Battery core lamination transferring method

Abstract

The invention discloses a battery core lamination transferring method. The method comprises the following steps: step 1, placing a first battery core bearing platform on a first placing station of a lamination seat; 2, driving the lamination seat to move from the new station to a lamination station of a lamination device; step 3, carrying out battery cell lamination on the first battery cell bearing platform by utilizing a lamination assembly; 4, after the battery cells are laminated, driving the lamination seat to move from the lamination station to a transfer station of the lamination device; 5, covering the battery cell with a second battery cell bearing platform, and moving away the first battery cell bearing platform, the second battery cell bearing platform and the battery cell between the first battery cell bearing platform and the second battery cell bearing platform from the first placement station as a whole; 6, driving the lamination seat to move from the transfer station to a new replacement station, and transferring the first battery cell bearing platform which is placed in the second placement station in advance to the first placement station; and circularly executing the step 2.

Description

Technical Field

[0001] This invention belongs to the field of battery manufacturing technology, specifically a method for transferring battery cell stacking. Background Technology

[0002] With the development of battery manufacturing technology, the stacking process has also advanced rapidly. In existing stacking equipment, the stacking table is fixedly mounted on the stacking seat. After the cells are stacked, a clamping mechanism is needed to transfer the stacked cells out of the stacking table for the production of the next cell. Since the freshly stacked cells have not yet undergone the hot-pressing process, the electrode layers and separators of the cells are in a relatively loose state. Using clamping tools to transfer the cells can easily lead to misalignment between the electrode layers, thereby reducing the stacking accuracy.

[0003] Similarly, during the cell stacking process, the electrode layers and separators already stacked on the stacking table are in a relatively loose state. Without restraint, misalignment between the electrode layers would occur, reducing the cell stacking precision. Therefore, in existing technologies, a pressing mechanism is generally used to press and fix the stacked electrode layers and separators. The pressing mechanism includes a pressing blade and a pressing blade drive mechanism that drives the blade's movement. During the stacking process, the pressing blade involves actions such as infeeding, pressing down, retracting, and lifting. Existing technologies typically use a combination of multiple servo motors or cylinders to drive this mechanism. While the combination of multiple power components can meet the requirements to some extent, it undoubtedly increases the complexity of the structure and the difficulty of control, resulting in a larger size and higher cost for the pressing mechanism. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a cell stacking and transfer method that enables the replacement and transfer of the first cell carrier platform. By making the first cell carrier platform and the cell transfer synchronously, misalignment between the electrode layers of the cell can be prevented during the transfer process, thereby improving the cell stacking accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for transferring battery cell laminations includes the following steps:

[0007] Step 1: Place the first cell carrier platform at the first placement station of the stacking unit;

[0008] Step 2: Move the stacking stand from the replacement station to the stacking station of the stacking device;

[0009] Step 3: Stack the cells using the stacking assembly on the first cell carrier platform;

[0010] Step 4: After the cell stacking is completed, the stacking stand is moved from the stacking station to the transfer station of the stacking device;

[0011] Step 5: Cover the battery cell with the second battery cell support platform, and remove the first battery cell support platform, the second battery cell support platform, and the battery cell located between the first battery cell support platform and the second battery cell support platform as a whole from the first placement station;

[0012] Step 6: Drive the stacking station from the transfer station to the replacement station, and transfer the first cell carrier platform, which was previously placed in the second placement station, to the first placement station; repeat step 2.

[0013] Furthermore, in step four, during the process of driving the stacking station to move from the stacking station to the transfer station, the battery cell is kept in a pressed state by the pressure knife.

[0014] Furthermore, in step five, the method for moving the battery cell from the first placement site is as follows:

[0015] 51) Pre-clamp the second battery cell carrier platform on the battery cell transfer fixture, so that the battery cell carrier surface of the second battery cell carrier platform faces downward, and push the transmission belt covering the battery cell carrier surface of the second battery cell carrier platform downward; drive the battery cell transfer fixture to move so that the battery cell carrier surface of the second battery cell carrier platform is aligned with the battery cell carrier surface of the first battery cell carrier platform;

[0016] 52) Drive the cell transfer fixture downwards so that the transmission belt on the second cell support platform covers the cell, and then remove the pressure knife from the cell.

[0017] 53) Drive the cell transfer fixture to continue moving downward until the cell-bearing surface of the second cell-bearing platform presses on the cell. Then, use the cell transfer fixture to clamp the first cell-bearing platform so that the cell is fixed between the cell-bearing surfaces of the first and second cell-bearing platforms.

[0018] 54) Drive the cell transfer fixture to move, and remove the first cell carrier platform, the second cell carrier platform, and the cell located between the first cell carrier platform and the second cell carrier platform as a whole from the first placement station.

[0019] 20. The cell stacking transfer method according to claim 3, characterized in that: in step 51), after the transmission belt covering the cell bearing surface of the second cell bearing platform is pushed downward, the transmission belt forms a cell covering section for covering the cell.

[0020] Furthermore, in step 53), as the battery cell transfer fixture continues to move downwards, the winding roller of the second battery cell carrying platform is driven to rotate to wind up the transmission belt; or,

[0021] The drive cell transfer fixture continues to move downwards until the cell-bearing surface of the second cell-bearing platform presses onto the cell. At this point, the cell-covering section covers the cell-bearing surface of the second cell-bearing platform, and the drive roller of the second cell-bearing platform rotates to wind up the drive belts on both sides of the cell-covering section.

[0022] Furthermore, the first and second battery cell carrier platforms adopt the same structure. The battery cell carrier platform includes a carrier platform body and a battery cell transfer assembly. The carrier platform body is provided with a battery cell carrier surface for carrying the battery cell, and a platform support frame is provided on the surface of the carrier platform body opposite to the battery cell carrier surface. The battery cell transfer assembly includes winding rollers located on the front and rear sides of the carrier platform body, respectively, and a transmission belt covering the battery cell carrier surface is provided between the two winding rollers.

[0023] Furthermore, a cell transfer device is provided at the transfer station. The cell transfer device includes the cell transfer fixture and a fixture moving device for driving the cell transfer fixture to move. The cell transfer fixture includes a transfer bracket, and the transfer bracket is provided with:

[0024] The first clamping assembly is used to clamp the first battery cell carrier platform carrying the battery cell;

[0025] The second clamping assembly is used to clamp the second battery cell carrier platform;

[0026] A tape drive assembly is used to drive the tape rollers of the second cell support platform to rotate;

[0027] The expansion assembly is used to control the distance between the drive belt of the second cell support platform and the cell support surface.

[0028] Furthermore, the second clamping assembly includes two second clamping hook units arranged opposite to each other. Each second clamping hook unit includes a second clamping hook seat that slides with the transfer bracket with a single degree of freedom. The second clamping hook seat is provided with a second clamping hook for hooking the second cell carrying platform. The transfer bracket is provided with a second clamping hook driving mechanism for driving the second clamping hook seat to move.

[0029] Furthermore, the first clamping assembly includes two first clamping hook units arranged opposite to each other. Each first clamping hook unit includes a first clamping hook seat that slides with the transfer bracket with a single degree of freedom. The first clamping hook seat is provided with a first clamping hook for hooking the first cell carrying platform. The transfer bracket is provided with a first clamping hook driving mechanism for driving the first clamping hook seat to move.

[0030] Furthermore, the winding drive assembly includes a docking bracket, which is provided with docking shafts that are respectively docked with two winding rollers of the second cell carrying platform, and the docking bracket is provided with a first power device for driving the docking shafts to rotate, thereby driving the corresponding winding rollers to rotate.

[0031] Furthermore, the docking bracket has docking arms at both ends that are rotatably coupled with it, and the docking shaft and the first power device are both mounted on the docking arms; the docking bracket is provided with a second power device for driving the docking arms to rotate.

[0032] Furthermore, the transfer bracket is equipped with a docking track, the docking bracket is slidably mounted on the docking track, and the transfer bracket is provided with a docking drive mechanism for driving the docking bracket to move along the docking track.

[0033] Furthermore, the spreading assembly includes a spreading bracket, on which are spreading plates located on both sides of the transfer bracket to spread the transmission belt of the second cell carrying platform; the transfer bracket is provided with a linear bearing, and the spreading bracket is provided with a guide post that cooperates with the linear bearing.

[0034] Furthermore, the stacking device includes:

[0035] A stacking table assembly includes a stacking base and a cell carrying platform. The stacking base is provided with a first placement station, and the cell carrying platform is placed at the first placement station. A pressing device is provided on the stacking base corresponding to the cell carrying platform.

[0036] A cell stacking assembly is used for stacking cells on a cell carrier platform.

[0037] The stacking table replacement mechanism is used to remove the cell carrier platform and the stacked cells and replace them with a new cell carrier platform at the first placement station.

[0038] The stacking table replacement mechanism includes a support base, on which a transfer track is provided. The stacking table slides in conjunction with the transfer track. Along the direction of the transfer track, the support base is provided with a stacking station for stacking cells, a transfer station for removing the cell carrier platform and the stacked cells, and a replacement station for placing a new cell carrier platform on the first placement station.

[0039] The support base is provided with a transfer drive mechanism for driving the stacking base to move along the transfer track.

[0040] Furthermore, the pressing device includes two pressing assemblies, which are located at both ends of the stacking seat; each pressing assembly includes two double pressing linkage mechanisms, which each double pressing linkage mechanism includes two pressing mechanisms, which are symmetrically arranged on both sides of the same end of the stacking seat.

[0041] The pressing mechanism includes a pressing mechanism, a pressing mechanism for moving the pressing mechanism, and a pressing mechanism for driving the pressing mechanism.

[0042] The pressing knife moving mechanism includes a support plate, an inner side plate, an outer side plate, and a moving shaft. The inner side plate is located between the support plate and the outer side plate. The support plate is provided with a first track, and the inner side plate is slidably engaged with the first track. The inner side plate is provided with a second track, and the outer side plate is slidably engaged with the second track. The first track and the second track are perpendicular to each other, and the pressing knife is mounted on the outer side plate.

[0043] The support plate is provided with a pressing track for constraining the movement trajectory of the pressing tool; the pressing track includes a straight section for advancing and a straight section for retracting that are parallel to each other, the straight section for advancing is located above the straight section for retracting, and a downward pressing section and an upward lifting section are respectively provided between the two ends of the straight section for advancing and the straight section for retracting.

[0044] The inner end of the moving shaft is slidably engaged with the pressure knife track; the inner side plate is provided with a hollow hole for the moving shaft to pass through, and the outer side plate is rotatably engaged with the moving shaft;

[0045] A double-hinged connecting rod is provided between the outer side plate and the inner side plate, and the double-hinged connecting rod is hinged to the outer side plate and the inner side plate respectively; the first track is parallel to the infeed straight section, and the pressure drive mechanism is used to drive the inner side plate to move along the first track;

[0046] The inner plates of the two pressing mechanisms belonging to the same dual pressing linkage mechanism move synchronously in opposite directions along the corresponding first track to drive the pressing blades of the two pressing mechanisms to perform synchronous infeed or retraction movements; the inner plates of the two pressing mechanisms located on the same side of the same end of the stacking seat move synchronously in opposite directions along the corresponding first track to drive the pressing blades of the two pressing mechanisms to perform infeed and retraction movements respectively.

[0047] Furthermore, the pressing knife moving mechanism also includes a fixed shaft, which is mounted on the support plate. The fixed shaft is provided with a guide plate that rotates with it, and the guide plate is provided with a constraint track for assisting the rotation of the moving shaft. The outer end of the moving shaft slides with the constraint track.

[0048] Furthermore, the constraint track includes a first constraint segment and a second constraint segment, with a reversing transition segment between the first constraint segment and the second constraint segment. When the inner end of the moving shaft is located between the retraction straight segment and the downward tilting segment, and when the inner end of the moving shaft is located between the feed straight segment and the upward tilting segment, the outer end of the moving shaft is located within the reversing transition segment.

[0049] Furthermore, the pressing knife assembly also includes a pressing knife mounting bracket, and the support plate is fixedly mounted on the pressing knife mounting bracket; the pressing knife mounting bracket is slidably engaged with vertical rails disposed at both ends of the stacking seat, and an electromagnet assembly for driving the pressing knife mounting bracket to move along the vertical rails is provided between the pressing knife mounting seat and the stacking seat.

[0050] Furthermore, the replacement station is equipped with a lifting support and a lifting mechanism for driving the lifting support to move in a vertical direction perpendicular to the transfer track. The lifting support is equipped with a second placement station for placing the stacking table. The lifting support is equipped with a lifting support plate, the second placement station is located on the lifting support plate, and the stacking table is equipped with a clearance groove corresponding to the lifting support plate.

[0051] The beneficial effects of this invention are as follows:

[0052] The cell stacking and transfer method of the present invention first places a first cell carrier platform on a first placement station of a stacking base, then drives the stacking base to move to the stacking station for cell stacking. After the cell stacking is completed, the stacking base is driven to a transfer station, where a second cell carrier platform is stamped on the cell. The first cell carrier platform, the second cell carrier platform, and the cell are then removed from the first placement station as a whole. Both the first and second cell carrier platforms are in surface contact with the cell, preventing the cell from becoming loose or misaligned. After the cell is removed, the stacking base is moved to a replacement station, and the first cell carrier platform placed on the second placement station is transferred to the first placement station. This achieves the replacement and transfer of the first cell carrier platform, realizing the technical objective of continuous stacking and cell transfer after stacking. Attached Figure Description

[0053] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0054] Figure 1 Axonometric view of the lamination assembly and the cell transfer assembly;

[0055] Figure 2 This is an isometric view of the lamination assembly;

[0056] Figure 3 This is a cross-sectional view of the battery cell support platform;

[0057] Figure 4 An isometric view of the battery cell support platform;

[0058] Figure 5 for Figure 4 Enlarged view of region A;

[0059] Figure 6 This is a schematic diagram of the hot press plate structure;

[0060] Figure 7 This is a schematic diagram of the stacking stage assembly;

[0061] Figure 8 for Figure 7 Enlarged view of region B;

[0062] Figure 9 This is a schematic diagram of the track slab structure;

[0063] Figure 10 The first isometric view of the laminated assembly;

[0064] Figure 11 This is a second isometric view of the laminated assembly;

[0065] Figure 12 This is a schematic diagram of the material cutting mechanism;

[0066] Figure 13 This is a structural diagram of the new workstation;

[0067] Figure 14 This is a schematic diagram of the battery cell transfer device;

[0068] Figure 15 The upper isometric view of the cell transfer fixture;

[0069] Figure 16 This is the lower isometric view of the battery cell transfer fixture;

[0070] Figure 17 This is a diagram showing the state of the battery cell after it has been clamped by the battery cell transfer fixture.

[0071] 1-Battery cell;

[0072] 10-Cell support platform; 11-Insulation plate; 12-Hot pressing plate; 13-Electric heating rod; 14-Groove; 15-Conductive brush holder; 16-Conductive brush; 17-Wrapping roller; 18-Transmission belt; 19-Connecting rod; 20-Connecting block; 21-Connecting shaft; 22-Internal hexagonal joint groove; 23-Wear-resistant strip; 24-Negative pressure hole; 25-Through hole;

[0073] 30-Stacking table assembly; 31-Stacking seat; 32-First placement station; 33-Pressure tool; 34-Support plate; 35-Inner side plate; 36-Outer side plate; 37-Moving shaft; 38-First track; 39-Second track; 40-Pressure tool track; 41-Track plate; 42-Straight infeed section; 43-Straight retraction section; 44-Downward tilting section; 45-Upward tilting section; 46-Fixed axis; 47-Guide plate; 48-Constraint track; 49-First constraint section; 50-Second constraint section; 51-Reversing transition section; 52-Double screw; 53-Drive nut; 54-Pressure tool power motor; 55-Driving pulley; 56-Driven pulley; 57-Pressure tool mounting bracket; 58-Vertical track;

[0074] 60-Stacking assembly; 61-Fixed guide plate; 62-Rotating swing arm; 63-Fixed guide rail; 64-Straight guide section; 65-Inclined section; 66-Swinging guide rail; 67-Stacking moving component; 68-Horizontal rail; 69-Transverse moving plate; 70-Vertical rail; 71-Stacking mounting frame; 72-Mounting plate; 73-Upper roller assembly; 74-Lower roller assembly; 75-Tension roller mechanism; 76-Suction cup; 77-Suction cup rotating arm; 78-First support; 79-Second support; 80-First cutting rail; 81-Second cutting rail; 82-Third support; 83-Vertical rail; 84-Film cutting bracket; 85-Film cutting assembly; 86-Fixed shaft; 87-Stacking drive motor; 88-Material picking plate;

[0075] 90-Stacking table replacement mechanism; 91-Support base; 92-Transfer track; 93-Lifting support; 94-Lifting mechanism; 95-Second placement station; 96-Lifting support plate;

[0076] 100-Cell transfer fixture; 101-Transfer bracket; 102-First cell support platform; 103-Second cell support platform; 104-First clamping hook seat; 105-First clamping hook; 106-First clamping hook drive mechanism; 107-Second clamping hook seat; 108-Second clamping hook; 109-Second clamping hook drive mechanism; 110-Clamping rail; 111-Connecting seat; 112-Dating bracket; 113-Dating shaft; 114-First power unit; 115-Dating arm; 116-Second power unit; 117-Dating rail; 118-Dating drive mechanism; 119-Spreading bracket; 120-Spreading plate; 121-Linear bearing; 122-Guide column; 123-Clamping fixture moving device. Detailed Implementation

[0077] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0078] like Figure 1-2As shown, the stacking device in this embodiment includes a stacking table assembly 30, a stacking assembly 60, and a stacking table changing mechanism 90. In this embodiment, the stacking table assembly 30 includes a stacking base 31 and a cell carrying platform 10. The stacking base 31 is provided with a first placement station 32, and the cell carrying platform 10 is placed on the first placement station 32. A pressing device is provided on the stacking base 31 corresponding to the cell carrying platform 10.

[0079] like Figure 3-6 As shown, in this embodiment, the battery cell support platform 10 includes a support platform body, which includes a heat insulation plate 11 and a hot-pressing plate 12. The hot-pressing plate 12 covers the heat insulation plate 11, and the surface of the hot-pressing plate 12 facing away from the heat insulation plate 11 is the battery cell support surface for supporting the battery cell 1. An electric heating device is provided between the heat insulation plate 11 and the hot-pressing plate 12. In this embodiment, the electric heating device is an electric heating rod 13. The electric heating rod 13 can be arranged in various ways, such as serpentine arrangement between the heat insulation plate 11 and the hot-pressing plate 12; or it can be arranged in a straight line and spaced apart between the heat insulation plate 11 and the hot-pressing plate 12. In this embodiment, the electric heating rod 13 is serpentine arrangement between the heat insulation plate 11 and the hot-pressing plate 12. In a preferred embodiment, the bottom surface of the hot-pressing plate 12 facing the heat insulation plate 11 is provided with a groove 14 for embedding the heating rod 13, and the electric heating rod 13 is installed in the groove 14. Specifically, since the electric heating rod 13 has a serpentine structure, the groove 14 in this embodiment also has the same serpentine structure to install the electric heating rod 13. Of course, if the electric heating rod 13 is straight or has other shapes, the shape of the groove 14 is set to be the same as that of 13. By installing the electric heating rod 13 in the groove 14 of the hot press plate 12, the heat transfer efficiency between the electric heating rod 13 and the hot press plate 12 can be improved. Specifically, in order to supply power to the electric heating device, the support platform body in this embodiment is provided with a conductive brush assembly for connecting the electric heating device to power. The conductive brush assembly in this embodiment includes a conductive brush holder 15, and a conductive brush 16 is installed on the conductive brush holder 15. Specifically, the conductive brush holder 15 is installed on the hot press plate 12, and the conductive brush 16 is electrically connected to the electric heating rod 13. In this embodiment, there are two electric heating rods 13, and the two ends of the electric heating rod 13 are respectively located at the two ends of the support platform body. At the same end of the bearing platform body, the ends of the two electric heating rods 13 are located on both sides of the bearing platform body, that is, conductive brush assemblies electrically connected to the two electric heating rods 13 are respectively provided on both sides of the same end of the bearing platform body.

[0080] The battery cell carrying platform 10 in this embodiment also includes a battery cell transfer assembly for transferring the battery cell 1. The battery cell transfer assembly includes winding rollers 17 located on both sides of the carrying platform body. A transmission belt 18 covering the battery cell carrying surface is provided between the two winding rollers 17. Driving the winding rollers 17 to rotate drives the transmission belt 18 to move along the battery cell carrying surface, thereby transferring the battery cell 1 outside the battery cell carrying platform 10. In this embodiment, connecting rods 19 are provided at both ends of the winding rollers 17. Connecting blocks 20 are provided at both ends of the carrying platform body corresponding to the connecting rods 19. Connecting shafts 21 parallel to the winding rollers are provided on the connecting blocks 20. The two ends of the connecting rods 20 are rotatably engaged with the winding rollers 17 and the connecting shafts 21, respectively, meaning the connecting rods 20 support the winding rollers 17. The end faces of the winding rollers 17 are provided with mating joints or connecting grooves for connecting with other rotating shafts. In this embodiment, the two end faces of the winding roller 17 are provided with mating grooves for connecting with other rotating shafts. The mating grooves are internal hexagonal mating grooves 22. When other rotating shafts are connected to the winding roller 17 through external hexagonal connectors that mate with the internal hexagonal mating grooves 22, the winding roller 17 can be driven to rotate. Of course, in some other embodiments, a power mechanism that is connected to the winding roller 17 for driving the winding roller 17 to rotate can also be provided on the support platform body, which will not be described in detail here. In the preferred embodiment of this embodiment, wear-resistant strips 23 that mate with the transmission belt 18 are provided on both sides of the support platform body to prevent the hot press plate 12 from being worn. In the preferred embodiment of this embodiment, negative pressure holes 24 are arrayed on the hot press plate 12, and correspondingly, through holes 25 are provided on the transmission belt 18 corresponding to the negative pressure holes 24. The negative pressure effect of the negative pressure holes 24 and through holes 25 can adsorb the battery cell onto the battery cell support surface.

[0081] like Figure 7-9As shown, the pressing device of this embodiment includes two pressing assemblies, which are located at both ends of the stacking base 31. The pressing assembly of this embodiment includes two double-pressing-blade linkage mechanisms, each comprising a pressing mechanism symmetrically arranged on both sides of the same end of the stacking base. Specifically, in this embodiment, the pressing mechanism includes a pressing blade 33, a pressing blade moving mechanism, and a pressing blade driving mechanism. The pressing blade moving mechanism of this embodiment includes a support plate 34, an inner side plate 35, an outer side plate 36, and a moving shaft 37. The inner side plate 35 is located between the support plate 34 and the outer side plate 36. A first track 38 is provided on the support plate 34, and the inner side plate 35 slides with the first track 38. A second track 39 is provided on the inner side plate 35, and the outer side plate 36 slides with the second track 39. The first track 38 and the second track 39 are perpendicular to each other, and the pressing blade 33 is mounted on the outer side plate 36. Thus, through the interaction of the first track 38 and the second track 39, the outer side plate 36 can move planarly relative to the support plate 34. In this embodiment, the support plate 34 is provided with a pressure track 40 for constraining the movement trajectory of the pressure tool 33. Specifically, a track plate 41 is installed on the support plate 34, and the pressure track 40 is disposed on the track plate 41. The pressure track 40 in this embodiment includes a straight feed section 42 and a straight retraction section 43 that are parallel to each other. The straight feed section 42 is located above the straight retraction section 43. A downward pressing inclined section 44 and an upward lifting inclined section 45 are respectively provided between the two ends of the straight feed section 42 and the straight retraction section 43. The lower end of the downward pressing inclined section 44 is located on the side of its upper end facing the feed direction, and the lower end of the upward lifting inclined section 45 is located on the side of its upper end facing the feed direction.

[0082] In this embodiment, the inner end of the moving shaft 37 is slidably engaged with the pressure tool track 40. The inner side plate 35 has a perforated hole for the moving shaft 37 to pass through, preventing interference between the moving shaft 37 and the inner side plate 35 when the moving shaft 37 moves relative to the inner side plate 35. In this embodiment, the outer side plate 36 is rotatably engaged with the moving shaft 37. Thus, the trajectory of the outer side plate 36 relative to the support plate 34 in planar movement is constrained by the moving shaft 37 and is the same as the trajectory of the pressure tool track 40. In this embodiment, a double-hinged connecting rod 45 is provided between the outer side plate 36 and the inner side plate 35, and the double-hinged connecting rod 45 is hinged to both the outer side plate 36 and the inner side plate 35. In this embodiment, the first track 38 is parallel to the infeed straight section 42, and the pressure tool drive mechanism is used to drive the inner side plate 35 to move along the first track 38. Thus, as the inner plate 35 moves along the first track 38, under the action of the double-hinged connecting rod 45, the outer plate 36 moves relative to the inner plate 35 along the second track 39, causing the outer plate 36 to perform planar motion relative to the support plate 34. This planar motion of the outer plate 36 relative to the support plate 34 is constrained by the pressure tool track 40 under the action of the moving shaft 37. The moving shaft 37 rotates along the pressure tool track 40. When the moving shaft 37 is in the infeed straight section 42, the pressure tool 33 mounted on the outer plate 36 moves towards the stacking seat 31 (i.e., infeed motion); when the moving shaft 37 is in the downward pressing inclined section 44, the pressure tool 33 moves downward towards the stacking seat 31 (i.e., downward pressing motion); when the moving shaft 37 is in the retraction straight section 43, the pressure tool 33 moves away from the stacking seat 31 (i.e., retraction motion); when the moving shaft 37 is in the upward lifting inclined section 45, the pressure tool 33 moves upward (i.e., lifting motion). In this way, only one power source is needed to drive the inner side plate to move along the second track 39, which can drive the pressure knife 33 to perform actions such as tool feeding, pressing down, retracting and lifting, which can effectively simplify the structure and improve the reliability of the equipment.

[0083] Specifically, to achieve alternating motion between the pressing blades of the two dual-pressing-blade linkage mechanisms, in this embodiment, the inner plates 35 of the two pressing blade mechanisms belonging to the same dual-pressing-blade linkage mechanism move synchronously in opposite directions along the corresponding first track 38. Since the two pressing blade mechanisms belonging to the same dual-pressing-blade linkage mechanism are symmetrically arranged on both sides of the same end of the stacking base 31, the pressing blades 33 of the two pressing blade mechanisms can be driven to synchronously perform infeed or retraction movements. The inner plates 35 of the two pressing blade mechanisms located on the same side of the same end of the stacking base 31 move synchronously in opposite directions along the corresponding first track 38 to drive the pressing blades of the two pressing blade mechanisms to perform infeed and retraction movements respectively.

[0084] In a preferred embodiment of this example, the pressing and moving mechanism further includes a fixed shaft 46, which is mounted on a support plate 34. A guide plate 47 is provided on the fixed shaft 46 for rotational engagement with it. A constraint track 48 is provided on the guide plate 47 to assist the rotating shaft 37 in turning. The outer end of the rotating shaft 37 is slidably engaged with the constraint track 48. The constraint track 48 in this embodiment includes a first constraint section 49 and a second constraint section 50. A reversing transition section 51 is provided between the first constraint section 49 and the second constraint section 50. When the inner end of the rotating shaft 37 is located between the retraction straight section 43 and the downward tilting section 44, and when the inner end of the rotating shaft 37 is located between the infeed straight section 43 and the upward tilting section 45, the outer end of the rotating shaft 37 is located within the reversing transition section 51 to guide the rotating shaft 37 in turning and prevent the rotating shaft 37 from moving in the opposite direction along the pressing track 40.

[0085] In this embodiment, the pressing knife driving mechanism includes a threaded screw parallel to the first track 38 and a driving nut 53 cooperating with the threaded screw. The driving nut 53 is fixedly connected to the inner side plate 35. Driving the threaded screw to rotate causes the driving nut 53 to move along the threaded screw, thereby driving the inner side plate 35 to move along the first track 38. Specifically, the threaded screws of the two pressing knife mechanisms belonging to the same double pressing knife linkage mechanism can be set independently. When the thread direction of the threaded screws of the two pressing knife mechanisms belonging to the same double pressing knife linkage mechanism is the same, the rotation direction of the threaded screws of the two pressing knife mechanisms is opposite; when the thread direction of the threaded screws of the two pressing knife mechanisms belonging to the same double pressing knife linkage mechanism is opposite, the rotation direction of the threaded screws of the two pressing knife mechanisms is the same. In this embodiment, the threaded screws of the two pressing knife mechanisms belonging to the same double pressing knife linkage mechanism are integrated and form a double screw 52. The double screw 52 has two threaded segments with opposite thread directions. The driving nuts 53 of the two pressing knife mechanisms respectively cooperate with the two threaded segments.

[0086] The pressing drive mechanism in this embodiment also includes a pressing power mechanism, which includes a pressing power motor 54. The pressing power motor 54 drives two double screws 52, which belong to two double pressing linkage mechanisms, to rotate synchronously. Specifically, in order to realize that the pressing mechanisms, which belong to the two double pressing linkage mechanisms, alternately perform the infeed and retraction movements, when the helical direction of the threaded segments corresponding to the two pressing mechanisms located on the same side of the same end of the stacking base 31 is opposite, the pressing power motor 54 drives the two double screws 52 to rotate in the same direction; when the helical direction of the threaded segments corresponding to the two pressing mechanisms located on the same side of the same end of the stacking base 31 is the same, the pressing power motor 54 drives the two double screws 52 to rotate in opposite directions. In this embodiment, the pressing power motor 54 is arranged in a one-to-one correspondence with the pressing assembly, that is, pressing power motors 54 are respectively provided at both ends of the stacking base 31, and a drive pulley 55 is installed on the output shaft of the pressing power motor 54, and a driven pulley 56 is correspondingly provided on the two double screws 52.

[0087] The pressing knife assembly in this embodiment also includes a pressing knife mounting bracket 57, and a support plate 31 is fixedly mounted on the pressing knife mounting bracket 57. The pressing knife mounting bracket 57 in this embodiment is slidably engaged with vertical rails 58 disposed at both ends of the stacking base 31, and an electromagnet assembly (not shown in the figure) for driving the pressing knife mounting bracket 57 to move along the vertical rails 57 is provided between the pressing knife mounting bracket 57 and the stacking base 31.

[0088] like Figure 10-11As shown, the stacking assembly of this embodiment is used for stacking battery cells on the battery cell carrying platform 10. The stacking assembly 60 of this embodiment includes a fixed guide plate 61 and a rotating swing arm 62. The fixed guide plate 61 of this embodiment is provided with a fixed guide rail 63, which includes a straight guide section 64, with downwardly inclined sections 65 at both ends. The rotating swing arm 62 is provided with a swing guide rail 66, and a stacking moving member 67 is provided between the swing guide rail 66 and the fixed guide rail 62. The stacking moving member 67 is slidably engaged with both the swing guide rail 66 and the fixed guide rail 62. That is, when the rotating swing arm 62 swings around a fixed axis, it can drive the stacking moving member 67 to move along the fixed guide rail 62. The fixed guide plate 61 of this embodiment is provided with a horizontal rail 68 parallel to the straight guide section 64, and a transverse moving plate 69 is slidably engaged with the horizontal rail 68. A vertical track 70 perpendicular to the horizontal track 68 is provided on the horizontal moving plate 69. A stacking mounting frame 71 that slides on the vertical track 70 is provided therewith. The stacking mounting frame 71 moves synchronously with the stacking moving member 67. That is, under the action of the horizontal track 68 and the vertical track 70, the stacking mounting frame 71 can perform planar movement relative to the fixed guide plate 61, but this planar movement is constrained by the stacking moving member 67 and the fixed guide track 63. In this embodiment, the stacking mounting frame 71 is equipped with a strip conveying mechanism and two sheet picking mechanisms located on both sides of the strip conveying mechanism. In this embodiment, the strip conveying mechanism includes a mounting plate 72 fixedly connected to the stacking mounting frame 71. An upper roller group 73 and a lower roller group 74 for guiding the strip are mounted on the mounting plate 72. The upper roller group 73 is located above the lower roller group 74. A tension roller mechanism 75 for controlling the tension of the strip is provided between the upper roller group 73 and the lower roller group 74. The lower roller assembly 74 is equipped with a suction cup assembly on its roller frame for holding the end of the strip material after it has been cut. In this embodiment, the suction cup assembly includes a suction cup 76, and suction cup rotating arms 77 are respectively provided between the two ends of the suction cup 76 and the roller frame of the lower roller assembly 74. The two ends of the suction cup rotating arms 77 are hinged to the suction cup 76 and the roller frame of the lower roller assembly 74, respectively. Thus, the working state of the suction cup assembly can be switched by rotating the suction cup rotating arms 77. The stacking assembly in this embodiment also includes a strip cutting mechanism for cutting the strip material. Figure 12As shown, the strip cutting mechanism includes a first support 78 and a second support 79. The first support 78 has a first cutting track 80 parallel to the horizontal track 68, and the second support 79 is slidably engaged with the first cutting track 80. The second support 79 has a second cutting track 81 perpendicular to the horizontal track 68 and located in the horizontal direction. The second cutting track 81 has a third support 82 slidably engaged with it, the third support 82 has a vertical track 83, the vertical track 83 has a film-cutting bracket 84 slidably engaged with it, and the film-cutting bracket 84 has a film-cutting assembly 85. In this embodiment, the film-cutting assembly 85 uses an electric heating wire. The stacking assembly in this embodiment also includes a stacking drive mechanism for driving the rotating swing arm 62 to rotate around a fixed shaft 86 located below the fixed guide track 63. In this embodiment, the rotating swing arm 62 rotates synchronously with the fixed shaft 86, and the fixed guide plate 61 has a stacking drive motor 87 that is pulverizedly connected to the fixed shaft 86. The sheet material handling mechanism of this embodiment includes a material handling plate 88, which is fixedly installed on the sheet stacking mounting frame 71. Negative pressure suction holes are arrayed on the bottom surface of the material handling plate 88.

[0089] The stacking platform replacement mechanism 90 of this embodiment is used to remove the cell carrier platform 10 and the stacked cell 1, and replace it with a new cell carrier platform 10 at the first placement station 32. The cell carrier platform replacement mechanism of this embodiment includes a support base 91, on which a transfer track 92 is provided, and the stacking seat 31 slides in cooperation with the transfer track 92. Along the transfer track 92, the support base 91 is sequentially provided with a stacking station for cell stacking, a transfer station for removing the cell carrier platform 10 and the stacked cell 1, and a replacement station for placing a new cell carrier platform 10 at the first placement station 32. The support base 91 is provided with a transfer drive mechanism for driving the stacking seat 31 to move along the transfer track 92; in this embodiment, the transfer drive mechanism is a screw mechanism. Figure 13 The replacement station shown in this embodiment is equipped with a lifting support 93 and a lifting mechanism 94 for driving the lifting support 93 to move in a vertical direction perpendicular to the transfer track. The lifting support 93 is provided with a second placement station 95 for placing the battery cell support platform 10. The lifting support 93 in this embodiment is provided with a lifting support plate 96, the second placement station 95 is disposed on the lifting support plate 96, and the stacking seat 31 is provided with a clearance groove corresponding to the lifting support plate 96.

[0090] In this embodiment, a cell transfer device is provided at the transfer station, such as... Figure 14As shown, the battery cell transfer device of this embodiment includes a battery cell transfer fixture 100 and a fixture moving device 123 for driving the battery cell transfer fixture to move. The fixture moving device 123 can be implemented in various ways. In this embodiment, the fixture moving device can drive the battery cell transfer fixture 100 to move vertically and horizontally. Of course, in some other embodiments, the fixture moving device 123 can also be a robotic arm, with the battery cell transfer fixture 100 mounted at the end of the robotic arm, and the robotic arm driving the battery cell transfer fixture 100 to move.

[0091] like Figure 15-17As shown, the battery cell transfer fixture 100 of this embodiment includes a transfer bracket 101. The transfer bracket 101 is provided with a second clamping assembly for pre-clamping a second battery cell carrier platform 103 and a first clamping assembly for clamping a first battery cell carrier platform 102 carrying battery cells. In this embodiment, the first clamping assembly includes two first hook units disposed opposite to each other. The first hook unit includes a first hook seat 104 that slides with the transfer bracket 101 with a single degree of freedom. The first hook seat 104 is provided with a first hook 105 for hooking the first battery cell carrier platform 102. The transfer bracket 101 is provided with a first hook driving mechanism 106 for driving the first hook seat 104 to move. Similarly, the second clamping assembly in this embodiment includes two opposing second clamping hook units. Each second clamping hook unit includes a second clamping hook seat 107 that slides with the transfer bracket 101 with a single degree of freedom. The second clamping hook seat 107 is provided with a second clamping hook 108 for hooking the second cell support platform 103. The transfer bracket 101 is provided with a second clamping hook driving mechanism 109 for driving the second clamping hook seat 107 to move. In this embodiment, the transfer bracket 101 is provided with a clamping track 110. Both the second clamping hook seat 107 and the first clamping hook seat 104 are mounted on the clamping track 110, and the two second clamping hook seats 107 of the second clamping assembly are located between the two first clamping hook seats 104 of the first clamping assembly. In this embodiment, the first clamping hook driving mechanism 106 uses a first cylinder mounted on the transfer bracket 101. The piston rod of the first cylinder is connected to the first clamping hook seat 104. The first cylinder and the first clamping hook seat 104 are arranged in a one-to-one correspondence. By using two first cylinders to drive the corresponding first clamping hook seat 104 to move towards each other along the clamping track 110, the first battery cell carrying platform 102 can be clamped and fixed. Similarly, the second clamping hook driving mechanism 109 in this embodiment also uses a second cylinder fixedly mounted on the transfer bracket 101. The piston rod of the second cylinder is connected to the second clamping hook seat 107. The second cylinder and the second clamping hook seat 107 are arranged in a one-to-one correspondence. By using two second cylinders to drive the corresponding second clamping hook seat 107 to move towards each other along the clamping track 110, the second battery cell carrying platform 103 can be clamped and fixed. Of course, in other embodiments, the first hook drive mechanism 106 that drives the first hook seat 104 to move along the clamping track 110 and the second hook drive mechanism 109 that drives the second hook seat 107 to move along the clamping track 110 can also be implemented in other ways, such as hydraulic cylinder, electric cylinder, screw mechanism, gear and rack mechanism, etc., which will not be described in detail here.

[0092] In this embodiment, the transfer bracket 101 is provided with a connecting seat 111, which is connected to the clamp moving device to drive the cell transfer clamp 100 to move.

[0093] In this embodiment, the transfer bracket 101 is equipped with a winding drive assembly for driving the winding rollers 17 of the second cell support platform 103 to rotate. The winding drive assembly includes a docking bracket 112, which has docking shafts 113 that dock with the two winding rollers 17 of the second cell support platform 103 respectively. The docking bracket 112 also has a first power device 114 for driving the docking shafts 113 to rotate, thereby driving the corresponding winding rollers 17 to rotate. In this embodiment, the first power device 114 is a pneumatic pump; however, in other embodiments, the first power device 114 can also be a motor. In a preferred embodiment, the docking bracket 112 has docking arms 115 at both ends that rotate with it, and the docking shafts 113 and the first power device 114 are both mounted on the docking arms 115. The docking bracket 112 also has a second power device 116 for driving the docking arms 115 to rotate. In this embodiment, the second power device 116 is a pneumatic pump; however, in other embodiments, the second power device 116 can also be a motor. The docking arm 115 is correspondingly arranged with the connecting rods 19 respectively provided on both sides of the second cell support platform 103. In a preferred embodiment, the rotating shaft between the docking arm 115 and the docking bracket 112 is coaxial with the connecting shaft 21, and the distance between the docking shaft 113 and the rotating shaft between the docking arm 115 and the docking bracket 112 is equal to the distance between the rotating shaft of the winding roller 17 and the corresponding rotating shaft 21. In a preferred embodiment of this example, a docking track 117 is installed on the transfer bracket 101, and the docking bracket 112 is slidably installed on the docking track 117. The docking track 117 is parallel to the docking shaft 113, and the transfer bracket 101 is provided with a docking drive mechanism 118 for driving the docking bracket 112 to move along the docking track 117. In this embodiment, the docking drive mechanism 118 is a cylinder. Of course, in other embodiments, the docking drive mechanism 118 can also be a hydraulic cylinder, an electric cylinder, a screw mechanism, or a gear and rack mechanism, etc., which will not be described in detail here.

[0094] In this embodiment, the transfer bracket 101 is further provided with a spreading assembly for controlling the distance between the transmission belt 18 of the second cell carrying platform 103 and the cell carrying surface. The spreading assembly in this embodiment includes a spreading bracket 119, on which spreading plates 120 are respectively located on both sides of the transfer bracket 101 to spread the transmission belt 18 of the second cell carrying platform 103. In this embodiment, the transfer bracket 101 is provided with a linear bearing 121, and the spreading bracket 119 is provided with guide posts 122 that cooperate with the linear bearing 121. By setting a spreading component on the transfer bracket 101, the spreading component first spreads the transmission belt 18 of the second cell support platform 103. During the process of placing the second cell support platform 103 down on the cell 1, the transmission belt 18 of the second cell support platform 103 first contacts the cell 1. After the cell is fixed by the transmission belt, the second cell support platform 103 is placed on the cell 1 as a whole. This can further prevent misalignment between the electrode layers of the cell that has not yet undergone the hot pressing process.

[0095] The stacking apparatus of this embodiment sets a stacking seat on the stacking stage assembly and a first placement station on the stacking seat. The cell carrier platform is placed on the first placement station. Thus, during the cell production process, the stacking assembly directly stacks the cells on the cell carrier platform. After the cells are stacked, the stacking stage replacement mechanism moves the stacking seat to the removal station, and the cells and the cell carrier platform are removed and transferred as a whole. Then, the stacking seat is moved to the replacement station, where a new cell carrier platform is replaced. Finally, the stacking seat is moved to the stacking station for the next cell stacking production. This process is repeated, which not only meets the production requirements of cell stacking, but also prevents misalignment between the electrode layers of the cell during the transfer process by making the cell carrier platform and the cell transfer synchronously, thus improving the accuracy of cell stacking.

[0096] By installing a pressing device on the stacking seat, and by installing pressing assemblies at both ends of the stacking seat, the two pressing assemblies can press the two ends of the stacked battery cells respectively. By setting the pressing assemblies as two double pressing linkage mechanisms, the two pressing mechanisms belonging to the same double pressing linkage mechanism can move synchronously in advance or retract, and the pressing mechanisms belonging to two separate double pressing linkage mechanisms can move in advance and retract respectively. In this way, the two double pressing linkage mechanisms can alternately press on the battery cells to meet the requirements of pressing switching during battery cell stacking. The principle of the pressing mechanism is as follows: When the inner side plate moves along the first track, under the action of the double hinge connecting rod between the inner and outer side plates, the outer side plate moves relative to the inner side plate along the second track. At the same time, the movement of the outer side plate is also constrained by the moving shaft, and the movement of the moving shaft is constrained by the pressing track. The constraint allows the outer plate to move relative to the support plate along the pressure tool track. By setting a straight infeed section, a straight retraction section, a downward tilting section, and an upward tilting section on the pressure tool track, the moving shaft rotates along the pressure tool track. When the moving shaft is in the straight infeed section, the pressure tool mounted on the outer plate moves towards the stacking seat (i.e., the infeed movement); when the moving shaft is in the downward tilting section, the pressure tool moves downward towards the stacking seat (i.e., the downward movement); when the moving shaft is in the straight retraction section, the pressure tool moves away from the stacking seat (i.e., the retraction movement); when the moving shaft is in the upward tilting section, the pressure tool moves upward (i.e., the lifting movement). In this way, only one power source is needed to drive the inner plate to move along the second track, which can drive the pressure tool to realize the infeed, downward, retraction, and lifting actions, effectively simplifying the structure and improving the reliability of the equipment.

[0097] The specific implementation of the cell stacking and transfer method of the present invention will be described below in conjunction with the above-described stacking device.

[0098] The cell stacking transfer method of this embodiment includes the following steps:

[0099] Step 1: Place the first cell carrier platform 102 on the first placement station 32 of the stacking seat 31.

[0100] Step 2: Drive the stacking stand 31 from the replacement station to the stacking station of the stacking device.

[0101] Step 3: Stack the cells on the first cell carrier platform 103 using the stacking assembly.

[0102] Step 4: After the cell stacking is completed, drive the stacking stand 31 from the stacking station to the transfer station of the stacking device; and during the process of driving the stacking stand 31 from the stacking station to the transfer station, use the pressing knife to keep the cell 1 pressed.

[0103] Step 5: Cover the battery cell 1 with the second battery cell support platform 103, and remove the first battery cell support platform 102, the second battery cell support platform 103, and the battery cell 1 located between the first battery cell support platform 102 and the second battery cell support platform 103 as a whole from the first placement station 32. Specifically, the battery cell transfer steps are as follows:

[0104] 51) The second battery cell carrier platform 103 is pre-clamped on the battery cell transfer fixture 100, with the battery cell carrier surface of the second battery cell carrier platform 103 facing downwards, and the transmission belt 18 covering the battery cell carrier surface of the second battery cell carrier platform 103 is pushed downwards; after the transmission belt 18 covering the battery cell carrier surface of the second battery cell carrier platform 103 is pushed downwards, the transmission belt 18 forms a battery cell covering section for covering the battery cell; drive the battery cell transfer fixture 100 to move and align the battery cell carrier surfaces of the second battery cell carrier platform 103 and the first battery cell carrier platform 102;

[0105] 52) Drive the cell transfer fixture 100 to move downwards, so that the transmission belt 18 that is stretched on the second cell support platform 103 covers the cell 1, and then remove the pressure knife 33 from the cell 1.

[0106] 53) Drive the cell transfer clamp 100 to continue moving downward until the cell bearing surface of the second cell bearing platform 103 presses on the cell 1, and then use the cell transfer clamp 100 to clamp the first cell bearing platform 102, so that the cell 1 is fixed between the first cell bearing platform 102 and the second cell bearing platform 103.

[0107] Specifically, during the process of driving the cell transfer fixture 100 to continue moving downward, the winding roller 17 of the second cell support platform 103 is driven to rotate to wind up the transmission belt 18, so as to control the distance between the cell covering section and the cell support surface of the second cell support platform 103, so that the distance between the cell covering section and the cell support surface of the second cell support platform 103 is equal to or approximately equal to the distance between the cell support surface of the second cell support platform 103 and the upper surface of the cell; of course, in some other embodiments, the cell transfer fixture 100 may also be driven to continue moving downward until the cell support surface of the second cell support platform 103 is pressed on the cell 1, at which time the cell covering section covers the cell support surface of the second cell support platform 103, and the winding roller 17 of the second cell support platform is driven to rotate to wind up the transmission belts 18 on both sides of the cell covering section.

[0108] 54) Drive the cell transfer fixture 100 to move, and move the first cell carrier platform 102, the second cell carrier platform 103 and the cell 1 as a whole out of the transfer station to realize cell transfer.

[0109] Step 6: Drive the stacking station 31 from the transfer station to the replacement station, and transfer the first cell carrier platform 103, which was previously placed in the second placement station 95, to the first placement station 32; repeat step 2.

[0110] The embodiments described above are merely preferred embodiments for fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A method for transferring battery cell stacking, characterized in that: Includes the following steps: Step 1: Place the first cell carrier platform at the first placement station of the stacking unit; Step 2: Move the stacking stand from the replacement station to the stacking station of the stacking device; Step 3: Stack the cells using the stacking assembly on the first cell carrier platform; Step 4: After the cell stacking is completed, the stacking stand is moved from the stacking station to the transfer station of the stacking device; Step 5: Cover the battery cell with the second battery cell support platform, and remove the first battery cell support platform, the second battery cell support platform, and the battery cell located between the first battery cell support platform and the second battery cell support platform as a whole from the first placement station; Step 6: Drive the stacking station from the transfer station to the replacement station, and transfer the first cell carrier platform, which was previously placed in the second placement station, to the first placement station; repeat step 2.

2. The cell stacking transfer method according to claim 1, characterized in that: In step four, during the process of driving the stacking station to move from the stacking station to the transfer station, the pressure knife is used to keep the battery cell in a pressed state.

3. The cell stacking transfer method according to claim 2, characterized in that: In step five, the method for moving the battery cell from the first placement site is as follows: 51) Pre-clamp the second battery cell carrier platform on the battery cell transfer fixture, so that the battery cell carrier surface of the second battery cell carrier platform faces downward, and push the transmission belt covering the battery cell carrier surface of the second battery cell carrier platform downward. Drive the cell transfer fixture to move so that the cell-bearing surface of the second cell-bearing platform is aligned with the cell-bearing surface of the first cell-bearing platform; 52) Drive the cell transfer fixture downwards so that the transmission belt on the second cell support platform covers the cell, and then remove the pressure knife from the cell. 53) Drive the cell transfer fixture to continue moving downward until the cell-bearing surface of the second cell-bearing platform presses on the cell. Then, use the cell transfer fixture to clamp the first cell-bearing platform so that the cell is fixed between the cell-bearing surfaces of the first and second cell-bearing platforms. 54) Drive the cell transfer fixture to move, and remove the first cell carrier platform, the second cell carrier platform, and the cell located between the first cell carrier platform and the second cell carrier platform as a whole from the first placement station.

4. The cell stacking transfer method according to claim 3, characterized in that: In step 51), the transmission belt covering the cell-bearing surface of the second cell-bearing platform is pushed downward to form a cell-bearing section for covering the cell.

5. The cell stacking transfer method according to claim 4, characterized in that: In step 53), as the battery cell transfer fixture continues to move downwards, the winding rollers of the second battery cell carrying platform are driven to rotate to wind up the transmission belt; or, The drive cell transfer fixture continues to move downwards until the cell-bearing surface of the second cell-bearing platform presses onto the cell. At this point, the cell-covering section covers the cell-bearing surface of the second cell-bearing platform, and the drive roller of the second cell-bearing platform rotates to wind up the drive belts on both sides of the cell-covering section.

6. The cell stacking transfer method according to any one of claims 3-5, characterized in that: The first and second battery cell carrier platforms adopt the same structure. The battery cell carrier platform includes a carrier platform body and a battery cell transfer assembly. The carrier platform body is provided with a battery cell carrier surface for carrying the battery cell. A platform support frame is provided on the surface of the carrier platform body opposite to the battery cell carrier surface. The battery cell transfer assembly includes winding rollers located on the front and rear sides of the carrier platform body, respectively. A transmission belt covering the battery cell carrier surface is provided between the two winding rollers.

7. The cell stacking transfer method according to claim 6, characterized in that: The transfer station is equipped with a cell transfer device, which includes a cell transfer fixture and a fixture moving device for driving the cell transfer fixture to move; the cell transfer fixture includes a transfer bracket, which is provided with: The first clamping assembly is used to clamp the first battery cell carrier platform carrying the battery cell; The second clamping assembly is used to clamp the second battery cell carrier platform; A tape drive assembly is used to drive the tape rollers of the second cell support platform to rotate; The expansion assembly is used to control the distance between the drive belt of the second cell support platform and the cell support surface.

8. The cell stacking transfer method according to claim 7, characterized in that: The second clamping assembly includes two second clamping hook units arranged opposite to each other. Each second clamping hook unit includes a second clamping hook seat that slides with the transfer bracket with a single degree of freedom. The second clamping hook seat is provided with a second clamping hook for hooking the second cell carrying platform. The transfer bracket is provided with a second clamping hook driving mechanism for driving the second clamping hook seat to move.

9. The cell stacking transfer method according to claim 7, characterized in that: The first clamping assembly includes two first clamping hook units arranged opposite to each other. Each first clamping hook unit includes a first clamping hook seat that slides with the transfer bracket with a single degree of freedom. The first clamping hook seat is provided with a first clamping hook for hooking the first cell carrying platform. The transfer bracket is provided with a first clamping hook driving mechanism for driving the first clamping hook seat to move.

10. The cell stacking transfer method according to claim 7, characterized in that: The winding drive assembly includes a docking bracket, which is provided with docking shafts that are respectively docked with two winding rollers of the second cell carrying platform, and the docking bracket is provided with a first power device for driving the docking shafts to rotate, thereby driving the corresponding winding rollers to rotate.

11. The cell transfer method according to claim 10, characterized in that: The docking bracket has docking arms at both ends that are rotatably coupled with it, and the docking shaft and the first power device are both mounted on the docking arms; the docking bracket is provided with a second power device for driving the docking arms to rotate.

12. The cell transfer method according to claim 10, characterized in that: The transfer bracket is equipped with a docking rail, the docking bracket is slidably mounted on the docking rail, and the transfer bracket is provided with a docking drive mechanism for driving the docking bracket to move along the docking rail.

13. The cell stacking transfer method according to claim 7, characterized in that: The spreading assembly includes a spreading bracket, on which are spreading plates located on both sides of the transfer bracket to spread the transmission belt of the second cell carrying platform; the transfer bracket is provided with a linear bearing, and the spreading bracket is provided with a guide post that cooperates with the linear bearing.

14. The cell stacking transfer method according to any one of claims 1-5, characterized in that: The stacking device includes: A stacking table assembly includes a stacking base and a cell carrying platform. The stacking base is provided with a first placement station, and the cell carrying platform is placed at the first placement station. A pressing device is provided on the stacking base corresponding to the cell carrying platform. A cell stacking assembly is used for stacking cells on a cell carrier platform. The stacking table replacement mechanism is used to remove the cell carrier platform and the stacked cells and replace them with a new cell carrier platform at the first placement station. The stacking table replacement mechanism includes a support base, on which a transfer track is provided. The stacking table slides in conjunction with the transfer track. Along the direction of the transfer track, the support base is provided with a stacking station for stacking cells, a transfer station for removing the cell carrier platform and the stacked cells, and a replacement station for placing a new cell carrier platform on the first placement station. The support base is provided with a transfer drive mechanism for driving the stacking base to move along the transfer track.

15. The cell stacking transfer method according to claim 14, characterized in that: The pressing device includes two pressing assemblies, which are located at both ends of the stacking base. Each pressing assembly includes two double pressing linkage mechanisms, which each includes two pressing mechanisms. The two pressing mechanisms are symmetrically arranged on both sides of the same end of the stacking base. The pressing mechanism includes a pressing mechanism, a pressing mechanism for moving the pressing mechanism, and a pressing mechanism for driving the pressing mechanism. The pressing knife moving mechanism includes a support plate, an inner side plate, an outer side plate, and a moving shaft. The inner side plate is located between the support plate and the outer side plate. The support plate is provided with a first track, and the inner side plate is slidably engaged with the first track. The inner side plate is provided with a second track, and the outer side plate is slidably engaged with the second track. The first track and the second track are perpendicular to each other, and the pressing knife is mounted on the outer side plate. The support plate is provided with a pressing track for constraining the movement trajectory of the pressing tool; the pressing track includes a straight section for advancing and a straight section for retracting that are parallel to each other, the straight section for advancing is located above the straight section for retracting, and a downward pressing section and an upward lifting section are respectively provided between the two ends of the straight section for advancing and the straight section for retracting. The inner end of the moving shaft is slidably engaged with the pressure knife track; the inner side plate is provided with a hollow hole for the moving shaft to pass through, and the outer side plate is rotatably engaged with the moving shaft; A double-hinged connecting rod is provided between the outer side plate and the inner side plate, and the double-hinged connecting rod is hinged to the outer side plate and the inner side plate respectively; the first track is parallel to the infeed straight section, and the pressure drive mechanism is used to drive the inner side plate to move along the first track; The inner plates of the two pressing mechanisms belonging to the same dual pressing linkage mechanism move synchronously in opposite directions along the corresponding first track to drive the pressing blades of the two pressing mechanisms to perform synchronous infeed or retraction movements; the inner plates of the two pressing mechanisms located on the same side of the same end of the stacking seat move synchronously in opposite directions along the corresponding first track to drive the pressing blades of the two pressing mechanisms to perform infeed and retraction movements respectively.

16. The cell stacking transfer method according to claim 15, characterized in that: The pressing knife moving mechanism also includes a fixed shaft, which is mounted on the support plate. The fixed shaft is provided with a guide plate that rotates with it, and the guide plate is provided with a constraint track for assisting the rotation of the moving shaft. The outer end of the moving shaft slides with the constraint track.

17. The cell stacking transfer method according to claim 16, characterized in that: The constraint track includes a first constraint section and a second constraint section, and a reversing transition section is provided between the first constraint section and the second constraint section. When the inner end of the moving shaft is located between the retraction straight section and the downward tilting section, and when the inner end of the moving shaft is located between the feed straight section and the upward tilting section, the outer end of the moving shaft is located within the reversing transition section.

18. The cell stacking transfer method according to claim 15, characterized in that: The pressing knife assembly also includes a pressing knife mounting bracket, and the support plate is fixedly mounted on the pressing knife mounting bracket; the pressing knife mounting bracket is slidably engaged with vertical rails provided at both ends of the stacking seat, and an electromagnet assembly for driving the pressing knife mounting bracket to move along the vertical rails is provided between the pressing knife mounting seat and the stacking seat.

19. The cell stacking transfer method according to claim 14, characterized in that: The replacement station is equipped with a lifting support and a lifting mechanism for driving the lifting support to move in a vertical direction perpendicular to the transfer track. The lifting support is equipped with a second placement station for placing the stacking table. The lifting support is equipped with a lifting support plate, and the second placement station is located on the lifting support plate. The stacking table is equipped with a clearance groove corresponding to the lifting support plate.

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