Lamination system

Abstract

The present application relates to the field of batteries, and provides a lamination system. The lamination system comprises a first transfer mechanism, a second transfer mechanism, a separator unwinding mechanism, and a laminating device. The first transfer mechanism is used for transferring a first electrode sheet. The second transfer mechanism is used for transferring a second electrode sheet. The polarity of the second electrode sheet is opposite to that of the first electrode sheet. The separator unwinding mechanism is used for unwinding a separator. The laminating device is used for receiving the first electrode sheet, the separator, and the second electrode sheet, and laminating the first electrode sheet, the separator, and the second electrode sheet to form a battery cell. In the lamination system, the first transfer mechanism, the second transfer mechanism, and the separator unwinding mechanism can respectively provide the first electrode sheet, the second electrode sheet, and the separator for the laminating device, and the laminating device can laminate the first electrode sheet, the separator, and the second electrode sheet to form a battery cell, achieving automated lamination, and facilitating the improvement of the lamination quality and the production efficiency.

Description

Lamination system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application entitled “Stacking System” filed on September 4, 2023 (application number: 202311132272.2), the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of batteries, and in particular to a stacking system. Background Art

[0004] Batteries are widely used in new energy applications, such as electric vehicles and new energy vehicles. These have become a new trend in the automotive industry. Electrode assemblies are the components within battery cells where electrochemical reactions occur. Electrode assemblies include wound electrode assemblies and laminated electrode assemblies. Currently, the production efficiency of laminated electrode assemblies is relatively low.

[0005] Summary of the Invention

[0006] 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 laminated electrode assemblies in the related art.

[0007] 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 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.

[0008] 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 electrode sheet, the second electrode sheet and the isolation film to the stacking device. The stacking device can stack the first electrode sheet, the isolation film and the second electrode sheet to form a battery cell, thereby realizing automated stacking, which is beneficial to improving the stacking quality and production efficiency.

[0009] 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.

[0010] In the above technical solution, the first drive mechanism is capable of driving the stacking platform to switch between a first stacking position and a second stacking position. When the stacking platform is in the first stacking position, it is located on one side of the output section along the first direction. When the stacking platform is in the second stacking position, it is located on the other side of the output section along the first direction. The stacking platform is capable of receiving the first electrode sheet in the first stacking position, and one end of the isolation film can be positioned on the stacking platform. During the stacking platform's switching from the first position to the second position, since the first and second stacking positions are located on opposite sides of the output section, the isolation film gradually covers the first electrode sheet. The stacking platform reaches the second position, receives the second electrode sheet, and then switches from the second position to the first position. During the stacking platform's switching from the second position to the first position, since the first and second stacking positions are located on opposite sides of the output section, the isolation film gradually covers the second electrode sheet. The stacking platform then returns to the first position and can receive the first electrode sheet again. As the stacking platform switches back and forth between the first and second positions, the first electrode sheet, isolation film, and second electrode sheet are gradually stacked, thereby forming a battery cell.

[0011] As an optional technical solution of an embodiment of the present application, the lamination device includes 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.

[0012] In the above technical solution, by setting a clamping mechanism, the first pole piece, the isolation membrane or the second pole piece is pressed against the stacking platform during the switching of the stacking platform between the first position and the second position, 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 shutdown, and ensuring production efficiency to a certain extent.

[0013] As an optional technical solution of an embodiment of the present application, the clamping mechanism includes a clamping member and a second driving mechanism, the clamping member 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 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.

[0014] In the above technical solution, a second drive mechanism is provided to drive the pressing member to move in the second and third directions, thereby facilitating the change of 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 lamination platform is in the first position or the second position, the second drive mechanism can drive the pressing member to move, thereby causing the pressing member to press the uppermost one of the first pole piece, the isolation membrane, and the second pole piece.

[0015] As an optional technical solution of the embodiment of the present application, the pressing members are provided on both sides of the stacking platform along the third direction.

[0016] 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, further reduce the risk of the first pole piece, the isolation membrane or the second pole piece detaching from the stacking platform, and help improve the reliability of the stacking device, improve the stacking quality, reduce the risk of downtime, and ensure production efficiency to a certain extent.

[0017] 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.

[0018] In the above technical solution, by configuring the pressing portion in a sheet shape, the thickness of the pressing portion along the second direction is reduced. Thus, during the switching of the lamination platform between the first and second positions, the isolation diaphragm covering the pressing portion, resulting in less redundancy of the isolation diaphragm, is reduced. Furthermore, the sheet shape of the pressing portion provides a larger contact area with the first pole piece, isolation diaphragm, or second pole piece, thus minimizing stress concentration on the first pole piece, isolation diaphragm, or second pole piece, thereby improving lamination quality.

[0019] As an optional technical solution of an embodiment of the present application, the stacking device includes a first smoothing mechanism, which is used to smooth the isolation membrane when the stacking platform switches between the first stacking position and the second stacking position.

[0020] 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 and making the isolation membrane stacked with the first pole piece and the second pole piece smoother, thereby improving the stacking quality.

[0021] As an optional technical solution of an embodiment of the present application, the lamination 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 lamination platform is movably arranged on the frame along the first direction.

[0022] In the above technical solution, the lamination platform is movably mounted on the frame along a first direction. When the lamination platform moves from the first lamination position to the second lamination position, or vice versa, the first smoothing member can smooth the isolation membrane. This reduces the risk of wrinkling of the isolation membrane, ensures that the isolation membrane stacked with the first and second pole pieces is relatively flat, and thus improves the quality of the lamination.

[0023] As an optional technical solution of the embodiment of the present application, the first smoothing member is made of a flexible material.

[0024] 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. This allows the first smoothing member to deform as the number of laminate layers increases, thereby increasing the thickness of the laminates. Furthermore, the flexible material of the first smoothing member is less likely to damage the isolation membrane, thereby improving the quality of the laminates.

[0025] As an optional technical solution of the embodiment of the present application, the output unit is connected to the rack.

[0026] In the above technical solution, the output part is connected to the frame to determine the position of the output part, so that the output part can be located between the first stacking position and the second stacking position, so as to improve the accuracy of subsequent stacking.

[0027] 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 membrane is covered on the outside of the battery cell.

[0028] 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.

[0029] As an optional technical solution of an embodiment of the present application, the lamination device includes a second smoothing mechanism, which 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.

[0030] 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 less prone to wrinkling, thereby improving the quality of the lamination.

[0031] 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.

[0032] In the above technical solution, by providing a third driving mechanism, the second smoothing member is driven to move along the extension direction of the isolation membrane, thereby smoothing the isolation membrane. The structure is relatively simple and the smoothing effect is good.

[0033] As an optional technical solution of the embodiment of the present application, the second smoothing member is wheel-shaped, and the third driving mechanism is further used to drive the second smoothing member to rotate.

[0034] In the above technical solution, the second smoothing member can simultaneously move along the extension direction of the isolation diaphragm and rotate relative to the isolation diaphragm. This creates rolling friction between the second smoothing member and the isolation diaphragm, which reduces friction and is less likely to damage the isolation diaphragm, thereby improving lamination quality.

[0035] 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.

[0036] In the above technical solution, by providing a cutter unit, after the first pole piece, the isolation membrane and the second pole piece are stacked, the isolation membrane is cut off to prepare for the stacking of the next battery cell.

[0037] 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 in 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 in a single time, and the second picking unit responds to the second detection unit.

[0038] 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.

[0039] 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.

[0040] In the above technical solution, the first thickness detection unit obtains the number of first electrode pieces by detecting the thickness of the first electrode piece picked up by the first pickup unit, thereby determining whether there are multiple pieces of the first electrode 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 electrode piece it has picked up to a waste area or a recycling area. Similarly, the second thickness detection unit obtains the number of second electrode pieces by detecting the thickness of the second electrode piece picked up by the second pickup unit, thereby determining whether there are multiple pieces of the second electrode 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 electrode piece it has picked up to a waste area or a recycling area.

[0041] 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. 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.

[0042] 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 has picked up to the lamination device, and the second transfer mechanism is allowed to transfer the second electrode piece it has picked up to the lamination device. If they do not meet the standards, the first transfer mechanism transfers the first electrode piece it has transferred to a waste area or a recycling area, and the second transfer mechanism transfers the second electrode piece it has transferred to a waste area or a recycling area.

[0043] As an optional technical solution of an embodiment of the present application, the lamination system includes a first gluing mechanism, which is arranged downstream of the lamination device and is used to apply finishing glue or corner glue to the battery cell.

[0044] In the above technical solution, by setting up a first gluing mechanism, after the lamination device completes the lamination to form the battery cell, finishing glue or corner glue is applied to the battery cell to stabilize the shape of the battery cell and reduce the risk of battery cell collapse.

[0045] 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 cutter mechanism, the glue material unwinding mechanism is used to unwind the tape; the material pulling mechanism is used to pull the tape to convey the tape to the gluing assembly; the cutter mechanism is used to cut off the portion of the tape located between the material pulling mechanism and the gluing assembly to obtain glue, and the gluing assembly is used to stick the glue material to the battery cell.

[0046] In the above technical solution, the 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 pulling mechanism pulls the tape and supplies the tape to the gluing assembly, the cutter mechanism can cut the tape between the 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 unwound each time as needed and pasted to the battery cell. In this way, the length of the adhesive is more appropriate, which can not only effectively stabilize the shape of the battery cell and reduce the risk of battery cell collapse, but also not easily interfere with other components.

[0047] 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.

[0048] In the above technical solution, when the tape needs to be unwound, the first clamping unit releases the tape, while the second clamping unit grips the tape and moves toward or away from the first clamping unit to unwind the tape. Once the first clamping unit is in position, it unwinds the tape to a fixed length. At this point, both the first and second clamping units grip the tape, facilitating the cutting mechanism to cut the tape and form a rubber sheet. The second clamping unit then releases the tape and moves away from or toward the first clamping unit to reset itself and prepare for the next pull.

[0049] As an optional technical solution of an embodiment of the present application, the glue-applying 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.

[0050] In the above technical solution, the adhesive is adsorbed by the adsorption member, which can not only pick up the adhesive better but also not easily damage the adhesive. The adsorption member is driven to move by the fourth driving mechanism to transfer the adhesive and stick the adhesive to the battery cell.

[0051] As an optional technical solution of an 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 to glue the battery cells.

[0052] 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.

[0053] 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 to hot press the battery cells.

[0054] In the above technical solution, the hot pressing device is provided to hot-press the battery cells. On the one hand, this improves the flatness of the battery cells, ensuring that the thickness of the battery cells meets the requirements and has a high degree of consistency. On the other hand, it reduces wrinkles in the separator membrane, expels air from the battery cells, and closely adheres the separator membrane to the first electrode sheet, and the separator membrane to the second electrode sheet, shortening the diffusion distance of metal ions and reducing the internal resistance of the battery cells.

[0055] 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, 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 close to the battery cell so that the hot pressing piece can hot-press the battery cell.

[0056] In the above technical solution, a battery cell can be placed on the hot pressing workbench. At this time, the fifth drive mechanism can drive the hot pressing part close to the battery cell to perform hot pressing. After the hot pressing is completed, the fifth drive mechanism can drive the hot pressing part away from the battery cell, allowing the battery cell to be transferred to the next workstation and prepared for the next hot pressing.

[0057] 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 and the second electrode of the battery cell respectively when the hot pressing member hot presses the battery cell.

[0058] 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.

[0059] 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.

[0060] In the above technical solution, by providing an anti-stick coating on the surface of the hot pressing part facing the hot pressing workbench, it is possible to reduce the risk of adhesion between the hot pressing part and the battery cell, and also reduce the risk of other impurities adhering to the hot pressing part, thereby reducing the risk of damage to the battery cell caused by the hot pressing part when hot pressing the battery cell.

[0061] As an optional technical solution of an embodiment of the present application, the anti-stick coating includes a ceramic layer.

[0062] In the above technical solution, a ceramic layer is used as the anti-stick coating, which has a good anti-stick effect and a low cost.

[0063] 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 cells.

[0064] In the above technical solution, the tab welding mechanism is used to facilitate automatic welding of the tabs for the battery cells, thereby improving the degree of automation of the stacking system.

[0065] As an optional technical solution of an embodiment of the present application, the tab welding mechanism includes a first tab providing mechanism, a second tab providing mechanism, a first welding mechanism, a second welding mechanism and a conveying mechanism, the first tab providing mechanism is arranged at the first workstation, and the first tab providing mechanism is used to provide the first tab; the second tab providing mechanism is arranged at the second workstation, and the second tab providing mechanism is used to provide the second tab; the first welding mechanism is arranged at the third workstation, and the first welding mechanism is used to weld the first tab 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 tab 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.

[0066] In the above technical solution, the conveying mechanism transports the battery cell to the first, second, third, and fourth workstations. When the battery cell passes through the first workstation, the first tab providing mechanism provides the first tab to the battery cell. When the battery cell passes through the second workstation, the second tab providing mechanism provides the second tab to the battery cell. When the battery cell passes through the third workstation, the first welding mechanism welds the first tab to the battery cell. When the battery cell passes through the fourth workstation, the second welding mechanism welds the second tab to the battery cell, thereby completing the automatic welding of the first electrode sheet to the battery cell and the second electrode sheet to the battery cell, achieving a high degree of automation.

[0067] As an optional technical solution of an embodiment of the present application, 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.

[0068] In the above technical solution, the conveying mechanism includes a turntable, which rotates to convey the battery cells to the first, second, third, and fourth workstations. The turntable occupies a small area and has high conveying efficiency and stability.

[0069] As an optional technical solution of the 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 electrode tab and the second electrode tab.

[0070] In the above technical solution, a positioning fixture is provided to position the battery cell, the first electrode tab and the second electrode tab, so that the relative positions of the first electrode tab and the battery cell, and the relative positions of the second electrode tab and the battery cell are not easily changed, which is beneficial to improving the welding effect.

[0071] As an optional technical solution of an embodiment of the present application, the positioning fixture includes a support platform, a first clamp, a second clamp and a third clamp, the support platform is connected to the turntable, the first clamp, the second clamp and the third clamp are connected to the support platform, the first clamp is used to position the battery cell on the support platform, the second clamp is used to position the first pole ear on the battery cell, and the third clamp is used to position the second pole ear on the battery cell.

[0072] In the above technical solution, the support table is connected to a turntable, which can transport the support table to the first, second, third, and fourth workstations. 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 easily changed. The second clamp can position the first tab on the battery cell so that the relative position of the first tab and the battery cell is not easily changed. The third clamp can position the second tab on the battery cell so that the relative position of the second tab and the battery cell is not easily changed, thereby improving the welding effect.

[0073] 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.

[0074] In the above technical solution, by providing a first dust removal mechanism to remove dust from the first welding head, the first welding head is kept clean before each welding of the first tab and the battery cell, which is beneficial to improving the welding effect. Similarly, by providing a 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 tab and the battery cell, which is beneficial to improving the welding effect.

[0075] As an optional technical solution of an embodiment of the present application, the 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, and the second gluing mechanism is used to glue at the welding position between the first tab and the first pole piece and the welding position between the second tab and the second pole piece.

[0076] In the above technical solution, the conveying mechanism can convey the battery cell to the first, second, third, fourth, and fifth stations. At the third station, the first welding mechanism welds the first electrode sheet to the battery cell, and at the fourth station, the second welding mechanism welds the second electrode sheet to the battery cell. At the fifth station, the second gluing mechanism can apply glue to the welding positions of the first tab and the first electrode sheet, and the welding positions of the second tab and the second electrode sheet to protect the welding positions.

[0077] 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.

[0078] In the above technical solution, the conveying mechanism can convey the battery cells to the first, second, third, fourth, fifth, and sixth stations. At the third station, the first welding mechanism welds the first electrode sheet to the battery cell, and at the fourth station, the second welding mechanism welds the second electrode sheet to the battery cell. At the fifth station, the second gluing mechanism can apply glue to the welding position between the first tab and the first electrode sheet, and the welding position between the second tab and the second electrode sheet to protect the welding positions. 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.

[0079] 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 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.

[0080] In the above technical solution, the first gluing mechanism can apply finishing glue or 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

[0081] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0082] FIG1 is a schematic structural diagram of a lamination system provided in some embodiments of the present application;

[0083] FIG2 is a schematic structural diagram of the connection between the release film unwinding mechanism and the lamination device provided in some embodiments of the present application;

[0084] FIG3 is a simplified schematic diagram of the connection between the isolation film unwinding mechanism and the lamination device provided in some embodiments of the present application;

[0085] FIG4 is a schematic structural diagram of the connection between the lamination platform and the pressing mechanism provided in some embodiments of the present application;

[0086] FIG5 is an enlarged view of position A in FIG2 ;

[0087] FIG6 is a schematic diagram of placing a first pole piece on a lamination platform according to some embodiments of the present application;

[0088] FIG7 is a schematic diagram of an isolation film covering a first pole piece according to some embodiments of the present application;

[0089] FIG8 is a schematic diagram of placing a second pole piece on a lamination platform according to some embodiments of the present application;

[0090] FIG9 is a schematic diagram of an isolation film covering a second pole piece according to some embodiments of the present application;

[0091] FIG10 is a schematic diagram of placing a second first pole piece on a lamination platform according to some embodiments of the present application;

[0092] FIG11 is a schematic structural diagram of a first transfer mechanism provided in some embodiments of the present application;

[0093] FIG12 is 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;

[0094] FIG13 is a schematic structural diagram of a first adhesive application mechanism provided in some embodiments of the present application;

[0095] FIG14 is a schematic structural diagram of a hot pressing device provided in some embodiments of the present application;

[0096] FIG15 is a schematic structural diagram of a first tab providing mechanism provided in some embodiments of the present application;

[0097] FIG16 is a schematic structural diagram of a first welding mechanism provided in some embodiments of the present application;

[0098] FIG17 is a schematic structural diagram of a conveying mechanism provided in some embodiments of the present application;

[0099] FIG18 is a schematic structural diagram of a positioning fixture provided in some embodiments of the present application.

[0100] Icons: 10-Laminating 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-Laminating device; 131-Laminating 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-glueing assembly; 15 21- adsorption member; 1522- fourth driving mechanism; 153- pulling mechanism; 1531- first clamping unit; 1532- second clamping unit; 154- cutting mechanism; 16- hot pressing device; 161- hot pressing workbench; 162- hot pressing member; 163- fifth driving mechanism; 17- tab welding mechanism; 171- first tab providing mechanism; 1711- material strip unwinding mechanism; 1712- fourth transferring 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

[0101] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0102] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0103] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0104] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0105] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0106] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and do not constitute any limitation on this application.

[0107] The term "plurality" used in this application refers to two or more (including two).

[0108] In this 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 this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0109] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing for enclosing one or more battery cells. The casing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0110] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The uncoated positive electrode collector protrudes from the coated positive electrode collector, serving as the positive tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The uncoated negative electrode collector protrudes from the coated negative electrode collector, serving as the negative tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. To ensure high current flow without melting, multiple positive and negative tabs are stacked together. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0111] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0112] The electrode assembly is the component in a battery cell where the electrochemical reaction occurs. Electrode assemblies include wound electrode assemblies and laminated electrode assemblies. Currently, the production efficiency of laminated electrode assemblies is relatively low.

[0113] 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 can the lamination quality of the laminated electrode assemblies not be guaranteed, but the production efficiency is also low.

[0114] In view of this, an embodiment of the present application provides a stacking system, comprising 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 a first electrode sheet. The second transfer mechanism is used to transfer a second electrode sheet, which has an opposite polarity to the first electrode sheet. The isolation film unwinding mechanism is used to unwind the isolation film. The stacking device is used to receive the first electrode sheet, the isolation film, and the second electrode sheet, and stack the first electrode sheet, the isolation film, and the second electrode sheet to form a battery cell.

[0115] The first transfer mechanism, the second transfer mechanism and the isolation film unwinding mechanism of the stacking system can respectively provide the first pole piece, the second pole piece and the isolation film to the stacking device. The stacking device can stack the first pole piece, the isolation film and the second pole piece to form a battery cell, realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0116] The technical solution described in the embodiments of the present application is applicable to the manufacture of laminated electrode assemblies, and the use of this laminate system is beneficial to improving the laminate quality and production efficiency.

[0117] Please refer to Figure 1, which is a structural schematic diagram of a stacking system 10 provided in some embodiments of the present application. An 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 electrode 21. The second transfer mechanism 12 is used to transfer the second electrode 22, and the polarity of the second electrode 22 is opposite to that of the first electrode 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 electrode 21, the isolation film 23 and the second electrode 22, and stack the first electrode 21, the isolation film 23 and the second electrode 22 to form a battery cell 20.

[0118] 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.

[0119] 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.

[0120] The first electrode 21 and the second electrode 22 have opposite polarities, that is, one of the first electrode 21 and the second electrode 22 is a positive electrode and the other is a negative electrode. When the first electrode 21 is a positive electrode, the second electrode 22 is a negative electrode. When the first electrode 21 is a negative electrode, the second electrode 22 is a positive electrode.

[0121] The separator unwinding mechanism 14 is used to unwind the separator 23 to the laminating device 13. The separator 23 may be made of PP (polypropylene) or PE (polyethylene).

[0122] The stacking device 13 is capable of receiving the first electrode sheet 21 provided by the first transfer mechanism 11, the isolation film 23 unwound by the isolation film unwinding mechanism 14 and the second electrode sheet 22 transferred by the second transfer mechanism 12, and stacking the first electrode sheet 21, the isolation film 23 and the second electrode sheet 22 together to form a battery cell 20.

[0123] 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 electrode 21, the second electrode 22 and the isolation film 23 to the stacking device 13. The stacking device 13 can stack the first electrode 21, the isolation film 23 and the second electrode 22 to form a battery cell 20, realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0124] Please refer to Figures 1, 2, and 3. Figure 2 is a schematic diagram of the connection between the isolation film unwinding mechanism 14 and the laminating device 13 according to some embodiments of the present application. Figure 3 is a simplified schematic diagram of the connection between the isolation film unwinding mechanism 14 and the laminating device 13 according to 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 laminating device 13 includes a laminating platform 131 and a first drive mechanism 132. The laminating platform 131 has a first laminating position 138 and a second laminating position 139, which are located on either side of the output portion 141 along a first direction. The laminating platform 131 is configured to receive the first pole piece 21 at the first laminating position 138 and the second pole piece 22 at the second laminating position 139. The first drive mechanism 132 is configured to drive the laminating platform 131 to move along the first direction, thereby switching the laminating platform 131 between the first laminating position 138 and the second laminating position 139.

[0125] The output portion 141 is the component of the separator unwinding mechanism 14 that outputs the separator 23. The separator unwinding mechanism 14 may include a first unwinding roller 142, multiple rollers 143, and an output portion 141. The first unwinding roller 142 is used to mount a roll of separator 23. The separator 23 passes over the multiple rollers 143 and is output from the output portion 141. In some embodiments, the first unwinding roller 142 can be driven by a drive mechanism to actively rotate, thereby achieving active unwinding. In other embodiments, the separator unwinding mechanism 14 also includes an active roller 146, which acts on the separator 23 to drive the unwinding of the separator 23.

[0126] 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.

[0127] The first direction is the moving direction of the lamination platform 131. Referring to Figure 2, the first direction may be the X direction shown in the figure.

[0128] The stacking platform 131 is a platform structure for receiving and supporting the first pole piece 21, the isolation membrane 23, and the second pole piece 22. The first pole piece 21, the isolation membrane 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 in the first stacking position 138, it is located on one side of the output portion 141 along the first direction. When the stacking platform 131 is in the second stacking position 139, it is located on the other side of the output portion 141 along the first direction. In other words, the output portion 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 the second pole piece 22 at the second stacking position 139.

[0129] In some embodiments, to facilitate detection of whether the stacking platform 131 has reached 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 drive 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 either side of the output portion 141.

[0130] 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, which is used to extract 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 .

[0131] The first drive mechanism 132 is connected to the lamination platform 131 and is used to drive the lamination platform 131 to move in a first direction to switch the lamination platform 131 between a first lamination position 138 and a second lamination position 139. The first drive mechanism 132 may include a linear drive member, the output end of which is connected to the lamination platform 131, and the linear drive member drives the lamination platform 131 to move in the first direction. The linear drive member may be a linear cylinder, a linear electric cylinder, a linear oil cylinder, etc. The first drive mechanism 132 may also include a rotary drive member and a transmission mechanism. The rotary drive member is connected to the lamination platform 131 via the transmission mechanism, and the rotary drive member outputs rotational motion. The transmission mechanism converts the rotational motion output by the rotary drive member into linear motion of the lamination platform 131. The rotary drive member may be a motor, an internal combustion engine, etc. The transmission mechanism may be a crank slider mechanism, a screw nut mechanism, etc.

[0132] The first drive mechanism 132 can drive the stacking platform 131 to switch between a first stacking position 138 and a second stacking position 139. When the stacking platform 131 is in the first stacking position 138, it is located on one side of the output section 141 along the first direction. When the stacking platform 131 is in the second stacking position 139, it is located on the other side of the output section 141 along the first direction. The stacking platform 131 can receive the first electrode sheet 21 in the first stacking position 138 and can place one end of the isolation film 23 on the stacking platform 131. During 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 located on opposite sides of the output section 141, the isolation film 23 gradually covers the first electrode sheet 21. The stacking platform 131 reaches the second position, receives the second electrode sheet 22, and then switches from the second position to the first position. During the switching process of 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 located on either side of the output portion 141, the isolation film 23 gradually covers the second electrode sheet 22. The stacking platform 131 reaches the first position and can once again receive the first electrode sheet 21. As the stacking platform 131 switches back and forth between the first and second positions, the first electrode sheet 21, isolation film 23, and second electrode sheet 22 are gradually stacked, thereby forming the battery cell 20.

[0133] Please refer to Figures 2, 3, and 4. Figure 4 is a schematic diagram 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 press the first electrode 21, the isolation membrane 23, or the second electrode 22 against the lamination platform 131.

[0134] The pressing mechanism 133 is a mechanism for pressing the first pole piece 21, the isolation membrane 23 or the second pole piece 22 onto the stacking platform 131. The pressing mechanism 133 can press the uppermost one of the first pole piece 21, the isolation membrane 23 and the second pole piece 22, thereby pressing the lower first pole piece 21, the isolation membrane 23 and the second pole piece 22. For example, when the stacking platform 131 is in the first stacking position 138, the pressing mechanism 133 can contact the uppermost first pole piece 21, thereby pressing 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 pressing mechanism 133 can contact the uppermost second pole piece 22, thereby pressing the stacked first pole piece 21, the isolation membrane 23 and the second pole piece 22.

[0135] By setting up a clamping mechanism 133, during the process of switching the stacking 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 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 shutdown, and ensuring production efficiency to a certain extent.

[0136] Referring to Figures 2, 3, and 4, in some embodiments, the clamping mechanism 133 includes a clamping member 1331 and a second driving mechanism 1332. The clamping member 1331 is used to clamp the first pole piece 21, the isolation membrane 23, or the second pole piece 22 against the lamination platform 131. The second driving mechanism 1332 is connected to the clamping member 1331 and is used to drive the clamping member 1331 to move along a second direction and a third direction. The second direction is the stacking direction of the first pole piece 21, the isolation membrane 23, and the second pole piece 22. The third direction intersects the second direction, and the first direction intersects the plane in which the second and third directions lie.

[0137] The second direction is the stacking direction of the first electrode 21, the isolation film 23, and the second electrode 22. The third direction intersects the second direction. Referring to Figures 2 and 4, the second direction can be the Z direction shown in the figures, and the third direction can be the Y direction shown in the figures. In this case, the first, second, and third directions are perpendicular to each other.

[0138] 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 against the stacking platform 131. When the pressing member 1331 is in operation, the pressing member 1331 contacts the first pole piece 21, the isolation membrane 23, or the second pole piece 22, and the projection of the pressing member 1331 on the stacking platform 131 along the second direction at least partially overlaps with the stacking platform 131. When the pressing member 1331 is not in operation, the pressing member 1331 avoids the first pole piece 21, the isolation membrane 23, and the second pole piece 22, so that the first pole piece 21 or the second pole piece 22 can continue to be stacked.

[0139] 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 .

[0140] Please refer to Figures 2, 3, 4, and 5. Figure 5 is an enlarged view of position A in Figure 2. In some embodiments, the second drive mechanism 1332 includes a first drive member 13321 and a second drive member 13322. The first drive member 13321 is connected to the lamination platform 131, and the second drive member 13322 is connected to the first drive member 13321 and the pressing member 1331. The first drive member 13321 is used to drive the second drive member 13322 and the pressing member 1331 to move along the third direction, while the second drive member 13322 is used to drive the pressing member 1331 to move along the second direction. The first drive member 13321 and the second drive member 13322 can be linear electric cylinders, linear pneumatic cylinders, linear oil cylinders, etc.

[0141] By providing a second driving mechanism 1332 to drive the pressing member 1331 to move along the second direction and the third direction, the position of the pressing member 1331 can be changed, so that the pressing member 1331 can press the first pole piece 21, the isolation membrane 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 presses the uppermost one among the first pole piece 21, the isolation membrane 23, and the second pole piece 22.

[0142] 2 , 3 , 4 and 5 , in some embodiments, along the third direction, pressing members 1331 are provided on both sides of the lamination platform 131 .

[0143] The lamination mechanism includes a plurality of pressing mechanisms 133, some of which are located on one side of the lamination platform 131 along the third direction, and the other part of which are located on the other side of the lamination platform 131 along the third direction. In this way, pressing members 1331 are provided on both sides of the lamination platform 131 along the third direction.

[0144] By arranging clamping parts 1331 on both sides of the stacking platform 131 along the third direction, it is beneficial 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 improving the reliability of the stacking device 13, improving the stacking quality, reducing the risk of shutdown, and ensuring production efficiency to a certain extent.

[0145] 2 , 3 , 4 and 5 , in some embodiments, the pressing member 1331 includes a pressing portion 13311 , which is configured to contact the first electrode 21 , the isolation membrane 23 or the second electrode 22 . The pressing portion 13311 is sheet-shaped.

[0146] 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 sheet-shaped. Its thickness is significantly smaller than its length and width. For example, its thickness is less than 20% of its width, and its thickness is less than 20% of its length.

[0147] By configuring the pressing portion 13311 in a sheet shape, the thickness of the pressing portion 13311 along the second direction is reduced. Thus, during the switching process between the first and second positions of the lamination platform 131, the isolation diaphragm 23 covering the pressing portion 13311 reduces redundancy of the isolation diaphragm 23. Furthermore, the sheet shape of the pressing portion 13311 provides a larger contact area with the first pole piece 21, the isolation diaphragm 23, or the second pole piece 22, thereby minimizing stress concentration on the first pole piece 21, the isolation diaphragm 23, or the second pole piece 22, thereby improving lamination quality.

[0148] 2 , 3 , 4 and 5 , in some embodiments, the lamination device 13 includes a first smoothing mechanism for smoothing the isolation film 23 when the lamination platform 131 switches between the first lamination position 138 and the second lamination position 139 .

[0149] 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 to smooth the isolation film 23.

[0150] 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, and the isolation membrane 23 stacked with the first pole piece 21 and the second pole piece 22 is made smoother, thereby improving the stacking quality.

[0151] 2 , 3 , 4 , and 5 , in some embodiments, the lamination device 13 includes a frame 144, and the first smoothing mechanism includes a first smoothing member 134. 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 a first direction.

[0152] The first smoothing member 134 is a component of the first smoothing mechanism that directly contacts the isolation diaphragm 23 and smoothes the isolation diaphragm 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 manner, for example, the first smoothing member 134 can be slidably connected to the frame 144.

[0153] 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 being detachably connected, and the first clamping plate being 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 loose, the relative position of the first smoothing member 134 and the frame 144 can be adjusted. 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.

[0154] The lamination platform 131 is movably disposed on the frame 144 along a first direction. When the lamination platform 131 moves from the first lamination position 138 to the second lamination position 139, or vice versa, the first smoothing member 134 can smooth the isolation diaphragm 23. This reduces the risk of wrinkling of the isolation diaphragm 23, ensures that the isolation diaphragm 23 stacked with the first and second pole pieces 21 and 22 is relatively flat, thereby improving lamination quality.

[0155] In some embodiments, the first smoothing member 134 is made of a flexible material.

[0156] Flexible materials are materials that are softer and more flexible than rigid materials and are more susceptible to deformation when subjected to external forces. Examples of flexible materials include polyvinyl alcohol, polyester, polyimide, and polyethylene naphthalate.

[0157] 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. This allows the first smoothing member 134 to deform as the number of laminate layers increases, thereby adapting to the increasing thickness of the laminate. Furthermore, the flexible material of the first smoothing member 134 is less likely to damage the isolation membrane 23, thereby improving the quality of the laminate.

[0158] Referring to FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , in some embodiments, the output unit 141 is connected to the frame 144 .

[0159] The output portion 141 can be fixedly connected to the frame 144, for example, the output portion 141 can be welded or bonded to the frame 144. The output portion 141 can also be detachably connected to the frame 144, for example, the output portion 141 is bolted to the frame 144. The output portion 141 can also be connected to the frame 144 in an adjustable manner, for example, the output portion 141 is slidably connected to the frame 144.

[0160] 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 , thereby improving the accuracy of subsequent stacking.

[0161] 2 , 3 , 4 , and 5 , in some embodiments, the lamination device 13 includes a flipping mechanism 135 . The flipping mechanism 135 and the lamination platform 131 are arranged along a first direction. The lamination platform 131 moves along the first direction to deliver the battery cells 20 to the flipping mechanism 135 . The flipping mechanism 135 is used to flip the battery cells 20 so that the isolation film 23 is wrapped around the outside of the battery cells 20 .

[0162] The flipping mechanism 135 is used to flip the battery cell 20. The flipping mechanism 135 flips the battery cell 20, allowing the insulating film to be wrapped around or coated on the outside of the battery cell 20. The flipping mechanism 135 and the lamination platform 131 are arranged along a first direction, so that the lamination platform 131 can move in the first direction to transport the battery cell 20 to the flipping mechanism 135.

[0163] 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. The driving unit is used to drive the clamping portion to rotate to drive the battery cell 20 to rotate.

[0164] In some embodiments, the rotation axis of the battery cell 20 is parallel to the third direction.

[0165] 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 membrane 23 is covered on the outside of the battery cell 20. On the one hand, the isolation membrane 23 can protect the battery cell 20. On the other hand, the isolation membrane 23 insulates the battery cell 20 from other components.

[0166] 2 , 3 , 4 and 5 , in some embodiments, the lamination device 13 includes a second smoothing mechanism 136 , which 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 .

[0167] The second smoothing mechanism 136 is used to smooth the separator 23 between the flipping mechanism 135 and the output portion 141. The second smoothing mechanism 136 smoothes the separator 23 between the flipping mechanism 135 and the output portion 141 so that this portion of the separator 23 is less likely to wrinkle when wrapped around the outside of the battery cell 20.

[0168] By providing the second smoothing mechanism 136 , at least a portion of the isolation film 23 between the flipping mechanism 135 and the output portion 141 is smoothed. In this way, the insulation film covering the outside of the battery cell 20 is relatively flat and less prone to wrinkling, thereby improving the lamination quality.

[0169] 2 , 3 , 4 , and 5 , in some embodiments, the second smoothing mechanism 136 includes a third driving mechanism 1361 and a second smoothing member 1362, wherein the second smoothing member 1362 is connected to the third driving mechanism 1361. The third driving mechanism 1361 is configured to drive the second smoothing member 1362 to move along the extension direction of the isolation membrane 23, so that the second smoothing member 1362 smoothes the isolation membrane 23.

[0170] The second smoothing member 1362 is a component of the second smoothing mechanism 136 that directly contacts and smoothes the isolation diaphragm 23. The second smoothing member 1362 is connected to the third driving mechanism 1361 and is driven by the third driving mechanism 1361 to move along the extension direction of the isolation diaphragm 23, thereby smoothing the isolation diaphragm 23.

[0171] 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.

[0172] 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 , thereby smoothing the isolation membrane 23 . The structure is relatively simple and the smoothing effect is good.

[0173] 2 , 3 , 4 and 5 , in some embodiments, the second smoothing member 1362 is wheel-shaped, and the third driving mechanism 1361 is further used to drive the second smoothing member 1362 to rotate.

[0174] 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.

[0175] The third drive mechanism 1361 may include multiple drive components, some of which are used to achieve the movement of the second smoothing member 1362, and other drive components can be used to achieve the rotation of the second smoothing member 1362. For example, the third drive 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, and the gear is connected to the second smoothing member 1362, and the rack and the gear are meshed. 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, thereby causing the second smoothing member 1362 to move along the extension direction of the isolation diaphragm 23. When the second linear cylinder is actuated, it drives the rack to move, and the rack drives the gear to rotate, thereby driving the second smoothing member 1362 to rotate.

[0176] While moving along the extension direction of the isolation diaphragm 23, the second smoothing member 1362 can also rotate relative to the isolation diaphragm 23. This creates rolling friction between the second smoothing member 1362 and the isolation diaphragm 23, which reduces the friction force on the isolation diaphragm 23 and is less likely to damage the isolation diaphragm 23, thereby improving the quality of the lamination.

[0177] Please refer to FIG6 , which is a schematic diagram of placing the first pole piece 21 on the lamination platform 131 according to some embodiments of the present application. In some embodiments, the isolation film unwinding mechanism 14 includes a cutter unit 145 , which is used to cut the isolation film 23 .

[0178] 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.

[0179] By providing the cutter unit 145 , after the first electrode sheet 21 , the isolation film 23 and the second electrode sheet 22 are stacked, the isolation film 23 is cut off to prepare for the stacking of the next battery cell 20 .

[0180] Please refer to Figure 6, when the stacking platform 131 is in 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.

[0181] Please refer to Figure 7, which is a schematic diagram of the isolation film 23 covering the first pole piece 21 according to some embodiments of the present application. The first drive mechanism 132 drives the stacking platform 131 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.

[0182] Please refer to Figure 8, which is a schematic diagram illustrating placing the second electrode 22 on the lamination platform 131 according to some embodiments of the present application. When the lamination platform 131 reaches the second lamination position 139, the second drive mechanism 1332 drives the pressing member 1331 to release the first electrode 21, allowing the second electrode 22 to be placed on the first electrode 21. At this point, a separation film 23 is located between the second electrode 22 and the first electrode 21. The second drive mechanism 1332 then operates again, pressing the second electrode 22 against the lamination platform 131.

[0183] Please refer to Figure 9, which is a schematic diagram of the isolation film 23 covering the second pole piece 22 according to some embodiments of the present application. The second drive mechanism 1332 drives the stacking platform 131 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.

[0184] Please refer to Figure 10, which is a schematic diagram illustrating placing a second first pole piece 21 on the lamination platform 131 according to some embodiments of the present application. When the lamination platform 131 returns to the first lamination position 138, the second drive mechanism 1332 drives the pressing member 1331 to release the second pole piece 22, facilitating the placement of a new first pole piece 21 on the second pole piece 22. At this point, a layer of isolation film 23 is located between the new first pole piece 21 and the second pole piece 22. The second drive mechanism 1332 is activated again to press the new first pole piece 21 against the lamination platform 131.

[0185] Repeat the above process to complete the lamination.

[0186] Please refer to Figures 11 and 12. Figure 11 is a schematic structural diagram of the first transfer mechanism 11 provided in some embodiments of the present application. Figure 12 is a schematic block diagram of the connection between the first detection unit 114 and the first pickup unit 113 provided in 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 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 time, and the second pickup unit responds to the second detection unit.

[0187] The first pickup unit 113 is the portion of the first transfer mechanism 11 used to pick up the first pole piece 21. In some embodiments, the first pickup unit 113 includes a first pickup portion, which may include a negative pressure suction mechanism to pick up the first pole piece 21 by negative pressure suction. In other embodiments, the first pickup portion includes a clamping claw to pick up the first pole piece 21 by clamping.

[0188] In some embodiments, the first pickup unit 113 further includes a fourth drive member 111 and a fifth drive member 112, wherein the fifth drive member 112 connects the fourth drive member 111 and the first pickup portion, the fourth drive member 111 is used to drive the fifth drive member 112 and the first pickup portion to move as a whole in the first direction, and the fifth drive member 112 is used to drive the first pickup portion to move in the second direction. The fourth drive member 111 and the fifth drive 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, and the first pickup portion is connected to the three-axis manipulator, which drives the first pole piece 21 to be lowered and transferred to the lamination device 13.

[0189] 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 determined whether the picked up first pole pieces 21 are stuck. The first detection unit 114 can be an industrial camera.

[0190] The first detection unit 114 can be directly electrically connected to the first pickup unit 113, or can be indirectly electrically connected via 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 electrode pieces 21 picked up by the first pickup unit 113 exceeds one, the controller controls the first pickup unit 113 to transfer the picked-up first electrode piece 21 to a waste area or a recycling area. Otherwise, the first electrode piece 21 is transferred to the lamination device 13.

[0191] The second pickup unit is a portion of the second transfer mechanism 12 for picking up the second pole piece 22. The structure of the second pickup unit can refer to the structure of the first pickup unit 113, and will not be described in detail here.

[0192] 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 determined whether the picked up second pole pieces 22 are stuck. The second detection unit can be an industrial camera.

[0193] The second detection unit can be directly electrically connected to the second pickup unit, or indirectly electrically connected via 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 electrode pieces 22 picked up by the second pickup unit exceeds one, the controller controls the second pickup unit to transfer the picked-up second electrode piece 22 to a waste area or a recycling area. Otherwise, the second electrode piece 22 is transferred to the lamination device 13.

[0194] 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 multiple 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 multiple 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.

[0195] 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.

[0196] The first pickup unit 113 is responsive to the first thickness detection unit. When the first thickness detection unit detects that the thickness of the first electrode piece 21 is greater than a preset value, the number of first electrode pieces 21 can be determined based on the ratio of the detected thickness to the preset thickness of the first electrode piece 21, thereby determining that multiple first electrode pieces 21 are stuck together. The first thickness detection unit can be a laser thickness gauge, an infrared thickness gauge, or the like.

[0197] Similarly, the second pickup unit is responsive to the second thickness detection unit. When the second thickness detection unit detects that the thickness of the second electrode piece 22 is greater than a preset value, the number of second electrode pieces 22 can be determined based on the ratio of the detected thickness to the preset thickness of the second electrode piece 22, thereby determining that multiple pieces of the picked-up second electrode piece 22 are adhered to each other. The second thickness detection unit can be a laser thickness gauge, an infrared thickness gauge, or the like.

[0198] The first thickness detection unit detects the thickness of the first electrode piece 21 picked up by the first pickup unit 113 to obtain the number of the first electrode piece 21, thereby determining whether there are multiple pieces of the first electrode 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 electrode piece 21 it has picked up to the waste area or the recycling area. Similarly, the second thickness detection unit detects the thickness of the second electrode piece 22 picked up by the second pickup unit to obtain the number of the second electrode piece 22, thereby determining whether there are multiple pieces of the second electrode 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 electrode piece 22 it has picked up to the waste area or the recycling area.

[0199] 11 and 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 configured to detect the appearance of the first electrode 21 and the second electrode 22 , and the first transfer mechanism 11 and the second transfer mechanism 12 are both responsive to the first detection mechanism 115 .

[0200] The first inspection mechanism 115 is a mechanism for inspecting 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 inspection mechanism 115 can be an industrial camera that can confirm whether the first electrode 21 and the second electrode 22 have defects by taking pictures and comparing them. The first transfer mechanism 11 can be directly electrically connected to the first inspection mechanism 115, or it can be electrically connected to the first inspection mechanism 115 through an intermediate component. Similarly, the second transfer mechanism 12 can be directly electrically connected to the first inspection mechanism 115, or it can be electrically connected to the first inspection mechanism 115 through an intermediate component.

[0201] When the first inspection mechanism 115 detects a defect in the first electrode 21 transferred by the first transfer mechanism 11, the first transfer mechanism 11 responds to the first inspection mechanism 115 and transfers the transferred first electrode 21 to a scrap area or a recycling area. Otherwise, the first electrode 21 is transferred to the lamination device 13. When the first inspection mechanism 115 detects a defect in the second electrode 22 transferred by the second transfer mechanism 12, the second transfer mechanism 12 responds to the first inspection mechanism 115 and transfers the transferred second electrode 22 to a scrap area or a recycling area. Otherwise, the second electrode 22 is transferred to the lamination device 13.

[0202] A first inspection mechanism 115 is provided to inspect 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 it has picked up to the lamination device 13, and the second transfer mechanism 12 is allowed to transfer the second electrode piece 22 it has picked up to the lamination device 13. If they do not meet the standards, the first transfer mechanism 11 transfers the first electrode piece 21 it has transferred to a waste area or a recycling area, and the second transfer mechanism 12 transfers the second electrode piece 22 it has transferred to a waste area or a recycling area.

[0203] 11 and 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 configured to remove dust from the first electrode sheet 21 transferred by the first transfer mechanism 11 and the second electrode sheet 22 transferred by the second transfer mechanism 12. The third dust removal mechanism 116 may include a dust removal brush to remove dust from the first electrode sheet 21 and the second electrode sheet 22.

[0204] Please refer to Figure 13, which is a 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 the 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 cells 20.

[0205] The first gluing mechanism 15 is used to apply finishing tape or corner tape to the battery cells 20. The stacking system 10 also includes a third transfer mechanism 137, which is disposed downstream of the stacking device 13 and is used to transfer the battery cells 20 stacked by the stacking device 13 to the first gluing mechanism 15.

[0206] 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 the battery cell 20 collapsing.

[0207] Referring to Figure 13 , in some embodiments, the first gluing mechanism 15 includes a material unwinding mechanism 151, a gluing assembly 152, a material pulling mechanism 153, and a cutter mechanism 154. The material unwinding mechanism 151 is used to unwind the adhesive tape. The material pulling mechanism 153 is used to pull the adhesive tape and deliver it to the gluing assembly 152. The cutter mechanism 154 is used to cut the portion of the adhesive tape between the material pulling mechanism 153 and the gluing assembly 152 to obtain the adhesive material. The gluing assembly 152 is used to apply the adhesive material to the battery cell 20.

[0208] The adhesive unwinding mechanism 151 is used to unwind the adhesive tape. It may include a second unwinding roller, which is used to receive the tape roll. Because the material pulling mechanism 153 is provided, the adhesive tape can be unwound to a fixed length driven by the material pulling mechanism 153, eliminating the need for a drive mechanism to actively rotate the second unwinding roller.

[0209] The pulling mechanism 153 is a mechanism for pulling the adhesive tape to achieve fixed-length unwinding of the adhesive tape. The pulling mechanism 153 can pull out a fixed-length adhesive tape as needed. The adhesive tape pulled out by the pulling mechanism 153 is received by the adhesive application assembly 152.

[0210] The cutter mechanism 154 can cut the portion of the tape between the drawing mechanism 153 and the gluing assembly 152, thereby obtaining a fixed length of adhesive. The cutter mechanism 154 includes a cutter and a cutter driver. The cutter driver is disposed between the drawing mechanism 153 and the gluing assembly 152 and is connected to the cutter. The cutter driver is used to drive the cutter toward the tape, thereby severing the tape to form an adhesive.

[0211] The adhesive component 152 transfers the cut adhesive material and adheres it to the battery cell 20 to complete the application of finishing adhesive or corner adhesive.

[0212] The pulling mechanism 153 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 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 pulling mechanism 153 and the gluing assembly 152, thereby obtaining 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 unwound each time as needed, and it can be stuck to the battery cell 20. In this way, the length of the adhesive is more appropriate, which can not only effectively stabilize the shape of the battery cell 20 and reduce the risk of collapse of the battery cell 20, but also is not easy to interfere with other components.

[0213] 13 , in some embodiments, the pulling mechanism 153 includes a first clamping unit 1531 and a second clamping unit 1532 , both for clamping the tape. The second clamping unit 1532 can move toward or away from the first clamping unit 1531 .

[0214] The first clamping unit 1531 is used to clamp the tape, and the position of the first clamping unit 1531 is fixed. The second clamping unit 1532 is also used to clamp the tape, but the second clamping unit 1532 can move toward or away from the first clamping unit 1531.

[0215] 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 toward the tape unwinding mechanism.

[0216] 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.

[0217] 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 move closer to or away from the first clamping unit 1531 .

[0218] 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 unwound. When the first clamping unit 1531 moves into position, it unwinds the tape of a fixed length. At this point, both the first clamping unit 1531 and the second clamping unit 1532 clamp the tape, making it easier for the cutter mechanism 154 to cut the tape and form a rubber material. Afterwards, the second clamping unit 1532 releases the tape and moves away from or toward the first clamping unit 1531 to complete the reset and prepare for the next material pulling.

[0219] Referring to FIG. 13 , in some embodiments, the adhesive application assembly 152 includes a fourth drive mechanism 1522 and an adsorbent 1521 . The adsorbent 1521 is configured to absorb the adhesive. The fourth drive mechanism 1522 is connected to the adsorbent 1521 and is configured to drive the adsorbent 1521 to move, thereby applying the adhesive to the battery cell 20 .

[0220] 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, which is used to extract negative pressure for the adsorption holes 1311 , thereby adsorbing the tape.

[0221] The fourth driving mechanism 1522 is used to move 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.

[0222] The adhesive is adsorbed by the adsorption member 1521 , which can not only pick up the adhesive better but also avoid damaging the adhesive. The adsorption member 1521 is driven to move by the fourth driving mechanism 1522 to transfer the adhesive and adhere the adhesive to the battery cell 20 .

[0223] In some embodiments, the lamination system 10 includes a plurality of first gluing mechanisms 15 , each of which is used to glue the battery cells 20 .

[0224] 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 .

[0225] Optionally, the lamination system 10 includes five first gluing mechanisms 15 , one of which is used to apply finishing glue to the battery cell 20 , and the remaining four first gluing mechanisms 15 are used to apply glue to the four corners of the battery cell 20 .

[0226] 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.

[0227] Please refer to Figure 14, which is 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.

[0228] The hot pressing device 16 is used to hot-press the battery cells 20. It is located downstream of the first gluing mechanism 15 and hot-presses the battery cells 20 after the finishing and corner glue application. A robot can be used to pick up the battery cells 20 located at the first gluing mechanism 15 and bring them to the hot pressing device 16 for hot pressing.

[0229] 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, ensuring that the thickness of the battery cell 20 meets the requirements and has a high degree of consistency. On the other hand, wrinkles in the separator 23 can be reduced, air inside the battery cell 20 can be expelled, and the separator 23 and the first electrode sheet 21, and the separator 23 and the second electrode sheet 22 can be closely attached together, thereby shortening the diffusion distance of metal ions and reducing the internal resistance of the battery cell 20.

[0230] Referring to Figure 14 , in some embodiments, the hot pressing device 16 includes a hot pressing workbench 161, a hot pressing member 162, and a fifth driving mechanism 163. The hot pressing workbench 161 is used to place the battery cell 20, and the hot pressing member 162 is disposed opposite the hot pressing workbench 161. The fifth driving mechanism 163 is connected to the hot pressing member 162 and is used to drive the hot pressing member 162 toward the battery cell 20 so that the hot pressing member 162 can hot-press the battery cell 20.

[0231] The hot pressing table 161 is a platform for supporting the battery cells 20. A hot pressing member 162 is positioned opposite the hot pressing table 161 along the second direction. A fifth driving mechanism 163 is connected to the hot pressing member 162 to drive the hot pressing member 162 toward the hot pressing table 161, thereby hot pressing the battery cells 20 positioned thereon.

[0232] The fifth drive mechanism 163 may include a linear drive member, the output end of which is connected to the hot press member 162, and the linear drive member drives the hot press member 162 to move in the second direction. The linear drive member may be a linear air cylinder, a linear electric cylinder, a linear oil cylinder, etc. The fifth drive mechanism 163 may also include a rotary drive member and a transmission mechanism, the rotary drive member being connected to the hot press member 162 via the transmission mechanism, the rotary drive member outputting rotational motion, and the transmission mechanism converting the rotational motion output by the rotary drive member into linear motion of the hot press member 162. The rotary drive member may be a motor, an internal combustion engine, etc. The transmission mechanism may be a crank slider mechanism, a screw nut mechanism, etc.

[0233] The battery cell 20 can be placed on the hot pressing workbench 161. At this time, the fifth drive mechanism 163 can drive the hot pressing member 162 toward the battery cell 20, thereby hot pressing the battery cell 20. After the hot pressing is completed, the fifth drive mechanism 163 can drive the hot pressing member 162 away from the battery cell 20, allowing the battery cell 20 to be transferred to the next station and prepared for the next hot pressing.

[0234] In some embodiments, the hot press 162 is provided with a first probe and a second probe, which are used to electrically connect to the first electrode 21 and the second electrode 22 of the battery cell 20 respectively when the hot press 162 hot presses the battery cell 20 .

[0235] 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 .

[0236] In some embodiments, the hot pressing platform is provided with multiple battery cell 20 placement positions, which can place multiple battery cells 20 at one time. The fifth driving mechanism 163 drives the hot pressing member 162 close to the hot pressing platform, thereby hot pressing multiple battery cells 20 at one time.

[0237] In some embodiments, the surface of the hot pressing member 162 facing the hot pressing workbench 161 is provided with an anti-stick coating.

[0238] 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 .

[0239] Anti-stick coating refers to a coating used to reduce material adhesion.

[0240] 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 can be reduced, 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.

[0241] In some embodiments, the release coating includes a ceramic layer.

[0242] The ceramic layer is used as the anti-stick coating, which has good anti-stick effect and low cost.

[0243] Optionally, the anti-stick coating may also be a nano-antifouling fluoride coating, a diamond-like carbon coating, or the like.

[0244] 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 to the battery cells 20 .

[0245] The tab welding mechanism 17 is used to weld tabs to the battery cells 20. The tab welding mechanism 17 is disposed 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 cells 20 can be transferred from the hot pressing device 16 to the tab welding mechanism 17 by a robot arm to facilitate the welding of tabs to the battery cells 20.

[0246] The tab welding mechanism 17 facilitates automatic welding of the tabs for the battery cells 20 , thereby improving the degree of automation of the stacking system 10 .

[0247] Please refer to Figures 15, 16, and 17. Figure 15 is a schematic diagram of the structure of a first tab providing mechanism 171 provided in some embodiments of the present application. Figure 16 is a schematic diagram of the structure of a first welding mechanism 173 provided in some embodiments of the present application. Figure 17 is a schematic diagram of the structure of a conveying mechanism 175 provided in some embodiments of the present application. In some embodiments, 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 located at the first workstation and is used to provide the first tab 24. The second tab providing mechanism is located at the second workstation and is used to provide the second tab 25. The first welding mechanism 173 is located at the third workstation and is used to weld the first tab 24 to the first pole sheet 21. The second welding mechanism is located at the fourth workstation and is used to weld the second tab 25 to the second pole sheet 22. The conveying mechanism 175 is used to convey the battery cells 20 to the first station, the second station, the third station and the fourth station.

[0248] The first tab providing mechanism 171 and the second tab providing mechanism are respectively used to provide the first tab 24 and the second tab 25. The first tab providing mechanism 171 and the second tab providing mechanism have the same structure, and the first tab providing mechanism 171 is used as an example for description.

[0249] The first tab providing mechanism 171 includes a tape unwinding mechanism 1711, a fourth transfer mechanism 1712, a pull mechanism 1713, and a cutting mechanism 1714. The tape unwinding mechanism 1711 is used to unwind the tape. The pull mechanism 1713 is used to pull the tape and transfer it to the fourth transfer mechanism 1712. The cutting mechanism 1714 is used to cut the portion of the tape between the pull mechanism 1713 and the fourth transfer mechanism 1712 to obtain the first tab 24. The fourth transfer mechanism 1712 is used to transfer the first tab 24 to the battery cell 20.

[0250] The tape unwinding mechanism 1711 is used to unwind the tape. It may include a third unwinding roller, which is used to receive the tape roll. Because the tape tensioning mechanism 1713 is provided, the tape can be unwound to a fixed length under the drive of the tensioning mechanism 1713, eliminating the need for a drive mechanism to actively rotate the third unwinding roller.

[0251] The belt pulling mechanism 1713 is used to pull the material belt to achieve fixed-length unwinding of the material belt. The belt pulling mechanism 1713 can pull out the material belt of a fixed length as needed. The material belt pulled by the belt pulling mechanism 1713 is received by the fourth transfer mechanism 1712.

[0252] 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 electrode tab 24 of a fixed length. The cutting mechanism 1714 includes a cutter and a cutting drive. The cutting drive is disposed between the drawing mechanism 1713 and the fourth transfer mechanism 1712. The cutting drive is connected to the cutter and is used to drive the cutter to approach the material strip, thereby cutting the material strip to form the first electrode tab 24.

[0253] The fourth transfer mechanism 1712 transfers the severed first electrode tab 24 to the battery cell 20 .

[0254] The pulling mechanism 1713 can pull the material tape, thereby unwinding the material tape, so that the unwinding can be carried out according to the required amount of 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 conducive to improving the quality of the battery cell 20.

[0255] 15 , in some embodiments, the strip pulling mechanism 1713 includes a third clamping unit 17131 and a fourth clamping unit 17132, both of which are used to clamp the strip. The fourth clamping unit 17132 can move toward or away from the third clamping unit 17131.

[0256] 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.

[0257] 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 toward the material strip unwinding mechanism 1711.

[0258] 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 can drive the clamping jaw to clamp or loosen so as to clamp or release the material strip.

[0259] 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 move closer to or away from the third clamping unit 17131.

[0260] 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. After the third clamping unit 17131 moves into position, it unwinds the tape of a fixed length. 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 and form the first tab 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.

[0261] 15 , in some embodiments, the fourth transfer mechanism 1712 includes a sixth driving member 17122 and a picking member 17121. The picking member 17121 is configured to pick up the first electrode tab 24. The sixth driving member 17122 is connected to the picking member 17121 and is configured to drive the picking member 17121 to move so as to provide the first electrode tab 24 to the battery cell 20.

[0262] The pickup member 17121 may be provided with a plurality of adsorption holes 1311, which are connected to a negative pressure mechanism for applying negative pressure to the adsorption holes 1311, thereby adsorbing the first tab 24. In other embodiments, the pickup member 17121 may also be a clamping claw for picking up the first tab 24 by clamping.

[0263] The sixth driving member 17122 is used to move the picking member 17121, thereby providing 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.

[0264] 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 can be ultrasonic welding mechanisms, laser welding mechanisms, etc.

[0265] 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.

[0266] The conveying mechanism 175 conveys the battery cell 20 to the first, second, third, and fourth workstations. When the battery cell 20 passes through the first workstation, 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 workstation, the second tab providing mechanism provides the second tab 25 to the battery cell 20. When the battery cell 20 passes through the third workstation, the first welding mechanism 173 welds the first tab 24 to the battery cell 20. When the battery cell 20 passes through the fourth workstation, the second welding mechanism welds the second tab 25 to the battery cell 20, thereby completing 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.

[0267] 15 , 16 and 17 , in 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 .

[0268] “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 outside the turntable 1751 rather than being provided 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.

[0269] The conveying mechanism 175 includes a turntable 1751, which conveys the battery cells 20 to the first, second, third, and fourth stations by rotating the turntable 1751. The turntable 1751 occupies a small area and has high conveying efficiency and stability.

[0270] 15, 16, 17, and 18. FIG18 is a schematic diagram of a positioning fixture 1752 provided in some embodiments of the present application. In some embodiments, a positioning fixture 1752 is provided on the turntable 1751 to position the battery cell 20, the first tab 24, and the second tab 25.

[0271] 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 positions of the first pole tab 24 and the battery cell 20 and the second pole tab 25 and the battery cell 20 are not easily changed, which is conducive to improving the welding effect.

[0272] Referring to Figures 15, 16, 17, and 18, in some embodiments, the positioning fixture 1752 includes a support platform 17521, a first clamping jaw 17522, a second clamping jaw 17523, and a third clamping jaw 17524. The support platform 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 platform 17521. The first clamping jaw 17522 is used to position the battery cell 20 on the support platform 17521. The second clamping jaw 17523 is used to position the first tab 24 on the battery cell 20. The third clamping jaw 17524 is used to position the second tab 25 on the battery cell 20.

[0273] 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 tab 24 and the second tab 25. The support platform 17521 is connected to the turntable 1751 so that the positioning fixture 1752 rotates with the rotation of the turntable 1751.

[0274] 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 movement of the first clamping jaw 17522, thereby automatically clamping and releasing the battery cell 20 by the first clamping jaw 17522.

[0275] The second clamping jaw 17523 can be rotatably connected to the support platform 17521. In this way, the first tab 24 can be clamped and released by rotating the second clamping jaw 17523, so that the first tab 24 is positioned in the battery cell 20. The second clamping jaw 17523 can also be slidably connected to the support platform 17521. In this way, the first tab 24 can be clamped and released by sliding the second clamping jaw 17523, so that the first tab 24 is positioned in the battery cell 20. In addition, a driving mechanism can be provided to drive the second clamping jaw 17523 to operate, thereby automatically achieving the second clamping jaw 17523 clamping and releasing of the first tab 24.

[0276] The third clamping jaw 17524 can be rotatably connected to the support platform 17521. In this way, the second tab 25 can be clamped and released by rotating the third clamping jaw 17524, thereby positioning the third tab in the battery cell 20. The third clamping jaw 17524 can also be slidably connected to the support platform 17521. In this way, the second tab 25 can be clamped and released by sliding the third clamping jaw 17524, thereby positioning the second tab 25 in the battery cell 20. In addition, a driving mechanism can be provided to drive the movement of the third clamping jaw 17524, thereby automatically achieving the clamping and release of the third clamping jaw 17524 on the second tab 25.

[0277] The support platform 17521 is connected to the turntable 1751, and the turntable 1751 can transport the support platform 17521 to the first, second, third, and fourth workstations. The first clamping jaw 17522 can position the battery cell 20 on the support platform 17521, so that the relative position of the battery cell 20 and the support platform 17521 is not easily changed. The second clamping jaw 17523 can position the first tab 24 on the battery cell 20, so that the relative position of the first tab 24 and the battery cell 20 is not easily changed. The third clamping jaw 17524 can position the second tab 25 on the battery cell 20, so that the relative position of the second tab 25 and the battery cell 20 is not easily changed, thereby improving the welding effect.

[0278] Referring to Figures 15, 16, 17, and 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 electrode tab 24 and the first electrode 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 electrode tab 25 and the second electrode piece 22, and the second dust removal mechanism is used to remove dust from the second welding head.

[0279] The first welding head 1731 is a welding component used to weld the first electrode tab 24 to the first electrode piece 21. The first welding head 1731 can be a laser welding head, an ultrasonic welding head, or the like. The first welding mechanism 173 can also include a seventh driving member 1733 connected to the first welding head 1731 to drive the first welding head 1731 toward the battery cell 20, thereby welding the first electrode tab 24 to the first electrode piece 21.

[0280] First dust removal mechanism 1732 is used to remove dust from first welding head 1731. First dust removal mechanism 1732 may include a dust removal member 17321 and a sixth drive mechanism 17322. Dust removal member 17321 is used to remove dust from first welding head 1731. Sixth drive mechanism 17322 is connected to dust removal member 17321 and is used to drive dust removal member 17321 toward or away from first welding head 1731. Dust removal member 17321 may be a dust removal brush, an electrostatic precipitator, or the like.

[0281] 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 here.

[0282] By providing a 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 electrode tab 24 and the battery cell 20, which is beneficial to improving the welding effect. Similarly, by providing a 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 electrode tab 25 and the battery cell 20, which is beneficial to improving the welding effect.

[0283] In some embodiments, the tab welding mechanism 17 further includes a second gluing mechanism, which is disposed at the fifth station. The conveying mechanism 175 is further configured to convey the battery cell 20 to the fifth station. The second gluing mechanism is configured to apply glue to the welding position between the first tab 24 and the first electrode sheet 21 and the welding position between the second tab 25 and the second electrode sheet 22.

[0284] The second gluing mechanism is used to apply glue to the welding locations between the first tab 24 and the first electrode sheet 21, and the second tab 25 and the second electrode sheet 22. The second gluing mechanism is located 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, allowing the second gluing mechanism to apply glue to the welding locations between the first tab 24 and the first electrode sheet 21, and the second tab 25 and the second electrode sheet 22.

[0285] 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 here.

[0286] The conveying mechanism 175 can convey the battery cell 20 to the first, second, third, fourth, and fifth stations. At the third station, the first welding mechanism 173 welds the first electrode sheet 21 to the battery cell 20. At the fourth station, the second welding mechanism welds the second electrode sheet 22 to the battery cell 20. At the fifth station, the second gluing mechanism can apply glue to the welding position between the first electrode tab 24 and the first electrode sheet 21 and the welding position between the second electrode tab 25 and the second electrode sheet 22 to protect the welding positions.

[0287] In some embodiments, the tab welding mechanism 17 includes a second inspection mechanism, which is located at the sixth station. The conveying mechanism 175 is also used to convey the battery cell 20 to the sixth station, where the second inspection mechanism is used to inspect the appearance of the battery cell 20.

[0288] The second inspection mechanism is used to inspect the appearance of the battery cells 20 to confirm whether they have defects. This second inspection mechanism can be an industrial camera that takes photos and compares them to confirm whether the battery cells 20 have defects. Prior to the fifth station, the battery cells 20 have already been manufactured. The second inspection mechanism is used to inspect the appearance of the manufactured battery cells 20 to confirm their conformity.

[0289] The conveying mechanism 175 can convey the battery cell 20 to the first, second, third, fourth, fifth, and sixth stations. At the third station, the first welding mechanism 173 welds the first electrode sheet 21 to the battery cell 20. At the fourth station, the second welding mechanism welds the second electrode sheet 22 to the battery cell 20. At the fifth station, the second gluing mechanism can apply glue to the welding position between the first electrode tab 24 and the first electrode sheet 21, and the welding position between the second electrode tab 25 and the second electrode sheet 22 to protect the welding positions. 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 standards.

[0290] Referring 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 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 to the battery cell 20. The first gluing mechanism 15 is disposed downstream of the lamination device 13, the hot pressing device 16 is disposed downstream of the first gluing mechanism 15, and the tab welding mechanism 17 is disposed downstream of the hot pressing device 16.

[0291] The first gluing mechanism 15 can apply finishing glue or 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.

[0292] According to some embodiments of the present application, please refer to Figures 1 to 18.

[0293] An 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 a first electrode 21. The second transfer mechanism 12 is used to transfer a second electrode 22, which has a polarity opposite to that of the first electrode 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 electrode 21, the isolation film 23, and the second electrode 22, and stack the first electrode 21, the isolation film 23, and the second electrode 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 electrode 21, the second electrode 22 and the isolation film 23 to the stacking device 13. The stacking device 13 can stack the first electrode 21, the isolation film 23 and the second electrode 22 to form a battery cell 20, thereby realizing automated stacking, which is beneficial to improving stacking quality and production efficiency.

[0294] The separator film unwinding mechanism 14 has an output portion 141 for outputting the separator film 23. The laminating device 13 includes a laminating platform 131 and a first driving mechanism 132. The laminating platform 131 has a first laminating position 138 and a second laminating position 139. Along a first direction, the first laminating position 138 and the second laminating position 139 are located on either side of the output portion 141. The laminating platform 131 is configured to receive the first pole piece 21 at the first laminating position 138 and the second pole piece 22 at the second laminating position 139. The first driving mechanism 132 is configured to drive the laminating platform 131 to move along the first direction, switching the laminating platform 131 between the first laminating position 138 and the second laminating position 139. The first driving mechanism 132 is capable of driving the laminating platform 131 to switch between the first laminating position 138 and the second laminating position 139. When the laminating platform 131 is at the first laminating position 138, it is located on one side of the output portion 141 along the first direction. When the stacking platform 131 is in the second stacking position 139, it is located on the other side of the output section 141 along the first direction. The stacking platform 131 can receive the first electrode 21 at the first stacking position 138, and one end of the isolation film 23 can be positioned on the stacking platform 131. During the process of switching the stacking platform 131 from the first position to the second position, since the first and second stacking positions 138, 139 are located on either side of the output section 141, the isolation film 23 gradually covers the first electrode 21. The stacking platform 131 reaches the second position, receives the second electrode 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 and second stacking positions 138, 139 are located on either side of the output section 141, the isolation film 23 gradually covers the second electrode 22. The stacking platform 131 then returns to the first position and can receive the first electrode 21 again. As the lamination platform 131 switches back and forth between the first position and the second position, the first electrode sheet 21 , the isolation membrane 23 and the second electrode sheet 22 are gradually stacked, thereby forming the battery cell 20 .

[0295] The lamination device 13 includes a pressing mechanism 133, which is provided on the lamination platform 131. The pressing mechanism 133 is used to press the first pole piece 21, the isolation membrane 23, or the second pole piece 22 against the lamination platform 131. By providing the pressing mechanism 133, the first pole piece 21, the isolation membrane 23, or the second pole piece 22 are pressed against the lamination platform 131 during the process of switching the lamination platform 131 between the first position and the second position, thereby reducing the risk of the first pole piece 21, the isolation membrane 23, or the second pole piece 22 detaching from the lamination platform 131. This is conducive 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.

[0296] The lamination system 10 includes a first gluing mechanism 15 , which is located downstream of the lamination device 13 and is used to apply finishing tape or corner tape to the battery cells 20. By providing the first gluing mechanism 15 , after the lamination device 13 completes lamination to form the battery cells 20, the finishing tape or corner tape is applied to the battery cells 20, thereby stabilizing the shape of the battery cells 20 and reducing the risk of cell 20 failure.

[0297] The first gluing mechanism 15 includes a glue material unwinding mechanism 151, a gluing 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 feed 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 glue, and the gluing assembly 152 is used to stick the glue 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 feeds 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 glue. The gluing assembly 152 can stick the glue to the battery cell 20 to complete the finishing glue or corner glue. The first gluing mechanism 15 is used to perform the gluing operation, and the required length of glue can be unwound each time as needed and attached to the battery cell 20. In this way, the length of the glue is more appropriate, which can effectively stabilize the shape of the battery cell 20, reduce the risk of the battery cell 20 collapsing, and is less likely to interfere with other components.

[0298] The lamination system 10 includes a hot pressing device 16, which is located downstream of the lamination device 13 and is used to hot press the battery cells 20. The provision of the hot pressing device 16 to hot press the battery cells 20 improves the flatness of the battery cells 20, ensuring that the thickness of the battery cells 20 meets requirements and has a high degree of consistency. Furthermore, it reduces wrinkles in the separator 23, expelling air from the battery cells 20, and closely adhering the separator 23 to the first electrode 21 and the second electrode 22. This shortens the diffusion distance of metal ions and reduces the internal resistance of the battery cells 20.

[0299] 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 to the battery cells 20. The tab welding mechanism 17 facilitates automatic tab welding of the battery cells 20, thereby improving the automation level of the lamination system 10.

[0300] 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 located at the first workstation and is used to provide the first tab 24. The second tab providing mechanism is located at the second workstation and is used to provide the second tab 25. The first welding mechanism 173 is located at the third workstation and is used to weld the first tab 24 to the first electrode sheet 21. The second welding mechanism is located at the fourth workstation and is used to weld the second tab 25 to the second electrode sheet 22. The conveying mechanism 175 is used to transport the battery cell 20 to the first, second, third, and fourth workstations. The conveying mechanism 175 transports the battery cell 20 to the first, second, third, and fourth workstations. As the battery cell 20 passes through the first workstation, 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 electrode tab 25 providing mechanism provides the second electrode 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 electrode tab 24 to the battery cell 20. When the battery cell 20 passes through the fourth station, the second welding mechanism welds the second electrode tab 25 to the battery cell 20, thereby completing the automatic welding of the first electrode sheet 21 and the battery cell 20, and the automatic welding of the second electrode sheet 22 and the battery cell 20, with a high degree of automation.

[0301] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A lamination system, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: Along the third direction, the pressing members are arranged on both sides of the lamination platform.

6. The lamination system according to claim 4 or 5, wherein: 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 any one of claims 2 to 6, wherein: 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, wherein: 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, wherein: The first smoothing member is made of a flexible material.

10. The lamination system according to claim 8 or 9, wherein: The output part is connected to the frame.

11. The lamination system according to any one of claims 2 to 10, wherein: 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, wherein: 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, wherein: 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, wherein: 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 any one of claims 1 to 14, wherein: 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 any one of claims 1 to 15, wherein: 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, wherein: 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 second picking unit The thickness of the second pole piece picked up in a single time is used to obtain the number of the second pole pieces.

18. The lamination system according to any one of claims 1 to 17, wherein: 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, wherein: 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, wherein: 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, wherein: 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 or 21, wherein: 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 any one of claims 20 to 22, wherein: 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 23, wherein: 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, wherein: 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, wherein: 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 or 26, wherein: 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, wherein: The anti-stick coating includes a ceramic layer.

29. The lamination system according to any one of claims 1 to 28, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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. A lamination system according to any one of claims 30 to 33, wherein: 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 any one of claims 30 to 34, wherein: 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 of claim 35, wherein: 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. A lamination system according to any one of claims 1 to 36, wherein: 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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