A lamination device

Abstract

The application relates to the technical field of laminated battery production, in particular to a laminating device which comprises a laminating table and flattening mechanisms for compacting pole pieces and diaphragms to form battery cells; the flattening mechanisms are four and are respectively distributed at the corners of the laminating table; two flattening mechanisms along the direction perpendicular to the diaphragm flatly laying the laminating table form a group, the flattening mechanisms in the same group are synchronously driven, and the flattening mechanisms in different groups alternately compact the pole pieces on the laminating table; the output shaft of the driving assembly of the flattening mechanism is connected with the second end of the first swing piece, is used for driving the first swing piece to rotate around the output shaft, drives the first cam to slide in the first sliding rail groove, under the guidance of the guide rail and the guide groove, the first cam drives the moving piece to move up and down, under the guidance of the second cam and the second sliding rail groove, the moving piece drives the second swing piece to swing, and the pressing needle assembly completes the lifting, pressing and overturning actions. The laminating device improves the laminating efficiency through the action coordination of the flattening mechanisms and the diaphragms, and solves the problem of low laminating efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of laminated battery production, and in particular to a laminated device. Background Art

[0002] As the length of existing power battery cells (350mm-600mm) becomes longer and longer, the length of the lamination press cannot be indefinitely extended to compress the pole pieces, and the downward pressing action cannot be fully coordinated with the action of the diaphragm, resulting in low production efficiency of laminated batteries. Summary of the Invention

[0003] In view of this, the purpose of the present application is to provide a lamination device for solving the technical problem in the prior art that the pressing knife action cannot coordinate with the diaphragm action, resulting in low lamination efficiency.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A lamination device comprises a lamination platform and a flattening mechanism for compacting pole pieces and diaphragms to form a battery cell;

[0006] There are four flattening mechanisms, which are respectively distributed at the corners of the stacking platform;

[0007] Two of the flattening mechanisms along a direction perpendicular to the diaphragm laying the stack are grouped together, the flattening mechanisms in the same group are driven synchronously, and the flattening mechanisms in different groups press the pole pieces on the stack alternately;

[0008] Each of the flattening mechanisms includes a frame, a driving assembly, a first pendulum member, a moving member, a second pendulum member and a pressing needle assembly;

[0009] The frame is provided with a guide rail, and the moving member is provided with a guide groove matching the guide rail;

[0010] The first end of the first pendulum member is connected to a first cam, and the moving member is provided with a first slide rail groove matching the first cam;

[0011] The second pendulum member is rotatably connected to the moving member via a connecting shaft, and the pressure needle assembly is connected to the second pendulum member;

[0012] The second pendulum is connected to a second cam, and the frame is provided with a second slide rail groove matching the second cam;

[0013] The output shaft of the driving assembly is connected to the second end of the first pendulum member, and is used to drive the first pendulum member to rotate around the output shaft, driving the first cam to slide in the first slide rail groove. Under the guidance of the guide rail and the guide groove, the first cam drives the moving member to move up and down. Under the guidance of the second cam and the second slide rail groove, the moving member drives the second pendulum member to swing through the connecting shaft, so that the pressure needle assembly completes the lifting, pressing and flipping action.

[0014] Preferably, in the above-mentioned lamination device, the stacking direction perpendicular to the diaphragm is specifically the length direction of the pole piece.

[0015] Preferably, in the above-mentioned lamination device, the pressing needle assembly includes an adjusting cylinder and a pressing knife;

[0016] The piston rod of the regulating cylinder is connected to the pressing knife and is used to adjust the pressing degree of the pressing knife on the electrode sheet.

[0017] Preferably, in the above-mentioned lamination device, it further comprises a clamping track extending in the direction of the lamination platform;

[0018] The bottom of each frame is provided with a clamping groove which is slidably matched with the clamping rail.

[0019] Preferably, in the above-mentioned lamination device, the second slide rail groove is curved;

[0020] The second slide rail groove includes a first curved segment and a second curved segment connected in sequence;

[0021] The first curved segment bends and extends upward, and a center line thereof is located on a side away from the pole piece;

[0022] The connecting end of the second curved segment and the first curved segment bends and extends upward, and the center line thereof is located on a side close to the pole piece.

[0023] Preferably, in the above-mentioned lamination device, the guide rail is arranged along the vertical direction, and the first slide rail groove is arranged along the horizontal direction.

[0024] Preferably, in the above-mentioned lamination device, the second rocking member is in an inverted T-shape, and the second rocking member includes a rotating arm and a swinging arm;

[0025] The connecting shaft is connected to the middle portion of the rotating arm;

[0026] The second cam is arranged on the rotating arm at a position higher than the connecting shaft;

[0027] The swing arm is connected to the bottom of the rotating arm, and the pressure needle assembly is connected to an end of the swing arm close to the pole piece.

[0028] Preferably, in the above-mentioned laminating device, the connecting shaft is sleeved with a cylinder;

[0029] The moving part is detachably connected with the cylinder.

[0030] Preferably, in the above-mentioned laminating device, a plurality of material taking avoiding position openings are arranged on the laminating table.

[0031] Each of the material taking avoiding position openings is provided with a matched lifting part.

[0032] The lifting part is connected with a lifting cylinder.

[0033] Preferably, in the above-mentioned laminating device, a height adjusting assembly is arranged at the bottom of the laminating table, for adjusting the height of the laminating table.

[0034] Compared with the prior art, the application has the following beneficial effects:

[0035] (1) During operation, when the diaphragm is laid flat on the pole piece from the first side of the laminating table, the pressing needle assemblies of the two flattening mechanisms at the second side of the laminating table simultaneously press the same side of the pole piece, and when the diaphragm is laid flat on the pole piece from the first side of the laminating table to the second side of the laminating table, the pressing needle assemblies of the two flattening mechanisms at the second side of the laminating table exit the range of the pole piece, and at the same time, the pressing needle assemblies of the two flattening mechanisms at the first side of the laminating table press the other side of the pole piece through synchronous movement, and when the diaphragm is laid flat on the pole piece from the second side of the laminating table to the first side of the laminating table, the pressing needle assemblies of the two flattening mechanisms at the first side of the laminating table exit the range of the pole piece, and at the same time, the pressing needle assemblies of the two flattening mechanisms at the second side of the laminating table re-press the pole piece, realizing the coordination of the action of the flattening mechanism and the diaphragm, effectively preventing the deviation of the pole piece, improving the alignment of the laminated piece, ensuring the smooth completion of the laminated piece operation, and being beneficial to improving the quality and efficiency of the laminated piece, and effectively solving the technical problem of low laminated piece efficiency caused by the failure of the action of the pressing knife to coordinate with the action of the diaphragm in the prior art;

[0036] (2) When a single flattening mechanism moves, the driving assembly drives the first swing part to rotate around the output shaft, drives the first cam to slide in the first sliding rail groove, and under the mutual limiting and guiding action of the guide rail and the guide groove, the first cam drives the moving part to move up and down, and under the mutual limiting and guiding action of the second cam and the second sliding rail, the moving part drives the second swing part to swing through the connecting shaft, so that the pressing needle assembly completes the up-lifting and down-pressing flip action, which can quickly complete the pressing of the pole piece during the laminating process. Compared with the step-by-step control mode of the existing pressing knife which adopts vertical lifting and horizontal movement, the application can increase the length of the pressing needle assembly of the pressing knife for long battery cells (350mm-600mm), and can also improve the action efficiency of the pressing knife, the movement time of the pressing knife is shorter, and the operation efficiency of the pole piece pressing knife is greatly improved, thereby being beneficial to improving the production efficiency of the entire laminated battery. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0038] Figure 1 A schematic structural diagram of a lamination device provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of a single flattening mechanism of a lamination device provided in an embodiment of the present application;

[0040] Figure 3 This is a diagram showing the internal structure of a frame of a single flattening mechanism of a lamination device provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of the installation of a second cam and a second slide rail groove of a lamination device provided in an embodiment of the present application;

[0042] Figure 5 This is a diagram of the internal structure of a frame of a single flattening mechanism of a lamination device provided in an embodiment of the present application, taken along another direction;

[0043] Figure 6 A schematic diagram of the connection between a first pendulum member, a moving member, a connecting shaft and a second pendulum member of a lamination device provided in an embodiment of the present application.

[0044] In the picture:

[0045] 100, flattening mechanism; 110, frame; 111, guide rail; 112, second slide rail groove; 1121, first curved segment; 1122, second curved segment; 113, through hole; 114, snap-fit ​​groove; 120, drive assembly; 121, motor; 122, reducer; 130, first pendulum; 140, moving part; 141, slider; 142, guide groove; 143, first slide rail groove; 144, cylinder; 150, connection Shaft; 160, second pendulum; 161, rotating arm; 162, swing arm; 170, needle pressing assembly; 171, adjusting cylinder; 172, knife pressing; 180, first cam; 181, first center axis; 182, nut; 190, second cam; 191, second center axis; 200, stacking table; 210, material removal avoidance port; 300, height adjustment assembly; 400, lifting member; 410, lifting cylinder; 500, clamping track. DETAILED DESCRIPTION

[0046] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0047] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] Please refer to Figures 1-6, the embodiment of the present application provides a lamination device, including a stacking platform 200 and a flattening mechanism 100 for compacting the electrode sheets and the diaphragm to form a battery cell; there are four flattening mechanisms 100, which are respectively distributed at the corners of the stacking platform 200; two flattening mechanisms 100 along the direction perpendicular to the diaphragm flattening stacking platform 200 form a group, the flattening mechanisms 100 in the same group are driven synchronously, and the flattening mechanisms 100 in different groups alternately compact the electrode sheets on the stacking platform 200; each flattening mechanism 100 includes a frame 110, a driving assembly 120, a first pendulum 130, a moving member 140, a second pendulum 160 and a pressing needle assembly 170; a guide rail 111 is provided on the frame 110, and the moving member 140 is provided with a guide groove 142 matching the guide rail 111; the first end of the first pendulum 130 is connected to the first cam 180, and the moving member 140 is provided with a guide groove 142 matching the first cam 180 80; the second pendulum 160 is rotatably connected to the movable part 140 through the connecting shaft 150, and the pressing needle assembly 170 is connected to the second pendulum 160; the second pendulum 160 is connected to the second cam 190, and the frame 110 is provided with a second slide rail groove 112 matching the second cam 190; the output shaft of the driving assembly 120 is connected to the second end of the first pendulum 130, for driving the first pendulum 130 to rotate around the output shaft, driving the first cam 180 to slide in the first slide rail groove 143, under the guidance of the guide rail 111 and the guide groove 142, the first cam 180 drives the movable part 140 to move up and down, under the guidance of the second cam 190 and the second slide rail groove 112, the movable part 140 drives the second pendulum 160 to swing through the connecting shaft 150, so that the pressing needle assembly 170 completes the lifting, pressing and flipping action.

[0050] More specifically, the drive assembly 120 includes a motor 121 and a reducer 122, and the reducer 122 can adjust the speed of the motor 121 according to actual needs; the moving part 140 is connected to the slider 141, and the guide groove 142 is set on the slider 141, and the slider 141 is slidingly connected to the guide rail 111 through the guide groove 142; the moving part 140 is rotatably connected to the connecting shaft 150, and the output shaft of the motor 121 is fixedly connected to the first pendulum 130 through a fastener; the first cam 180 is connected to the first pendulum 130 through the first center shaft 181 and the nut 182; the second cam 190 is connected to the second pendulum 160 through the second center shaft 191 and the nut 182; the frame 110 is provided with a plurality of through holes 113 that can reduce the weight of the frame 110.

[0051] Furthermore, in the present embodiment, along the direction perpendicular to the membrane-laying stack 200, specifically the length direction of the electrode, that is, the four flattening mechanisms 100 are respectively located at the four corners of the stack 200 and the length direction of the pressing knife 172 of the pressing needle assembly 170 is the same as the length direction of the electrode. Such an arrangement can facilitate the pressing knife 172 of the pressing needle assembly 170 to press the electrode with a longer length, and the swing time of the pressing needle assembly 170 is shorter than the movement time of the existing step-by-step control method of vertical lifting and horizontal movement. Under the premise of not affecting the coordinated action of the flattening mechanism 100 and the membrane, the length of the pressing knife 172 of the pressing needle assembly 170 can be appropriately increased to meet the demand for a longer length of the pressing knife 172 for long battery cells.

[0052] Further, in this embodiment, please refer to Figure 6 The pressure needle assembly 170 includes an adjusting cylinder 171 and a pressing knife 172. The piston rod of the adjusting cylinder 171 is connected to the pressing knife 172 and is used to adjust the degree of pressure of the pressing knife 172 on the electrode. The adjusting cylinder 171 can control the upward and downward movement of the pressing knife 172 by the extension and contraction of the piston rod, thereby facilitating the staff to adjust the degree of pressure of the pressing knife 172 on the electrode according to actual production needs. This allows the electrode to be pressed tightly without affecting the smooth flatness of the diaphragm on the electrode, and can also adapt to the pressure requirements of electrode sheets of different specifications.

[0053] Furthermore, in this embodiment, a snap-in rail 500 is included that extends toward the stacking platform 200. Each frame 110 is provided with a snap-in groove 114 at its bottom that slidably engages with the snap-in rail 500. The provision of the snap-in rail 500 and the snap-in groove 114 allows the frame 110 to be slidably mounted on the snap-in rail 500, facilitating the movement of the press needle assembly 170 in and out of the stacking platform 200 while the entire flattening mechanism 100 slides accordingly along the snap-in rail 500. The frame 110 is connected to a sliding drive mechanism that coordinates the membrane flattening operation and promptly controls the corresponding flattening mechanism 100 to move away from or toward the stacking platform 200.

[0054] More specifically, the driving assembly 120 can adopt a forward and reverse motor 121. When the pressing needle assembly 170 needs to exit the stacking platform 200, the output shaft of the motor 121 can be controlled to rotate in the opposite direction, so that the entire flattening mechanism 100 exits the stacking platform 200, and the pressing knife 172 of the pressing needle assembly 170 can restore the initial working position to prepare for the next pole piece pressing operation.

[0055] Furthermore, in this embodiment, the second slide rail groove 112 is curved; the second slide rail groove 112 includes a first curved segment 1121 and a second curved segment 1122 connected in sequence; the first curved segment 1121 bends and extends upward, and its center line is located on the side away from the pole piece; the connecting end of the second curved segment 1122 and the first curved segment 1121 bends and extends upward, and its center line is located on the side close to the pole piece. The first curved segment 1121 whose center line is located on the side away from the pole piece can guide the second cam 190 to move in the direction upward and slightly away from the pole piece, thereby driving the second pendulum 160 to swing accordingly so that the working end of the pressing knife 172 gradually tilts upward, that is, the pressing knife 172 is controlled to complete the lifting action; the second curved segment 1122 whose center line is located on the side close to the pole piece can guide the second cam 190 to move in the direction upward and close to the pole piece, thereby driving the second pendulum 160 to swing accordingly so that the working end of the pressing knife 172 gradually swings downward, that is, the pressing knife 172 is controlled to complete the pressing action. By designing a second slide rail groove 112 with a special shape, the working end of the pressing knife 172 can be guided to quickly complete the lifting, pressing and flipping actions. There is no need to adopt a step-by-step control method of vertical lifting and horizontal movement for the pressing knife 172, which effectively shortens the movement time required for the pressing knife 172 to press the pole piece, thereby improving the working efficiency of the pressing knife 172 and the production efficiency of the entire laminated battery.

[0056] More specifically, when in operation, when the pressing knife 172 of the pressing needle assembly 170 exits the stacking platform 200 , the center line of the first curved segment 1121 is located on the side away from the stacking platform 200 , and the center line of the second curved segment 1122 is located on the side close to the stacking platform 200 .

[0057] Furthermore, in this embodiment, the guide rail 111 is arranged in the vertical direction, and the first slide rail groove 143 is arranged in the horizontal direction. Since the first cam 180 connected to the first pendulum member 130 is confined in the horizontally arranged first slide rail groove 143, and the movable member 140 is vertically slidably arranged on the guide rail 111 through the guide groove 142, when the drive assembly 120 drives the output shaft to drive the first pendulum member 130 to rotate, the first cam 180 swings accordingly with the first pendulum member 130, thereby generating a force that pushes the movable member 140 to move up and down, causing the movable member 140 to move along the direction of the vertical guide rail 111. Compared with a cylinder or other drive that drives the movable member 140 to move upward, this embodiment has the advantages of fast response time, controllable movement distance, and good movement stability.

[0058] Furthermore, in this embodiment, the second rocker member 160 is in an inverted T-shape and includes a rotating arm 161 and a swing arm 162. The connecting shaft 150 is connected to the middle portion of the rotating arm 161. The second cam 190 is disposed on the rotating arm 161 at a position higher than the connecting shaft 150. The swing arm 162 is connected to the bottom of the rotating arm 161, and the pressing needle assembly 170 is connected to the end of the swing arm 162 near the pole piece. When the second cam 190 slides within the specially shaped second slide rail groove 112, the rotating arm 161 rotates accordingly following the connecting shaft 150, and the swing arm 162 drives the pressing blade 172 to swing accordingly, so that the working end of the pressing blade 172 is first lifted up and then pressed down to complete the pole piece crimping action, which can effectively prevent the pole piece from shifting and improve the alignment of the laminations.

[0059] Furthermore, in this embodiment, the connecting shaft 150 is rotatably sleeved with the cylinder 144; the movable member 140 is detachably connected to the cylinder 144. The cylinder 144 serves as a connecting member for the movable member 140 to be rotatably sleeved on the connecting shaft 150, thereby limiting the smooth rotation of the connecting shaft 150 within the cylinder 144 while maintaining the detachability between the movable member 140 and the connecting shaft 150, making it easier for personnel to disassemble and maintain the movable member 140, such as adding lubricating oil.

[0060] Furthermore, in this embodiment, a plurality of material removal avoidance openings 210 are provided on the stacking platform 200; each material removal avoidance opening 210 is provided with a matching lifting member 400; and the lifting member 400 is connected to a lifting cylinder 410. By providing the material removal avoidance openings 210, it can play a role of avoiding the gripping part of the manipulator when the manipulator needs to remove the stacked battery cells on the stacking platform 200, so that the manipulator can smoothly remove the stacked battery cells from the stacking platform 200 in order to transport the battery cells to the next operation point. The lifting member 400 can fill the vacancy of the material removal avoidance opening 210 during the stacking operation to ensure the integrity of the stacking platform 200, and the lifting member 400 can be controlled by the lifting cylinder 410 to leave the material removal avoidance opening 210 according to the material removal demand, so that the material removal operation can be completed smoothly.

[0061] Furthermore, in this embodiment, a height adjustment assembly 300 is provided at the bottom of the stacking platform 200 for adjusting the height of the stacking platform 200. Since the thickness of the positive and negative electrode sheets and the separator stack will also change as the stacking process progresses, the height adjustment assembly 300 can be used to appropriately adjust the height position of the stacking platform 200 during the production process, so that the pressing blade 172 of the flattening mechanism 100 can still press the electrode sheets tightly during the thickness change of the laminated battery cell.

[0062] Beneficial effects of this embodiment:

[0063] (1) During operation, when the diaphragm starts to be spread on the electrode from the first side of the stack 200, the pressure needle assemblies 170 of the two flattening mechanisms 100 on the second side of the stack 200 synchronously press the same side of the electrode. When the diaphragm is spread on the electrode from the first side of the stack 200 to the second side of the stack 200, the pressure needle assemblies 170 of the two flattening mechanisms 100 on the second side of the stack 200 withdraw from the electrode range. At the same time, the pressure needle assemblies 170 of the two flattening mechanisms 100 on the first side of the stack 200 press the other side of the electrode through synchronous movement. Similarly, when the diaphragm is spread on the electrode from the first side of the stack 200 to the second side of the stack 200, the pressure needle assemblies 170 of the two flattening mechanisms 100 on the second side of the stack 200 withdraw from the electrode range. When the two sides are laid flat on the first side of the stacking platform 200, the two pressing needle assemblies 170 of the flattening mechanism 100 on the first side of the stacking platform 200 withdraw from the pole piece range, and at the same time, the two pressing needle assemblies 170 of the flattening mechanism 100 on the second side of the stacking platform 200 re-press the pole piece, thereby realizing the coordinated action of the flattening mechanism 100 and the diaphragm, which can effectively prevent the deviation of the pole piece, improve the alignment of the stacking, ensure that the stacking operation can be completed smoothly, and is conducive to improving the quality and efficiency of the stacking, and effectively solving the technical problem in the prior art that the action of the pressing knife 172 cannot be coordinated with the action of the diaphragm, resulting in low stacking efficiency;

[0064] (2) When a single flattening mechanism 100 moves, the driving assembly 120 drives the first pendulum 130 to rotate around the output shaft, driving the first cam 180 to slide in the first slide groove 143. Under the mutual limiting and guiding action of the guide rail 111 and the guide groove 142, the first cam 180 drives the moving member 140 to move up and down. Under the mutual limiting and guiding action of the second cam 190 and the second slide rail, the moving member 140 drives the second pendulum 160 to swing through the connecting shaft 150, so that the pressing needle assembly 170 can be lifted up and down. The pressing and flipping action can quickly complete the crimping of the electrode sheets during the stacking process. Compared with the existing step-by-step control method of vertical lifting and horizontal movement of the pressing knife 172, this embodiment of the present application can increase the length of the pressing knife 172 of the pressing needle assembly 170 for long battery cells (350mm-600mm), and can also improve the efficiency of the pressing action of the pressing knife 172. The movement time of the pressing knife 172 is shorter, which greatly improves the operating efficiency of the electrode pressing knife 172, thereby helping to improve the production efficiency of the entire stacked battery.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lamination device, characterized in that: It includes a stacking table and a flattening mechanism for compacting the pole pieces and diaphragms to form a battery cell; There are four flattening mechanisms, which are respectively distributed at the corners of the stacking platform; Two of the flattening mechanisms along a direction perpendicular to the diaphragm laying the stack are grouped together, the flattening mechanisms in the same group are driven synchronously, and the flattening mechanisms in different groups press the pole pieces on the stack alternately; Each of the flattening mechanisms includes a frame, a driving assembly, a first pendulum member, a moving member, a second pendulum member and a pressing needle assembly; The frame is provided with a guide rail, and the moving member is provided with a guide groove matching the guide rail; The first end of the first pendulum member is connected to a first cam, and the moving member is provided with a first slide rail groove matching the first cam; The second pendulum member is rotatably connected to the moving member via a connecting shaft, and the pressure needle assembly is connected to the second pendulum member; The second pendulum is connected to a second cam, and the frame is provided with a second slide rail groove matching the second cam; The output shaft of the driving assembly is connected to the second end of the first pendulum member, and is used to drive the first pendulum member to rotate around the output shaft, driving the first cam to slide in the first slide rail groove. Under the guidance of the guide rail and the guide groove, the first cam drives the moving member to move up and down. Under the guidance of the second cam and the second slide rail groove, the moving member drives the second pendulum member to swing through the connecting shaft, so that the pressure needle assembly completes the lifting, pressing and flipping action.

2. The lamination device according to claim 1, characterized in that The stacking direction perpendicular to the diaphragm is specifically the length direction of the pole piece.

3. The lamination device according to claim 1, characterized in that The pressing needle assembly includes an adjusting cylinder and a pressing knife; The piston rod of the regulating cylinder is connected to the pressing knife and is used to adjust the pressing degree of the pressing knife on the electrode sheet.

4. The lamination device according to claim 1, characterized in that It also includes a clamping track extending toward the stacking direction; The bottom of each frame is provided with a clamping groove which is slidably matched with the clamping rail.

5. The lamination device according to claim 1, characterized in that The second slide rail groove is curved; The second slide rail groove includes a first curved segment and a second curved segment connected in sequence; The first curved segment bends and extends upward, and a center line thereof is located on a side away from the pole piece; The connecting end of the second curved segment and the first curved segment bends and extends upward, and the center line thereof is located on a side close to the pole piece.

6. The lamination device according to claim 5, characterized in that The guide rail is arranged along the vertical direction, and the first slide rail groove is arranged along the horizontal direction.

7. The lamination device according to claim 5, characterized in that: The second swing member is in an inverted T shape, and the second swing member includes a rotating arm and a swing arm; The connecting shaft is connected to the middle portion of the rotating arm; The second cam is arranged on the rotating arm at a position higher than the connecting shaft; The swing arm is connected to the bottom of the rotating arm, and the pressure needle assembly is connected to an end of the swing arm close to the pole piece.

8. The lamination device according to claim 1, characterized in that: The connecting shaft is rotatably sleeved with a cylinder; The moving member is detachably connected to the cylinder.

9. The lamination device according to claim 1, characterized in that: The stacking platform is provided with a plurality of material taking avoidance openings; Each of the material taking and avoiding openings is provided with a matching lifting member; The lifting member is connected with a lifting cylinder.

10. The lamination device according to claim 1, characterized in that A height adjustment component is provided at the bottom of the stacking platform for adjusting the height of the stacking platform.

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