particular to a battery cell stacking production process and production station. Background Art

[0002] In related technologies, during the production process of power batteries, the cells are first stacked into groups, and then multiple modules are sequentially assembled into a box to form a PACK box. On the production line, several cells arrive one by one in sequence and are picked up by a grabbing robot. Each time, a group is picked up and moved to a tray for stacking. The tray then clamps multiple groups of cells into a group.

[0003] However, the material-grabbing robot only picks up one set of cells at a time and moves them back and forth, resulting in a lot of idle time for other parts of the production line, which slows down the overall production cycle and reduces the overall production efficiency of power batteries. Summary of the Invention

[0004] To address the issue of excessive robot idleness leading to slow production line cycle times, this application provides a cell stacking and grouping production process.

[0005] The battery cell stacking and grouping production process provided in this application adopts the following technical solution: A battery cell stacking and assembly manufacturing process and production station includes the following steps: S1: Several independent battery cells are fed evenly along the feeding platform, and the first and second grippers simultaneously grab multiple battery cells on the feeding platform. S2: The first and second grippers carry the battery cells to move. During the movement, multiple independent battery cells are pre-stacked, that is, the large side of the battery cells are connected in sequence. S3: The battery cell is installed on the installation platform with front-end board and back-end board to form front-end module and back-end module. The third gripper grabs the front-end module on the installation platform and transfers it to the transfer platform. S4: The fourth gripper is equipped with at least two gripping units. When the transfer platform rotates, the fourth gripper will simultaneously grip and move at least two sets of front-end modules and change the distance. After the distance is changed, the modules are placed in the preset position of the stacking tray. At the same time, the battery cells gripped by the second gripper meet with the battery cells gripped by the first gripper and are pre-stacked again to form an intermediate module. S5: The transfer platform rotates, and the fourth gripper simultaneously grabs multiple sets of intermediate modules. During the movement, the multiple sets of intermediate modules are driven to change pitch and are moved to the corresponding positions on the stacking pallet. S6: The first gripper, the second gripper, and the fourth gripper work synchronously, and the transfer platform rotates intermittently and repeats in a cycle so that the fourth gripper can sequentially grab multiple intermediate modules and place the multiple intermediate modules sequentially into the stacking tray; S7: The third gripper grabs the back-end module on the installation platform and moves it into the stacking tray; S8: The tray groups the front-end module, multiple middle modules and back-end modules.

[0006] By adopting the above technical solution, the first gripper, the second gripper, and the fourth gripper can simultaneously grasp multiple independent battery cells. The first and second grippers pre-stack multiple independent battery cells, while the fourth gripper simultaneously grasps multiple sets of front-end modules, middle modules, and back-end modules. During the grasping and moving process, the fourth gripper can change its distance to adapt to the stacking of the stacking pallets. Through this process design, the robot grippers are idle for a relatively short time, which greatly improves the production cycle. At the same time, the site layout is compact, with the robot grippers circling the transfer station, and the site occupies less space.

[0007] Preferably, the first gripper and the second gripper described in S1 each include at least two sets of clamping components, and each set of clamping components can grip at least two battery cells at a time.

[0008] Preferably, S2-1: The first gripper and the second gripper are also provided with a rotating component. After the gripping component grips the battery cell, the rotating component drives the battery cell to rotate, which is used to adjust the positive and negative pole directions of the battery cell. S2-2: The first gripper and the second gripper are equipped with sliding components. The sliding components drive the clamping components to move towards each other. The clamping components drive multiple battery cells to move towards each other synchronously and achieve large-area side bonding.

[0009] A production station for implementing any one of the above-described cell stacking and grouping production processes includes a first gripper and a second gripper as described in S1. Both the first gripper and the second gripper are pre-stacked grippers. Both the first gripper and the second gripper include a connecting frame and a gripping plate. One end of the connecting frame is connected to a robotic arm, and the other end is connected to the gripping plate. The sliding component, the rotating component, and the clamping component are all disposed on the gripping plate.

[0010] Preferably, the sliding assembly includes a sliding drive and a sliding table. The sliding table is located on the side of the gripper plate away from the connecting frame. The sliding drive is located on the gripper plate and at one end of the sliding table. A sliding frame is slidably connected to the sliding table, and the clamping assembly is located on the sliding frame.

[0011] Preferably, the clamping assembly includes a pneumatic gripper and a clamping plate. The pneumatic gripper is located on the side of the sliding frame away from the slide table. The pneumatic gripper is used to drive the clamping plate to move. There are two clamping plates, and the two clamping plates move synchronously relative to each other or away from each other along the width direction of the battery cell.

[0012] Preferably, each of the two clamping plates is provided with a clamping pad on one side opposite to the other. The clamping pad is made of polyurethane material, and an abutment pad is provided inside the top of the clamping plate. The abutment pad is made of polyoxymethylene material.

[0013] Preferably, the rotating assembly includes a rotating cylinder and a rotating frame. The rotating cylinder is mounted on the gripper plate, and the rotating frame is connected to the output end of the rotating cylinder. The rotating frame is also equipped with a clamping assembly.

[0014] Preferably, it also includes the fourth gripper mentioned in S4. The fourth gripper is a stacking gripper. The fourth gripper includes a gripper frame and a gripping unit. The gripping unit includes a self-locking cylinder, a reference clamping plate, and a movable clamping plate. The self-locking cylinder is located on the gripper frame. The reference clamping plate is located on the gripper frame. The movable clamping plate is located at the output end of the self-locking cylinder. The self-locking cylinder drives the movable clamping plate to move closer to or away from the reference clamping plate.

[0015] Preferably, the fourth gripper further includes a pitch-changing unit, which includes a pitch-changing motor and a pitch-changing lead screw. The pitch-changing motor is located at one end of the gripper frame, and the pitch-changing lead screw is rotatably connected to one side of the gripper frame. At least two pitch-changing nuts are threaded onto the pitch-changing lead screw. Each pitch-changing nut is provided with a stacked gripper frame, and each stacked gripper frame is provided with a set of gripping units. The pitch-changing motor is used to drive multiple gripping units to move synchronously with pitch-changing characteristics.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up the first, second, and fourth grippers, multiple grippers can simultaneously perform gripping and stacking operations. Multiple grippers are installed around the transfer platform. According to process requirements, the rotation rhythm of the transfer platform is preset to match the pace of gripping and moving of multiple grippers, reducing gripper idleness and thus improving production cycle time. At the same time, the layout design of the four grippers and the transfer platform makes the site area smaller and the structure more compact. 2. The first gripper and the second gripper are each equipped with at least two sets of clamping components. The first gripper and the second gripper simultaneously grip several independent battery cells. During the movement, the sliding component drives the clamping component to move relative to each other so as to achieve mutual contact between multiple independent battery cells. This enables the gripping of multiple sets of battery cells in a single gripping action, effectively improving the pre-stacking efficiency. 3. The variable pitch unit on the fourth gripper enables the fourth gripper to pick up the pre-stacked battery cell modules from the transfer table. During the movement, the gripper moves while changing pitch, so that at least two sets of pre-stacked battery modules are separated from each other and can correspond one-to-one with the preset positions on the stacking tray. This enables the stacking tray to stack multiple sets of battery cell modules synchronously, further improving the production cycle of the production line and greatly increasing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the production process and overall layout of the production station in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram illustrating the specific structure of the first gripper in the state of grasping the battery cell in this embodiment of the application.

[0019] Figure 3 This is a schematic diagram illustrating the specific structure of the first gripper in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram illustrating the specific structure of the fourth gripper in an embodiment of this application.

[0021] Figure 5 yes Figure 4 A magnified view of part A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Feeding platform; 2. Installation platform; 21. Assembly mechanism; 3. Stacking pallet; 31. Stacking bracket; 4. First gripper; 41. Connecting frame; 411. Grip plate; 421. Sliding drive; 422. Slide table; 423. Sliding frame; 431. Rotary cylinder; 432. Rotating frame; 44. Clamping assembly; 441. Pneumatic gripper; 442. Clamping plate; 443. Clamping pad; 444. Abutment pad; 5. Second gripper; 6. Third gripper 7. Fourth gripper; 71. Gripper frame; 72. Pitch-changing unit; 721. Pitch-changing motor; 722. Pitch-changing lead screw; 723. Pitch-changing nut; 73. Stacking gripper frame; 741. Self-locking cylinder; 742. Reference clamping plate; 743. Moving clamping plate; 75. Mounting plate; 751. First connecting hole; 752. Second connecting hole; 76. Position detector; 8. Transfer station; 81. First station; 82. Second station; 83. Third station; 84. Fourth station. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a cell stacking and assembly production process and production station, referring to... Figure 1A battery cell 9 stacking production station includes a loading platform 1, an installation platform 2, a transfer station 8, a stacking tray 3, and multiple robot grippers. The loading platform 1, installation platform 2, and stacking tray 3 are arranged around the transfer station 8. The stacking tray 3 is provided with at least two stacking brackets 31, which are arranged in parallel. The stacking brackets 31 are used to place and accommodate battery cell 9 modules. The robot grippers include a first gripper 4, a second gripper 5, a third gripper 6, and a fourth gripper 7. The first gripper 4 and the second gripper 5 are located between the loading platform 1 and the transfer station 8, the third gripper 6 is located between the transfer station 8 and the installation platform 2, and the fourth gripper 7 is located between the transfer station 8 and the stacking tray 3. The transfer station 8 is provided with a first station 81, a second station 82, a third station 83, and a fourth station 84. The transfer station 8 can rotate in sync with the robot grippers according to the preset rhythm of the PLC program.

[0025] Reference Figure 1 and 2 The feeding platform 1 is used to continuously and uninterruptedly transport battery cells 9. Several independent battery cells 9 are evenly placed on the feeding platform 1. The feeding platform 1 moves, causing the battery cells 9 to move synchronously. The first gripper 4 and the second gripper 5 are both pre-stacked grippers. The first gripper 4 includes a connecting frame 41 and a gripping plate 411. One end of the connecting frame 41 is connected to the robot's robotic arm, and the gripping plate 411 is fixedly connected to the other end of the connecting frame 41. The gripping plate 411 is provided with a sliding component and a clamping component 44.

[0026] Reference Figure 2 and 3 The sliding assembly includes a sliding drive 421 and a sliding table 422. The sliding table 422 is fixedly connected to the gripper plate 411 on the side away from the connecting frame 41. The sliding drive 421 is fixedly connected to the gripper plate 411 and located at one end of the sliding table 422. A sliding frame 423 is slidably connected on the sliding table 422. Multiple sets of clamping components 44 are all provided on the sliding frame 423.

[0027] Reference Figure 3Each clamping assembly 44 includes a gripper 441 and a clamping plate 442. The gripper 441 is fixedly connected to the side of the sliding frame 423 opposite to the slide table 422 and is used to drive the clamping plate 442 to move. There are two clamping plates 442, which move synchronously relative to or away from each other along the width direction of the battery cell 9. To reduce the possibility of scratching the battery cell 9 during clamping, a clamping pad 443 is provided on the opposite side of the clamping plate 442. The clamping pad 443 is made of polyurethane material, and an abutment pad 444 is provided above the clamping plate 441. The abutment pad 444 is made of polyoxymethylene material. When the gripper 441 is powered on and ventilated, it drives the clamping plates 442 to move towards each other along the width direction of the battery cell 9, thereby clamping and fixing the individual battery cell 9. Simultaneously, multiple battery cells 9 can be gripped, and then the first gripper 4 can carry multiple battery cells 9 to move to facilitate subsequent stacking operations.

[0028] Reference Figure 3 To facilitate the rotation and adjustment of the battery cell 9, and to ensure that the positive and negative terminals of the battery cells 9 that are in contact with each other are connected alternately, a rotating assembly is also provided on the gripping plate 411. The rotating assembly is located at one end of the slide table 422. The rotating assembly includes a rotating cylinder 431 and a rotating frame 432. The rotating cylinder 431 is fixedly connected to the gripping plate 411, and the rotating frame 432 is connected to the output end of the rotating cylinder 431. A clamping assembly 44 is also provided on the side of the rotating frame 432 away from the rotating cylinder 431. After multiple sets of clamping assemblies 44 clamp multiple battery cells 9 simultaneously, the rotating frame 432 drives one end of the clamping assembly 44 to rotate, so that the positive and negative terminals of the rotated battery cell 9 and the unrotated battery cell 9 are in contact with each other in turn.

[0029] During production, the first gripper 4 grasps the battery cell 9, and the pneumatic gripper 441 is energized and operates, driving several sets of clamping plates 442 to move and clamp the battery cell 9 on opposite sides in the width direction. During the orientation adjustment and movement of the first gripper 4, the rotary cylinder 431 drives the rotary frame 432 to rotate one end of the battery cell 9, and then the sliding drive 421 drives the sliding frame 423 to move along the slide table 422, so that the large side of two adjacent battery cells 9 are brought closer and fitted together. After being placed on the transfer table 8, they rotate. The battery cell 9 grasped by the second gripper 5 meets the battery cell 9 in the previous state, completing the pre-stacking action to form two sets of intermediate modules, each set of intermediate modules containing four independent battery cells 9. The first gripper 4 transfers the battery cell 9, after its large surface is bonded, to the first station 81 on the transfer platform 8. Simultaneously, the second gripper 5 also places the gripped battery cell 9 on the second station 82 of the transfer platform 8. As the transfer platform 8 rotates, the battery cell 9 gripped by the second gripper 5 again rendezvous with the battery cell 9 that rotated from the first station 81 on the transfer platform 8. The working principle and action rhythm of the second gripper 5 are the same as those of the first gripper 4, and will not be described in detail here.

[0030] Reference Figure 1After the first gripper 4 and the second gripper 5 place the intermediate module on the transfer platform 8, the transfer platform 8 rotates with the intermediate module and moves to the third station 83 and the fourth station 84. The installation platform 2 is equipped with an assembly mechanism 21, a front-end board, and a rear-end board. The third gripper 6 picks up the intermediate module and places it on the installation platform 2. The assembly mechanism 21 combines the front-end board with the intermediate module to form the front-end module; the rear-end board is combined with the intermediate module to form the rear-end module. The third gripper 6 and the fourth gripper 7 are both stacking grippers. The third gripper 6 is used to pick up and move the front-end module and the rear-end module to the transfer platform 8, and rotates with the transfer platform 8 to the fourth station 84. Then, the fourth gripper 7 picks up the cell 9 module located at the fourth station 84.

[0031] Reference Figure 1 and 4 The fourth gripper 7 includes a gripper frame 71, a pitch-changing unit 72, and a gripping unit. The pitch-changing unit 72 includes a pitch-changing motor 721 and a pitch-changing lead screw 722. The pitch-changing motor 721 is fixedly connected to one end of the gripper frame 71, and the pitch-changing lead screw 722 is rotatably connected to one side of the gripper frame 71. At least two pitch-changing nuts 723 are threaded onto the pitch-changing lead screw 722. The pitch-changing nuts 723 slide relative to the gripper frame 71. In this design, two pitch-changing nuts 723 are provided. Each individual pitch-changing nut 723 is provided with a stacked gripper frame 73, and each stacked gripper frame 73 is provided with multiple sets of gripping units. After the gripping unit simultaneously grips two sets of battery cell 9 modules, it automatically adjusts the spacing between the two sets of battery cell 9 modules under the drive of the variable pitch unit 72 to adapt to the position of multiple stacking brackets 31 on the stacking tray 3, so that the corresponding battery cell 9 modules can be placed on the corresponding stacking brackets 31 at the same time, so that the stacking brackets 31 can stack the front-end module, multiple intermediate modules and the back-end module into a battery cell 9 module.

[0032] Reference Figure 4 and 5 The gripping unit includes a self-locking cylinder 741, a reference clamping plate 742, and a movable clamping plate 743. The self-locking cylinder 741 is fixedly connected to the stacking gripper 73, the reference clamping plate 742 is connected to the stacking gripper 73, and the movable clamping plate 743 is located at the output end of the self-locking cylinder 741. The self-locking cylinder 741 drives the movable clamping plate 743 to move closer to or further away from the reference clamping plate 742.

[0033] Reference Figure 4 Each stacking gripper 73 is equipped with multiple gripping units, and the number of gripping units can be adjusted according to the modules to be gripped. In this embodiment, the middle module has four battery cells 9, the front module has four battery cells 9 plus a front plate, and the rear module has four battery cells 9 plus a rear plate. Therefore, five gripping units are provided, so that the reference clamping plate 742 can be matched with the moving clamping plate 743 one by one to clamp the battery cell 9 modules, thereby ensuring the stability of the battery cell 9 modules during transportation and reducing the possibility of accidental drop.

[0034] Reference Figure 4 and 5 To improve the adaptability of the fourth gripper 7 and facilitate the gripping of various specifications of battery cell 9 modules, the relative connection position between the reference clamp 742 and the stacking gripper 73 is adjustable. The stacking gripper 73 has multiple connection holes, and the reference clamp 742 is connected to the reference clamp 743 by bolts, ensuring safety and reliability. The position of the reference clamp 742 is adjusted according to the specifications of the battery cell 9 modules to be stacked, achieving coarse adjustment of the distance between the reference clamp 742 and the moving clamp 743. Then, during the gripping of the battery cell 9 modules, fine adjustment of the distance is achieved through the self-locking cylinder 741. The third gripper 6 and the fourth gripper 7 have the same structure and working principle, and will not be described further here.

[0035] Reference Figure 5 A mounting plate 75 is fixedly connected to the stacking gripper 73. The mounting plate 75 has a first connecting hole 751 and a second connecting hole 752, the second connecting hole 752 being an arc-shaped oblong hole. Bolts pass through the first connecting hole 751 and the second connecting hole 752 to connect the mounting plate 75 to the positioning detector 76. The second connecting hole 752 allows for flexible adjustment of the relative angle between the positioning detector 76 and the mounting plate 75. The positioning detector 76 is used to detect whether the battery cell 9 is properly clamped, facilitating the next step of activation.

[0036] The implementation principle of a battery cell stacking and grouping production process and production station in this application embodiment is as follows: As the transfer table 8 rotates, the front-end module moves to the fourth station 84. The gripping unit grips the front-end module. During the movement after gripping, the variable pitch motor 721 runs, driving the variable pitch nut 723 to move the stacking gripper 73, adjusting the spacing between the two sets of front-end modules. Then, the two sets of front-end modules are placed one-to-one on the two stacking brackets 31 of the stacking tray 3. At this time, the first gripper 4 and the second gripper 5 simultaneously grip the independent battery cell 9 on the loading platform 1, pre-stack it, and place it at the first station 81 and the second station 82 of the transfer table 8. The transfer table 8 rotates again, and the third gripper 6 grips the intermediate module and moves it to the mounting platform 2, so that it is combined with the rear end plate to form the rear end module. The transfer table 8 continues to rotate, and the fourth gripper grips the intermediate module on the transfer table 8 and transfers it into the stacking bracket 31, repeating this process multiple times. During this process, the third gripper 6 is in a resting state. When the back-end module is needed, the third gripper 6 grabs the back-end module from the installation platform 2 and places it on the transfer station 8. The transfer station 8 carries the back-end module and rotates to the fourth station 84. The fourth gripper 7 grabs the back-end module and transfers it to the stacking bracket 31. Then, the stacking bracket 31 stacks the front-end module, the middle module and the back-end module to form the cell 9 module.

[0037] This application also discloses a manufacturing process for stacking and assembling 9 battery cells, including the following steps: S1: Several independent battery cells 9 are fed evenly along with the feeding platform 1. The first gripper 4 and the second gripper 5 include at least two sets of clamping components 44, which simultaneously grip multiple battery cells 9 on the feeding platform 1 through the clamping components 44. S2-1: After grabbing the battery cell 9, the rotating component drives the battery cell 9 to rotate, which is used to adjust the positive and negative pole orientation of the battery cell 9; S2-2: The sliding component drives the clamping component 44 to move towards each other. The clamping component 44 drives multiple battery cells 9 to move towards each other synchronously and achieve large-area side bonding, completing the pre-stacking action. Then, the battery cells 9 are placed on the first station 81 and the second station 82 of the transfer table 8. S2-3: The second gripper 5 will combine the battery cell 9 that it grabs again with the battery cell 9 that was originally in the first station 81 on the transfer platform 8 to form an intermediate module; S3: The third gripper 6 picks up the battery cell 9 and places it on the installation platform 2. The front-end board is installed on the installation platform 2 to form a front-end module. The third gripper 6 picks up the front-end module on the installation platform 2 and transfers it to the transfer station 8, where it is placed at the third station 83 of the transfer station 8. S4: The fourth gripper 7 will simultaneously grab and move at least two sets of front-end modules and change the distance. After the distance is changed, they will be placed in the preset position of the stacking bracket 31. At the same time, the battery cell 9 grabbed by the second gripper 5 will meet with the battery cell 9 grabbed by the first gripper 4 and be pre-stacked again to form an intermediate module. S5: The transfer platform 8 rotates, and the fourth gripper 7 simultaneously grabs multiple sets of intermediate modules. During the movement, the multiple sets of intermediate modules are driven to change pitch and are moved to the corresponding positions on the stacking tray 31. S6: The first gripper 4, the second gripper 5 and the fourth gripper 7 work synchronously, and the transfer platform 8 rotates intermittently and repeats in a cycle so that the fourth gripper 7 can grab multiple intermediate modules in sequence and place the multiple intermediate modules in the stacking tray 3 in sequence. S7: The third gripper 6 grabs the intermediate module on the transfer platform 8 and transfers it to the installation platform 2. Then, it is assembled by the assembly mechanism 21 to form the back-end module. The third gripper 6 grabs the back-end module on the installation platform 2 and places the back-end module at the third station 83 of the transfer platform 8. S8: The tray groups the front-end module, multiple middle modules and back-end modules.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cell stacking and assembly manufacturing process, characterized in that, The following steps are involved: S1: Several independent battery cells (9) are fed evenly along with the feeding platform (1), and the first gripper (4) and the second gripper (5) simultaneously grab multiple battery cells (9) on the feeding platform (1); S2: The first gripper (4) and the second gripper (5) carry the battery cell (9) to move. During the movement, multiple independent battery cells (9) are pre-stacked, that is, the large side of the battery cell (9) is connected in sequence. S3: The battery cell (9) is installed on the installation platform (2) with a front-end board and a back-end board to form a front-end module and a back-end module. The third gripper (6) grabs the front-end module on the installation platform (2) and transfers it to the transfer station (8). S4: The fourth gripper (7) is equipped with at least two gripping units. The transfer station (8) rotates and the fourth gripper (7) synchronously grips and moves at least two sets of front-end modules and changes the distance. After changing the distance, it is placed in the preset position of the stacking tray (3). At the same time, the battery cell (9) gripped by the second gripper (5) meets the battery cell (9) gripped by the first gripper (4) and is pre-stacked again to form an intermediate module. S5: The transfer station (8) rotates, and the fourth gripper (7) simultaneously grabs multiple sets of intermediate modules. During the movement, the multiple sets of intermediate modules are driven to change pitch and are moved to the corresponding positions on the stacking pallet (3). S6: The first gripper (4), the second gripper (5) and the fourth gripper (7) work synchronously, and the transfer station (8) rotates intermittently and repeats in a cycle so that the fourth gripper (7) can grab multiple intermediate modules in sequence and place the multiple intermediate modules in the stacking tray (3) in sequence. S7: The third gripper (6) grabs the back-end module on the mounting platform (2) and carries it to the stacking tray (3); S8: The tray groups the front-end module, multiple middle modules and back-end modules.

2. The cell stacking and grouping production process according to claim 1, characterized in that... The first gripper (4) and the second gripper (5) described in S1 each include at least two sets of clamping components (44), and each set of clamping components (44) can grip at least two battery cells (9) at a time.

3. The cell stacking and grouping production process according to claim 1, characterized in that, S2 also includes the following steps: S2-1: The first gripper (4) and the second gripper (5) are also provided with a rotating component. After the clamping component (44) grips the battery cell (9), the rotating component drives the battery cell (9) to rotate, which is used to adjust the positive and negative pole directions of the battery cell (9). S2-2: The first gripper (4) and the second gripper (5) are provided with sliding components. The sliding components drive the clamping components (44) to move towards each other. The clamping components (44) drive multiple battery cells (9) to move towards each other synchronously and achieve large-area side bonding.

4. A production station for implementing the cell stacking and grouping production process according to any one of claims 1 to 3, characterized in that, Includes the first gripper (4) and the second gripper (5) described in S1. The first gripper (4) and the second gripper (5) are both pre-stacked grippers. The first gripper (4) and the second gripper (5) both include a connecting frame (41) and a gripping plate (411). One end of the connecting frame (41) is connected to the robotic arm, and the other end is connected to the gripping plate (411). The sliding component, the rotating component, and the clamping component (44) are all disposed on the gripping plate (411).

5. A cell stacking and grouping production station according to claim 4, characterized in that, The sliding assembly includes a sliding drive (421) and a slide table (422). The slide table (422) is located on the side of the gripper plate (411) away from the connecting frame (41). The sliding drive (421) is located on the gripper plate (411) and at one end of the slide table (422). A sliding frame (423) is slidably connected on the slide table (422). The clamping assembly (44) is located on the sliding frame (423).

6. A cell stacking and grouping production station according to claim 5, characterized in that, The clamping assembly (44) includes a pneumatic gripper (441) and a clamping plate (442). The pneumatic gripper (441) is located on the side of the sliding frame (423) away from the slide table (422). The pneumatic gripper (441) is used to drive the clamping plate to move. There are two clamping plates (442). The two clamping plates (442) move synchronously relative to each other or opposite to each other along the width direction of the cell (9).

7. A cell stacking and grouping production station according to claim 6, characterized in that, Each of the two clamping plates (442) has a clamping pad (443) on one side opposite to the other. The clamping pad (443) is made of polyurethane material. The clamping plate (442) has an abutment pad (443) inside its top end. The abutment pad (443) is made of polyoxymethylene material.

8. A cell stacking and grouping production station according to claim 4, characterized in that, The rotating assembly includes a rotating cylinder (431) and a rotating frame (432). The rotating cylinder (431) is mounted on a gripper plate (411), and the rotating frame (432) is connected to the output end of the rotating cylinder (431). The rotating frame (432) is also provided with a clamping assembly (44).

9. A cell (9) stacking and grouping production station according to claim 4, characterized in that, It also includes the fourth gripper (7) described in S4. The fourth gripper (7) is a stacking gripper. The fourth gripper (7) includes a gripper frame (71) and a gripping unit. The gripping unit includes a self-locking cylinder (741), a reference clamping plate (742), and a moving clamping plate (743). The self-locking cylinder (741) is located on the gripper frame (71). The reference clamping plate (742) is located on the gripper frame (71). The moving clamping plate (743) is located at the output end of the self-locking cylinder (741). The self-locking cylinder (741) drives the moving clamping plate (743) to move closer to or further away from the reference clamping plate (742).

10. A cell (9) stacking and grouping production station according to claim 9, characterized in that, The fourth gripper (7) also includes a pitch-changing unit (72), which includes a pitch-changing motor (721) and a pitch-changing lead screw (722). The pitch-changing motor (721) is located at one end of the gripper frame (71), and the pitch-changing lead screw (722) is rotatably connected to one side of the gripper frame (71). At least two pitch-changing nuts (723) are threaded onto the pitch-changing lead screw (722). Each pitch-changing nut (723) is provided with a stacked gripper frame (73), and each stacked gripper frame (73) is provided with a set of gripping units. The pitch-changing motor (721) is used to drive multiple gripping units to move synchronously with pitch-changing characteristics.

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