Lamination system

Abstract

The invention provides a lamination system, and relates to the field of batteries. The lamination system comprises a first transfer mechanism, a second transfer mechanism, an isolating membrane unwinding mechanism and a lamination device, wherein the first transfer mechanism is used for transferring a first pole piece; and the second transferring mechanism is used for transferring the second pole piece. The polarity of the second pole piece is opposite to that of the first pole piece. The isolating membrane unwinding mechanism is used for unwinding an isolating membrane. The lamination device is used for receiving the first pole piece, the isolating membrane and the second pole piece and laminating the first pole piece, the isolating membrane and the second pole piece to form a battery cell. The first transfer mechanism, the second transfer mechanism and the isolating membrane unwinding mechanism of the lamination system can respectively provide the first pole piece, the second pole piece and the isolating membrane for the lamination device, and the lamination device can stack the first pole piece, the isolating membrane and the second pole piece to form a battery cell, so that automatic lamination is realized, and the lamination quality and the production efficiency are favorably improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular, to a stacking system. Background Art

[0002] Batteries are widely used in the field of new energy, such as electric vehicles and new energy vehicles. New energy vehicles and electric vehicles have become a new trend in the development of the automotive industry. Electrode assemblies are the components in battery cells where electrochemical reactions occur. Electrode assemblies include wound electrode assemblies and laminated electrode assemblies. At present, the production efficiency of laminated electrode assemblies is low. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a lamination system, which aims to improve the problem of low production efficiency of lamination-type electrode assemblies in the related art.

[0004] An embodiment of the present application provides a stacking system, which includes a first transfer mechanism, a second transfer mechanism, an isolation film unwinding mechanism and a stacking device, wherein the first transfer mechanism is used to transfer the first pole sheet; the second transfer mechanism is used to transfer the second pole sheet, and the polarity of the second pole sheet is opposite to that of the first pole sheet; the isolation film unwinding mechanism is used to unwind the isolation film; the stacking device is used to receive the first pole sheet, the isolation film and the second pole sheet, and stack the first pole sheet, the isolation film and the second pole sheet to form a battery cell.

[0005] In the above technical solution, the first transfer mechanism, the second transfer mechanism and the isolation film unwinding mechanism of the stacking system can respectively provide the first pole sheet, the second pole sheet and the isolation film to the stacking device. The stacking device can stack the first pole sheet, the isolation film and the second pole sheet to form a battery cell, thereby realizing automated stacking, which is beneficial to improving the stacking quality and production efficiency.

[0006] As an optional technical solution of an embodiment of the present application, the isolation film unwinding mechanism has an output part for outputting the isolation film; the stacking device includes a stacking platform and a first driving mechanism, the stacking platform has a first stacking position and a second stacking position, and along the first direction, the first stacking position and the second stacking position are respectively located on both sides of the output part; the stacking platform is used to receive the first pole piece at the first stacking position and to receive the second pole piece at the second stacking position; the first driving mechanism is used to drive the stacking platform to move along the first direction so that the stacking platform switches between the first stacking position and the second stacking position.

[0007] In the above technical solution, the first driving mechanism can drive the stacking platform to switch between the first stacking position and the second stacking position. When the stacking platform is located at the first stacking position, the stacking platform is located on one side of the output part along the first direction. When the stacking platform is located at the second stacking position, the stacking platform is located on the other side of the output part along the first direction. The stacking platform can receive the first pole piece at the first stacking position, and one end of the isolation film can be set on the stacking platform. In the process of switching the stacking platform from the first position to the second position, since the first stacking position and the second stacking position are respectively located on both sides of the output part, the isolation film will gradually cover the first pole piece. The stacking platform reaches the second position, receives the second pole piece, and then switches from the second position to the first position. In the process of switching the stacking platform from the second position to the first position, since the first stacking position and the second stacking position are respectively located on both sides of the output part, the isolation film will gradually cover the second pole piece, and the stacking platform reaches the first position and can receive the first pole piece again. As the stacking platform switches back and forth between the first position and the second position, the first pole piece, the isolation film and the second pole piece are gradually stacked to form a battery cell.

[0008] As an optional technical solution of an embodiment of the present application, the lamination device includes a clamping mechanism, which is arranged on the lamination platform and is used to press the first pole piece, the isolation membrane or the second pole piece onto the lamination platform.

[0009] In the above technical solution, by setting a clamping mechanism, during the process of switching the stacking platform between the first position and the second position, the first pole piece, the isolation membrane or the second pole piece is pressed against the stacking platform, thereby reducing the risk of the first pole piece, the isolation membrane or the second pole piece detaching from the stacking platform, which is beneficial to improving the reliability of the stacking device, improving the stacking quality, reducing the risk of downtime, and ensuring production efficiency to a certain extent.

[0010] As an optional technical solution of an embodiment of the present application, the clamping mechanism includes a clamping piece and a second driving mechanism, the clamping piece is used to press the first pole piece, the isolation membrane or the second pole piece to the stacking platform; the second driving mechanism is connected to the clamping piece, and the second driving mechanism is used to drive the clamping piece to move along a second direction and a third direction, the second direction is the stacking direction of the first pole piece, the isolation membrane and the second pole piece, the third direction intersects with the second direction, and the first direction intersects with the plane where the second direction and the third direction are located.

[0011] In the above technical solution, by setting a second driving mechanism to drive the pressing member to move along the second direction and the third direction, it is convenient to change the position of the pressing member, so that the pressing member can press the first pole piece, the isolation membrane or the second pole piece. When the stacking platform is in the first position or the second position, the second driving mechanism can drive the pressing member to move, so that the pressing member presses the first pole piece, the isolation membrane and the second pole piece, which is located at the uppermost layer.

[0012] As an optional technical solution of the embodiment of the present application, the clamping members are provided on both sides of the stacking platform along the third direction.

[0013] In the above technical solution, by arranging clamping parts on both sides of the stacking platform along the third direction, it is beneficial to improve the clamping effect on the first pole piece, the isolation membrane or the second pole piece, and further reduce the risk of the first pole piece, the isolation membrane or the second pole piece detaching from the stacking platform, which is beneficial to improve the reliability of the stacking device, improve the stacking quality, reduce the risk of downtime, and ensure production efficiency to a certain extent.

[0014] As an optional technical solution of an embodiment of the present application, the pressing member includes a pressing portion, which is used to contact the first pole piece, the isolation membrane or the second pole piece, and the pressing portion is in a sheet shape.

[0015] In the above technical solution, by setting the pressing part in a sheet shape, the thickness of the pressing part along the second direction is small, so that when the lamination platform switches between the first position and the second position, the redundancy of the isolation membrane caused by the isolation membrane covering the pressing part is small. In addition, the pressing part is in a sheet shape, and the contact area between the pressing part and the first pole piece, the isolation membrane or the second pole piece is large, which is not easy to cause stress concentration on the first pole piece, the isolation membrane or the second pole piece, thereby facilitating the improvement of the lamination quality.

[0016] As an optional technical solution of an embodiment of the present application, the stacking device includes a first smoothing mechanism, and the first smoothing mechanism is used to smooth the isolation membrane when the stacking platform switches between the first stacking position and the second stacking position.

[0017] In the above technical solution, a first smoothing mechanism is provided to smooth the isolation membrane when the stacking platform switches between the first stacking position and the second stacking position, thereby reducing the risk of wrinkling of the isolation membrane, making the isolation membrane stacked with the first pole piece and the second pole piece smoother, thereby improving the stacking quality.

[0018] As an optional technical solution of an embodiment of the present application, the stacking device includes a frame, the first smoothing mechanism includes a first smoothing member, the first smoothing member is used to smooth the isolation membrane, the first smoothing member is connected to the frame, and the stacking platform is movably arranged on the frame along the first direction.

[0019] In the above technical solution, the lamination platform is movably arranged on the frame along the first direction, and when the lamination platform moves from the first lamination position to the second lamination position, or from the second lamination position to the first lamination position, the first smoothing member can smooth the isolation film, thereby reducing the risk of wrinkling of the isolation film, making the isolation film stacked with the first pole piece and the second pole piece relatively flat, thereby improving the quality of the lamination.

[0020] As an optional technical solution of an embodiment of the present application, the first smoothing member is made of a flexible material.

[0021] In the above technical solution, the first smoothing member can be fixed to the frame. In this case, the first smoothing member is made of a flexible material. Thus, on the one hand, as the number of laminated layers increases, the thickness of the laminated layers also increases, and the first smoothing member can be deformed to adapt to the increase in the number of laminated layers. On the other hand, the first smoothing member made of a flexible material is not easy to cause damage to the isolation membrane, which is conducive to improving the quality of the laminated layers.

[0022] As an optional technical solution of the embodiment of the present application, the output unit is connected to the rack.

[0023] In the above technical solution, the output unit is connected to the frame to determine the position of the output unit, so that the output unit can be located between the first stacking position and the second stacking position, so as to improve the accuracy of subsequent stacking.

[0024] As an optional technical solution of an embodiment of the present application, the stacking device includes a flipping mechanism, the flipping mechanism and the stacking platform are arranged along the first direction, the stacking platform can move along the first direction to transport the battery cell to the flipping mechanism, and the flipping mechanism is used to drive the battery cell to flip so that the isolation film is covered on the outside of the battery cell.

[0025] In the above technical solution, after the stacking platform completes stacking, it can move along the first direction to supply the battery cell to the flipping mechanism. The flipping mechanism receives the battery cell and drives the battery cell to flip, so that the isolation film is covered on the outside of the battery cell. On the one hand, the isolation film can protect the battery cell. On the other hand, the isolation film insulates the battery cell from other components.

[0026] As an optional technical solution of an embodiment of the present application, the lamination device includes a second smoothing mechanism, and the second smoothing mechanism is used to smooth at least a portion of the isolation membrane located between the flipping mechanism and the output portion along the extension direction of the isolation membrane.

[0027] In the above technical solution, a second smoothing mechanism is provided to smooth at least a portion of the isolation film between the flipping mechanism and the output portion. In this way, the insulating film wrapped around the outside of the battery cell is relatively flat and not prone to wrinkling, thereby improving the quality of the stacking.

[0028] As an optional technical solution of an embodiment of the present application, the second smoothing mechanism includes a third driving mechanism and a second smoothing member, the second smoothing member is connected to the third driving mechanism, and the third driving mechanism is used to drive the second smoothing member to move along the extension direction of the isolation membrane so that the second smoothing member smoothes the isolation membrane.

[0029] In the above technical solution, by providing the third driving mechanism, it is convenient to drive the second smoothing member to move along the extension direction of the isolation membrane, so as to smooth the isolation membrane. The structure is relatively simple and the smoothing effect is better.

[0030] As an optional technical solution of the embodiment of the present application, the second smoothing member is in a wheel shape, and the third driving mechanism is also used to drive the second smoothing member to rotate.

[0031] In the above technical solution, the second smoothing member can rotate relative to the isolation membrane while moving along the extension direction of the isolation membrane. In this way, rolling friction is formed between the second smoothing member and the isolation membrane, which has less friction force on the isolation membrane and is less likely to cause damage to the isolation membrane, thereby helping to improve the quality of the lamination.

[0032] As an optional technical solution of an embodiment of the present application, the isolation film unwinding mechanism includes a cutter unit, and the cutter unit is used to cut the isolation film.

[0033] In the above technical solution, by providing a cutter unit, after the first pole sheet, the isolation membrane and the second pole sheet are stacked, the isolation membrane is cut off to prepare for the stacking of the next battery cell.

[0034] As an optional technical solution of an embodiment of the present application, the first transfer mechanism includes a first picking unit and a first detection unit, the first picking unit is used to pick up the first pole piece, the first detection unit is used to detect the number of the first pole pieces picked up by the first picking unit at a single time, and the first picking unit responds to the first detection unit; and / or the second transfer mechanism includes a second picking unit and a second detection unit, the second picking unit is used to pick up the second pole piece, the second detection unit is used to detect the number of the second pole pieces picked up by the second picking unit at a single time, and the second picking unit responds to the second detection unit.

[0035] In the above technical solution, a plurality of first pole pieces can be stored in a silo, and two adjacent first pole pieces are prone to adhesion. A first detection unit is provided to detect the number of first pole pieces picked up by the first pickup unit, so that when the first pickup unit picks up multiple first pole pieces, the first pickup unit is controlled to transfer the picked up first pole pieces to a waste area or a recycling area. Similarly, a plurality of second pole pieces can be stored in a silo, and two adjacent second pole pieces are prone to adhesion. A second detection unit is provided to detect the number of second pole pieces picked up by the second pickup unit, so that when the second pickup unit picks up multiple second pole pieces, the second pickup unit is controlled to transfer the picked up second pole pieces to a waste area or a recycling area.

[0036] As an optional technical solution of an embodiment of the present application, the first detection unit includes a first thickness detection unit, which is used to detect the thickness of the first pole piece picked up by the first picking unit at a single time to obtain the number of the first pole pieces; and / or the second detection unit includes a second thickness detection unit, which is used to detect the thickness of the second pole piece picked up by the second picking unit at a single time to obtain the number of the second pole pieces.

[0037] In the above technical solution, the first thickness detection unit obtains the number of the first pole piece by detecting the thickness of the first pole piece picked up by the first pickup unit, thereby determining whether there are multiple pieces of the first pole piece picked up by the first pickup unit adhering to each other. If so, the first pickup unit can respond to the first thickness detection unit and transfer the first pole piece picked up by it to the waste area or the recycling area. Similarly, the second thickness detection unit obtains the number of the second pole piece by detecting the thickness of the second pole piece picked up by the second pickup unit, thereby determining whether there are multiple pieces of the second pole piece picked up by the second pickup unit adhering to each other. If so, the second pickup unit can respond to the second thickness detection unit and transfer the second pole piece picked up by it to the waste area or the recycling area.

[0038] As an optional technical solution of an embodiment of the present application, the stacking system also includes a first detection mechanism, which is arranged upstream of the stacking device, and the first detection mechanism is used to detect the appearance of the first pole piece and the second pole piece, and the first transfer mechanism and the second transfer mechanism both respond to the first detection mechanism.

[0039] In the above technical solution, a first detection mechanism is provided to detect the appearance of the first electrode piece and the second electrode piece to confirm whether the first electrode piece transferred by the first transfer mechanism and the second electrode piece transferred by the second transfer mechanism meet the standards. If they meet the standards, the first transfer mechanism is allowed to transfer the first electrode piece it picks up to the lamination device, and the second transfer mechanism is allowed to transfer the second electrode piece it picks up to the lamination device. If they do not meet the standards, the first transfer mechanism transfers the first electrode piece it transfers to the waste area or the recycling area, and the second transfer mechanism transfers the second electrode piece it transfers to the waste area or the recycling area.

[0040] As an optional technical solution of an embodiment of the present application, the stacking system includes a first gluing mechanism, which is arranged downstream of the stacking device, and the first gluing mechanism is used to apply finishing glue or four-corner glue to the battery cell.

[0041] In the above technical solution, by providing a first glue sticking mechanism, after the stacking device completes stacking to form a battery cell, finishing glue or four-corner glue is applied to the battery cell to stabilize the shape of the battery cell and reduce the risk of battery cell collapse.

[0042] As an optional technical solution of an embodiment of the present application, the first gluing mechanism includes a glue material unwinding mechanism, a glue application assembly, a material pulling mechanism and a cutting mechanism, the glue material unwinding mechanism is used for unwinding the glue tape; the material pulling mechanism is used for pulling the glue tape to convey the glue tape to the gluing assembly; the cutting mechanism is used for cutting off the portion of the glue tape between the material pulling mechanism and the gluing assembly to obtain glue, and the gluing assembly is used for sticking the glue material to the battery cell.

[0043] In the above technical solution, the material pulling mechanism can pull the tape, thereby unwinding the tape, so that the unwinding can be carried out according to the required amount of tape. After the material pulling mechanism pulls the tape and supplies the tape to the gluing assembly, the cutter mechanism can cut the tape between the material pulling mechanism and the gluing assembly to obtain the adhesive. The gluing assembly can stick the adhesive to the battery cell to complete the finishing glue or the four-corner glue. The first gluing mechanism is used to perform the gluing operation, and the adhesive of the required length can be unrolled each time as needed, and it can be pasted to the battery cell. In this way, the length of the adhesive is more appropriate, which can effectively stabilize the shape of the battery cell, reduce the risk of battery cell collapse, and is not easy to interfere with other components.

[0044] As an optional technical solution of an embodiment of the present application, the pulling mechanism includes a first clamping unit and a second clamping unit, both of which are used to clamp the tape, and the second clamping unit can move toward or away from the first clamping unit.

[0045] In the above technical solution, when the tape needs to be unwound, the first clamping unit is released, the second clamping unit clamps the tape and moves toward or away from the first clamping unit to pull the tape to unwind. After the first clamping unit moves into position, the tape of a fixed length is unwound. At this time, both the first clamping unit and the second clamping unit clamp the tape, so that the cutting mechanism can cut the tape to form a rubber material. Afterwards, the second clamping unit releases the tape and moves toward or away from the first clamping unit to complete the reset and prepare for the next material pulling.

[0046] As an optional technical solution of an embodiment of the present application, the glue sticking assembly includes a fourth driving mechanism and an adsorption member, the adsorption member is used to adsorb the glue, the fourth driving mechanism is connected to the adsorption member, and the fourth driving mechanism is used to drive the adsorption member to move so as to stick the glue to the battery cell.

[0047] In the above technical solution, the adhesive is adsorbed by the adsorbent, which can not only pick up the adhesive well but also not easily damage the adhesive. The adsorbent is driven to move by the fourth driving mechanism to transfer the adhesive and stick the adhesive to the battery cell.

[0048] As an optional technical solution of the embodiment of the present application, the lamination system includes a plurality of the first gluing mechanisms, and the plurality of the first gluing mechanisms are all used for gluing the battery cells.

[0049] In the above technical solution, by providing a plurality of first gluing mechanisms, the plurality of first gluing mechanisms can perform gluing at the same time, thereby improving the gluing efficiency and improving the production efficiency.

[0050] As an optional technical solution of an embodiment of the present application, the lamination system includes a hot pressing device, which is arranged downstream of the lamination device and is used for hot pressing the battery cell.

[0051] In the above technical solution, by setting up a hot pressing device to hot press the battery cell, on the one hand, the flatness of the battery cell can be improved, so that the thickness of the battery cell meets the requirements and has a high consistency. On the other hand, it can reduce the wrinkles of the isolation membrane, drive out the air inside the battery cell, make the isolation membrane and the first pole piece, the isolation membrane and the second pole piece closely attached together, shorten the diffusion distance of metal ions, and reduce the internal resistance of the battery cell.

[0052] As an optional technical solution of an embodiment of the present application, the hot pressing device includes a hot pressing workbench, a hot pressing piece and a fifth driving mechanism, wherein the hot pressing workbench is used to place the battery cell; the hot pressing piece is arranged opposite to the hot pressing workbench; the fifth driving mechanism is connected to the hot pressing piece, and the fifth driving mechanism is used to drive the hot pressing piece to approach the battery cell so that the hot pressing piece can hot press the battery cell.

[0053] In the above technical solution, the battery cell can be placed on the hot pressing workbench, at which time the fifth driving mechanism can drive the hot pressing piece close to the battery cell, so as to hot press the battery cell. After the hot pressing is completed, the fifth driving mechanism can drive the hot pressing piece away from the battery cell, so as to allow the battery cell to be transferred to the next station and prepare for the next hot pressing.

[0054] As an optional technical solution of an embodiment of the present application, a first probe and a second probe are provided on the hot pressing member, and the first probe and the second probe are used to electrically connect with the first electrode piece and the second electrode piece of the battery cell respectively when the hot pressing member hot presses the battery cell.

[0055] In the above technical solution, by providing a first probe and a second probe, the first probe and the second probe can be electrically connected to the first electrode piece and the second electrode piece of the battery cell respectively, so as to perform a resistance test on the battery cell.

[0056] As an optional technical solution of the embodiment of the present application, a surface of the hot pressing part facing the hot pressing workbench is provided with an anti-stick coating.

[0057] In the above technical solution, by providing an anti-stick coating on the surface of the hot pressing part facing the hot pressing workbench, the risk of adhesion between the hot pressing part and the battery cell can be reduced, and the risk of other impurities adhering to the hot pressing part can be reduced, thereby reducing the risk of damage to the battery cell caused by the hot pressing part when hot pressing the battery cell.

[0058] As an optional technical solution of an embodiment of the present application, the anti-stick coating includes a ceramic layer.

[0059] In the above technical solution, a ceramic layer is used as the anti-sticking coating, which has a good anti-sticking effect and a low cost.

[0060] As an optional technical solution of an embodiment of the present application, the lamination system includes a tab welding mechanism, which is arranged downstream of the lamination device and is used to weld tabs on the battery cell.

[0061] In the above technical solution, the pole tab welding mechanism is used to facilitate automatic welding of the pole tabs for the battery cells, thereby improving the degree of automation of the stacking system.

[0062] As an optional technical solution of an embodiment of the present application, the pole lug welding mechanism includes a first pole lug providing mechanism, a second pole lug providing mechanism, a first welding mechanism, a second welding mechanism and a conveying mechanism, the first pole lug providing mechanism is arranged at the first workstation, and the first pole lug providing mechanism is used to provide the first pole lug; the second pole lug providing mechanism is arranged at the second workstation, and the second pole lug providing mechanism is used to provide the second pole lug; the first welding mechanism is arranged at the third workstation, and the first welding mechanism is used to weld the first pole lug and the first pole piece; the second welding mechanism is arranged at the fourth workstation, and the second welding mechanism is used to weld the second pole lug and the second pole piece; the conveying mechanism is used to convey the battery cell to the first workstation, the second workstation, the third workstation and the fourth workstation.

[0063] In the above technical solution, the conveying mechanism conveys the battery cell to the first station, the second station, the third station and the fourth station. When the battery cell passes through the first station, the first pole tab providing mechanism provides the first pole tab to the battery cell. When the battery cell passes through the second station, the second pole tab providing mechanism provides the second pole tab to the battery cell. When the battery cell passes through the third station, the first welding mechanism welds the first pole tab to the battery cell. When the battery cell passes through the fourth station, the second welding mechanism welds the second pole tab to the battery cell, so as to complete the automatic welding of the first pole sheet and the battery cell and the automatic welding of the second pole sheet and the battery cell, which has a high degree of automation.

[0064] As an optional technical solution of an embodiment of the present application, the conveying mechanism includes a turntable, and the first pole tab providing mechanism, the second pole tab providing mechanism, the first welding mechanism and the second welding mechanism are arranged along the circumference of the turntable.

[0065] In the above technical solution, the conveying mechanism includes a turntable, and the battery cells are conveyed to the first station, the second station, the third station and the fourth station by the rotation of the turntable. The turntable occupies a small area and has high conveying efficiency and conveying stability.

[0066] As an optional technical solution of an embodiment of the present application, a positioning fixture is provided on the turntable, and the positioning fixture is used to position the battery cell, the first pole lug and the second pole lug.

[0067] In the above technical solution, the battery cell, the first pole lug and the second pole lug are positioned by setting a positioning fixture, so that the relative position of the first pole lug and the battery cell, and the relative position of the second pole lug and the battery cell are not easy to change, which is beneficial to improving the welding effect.

[0068] As an optional technical solution of an embodiment of the present application, the positioning fixture includes a support table, a first jaw, a second jaw and a third jaw, the support table is connected to the turntable, the first jaw, the second jaw and the third jaw are connected to the support table, the first jaw is used to position the battery cell on the support table, the second jaw is used to position the first pole ear on the battery cell, and the third jaw is used to position the second pole ear on the battery cell.

[0069] In the above technical solution, the support table is connected to the turntable, and the turntable can transport the support table to the first station, the second station, the third station and the fourth station. The first clamp can position the battery cell on the support table so that the relative position of the battery cell and the support table is not easy to change. The second clamp can position the first pole ear on the battery cell so that the relative position of the first pole ear and the battery cell is not easy to change. The third clamp can position the second pole ear on the battery cell so that the relative position of the second pole ear and the battery cell is not easy to change, which is conducive to improving the welding effect.

[0070] As an optional technical solution of an embodiment of the present application, the first welding mechanism includes a first welding head and a first dust removal mechanism, the first welding head is used to weld the first pole ear and the first pole piece, and the first dust removal mechanism is used to remove dust from the first welding head; and / or the second welding mechanism includes a second welding head and a second dust removal mechanism, the second welding head is used to weld the second pole ear and the second pole piece, and the second dust removal mechanism is used to remove dust from the second welding head.

[0071] In the above technical solution, by setting the first dust removal mechanism to remove dust from the first welding head, the first welding head is kept clean before welding the first pole ear and the battery cell each time, which is conducive to improving the welding effect. Similarly, by setting the second dust removal mechanism to remove dust from the second welding head, the second welding head is kept clean before welding the second pole ear and the battery cell each time, which is conducive to improving the welding effect.

[0072] As an optional technical solution of an embodiment of the present application, the pole tab welding mechanism also includes a second gluing mechanism, which is arranged at the fifth workstation, and the conveying mechanism is also used to convey the battery cell to the fifth workstation, and the second gluing mechanism is used to glue at the welding position of the first pole tab and the first pole sheet and the welding position of the second pole tab and the second pole sheet.

[0073] In the above technical solution, the conveying mechanism can convey the battery cell to the first station, the second station, the third station, the fourth station and the fifth station. At the third station, the first welding mechanism welds the first pole piece to the battery cell, and at the fourth station, the second welding mechanism welds the second pole piece to the battery cell. At the fifth station, the second gluing mechanism can glue the welding position between the first pole tab and the first pole piece and the welding position between the second pole tab and the second pole piece to protect the welding position.

[0074] As an optional technical solution of an embodiment of the present application, the tab welding mechanism includes a second detection mechanism, which is arranged at the sixth workstation. The conveying mechanism is also used to convey the battery cell to the sixth workstation, and the second detection mechanism is used to detect the appearance of the battery cell.

[0075] In the above technical solution, the conveying mechanism can convey the battery cell to the first station, the second station, the third station, the fourth station, the fifth station and the sixth station. At the third station, the first welding mechanism welds the first pole piece to the battery cell, and at the fourth station, the second welding mechanism welds the second pole piece to the battery cell. At the fifth station, the second gluing mechanism can glue the welding position between the first pole ear and the first pole piece and the welding position between the second pole ear and the second pole piece to protect the welding position. At the sixth station, the second inspection mechanism can inspect the appearance of the battery cell after welding and gluing to confirm whether the battery cell meets the standards.

[0076] As an optional technical solution of an embodiment of the present application, the stacking system includes a first gluing mechanism, a hot pressing device and a tab welding mechanism, the first gluing mechanism is used to apply finishing glue or four-corner glue to the battery cell, the hot pressing device is used to hot press the battery cell, and the tab welding mechanism is used to weld the tabs on the battery cell, the first gluing mechanism is arranged downstream of the stacking device, the hot pressing device is arranged downstream of the first gluing mechanism, and the tab welding mechanism is arranged downstream of the hot pressing device.

[0077] In the above technical solution, the first gluing mechanism can apply finishing glue or four-corner glue to the stacked battery cells, the hot pressing device can hot press the battery cells after gluing, and the tab welding mechanism can weld the first tab and the second tab to the hot-pressed battery cells to produce the final battery cells, which has a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0079] Figure 1 A schematic diagram of the structure of a lamination system provided in some embodiments of the present application;

[0080] Figure 2 A schematic diagram of the structure of the connection between the isolation film unwinding mechanism and the lamination device provided in some embodiments of the present application;

[0081] Figure 3 A simplified schematic diagram of the connection between the release film unwinding mechanism and the lamination device provided in some embodiments of the present application;

[0082] Figure 4 A schematic diagram of the structure of the connection between the lamination platform and the clamping mechanism provided in some embodiments of the present application;

[0083] Figure 5 for Figure 2 A magnified view of position A in the middle;

[0084] Figure 6 A schematic diagram of placing a first pole piece on a lamination platform provided in some embodiments of the present application;

[0085] Figure 7 A schematic diagram of an isolation film covering a first pole piece provided in some embodiments of the present application;

[0086] Figure 8 A schematic diagram of placing a second pole piece on a lamination platform provided in some embodiments of the present application;

[0087] Fig. 9 A schematic diagram of an isolation film covering a second pole piece provided in some embodiments of the present application;

[0088] Fig.10 A schematic diagram of placing a second first pole piece on a lamination platform provided in some embodiments of the present application;

[0089] Fig.11 A schematic diagram of the structure of a first transfer mechanism provided in some embodiments of the present application;

[0090] Fig.12 A schematic block diagram of the connection between the first detection unit and the first pickup unit provided in some embodiments of the present application;

[0091] Fig.13 A schematic diagram of the structure of a first adhesive bonding mechanism provided in some embodiments of the present application;

[0092] Fig.14 A schematic diagram of the structure of a hot pressing device provided in some embodiments of the present application;

[0093] Fig.15 A schematic diagram of the structure of a first electrode providing mechanism provided in some embodiments of the present application;

[0094] Fig.16 A schematic structural diagram of a first welding mechanism provided in some embodiments of the present application;

[0095] Fig.17 A schematic diagram of the structure of a conveying mechanism provided in some embodiments of the present application;

[0096] Fig.18 A schematic diagram of the structure of a positioning fixture provided in some embodiments of the present application.

[0097] Icons: 10-stacking system; 11-first transfer mechanism; 111-fourth driving member; 112-fifth driving member; 113-first picking unit; 114-first detection unit; 115-first detection mechanism; 116-third dust removal mechanism; 12-second transfer mechanism; 13-stacking device; 131-stacking platform; 1311-adsorption hole; 132-first driving mechanism; 133-pressing mechanism; 1331-pressing member; 13311-pressing part; 1332-second driving mechanism; 13321-first driving member; 13322-second driving member; 13 4-first smoothing member; 135-turning mechanism; 136-second smoothing mechanism; 1361-third driving mechanism; 1362-second smoothing member; 137-third transfer mechanism; 138-first stacking position; 1381-first sensor; 139-second stacking position; 1391-second sensor; 14-isolating film unwinding mechanism; 141-output unit; 142-first unwinding roller; 143-passing roller; 144-frame; 145-cutter unit; 146-active roller; 15-first gluing mechanism; 151-glue unwinding mechanism; 152-gluing assembly; 15 21-adsorption member; 1522-fourth driving mechanism; 153-pulling mechanism; 1531-first clamping unit; 1532-second clamping unit; 154-cutter mechanism; 16-hot pressing device; 161-hot pressing workbench; 162-hot pressing member; 163-fifth driving mechanism; 17-ear welding mechanism; 171-first ear providing mechanism; 1711-material unwinding mechanism; 1712-fourth conveying mechanism; 17121-picking member; 17122-sixth driving member; 1713-pulling mechanism; 17131-third clamping unit; 17132-fourth Clamping unit; 1714-cutting mechanism; 173-first welding mechanism; 1731-first welding head; 1732-first dust removal mechanism; 17321-dust removal member; 17322-sixth driving mechanism; 1733-seventh driving member; 175-conveying mechanism; 1751-turntable; 1752-positioning fixture; 17521-support table; 17522-first clamp; 17523-second clamp; 17524-third clamp; 20-battery cell; 21-first pole piece; 22-second pole piece; 23-isolating membrane; 24-first pole ear; 25-second pole ear. DETAILED DESCRIPTION

[0098] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0099] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0100] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0101] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0102] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0103] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0104] The term "plurality" used in the present application refers to two or more (including two).

[0105] In the present application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0106] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells to a certain extent.

[0107] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive sub-pole ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as a negative sub-pole ear. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current can pass without melting, the number of positive pole ears is multiple and stacked together, and the number of negative pole ears is multiple and stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene).

[0108] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0109] The electrode assembly is the part in the battery cell where the electrochemical reaction occurs. The electrode assembly includes a wound electrode assembly and a laminated electrode assembly. Currently, the production efficiency of the laminated electrode assembly is low.

[0110] In the prior art, laminated electrode assemblies are generally produced by manual lamination. The quality of laminated electrode assemblies manufactured by this production method depends largely on the proficiency of the workers. Not only the lamination quality of the laminated electrode assemblies cannot be guaranteed, but also the production efficiency is low.

[0111] In view of this, an embodiment of the present application provides a stacking system, which includes a first transfer mechanism, a second transfer mechanism, an isolation film unwinding mechanism and a stacking device. The first transfer mechanism is used to transfer the first pole piece. The second transfer mechanism is used to transfer the second pole piece, and the polarity of the second pole piece is opposite to that of the first pole piece. The isolation film unwinding mechanism is used to unwind the isolation film. The stacking device is used to receive the first pole piece, the isolation film and the second pole piece, and stack the first pole piece, the isolation film and the second pole piece to form a battery cell.

[0112] The first transfer mechanism, the second transfer mechanism and the isolation film unwinding mechanism of the stacking system can respectively provide the first pole sheet, the second pole sheet and the isolation film to the stacking device. The stacking device can stack the first pole sheet, the isolation film and the second pole sheet to form a battery cell, thereby realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0113] The technical solution described in the embodiment of the present application is applicable to the manufacture of laminated electrode assemblies, and the use of the laminated system is beneficial to improving the laminated quality and production efficiency.

[0114] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a stacking system 10 provided for some embodiments of the present application. An embodiment of the present application provides a stacking system 10, and the stacking system 10 includes a first transfer mechanism 11, a second transfer mechanism 12, an isolation film unwinding mechanism 14, and a stacking device 13. The first transfer mechanism 11 is used to transfer the first pole piece 21. The second transfer mechanism 12 is used to transfer the second pole piece 22, and the polarity of the second pole piece 22 is opposite to that of the first pole piece 21. The isolation film unwinding mechanism 14 is used to unwind the isolation film 23. The stacking device 13 is used to receive the first pole piece 21, the isolation film 23, and the second pole piece 22, and stack the first pole piece 21, the isolation film 23, and the second pole piece 22 to form a battery cell 20.

[0115] The first transfer mechanism 11 is a mechanism for transferring the first pole piece 21 to the lamination device 13. The first transfer mechanism 11 may include a two-axis manipulator, a three-axis manipulator, a four-axis manipulator, and the like.

[0116] The second transfer mechanism 12 is a mechanism for transferring the second pole piece 22 to the lamination device 13. The second transfer mechanism 12 may include a two-axis manipulator, a three-axis manipulator, a four-axis manipulator, and the like.

[0117] The polarities of the first pole piece 21 and the second pole piece 22 are opposite, that is, one of the first pole piece 21 and the second pole piece 22 is a positive pole piece, and the other is a negative pole piece. When the first pole piece 21 is a positive pole piece, the second pole piece 22 is a negative pole piece. When the first pole piece 21 is a negative pole piece, the second pole piece 22 is a positive pole piece.

[0118] The separator film unwinding mechanism 14 is a mechanism for unwinding the separator film 23 to the laminating device 13. The separator film 23 may be made of PP (polypropylene) or PE (polyethylene).

[0119] The stacking device 13 is capable of receiving the first pole sheet 21 provided by the first transfer mechanism 11 , the isolation film 23 unwound by the isolation film unwinding mechanism 14 , and the second pole sheet 22 transferred by the second transfer mechanism 12 , and stacking the first pole sheet 21 , the isolation film 23 and the second pole sheet 22 together to form a battery cell 20 .

[0120] The first transfer mechanism 11, the second transfer mechanism 12 and the isolation film unwinding mechanism 14 of the stacking system 10 can respectively provide the first pole sheet 21, the second pole sheet 22 and the isolation film 23 to the stacking device 13. The stacking device 13 can stack the first pole sheet 21, the isolation film 23 and the second pole sheet 22 to form a battery cell 20, thereby realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0121] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 2 A schematic structural diagram of the connection between the isolation film unwinding mechanism 14 and the lamination device 13 provided in some embodiments of the present application. Figure 3 A simplified schematic diagram of the connection between the isolation film unwinding mechanism 14 and the stacking device 13 provided in some embodiments of the present application. In some embodiments, the isolation film unwinding mechanism 14 has an output portion 141 for outputting the isolation film 23. The stacking device 13 includes a stacking platform 131 and a first driving mechanism 132. The stacking platform 131 has a first stacking position 138 and a second stacking position 139. Along the first direction, the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output portion 141. The stacking platform 131 is used to receive the first pole piece 21 at the first stacking position 138 and the second pole piece 22 at the second stacking position 139. The first driving mechanism 132 is used to drive the stacking platform 131 to move along the first direction so that the stacking platform 131 switches between the first stacking position 138 and the second stacking position 139.

[0122] The output portion 141 is a component of the isolation film unwinding mechanism 14 for outputting the isolation film 23. The isolation film unwinding mechanism 14 may include a first unwinding roller 142, a plurality of rollers 143, and an output portion 141. The first unwinding roller 142 is used to install the isolation film 23 roll, and the isolation film 23 passes through the plurality of rollers 143 and is output from the output portion 141. In some embodiments, the first unwinding roller 142 can be actively rotated under the drive of the driving mechanism, thereby realizing active unwinding. In other embodiments, the isolation film unwinding mechanism 14 also includes an active roller 146, which acts on the isolation film 23, thereby driving the isolation film 23 to unwind.

[0123] Optionally, the output portion 141 includes two conveying rollers arranged side by side along the first direction, and a gap is formed between the two conveying rollers for the isolation film 23 to pass through.

[0124] The first direction is the moving direction of the lamination platform 131. Figure 2 , the first direction may be the X direction shown in the figure.

[0125] The stacking platform 131 is a platform structure for receiving and supporting the first pole piece 21, the isolation film 23 and the second pole piece 22. The first pole piece 21, the isolation film 23 and the second pole piece 22 are gradually stacked on the stacking platform 131. The stacking platform 131 has a first stacking position 138 and a second stacking position 139. When the stacking platform 131 is located at the first stacking position 138, the stacking platform 131 is located on one side of the output part 141 along the first direction. When the stacking platform 131 is located at the second stacking position 139, the stacking platform 131 is located on the other side of the output part 141 along the first direction. In other words, the output part 141 is located between the first stacking position 138 and the second stacking position 139 along the first direction. The stacking platform 131 receives the first pole piece 21 at the first stacking position 138 and receives the second pole piece 22 at the second stacking position 139.

[0126] In some embodiments, in order to facilitate detection of whether the stacking platform 131 reaches the first stacking position 138 and the second stacking position 139, a first sensor 1381 is provided at the first stacking position 138, and a second sensor 1391 is provided at the second stacking position 139. The first driving mechanism 132 responds to the first sensor 1381 and the second sensor 1391. The first sensor 1381 and the second sensor 1391 can be in-position sensors, industrial cameras, etc. Along the first direction, the first sensor 1381 and the second sensor 1391 are respectively located on both sides of the output portion 141.

[0127] Optionally, adsorption holes 1311 are provided on the support surface of the stacking platform 131 , and the adsorption holes 1311 are connected to a negative pressure mechanism for extracting negative pressure for the adsorption holes 1311 , thereby adsorbing the first pole piece 21 , the isolation membrane 23 and the second pole piece 22 on the stacking platform 131 .

[0128] The first driving mechanism 132 is connected to the lamination platform 131, and the first driving mechanism 132 is used to drive the lamination platform 131 to move along the first direction, so as to switch the lamination platform 131 between the first lamination position 138 and the second lamination position 139. The first driving mechanism 132 may include a linear driving member, the output end of which is connected to the lamination platform 131, and the linear driving member drives the lamination platform 131 to move along the first direction. The linear driving member may be a linear cylinder, a linear electric cylinder, a linear oil cylinder, etc. The first driving mechanism 132 may also include a rotating driving member and a transmission mechanism, the rotating driving member is connected to the lamination platform 131 through the transmission mechanism, the rotating driving member outputs a rotating motion, and the transmission mechanism converts the rotating motion output by the rotating driving member into a linear motion of the lamination platform 131. The rotating driving member may be a motor, an internal combustion engine, etc. The transmission mechanism may be a crank slider mechanism, a lead screw nut mechanism, etc.

[0129] The first driving mechanism 132 can drive the stacking platform 131 to switch between the first stacking position 138 and the second stacking position 139. When the stacking platform 131 is located at the first stacking position 138, the stacking platform 131 is located on one side of the output part 141 along the first direction. When the stacking platform 131 is located at the second stacking position 139, the stacking platform 131 is located on the other side of the output part 141 along the first direction. The stacking platform 131 can receive the first pole piece 21 at the first stacking position 138, and one end of the isolation film 23 can be set on the stacking platform 131. In the process of switching the stacking platform 131 from the first position to the second position, since the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output part 141, the isolation film 23 will gradually cover the first pole piece 21. The stacking platform 131 reaches the second position, receives the second pole piece 22, and then switches from the second position to the first position. During the process of switching the stacking platform 131 from the second position to the first position, since the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output portion 141, the isolation film 23 will gradually cover the second pole piece 22, and the stacking platform 131 reaches the first position and can receive the first pole piece 21 again. As the stacking platform 131 switches back and forth between the first position and the second position, the first pole piece 21, the isolation film 23 and the second pole piece 22 are gradually stacked to form the battery cell 20.

[0130] Please refer to Figure 2 , Figure 3 and Figure 4 , Figure 4 A schematic diagram of the structure of the connection between the lamination platform 131 and the clamping mechanism 133 provided in some embodiments of the present application. In some embodiments, the lamination device 13 includes a clamping mechanism 133, which is disposed on the lamination platform 131. The clamping mechanism 133 is used to clamp the first pole piece 21, the isolation membrane 23 or the second pole piece 22 to the lamination platform 131.

[0131] The clamping mechanism 133 is a mechanism for clamping the first pole piece 21, the isolation membrane 23 or the second pole piece 22 to the stacking platform 131. The clamping mechanism 133 can clamp the first pole piece 21, the isolation membrane 23 and the second pole piece 22 located at the uppermost side by clamping the first pole piece 21, the isolation membrane 23 and the second pole piece 22 located at the lower side. For example, when the stacking platform 131 is in the first stacking position 138, the clamping mechanism 133 can contact the first pole piece 21 located at the uppermost side, thereby clamping the stacked first pole piece 21, the isolation membrane 23 and the second pole piece 22. For another example, when the stacking platform 131 is in the second stacking position 139, the clamping mechanism 133 can contact the second pole piece 22 located at the uppermost side, thereby clamping the stacked first pole piece 21, the isolation membrane 23 and the second pole piece 22.

[0132] By setting the clamping mechanism 133, when the stacking platform 131 is switched between the first position and the second position, the first pole piece 21, the isolation membrane 23 or the second pole piece 22 is pressed against the stacking platform 131, thereby reducing the risk of the first pole piece 21, the isolation membrane 23 or the second pole piece 22 detaching from the stacking platform 131, which is beneficial to improving the reliability of the stacking device 13, improving the stacking quality, reducing the risk of downtime, and ensuring production efficiency to a certain extent.

[0133] Please refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the pressing mechanism 133 includes a pressing member 1331 and a second driving mechanism 1332, and the pressing member 1331 is used to press the first pole piece 21, the isolation film 23 or the second pole piece 22 to the lamination platform 131. The second driving mechanism 1332 is connected to the pressing member 1331, and the second driving mechanism 1332 is used to drive the pressing member 1331 to move along the second direction and the third direction. The second direction is the stacking direction of the first pole piece 21, the isolation film 23 and the second pole piece 22, the third direction intersects with the second direction, and the first direction intersects with the plane where the second direction and the third direction are located.

[0134] The second direction is the stacking direction of the first pole piece 21, the isolation film 23 and the second pole piece 22. The third direction intersects with the second direction. Figure 2 and Figure 4 , the second direction may be the Z direction shown in the figure, and the third direction may be the Y direction shown in the figure. At this time, the first direction, the second direction and the third direction are perpendicular to each other.

[0135] The pressing member 1331 is a component used to contact the first pole piece 21, the isolation membrane 23 or the second pole piece 22 to press the first pole piece 21, the isolation membrane 23 or the second pole piece 22 to the stacking platform 131. When the pressing member 1331 is working, the pressing member 1331 is in contact with the first pole piece 21, the isolation membrane 23 or the second pole piece 22, and along the second direction, the projection of the pressing member 1331 on the stacking platform 131 at least partially overlaps with the stacking platform 131. When the pressing member 1331 is not working, the pressing member 1331 avoids the first pole piece 21, the isolation membrane 23 and the second pole piece 22, so as to continue to stack the first pole piece 21 or the second pole piece 22.

[0136] The second driving mechanism 1332 is connected to the pressing member 1331 , and the second driving mechanism 1332 can drive the pressing member 1331 to move along the second direction and the third direction so as to change the pressing position of the pressing member 1331 .

[0137] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 5for Figure 2 In some embodiments, the second driving mechanism 1332 includes a first driving member 13321 and a second driving member 13322, wherein the first driving member 13321 is connected to the lamination platform 131, and the second driving member 13322 is connected to the first driving member 13321 and the pressing member 1331. The first driving member 13321 is used to drive the second driving member 13322 and the pressing member 1331 to move along the third direction, and the second driving member 13322 is used to drive the pressing member 1331 to move along the second direction. The first driving member 13321 and the second driving member 13322 can be linear electric cylinders, linear air cylinders, linear oil cylinders, etc.

[0138] By setting the second driving mechanism 1332 to drive the pressing member 1331 to move along the second direction and the third direction, it is convenient to change the position of the pressing member 1331, so that the pressing member 1331 can press the first pole piece 21, the isolation film 23 or the second pole piece 22. When the lamination platform 131 is in the first position or the second position, the second driving mechanism 1332 can drive the pressing member 1331 to move, so that the pressing member 1331 is pressed against the uppermost one of the first pole piece 21, the isolation film 23 and the second pole piece 22.

[0139] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, along the third direction, pressing members 1331 are provided on both sides of the lamination platform 131 .

[0140] The lamination mechanism includes a plurality of clamping mechanisms 133, some of which are located on one side of the lamination platform 131 along the third direction, and the other are located on the other side of the lamination platform 131 along the third direction. Thus, the lamination platform 131 is provided with clamping members 1331 on both sides along the third direction.

[0141] By arranging clamping parts 1331 on both sides of the stacking platform 131 along the third direction, it is helpful to improve the clamping effect on the first pole piece 21, the isolation membrane 23 or the second pole piece 22, and further reduce the risk of the first pole piece 21, the isolation membrane 23 or the second pole piece 22 detaching from the stacking platform 131, which is beneficial to improve the reliability of the stacking device 13, improve the stacking quality, reduce the risk of downtime, and ensure production efficiency to a certain extent.

[0142] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the pressing member 1331 includes a pressing portion 13311, and the pressing portion 13311 is used to contact the first pole piece 21, the isolation film 23 or the second pole piece 22. The pressing portion 13311 is in a sheet shape.

[0143] The pressing portion 13311 is the portion of the pressing member 1331 that contacts the first pole piece 21, the isolation membrane 23, or the second pole piece 22. The pressing portion 13311 is in a sheet shape. The thickness of the pressing portion 13311 is much smaller than its length and width. For example, the thickness of the pressing portion 13311 is less than 20% of its width, and the thickness of the pressing portion 13311 is less than 20% of its length.

[0144] By setting the pressing part 13311 to be in a sheet shape, the thickness of the pressing part 13311 along the second direction is small, so that when the lamination platform 131 switches between the first position and the second position, the redundancy of the isolation film 23 caused by the isolation film 23 covering the pressing part 13311 is small. In addition, the pressing part 13311 is in a sheet shape, and the contact area between the pressing part 13311 and the first pole piece 21, the isolation film 23 or the second pole piece 22 is large, which is not easy to cause stress concentration on the first pole piece 21, the isolation film 23 or the second pole piece 22, thereby facilitating the improvement of the lamination quality.

[0145] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the lamination device 13 includes a first smoothing mechanism, which is used to smooth the isolation film 23 when the lamination platform 131 switches between the first lamination position 138 and the second lamination position 139 .

[0146] The first smoothing mechanism is a mechanism for smoothing the isolation film 23. When the lamination platform 131 is switched between the first lamination position 138 and the second lamination position 139, the first smoothing mechanism can act on the isolation film 23, thereby smoothing the isolation film 23.

[0147] By providing a first smoothing mechanism to smooth the isolation membrane 23 when the stacking platform 131 switches between the first stacking position 138 and the second stacking position 139, the risk of wrinkling of the isolation membrane 23 is reduced, so that the isolation membrane 23 stacked with the first pole piece 21 and the second pole piece 22 is relatively flat, thereby improving the stacking quality.

[0148] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the lamination device 13 includes a frame 144, and the first smoothing mechanism includes a first smoothing member 134, and the first smoothing member 134 is used to smooth the isolation film 23. The first smoothing member 134 is connected to the frame 144, and the lamination platform 131 is movably disposed on the frame 144 along the first direction.

[0149] The first smoothing member 134 is a member of the first smoothing mechanism that directly contacts the isolation membrane 23 and smoothes the isolation membrane 23. The first smoothing member 134 can be fixedly connected to the frame 144, for example, the first smoothing member 134 can be welded or bonded to the frame 144. The first smoothing member 134 can also be detachably connected to the frame 144, for example, the first smoothing member 134 is bolted to the frame 144. The first smoothing member 134 can also be connected to the frame 144 in an adjustable position, for example, the first smoothing member 134 can be slidably connected to the frame 144.

[0150] Optionally, in some embodiments, the lamination device 13 includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are detachably connected, and the first clamping plate is connected to the frame 144. The first smoothing member 134 is disposed between the first clamping plate and the second clamping plate. When the first clamping plate and the second clamping plate are loosened, the relative position of the first smoothing member 134 and the frame 144 can be adjusted, and when the first clamping plate and the second clamping plate are clamped, the relative position of the first smoothing member 134 and the frame 144 is restricted.

[0151] The lamination platform 131 is movably disposed on the frame 144 along the first direction. When the lamination platform 131 moves from the first lamination position 138 to the second lamination position 139, or from the second lamination position 139 to the first lamination position 138, the first smoothing member 134 can smooth the isolation film 23. The risk of wrinkling of the isolation film 23 is reduced, so that the isolation film 23 stacked with the first pole piece 21 and the second pole piece 22 is relatively flat, thereby improving the lamination quality.

[0152] In some embodiments, the first smoothing member 134 is made of a flexible material.

[0153] Flexible materials refer to materials that have a certain degree of softness and flexibility relative to rigid materials and are easily deformed when subjected to external forces. Flexible materials may be polyvinyl alcohol, polyester, polyimide, polyethylene naphthalate, and the like.

[0154] The first smoothing member 134 can be fixed to the frame 144. In this case, the first smoothing member 134 is made of a flexible material. Thus, as the number of laminated layers increases, the thickness of the laminated layers also increases, and the first smoothing member 134 can be deformed to adapt to the increase in the number of laminated layers. On the other hand, the first smoothing member 134 made of a flexible material is not easy to cause damage to the isolation membrane 23, which is conducive to improving the quality of the laminated layers.

[0155] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the output unit 141 is connected to the frame 144 .

[0156] The output portion 141 may be fixedly connected to the frame 144, for example, the output portion 141 may be welded or bonded to the frame 144. The output portion 141 may also be detachably connected to the frame 144, for example, the output portion 141 is bolted to the frame 144. The output portion 141 may also be positionally adjustable to the frame 144, for example, the output portion 141 may be slidably connected to the frame 144.

[0157] The output unit 141 is connected to the frame 144 to determine the position of the output unit 141 , so that the output unit 141 can be located between the first stacking position 138 and the second stacking position 139 , so as to improve the accuracy of subsequent stacking.

[0158] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the stacking device 13 includes a flipping mechanism 135, the flipping mechanism 135 and the stacking platform 131 are arranged along a first direction, and the stacking platform 131 moves along the first direction to deliver the battery cell 20 to the flipping mechanism 135. The flipping mechanism 135 is used to drive the battery cell 20 to flip so that the isolation film 23 is wrapped around the outside of the battery cell 20.

[0159] The flipping mechanism 135 is a structure for driving the battery cell 20 to flip. The flipping mechanism 135 drives the battery cell 20 to flip, so that the insulating film can be wound around or covered on the outside of the battery cell 20. The flipping mechanism 135 and the lamination platform 131 are arranged along the first direction, so that the lamination platform 131 moves along the first direction to deliver the battery cell 20 to the flipping mechanism 135.

[0160] Optionally, the flipping mechanism 135 includes a clamping portion and a driving unit, the clamping portion is used to clamp the battery cell 20 supplied by the lamination platform 131 , the clamping portion is connected to the driving unit, and the driving unit is used to drive the clamping portion to rotate to drive the battery cell 20 to rotate.

[0161] In some embodiments, the rotation axis of the battery cell 20 is parallel to the third direction.

[0162] After the lamination platform 131 completes lamination, it can move along the first direction to supply the battery cell 20 to the flipping mechanism 135. The flipping mechanism 135 receives the battery cell 20 and drives the battery cell 20 to flip, so that the isolation film 23 is covered on the outside of the battery cell 20. On the one hand, the isolation film 23 can protect the battery cell 20. On the other hand, the isolation film 23 insulates the battery cell 20 from other components.

[0163] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5In some embodiments, the lamination device 13 includes a second smoothing mechanism 136 , and the second smoothing mechanism 136 is used to smooth at least a portion of the isolation film 23 located between the flipping mechanism 135 and the output portion 141 along the extension direction of the isolation film 23 .

[0164] The second smoothing mechanism 136 is used to smooth the isolation film 23 between the flipping mechanism 135 and the output portion 141. The isolation film 23 between the flipping mechanism 135 and the output portion 141 is smoothed by the second smoothing mechanism 136 so that this part of the isolation film 23 is not easy to wrinkle when wrapped around the outside of the battery cell 20.

[0165] By providing the second smoothing mechanism 136 to smooth at least a portion of the isolation film 23 between the flipping mechanism 135 and the output portion 141 , the insulation film covering the outside of the battery cell 20 is relatively flat and less prone to wrinkling, thereby improving the lamination quality.

[0166] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the second smoothing mechanism 136 includes a third driving mechanism 1361 and a second smoothing member 1362, and the second smoothing member 1362 is connected to the third driving mechanism 1361. The third driving mechanism 1361 is used to drive the second smoothing member 1362 to move along the extension direction of the isolation film 23, so that the second smoothing member 1362 smoothes the isolation film 23.

[0167] The second smoothing member 1362 is a component of the second smoothing mechanism 136 that directly contacts the isolation membrane 23 and smoothes the isolation membrane 23. The second smoothing member 1362 is connected to the third driving mechanism 1361 to move along the extension direction of the isolation membrane 23 driven by the third driving mechanism 1361, thereby smoothing the isolation membrane 23.

[0168] In some embodiments, the flipping mechanism 135 and the stacking platform 131 are arranged in the first direction, and the isolation membrane 23 located between the flipping mechanism 135 and the output part 141 also extends along the first direction. That is, the third driving mechanism 1361 can drive the second smoothing member 1362 to move along the first direction, thereby smoothing the isolation membrane 23 located between the flipping mechanism 135 and the output part 141.

[0169] By providing the third driving mechanism 1361, it is convenient to drive the second smoothing member 1362 to move along the extension direction of the isolation membrane 23, so as to smooth the isolation membrane 23. The structure is relatively simple and the smoothing effect is better.

[0170] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5In some embodiments, the second smoothing member 1362 is wheel-shaped, and the third driving mechanism 1361 is also used to drive the second smoothing member 1362 to rotate.

[0171] The second smoothing member 1362 is wheel-shaped, and the circumference of the second smoothing member 1362 is used to contact the isolation membrane 23 to smooth the isolation membrane 23 .

[0172] The third driving mechanism 1361 may include a plurality of driving members, some of which are used to realize the movement of the second smoothing member 1362, and the other driving members may be used to realize the rotation of the second smoothing member 1362. For example, the third driving mechanism 1361 includes a first linear cylinder, a second linear cylinder, a rack and a gear, wherein the second linear cylinder is connected to the first linear cylinder, the rack is connected to the output end of the second linear cylinder, the second smoothing member 1362 is rotatably connected to the first linear cylinder, the gear is connected to the second smoothing member 1362, and the rack is meshed with the gear. When the first linear cylinder is actuated, it can drive the second linear cylinder and the second smoothing member 1362 to move as a whole, so that the second smoothing member 1362 moves along the extension direction of the isolation membrane 23. When the second linear cylinder is actuated, it drives the rack to move, and drives the gear to rotate through the rack, thereby driving the second smoothing member 1362 to rotate.

[0173] The second smoothing member 1362 can move along the extension direction of the isolation membrane 23 and can also rotate relative to the isolation membrane 23. In this way, rolling friction is formed between the second smoothing member 1362 and the isolation membrane 23, which has a smaller friction force on the isolation membrane 23 and is less likely to cause damage to the isolation membrane 23, thereby facilitating the improvement of the lamination quality.

[0174] Please refer to Figure 6 , Figure 6 A schematic diagram of placing the first pole piece 21 on the lamination platform 131 is provided for some embodiments of the present application. In some embodiments, the isolation film unwinding mechanism 14 includes a cutter unit 145, and the cutter unit 145 is used to cut the isolation film 23.

[0175] The cutter unit 145 may include a cutter and a support member opposite to the cutter, and the isolation film 23 passes through between the cutter and the support member. When the isolation film 23 needs to be cut, the cutter moves toward the support member to cut the isolation film 23.

[0176] By providing the cutter unit 145 , after the first pole piece 21 , the isolation film 23 and the second pole piece 22 are stacked, the isolation film 23 is cut off to prepare for the stacking of the next battery cell 20 .

[0177] Please refer to Figure 6When the stacking platform 131 is at the first stacking position 138 , the first pole piece 21 can be placed on the stacking platform 131 , and one end of the isolation membrane 23 can be placed under the first pole piece 21 , and the first pole piece 21 can be pressed against the stacking platform 131 by the pressing mechanism 133 .

[0178] Please refer to Figure 7 , Figure 7 Schematic diagram of the isolation film 23 covering the first pole piece 21 provided in some embodiments of the present application. The first driving mechanism 132 drives the stacking platform 131 to move from the first stacking position 138 to the second stacking position 139. During this process, the stacking platform 131 moves from one side of the output portion 141 to the other side of the output portion 141, and the isolation film 23 gradually covers the first pole piece 21.

[0179] Please refer to Figure 8 , Figure 8 A schematic diagram of placing the second pole piece 22 on the lamination platform 131 provided for some embodiments of the present application. When the lamination platform 131 reaches the second lamination position 139, the second driving mechanism 1332 drives the pressing member 1331 to loosen the first pole piece 21 so as to place the second pole piece 22 on the first pole piece 21. At this time, there is a layer of isolation film 23 between the second pole piece 22 and the first pole piece 21. The second driving mechanism 1332 is actuated again to press the second pole piece 22 against the lamination platform 131.

[0180] Please refer to Fig. 9 , Fig. 9 Schematic diagram of the isolation film 23 covering the second pole piece 22 provided in some embodiments of the present application. The second driving mechanism 1332 drives the stacking platform 131 to move from the second stacking position 139 to the first stacking position 138. During this process, the stacking platform 131 moves from one side of the output portion 141 to the other side of the output portion 141, and the isolation film 23 gradually covers the second pole piece 22.

[0181] Please refer to Fig.10 , Fig.10 A schematic diagram of placing a second first pole piece 21 on a stacking platform 131 is provided for some embodiments of the present application. When the stacking platform 131 returns to the first stacking position 138, the second driving mechanism 1332 drives the pressing member 1331 to loosen the second pole piece 22 so as to place a new first pole piece 21 on the second pole piece 22. At this time, there is a layer of isolation film 23 between the new first pole piece 21 and the second pole piece 22. The second driving mechanism 1332 is actuated again to press the new first pole piece 21 against the stacking platform 131.

[0182] Repeat the above process to complete the lamination.

[0183] Please refer to Fig.11 and Fig.12 , Fig.11 This is a schematic structural diagram of the first transfer mechanism 11 provided in some embodiments of the present application. Fig.12 A schematic block diagram of the connection between the first detection unit 114 and the first pickup unit 113 provided for some embodiments of the present application. In some embodiments, the first transfer mechanism 11 includes a first pickup unit 113 and a first detection unit 114. The first pickup unit 113 is used to pick up the first pole piece 21, the first detection unit 114 is used to detect the number of first pole pieces 21 picked up by the first pickup unit 113 at a single time, and the first pickup unit 113 responds to the first detection unit 114. And / or the second transfer mechanism 12 includes a second pickup unit and a second detection unit. The second pickup unit is used to pick up the second pole piece 22, the second detection unit is used to detect the number of second pole pieces 22 picked up by the second pickup unit at a single time, and the second pickup unit responds to the second detection unit.

[0184] The first pickup unit 113 is a part of the first transfer mechanism 11 for picking up the first pole piece 21. In some embodiments, the first pickup unit 113 includes a first pickup portion, and the first pickup portion may include a negative pressure adsorption mechanism to pick up the first pole piece 21 by negative pressure adsorption. In other embodiments, the first pickup portion includes a clamp to pick up the first pole piece 21 by clamping.

[0185] In some embodiments, the first pickup unit 113 further includes a fourth driving member 111 and a fifth driving member 112, wherein the fifth driving member 112 connects the fourth driving member 111 and the first pickup part, the fourth driving member 111 is used to drive the fifth driving member 112 and the first pickup part to move in the first direction as a whole, and the fifth driving member 112 is used to drive the first pickup part to move in the second direction. The fourth driving member 111 and the fifth driving member 112 can be linear cylinders, linear electric cylinders, linear oil cylinders, etc. In other embodiments, the first pickup unit 113 includes a three-axis manipulator, the first pickup part is connected to the three-axis manipulator, and the first pole piece 21 is lowered and transferred to the stacking device 13 under the drive of the three-axis manipulator.

[0186] The first detection unit 114 is a detection structure for detecting the number of first pole pieces 21 picked up by the first pickup unit 113. By detecting the number of first pole pieces 21 picked up by the first pickup unit 113, it is confirmed whether the picked up first pole pieces 21 are adhered. The first detection unit 114 may be an industrial camera.

[0187] The first detection unit 114 can be directly electrically connected to the first pickup unit 113, or can be indirectly electrically connected through an intermediate component. For example, the intermediate component can be a controller, that is, the first detection unit 114 is electrically connected to the controller, and the first pickup unit 113 is electrically connected to the controller. When the first detection unit 114 detects that the number of first pole pieces 21 picked up by the first pickup unit 113 exceeds 1, the controller controls the first pickup unit 113 to transfer the picked up first pole piece 21 to the waste area or the recycling area. Otherwise, the first pole piece 21 is transferred to the stacking device 13.

[0188] The second picking unit is a part of the second transfer mechanism 12 for picking up the second pole piece 22. The structure of the second picking unit can refer to the structure of the first picking unit 113, and will not be described in detail here.

[0189] The second detection unit is a detection structure for detecting the number of second pole pieces 22 picked up by the second pickup unit. By detecting the number of second pole pieces 22 picked up by the second pickup unit, it is confirmed whether the picked up second pole pieces 22 are adhered. The second detection unit can be an industrial camera.

[0190] The second detection unit can be directly electrically connected to the second pickup unit, or indirectly electrically connected through an intermediate component. For example, the intermediate component can be a controller, that is, the second detection unit is electrically connected to the controller, and the second pickup unit is electrically connected to the controller. When the second detection unit detects that the number of second pole pieces 22 picked up by the second pickup unit exceeds 1, the controller controls the second pickup unit to transfer the picked up second pole piece 22 to the waste area or the recycling area. Otherwise, the second pole piece 22 is transferred to the stacking device 13.

[0191] A plurality of first pole pieces 21 can be stored in a silo, and two adjacent first pole pieces 21 are prone to adhesion. A first detection unit 114 is provided to detect the number of first pole pieces 21 picked up by the first pickup unit 113, so that when the first pickup unit 113 picks up a plurality of first pole pieces 21, the first pickup unit 113 is controlled to transfer the picked up first pole pieces 21 to a waste area or a recycling area. Similarly, a plurality of second pole pieces 22 can be stored in a silo, and two adjacent second pole pieces 22 are prone to adhesion. A second detection unit is provided to detect the number of second pole pieces 22 picked up by the second pickup unit, so that when the second pickup unit picks up a plurality of second pole pieces 22, the second pickup unit is controlled to transfer the picked up second pole pieces 22 to a waste area or a recycling area.

[0192] In some embodiments, the first detection unit 114 includes a first thickness detection unit, which is used to detect the thickness of the first pole piece 21 picked up by the first pickup unit 113 at a time to obtain the number of first pole pieces 21. And / or the second detection unit includes a second thickness detection unit, which is used to detect the thickness of the second pole piece 22 picked up by the second pickup unit at a time to obtain the number of second pole pieces 22.

[0193] The first pickup unit 113 responds to the first thickness detection unit. When the first thickness detection unit detects that the thickness of the first pole piece 21 is greater than a preset value, the number of first pole pieces 21 can be determined according to the ratio of the detected thickness to the preset thickness of the first pole piece 21, thereby determining that there are multiple pieces of adhesion in the picked-up first pole piece 21. The first thickness detection unit can be a laser thickness gauge, an infrared thickness gauge, etc.

[0194] Similarly, the second pickup unit responds to the second thickness detection unit. When the second thickness detection unit detects that the thickness of the second pole piece 22 is greater than a preset value, the number of second pole pieces 22 can be determined based on the ratio of the detected thickness to the preset thickness of the second pole piece 22, thereby determining that there are multiple pieces of adhesion in the picked-up second pole piece 22. The second thickness detection unit can be a laser thickness gauge, an infrared thickness gauge, etc.

[0195] The first thickness detection unit obtains the number of the first pole piece 21 by detecting the thickness of the first pole piece 21 picked up by the first pickup unit 113, thereby determining whether there are multiple pieces of the first pole piece 21 picked up by the first pickup unit 113 adhering to each other. If so, the first pickup unit 113 can respond to the first thickness detection unit and transfer the first pole piece 21 picked up by it to the waste area or the recycling area. Similarly, the second thickness detection unit obtains the number of the second pole piece 22 by detecting the thickness of the second pole piece 22 picked up by the second pickup unit, thereby determining whether there are multiple pieces of the second pole piece 22 picked up by the second pickup unit adhering to each other. If so, the second pickup unit can respond to the second thickness detection unit and transfer the second pole piece 22 picked up by it to the waste area or the recycling area.

[0196] Please refer to Fig.11 and Fig.12 In some embodiments, the lamination system 10 further includes a first detection mechanism 115, which is disposed upstream of the lamination device 13. The first detection mechanism 115 is used to detect the appearance of the first pole piece 21 and the second pole piece 22, and the first transfer mechanism 11 and the second transfer mechanism 12 both respond to the first detection mechanism 115.

[0197] The first detection mechanism 115 is a mechanism for detecting the appearance of the first electrode 21 and the second electrode 22 to confirm whether the first electrode 21 and the second electrode 22 have defects. The first detection mechanism 115 can be an industrial camera, which can confirm whether the first electrode 21 and the second electrode 22 have defects by taking pictures and comparing. The first transfer mechanism 11 can be directly electrically connected to the first detection mechanism 115, or it can be electrically connected to the first detection mechanism 115 through an intermediate component. Similarly, the second transfer mechanism 12 can be directly electrically connected to the first detection mechanism 115, or it can be electrically connected to the first detection mechanism 115 through an intermediate component.

[0198] When the first detection mechanism 115 detects that the first electrode sheet 21 transferred by the first transfer mechanism 11 has defects, the first transfer mechanism 11 responds to the first detection mechanism 115 to send the transferred first electrode sheet 21 to the waste area or the recycling area. Otherwise, the first electrode sheet 21 is transferred to the stacking device 13. When the first detection mechanism 115 detects that the second electrode sheet 22 transferred by the second transfer mechanism 12 has defects, the second transfer mechanism 12 responds to the first detection mechanism 115 to send the transferred second electrode sheet 22 to the waste area or the recycling area. Otherwise, the second electrode sheet 22 is transferred to the stacking device 13.

[0199] The first detection mechanism 115 is provided to detect the appearance of the first electrode piece 21 and the second electrode piece 22 to confirm whether the first electrode piece 21 transferred by the first transfer mechanism 11 and the second electrode piece 22 transferred by the second transfer mechanism 12 meet the standards. If they meet the standards, the first transfer mechanism 11 is allowed to transfer the first electrode piece 21 picked up by it to the stacking device 13, and the second transfer mechanism 12 is allowed to transfer the second electrode piece 22 picked up by it to the stacking device 13. If they do not meet the standards, the first transfer mechanism 11 transfers the first electrode piece 21 it transfers to the waste area or the recycling area, and the second transfer mechanism 12 transfers the second electrode piece 22 it transfers to the waste area or the recycling area.

[0200] Please refer to Fig.11 and Fig.12 In some embodiments, the lamination system 10 further includes a third dust removal mechanism 116, which is disposed downstream of the first detection mechanism 115 and upstream of the lamination device 13. The third dust removal mechanism 116 is used to remove dust from the first pole piece 21 transferred by the first transfer mechanism 11 and the second pole piece 22 transferred by the second transfer mechanism 12. The third dust removal mechanism 116 may include a dust removal brush, and the dust removal brush is used to remove dust from the first pole piece 21 and the second pole piece 22.

[0201] Please refer to Fig.13 , Fig.13A schematic diagram of the structure of the first gluing mechanism 15 provided in some embodiments of the present application. In some embodiments, the lamination system 10 includes a first gluing mechanism 15, which is disposed downstream of the lamination device 13. The first gluing mechanism 15 is used to apply finishing glue or corner glue to the battery cell 20.

[0202] The first gluing mechanism 15 is used to apply finishing glue or corner glue to the battery cell 20. The stacking system 10 further includes a third transfer mechanism 137, which is disposed downstream of the stacking device 13 and is used to transfer the battery cell 20 stacked by the stacking device 13 to the first gluing mechanism 15.

[0203] By providing the first glue sticking mechanism 15 , after the stacking device 13 completes stacking to form the battery cell 20 , a finishing glue or a corner glue is applied to the battery cell 20 to stabilize the shape of the battery cell 20 and reduce the risk of the battery cell 20 breaking.

[0204] Please refer to Fig.13 In some embodiments, the first glue sticking mechanism 15 includes a glue material unwinding mechanism 151, a glue sticking assembly 152, a material pulling mechanism 153, and a cutter mechanism 154. The glue material unwinding mechanism 151 is used to unwind the adhesive tape. The material pulling mechanism 153 is used to pull the adhesive tape to deliver the adhesive tape to the glue sticking assembly 152. The cutter mechanism 154 is used to cut off the portion of the adhesive tape between the material pulling mechanism 153 and the glue sticking assembly 152 to obtain the adhesive material. The glue sticking assembly 152 is used to stick the adhesive material to the battery cell 20.

[0205] The adhesive material unwinding mechanism 151 is a mechanism for unwinding the adhesive tape. The adhesive material unwinding mechanism 151 may include a second unwinding roller, and the second unwinding roller is used to install the adhesive tape roll. Since the material pulling mechanism 153 is provided, the adhesive tape can be unwound at a fixed length under the drive of the material pulling mechanism 153, so the second unwinding roller does not need to be provided with a driving mechanism to actively rotate.

[0206] The material pulling mechanism 153 is a mechanism for pulling the adhesive tape to realize the fixed-length unwinding of the adhesive tape. The material pulling mechanism 153 can pull out the fixed-length adhesive tape as needed. The adhesive tape pulled out by the material pulling mechanism 153 is received by the adhesive application assembly 152.

[0207] The cutter mechanism 154 can cut the portion of the adhesive tape between the material pulling mechanism 153 and the adhesive application assembly 152, thereby obtaining a fixed length of adhesive material. The cutter mechanism 154 includes a cutter and a cutter drive, wherein the cutter drive is disposed between the material pulling mechanism 153 and the adhesive application assembly 152, and the cutter drive is connected to the cutter, and the cutter drive is used to drive the cutter to approach the adhesive tape, thereby cutting the adhesive tape to form adhesive material.

[0208] The glue sticking assembly 152 transfers the cut glue material and sticks it to the battery cell 20 to complete the sticking of the finishing glue or the four-corner glue.

[0209] The material pulling mechanism 153 can pull the tape, thereby unwinding the tape, so that the unwinding can be performed according to the required amount of tape. After the material pulling mechanism 153 pulls the tape and supplies the tape to the gluing assembly 152, the cutter mechanism 154 can cut the tape between the material pulling mechanism 153 and the gluing assembly 152 to obtain the adhesive. The gluing assembly 152 can stick the adhesive to the battery cell 20 to complete the finishing glue or the four-corner glue. The first gluing mechanism 15 is used to perform the gluing operation, and the adhesive of the required length can be unrolled each time as needed, and it can be pasted to the battery cell 20. In this way, the length of the adhesive is more appropriate, which can effectively stabilize the shape of the battery cell 20, reduce the risk of collapse of the battery cell 20, and is not easy to interfere with other components.

[0210] Please refer to Fig.13 In some embodiments, the pulling mechanism 153 includes a first clamping unit 1531 and a second clamping unit 1532, both of which are used to clamp the tape. The second clamping unit 1532 can move toward or away from the first clamping unit 1531.

[0211] The first clamping unit 1531 is used to clamp the adhesive tape, and the position of the first clamping unit 1531 is fixed. The second clamping unit 1532 is also used to clamp the adhesive tape, but the second clamping unit 1532 can move toward or away from the first clamping unit 1531.

[0212] Optionally, along the extension direction of the adhesive tape, the first clamping unit 1531 is disposed upstream of the second clamping unit 1532, and the second clamping unit 1532 is disposed upstream of the adhesive application assembly 152. In this way, when the second clamping unit 1532 is released and reset, the first clamping unit 1531 can clamp the adhesive tape, reducing the risk of the adhesive tape falling or retreating to the adhesive tape unwinding mechanism.

[0213] The first clamping unit 1531 may include a clamping jaw and a first clamping jaw driving mechanism, wherein the clamping jaw is connected to the first clamping jaw driving mechanism, and the first clamping jaw driving mechanism can drive the clamping jaw to clamp or loosen so as to clamp or release the tape.

[0214] The second clamping unit 1532 may include a clamping jaw and a second clamping jaw driving mechanism, wherein the clamping jaw is connected to the second clamping jaw driving mechanism. The second clamping jaw driving mechanism can not only drive the clamping jaw to clamp or loosen, but also drive the clamping jaw to approach or move away from the first clamping unit 1531 .

[0215] When the tape needs to be unwound, the first clamping unit 1531 is released, and the second clamping unit 1532 clamps the tape and moves toward or away from the first clamping unit 1531 to pull the tape to unwind. When the first clamping unit 1531 moves into position, a fixed-length tape is unwound. At this time, both the first clamping unit 1531 and the second clamping unit 1532 clamp the tape, so that the cutting mechanism 154 can cut the tape to form a rubber material. Afterwards, the second clamping unit 1532 releases the tape and moves toward or away from the first clamping unit 1531 to complete the reset and prepare for the next material pulling.

[0216] Please refer to Fig.13 In some embodiments, the adhesive assembly 152 includes a fourth driving mechanism 1522 and an adsorbing member 1521, and the adsorbing member 1521 is used to adsorb the adhesive. The fourth driving mechanism 1522 is connected to the adsorbing member 1521, and the fourth driving mechanism 1522 is used to drive the adsorbing member 1521 to move so as to adhere the adhesive to the battery cell 20.

[0217] A plurality of adsorption holes 1311 may be provided on the adsorption member 1521 , and the adsorption holes 1311 are connected to a negative pressure mechanism, and the negative pressure mechanism is used to draw negative pressure into the adsorption holes 1311 , thereby adsorbing the adhesive tape.

[0218] The fourth driving mechanism 1522 is a mechanism for moving the adsorption member 1521, so as to adhere the adhesive adsorbed by the adsorption member 1521 to the battery cell 20. The fourth driving mechanism 1522 can be a two-axis manipulator, a three-axis manipulator, a four-axis manipulator, etc.

[0219] The adhesive material is adsorbed by the adsorbing member 1521 , which can not only pick up the adhesive material well but also not easily damage the adhesive material. The adsorbing member 1521 is driven to move by the fourth driving mechanism 1522 to transfer the adhesive material and adhere the adhesive material to the battery cell 20 .

[0220] In some embodiments, the lamination system 10 includes a plurality of first gluing mechanisms 15 , and the plurality of first gluing mechanisms 15 are all used to glue the battery cells 20 .

[0221] The lamination system 10 may include two first gluing mechanisms 15 , three first gluing mechanisms 15 , four first gluing mechanisms 15 , or more than four first gluing mechanisms 15 .

[0222] Optionally, the lamination system 10 includes five first gluing mechanisms 15 , wherein one first gluing mechanism 15 is used to apply finishing glue to the battery cell 20 , and the remaining four first gluing mechanisms 15 are used to apply glue at four corners to the battery cell 20 .

[0223] By providing a plurality of first gluing mechanisms 15 , the plurality of first gluing mechanisms 15 can perform gluing at the same time, thereby improving gluing efficiency and improving production efficiency.

[0224] Please refer to Fig.14 , Fig.14 A schematic diagram of the structure of a hot pressing device 16 provided in some embodiments of the present application. In some embodiments, the lamination system 10 includes a hot pressing device 16, which is disposed downstream of the lamination device 13. The hot pressing device 16 is used to hot press the battery cell 20.

[0225] The hot pressing device 16 is a structure for hot pressing the battery cell 20. The hot pressing device 16 is arranged downstream of the first gluing mechanism 15 to hot press the battery cell 20 with the end glue and the corner glue. The battery cell 20 located in the first gluing mechanism 15 can be picked up by a robot to the hot pressing device 16 so that the hot pressing device 16 can hot press the battery cell 20.

[0226] By providing the hot pressing device 16 to hot press the battery cell 20, on the one hand, the flatness of the battery cell 20 can be improved, so that the thickness of the battery cell 20 meets the requirements and has a high consistency. On the other hand, the wrinkles of the isolation film 23 can be reduced, the air inside the battery cell 20 can be driven out, the isolation film 23 and the first pole piece 21, the isolation film 23 and the second pole piece 22 can be closely attached together, the diffusion distance of metal ions can be shortened, and the internal resistance of the battery cell 20 can be reduced.

[0227] Please refer to Fig.14 In some embodiments, the hot pressing device 16 includes a hot pressing workbench 161, a hot pressing piece 162, and a fifth driving mechanism 163. The hot pressing workbench 161 is used to place the battery cell 20, and the hot pressing piece 162 is arranged opposite to the hot pressing workbench 161. The fifth driving mechanism 163 is connected to the hot pressing piece 162, and the fifth driving mechanism 163 is used to drive the hot pressing piece 162 to approach the battery cell 20 so that the hot pressing piece 162 hot presses the battery cell 20.

[0228] The hot pressing workbench 161 is a platform for supporting the battery cell 20. Along the second direction, the hot pressing member 162 is arranged opposite to the hot pressing workbench 161. The fifth driving mechanism 163 is connected to the hot pressing member 162 to drive the hot pressing member 162 to approach the hot pressing workbench 161, so as to perform hot pressing on the battery cell 20 located on the hot pressing workbench 161.

[0229] The fifth driving mechanism 163 may include a linear driving member, the output end of which is connected to the hot pressing member 162, and the linear driving member drives the hot pressing member 162 to move along the second direction. The linear driving member may be a linear cylinder, a linear electric cylinder, a linear oil cylinder, etc. The fifth driving mechanism 163 may also include a rotating driving member and a transmission mechanism, the rotating driving member is connected to the hot pressing member 162 through the transmission mechanism, the rotating driving member outputs a rotating motion, and the transmission mechanism converts the rotating motion output by the rotating driving member into a linear motion of the hot pressing member 162. The rotating driving member may be a motor, an internal combustion engine, etc. The transmission mechanism may be a crank slider mechanism, a screw nut mechanism, etc.

[0230] The battery cell 20 can be placed on the hot pressing workbench 161. At this time, the fifth driving mechanism 163 can drive the hot pressing member 162 to approach the battery cell 20, so as to hot press the battery cell 20. After the hot pressing is completed, the fifth driving mechanism 163 can drive the hot pressing member 162 away from the battery cell 20, so as to allow the battery cell 20 to be transferred to the next station and prepare for the next hot pressing.

[0231] In some embodiments, the hot press 162 is provided with a first probe and a second probe, and the first probe and the second probe are used to electrically connect to the first electrode piece 21 and the second electrode piece 22 of the battery cell 20 respectively when the hot press 162 hot presses the battery cell 20 .

[0232] By providing the first probe and the second probe, the first probe and the second probe can be electrically connected to the first electrode piece 21 and the second electrode piece 22 of the battery cell 20 respectively, so as to perform a resistance test on the battery cell 20 .

[0233] In some embodiments, a plurality of battery cells 20 placement positions are provided on the hot pressing platform, and a plurality of battery cells 20 can be placed at one time. The fifth driving mechanism 163 drives the hot pressing member 162 to approach the hot pressing platform, thereby hot pressing a plurality of battery cells 20 at one time.

[0234] In some embodiments, a surface of the hot pressing member 162 facing the hot pressing workbench 161 is provided with an anti-stick coating.

[0235] The “surface of the hot pressing member 162 facing the hot pressing workbench 161 ” refers to the surface of the hot pressing member 162 that is in contact with the battery cells 20 .

[0236] Anti-stick coating refers to a coating used to reduce material adhesion.

[0237] By providing an anti-stick coating on the surface of the hot pressing piece 162 facing the hot pressing workbench 161, the risk of adhesion between the hot pressing piece 162 and the battery cell 20 and the risk of other impurities adhering to the hot pressing piece 162 can be reduced, thereby reducing the risk of damage to the battery cell 20 caused by the hot pressing piece 162 when hot pressing the battery cell 20.

[0238] In some embodiments, the anti-stick coating includes a ceramic layer.

[0239] The ceramic layer is used as the anti-stick coating, which has good anti-stick effect and low cost.

[0240] Optionally, the anti-stick coating may also be a nano-antifouling fluoride coating, a diamond-like carbon coating, or the like.

[0241] In some embodiments, the lamination system 10 includes a tab welding mechanism 17 , which is disposed downstream of the lamination device 13 . The tab welding mechanism 17 is used to weld tabs on the battery cell 20 .

[0242] The tab welding mechanism 17 is a mechanism for welding tabs for the battery cell 20. The tab welding mechanism 17 is arranged downstream of the lamination device 13. In combination with some of the above embodiments, the tab welding mechanism 17 is specifically located downstream of the hot pressing device 16. The battery cell 20 can be transferred from the hot pressing device 16 to the tab welding mechanism 17 by a manipulator, so as to facilitate welding of tabs for the battery cell 20.

[0243] The tab welding mechanism 17 facilitates automatic welding of the tabs for the battery cell 20 , thereby improving the automation level of the stacking system 10 .

[0244] Please refer to Fig.15 , Fig.16 and Fig.17 , Fig.15 This is a schematic structural diagram of a first electrode tab providing mechanism 171 provided in some embodiments of the present application. Fig.16 A schematic structural diagram of the first welding mechanism 173 provided in some embodiments of the present application. Fig.17 A schematic diagram of the structure of a conveying mechanism 175 provided for some embodiments of the present application. In some embodiments, the pole tab welding mechanism 17 includes a first pole tab providing mechanism 171, a second pole tab providing mechanism, a first welding mechanism 173, a second welding mechanism and a conveying mechanism 175. The first pole tab providing mechanism 171 is arranged at the first station, and the first pole tab providing mechanism 171 is used to provide the first pole tab 24. The second pole tab providing mechanism is arranged at the second station, and the second pole tab providing mechanism is used to provide the second pole tab 25. The first welding mechanism 173 is arranged at the third station, and the first welding mechanism 173 is used to weld the first pole tab 24 and the first pole piece 21. The second welding mechanism is arranged at the fourth station, and the second welding mechanism is used to weld the second pole tab 25 and the second pole piece 22. The conveying mechanism 175 is used to convey the battery cell 20 to the first station, the second station, the third station and the fourth station.

[0245] The first tab providing mechanism 171 and the second tab providing mechanism are used to provide the first tab 24 and the second tab 25 respectively. The first tab providing mechanism 171 and the second tab providing mechanism have the same structure, and the first tab providing mechanism 171 is taken as an example for description.

[0246] The first pole tab providing mechanism 171 includes a material tape unwinding mechanism 1711, a fourth transfer mechanism 1712, a belt pulling mechanism 1713, and a cutting mechanism 1714. The material tape unwinding mechanism 1711 is used to unwind the material tape. The belt pulling mechanism 1713 is used to pull the material tape to convey the material tape to the fourth transfer mechanism 1712. The cutting mechanism 1714 is used to cut off the portion of the material tape between the belt pulling mechanism 1713 and the fourth transfer mechanism 1712 to obtain the first pole tab 24. The fourth transfer mechanism 1712 is used to transfer the first pole tab 24 to the battery cell 20.

[0247] The material tape unwinding mechanism 1711 is a mechanism for unwinding the material tape. The material tape unwinding mechanism 1711 may include a third unwinding roller, and the third unwinding roller is used to install the material tape roll. Since the belt pulling mechanism 1713 is provided, the material tape can be unwound at a fixed length under the drive of the belt pulling mechanism 1713, so the third unwinding roller does not need to be provided with a driving mechanism to actively rotate.

[0248] The belt pulling mechanism 1713 is a mechanism for pulling the material belt to realize the fixed-length unwinding of the material belt. The belt pulling mechanism 1713 can pull out the fixed-length material belt as needed. The material belt pulled out by the belt pulling mechanism 1713 is received by the fourth transfer mechanism 1712.

[0249] The cutting mechanism 1714 can cut the portion of the material strip between the drawing mechanism 1713 and the fourth transfer mechanism 1712, thereby obtaining a first pole ear 24 of a fixed length. The cutting mechanism 1714 includes a cutter and a cutting drive, which is disposed between the drawing mechanism 1713 and the fourth transfer mechanism 1712, and is connected to the cutter. The cutting drive is used to drive the cutter to approach the material strip, thereby cutting the material strip to form the first pole ear 24.

[0250] The fourth transfer mechanism 1712 transfers the cut first electrode tab 24 to the battery cell 20 .

[0251] The pulling mechanism 1713 can pull the material tape, thereby unwinding the material tape, so that the unwinding can be performed according to the required amount of the material tape. After the pulling mechanism 1713 pulls the material tape and supplies the material tape to the fourth transfer mechanism 1712, the cutting mechanism 1714 can cut the material tape between the pulling mechanism 1713 and the fourth transfer mechanism 1712, thereby obtaining the first pole tab 24. The fourth transfer mechanism 1712 can provide the first pole tab 24 to the battery cell 20. The first pole tab providing mechanism 171 is used to provide the first pole tab 24, and the material tape of the required length can be unwound each time as needed, and cut into the first pole tab 24 and provided to the battery cell 20. In this way, the length of the first pole tab 24 is more appropriate, which is beneficial to improving the quality of the battery cell 20.

[0252] Please refer to Fig.15In some embodiments, the belt pulling mechanism 1713 includes a third clamping unit 17131 and a fourth clamping unit 17132, both of which are used to clamp the material belt. The fourth clamping unit 17132 can move toward or away from the third clamping unit 17131.

[0253] The third clamping unit 17131 is used to clamp the material strip, and the third clamping unit 17131 is fixed in position. The fourth clamping unit 17132 is also used to clamp the material strip, but the fourth clamping unit 17132 can move toward or away from the third clamping unit 17131.

[0254] Optionally, along the extension direction of the material strip, the third clamping unit 17131 is disposed upstream of the fourth clamping unit 17132, and the fourth clamping unit 17132 is disposed upstream of the fourth transfer mechanism 1712. In this way, when the fourth clamping unit 17132 is released and reset, the third clamping unit 17131 can clamp the material strip, reducing the risk of the material strip falling or retreating to the material strip unwinding mechanism 1711.

[0255] The third clamping unit 17131 may include a clamping jaw and a third clamping jaw 17524 driving mechanism, wherein the clamping jaw is connected to the third clamping jaw 17524 driving mechanism, and the third clamping jaw 17524 driving mechanism may drive the clamping jaw to clamp or loosen so as to clamp or release the material strip.

[0256] The fourth clamping unit 17132 may include a clamping jaw and a fourth clamping jaw driving mechanism, the clamping jaw is connected to the fourth clamping jaw driving mechanism, and the fourth clamping jaw driving mechanism can not only drive the clamping jaw to clamp or loosen, but also drive the clamping jaw to approach or move away from the third clamping unit 17131.

[0257] When the tape needs to be unwound, the third clamping unit 17131 is released, and the fourth clamping unit 17132 clamps the tape and moves toward or away from the third clamping unit 17131 to pull the tape to unwind. When the third clamping unit 17131 moves into position, a fixed-length tape is unwound. At this time, the third clamping unit 17131 and the fourth clamping unit 17132 both clamp the tape, making it easier for the cutting mechanism 1714 to cut the tape to form the first pole ear 24. Afterwards, the fourth clamping unit 17132 releases the tape and moves away from or toward the third clamping unit 17131 to complete the reset and prepare for the next material pulling.

[0258] Please refer to Fig.15In some embodiments, the fourth transfer mechanism 1712 includes a sixth driving member 17122 and a picking member 17121, and the picking member 17121 is used to pick up the first pole tab 24. The sixth driving member 17122 is connected to the picking member 17121, and the sixth driving member 17122 is used to drive the picking member 17121 to move, so as to provide the first pole tab 24 to the battery cell 20.

[0259] The pick-up member 17121 may be provided with a plurality of adsorption holes 1311, which are connected to a negative pressure mechanism for extracting negative pressure for the adsorption holes 1311, thereby adsorbing the first pole tab 24. In other embodiments, the pick-up member 17121 may also be a clamping claw, which picks up the first pole tab 24 by clamping.

[0260] The sixth driving member 17122 is used to realize the movement of the picking member 17121, so as to provide the rubber material picked up by the picking member 17121 to the battery cell 20. The sixth driving member 17122 can be a two-axis manipulator, a three-axis manipulator, a four-axis manipulator, etc.

[0261] The first welding mechanism 173 is used to weld the first electrode tab 24 to the battery cell 20, and the second welding mechanism is used to weld the second electrode tab 25 to the battery cell 20. The first welding mechanism 173 and the second welding mechanism may be ultrasonic welding mechanisms, laser welding mechanisms, and the like.

[0262] The conveying mechanism 175 can convey the battery cell 20 to the first station, the second station, the third station and the fourth station, so that the battery cell 20 passes through the first tab providing mechanism 171, the second tab providing mechanism, the first welding mechanism 173 and the second welding mechanism. The conveying mechanism 175 can be a conveyor belt conveying mechanism 175, a roller conveying mechanism 175, etc.

[0263] The conveying mechanism 175 conveys the battery cell 20 to the first station, the second station, the third station and the fourth station. When the battery cell 20 passes through the first station, the first pole tab providing mechanism 171 provides the first pole tab 24 to the battery cell 20. When the battery cell 20 passes through the second station, the second pole tab providing mechanism provides the second pole tab 25 to the battery cell 20. When the battery cell 20 passes through the third station, the first welding mechanism 173 welds the first pole tab 24 to the battery cell 20. When the battery cell 20 passes through the fourth station, the second welding mechanism welds the second pole tab 25 to the battery cell 20, so as to complete the automatic welding of the first pole piece 21 and the battery cell 20, and the automatic welding of the second pole piece 22 and the battery cell 20, with a high degree of automation.

[0264] Please refer to Fig.15 , Fig.16 and Fig.17In some embodiments, the conveying mechanism 175 includes a turntable 1751 , and the first tab providing mechanism 171 , the second tab providing mechanism, the first welding mechanism 173 and the second welding mechanism are arranged along the circumference of the turntable 1751 .

[0265] “The first tab providing mechanism 171, the second tab providing mechanism, the first welding mechanism 173, and the second welding mechanism are arranged along the circumference of the turntable 1751” means that along the circumference of the turntable 1751, the first tab providing mechanism 171, the second tab providing mechanism, the first welding mechanism 173, and the second welding mechanism are arranged on the outside of the turntable 1751, rather than being arranged on the turntable 1751. In this way, as the turntable 1751 rotates, the battery cell 20 can pass through the first tab providing mechanism 171, the second tab providing mechanism, the first welding mechanism 173, and the second welding mechanism.

[0266] The conveying mechanism 175 includes a turntable 1751, and the battery cells 20 are conveyed to the first station, the second station, the third station, and the fourth station by the rotation of the turntable 1751. The turntable 1751 occupies a small area, and has high conveying efficiency and conveying stability.

[0267] Please refer to Fig.15 , Fig.16 , Fig.17 and Fig.18 , Fig.18 The schematic diagram of the structure of the positioning fixture 1752 provided in some embodiments of the present application. In some embodiments, the rotating disk 1751 is provided with a positioning fixture 1752, and the positioning fixture 1752 is used to position the battery cell 20, the first pole tab 24 and the second pole tab 25.

[0268] By setting the positioning fixture 1752 to position the battery cell 20, the first pole tab 24 and the second pole tab 25, the relative position of the first pole tab 24 and the battery cell 20, and the relative position of the second pole tab 25 and the battery cell 20 are not easily changed, which is beneficial to improve the welding effect.

[0269] Please refer to Fig.15 , Fig.16 , Fig.17 and Fig.18 In some embodiments, the positioning fixture 1752 includes a support table 17521, a first clamping jaw 17522, a second clamping jaw 17523, and a third clamping jaw 17524. The support table 17521 is connected to the turntable 1751. The first clamping jaw 17522, the second clamping jaw 17523, and the third clamping jaw 17524 are connected to the support table 17521. The first clamping jaw 17522 is used to position the battery cell 20 on the support table 17521. The second clamping jaw 17523 is used to position the first pole ear 24 on the battery cell 20. The third clamping jaw 17524 is used to position the second pole ear 25 on the battery cell 20.

[0270] The support platform 17521 is the installation base of the positioning fixture 1752, and the support platform 17521 is used to support the battery cell 20, the first pole tab 24 and the second pole tab 25. The support platform 17521 is connected to the rotating disk 1751 so that the positioning fixture 1752 rotates with the rotation of the rotating disk 1751.

[0271] The first clamping jaw 17522 may be rotatably connected to the support platform 17521, so that the battery cell 20 can be clamped and released by rotating the first clamping jaw 17522. The first clamping jaw 17522 may also be slidably connected to the support platform 17521, so that the battery cell 20 can be clamped and released by sliding the first clamping jaw 17522. In addition, a driving mechanism may be provided to drive the first clamping jaw 17522 to move, so that the first clamping jaw 17522 can automatically clamp and release the battery cell 20.

[0272] The second clamping jaw 17523 may be rotatably connected to the support platform 17521, so that the first pole tab 24 can be clamped and released by rotating the second clamping jaw 17523, so that the first pole tab 24 is positioned in the battery cell 20. The second clamping jaw 17523 may also be slidably connected to the support platform 17521, so that the first pole tab 24 can be clamped and released by sliding the second clamping jaw 17523, so that the first pole tab 24 is positioned in the battery cell 20. In addition, a driving mechanism may be provided to drive the second clamping jaw 17523 to move, so that the second clamping jaw 17523 can automatically clamp and release the first pole tab 24.

[0273] The third clamping jaw 17524 may be rotatably connected to the support platform 17521, so that the second pole tab 25 can be clamped and released by rotating the third clamping jaw 17524, so that the third pole tab 25 is positioned in the battery cell 20. The third clamping jaw 17524 may also be slidably connected to the support platform 17521, so that the second pole tab 25 can be clamped and released by sliding the third clamping jaw 17524, so that the second pole tab 25 is positioned in the battery cell 20. In addition, a driving mechanism may be provided to drive the third clamping jaw 17524 to move, so that the third clamping jaw 17524 can automatically clamp and release the second pole tab 25.

[0274] The support table 17521 is connected to the turntable 1751, and the turntable 1751 can transport the support table 17521 to the first station, the second station, the third station, and the fourth station. The first clamp 17522 can position the battery cell 20 on the support table 17521, so that the relative position of the battery cell 20 and the support table 17521 is not easy to change. The second clamp 17523 can position the first pole ear 24 on the battery cell 20, so that the relative position of the first pole ear 24 and the battery cell 20 is not easy to change. The third clamp 17524 can position the second pole ear 25 on the battery cell 20, so that the relative position of the second pole ear 25 and the battery cell 20 is not easy to change, which is conducive to improving the welding effect.

[0275] Please refer to Fig.15 , Fig.16 , Fig.17 and Fig.18 In some embodiments, the first welding mechanism 173 includes a first welding head 1731 and a first dust removal mechanism 1732. The first welding head 1731 is used to weld the first pole tab 24 and the first pole piece 21, and the first dust removal mechanism 1732 is used to remove dust from the first welding head 1731. And / or the second welding mechanism includes a second welding head and a second dust removal mechanism. The second welding head is used to weld the second pole tab 25 and the second pole piece 22, and the second dust removal mechanism is used to remove dust from the second welding head.

[0276] The first welding head 1731 is a welding component for welding the first pole tab 24 and the first pole piece 21. The first welding head 1731 may be a laser welding head, an ultrasonic welding head, etc. The first welding mechanism 173 may further include a seventh driving member 1733, which is connected to the first welding head 1731 to drive the first welding head 1731 to approach the battery cell 20, thereby welding the first pole tab 24 to the first pole piece 21.

[0277] The first dust removal mechanism 1732 is a mechanism for removing dust from the first welding head 1731. The first dust removal mechanism 1732 may include a dust removal member 17321 and a sixth driving mechanism 17322. The dust removal member 17321 is used to remove dust from the first welding head 1731. The sixth driving mechanism 17322 is connected to the dust removal member 17321. The sixth driving mechanism 17322 is used to drive the dust removal member 17321 to move closer to or away from the first welding head 1731. The dust removal member 17321 may be a dust removal brush, an electrostatic dust collector, or the like.

[0278] The structure of the second welding mechanism may be the same as that of the first welding mechanism 173 , and will not be described in detail herein.

[0279] By setting the first dust removal mechanism 1732 to remove dust from the first welding head 1731, the first welding head 1731 is kept clean before each welding of the first pole tab 24 and the battery cell 20, which is conducive to improving the welding effect. Similarly, by setting the second dust removal mechanism to remove dust from the second welding head, the second welding head is kept clean before each welding of the second pole tab 25 and the battery cell 20, which is conducive to improving the welding effect.

[0280] In some embodiments, the tab welding mechanism 17 further includes a second gluing mechanism, which is disposed at the fifth station, and the conveying mechanism 175 is also used to convey the battery cell 20 to the fifth station. The second gluing mechanism is used to glue at the welding position between the first tab 24 and the first pole piece 21 and the welding position between the second tab 25 and the second pole piece 22.

[0281] The second gluing mechanism is a mechanism for gluing the welding position of the first pole tab 24 and the first pole piece 21, and the welding position of the second pole tab 25 and the second pole piece 22. The second gluing mechanism is arranged at the fifth station, downstream of the second welding mechanism. After the second welding mechanism completes welding, the conveying mechanism 175 conveys the battery cell 20 to the fifth station, so that the second gluing mechanism can glue the welding position of the first pole tab 24 and the first pole piece 21, and the welding position of the second pole tab 25 and the second pole piece 22.

[0282] The structure of the second gluing mechanism may be the same as that of the first gluing mechanism 15 , and will not be described in detail herein.

[0283] The conveying mechanism 175 can convey the battery cell 20 to the first station, the second station, the third station, the fourth station and the fifth station. At the third station, the first welding mechanism 173 welds the first pole piece 21 to the battery cell 20. At the fourth station, the second welding mechanism welds the second pole piece 22 to the battery cell 20. At the fifth station, the second glue sticking mechanism can glue the welding position of the first pole tab 24 and the first pole piece 21 and the welding position of the second pole tab 25 and the second pole piece 22 to protect the welding position.

[0284] In some embodiments, the tab welding mechanism 17 includes a second detection mechanism, which is disposed at the sixth station. The conveying mechanism 175 is also used to convey the battery cell 20 to the sixth station, and the second detection mechanism is used to detect the appearance of the battery cell 20.

[0285] The second inspection mechanism is used to inspect the appearance of the battery cell 20 to confirm whether the battery cell 20 has defects. The second inspection mechanism can be an industrial camera, which takes pictures and compares them to confirm whether the battery cell 20 has defects. Before the fifth station, the battery cell 20 has been manufactured, and the second inspection mechanism is used to inspect the appearance of the manufactured battery cell 20 to confirm whether the battery cell 20 is qualified.

[0286] The conveying mechanism 175 can convey the battery cell 20 to the first station, the second station, the third station, the fourth station, the fifth station and the sixth station. At the third station, the first welding mechanism 173 welds the first pole piece 21 to the battery cell 20, and at the fourth station, the second welding mechanism welds the second pole piece 22 to the battery cell 20. At the fifth station, the second gluing mechanism can glue the welding position of the first pole tab 24 and the first pole piece 21, and the welding position of the second pole tab 25 and the second pole piece 22 to protect the welding position. At the sixth station, the second inspection mechanism can inspect the appearance of the battery cell 20 after welding and gluing to confirm whether the battery cell 20 meets the standard.

[0287] Please refer to Figure 1 In some embodiments, the lamination system 10 includes a first gluing mechanism 15, a hot pressing device 16, and a tab welding mechanism 17. The first gluing mechanism 15 is used to apply finishing glue or four-corner glue to the battery cell 20. The hot pressing device 16 is used to hot press the battery cell 20. The tab welding mechanism 17 is used to weld the tabs on the battery cell 20. The first gluing mechanism 15 is arranged downstream of the lamination device 13, the hot pressing device 16 is arranged downstream of the first gluing mechanism 15, and the tab welding mechanism 17 is arranged downstream of the hot pressing device 16.

[0288] The first gluing mechanism 15 can apply finishing glue or four-corner glue to the stacked battery cell 20, the hot pressing device 16 can hot press the battery cell 20 after gluing, and the tab welding mechanism 17 can weld the first tab 24 and the second tab 25 to the hot-pressed battery cell 20 to produce the final battery cell 20, with a high degree of automation.

[0289] According to some embodiments of this application, please refer to Figures 1 to 18 .

[0290] The embodiment of the present application provides a stacking system 10, which includes a first transfer mechanism 11, a second transfer mechanism 12, an isolation film unwinding mechanism 14, and a stacking device 13. The first transfer mechanism 11 is used to transfer the first pole piece 21. The second transfer mechanism 12 is used to transfer the second pole piece 22, and the polarity of the second pole piece 22 is opposite to that of the first pole piece 21. The isolation film unwinding mechanism 14 is used to unwind the isolation film 23. The stacking device 13 is used to receive the first pole piece 21, the isolation film 23, and the second pole piece 22, and stack the first pole piece 21, the isolation film 23, and the second pole piece 22 to form a battery cell 20. The first transfer mechanism 11, the second transfer mechanism 12 and the isolation film unwinding mechanism 14 of the stacking system 10 can respectively provide the first pole sheet 21, the second pole sheet 22 and the isolation film 23 to the stacking device 13. The stacking device 13 can stack the first pole sheet 21, the isolation film 23 and the second pole sheet 22 to form a battery cell 20, thereby realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0291] The isolation film unwinding mechanism 14 has an output portion 141 for outputting the isolation film 23. The stacking device 13 includes a stacking platform 131 and a first driving mechanism 132. The stacking platform 131 has a first stacking position 138 and a second stacking position 139. Along the first direction, the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output portion 141. The stacking platform 131 is used to receive the first pole piece 21 at the first stacking position 138 and the second pole piece 22 at the second stacking position 139. The first driving mechanism 132 is used to drive the stacking platform 131 to move along the first direction so that the stacking platform 131 switches between the first stacking position 138 and the second stacking position 139. The first driving mechanism 132 can drive the stacking platform 131 to switch between the first stacking position 138 and the second stacking position 139. When the stacking platform 131 is located at the first stacking position 138, the stacking platform 131 is located at one side of the output portion 141 along the first direction. When the stacking platform 131 is located at the second stacking position 139, the stacking platform 131 is located at the other side of the output part 141 along the first direction. The stacking platform 131 can receive the first pole piece 21 at the first stacking position 138, and one end of the isolation film 23 can be set on the stacking platform 131. In the process of switching the stacking platform 131 from the first position to the second position, since the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output part 141, the isolation film 23 will gradually cover the first pole piece 21. The stacking platform 131 reaches the second position, receives the second pole piece 22, and then switches from the second position to the first position. In the process of switching the stacking platform 131 from the second position to the first position, since the first stacking position 138 and the second stacking position 139 are respectively located on both sides of the output part 141, the isolation film 23 will gradually cover the second pole piece 22, and the stacking platform 131 reaches the first position, and can receive the first pole piece 21 again. As the lamination platform 131 switches back and forth between the first position and the second position, the first pole piece 21 , the isolation film 23 and the second pole piece 22 are gradually stacked, thereby forming the battery cell 20 .

[0292] The lamination device 13 includes a clamping mechanism 133, which is arranged on the lamination platform 131, and is used to clamp the first pole piece 21, the isolation membrane 23 or the second pole piece 22 to the lamination platform 131. By setting the clamping mechanism 133, during the switching of the lamination platform 131 between the first position and the second position, the first pole piece 21, the isolation membrane 23 or the second pole piece 22 are clamped to the lamination platform 131, thereby reducing the risk of the first pole piece 21, the isolation membrane 23 or the second pole piece 22 being separated from the lamination platform 131, which is beneficial to improving the reliability of the lamination device 13, improving the lamination quality, reducing the risk of downtime, and ensuring production efficiency to a certain extent.

[0293] The lamination system 10 includes a first gluing mechanism 15, which is disposed downstream of the lamination device 13 and is used to apply finishing glue or corner glue to the battery cell 20. By providing the first gluing mechanism 15, after the lamination device 13 completes lamination to form the battery cell 20, finishing glue or corner glue is applied to the battery cell 20 to stabilize the shape of the battery cell 20 and reduce the risk of collapse of the battery cell 20.

[0294] The first gluing mechanism 15 includes a glue material unwinding mechanism 151, a glue assembly 152, a material pulling mechanism 153 and a cutter mechanism 154. The glue material unwinding mechanism 151 is used to unwind the tape. The material pulling mechanism 153 is used to pull the tape to convey the tape to the gluing assembly 152. The cutter mechanism 154 is used to cut off the portion of the tape between the material pulling mechanism 153 and the gluing assembly 152 to obtain the glue material, and the gluing assembly 152 is used to stick the glue material to the battery cell 20. The material pulling mechanism 153 can pull the tape to unwind the tape, so that the unwinding can be performed according to the required amount of tape. After the material pulling mechanism 153 pulls the tape and supplies the tape to the gluing assembly 152, the cutter mechanism 154 can cut the tape between the material pulling mechanism 153 and the gluing assembly 152 to obtain the glue material. The gluing assembly 152 can stick the glue material to the battery cell 20 to complete the end glue or the four-corner glue. The first gluing mechanism 15 is used to perform the gluing operation, and the glue material of the required length can be unwound each time as needed, and the glue material can be pasted to the battery cell 20. In this way, the length of the glue material is more appropriate, which can effectively stabilize the shape of the battery cell 20, reduce the risk of collapse of the battery cell 20, and is not easy to interfere with other components.

[0295] The lamination system 10 includes a hot pressing device 16, which is arranged downstream of the lamination device 13, and is used to hot press the battery cell 20. By setting the hot pressing device 16 to hot press the battery cell 20, on the one hand, the flatness of the battery cell 20 can be improved, so that the thickness of the battery cell 20 meets the requirements and has a high consistency. On the other hand, it can reduce the wrinkles of the isolation film 23, drive out the air inside the battery cell 20, make the isolation film 23 and the first pole piece 21, the isolation film 23 and the second pole piece 22 closely attached together, shorten the diffusion distance of metal ions, and reduce the internal resistance of the battery cell 20.

[0296] The lamination system 10 includes a tab welding mechanism 17, which is disposed downstream of the lamination device 13 and is used to weld tabs on the battery cell 20. The tab welding mechanism 17 facilitates automatic welding of tabs for the battery cell 20, thereby improving the automation of the lamination system 10.

[0297] The tab welding mechanism 17 includes a first tab providing mechanism 171, a second tab providing mechanism, a first welding mechanism 173, a second welding mechanism and a conveying mechanism 175. The first tab providing mechanism 171 is arranged at the first station, and the first tab providing mechanism 171 is used to provide the first tab 24. The second tab providing mechanism is arranged at the second station, and the second tab providing mechanism is used to provide the second tab 25. The first welding mechanism 173 is arranged at the third station, and the first welding mechanism 173 is used to weld the first tab 24 and the first pole piece 21. The second welding mechanism is arranged at the fourth station, and the second welding mechanism is used to weld the second tab 25 and the second pole piece 22. The conveying mechanism 175 is used to convey the battery cell 20 to the first station, the second station, the third station and the fourth station. The conveying mechanism 175 conveys the battery cell 20 to the first station, the second station, the third station and the fourth station, and when the battery cell 20 passes through the first station, the first tab providing mechanism 171 provides the first tab 24 to the battery cell 20. When the battery cell 20 passes through the second station, the second pole tab 25 providing mechanism provides the second pole tab 25 to the battery cell 20. When the battery cell 20 passes through the third station, the first welding mechanism 173 welds the first pole tab 24 to the battery cell 20. When the battery cell 20 passes through the fourth station, the second welding mechanism welds the second pole tab 25 to the battery cell 20 to complete the automatic welding of the first pole piece 21 and the battery cell 20, and the automatic welding of the second pole piece 22 and the battery cell 20, with a high degree of automation.

[0298] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lamination system, characterized in that: include: A first transfer mechanism, used for transferring the first pole piece; A second transfer mechanism, used for transferring a second pole piece, wherein the second pole piece has a polarity opposite to that of the first pole piece; An isolation film unwinding mechanism, used for unwinding the isolation film; The stacking device is used to receive the first pole piece, the isolation membrane and the second pole piece, and stack the first pole piece, the isolation membrane and the second pole piece to form a battery cell.

2. The lamination system according to claim 1, characterized in that: The isolation film unwinding mechanism has an output portion for outputting the isolation film; The lamination device comprises: A lamination platform, having a first lamination position and a second lamination position, wherein the first lamination position and the second lamination position are respectively located on both sides of the output portion along a first direction; the lamination platform is used to receive the first pole piece at the first lamination position and receive the second pole piece at the second lamination position; The first driving mechanism is used to drive the stacking platform to move along the first direction so that the stacking platform switches between the first stacking position and the second stacking position.

3. The lamination system according to claim 2, characterized in that: The lamination device comprises a pressing mechanism, which is arranged on the lamination platform and is used to press the first pole piece, the isolation membrane or the second pole piece onto the lamination platform.

4. The lamination system according to claim 3, characterized in that: The clamping mechanism comprises: A pressing member, used for pressing the first pole piece, the isolation membrane or the second pole piece onto the lamination platform; A second driving mechanism is connected to the clamping member, and the second driving mechanism is used to drive the clamping member to move along a second direction and a third direction, the second direction is the stacking direction of the first pole piece, the isolation membrane and the second pole piece, the third direction intersects with the second direction, and the first direction intersects with the plane where the second direction and the third direction are located.

5. The lamination system according to claim 4, characterized in that: Along the third direction, the pressing members are arranged on both sides of the lamination platform.

6. The lamination system according to claim 4, characterized in that: The pressing member includes a pressing portion, which is used to contact the first pole piece, the isolation membrane or the second pole piece, and the pressing portion is in a sheet shape.

7. The lamination system according to claim 2, characterized in that: The lamination device comprises a first smoothing mechanism, and the first smoothing mechanism is used for smoothing the isolation film when the lamination platform switches between the first lamination position and the second lamination position.

8. The lamination system according to claim 7, characterized in that: The lamination device comprises a frame, the first smoothing mechanism comprises a first smoothing member, the first smoothing member is used to smooth the isolation film, the first smoothing member is connected to the frame, and the lamination platform is movably arranged on the frame along the first direction.

9. The lamination system according to claim 8, characterized in that: The first smoothing member is made of a flexible material.

10. The lamination system according to claim 8, characterized in that: The output part is connected to the frame.

11. The lamination system according to claim 2, characterized in that: The stacking device includes a flipping mechanism, wherein the flipping mechanism and the stacking platform are arranged along the first direction, and the stacking platform can move along the first direction to transport the battery cell to the flipping mechanism, and the flipping mechanism is used to drive the battery cell to flip so that the isolation film is covered on the outside of the battery cell.

12. The lamination system according to claim 11, characterized in that: The lamination device comprises a second smoothing mechanism, and the second smoothing mechanism is used to smooth at least a portion of the isolation film located between the turnover mechanism and the output portion along the extension direction of the isolation film.

13. The lamination system according to claim 12, characterized in that: The second smoothing mechanism includes a third driving mechanism and a second smoothing member, the second smoothing member is connected to the third driving mechanism, and the third driving mechanism is used to drive the second smoothing member to move along the extension direction of the isolation membrane so that the second smoothing member smoothes the isolation membrane.

14. The lamination system according to claim 13, characterized in that: The second smoothing member is wheel-shaped, and the third driving mechanism is also used to drive the second smoothing member to rotate.

15. The lamination system according to claim 1, characterized in that: The isolation film unwinding mechanism comprises a cutter unit, and the cutter unit is used for cutting the isolation film.

16. The lamination system according to claim 1, characterized in that: The first transfer mechanism includes a first picking unit and a first detection unit, the first picking unit is used to pick up the first pole piece, the first detection unit is used to detect the number of the first pole pieces picked up by the first picking unit at a single time, and the first picking unit responds to the first detection unit; and / or The second transfer mechanism includes a second picking unit and a second detection unit, the second picking unit is used to pick up the second pole piece, the second detection unit is used to detect the number of the second pole pieces picked up by the second picking unit at a single time, and the second picking unit responds to the second detection unit.

17. The lamination system according to claim 16, characterized in that: The first detection unit includes a first thickness detection unit, and the first thickness detection unit is used to detect the thickness of the first pole piece picked up by the first picking unit at a single time to obtain the number of the first pole pieces; and / or The second detection unit includes a second thickness detection unit, and the second thickness detection unit is used to detect the thickness of the second pole pieces picked up by the second picking unit in a single time to obtain the number of the second pole pieces.

18. The lamination system according to claim 1, characterized in that: The lamination system further comprises a first detection mechanism, which is arranged upstream of the lamination device and is used to detect the appearance of the first pole piece and the second pole piece. The first transfer mechanism and the second transfer mechanism both respond to the first detection mechanism.

19. The lamination system according to any one of claims 1 to 18, characterized in that: The lamination system comprises a first gluing mechanism, which is arranged downstream of the lamination device and is used for applying finishing glue or four-corner glue to the battery cell.

20. The lamination system according to claim 19, characterized in that: The first glue sticking mechanism comprises: Adhesive material unwinding mechanism, used for unwinding adhesive tape; Glue-on components; A material pulling mechanism, used for pulling the adhesive tape to convey the adhesive tape to the adhesive application assembly; The cutter mechanism is used to cut off the portion of the tape between the material pulling mechanism and the glue sticking assembly to obtain glue, and the glue sticking assembly is used to stick the glue to the battery cell.

21. The lamination system according to claim 20, characterized in that: The material pulling mechanism includes a first clamping unit and a second clamping unit, both of which are used to clamp the adhesive tape, and the second clamping unit can move toward or away from the first clamping unit.

22. The lamination system according to claim 20, characterized in that: The glue sticking assembly includes a fourth driving mechanism and an adsorption member, the adsorption member is used to adsorb the glue, the fourth driving mechanism is connected to the adsorption member, and the fourth driving mechanism is used to drive the adsorption member to move so as to stick the glue to the battery cell.

23. The lamination system according to claim 20, characterized in that: The lamination system includes a plurality of the first gluing mechanisms, and the plurality of the first gluing mechanisms are all used for gluing the battery cells.

24. The lamination system according to any one of claims 1 to 18, characterized in that: The lamination system comprises a hot pressing device, which is arranged downstream of the lamination device and is used for hot pressing the battery core.

25. The lamination system according to claim 24, characterized in that: The hot pressing device comprises: A hot pressing workbench, used for placing the battery core; A hot pressing part, arranged opposite to the hot pressing workbench; A fifth driving mechanism is connected to the hot pressing member, and the fifth driving mechanism is used to drive the hot pressing member to approach the battery core so that the hot pressing member hot presses the battery core.

26. The lamination system according to claim 25, characterized in that: The hot pressing member is provided with a first probe and a second probe, and the first probe and the second probe are used to be electrically connected to the first pole piece and the second pole piece of the battery cell respectively when the hot pressing member hot presses the battery cell.

27. The lamination system according to claim 25, characterized in that: The surface of the hot pressing piece facing the hot pressing workbench is provided with an anti-stick coating.

28. The lamination system according to claim 27, characterized in that: The anti-stick coating includes a ceramic layer.

29. The lamination system according to any one of claims 1 to 18, characterized in that: The lamination system comprises a tab welding mechanism, which is arranged downstream of the lamination device and is used for welding tabs on the battery core.

30. The lamination system according to claim 29, characterized in that: The tab welding mechanism comprises: A first electrode tab providing mechanism is disposed at a first workstation, wherein the first electrode tab providing mechanism is used to provide a first electrode tab; A second pole lug providing mechanism is disposed at the second workstation, and the second pole lug providing mechanism is used to provide a second pole lug; A first welding mechanism, disposed at a third workstation, the first welding mechanism being used for welding the first pole lug and the first pole piece; A second welding mechanism, disposed at a fourth station, the second welding mechanism being used for welding the second pole ear and the second pole piece; A conveying mechanism is used to convey the battery core to the first station, the second station, the third station and the fourth station.

31. The lamination system according to claim 30, characterized in that: The conveying mechanism includes a turntable, and the first tab providing mechanism, the second tab providing mechanism, the first welding mechanism, and the second welding mechanism are arranged along the circumference of the turntable.

32. The lamination system according to claim 31, characterized in that: A positioning fixture is provided on the turntable, and the positioning fixture is used to position the battery cell, the first pole lug and the second pole lug.

33. The lamination system according to claim 32, characterized in that: The positioning fixture includes a support platform, a first jaw, a second jaw and a third jaw, the support platform is connected to the turntable, the first jaw, the second jaw and the third jaw are connected to the support platform, the first jaw is used to position the battery cell on the support platform, the second jaw is used to position the first pole ear on the battery cell, and the third jaw is used to position the second pole ear on the battery cell.

34. The lamination system according to claim 30, characterized in that: The first welding mechanism comprises a first welding head and a first dust removal mechanism, the first welding head is used to weld the first pole ear and the first pole piece, and the first dust removal mechanism is used to remove dust from the first welding head; and / or The second welding mechanism includes a second welding head and a second dust removal mechanism, the second welding head is used for welding the second pole ear and the second pole piece, and the second dust removal mechanism is used for removing dust from the second welding head.

35. The lamination system according to claim 30, characterized in that: The pole tab welding mechanism also includes a second gluing mechanism, which is arranged at the fifth workstation. The conveying mechanism is also used to convey the battery cell to the fifth workstation. The second gluing mechanism is used to glue at the welding position between the first pole tab and the first pole sheet and the welding position between the second pole tab and the second pole sheet.

36. The lamination system according to claim 35, characterized in that: The tab welding mechanism includes a second detection mechanism, which is disposed at a sixth station. The conveying mechanism is also used to convey the battery cell to the sixth station, and the second detection mechanism is used to detect the appearance of the battery cell.

37. The lamination system according to any one of claims 1 to 18, characterized in that: The stacking system includes a first gluing mechanism, a hot pressing device and a tab welding mechanism. The first gluing mechanism is used to apply finishing glue or corner glue to the battery cell, the hot pressing device is used to hot press the battery cell, and the tab welding mechanism is used to weld the tabs on the battery cell. The first gluing mechanism is arranged downstream of the stacking device, the hot pressing device is arranged downstream of the first gluing mechanism, and the tab welding mechanism is arranged downstream of the hot pressing device.

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