Laminating mechanism and laminating device

Abstract

The present invention relates to a lamination mechanism and a lamination device, the lamination mechanism comprising a first driving member, a first rotating shaft, a first clamping member and a second clamping member, the first driving member is connected to the first rotating shaft in a transmission manner, the first clamping member and the second clamping member are arranged at one end of the first rotating shaft, the first clamping member and the second clamping member are arranged at intervals, and the first clamping member and the second clamping member are respectively located on both sides of the axis direction of the first rotating shaft, the first driving member is used to drive the first rotating shaft to rotate, so that the first rotating shaft drives the first clamping member and the second clamping member to rotate clockwise or counterclockwise around the axis direction of the first rotating shaft at the same time. By arranging the first clamping member and the second clamping member on the first rotating shaft, the rotation of the first rotating shaft drives the first clamping member and the second clamping member to move between the first position and the second position respectively, so as to realize the lamination operation, which has the characteristics of fast lamination speed and high work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and particularly to a laminating mechanism and a laminating device including the laminating mechanism. Background Art

[0002] The battery processing and manufacturing processes in related technologies include a winding process and a laminating process. The quality of the battery cells produced by the laminating process is generally higher than that of the battery cells produced by the winding process. However, compared with the relatively high winding efficiency of the winding process, the laminating efficiency of the laminating process is generally low due to the relatively cumbersome process and needs to be improved. For example, the Z-type laminating method is generally adopted in the laminating process, which basically stacks the negative electrode sheet, the separator and the positive electrode sheet in a Z-type one by one from bottom to top. In this Z-type laminating method, since the negative electrode sheet and the positive electrode sheet need to be fed onto the laminating platform in sequence, the laminating speed is slow, thereby affecting the laminating efficiency of the battery cells. Summary of the Invention

[0003] The purpose of the present invention is to provide a laminating mechanism and a laminating device with fast laminating speed and high working efficiency.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A provided laminating mechanism includes a first driving member, a first rotating shaft, a first clamping member and a second clamping member. The first driving member is in transmission connection with the first rotating shaft. The first clamping member and the second clamping member are arranged at one end of the first rotating shaft. The first clamping member and the second clamping member are arranged at intervals, and the first clamping member and the second clamping member are respectively located on both sides of the axis direction of the first rotating shaft. The first driving member is used to drive the first rotating shaft to rotate, so that the first rotating shaft drives the first clamping member and the second clamping member to rotate simultaneously around the axis direction of the first rotating shaft in the clockwise direction or the counterclockwise direction.

[0006] Further, the first clamping member and the second clamping member are symmetrically arranged on both sides of the axis of the first rotating shaft. The first rotating shaft can drive the first clamping member and the second clamping member to rotate 180 degrees simultaneously around the axis direction of the first rotating shaft, so that the first clamping member rotates from a first position to a second position, and the second clamping member rotates from the second position to the first position;

[0007] Or, the first rotating shaft can drive the first clamping member and the second clamping member to rotate 180 degrees simultaneously around the axis direction of the first rotating shaft, so that the first clamping member rotates from the second position to the first position, and the second clamping member rotates from the first position to the second position.

[0008] Further, the first clamping member rotates from the first position to the second position in a counterclockwise direction around the axis direction of the first rotating shaft, and rotates from the second position to the first position in a counterclockwise direction;

[0009] The second clamping member rotates counterclockwise from the second position to the first position around the axial direction of the first rotating shaft, and rotates counterclockwise from the first position to the second position.

[0010] Further, the lamination mechanism further comprises a second driving member, a third driving member, a second rotating shaft and a third rotating shaft, the second driving member is drivingly connected to the second rotating shaft, the first clamping member is connected to the second rotating shaft, and the second driving member is used to drive the second rotating shaft to rotate, so that the second rotating shaft drives the first clamping member to rotate in a clockwise direction or a counterclockwise direction around the axis direction of the second rotating shaft;

[0011] The third driving member is in driving connection with the third rotating shaft, and the second clamping member is connected with the third rotating shaft. The third driving member is used to drive the third rotating shaft to rotate, so that the third rotating shaft drives the second clamping member to rotate in a clockwise direction or counterclockwise direction around the axial direction of the third rotating shaft.

[0012] Further, when the second clamping member rotates from the second position to the first position around the axis direction of the first rotating shaft, the third rotating shaft can drive the second clamping member to rotate around the axis direction of the third rotating shaft;

[0013] When the first clamping member rotates from the second position to the first position around the axial direction of the first rotating shaft, the second rotating shaft can drive the first clamping member to rotate around the axial direction of the second rotating shaft.

[0014] Further, the lamination mechanism further comprises a first transmission device and a second transmission device, the first transmission device comprises a first rotating wheel, a second rotating wheel and a first belt, the first belt is sleeved on the first rotating wheel and the second rotating wheel, the first rotating wheel is coaxially arranged with the output shaft of the second driving member, the second rotating wheel is connected with the second rotating shaft, the second transmission device comprises a third rotating wheel, a fourth rotating wheel and a second belt, the second belt is sleeved on the third rotating wheel and the fourth rotating wheel, the third rotating wheel is coaxially arranged with the output shaft of the third driving member, and the fourth rotating wheel is connected with the third rotating shaft;

[0015] The second driving member is used to drive the first rotating wheel to rotate, so as to drive the second rotating wheel to rotate through the first wheel belt, thereby driving the second rotating shaft to rotate;

[0016] The third driving member is used to drive the third rotating wheel to rotate, so as to drive the fourth rotating wheel to rotate through the second belt, and then drive the third rotating shaft to rotate.

[0017] Further, the lamination mechanism further includes a fourth driving member and a fifth driving member. The fourth driving member is connected to the second rotating shaft, and the fourth driving member is used to drive the second rotating shaft to move along the length direction of the second rotating shaft, so as to drive the first clamping member to move along the length direction of the second rotating shaft;

[0018] The fifth driving member is connected to the third rotating shaft, and the fifth driving member is used to drive the third rotating shaft to move along the length direction of the third rotating shaft, so as to drive the second clamping member to move along the length direction of the third rotating shaft.

[0019] Further, the lamination mechanism further includes a connecting frame. The first rotating shaft is connected to the connecting frame. The first clamping member and the second clamping member are symmetrically arranged on both sides of the connecting frame. When the first driving member drives the first rotating shaft to rotate, the first rotating shaft drives the connecting frame to rotate.

[0020] Further, the first clamping member includes a first clamping piece and a second clamping piece. The first clamping piece and the second clamping piece are arranged oppositely. The first clamping member can be switched between a first clamping state and a first open state. The first clamping member is used to clamp the first pole piece in the first clamping state and release the first pole piece in the first open state;

[0021] The second clamping member includes a third clamping piece and a fourth clamping piece. The third clamping piece and the fourth clamping piece are arranged oppositely. The second clamping member can be switched between a second clamping state and a second open state. The second clamping member is used to clamp the second pole piece in the second clamping state and release the second pole piece in the second open state.

[0022] There is also provided a lamination device, including the above lamination mechanism.

[0023] Advantages of the present invention compared with the prior art:

[0024] For the lamination mechanism and the lamination device of the present invention, by arranging the first clamping member and the second clamping member on the first rotating shaft, the rotation of the first rotating shaft drives the first clamping member and the second clamping member to move between the first position and the second position respectively, so as to realize the lamination operation, which has the characteristics of fast lamination speed and high working efficiency. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of one direction of the lamination mechanism of the embodiment.

[0026] Figure 2 Schematic diagram of the lamination mechanism of the embodiment in another direction.

[0027] Figure 3 Schematic diagram of the lamination mechanism of the embodiment in yet another direction.

[0028] Figure 4 Schematic diagram of the lamination device of the embodiment.

[0029] Figure 5 Schematic diagram of the control device of the lamination device of the embodiment.

[0030] Figure 6 Schematic diagram of the control device of the lamination device of another embodiment.

[0031] In the figure:

[0032] 10. Lamination mechanism; 101. Connecting frame; 12. First driving member; 13. Second driving member; 141. Second rotating shaft; 142. Third rotating shaft; 15. Third driving member; 151. Fourth driving member; 152. Fifth driving member; 16. First clamping member; 161. First clamping piece; 162. Second clamping piece; 17. First transmission device; 171. First rotating wheel; 172. Second rotating wheel; 173. First belt; 18. Second clamping member; 181. Third clamping piece; 182. Fourth clamping piece; 19. Second transmission device; 191. Third rotating wheel; 192. Fourth rotating wheel; 193. Second belt.

[0033] 100. Lamination device; 20. Lamination platform; 30. First feeding mechanism; 31. Composite pole piece; 311. First composite pole piece; 312. Second composite pole piece; 313. Third composite pole piece; 314. Fourth composite pole piece; 315. Fifth composite pole piece; 50. Pressing mechanism; 60. Control device. Detailed implementation manners

[0034] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0035] Refer to Figures 1 to 3As shown, the lamination mechanism 10 of the embodiment of the present invention can be used for lamination of lithium-ion batteries. The lamination mechanism 10 includes a first driving member 12, a first rotating shaft, a first clamping member 16 and a second clamping member 18. The first driving member 12 is in transmission connection with the first rotating shaft. The first clamping member 16 and the second clamping member 18 are disposed at one end of the first rotating shaft. That is, the first rotating shaft connects the first clamping member 16 and the second clamping member 18. The first clamping member 16 and the second clamping member 18 are spaced apart, and the first clamping member 16 and the second clamping member 18 are respectively located on both sides of the axial direction of the first rotating shaft. That is, the first clamping member 16 and the second clamping member 18 are respectively located on both sides of the first rotating shaft. It can be understood that the first driving member 12 includes a motor. The first driving member 12 is used to drive the first rotating shaft to rotate, so that the first rotating shaft drives the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft in the clockwise direction or the counterclockwise direction. That is, the rotating first rotating shaft can drive the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft in the clockwise direction. Or, the rotating first rotating shaft can drive the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft in the counterclockwise direction.

[0036] It can be understood that the angle by which the rotating first rotating shaft drives the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft can be set according to specific circumstances. For example: the rotating first rotating shaft drives the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft by 90 degrees. Or, the rotating first rotating shaft drives the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft by 180 degrees. Or, the rotating first rotating shaft drives the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axial direction of the first rotating shaft by 360 degrees.

[0037] It can be understood that the first clamping member 16 can rotate 180 degrees counterclockwise around the axial direction of the first rotating shaft. At the same time, the second clamping member 18 can rotate 180 degrees counterclockwise around the axial direction of the first rotating shaft.

[0038] It can be understood that the first clamping member 16 can rotate 180 degrees clockwise around the axial direction of the first rotating shaft, so that the first clamping member 16 rotates from a predetermined position to another predetermined position. At the same time, the second clamping member 18 can rotate 180 degrees clockwise around the axial direction of the first rotating shaft.

[0039] In this embodiment, when the first clamping member 16 rotates counterclockwise around the axis direction of the first rotating shaft, the second clamping member 18 simultaneously rotates counterclockwise around the axis direction of the first rotating shaft. The movement trajectory of the first clamping member 16 is as shown by the dashed line x in the figure (the arrow on the dashed line x represents the movement direction), and the movement trajectory of the second clamping member 18 is as shown by the dashed line y in the figure (the arrow on the dashed line y represents the movement direction). Both the first clamping member 16 and the second clamping member 18 in the figure move counterclockwise.

[0040] It can be understood that the first clamping member 16 and the second clamping member 18 are spaced apart from each other and arranged in parallel.

[0041] Refer to Figure 4 As shown, the lamination mechanism 10 of the embodiment of the present invention can be used in the lamination device 100. The lamination device 100 includes a lamination platform 20. The lamination mechanism 10 is used to perform lamination operations on the lamination platform 20. The first clamping member 16 is used to clamp or open the electrode sheet. The second clamping member 18 is used to clamp or open the electrode sheet.

[0042] When the above-mentioned lamination mechanism 10 is used for lamination of lithium batteries, the rotating first rotating shaft can drive the first clamping member 16 that clamps the electrode sheet (one or more) to rotate clockwise or counterclockwise around the axis direction of the first rotating shaft, so that the clamped electrode sheet is folded on the lamination platform 20, and can simultaneously drive the second clamping member 18 that does not clamp the electrode sheet to rotate clockwise or counterclockwise around the axis direction of the first rotating shaft, so that the second clamping member 18 is in a position where it can clamp the next one or more electrode sheets to be laminated. In the next lamination step, in this way, the rotating first rotating shaft can drive the second clamping member 18 that clamps the next electrode sheet to rotate around the axis direction of the first rotating shaft, so that the clamped next electrode sheet is folded on the lamination platform 20, and the first clamping member 16 that does not clamp the electrode sheet can be rotated back to its original position, and so on, thereby enabling continuous lamination, improving the lamination speed, and further improving the lamination efficiency of the battery cell.

[0043] Refer to Figures 4 to 6 As shown, in this embodiment, the lamination device 100 includes a control device 60. The control device 60 is electrically connected to the first driving member 12. The control device 60 is used to control the first driving member 12 to drive the first rotating shaft to rotate, so as to drive the first clamping member 16 and the second clamping member 18 to rotate simultaneously around the axis direction of the first rotating shaft.

[0044] In other embodiments, the first clamping member 16 and the second clamping member 18 are symmetrically arranged on both sides of the axis of the first rotating shaft. The rotating first rotating shaft can drive the first clamping member 16 and the second clamping member 18 to perform circular motion simultaneously around the axis of the first rotating shaft.

[0045] Refer to Figure 1and Figure 2 As shown, the rotating first rotating shaft can drive the first clamping member 16 to rotate 180 degrees around the axis of the first rotating shaft from the first position a to the second position b, and can simultaneously drive the second clamping member 18 to rotate 180 degrees around the axis of the first rotating shaft from the second position b to the first position a.

[0046] Under the condition that the first clamping member 16 is in the second position b and the second clamping member 18 is in the first position a, the rotating first rotating shaft can also drive the first clamping member 16 to rotate 180 degrees around the axis of the first rotating shaft from the second position b to the first position a, (the movement track is as shown by the dotted line y in Figure 2 ) and can simultaneously drive the second clamping member 18 to rotate 180 degrees around the axis of the first rotating shaft from the first position a to the second position b. (The movement track is as shown by the dotted line x in Figure 2 )

[0047] When the above-mentioned lamination mechanism 10 is used for lamination of lithium batteries, the first clamping member 16 can clamp one or more pole pieces at the first position a. After the rotating first rotating shaft drives the first clamping member 16 to rotate 180 degrees around the axis of the first rotating shaft from the first position a to the second position b, the pole pieces clamped by the first clamping member 16 can be folded on the lamination platform 20 (one lamination action can be completed by rotating 180 degrees). At the same time, the second clamping member 18 can rotate from the second position b to the first position a. In this way, the second clamping member 18 can clamp the next one or more pole pieces at the first position a. In this way, after the rotating first rotating shaft drives the second clamping member 18 to rotate 180 degrees around the axis of the first rotating shaft from the first position a to the second position b, the pole pieces clamped by the second clamping member 18 can also be folded on the lamination platform 20. At the same time, the first clamping member 16 returns to the first position a again. In this way, the first clamping member 16 can clamp new pole pieces at the first position a to realize continuous lamination (cyclic lamination is carried out through the first clamping member 16 and the second clamping member 18).

[0048] In another embodiment, the first clamping member 16 rotates from the first position a to the second position b in the counterclockwise direction around the axis of the first rotating shaft, (as shown in Figure 1 and Figure 4 ) and rotates from the second position b to the first position a in the counterclockwise direction. (In Figure 2 and Figure 3 , looking outwards from the page is the counterclockwise direction) The second clamping member 18 rotates from the second position b to the first position a in the counterclockwise direction around the axis of the first rotating shaft, and rotates from the first position a to the second position b in the counterclockwise direction.

[0049] In the illustrated example, the rotating first rotating shaft can drive the first clamping member 16 to rotate 180 degrees counterclockwise around the axis of the first rotating shaft from the first position a to the second position b, and can simultaneously drive the second clamping member 18 to rotate 180 degrees counterclockwise around the axis of the first rotating shaft from the second position b to the first position a, so as to fold the pole piece clamped by the first clamping member 16 onto the lamination platform 20. Under the condition that the first clamping member 16 is in the second position b and the second clamping member 18 is in the first position a, the rotating first rotating shaft can also drive the first clamping member 16 to rotate 180 degrees counterclockwise around the axis of the first rotating shaft from the second position b to the first position a, and can simultaneously drive the second clamping member 18 clamping the pole piece to rotate 180 degrees counterclockwise around the axis of the first rotating shaft from the first position a to the second position b, so as to fold the pole piece clamped by the second clamping member 18 onto the lamination platform 20.

[0050] Specifically, the lamination mechanism 10 further includes a second driving member 13, a third driving member 15, a second rotating shaft 141 and a third rotating shaft 142. The second driving member 13 is in transmission connection with the second rotating shaft 141. The third driving member 15 is in transmission connection with the third rotating shaft 142. The second rotating shaft 141 is connected to the first rotating shaft and the first clamping member 16. The third rotating shaft 142 is connected to the first rotating shaft and the second clamping member 18. The second driving member 13 is used to drive the second rotating shaft 141 to rotate, so that the second rotating shaft 141 drives the first clamping member 16 to rotate clockwise or counterclockwise around the axis of the second rotating shaft 141. The third driving member 15 is used to drive the third rotating shaft 142 to rotate, so that the third rotating shaft 142 drives the second clamping member 18 to rotate clockwise or counterclockwise around the axis of the third rotating shaft 142.

[0051] It can be understood that both the second driving member 13 and the third driving member 15 include motors.

[0052] In this way, the first clamping member 16 can rotate around the second rotating shaft 141 to adjust the orientation of the first clamping member 16. The second clamping member 18 can rotate around the third rotating shaft 142 to adjust the orientation of the second clamping member 18.

[0053] It can be understood that both the second rotating shaft 141 and the third rotating shaft 142 are spline shafts.

[0054] In this embodiment, the control device 60 is electrically connected to the second driving member 13 and the third driving member 15. The control device 60 is used to control the second driving member 13 to drive the second rotating shaft 141 to rotate, and is used to control the third driving member 15 to drive the third rotating shaft 142 to rotate.

[0055] In one embodiment, during the process that the first clamping member 16 rotates from the first position a to the second position b around the axis direction of the first rotating shaft and the second clamping member 18 rotates from the second position b to the first position a around the axis direction of the first rotating shaft, the rotating third rotating shaft 142 can drive the second clamping member 18 to rotate clockwise or counterclockwise around the axis direction of the third rotating shaft 142. In this way, the second clamping member 18 can rotate around the third rotating shaft 142 by itself to adjust the orientation of the second clamping member 18, so as to facilitate the next operation of the second clamping member 18 (such as clamping the next one or more polar plates to be stacked). At the same time, during the process that the first clamping member 16 rotates from the second position b to the first position a around the axis direction of the first rotating shaft and the second clamping member 18 rotates from the first position a to the second position b around the axis direction of the first rotating shaft, the rotating second rotating shaft 141 can drive the first clamping member 16 to rotate clockwise or counterclockwise around the axis direction of the second rotating shaft 141. The first clamping member 16 can rotate around the second rotating shaft 141 by itself to adjust the orientation of the first clamping member 16, so as to facilitate the next operation of the first clamping member 16 (such as clamping one or more polar plates to be stacked).

[0056] Specifically, the laminating mechanism 10 further includes a first transmission device 17 and a second transmission device 19. The first transmission device 17 includes a first rotating wheel 171, a second rotating wheel 172 and a first belt 173. The first belt 173 is sleeved on the first rotating wheel 171 and the second rotating wheel 172. The first rotating wheel 171 is coaxially arranged with the output shaft of the second driving member 13. The second rotating wheel 172 is coaxially arranged with the second rotating shaft 141. The second transmission device 19 includes a third rotating wheel 191, a fourth rotating wheel 192 and a second belt 193. The second belt 193 is sleeved on the third rotating wheel 191 and the fourth rotating wheel 192. The third rotating wheel 191 is coaxially arranged with the output shaft of the third driving member 15. The fourth rotating wheel 192 is coaxially arranged with the third rotating shaft 142.

[0057] The second driving member 13 is used to drive the first rotating wheel 171 to rotate, so as to drive the second rotating wheel 172 to rotate through the first belt 173, drive the second rotating shaft 141 to rotate, and further drive the first clamping member 16 to rotate around the axis direction of the second rotating shaft 141. The third driving member 15 is used to drive the third rotating wheel 191 to rotate, so as to drive the fourth rotating wheel 192 to rotate through the second belt 193, drive the second clamping member 18 to rotate around the axis direction of the third rotating shaft 142. In this way, the structure of the transmission device is relatively simple, and the stability of the driving member transmission can be improved.

[0058] In this embodiment, the control device 60 is used to control the second driving member 13 to drive the first rotating wheel 171 to rotate, and is used to control the third driving member 15 to drive the third rotating wheel 191 to rotate.

[0059] Specifically, the laminating mechanism 10 further includes a fourth driving member 151 and a fifth driving member 152. The fourth driving member 151 is connected to the second rotating shaft 141. The fifth driving member 152 is connected to the third rotating shaft 142. The fourth driving member 151 is used to drive the second rotating shaft 141 to move back and forth along the length direction of the second rotating shaft 141, so as to drive the first clamping member 16 to move back and forth along the length direction of the second rotating shaft 141 (i.e., move back and forth in and out). The fifth driving member 152 is used to drive the third rotating shaft 142 to move back and forth along the length direction of the third rotating shaft 142 (i.e., move back and forth in and out), so as to drive the second clamping member 18 to move back and forth along the length direction of the third rotating shaft 142. It can be understood that the above driving members include motors.

[0060] It can be understood that the driving members in the above embodiments of the present invention can be controlled by the control device 60, that is, the control device 60 can control the working state of the driving members.

[0061] In this embodiment, when it is necessary for the first clamping member 16 to clamp the pole piece to be laminated, the control device 60 can be used to control the fourth driving member 151 to drive the second rotating shaft 141 to move, so as to drive the first clamping member 16 to extend to a position where it can clamp the pole piece to be laminated. Under the condition that the first clamping member 16 clamps the pole piece to be laminated, the control device 60 is used to control the fifth driving member 152 to drive the third rotating shaft 142 to move, so as to drive the second clamping member 18 to move along the length direction of the third rotating shaft 142, and retreat to a certain position in the direction away from the laminating platform 20. This can avoid the second clamping member 18 interfering with the lamination.

[0062] In the next lamination, when it is necessary for the second clamping member 18 to clamp the pole piece to be laminated, the control device 60 can be used to control the fifth driving member 152 to drive the third rotating shaft 142 to move, so as to drive the second clamping member 18 to extend to a position where it can clamp the pole piece to be laminated. Under the condition that the second clamping member 18 clamps the pole piece to be laminated, the control device 60 is used to control the fourth driving member 151 to drive the second rotating shaft 141 to move, so as to drive the first clamping member 16 to move along the length direction of the second rotating shaft 141, and retreat to a certain position in the direction away from the laminating platform 20. This can avoid the first clamping member 16 interfering with the lamination.

[0063] In another lamination, when it is necessary for the first clamping member 16 to clamp the pole piece to be laminated, the control device 60 can also control the fourth driving member 151 to drive the second rotating shaft 141 to move, so as to drive the first clamping member 16 to extend to a position where it can clamp the pole piece to be laminated. In this way, the alternating lamination can be carried out by the rotating first clamping member 16 and the second clamping member 18.

[0064] Specifically, the lamination mechanism 10 further includes a connecting frame 101. The first rotating shaft is connected to the connecting frame 101. The first clamping member 16 and the second clamping member 18 are symmetrically arranged on both sides of the connecting frame 101. The first driving member 12 is used to drive the first rotating shaft to rotate, so as to drive the connecting frame 101 to rotate, and further drive the first clamping member 16 and the second clamping member 18 to rotate simultaneously.

[0065] In this embodiment, the lamination mechanism 10 includes a frame body. The first driving member 12 is installed on the frame body. The connecting frame 101 is fixedly installed on the first rotating shaft. The arrangement of the connecting frame 101 can improve the rotation stability of the first clamping member 16 and the second clamping member 18.

[0066] Specifically, the first clamping member 16 includes a first clamping piece 161 and a second clamping piece 162. The first clamping piece 161 and the second clamping piece 162 are arranged oppositely. The first clamping member 16 can be switched between a first clamping state and a first open state. The first clamping member 16 is used to clamp the first pole piece in the first clamping state and to release the clamped first pole piece in the first open state.

[0067] Specifically, the distance between the first clamping piece 161 and the second clamping piece 162 in the first clamping state is smaller than the distance between the first clamping piece 161 and the second clamping piece 162 in the first open state. That is, when the first clamping member 16 is switched from the first clamping state to the first open state, the distance between the first clamping piece 161 and the second clamping piece 162 increases. When the first clamping member 16 is switched from the first open state to the first clamping state, the distance between the first clamping piece 161 and the second clamping piece 162 decreases. In the first clamping state, the first clamping member 16 can clamp the above-mentioned first pole piece through the first clamping piece 161 and the second clamping piece 162; in the first open state, the first clamping member 16 can release the clamped above-mentioned first pole piece.

[0068] In this embodiment, both the first clamping piece 161 and the second clamping piece 162 are L-shaped.

[0069] Specifically, the second clamping member 18 includes a third clamping piece 181 and a fourth clamping piece 182. The third clamping piece 181 and the fourth clamping piece 182 are arranged oppositely. The second clamping member 18 can be switched between a second clamping state and a second open state. The second clamping member 18 is used to clamp the second pole piece in the second clamping state and to release the clamped second pole piece in the second open state.

[0070] Specifically, the distance between the third clamping piece 181 and the fourth clamping piece 182 in the second clamping state is smaller than the distance between the third clamping piece 181 and the fourth clamping piece 182 in the second open state. That is, when the second clamping member 18 switches from the second clamping state to the second open state, the distance between the third clamping piece 181 and the fourth clamping piece 182 increases. When the second clamping member 18 switches from the second open state to the second clamping state, the distance between the third clamping piece 181 and the fourth clamping piece 182 decreases. In the second clamping state, the second clamping member 18 can clamp the second pole piece described above through the third clamping piece 181 and the fourth clamping piece 182; in the second open state, the second clamping member 18 can release the clamping of the second pole piece described above.

[0071] In the present embodiment, both the third clamping piece 181 and the fourth clamping piece 182 are L-shaped.

[0072] It can be understood that the first pole piece and the second pole piece described above can both be pole pieces to be stacked.

[0073] The clamping state and the open state of the first clamping member 16 and the second clamping member 18 can both be controlled by the control device 60.

[0074] Specifically, during the process in which the first clamping member 16 clamping the first pole piece rotates counterclockwise around the first rotating shaft and at the same time the second clamping member 18 rotates counterclockwise around the first rotating shaft (the first clamping member 16 is in the first clamping state), the second clamping member 18 is in the second clamping state or the second open state. During the process in which the first clamping member 16 not clamping the pole piece rotates counterclockwise around the first rotating shaft and at the same time the second clamping member 18 clamping the second pole piece described above rotates counterclockwise around the first rotating shaft, the second clamping member 18 is in the second clamping state, and the first clamping member 16 is in the first clamping state or the first open state.

[0075] Please refer to Figures 1 to 6 , and the structure of the stacking device 100 will be further described below.

[0076] The lamination device 100 further includes a first feeding mechanism 30 and a feeding mechanism. The first feeding mechanism 30 is used to provide a plurality of composite electrode sheets 31. Each composite electrode sheet 31 includes two separators and a first electrode sheet located between the two separators. The plurality of composite electrode sheets 31 includes a first composite electrode sheet 311, a second composite electrode sheet 312, and a third composite electrode sheet 313 that are connected in sequence. The second composite electrode sheet 312 is located between the first composite electrode sheet 311 and the third composite electrode sheet 313. The first composite electrode sheet 311 is disposed on the lamination platform 20. A second electrode sheet is disposed on the first composite electrode sheet 311. The polarity of the second electrode sheet is opposite to the polarity of the first electrode sheet. The second composite electrode sheet 312 is located on one side of the lamination platform 20. The feeding mechanism is used to convey two third electrode sheets to above and below the third composite electrode sheet 313 respectively. The polarity of each of the third electrode sheets is opposite to the polarity of the first electrode sheet.

[0077] The first clamping member 16 is used to simultaneously clamp the two third electrode sheets to clamp the two third electrode sheets and the third composite electrode sheet 313. The first driving member 12 is used to drive the first clamping member 16 to move, so as to fold the second composite electrode sheet 312 onto the second electrode sheet, and transfer the clamped two third electrode sheets and the third composite electrode sheet 313 to the lamination platform 20 to fold them onto the second composite electrode sheet 312. In this way, in one lamination operation, a total of four electrode sheets are laminated (including the second composite electrode sheet 312, one third composite electrode sheet 313, and two third electrode sheets). After the above-mentioned one lamination is completed, one of the two third electrode sheets, the third composite electrode sheet 313, the other of the two third electrode sheets, the second composite electrode sheet 312, the second electrode sheet, and the first composite electrode sheet 311 are laminated in sequence from top to bottom.

[0078] By using the lamination device 100 of the present invention, in one lamination operation, a total of four electrode sheets are laminated (including the second composite electrode sheet 312, one third composite electrode sheet 313, and two third electrode sheets), which can improve the lamination speed of the lamination device 100, and further improve the lamination efficiency of the lamination device 100.

[0079] It can be understood that when the first clamping member 16 clamps the two third electrode sheets and the third composite electrode sheet 313, the position clamped by the first clamping member 16 can be made close to the connection between the third composite electrode sheet 313 and the second composite electrode sheet 312.

[0080] In the illustrated example, two lamination mechanisms 10 are symmetrically arranged on both sides of the lamination platform 20. When laminating, among the two lamination mechanisms 10, the first clamping member 16 of one lamination mechanism 10 is used to simultaneously clamp one side of the two third polar plates, and the first clamping member 16 of the other lamination mechanism 10 is used to simultaneously clamp the other side of the two third polar plates. The two first clamping members 16 of the two lamination mechanisms 10 simultaneously rotate counterclockwise around their respective first rotation shafts to fold the second composite polar plate 312 onto the second polar plate, and transfer the two clamped third polar plates and the third composite polar plate 313 to the lamination platform 20 to be folded onto the second composite polar plate 312. This can improve the accuracy and stability of lamination.

[0081] In this embodiment, a plurality of composite polar plates 31 are connected in sequence and are in a strip shape. The first feeding mechanism 30 includes a feeding roller rotatably arranged on the bracket. The rotating feeding roller can drive the plurality of composite polar plates 31 to move towards the lamination platform 20 at a preset speed. It can be understood that the feeding roller can be driven by a motor to rotate.

[0082] Specifically, the lamination device 100 includes a second feeding mechanism. The second feeding mechanism is used to provide a plurality of third polar plates.

[0083] In some embodiments, the lamination device 100 includes a sixth driving member and a seventh driving member. The feeding mechanism includes a first feeding member and a second feeding member. The sixth driving member is connected to the first feeding member. The seventh driving member is connected to the second feeding member. The sixth driving member is used to drive the first feeding member to move to convey one of the two third polar plates to a first predetermined position above the third composite polar plate 313. The seventh driving member is used to drive the second feeding member to move to convey the other of the two third polar plates to a second predetermined position below the third composite polar plate 313.

[0084] It can be understood that both the above-mentioned sixth driving member and seventh driving member can include motors. It can be understood that both the above-mentioned first feeding member and second feeding member can include feeding manipulators. It can be understood that the second predetermined position can be set according to specific circumstances, and the second predetermined position can also be set according to specific circumstances.

[0085] Specifically, the distance between the first predetermined position and the third composite polar plate 313 is equal to the distance between the second predetermined position and the third composite polar plate 313. This facilitates clamping the polar plates by the clamping members.

[0086] In this embodiment, the first driving member 12 is used to drive the first rotating shaft to rotate, so as to drive the first clamping member 16 to rotate around the axis of the first rotating shaft, so as to fold the second composite pole piece 312 onto the second pole piece, and transfer the clamped two third pole pieces and the third composite pole piece 313 to the lamination platform 20 to be folded onto the second composite pole piece 312.

[0087] It can be understood that the rotating first rotating shaft can drive the first clamping member 16 that clamps three pole pieces (two of the third pole pieces and the third composite pole piece 313) to rotate around the axis of the first rotating shaft in the clockwise or counterclockwise direction, so that the above three pole pieces and the second composite pole piece 312 are folded onto the lamination platform 20, and can also drive the second clamping member 18 that does not clamp the pole pieces to rotate around the axis of the first rotating shaft in the clockwise or counterclockwise direction, so that the second clamping member 18 is in a position where it can clamp the next one or several pole pieces to be laminated. In the next lamination step, in this way, the rotating first rotating shaft can drive the second clamping member 18 that clamps the next one or several pole pieces (in this embodiment, three pole pieces are clamped) to rotate around the first rotating shaft, so that the clamped next one or several pole pieces are folded onto the lamination platform 20, and the first clamping member 16 that does not clamp the pole pieces can be rotated back to its original position, so that continuous lamination can be realized, the lamination speed can be increased, and thus the lamination efficiency of the battery cell can be improved.

[0088] It can be understood that when the first clamping member 16 is in the first position a, it can clamp two third pole pieces and the third composite pole piece 313. In this way, after the rotating first rotating shaft drives the first clamping member 16 to rotate 180 degrees around the center line of the first rotating shaft from the first position a to the second position b, the above three pole pieces and the second composite pole piece 312 clamped by the first clamping member 16 can be folded onto the lamination platform 20 (a lamination action can be completed by rotating 180 degrees). At the same time, the second clamping member 18 can rotate from the second position b to the first position a. In this way, when the second clamping member 18 is in the first position a, it can clamp the pole pieces to be laminated subsequently. In this way, after the rotating first rotating shaft drives the second clamping member 18 to rotate 180 degrees around the center line of the first rotating shaft from the first position a to the second position b, the pole pieces clamped by the second clamping member 18 can also be folded onto the lamination platform 20. At the same time, the first clamping member 16 returns to the first position a again. In this way, the first clamping member 16 can clamp new pole pieces in the first position a to realize continuous lamination (cyclic lamination is carried out through the first clamping member 16 and the second clamping member 18).

[0089] Further, the plurality of composite electrodes 31 includes a connected fourth composite electrode 314 and a fifth composite electrode 315. The fourth composite electrode 314 is located between the fifth composite electrode 315 and the third composite electrode 313. The feeding mechanism is configured to respectively convey two fourth electrodes above and below the fifth composite electrode 315. The polarity of each of the fourth electrodes is opposite to the polarity of the first electrode.

[0090] After the first clamping member 16 rotates 180 degrees around the first rotating shaft and the second clamping member 18 rotates 180 degrees around the first rotating shaft to fold the second composite electrode 312 onto the second electrode and transfer the clamped two third electrodes and the third composite electrode 313 onto the lamination platform 20 to fold them onto the second composite electrode 312, the second clamping member 18 can simultaneously clamp the two fourth electrodes to clamp the two fourth electrodes and the fifth composite electrode 315.

[0091] Under the condition that the second clamping member 18 simultaneously clamps the two fourth electrodes, the rotating first rotating shaft can drive the first clamping member 16 to rotate 180 degrees around the first rotating shaft and drive the second clamping member 18 to rotate 180 degrees around the first rotating shaft, so as to fold the fourth composite electrode 314 onto the third electrode and transfer and fold the clamped two fourth electrodes and the fifth composite electrode 315 onto the fourth composite electrode 314.

[0092] In this way, the first clamping member 16 and the second clamping member 18 that rotate simultaneously can perform cyclic lamination.

[0093] It can be understood that the two third electrodes and the two fourth electrodes described above can be provided by the second feeding mechanism. And the second feeding mechanism can provide a plurality of electrodes (such as positive electrodes) with the same polarity as the third electrode and the fourth electrode described above.

[0094] Further, the lamination device 100 further includes a pressing mechanism 50 that is movably provided. During the process of the first clamping member 16 rotating in the clockwise or counterclockwise direction along the axial direction of the first rotating shaft, the pressing mechanism 50 is configured to press the second electrode and the first composite electrode 311.

[0095] Specifically, the pressing mechanism 50 includes a pressing piece for pressing the second pole piece and the first composite pole piece 311. During the process that the first clamping piece 16 rotates from the first position a to the second position b around the axis of the first rotating shaft and the second clamping piece 18 rotates from the second position b to the first position a around the axis of the first rotating shaft, the pressing piece presses the second pole piece and the first composite pole piece 311. After the second composite pole piece 312 is folded onto the second pole piece and the two third pole pieces and the third composite pole piece 313 that are clamped are folded onto the second composite pole piece 312, the first clamping piece 16 can be in a state of holding and clamping the two third pole pieces and the third composite pole piece 313 to press the folded pole pieces. At this time, the control device 60 can be used to drive the pressing piece to withdraw from the position of pressing the second pole piece and the first composite pole piece 311, and after adjusting the position of the pressing piece, the pressing piece can be driven to extend to press the folded pole pieces. At this time, the control device 60 can control the first clamping piece 16 to withdraw from the position of pressing the folded pole pieces.

[0096] In addition, during the process that the first clamping piece 16 rotates from the second position b to the first position a around the first rotating shaft and the second clamping piece 18 rotates from the first position a to the second position b around the first rotating shaft, the pressing piece presses the pole pieces that have been stacked. After the second clamping piece 18 drives the pole pieces to be stacked to be folded onto the stacking platform 20, the second clamping piece 18 can also continue to press the folded pole pieces. In this way, subsequently, the pressing piece can also be withdrawn first, then the position of the pressing piece can be adjusted, and then the pressing piece can be made to press the pole pieces after stacking is completed, and then the second clamping piece 18 can be withdrawn.

[0097] That is to say, when performing cyclic stacking through the first clamping piece 16 and the second clamping piece 18, the first clamping piece 16 also has the function of pressing the folded pole pieces, and the second clamping piece 18 also has the function of pressing the folded pole pieces.

[0098] The remarkable effect of this embodiment is that by arranging the first clamping piece 16 and the second clamping piece 18 on the first rotating shaft, the rotation of the first rotating shaft drives the first clamping piece 16 and the second clamping piece 18 to move between the first position and the second position respectively to achieve the stacking operation, which has the characteristics of fast stacking speed and high working efficiency.

[0099] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A lamination device, characterized in that, It includes a lamination mechanism, a first feeding mechanism and a feeding structure. The lamination mechanism includes a first driving member, a first rotating shaft, a first clamping member and a second clamping member. The first driving member is in transmission connection with the first rotating shaft. The first clamping member and the second clamping member are arranged at one end of the first rotating shaft. The first clamping member and the second clamping member are arranged at intervals, and the first clamping member and the second clamping member are respectively located on both sides of the axis direction of the first rotating shaft. The first driving member is used to drive the first rotating shaft to rotate, so that the first rotating shaft drives the first clamping member and the second clamping member to rotate simultaneously around the axis direction of the first rotating shaft in the clockwise direction or the counterclockwise direction; The first clamping member and the second clamping member are symmetrically arranged on both sides of the axis of the first rotating shaft. The first rotating shaft can drive the first clamping member and the second clamping member to rotate 180 degrees simultaneously around the axis direction of the first rotating shaft, so that the first clamping member rotates from the first position to the second position, and the second clamping member rotates from the second position to the first position; Alternatively, the first rotating shaft can drive the first clamping member and the second clamping member to rotate 180 degrees simultaneously around the axis direction of the first rotating shaft, so that the first clamping member rotates from the second position to the first position, and the second clamping member rotates from the first position to the second position; The lamination mechanism further includes a second driving member, a third driving member, a second rotating shaft and a third rotating shaft arranged on the first rotating shaft. The second driving member is in transmission connection with the second rotating shaft. The first clamping member is connected to the second rotating shaft. The second driving member is used to drive the second rotating shaft to rotate, so that the second rotating shaft drives the first clamping member to rotate around the axis direction of the second rotating shaft in the clockwise direction or the counterclockwise direction; The third driving member is in transmission connection with the third rotating shaft. The second clamping member is connected to the third rotating shaft. The third driving member is used to drive the third rotating shaft to rotate, so that the third rotating shaft drives the second clamping member to rotate around the axis direction of the third rotating shaft in the clockwise direction or the counterclockwise direction; The lamination mechanism further includes a fourth driving member and a fifth driving member. The fourth driving member is connected to the second rotating shaft. The fourth driving member is used to drive the second rotating shaft to move along the length direction of the second rotating shaft, so as to drive the first clamping member to move along the length direction of the second rotating shaft; The fifth driving member is connected to the third rotating shaft. The fifth driving member is used to drive the third rotating shaft to move along the length direction of the third rotating shaft, so as to drive the second clamping member to move along the length direction of the third rotating shaft; The first feeding mechanism is used to provide a plurality of composite electrode sheets. Each composite electrode sheet includes two separators and a first electrode sheet located between the two separators. The plurality of composite electrode sheets include a first composite electrode sheet, a second composite electrode sheet, and a third composite electrode sheet connected in sequence. The second composite electrode sheet is located between the first composite electrode sheet and the third composite electrode sheet. The first composite electrode sheet is disposed on the lamination platform, and a second electrode sheet is disposed on the first composite electrode sheet. The polarity of the second electrode sheet is opposite to the polarity of the first electrode sheet. The second composite electrode sheet is located on one side of the lamination platform. The feeding mechanism is used to convey two third electrode sheets above and below the third composite electrode sheet respectively. The polarity of each third electrode sheet is opposite to the polarity of the first electrode sheet; The first clamping member is used to clamp the two third electrode sheets simultaneously to clamp the two third electrode sheets and the third composite electrode sheet. The first driving member is used to drive the first clamping member to move, so as to fold the second composite electrode sheet onto the second electrode sheet, and transfer the clamped two third electrode sheets and the third composite electrode sheet to the lamination platform to fold them onto the second composite electrode sheet. In this way, in one lamination operation, the lamination of a total of four electrode sheets is completed, including the second composite electrode sheet, one third composite electrode sheet, and two third electrode sheets.

2. The lamination device according to claim 1, characterized in that, The first clamping member rotates counterclockwise from the first position to the second position around the axis of the first rotating shaft, and rotates counterclockwise from the second position to the first position around the axis of the first rotating shaft; The second clamping member rotates counterclockwise from the second position to the first position around the axis of the first rotating shaft, and rotates counterclockwise from the first position to the second position around the axis of the first rotating shaft.

3. The lamination device according to claim 1, characterized in that, When the second clamping member rotates from the second position to the first position around the axis of the first rotating shaft, the third rotating shaft can drive the second clamping member to rotate around the axis of the third rotating shaft; When the first clamping member rotates from the second position to the first position around the axis of the first rotating shaft, the second rotating shaft can drive the first clamping member to rotate around the axis of the second rotating shaft.

4. The lamination device according to claim 1, wherein The lamination mechanism further includes a first transmission device and a second transmission device. The first transmission device includes a first rotating wheel, a second rotating wheel, and a first belt. The first belt is sleeved on the first rotating wheel and the second rotating wheel. The first rotating wheel is coaxially arranged with the output shaft of the second driving member, and the second rotating wheel is connected to the second rotating shaft. The second transmission device includes a third rotating wheel, a fourth rotating wheel, and a second belt. The second belt is sleeved on the third rotating wheel and the fourth rotating wheel. The third rotating wheel is coaxially arranged with the output shaft of the third driving member, and the fourth rotating wheel is connected to the third rotating shaft; The second driving member is used to drive the first rotating wheel to rotate, so as to drive the second rotating wheel to rotate through the first belt, and further drive the second rotating shaft to rotate; The third driving member is used to drive the third rotating wheel to rotate, so as to drive the fourth rotating wheel to rotate through the second belt, and further drive the third rotating shaft to rotate.

5. The lamination device according to claim 1, characterized in that, The lamination mechanism further includes a connecting frame, the first rotating shaft is connected to the connecting frame, the first clamping member and the second clamping member are symmetrically arranged on both sides of the connecting frame, and when the first driving member drives the first rotating shaft to rotate, the first rotating shaft drives the connecting frame to rotate.

6. The laminating device according to claim 1, characterized in that, The first clamping member includes a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged oppositely, the first clamping member can be switched between a first clamping state and a first open state, and the first clamping member is used to clamp the first pole piece in the first clamping state and release the first pole piece in the first open state; The second clamping member includes a third clamping piece and a fourth clamping piece, the third clamping piece and the fourth clamping piece are arranged oppositely, the second clamping member can be switched between a second clamping state and a second open state, and the second clamping member is used to clamp the second pole piece in the second clamping state and release the second pole piece in the second open state.

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