A laminating device and a laminating method

Abstract

The present invention provides a lamination device and a lamination method. The second composite pole piece provided by the feeding mechanism of the lamination device is located between the first composite pole piece and the third composite pole piece. The first composite pole piece is arranged on the lamination platform, and a second pole piece is arranged on the first composite pole piece. The polarity of the second pole piece is opposite to that of the first pole piece. The second composite pole piece is located on one side of the lamination platform. The feeding mechanism is used to convey two third pole pieces above and below the third composite pole piece respectively. The polarity of each third pole piece is opposite to that of the first pole piece. The first clamping member of the first lamination mechanism is used to clamp the two third pole pieces simultaneously to clamp the two third pole pieces and the third composite pole piece. The first driving member is used to drive the first clamping member to move so as to fold the second composite pole piece onto the second pole piece and transfer the clamped two third pole pieces and the third composite pole piece onto the lamination platform to fold them onto the second composite pole piece. The lamination method can be implemented by the above lamination device.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery laminating, and particularly to a laminating device and a laminating method. Background Art

[0002] The battery processing and manufacturing processes in the related art 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 cumbersome process and needs to be improved. For example, the Z-type laminating method is commonly used in the laminating process, which basically stacks negative electrode sheets, separator membranes, and positive electrode sheets 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 loaded onto the laminating platform in sequence, the laminating speed is slow, thereby affecting the laminating efficiency of the battery cell. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a laminating device and a laminating method with high laminating efficiency.

[0004] The laminating device of the embodiment of the present invention is used for laminating lithium-ion batteries. The laminating device includes a laminating platform, a feeding mechanism, a conveying mechanism, and a first laminating mechanism. The feeding mechanism is used to provide a plurality of composite electrode sheets. Each composite electrode sheet includes two separator membranes and a first electrode sheet located between the two separator membranes. The plurality of composite electrode sheets include a connected first composite electrode sheet, a second composite electrode sheet, and a third composite electrode sheet. 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 arranged on the laminating platform, and a second electrode sheet is arranged on the first composite electrode sheet. The polarity of the second electrode sheet is opposite to that of the first electrode sheet. The second composite electrode sheet is located on one side of the laminating platform. The conveying mechanism is used to convey two third electrode sheets to the upper and lower sides of the third composite electrode sheet respectively. The polarity of each third electrode sheet is opposite to that of the first electrode sheet. The first laminating mechanism includes a first driving member and a movable first clamping member. 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 laminating platform to fold them onto the second composite electrode sheet.

[0005] In some embodiments, the laminating device includes a second driving member and a third driving member, the feeding mechanism includes a first feeding member and a second feeding member, the second driving member is connected to the first feeding member, and the third driving member is connected to the second feeding member. The second driving member is configured to drive the first feeding member to move so as to convey one of the two third polar plates to a first predetermined position above the third composite polar plate, and the third driving member is configured to drive the second feeding member to move so as to convey the other of the two third polar plates to a second predetermined position below the third composite polar plate.

[0006] In some embodiments, the first laminating mechanism includes a first rotating shaft, the first driving member is in transmission connection with the first rotating shaft, the first rotating shaft is connected to the first clamping member, and the first driving member is configured to drive the first rotating shaft to rotate so as to drive the first clamping member to rotate around the first rotating shaft, so as to fold the second composite polar plate onto the second polar plate, and transfer the two clamped third polar plates and the third composite polar plate to the laminating platform to be folded onto the second composite polar plate.

[0007] In some embodiments, the first laminating mechanism includes a second clamping member, the first clamping member and the second clamping member are arranged at intervals, the first clamping member and the second clamping member are respectively located on both sides of the first rotating shaft, and the first rotating shaft is connected to the first clamping member and the second clamping member. The first driving member is configured to drive the first rotating shaft to rotate, so as to drive the first clamping member and the second clamping member to rotate around the first rotating shaft simultaneously in the clockwise direction or the counterclockwise direction.

[0008] In some embodiments, the first clamping member and the second clamping member are symmetrically arranged on both sides of the center line of the first rotating shaft. The rotating first rotating shaft can drive the first clamping member and the second clamping member to perform circular motion around the center line of the first rotating shaft simultaneously. The rotating first rotating shaft can drive the first clamping member to rotate 180 degrees around the center line of the first rotating shaft from the first position to the second position to fold the second composite pole piece onto the second pole piece, and transfer the two clamped third pole pieces and the third composite pole piece to the lamination platform to be folded onto the second composite pole piece, and can simultaneously drive the second clamping member to rotate 180 degrees around the center line of the first rotating shaft from the second position to the first position. Under the condition that the first clamping member is in the second position and the second clamping member is in the first position, the rotating first rotating shaft can also drive the first clamping member to rotate 180 degrees around the center line of the first rotating shaft from the second position to the first position, and can simultaneously drive the second clamping member to rotate 180 degrees around the center line of the first rotating shaft from the first position to the second position.

[0009] In some embodiments, the plurality of composite pole pieces include a connected fourth composite pole piece and a fifth composite pole piece. The fourth composite pole piece is located between the fifth composite pole piece and the third composite pole piece. The feeding mechanism is used to respectively convey two fourth pole pieces above and below the fifth composite pole piece. The polarity of each fourth pole piece is opposite to the polarity of the first pole piece. After the first clamping member rotates 180 degrees around the first rotating shaft and the second clamping member rotates 180 degrees around the first rotating shaft to fold the second composite pole piece onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece to the lamination platform to be folded onto the second composite pole piece, the second clamping member can simultaneously clamp the two fourth pole pieces to clamp the two fourth pole pieces and the fifth composite pole piece. Under the condition that the second clamping member simultaneously clamps the two fourth pole pieces, the rotating first rotating shaft can drive the first clamping member to rotate 180 degrees around the first rotating shaft, and drive the second clamping member to rotate 180 degrees around the first rotating shaft, so as to fold the fourth composite pole piece onto the third pole piece, and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece onto the fourth composite pole piece.

[0010] In some embodiments, the first laminating mechanism includes a fourth driving member, a fifth driving member, a second rotating shaft, and a third rotating shaft. The fourth driving member is connected to the second rotating shaft, the second rotating shaft is connected to the first rotating shaft and the first clamping member, the fifth driving member is connected to the third rotating shaft, and the third rotating shaft is connected to the first rotating shaft and the second clamping member. The fourth driving member is configured to drive the second rotating shaft to rotate, so as to drive the first clamping member to rotate around the second rotating shaft in a counterclockwise or clockwise direction, and the fifth driving member is configured to drive the third rotating shaft to rotate, so as to drive the second clamping member to rotate around the third rotating shaft in a counterclockwise or clockwise direction.

[0011] In some embodiments, during the process that the first clamping member rotates around the first rotating shaft and the second clamping member rotates around the first rotating shaft to fold the second composite pole piece onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece to the laminating platform to be folded onto the second composite pole piece, the rotating third rotating shaft can drive the second clamping member to rotate around the center line of the third rotating shaft in a counterclockwise or clockwise direction.

[0012] In some embodiments, the first laminating mechanism includes a sixth driving member and a seventh driving member. The sixth driving member is connected to the second rotating shaft, and the seventh driving member is connected to the third rotating shaft. The sixth driving member is configured to drive the second rotating shaft to move back and forth along the length direction of the second rotating shaft, so as to drive the first clamping member to move back and forth along the length direction of the second rotating shaft, and the seventh driving member is configured to drive the third rotating shaft to move back and forth along the length direction of the third rotating shaft, so as to drive the second clamping member to move back and forth along the length direction of the third rotating shaft.

[0013] In some embodiments, the laminating device includes a second laminating mechanism. The first laminating mechanism and the second laminating mechanism are arranged at intervals. The second laminating mechanism includes a third clamping member and a rotatable fourth rotating shaft. The third clamping member is connected to the fourth rotating shaft. The first clamping member and the third clamping member are arranged at intervals and opposite to each other. The first rotating shaft and the fourth rotating shaft are arranged at intervals. The first clamping member is configured to simultaneously clamp one side of two third pole pieces, and the third clamping member is configured to simultaneously clamp the other side of two third pole pieces. Under the condition that the first clamping member rotates around the first rotating shaft, the rotating fourth rotating shaft can simultaneously drive the third clamping member to rotate around the fourth rotating shaft, so as to fold the second composite pole piece onto the second pole piece, and transfer the two clamped third pole pieces and the third composite pole piece to the laminating platform to be folded onto the second composite pole piece.

[0014] In some embodiments, the laminating device includes a control device. The second laminating mechanism includes an eighth driving member and a fourth clamping member. The control device is electrically connected to the first driving member and the eighth driving member. The eighth driving member is connected to the fourth rotating shaft. The fourth rotating shaft is connected to the third clamping member and the fourth clamping member. The third clamping member and the fourth clamping member are respectively located on both sides of the fourth rotating shaft. The control device is configured to control the first driving member to drive the first rotating shaft to rotate, so as to drive the first clamping member and the second clamping member to simultaneously rotate counterclockwise around the first rotating shaft, and is configured to control the eighth driving member to drive the fourth rotating shaft to rotate under the condition that the first clamping member and the second clamping member simultaneously rotate counterclockwise around the first rotating shaft, so as to drive the third clamping member and the fourth clamping member to simultaneously rotate counterclockwise around the fourth rotating shaft.

[0015] In some embodiments, the laminating device includes a movable pressing mechanism. During the process of the first clamping member rotating around the first rotating shaft, the pressing mechanism is configured to press the second pole piece and the first composite pole piece.

[0016] In some embodiments, 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 distance between the first clamping piece and the second clamping piece in the first clamping state is less than the distance between the first clamping piece and the second clamping piece in the first open state. In the first clamping state, the first clamping member can simultaneously clamp two of the third pole pieces, so as to clamp the two third pole pieces and the third composite pole piece.

[0017] The laminating method according to the embodiments of the present invention is used for laminating lithium-ion batteries. The laminating method includes:

[0018] Providing a plurality of composite pole pieces, each composite pole piece including two separators and a first pole piece located between the two separators. The plurality of composite pole pieces include a connected first composite pole piece, a second composite pole piece, and a third composite pole piece. The second composite pole piece is located between the first composite pole piece and the third composite pole piece;

[0019] Providing a second pole piece, the polarity of the second pole piece being opposite to the polarity of the first pole piece;

[0020] Placing the first composite pole piece on the laminating platform, and placing the second pole piece on the first composite pole piece. The second composite pole piece is located on one side of the laminating platform;

[0021] Providing two third pole pieces, the polarity of the third pole piece being opposite to the polarity of the first pole piece;

[0022] Feed the two third pole pieces to the upper and lower sides of the third composite pole piece respectively, and clamp the two third pole pieces to clamp the two third pole pieces and the third composite pole piece.

[0023] Transfer the clamped two third pole pieces and the third composite pole piece to the lamination platform, so as to fold the second composite pole piece onto the second pole piece, and transfer the clamped two third pole pieces and the third composite pole piece to the lamination platform to fold onto the second composite pole piece.

[0024] The lamination method according to the embodiment of the present invention can be implemented by the lamination device of the above embodiments. In one lamination operation, a total of four pole pieces are laminated (including the second composite pole piece, one third composite pole piece and two third pole pieces), which can improve the lamination speed of the lamination device, and then improve the lamination efficiency of the lamination device.

[0025] Additional aspects and advantages of the embodiments of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, the other embodiment drawings obtained should be included in the technical solutions of the present invention.

[0027] Figure 1 is a three-dimensional schematic diagram of the lamination device according to the embodiment of the present invention;

[0028] Figure 2 is a three-dimensional schematic diagram of the first lamination mechanism of the lamination device according to the embodiment of the present invention;

[0029] Figure 3 is another three-dimensional schematic diagram of the first lamination mechanism of the lamination device according to the embodiment of the present invention;

[0030] Figure 4 is yet another three-dimensional schematic diagram of the first lamination mechanism of the lamination device according to the embodiment of the present invention;

[0031] Figure 5 is a module schematic diagram of the lamination device according to the embodiment of the present invention;

[0032] Figure 6 is another module schematic diagram of the lamination device according to the embodiment of the present invention.

[0033] In the figure:

[0034] 100. Laminating device;

[0035] 10. First laminating mechanism;

[0036] 101. Connecting frame; 12. First driving member; 13. Fourth driving member; 14. First rotating shaft; 141. Second rotating shaft; 142. Third rotating shaft; 15. Fifth driving member; 151. Sixth driving member; 152. Seventh 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;

[0037] 20. Laminating platform;

[0038] 30. First feeding mechanism; 31. Composite electrode sheet; 311. First composite electrode sheet; 312. Second composite electrode sheet; 313. Third composite electrode sheet; 314. Fourth composite electrode sheet; 315. Fifth composite electrode sheet;

[0039] 60. Control device;

[0040] 70. Second laminating mechanism; 71. Third clamping member; 72. Fourth rotating shaft; 73. Eighth driving member; 74. Fourth clamping member;

[0041] 80. Pressing mechanism. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only one embodiment of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Please refer to Figures 1 to 6 , the laminating method of the present invention is used for laminating lithium-ion batteries and can be used for the laminating device 100. The above laminating method includes:

[0044] Providing 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 includes connected first composite electrode sheet 311, second composite electrode sheet 312 and third composite electrode sheet 313, and the second composite electrode sheet 312 is located between the first composite electrode sheet 311 and the third composite electrode sheet 313;

[0045] Provide a second pole piece, the polarity of the second pole piece being opposite to the polarity of the first pole piece;

[0046] Place the first composite pole piece 311 on the lamination platform 20, and place the second pole piece on the first composite pole piece 311, with the second composite pole piece 312 located on one side of the lamination platform 20;

[0047] Provide two third pole pieces, the polarity of the third pole piece being opposite to the polarity of the first pole piece;

[0048] Transport the two third pole pieces to above and below the third composite pole piece 313 respectively, and clamp the two third pole pieces to clamp the two third pole pieces and the third composite pole piece 313;

[0049] Transfer the clamped two third pole pieces and the third composite pole piece 313 towards the lamination platform 20 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 fold them onto the second composite pole piece 312.

[0050] It can be understood that multiple composite pole pieces can be connected into a strip. The above-mentioned first pole piece can be a positive pole piece or a negative pole piece. The above-mentioned second pole piece and third pole piece can be negative pole pieces or positive pole pieces. It can be understood that the composite pole piece can be formed by a thermal composite method. In some examples, the first pole piece is a negative pole piece, the second pole piece is a positive pole piece, and the third pole piece is a positive pole piece.

[0051] It can be understood that before folding the clamped two third pole pieces and the third composite pole piece 313, the second pole piece and the position of the first composite pole piece 311 can be fixed by pressing the pole piece. And during one lamination, the second composite pole piece 312 can be driven to rotate around the connection line between the second composite pole piece 312 and the first composite pole piece 311 and fold onto the second pole piece.

[0052] In this embodiment, the sizes of the respective composite pole pieces are substantially the same, and the first composite pole piece 311, the second composite pole piece 312, and the third composite pole piece 313 are connected in sequence.

[0053] The lamination method of the present invention can be implemented by a lamination device 100. The lamination device 100 includes a lamination platform 20, a first feeding mechanism 30, a feeding mechanism (not shown in the figure), and a first lamination mechanism 10 (please refer to Figures 1 to 4 ).

[0054] The lamination platform 20 is used for performing lamination operations on the lamination platform 20. 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 connected first composite electrode sheet 311, a second composite electrode sheet 312, and a third composite electrode sheet 313. 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 respectively convey two third electrode sheets above and below the third composite electrode sheet 313. The polarity of each of the third electrode sheets is opposite to the polarity of the first electrode sheet.

[0055] The first lamination mechanism 10 includes a first driving member 12 and a movable first clamping member 16. 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 onto 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 stacked in sequence from top to bottom.

[0056] In summary, 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 then improve the lamination efficiency of the lamination device 100.

[0057] In this embodiment, the plurality of composite electrode sheets 31 are connected in sequence and are in a strip shape. The first feeding mechanism 30 includes a feeding roller rotatably disposed on the bracket. The rotating feeding roller can drive the plurality of composite electrode sheets 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.

[0058] In some embodiments, the lamination device 100 includes a second feeding mechanism. The second feeding mechanism is used to provide a plurality of third electrode sheets.

[0059] In some embodiments, the laminating device 100 includes a second driving member and a third driving member. The feeding mechanism includes a first feeding member and a second feeding member. The second driving member is connected to the first feeding member. The third driving member is connected to the second feeding member. The second driving member is configured to drive the first feeding member to move so as to convey one of the two third pole pieces to a first predetermined position above the third composite pole piece 313. The third driving member is configured to drive the second feeding member to move so as to convey the other of the two third pole pieces to a second predetermined position below the third composite pole piece 313.

[0060] It can be understood that both the above-mentioned second driving member and third driving member may include motors. It can be understood that both the above-mentioned first feeding member and second feeding member may include feeding manipulators. It can be understood that the first predetermined position can be set according to specific circumstances, and the second predetermined position can also be set according to specific circumstances.

[0061] In some embodiments, the distance between the first predetermined position and the third composite pole piece 313 is equal to the distance between the second predetermined position and the third composite pole piece 313. This facilitates clamping the pole pieces by the clamping member.

[0062] In some embodiments, the first laminating mechanism 10 includes a first rotating shaft 14. The first rotating shaft 14 is connected to the first driving member 12. The first rotating shaft 14 is connected to the first clamping member 16. The first driving member 12 is configured to drive the first rotating shaft 14 to rotate so as to drive the first clamping member 16 to rotate around the first rotating shaft 14, 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 laminating platform 20 to fold them onto the second composite pole piece 312.

[0063] It can be understood that the first rotating shaft 14 that can be set to rotate drives the first clamping member 16 to rotate around the first rotating shaft 14 by a preset angle, 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 laminating platform 20 to fold them onto the second composite pole piece 312. It can be understood that the above-mentioned preset angle can be 90 degrees, 180 degrees, 270 degrees or 360 degrees, etc.

[0064] In some embodiments, the first laminating mechanism 10 includes a second clamping member 18. The first clamping member 16 and the second clamping member 18 are spaced apart. The first clamping member 16 and the second clamping member 18 are respectively located on both sides of the first rotating shaft 14. The first rotating shaft 14 is connected to the first clamping member 16 and the second clamping member 18. The first driving member 12 is configured to drive the first rotating shaft 14 to rotate, so as to drive the first clamping member 16 and the second clamping member 18 to rotate around the first rotating shaft 14 simultaneously in the clockwise or counterclockwise direction.

[0065] That is, the rotating first rotating shaft 14 can drive the first clamping member 16 and the second clamping member 18 to rotate clockwise around the first rotating shaft 14 simultaneously. Or, the rotating first rotating shaft 14 can drive the first clamping member 16 and the second clamping member 18 to rotate counterclockwise around the first rotating shaft 14 simultaneously.

[0066] It can be understood that the first clamping member 16 can rotate 180 degrees around the first rotating shaft 14. Meanwhile, the second clamping member 18 can rotate 180 degrees around the first rotating shaft 14.

[0067] It can be understood that the first clamping member 16 can rotate 180 degrees counterclockwise around the first rotating shaft 14. Meanwhile, the second clamping member 18 can rotate 180 degrees counterclockwise around the first rotating shaft 14.

[0068] In this embodiment, when the first clamping member 16 rotates counterclockwise around the first rotating shaft 14, the second clamping member 18 rotates counterclockwise around the first rotating shaft 14 simultaneously. The movement locus of the first clamping member 16 is as Figure 1 and Figure 2 shown by the dashed line x (the arrow on the dashed line x represents the movement direction) in, and the movement locus of the second clamping member 18 is as Figure 1 and Figure 2 shown by the dashed line y in (the arrow on the dashed line y represents the movement direction). In the illustration, both the first clamping member 16 and the second clamping member 18 move counterclockwise.

[0069] In the illustrated example, the rotating first rotating shaft 14 drives the first clamping member 16 to move counterclockwise around the first rotating shaft 14, and simultaneously drives the second clamping member 18 to move counterclockwise around the first rotating shaft 14, so as to fold the second composite pole piece 312 onto the second pole piece, and transfer the two clamped 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.

[0070] It can be understood that the first clamping member 16 and the second clamping member 18 can be arranged in parallel and spaced apart. The rotating first rotating shaft 14 can drive the first clamping member 16 clamping three pole pieces (the two third pole pieces and the third composite pole piece 313) to rotate counterclockwise or clockwise around the first rotating shaft 14, so that the three pole pieces and the second composite pole piece 312 are folded on the lamination platform 20, and can simultaneously drive the second clamping member 18 not clamping the pole piece to rotate counterclockwise or clockwise around the first rotating shaft 14, so that the second clamping member 18 is in a position to clamp the next one or several pole pieces to be laminated. In the next stacking step, the rotating first shaft 14 can drive the second clamping member 18 clamping the next one or several pole sheets (three pole sheets are clamped in this embodiment) to rotate around the first shaft 14, so that the clamped next one or several pole sheets are folded on the stacking platform 20, and the first clamping member 16 that does not clamp the pole sheet can be rotated back to its original position, thereby realizing continuous stacking, increasing the stacking speed, and further improving the stacking efficiency of the battery cell.

[0071] In some embodiments, 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 14 to rotate, so as to drive the first clamping member 16 and the second clamping member 18 to rotate around the first rotating shaft 14 at the same time.

[0072] In some embodiments, the first clamping member 16 and the second clamping member 18 are symmetrically disposed on both sides of the center line of the first rotating shaft 14. The rotating first rotating shaft 14 can drive the first clamping member 16 and the second clamping member 18 to perform circular motion around the center line of the first rotating shaft 14 at the same time.

[0073] The rotating first rotating shaft 14 can drive the first clamping member 16 to rotate 180 degrees around the center line of the first rotating shaft 14 to rotate from the first position a to the second position b (eg Figure 1 and Figure 2 As shown, the motion trajectory is shown by the dotted line x in the figure) to fold the second composite electrode sheet 312 on 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 on the second composite electrode sheet 312, and can simultaneously drive the second clamping member 18 to rotate 180 degrees around the center line of the first rotating shaft 14 to rotate from the second position b to the first position a (the motion trajectory is shown in Figure 1 and Figure 2 y in the figure).

[0074] 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 14 can also drive the first clamping member 16 to rotate 180 degrees around the center line of the first rotating shaft 14 from the second position b to the first position a (the movement track is as shown by the dotted line y in Figure 3 ), and can simultaneously drive the second clamping member 18 to rotate 180 degrees around the center line of the first rotating shaft 14 from the first position a to the second position b (the movement track is as shown by the dotted line x in Figure 3 ). In the illustration, the first position a and the second position b are basically on the same horizontal plane.

[0075] It can be understood that when the first clamping member 16 is in the first position a, it can clamp the two third pole pieces and the third composite pole piece 313. Thus, after the rotating first rotating shaft 14 drives the first clamping member 16 to rotate 180 degrees upward around the center line of the first rotating shaft 14 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 on 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 14 drives the second clamping member 18 to rotate 180 degrees upward around the center line of the first rotating shaft 14 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 in the first position a to achieve continuous lamination (reciprocal lamination is performed through the first clamping member 16 and the second clamping member 18).

[0076] In some embodiments, the first clamping member 16 rotates from the first position a to the second position b around the center line of the first rotating shaft 14 in the counterclockwise direction (as shown in Figure 1 ), and rotates from the second position b to the first position a in the counterclockwise direction (as shown in Figure 3 , Figure 3 and Figure 4 where looking out from the page is in the counterclockwise direction). The second clamping member 18 rotates from the second position b to the first position a around the center line of the first rotating shaft 14 in the counterclockwise direction, and rotates from the first position a to the second position b in the counterclockwise direction.

[0077] In the illustrated example, the rotating first rotating shaft 14 can drive the first clamping member 16 to rotate 180 degrees counterclockwise around the center line of the first rotating shaft 14 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 center line of the first rotating shaft 14 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 14 can also drive the first clamping member 16 to rotate 180 degrees counterclockwise around the center line of the first rotating shaft 14 from the second position b to the first position a, and can simultaneously drive the second clamping member 18 that clamps the pole piece to rotate 180 degrees counterclockwise around the center line of the first rotating shaft 14 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.

[0078] In some embodiments, the plurality of composite pole pieces 31 include a connected fourth composite pole piece 314 and a fifth composite pole piece 315. The fourth composite pole piece 314 is located between the fifth composite pole piece 315 and the third composite pole piece 313. The feeding mechanism is used to respectively convey two fourth pole pieces above and below the fifth composite pole piece 315. The polarity of each of the fourth pole pieces is opposite to the polarity of the first pole piece.

[0079] After the first clamping member 16 rotates 180 degrees around the first rotating shaft 14 and the second clamping member 18 rotates 180 degrees around the first rotating shaft 14 to fold the second composite pole piece 312 onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece 313 onto the lamination platform 20 to fold them onto the second composite pole piece 312, the second clamping member 18 can simultaneously clamp the two fourth pole pieces to clamp the two fourth pole pieces and the fifth composite pole piece 315.

[0080] Under the condition that the second clamping member 18 simultaneously clamps the two fourth pole pieces, the rotating first rotating shaft 14 can drive the first clamping member 16 to rotate 180 degrees around the first rotating shaft 14 and drive the second clamping member 18 to rotate 180 degrees around the first rotating shaft 14, so as to fold the fourth composite pole piece 314 onto the third pole piece and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece 315 onto the fourth composite pole piece 314.

[0081] It should be noted that after the first clamping member 16 and the second clamping member 18 rotate counterclockwise simultaneously around the first rotating shaft 14 to fold the second composite pole piece 312 onto the second pole piece and transfer the two clamped 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, the rotating first rotating shaft 14 can continue to drive the first clamping member 16 and the second clamping member 18 to rotate counterclockwise simultaneously around the first rotating shaft 14 to fold the fourth composite pole piece 314 onto the third pole piece, and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece 315 onto the fourth composite pole piece 314. In this way, cyclic lamination can be performed by the first clamping member 16 and the second clamping member 18 rotating simultaneously.

[0082] It can be understood that the two above-mentioned third pole pieces and the two fourth pole pieces can be provided by the above-mentioned second feeding mechanism. And the second feeding mechanism can provide multiple pole pieces (such as positive pole pieces) with the same polarity as the above-mentioned third pole pieces and fourth pole pieces.

[0083] In this embodiment, the control device 60 is used to control the first driving member 12 to drive the first rotating shaft 14 to rotate under the condition that the second clamping member 18 clamps the two fourth pole pieces simultaneously, so as to drive the first clamping member 16 to rotate 180 degrees around the first rotating shaft 14 from the second position b to the first position a, and drive the second clamping member 18 to rotate 180 degrees around the first rotating shaft 14 from the first position a to the second position b, so as to fold the fourth composite pole piece 314 onto the third pole piece, and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece 315 onto the fourth composite pole piece 314.

[0084] In some embodiments, the first lamination mechanism 10 includes a fourth driving member 13, a fifth driving member 15, a second rotating shaft 141 and a third rotating shaft 142. The fourth driving member 13 is connected to the second rotating shaft 141. The second rotating shaft 141 is connected to the first rotating shaft 14 and the first clamping member 16. The fifth driving member 15 is connected to the third rotating shaft 142. The third rotating shaft 142 is connected to the first rotating shaft 14 and the second clamping member 18. The fourth driving member 13 is used to drive the second rotating shaft 141 to rotate, so as to drive the first clamping member 16 to rotate around the second rotating shaft 141 in the counterclockwise or clockwise direction. The fifth driving member 15 is used to drive the third rotating shaft 142 to rotate, so as to drive the second clamping member 18 to rotate around the third rotating shaft 142 in the counterclockwise or clockwise direction.

[0085] It can be understood that the fourth driving member 13 can include a motor. The fifth driving member 15 can include a motor. In this way, the first clamping member 16 can rotate around the second rotating shaft 141 for self-rotation to adjust the orientation of the first clamping member 16. The second clamping member 18 can rotate around the third rotating shaft 142 for self-rotation to adjust the orientation of the second clamping member 18.

[0086] It can be understood that both the second rotating shaft 141 and the third rotating shaft 142 can be spline shafts.

[0087] In this embodiment, the control device 60 is electrically connected to the fourth driving member 13 and the fifth driving member 15. The control device 60 is used to control the fourth driving member 13 to drive the second rotating shaft 141 to rotate, and is used to control the fifth driving member 15 to drive the third rotating shaft 142 to rotate.

[0088] In some embodiments, during the process that the first clamping member 16 rotates around the first rotating shaft 14 and the second clamping member 18 rotates around the first rotating shaft 14 to fold the second composite pole piece 312 onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece 313 to the lamination platform 20 to fold them onto the second composite pole piece 312, the rotating third rotating shaft 142 can drive the second clamping member 18 to rotate around the center line of the third rotating shaft 142 in the counterclockwise or clockwise direction. In this way, the second clamping member 18 can rotate around the third rotating shaft 142 for self-rotation 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 pole piece to be laminated).

[0089] In some embodiments, during the process that the first clamping member 16 rotates around the first rotating shaft 14 and the second clamping member 18 rotates around the first rotating shaft 14 to fold the fourth composite pole piece 314 onto the third pole piece and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece 315 onto the fourth composite pole piece 314, the rotating second rotating shaft 141 can drive the first clamping member 16 to rotate around the center line of the second rotating shaft 141 in the counterclockwise or clockwise direction. The first clamping member 16 can rotate around the second rotating shaft 141 for self-rotation 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 the pole piece to be laminated).

[0090] In this embodiment, the control device 60 is electrically connected to the fourth driving member 13 and the fifth driving member 15. Under the condition that the first clamping member 16 rotates around the center line of the first rotating shaft 14 from the first position a to the second position b and the second clamping member 18 rotates around the center line of the first rotating shaft 14 from the second position b to the first position a, the control device 60 is used to control the fifth driving member 15 to drive the third rotating shaft 142 to rotate, so as to drive the second clamping member 18 to rotate around the center line of the third rotating shaft 142. Under the condition that the first clamping member 16 rotates around the center line of the first rotating shaft 14 from the second position b to the first position a and the second clamping member 18 rotates around the center line of the first rotating shaft 14 from the first position a to the second position b, the control device 60 is used to control the fourth driving member 13 to drive the second rotating shaft 141 to rotate, so as to drive the first clamping member 16 to rotate around the center line of the second rotating shaft 141.

[0091] In some embodiments, the first lamination mechanism 10 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 sleeved on the output shaft of the fourth driving member 13. The second rotating wheel 172 is sleeved on 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 sleeved on the output shaft of the fifth driving member 15. The fourth rotating wheel 192 is sleeved on the third rotating shaft 142.

[0092] The fourth driving member 13 is configured 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, so as to drive the second rotating shaft 141 to rotate, so as to drive the first clamping member 16 to rotate around the center line of the second rotating shaft 141. The fifth driving member 15 is configured 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, so as to drive the second clamping member 18 to rotate around the center line 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.

[0093] In this embodiment, the control device 60 is configured to control the fourth driving member 13 to drive the first rotating wheel 171 to rotate, and is configured to control the fifth driving member 15 to drive the third rotating wheel 191 to rotate.

[0094] In some embodiments, the first lamination mechanism 10 includes a sixth driving member 151 and a seventh driving member 152. The sixth driving member 151 is connected to the second rotating shaft 141. The seventh driving member 152 is connected to the third rotating shaft 142. The sixth driving member 151 is configured 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). The seventh driving member 152 is configured 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), 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 may include motors.

[0095] In this embodiment, when the first clamping member 16 needs to clamp the pole pieces to be stacked (such as the two third pole pieces mentioned above), the control device 60 can be used to control the sixth 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 pieces to be stacked. Under the condition that the first clamping member 16 clamps the pole pieces to be stacked, the control device 60 is used to control the seventh 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 away from the stacking platform 20. This can avoid the second clamping member 18 interfering with the stacking.

[0096] When the second clamping member 18 needs to clamp the pole pieces to be stacked (such as the two fourth pole pieces mentioned above), the control device 60 can be used to control the seventh 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 pieces to be stacked. Under the condition that the second clamping member 18 clamps the pole pieces to be stacked, the control device 60 is used to control the sixth 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 away from the stacking platform 20. This can avoid the first clamping member 16 interfering with the stacking.

[0097] In the next next stacking, when the first clamping member 16 needs to clamp the pole pieces to be stacked, the control device 60 can also control the sixth 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 pieces to be stacked. In this way, the alternating stacking can be carried out by the rotating first clamping member 16 and the second clamping member 18.

[0098] In some embodiments, the first stacking mechanism 10 includes a connecting frame 101. The first rotating shaft 14 connects the connecting frame 101 and the first driving member 12. 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 14 to rotate, so as to drive the connecting frame 101 to rotate, and drive the first clamping member 16 and the second clamping member 18 to rotate simultaneously.

[0099] In the illustrated example, the stacking device 100 includes a frame body arranged on one side of the stacking platform 20. The first driving member 12 is installed on the frame body. The connecting frame 101 is fixedly installed on the first rotating shaft 14. The arrangement of the connecting frame 101 can improve the rotation stability of the first clamping member 16 and the second clamping member 18.

[0100] In some embodiments, 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 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 pole piece (such as the two third pole pieces mentioned above) through the first clamping piece 161 and the second clamping piece 162; in the first open state, the first clamping member 16 can open the clamped pole piece.

[0101] In this embodiment, both the first clamping piece 161 and the second clamping piece 162 are L-shaped. In the first clamping state, the first clamping member 16 can clamp the two third pole pieces at the same time to clamp the two third pole pieces and the third composite pole piece 313.

[0102] In some embodiments, 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 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 is switched 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 is switched 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 pole piece (such as the two fourth pole pieces mentioned above) through the third clamping piece 181 and the fourth clamping piece 182; in the second open state, the second clamping member 18 can open the clamped pole piece.

[0103] In this embodiment, both the third clamping piece 181 and the fourth clamping piece 182 are L-shaped.

[0104] It can be understood that 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.

[0105] In some embodiments, during the process that the first clamping member 16 rotates around the first rotating shaft 14 and at the same time the second clamping member 18 rotates around the first rotating shaft 14 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, the first clamping member 16 is in the first clamping state, and the second clamping member 18 is in the second clamping state or the second open state. During the process that the first clamping member 16 rotates around the first rotating shaft 14 and at the same time the second clamping member 18 rotates around the first rotating shaft 14 to fold the fourth composite pole piece 314 onto the third pole piece and transfer and fold the clamped two fourth pole pieces and the fifth composite pole piece 315 onto the fourth composite pole piece 314, 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.

[0106] In some embodiments, the lamination device 100 includes a second lamination mechanism 70. The first lamination mechanism 10 and the second lamination mechanism 70 are arranged at intervals. The second lamination mechanism 70 includes a third clamping member 71 and a rotatable fourth rotating shaft 72. The third clamping member 71 is connected to the fourth rotating shaft 72. The first clamping member 16 and the third clamping member 71 are arranged at intervals and opposite to each other. The first rotating shaft 14 and the fourth rotating shaft 72 are arranged at intervals. The first clamping member 16 is used to clamp one side of two third pole pieces at the same time. The third clamping member 71 is used to clamp the other side of two third pole pieces at the same time. Under the condition that the first clamping member 16 rotates around the first rotating shaft 14, the rotating fourth rotating shaft 72 can drive the third clamping member 71 to rotate around the fourth rotating shaft 72 at the same time, 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. The arrangement of the third clamping member 71 can improve the accuracy and stability of the lamination device 100 for lamination.

[0107] In this embodiment, when the first clamping member 16 clamps one side of two third pole pieces and the third clamping member 71 clamps the other side of two third pole pieces, the first clamping member 16 and the third clamping member 71 are basically in the same horizontal position.

[0108] It can be understood that, in order to further improve the accuracy and stability of lamination, the rotation direction of the third clamping member 71 can be made the same as that of the first clamping member 16. Moreover, the third clamping member 71 can be arranged to rotate synchronously with the first clamping member 16.

[0109] It should be noted that the structure of the third clamping member 71 can refer to the structure of the first clamping member 16. Additionally, a separate driving member can be used to drive the fourth rotating shaft 72 to rotate, so as to drive the third clamping member 71 to rotate around the fourth rotating shaft 72.

[0110] It can be understood that the first lamination mechanism 10 and the second lamination mechanism 70 can be symmetrically arranged on both sides of the lamination platform 20. It can be understood that the structure of the second lamination mechanism 70 can refer to the structure of the above-mentioned first lamination mechanism 10. The structure of the second lamination mechanism 70 can be the same as the structure of the above-mentioned first lamination mechanism 10.

[0111] In some embodiments, under the condition that the rotating first rotating shaft 14 drives the first clamping member 16 to rotate around the first rotating shaft 14 in the counterclockwise direction, the rotating fourth rotating shaft 72 can simultaneously drive the third clamping member 71 to rotate around the fourth rotating shaft 72 in the counterclockwise direction, so as to fold the second composite pole piece 312 onto the second pole piece, and transfer the two clamped 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.

[0112] In the present embodiment, the second lamination mechanism 70 includes an eighth driving member 73 and a fourth clamping member 74. The control device 60 is electrically connected to the first driving member 12 and the eighth driving member 73. The eighth driving member 73 is connected to the fourth rotating shaft 72. The fourth rotating shaft 72 is connected to the third clamping member 71 and the fourth clamping member 74. The third clamping member 71 and the fourth clamping member 74 are respectively located on both sides of the fourth rotating shaft 72. The control device 60 is used to control the first driving member 12 to drive the first rotating shaft 14 to rotate, so as to drive the first clamping member 16 and the second clamping member 18 to simultaneously rotate around the first rotating shaft 14 in the counterclockwise direction, and is used to control the eighth driving member 73 to drive the fourth rotating shaft 72 to rotate under the condition that the first clamping member 16 and the second clamping member 18 simultaneously rotate around the first rotating shaft 14 in the counterclockwise direction, so as to drive the third clamping member 71 and the fourth clamping member 74 to simultaneously rotate around the fourth rotating shaft 72 in the counterclockwise direction. This can improve the stability and efficiency of lamination.

[0113] Specifically, under the condition that the rotating first rotating shaft 14 drives the first clamping member 16 and the second clamping member 18 to simultaneously rotate around the first rotating shaft 14 in the counterclockwise direction, the rotating fourth rotating shaft 72 can simultaneously drive the third clamping member 71 and the fourth clamping member 74 to simultaneously rotate around the fourth rotating shaft 72 in the counterclockwise direction, so as to fold the second composite pole piece 312 onto the second pole piece, and transfer the two clamped 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.

[0114] It is understandable that the fourth clamping member 74 can also be used to clamp the pole pieces to be laminated. The setting manner of the fourth clamping member 74 can refer to the setting manner of the second clamping member 18, which will not be elaborated here.

[0115] In some embodiments, the laminating device 100 includes a movable pressing mechanism 80. During the rotation of the first clamping member 16 around the first rotating shaft 14, the pressing mechanism 80 is used to press the second pole piece and the first composite pole piece 311.

[0116] In this embodiment, the pressing mechanism 80 includes a pressing piece for pressing the second pole piece and the first composite pole piece 311. During the rotation of the first clamping member 16 around the first rotating shaft 14 from the first position a to the second position b and the rotation of the second clamping member 18 around the first rotating shaft 14 from the second position b to the first position a, 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 clamped third pole pieces and the third composite pole piece 313 are folded onto the second composite pole piece 312, the first clamping member 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 laminated 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 laminated pole pieces. At this time, the control device 60 can control the first clamping member 16 to withdraw from the position of pressing the laminated pole pieces.

[0117] In addition, during the rotation of the first clamping member 16 around the first rotating shaft 14 from the second position b to the first position a and the rotation of the second clamping member 18 around the first rotating shaft 14 from the first position a to the second position b, the pressing piece presses the pole pieces that have been laminated. After the second clamping member 18 drives the pole pieces to be laminated to be folded onto the lamination platform 20, the second clamping member 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 lamination is completed, and then the second clamping member 18 can be withdrawn.

[0118] That is to say, when reciprocating lamination is performed through the first clamping member 16 and the second clamping member 18, the first clamping member 16 also has the function of pressing the laminated pole pieces, and the second clamping member 18 also has the function of pressing the laminated pole pieces.

[0119] The disclosed embodiments are only specific embodiments of the present invention, which are for clearly illustrating the examples of the present invention and should not be regarded as limiting the scope of the present invention. Certainly, the scope of the claims of the present invention cannot be limited by this either. For those skilled in the art, equivalent changes, modifications, variations, etc. made according to the claims of the present invention still fall within the scope covered by the present invention and should be included within the scope of protection of the claims of the present invention.

Claims

1. A stacking device for stacking lithium-ion batteries, characterized in that, Including: A lamination platform where lamination operations are carried out; A feeding mechanism for providing 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 connected first composite electrode sheet, a second composite electrode sheet, and a third composite electrode sheet. 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 provided on the first composite electrode sheet. The polarity of the second electrode sheet is opposite to that of the first electrode sheet. The second composite electrode sheet is located on one side of the lamination platform; A feeding mechanism for respectively transporting two third electrode sheets above and below the third composite electrode sheet. The polarity of each third electrode sheet is opposite to that of the first electrode sheet; A first lamination mechanism including a first rotating shaft, a first driving member, a fourth driving member, a second rotating shaft, and a movable first clamping member. The first driving member is in transmission connection with the first rotating shaft. The fourth driving member is connected to the second rotating shaft. The second rotating shaft is connected to the first rotating shaft and the first clamping member. The first clamping member is used for clamping two of the third electrode sheets simultaneously to clamp the two third electrode sheets and the third composite electrode sheet. The first driving member is used for driving the first rotating shaft to rotate to drive the second rotating shaft to rotate around the first rotating shaft in a counterclockwise or clockwise direction. The fourth driving member is used for driving the second rotating shaft to rotate to drive the first clamping member to rotate around the second rotating shaft in a counterclockwise or clockwise direction 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 onto the lamination platform to fold them onto the second composite electrode sheet.

2. The lamination device according to claim 1, wherein, The lamination device includes a second driving member and a third driving member. The feeding mechanism includes a first feeding member and a second feeding member. The second driving member is connected to the first feeding member, and the third driving member is connected to the second feeding member; The second driving member is used for driving the first feeding member to move to transport one of the two third electrode sheets to a first predetermined position above the third composite electrode sheet. The third driving member is used for driving the second feeding member to move to transport the other of the two third electrode sheets to a second predetermined position below the third composite electrode sheet.

3. The lamination device according to claim 1, wherein, The first lamination mechanism includes a second clamping member. The first clamping member and the second clamping member are spaced apart. The first clamping member and the second clamping member are respectively located on both sides of the first rotating shaft. The first rotating shaft is connected to the first clamping member and the second clamping member; The first driving member is used for driving the first rotating shaft to rotate to drive the first clamping member and the second clamping member to rotate around the first rotating shaft simultaneously in a clockwise or counterclockwise direction.

4. The lamination device according to claim 3, wherein The first clamping member and the second clamping member are symmetrically arranged on both sides of the center line of the first rotating shaft. The rotating first rotating shaft can drive the first clamping member and the second clamping member to simultaneously perform circular motion around the center line of the first rotating shaft; The rotating first rotating shaft can drive the first clamping member to rotate 180 degrees around the center line of the first rotating shaft from the first position to the second position to fold the second composite pole piece onto the second pole piece, and transfer the two clamped third pole pieces and the third composite pole piece to the lamination platform to be folded onto the second composite pole piece, and can simultaneously drive the second clamping member to rotate 180 degrees around the center line of the first rotating shaft from the second position to the first position; Under the condition that the first clamping member is in the second position and the second clamping member is in the first position, the rotating first rotating shaft can also drive the first clamping member to rotate 180 degrees around the center line of the first rotating shaft from the second position to the first position, and can simultaneously drive the second clamping member to rotate 180 degrees around the center line of the first rotating shaft from the first position to the second position.

5. The lamination device according to claim 3, characterized in that, The plurality of composite pole pieces include a connected fourth composite pole piece and a fifth composite pole piece. The fourth composite pole piece is located between the fifth composite pole piece and the third composite pole piece. The feeding mechanism is used to respectively convey two fourth pole pieces above and below the fifth composite pole piece. The polarity of each fourth pole piece is opposite to the polarity of the first pole piece; After the first clamping member rotates 180 degrees around the first rotating shaft and the second clamping member rotates 180 degrees around the first rotating shaft to fold the second composite pole piece onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece to the lamination platform to be folded onto the second composite pole piece, the second clamping member can simultaneously clamp the two fourth pole pieces to clamp the two fourth pole pieces and the fifth composite pole piece; Under the condition that the second clamping member simultaneously clamps the two fourth pole pieces, the rotating first rotating shaft can drive the first clamping member to rotate 180 degrees around the first rotating shaft, and drive the second clamping member to rotate 180 degrees around the first rotating shaft to fold the fourth composite pole piece onto the third pole piece, and transfer and fold the two clamped fourth pole pieces and the fifth composite pole piece onto the fourth composite pole piece.

6. The lamination device according to claim 3, characterized in that The first lamination mechanism includes a fifth driving member and a third rotating shaft. The fifth driving member is connected to the third rotating shaft. The third rotating shaft is connected to the first rotating shaft and the second clamping member; The fifth driving member is used to drive the third rotating shaft to rotate, so as to drive the second clamping member to rotate around the third rotating shaft in the counterclockwise or clockwise direction.

7. The lamination device according to claim 6, characterized in that, During the process that the first clamping member rotates around the first rotating shaft and the second clamping member rotates around the first rotating shaft to fold the second composite pole piece onto the second pole piece and transfer the two clamped third pole pieces and the third composite pole piece onto the laminating platform to be folded onto the second composite pole piece, the rotating third rotating shaft can drive the second clamping member to rotate around the center line of the third rotating shaft in the counterclockwise or clockwise direction.

8. The lamination device according to claim 6, characterized in that The first laminating mechanism includes a sixth driving member and a seventh driving member, the sixth driving member is connected to the second rotating shaft, and the seventh driving member is connected to the third rotating shaft; The sixth driving member is configured to drive the second rotating shaft to move back and forth along the length direction of the second rotating shaft, so as to drive the first clamping member to move back and forth along the length direction of the second rotating shaft, and the seventh driving member is configured to drive the third rotating shaft to move back and forth along the length direction of the third rotating shaft, so as to drive the second clamping member to move back and forth along the length direction of the third rotating shaft.

9. A lamination device according to claim 1, characterized in that The laminating device includes a second laminating mechanism, the first laminating mechanism and the second laminating mechanism are arranged at intervals, the second laminating mechanism includes a third clamping member and a rotatable fourth rotating shaft, the third clamping member is connected to the fourth rotating shaft, the first clamping member and the third clamping member are arranged at intervals and oppositely, the first rotating shaft and the fourth rotating shaft are arranged at intervals, the first clamping member is used for simultaneously clamping one side of two third pole pieces, and the third clamping member is used for simultaneously clamping the other side of two third pole pieces; Under the condition that the first clamping member rotates around the first rotating shaft, the rotating fourth rotating shaft can simultaneously drive the third clamping member to rotate around the fourth rotating shaft, so as to fold the second composite pole piece onto the second pole piece, and transfer the two clamped third pole pieces and the third composite pole piece onto the laminating platform to be folded onto the second composite pole piece.

10. The lamination device according to claim 9, characterized in that, The first laminating mechanism includes a second clamping member, the first clamping member and the second clamping member are arranged at intervals, the first clamping member and the second clamping member are respectively located on both sides of the first rotating shaft, and the first rotating shaft connects the first clamping member and the second clamping member; The laminating device includes a control device, the second laminating mechanism includes an eighth driving member and a fourth clamping member, the control device is electrically connected to the first driving member and the eighth driving member, the eighth driving member is connected to the fourth rotating shaft, the fourth rotating shaft is connected to the third clamping member and the fourth clamping member, and the third clamping member and the fourth clamping member are respectively located on both sides of the fourth rotating shaft; The control device is used to control the first driving member to drive the first rotating shaft to rotate, so as to drive the first clamping member and the second clamping member to rotate counterclockwise around the first rotating shaft at the same time, and is used to control the eighth driving member to drive the fourth rotating shaft to rotate under the condition that the first clamping member and the second clamping member rotate counterclockwise around the first rotating shaft at the same time, so as to drive the third clamping member and the fourth clamping member to rotate counterclockwise around the fourth rotating shaft at the same time.

11. The lamination device according to claim 1, characterized in that, The laminating device includes a pressing mechanism that can move. During the rotation of the first clamping member around the first rotating shaft, the pressing mechanism is used to press the second pole piece and the first composite pole piece.

12. 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. The distance between the first clamping piece and the second clamping piece in the first clamping state is smaller than the distance between the first clamping piece and the second clamping piece in the first open state; In the first clamping state, the first clamping member can clamp two of the third pole pieces at the same time to clamp the two third pole pieces and the third composite pole piece.

13. A lamination method for laminating lithium-ion batteries, applied to the lamination device according to any one of claims 1-12, characterized in that, Comprising: Providing a plurality of composite pole pieces, each composite pole piece includes two separators and a first pole piece located between the two separators. The plurality of composite pole pieces include a connected first composite pole piece, a second composite pole piece and a third composite pole piece. The second composite pole piece is located between the first composite pole piece and the third composite pole piece; Providing a second pole piece, the polarity of the second pole piece being opposite to the polarity of the first pole piece; Placing the first composite pole piece on the laminating platform and placing the second pole piece on the first composite pole piece. The second composite pole piece is located on one side of the laminating platform; Providing two third pole pieces, the polarity of the third pole piece being opposite to the polarity of the first pole piece; Transporting the two third pole pieces to the upper and lower sides of the third composite pole piece respectively and clamping the two third pole pieces to clamp the two third pole pieces and the third composite pole piece; Transferring the clamped two third pole pieces and the third composite pole piece to the laminating platform to fold the second composite pole piece on the second pole piece, and transferring the clamped two third pole pieces and the third composite pole piece to the laminating platform to fold them on the second composite pole piece.

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