Lamination device

Abstract

The utility model relates to a lamination device which comprises a lamination table and a discharging clamp, the lamination table is used for bearing laminations, the discharging clamp is used for clamping the laminations on the lamination table and moving the laminations to the next working procedure, the lamination table is provided with an avoiding groove, and the avoiding groove can contain at least part of the discharging clamp; along the first direction, an adsorption part is arranged on the surface, in contact with the lamination, of the lamination table, and the adsorption part is used for adsorbing the lamination. According to the stacking device, the adsorption part is arranged on the stacking table, the adsorption part can adsorb the surface (marked as the lower surface) of the side, close to the stacking table, of the lamination, and the adsorption force of the adsorption part on the lower surface can support and tighten the lower surface, so that the risk that the lamination is bent and sunken into the avoiding groove is reduced, the risk that the lamination is wrinkled is reduced, and the stacking efficiency is improved. And the quality of the lamination and the lithium battery is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium batteries, and particularly relates to a lamination device. BACKGROUND

[0002] In the processing of lithium batteries, positive electrode sheets, negative electrode sheets and separators are stacked into a lamination in layers, and then the lamination is wound into a pole roll, and then subsequent processes such as tab welding, electrolyte injection and packaging are performed.

[0003] In the lamination process, the positive electrode sheets, the negative electrode sheets and the separators are stacked on a lamination table, and then the lamination is clamped by a blanking clamp and transported to a winding mechanism. The lamination table is usually provided with a groove, and the lower clamping jaw of the blanking clamp extends into the groove and abuts against the lower surface of the lamination, and the upper clamping jaw abuts against the upper surface of the lamination from above, so as to clamp the lamination.

[0004] Since multiple grooves are arranged on the lamination table, as the number of stacked layers increases in the lamination process, the weight of the lamination gradually increases, and the lamination at the groove is in a suspended state. Therefore, the lamination above the groove has a risk of bending and collapsing into the groove, which greatly increases the risk of wrinkles in the lamination, and affects the quality of the lamination and the lithium battery. CONTENT OF THE INVENTION

[0005] The present application relates to a lamination device which can reduce the risk of lamination bending and collapsing, thereby improving the quality of the lamination and the lithium battery.

[0006] The present application provides a lamination device, which comprises a lamination table and a blanking clamp. The lamination table is used for carrying a lamination, and the blanking clamp is used for clamping the lamination on the lamination table and moving the lamination to the next process. The lamination table is provided with a relief groove which can accommodate at least part of the blanking clamp. The surface of the lamination table used for contacting the lamination is provided with an adsorption part which is used for adsorbing the lamination.

[0007] In the present application, the adsorption part is arranged on the lamination table, and the adsorption part can adsorb the surface (referred to as the lower surface) of the lamination close to the lamination table. The adsorption force of the adsorption part on the lower surface can support and tighten the lower surface, thereby reducing the risk of the lamination bending and collapsing into the relief groove, reducing the risk of wrinkles in the lamination, and improving the quality of the lamination and the lithium battery.

[0008] In a possible design, along a first direction, the adsorption part is located on the side of the lamination table close to the blanking clamp, and the first direction is the distribution direction of the lamination table and the blanking clamp. The lamination device comprises a supporting plate, which is located on the side of the lamination table away from the blanking clamp along the first direction. The supporting plate comprises a supporting plane which is used for supporting the end of the lamination away from the blanking clamp.

[0009] In a possible design, the laminated sheet includes a diaphragm, the diaphragm includes a first extension end, in the first direction, the first extension end is located on a side of the laminated sheet close to the material clamp; the laminated sheet device includes a first suction accessory, in the first direction, the first suction accessory is located on a side of the laminated sheet close to the material clamp, and the first suction accessory is used for adsorbing and fixing the first extension end when the laminated sheet is located on the laminated table; the laminated sheet device further includes a cutting assembly, in the first direction, the cutting assembly is located between the laminated table and the first suction accessory, and the cutting assembly is used for cutting off the first extension end; in the second direction, the cutting assembly is located on a side of the laminated sheet facing the laminated table, and the second direction is the thickness direction of the laminated sheet, and the second direction is perpendicular to the first direction.

[0010] In a possible design, the laminated sheet device further includes a third driving member and a first pressing plate, the third driving member is in driving connection with the first pressing plate, in the second direction, the first pressing plate is located on a side of the laminated sheet away from the laminated table, and in the second direction, the third driving member can drive the first pressing plate to move towards the laminated sheet to press and fix the laminated sheet.

[0011] In a possible design, the laminated sheet device includes a fourth driving member, the fourth driving member is in driving connection with the material clamp, and the fourth driving member can drive the material clamp to move close to or away from the laminated sheet in the first direction; the laminated sheet device further includes a first screw rod, one end of the first screw rod is in driving connection with the fourth driving member, the other end of the first screw rod is in threaded connection with the material clamp, the fourth driving member can drive the first screw rod to rotate around the axis of the first screw rod, and the first screw rod can drive the material clamp to move in the first direction.

[0012] In a possible design, the laminated sheet includes a diaphragm, the diaphragm includes a second extension end, in the first direction, the second extension end is located on a side of the laminated sheet away from the material clamp, and the first suction accessory is used for adsorbing and fixing the second extension end; the laminated sheet device further includes a cutting assembly, in the first direction, the cutting assembly is located between the laminated table and the first suction accessory, and the cutting assembly is used for cutting off the second extension end; the laminated sheet device further includes a fifth driving member and a second pressing plate, the fifth driving member is in driving connection with the second pressing plate, in the first direction, the second pressing plate is located between the laminated table and the cutting assembly, in the second direction, the second pressing plate is located on a side of the second extension end away from the laminated table, and in the second direction, the fifth driving member can drive the second pressing plate to move towards the second extension end to press and fix the second extension end.

[0013] In a possible design, the laminated sheet device further includes a second suction accessory, in the first direction, the second suction accessory is located between the first suction accessory and the material clamp, and the second suction accessory is used for adsorbing and fixing the second extension end; the laminated sheet device further includes a sixth driving member, the sixth driving member is in driving connection with the second suction accessory, and the sixth driving member can drive the second suction accessory to move in the first direction, so that the second suction accessory moves synchronously with the material clamp in the first direction.

[0014] In a possible design, the laminated sheet includes positive electrode laminated sheets, negative electrode laminated sheets and separators arranged in a laminated manner along the second direction; the blanking clamp at least includes a first clamping jaw and a second clamping jaw distributed along the second direction, the first clamping jaw being located on a side of the laminated sheet facing the stacking table, and the first clamping jaw being configured to contact the positive electrode laminated sheet, the negative electrode laminated sheet or the separator.

[0015] In a possible design, when the first clamping jaw is configured to contact the separator, the blanking clamp further includes a third suction member, the third suction member being located on the side of the laminated sheet facing the stacking table along the second direction, and the third suction member being configured to adsorb and fix the separator.

[0016] In a possible design, the first clamping jaw includes a first mounting plate, and the first clamping jaw and the third suction member are both mounted on the first mounting plate; and the first clamping jaw has a V-shaped, L-shaped or Z-shaped structure.

[0017] It should be understood that the general description above and the detailed description below are only examples and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure schematic diagram of the laminated sheet in an embodiment;

[0019] Figure 2 A structure schematic diagram of the laminated sheet device provided in the present application in an embodiment;

[0020] Figure 3 A structure schematic diagram of the laminated sheet in another embodiment; Figure 2 A structure schematic diagram of the stacking table in the laminated sheet device in an embodiment;

[0021] Figures 4 to 10 A laminated sheet flow schematic diagram of the laminated sheet device in an embodiment;

[0022] Figure 11 A structure schematic diagram of the blanking clamp in the laminated sheet device in an embodiment; Figure 2

[0023] A structure schematic diagram of the blanking clamp in another embodiment; Figure 12

[0024] A structure schematic diagram of the laminated sheet device provided in the present application in another embodiment; Figure 13

[0025] A structure schematic diagram of the blanking clamp in the laminated sheet device in an embodiment; Figure 14 Figure 13 A front view of the blanking clamp in the laminated sheet device;

[0026] Figure 15 Figure 14 A front view of the blanking clamp in the laminated sheet device;

[0027] Figure 16 A front view of the blanking clamp in the laminated sheet device; Figure 14 ​​Fig. 3 is a left view of the unloading clamp in Fig. 1.

[0028] Reference signs:

[0029] 01- unwinding mechanism; 02- winding mechanism; 021- winding clamp jaw; 022- rotating motor; 1- sheet; 11- positive sheet; 12- negative sheet; 13- diaphragm; 131- first extension end; 132- second extension end;

[0030] 2- stacking table; 21- avoiding groove; 3- unloading clamp; 31- first clamp jaw; 32- second clamp jaw; 33- third suction accessory; 34- first mounting plate; 35- second mounting plate; 36- third mounting plate; 37- eighth driving member; 38- fixed rod; 4- first suction assembly; 41- first suction accessory; 42- first driving member; 5- supporting plate; 51- supporting plane; 6- cutting member; 7- third driving member; 8- first pressing plate; 9- fourth driving member; 1A- first screw rod; 1B- fifth driving member; 1C- second pressing plate; 1D- second suction assembly; 1D1- second suction accessory; 1D2- sixth driving member; 1D3- seventh driving member; 1D4- fourth fixed plate; 1E- suction part.

[0031] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. DETAILED DESCRIPTION

[0032] For better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0033] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0034] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0035] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0036] It should be noted that the "upper", "lower", "left", "right" and other orientation words described in the embodiments of the present application are described in the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, it should be understood in the context that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element.

[0037] The embodiments of the present application provide a stacking device for stacking the positive electrode sheet 11, the negative electrode sheet 12 and the separator 13 into Figure 1 or Figure 12 The stacking device shown in the stacking device 1, the structure of the stacking device is shown in Figure 1 The stacking device includes a stacking table 2 and a blanking clamp 3, the stacking table 2 is used to carry the stacking 1, the blanking clamp 3 is used to clamp the stacking 1 on the stacking table 2, and is used to move the stacking 1 to the next process, that is, to the winding mechanism 02. As shown in Figure 3 The stacking table 2 is provided with a avoiding groove 21, the avoiding groove 21 can accommodate at least part of the blanking clamp 3; the surface of the stacking table 2 used to contact the stacking 1 is provided with an adsorption part 1E, the adsorption part 1E is used to adsorb the stacking 1.

[0038] In the embodiment, the avoiding groove 21 can facilitate the blanking clamp 3 to extend into the lower part of the stacking 1, so as to facilitate the blanking clamp 3 to clamp the stacking 1. The adsorption part 1E is arranged on the surface of the stacking table 2 used to contact the stacking 1, the adsorption part 1E can adsorb the surface (referred to as the lower surface) of the side of the stacking 1 close to the stacking table 2, the adsorption force of the adsorption part 1E on the lower surface can support and tighten the lower surface, thereby reducing the risk of bending and recessing of the stacking 1 into the avoiding groove 21, thereby reducing the risk of wrinkles of the stacking 1, and further improving the quality of the stacking 1 and the lithium battery.

[0039] Among them, the adsorption part 1E can be an electrostatic adsorption module or a vacuum adsorption module, in the embodiments of the present application, the adsorption part 1E is a vacuum adsorption hole, so as to reduce the size of the adsorption part 1E.

[0040] In one embodiment, the stacking table 2 is provided with the adsorption part 1E on both sides in the first direction X, the first direction X is the distribution direction of the stacking table 2 and the blanking clamp 3, that is, the adsorption parts 1E on both sides can simultaneously adsorb the lower surface of the stacking 1, thereby improving the support and tightening effect of the adsorption part 1E on the stacking 1, and further improving the quality of the stacking 1 and the lithium battery.

[0041] In another embodiment, as shown in Figure 2 and Figure 3As shown, in the first direction X, the adsorption part 1E is located on the side of the stacking platform 2 close to the unloading clamp 3. The stacking device includes a support plate 5. Along the first direction X, the support plate 5 is located on the side of the stacking platform 2 away from the unloading clamp 3. The support plate 5 includes a supporting surface 51. The supporting surface 51 is used to support the end of the stacked piece 1 away from the unloading clamp 3. That is, one end of the lower surface of the stacked piece 1 is vacuum adsorbed by the adsorption part 1E, and the other end is supported by the supporting surface 51 of the support plate 5.

[0042] In this embodiment, the tray 5 contacts the lower surface of the stack 1 through the supporting plane 51. Since the supporting plane 51 does not have any recessed structures such as grooves, the tray 5 can provide a flat supporting effect on the other end of the stack 1, thereby further reducing the risk of the stack 1 bending and sinking into the relief groove 21, thus reducing the risk of wrinkles in the stack 1, and thus improving the quality of the stack 1 and the lithium battery.

[0043] by Figure 1 Taking the stacked sheet 1 as an example, during the stacking process of the positive electrode 11, the negative electrode 12, and the separator 13, as shown... Figure 4 As shown, first place the positive electrode 11 or negative electrode 12 on the stacking platform 2. Taking the positive electrode 11 as an example, the support plate 5 supports one end of the positive electrode 11, and the other end of the positive electrode 11 is attracted and tightened by the adsorption part 1E on the stacking platform 2. Then, pull the diaphragm 13 on the unwinding mechanism 01 above the positive electrode 11. To facilitate the pulling of the diaphragm 13, as shown... Figure 4 As shown, the diaphragm 13 includes a first extension end 131, which is located on the side of the stack 1 near the unloading clamp 3 in the first direction X; as Figure 2 , Figure 3 and Figure 4 As shown, the stacking device includes a first adsorption assembly 4, which includes at least a first adsorption member 41. Along the first direction X, the first adsorption member 41 is located on the side of the stacking platform 2 near the unloading clamp 3. When the stacked sheet 1 is located on the stacking platform 2, the first adsorption member 41 is used to adsorb and fix the first extension end 131. After the diaphragm 13 covers the surface of the positive electrode sheet 11, as... Figure 5 As shown, the negative electrode 12 is stacked on the side of the diaphragm 13 away from the positive electrode 11. Then, the steps of pulling the diaphragm 13 and placing the electrode are repeated, as shown. Figure 6 and Figure 7 As shown, increase the number of layers in stack 1 until the number of layers in stack 1 meets the requirements.

[0044] In this embodiment, the adsorption of the first adsorption member 41 on the first extension end 131 can keep the diaphragm 13 in a taut state, reducing the risk of the diaphragm 13 being pulled when stacking the positive electrode 11 and the negative electrode 12, thereby reducing the risk of wrinkles appearing inside the stack 1.

[0045] Among them, such asFigure 2 and Figure 3 As shown, the first adsorption component 4 also includes a first driving member 42, which is drivenly connected to the first adsorption member 41. The first driving member 42 can drive the first adsorption member 41 to move closer to or away from the stack 1 along the second direction Z. The second direction is the thickness direction of the stack 1, and the second direction Z is perpendicular to the first direction X.

[0046] In this embodiment, before the feeding clamp 3 moves toward the stacked sheet 1 along the first direction X, the first driving member 42 drives the first adsorption member 41 away from the stacked sheet 1 along the second direction Z, so that the first adsorption member 41 avoids the feeding clamp 3, thereby reducing the risk that the feeding clamp 3 will be unable to properly clamp the stacked sheet 1 due to the interference of the first adsorption member 41 with the movement of the feeding clamp 3, thus improving the working stability of the feeding clamp 3. At the same time, it reduces the risk of the first adsorption member 41 or the feeding clamp 3 being damaged due to collision with the feeding clamp 3, which is conducive to extending the service life of the first adsorption member 41 and the feeding clamp 3.

[0047] After completing the stacking operation of the positive electrode 11, the negative electrode 12, and the separator 13, the stacking device also includes a cutting assembly, such as... Figure 8 As shown, the cutting assembly includes at least a cutting element 6. Along the first direction X, the cutting assembly is located between the stack 2 and the first adsorption element 41. The cutting element 6 is used to cut off the first extension end 131.

[0048] In this embodiment, the first extension end 131 is cut off by the cutting member 6, thereby reducing the length of the diaphragm 13 extending outside the stack 1, thereby reducing the risk of the first extension end 131 being stacked inside the stack 1 and wrinkling during the winding process.

[0049] Among them, such as Figure 8 As shown, along the second direction Z, the cutting assembly is located on the side of the stack 1 facing the stack 2. The second direction Z is the thickness direction of the stack 1 and is perpendicular to the first direction X.

[0050] In this embodiment, the cutting assembly is located below the stack 1, so that the cutting member 6 can move along the edge of the bottom positive electrode 11 and cut off the first extension end 131, so as to further reduce the length of the separator 13 extending outside the stack 1.

[0051] In addition, the cutting assembly also includes a second driving member (not shown in the figure), which is driven to the cutting member 6. The second driving member can control the cutting member 6 to move closer to or away from the stacked sheet 1 along the second direction Z, so as to realize the cutting member 6 cutting the diaphragm 13.

[0052] The cutting element 6 can be a blade or a hot-cutting wire. In this embodiment, the cutting element 6 is a hot-cutting wire to improve cutting efficiency and quality.

[0053] As shown in Figure 2 , Figure 3 and Figure 8 , the lamination device further comprises a third driving member 7 and a first pressing plate 8, the third driving member 7 is in driving connection with the first pressing plate 8, and the first pressing plate 8 is located on the side of the lamination 1 away from the lamination table 2 along the second direction Z. The third driving member 7 can drive the first pressing plate 8 to move towards the lamination 1 along the second direction Z to press and fix the lamination 1.

[0054] In this embodiment, when the cutting member 6 cuts the first extension end 131, the first pressing plate 8 presses and fixes the lamination 1, which reduces the risk of the lamination 1 moving and bending under the driving of the cutting member 6, thereby reducing the risk of the lamination 1 being wrinkled and the risk of the cutting member 6 failing, and improving the working reliability of the cutting member 6.

[0055] As shown in Figure 2 and Figure 3 , the first pressing plate 8 is opposite to the supporting plate 5 along the second direction Z, that is, the first pressing plate 8 and the supporting plate 5 can clamp one end of the lamination 1 along the second direction Z, thereby reducing the risk of the lamination 1 being recessed into the avoiding groove 21 when the first pressing plate 8 is pressed.

[0056] As shown in Figure 9 , after the cutting member 6 cuts off the first extension end 131, the first pressing plate 8 cancels the pressing of the lamination 1, at the same time, the first driving member 42 drives the first suction member 41 to move away from the lamination 1, and the second driving member drives the cutting member 6 to move away from the lamination 1. The blanking clamp 3 approaches the lamination 1 along the first direction X and clamps the lamination 1. The second driving member drives the cutting member 6 to move away from the lamination 1, which reduces the risk of interference between the cutting member 6 and the blanking clamp 3, thereby improving the working stability of the blanking clamp 3, and also being beneficial to prolong the service life of the cutting member 6 and the blanking clamp 3.

[0057] As shown in Figure 2 , the lamination device comprises a fourth driving member 9, the fourth driving member 9 is in driving connection with the blanking clamp 3, and the fourth driving member 9 can drive the blanking clamp 3 to approach or move away from the lamination 1 along the first direction X. As shown in Figure 2 and Figure 9 , the fourth driving member 9 drives the blanking clamp 3 to approach the lamination 1 along the first direction X until at least part of the blanking clamp 3 is inserted into the avoiding groove 21 and clamps the lamination 1. Thereafter, as shown in Figure 2 and Figure 10 , the fourth driving member 9 drives the blanking clamp 3 to move away from the lamination 1 along the first direction X.

[0058] In one embodiment, the fourth driving member 9 is directly connected with the blanking clamp 3 to simplify the connection mode of the fourth driving member 9 and the blanking clamp 3.

[0059] In another embodiment, as shown in Figure 2 , the fourth driving member 9 is connected with the first driving member 42, and the fourth driving member 9 is in driving connection with the blanking clamp 3 through the first driving member 42.As shown, the laminating device further comprises a first screw rod 1A, one end of the first screw rod 1A is drivingly connected with the fourth driving member 9, and the other end of the first screw rod 1A is threadedly connected with the blanking clamp 3, the fourth driving member 9 can drive the first screw rod 1A to rotate around its own axis, and the first screw rod 1A can drive the blanking clamp 3 to move along the first direction X.

[0060] In the embodiment, the fourth driving member 9 drives the blanking clamp 3 to move by controlling the rotation of the first screw rod 1A, the fourth driving member 9 can accurately control the number of rotations of the first screw rod 1A, and in turn accurately control the moving distance of the blanking clamp 3, that is, through the thread cooperation between the first screw rod 1A and the blanking clamp 3, the control accuracy of the moving distance of the blanking clamp 3 can be improved.

[0061] In addition, as shown, Figure 2 As shown, along the third direction Y, both ends of the blanking clamp 3 are connected with fixed rods 38, and in the third direction Y, the first screw rod 1A is located between the two fixed rods 38, and the third direction Y is perpendicular to the first direction X and the second direction Z.

[0062] In the embodiment, the fixed rods 38 can reduce the risk of the blanking clamp 3 rotating around the first screw rod 1A, thereby improving the stability of the movement of the blanking clamp 3 in the first direction X.

[0063] As shown, Figure 2 and Figure 10 As shown, in the process that the fourth driving member 9 drives the blanking clamp 3 to move away from the laminates 1 along the first direction X, the blanking clamp 3 pulls the laminates 1, so that the laminates 1 gradually move away from the stacking table 2, at this time, the material on the unwinding mechanism 01 continues to be unwound under the pulling of the blanking clamp 3, so that part of the diaphragm 13 covers on the stacking table 2 to form the second extending end 132 of the diaphragm 13, as shown, Figure 10 As shown, in the first direction X, the second extending end 132 is located on the side of the laminates 1 away from the blanking clamp 3, and when the blanking clamp 3 moves the laminates 1 to the side away from the stacking table 2 of the first suction member 41, the first suction member 41 is used to adsorb and fix the second extending end 132; the cutting member 6 located between the stacking table 2 and the first suction member 41 can cut off the second extending end 132, so as to facilitate the next stacking.

[0064] As shown, Figure 2 , Figure 3 and Figure 10 As shown, the laminating device further comprises a fifth driving member 1B and a second pressing plate 1C, the fifth driving member 1B is drivingly connected with the second pressing plate 1C, along the first direction X, the second pressing plate 1C is located between the stacking table 2 and the cutting assembly, along the second direction Z, the second pressing plate 1C is located on the side of the second extending end 132 away from the stacking table 2, and along the second direction Z, the fifth driving member 1B can drive the second pressing plate 1C to move towards the second extending end 132 to press and fix the second extending end 132.

[0065] In the embodiment, before the cutting member 6 cuts off the second extending end 132, the fifth driving member 1B drives the second pressing plate 1C to press down and fix the second extending end 132, that is, one side of the second extending end 132 is fixed by the second pressing plate 1C and the stacking table 2, and the other side is fixed by the first suction member 41, so as to facilitate the cutting member 6 to cut off the second extending end 132, reduce the risk that the second extending end 132 follows the movement of the cutting member 6 in the working process of the cutting member 6, and further improve the working reliability of the cutting member 6.

[0066] As shown in Figure 2 , Figure 3 and Figure 10 , the laminating device further comprises a second suction assembly 1D, the second suction assembly 1D at least comprises a second suction member 1D1, the second suction member 1D1 is located between the first suction member 41 and the blanking clamp 3 along the first direction X, and the second suction member 1D1 is used for suction fixing the second extending end 132; the laminating device further comprises a sixth driving member 1D2, the sixth driving member 1D2 is drivingly connected with the second suction member 1D1, and the sixth driving member 1D2 can drive the second suction member 1D1 to move along the first direction X, so that the second suction member 1D1 moves synchronously with the blanking clamp 3 along the first direction X.

[0067] In the embodiment, after cutting off the second extending end 132, the blanking clamp 3 clamps the laminated sheet 1 to move away from the stacking table 2 along the first direction X and gradually approaches the winding mechanism 02, at the same time, the second suction member 1D1 suction fixes the second extending end 132 and moves synchronously with the blanking clamp 3 along the first direction X, the suction force of the second suction member 1D1 on the second extending end 132 makes the diaphragm 13 always keep in a taut state, so as to reduce the risk that the diaphragm 13 appears wrinkles in the winding process, so as to improve the quality of the lithium battery.

[0068] As shown in Figure 2 , the second suction assembly 1D further comprises a fourth fixed plate 1D4, the second suction member 1D1 is installed on the fourth fixed plate 1D4, and the laminating device further comprises a second lead screw, one end of the second lead screw is drivingly connected with the sixth driving member 1D2, the other end of the second lead screw is threadedly connected with the fourth fixed plate 1D4, the sixth driving member 1D2 can drive the second lead screw to rotate around its own axis, and the rotation of the second lead screw can drive the fourth fixed plate 1D4 to move along the first direction X, so as to realize the synchronous movement of the second suction member 1D1 and the blanking clamp 3 along the first direction X.

[0069] In the embodiment, the sixth driving member 1D2 drives the fourth fixed plate 1D4 to move by controlling the rotation of the second lead screw, the sixth driving member 1D2 can accurately control the rotation number of the second lead screw, and further accurately control the moving distance of the fourth fixed plate 1D4, that is, through the thread cooperation between the second lead screw and the fourth fixed plate 1D4, the control accuracy of the moving distance of the second suction member 1D1 can be improved.

[0070] As shown in Figure 2 and Figure 3 , the second adsorption assembly 1D further comprises a seventh driving member 1D3, the seventh driving member 1D3 is installed on the fourth fixed plate 1D4, the seventh driving member 1D3 is drivingly connected with the second adsorption member 1D1, and the seventh driving member 1D3 can drive the second adsorption member 1D1 to move towards or away from the stack 1 along the second direction Z. During the process that the blanking clamp 3 moves towards the stack 2 along the first direction X, the seventh driving member 1D3 can drive the second adsorption member 1D1 to move away from the stack 1 along the second direction Z, so as to reduce the risk of interference between the second adsorption member 1D1 and the blanking clamp 3, thereby improving the stability of the movement of the blanking clamp 3 and facilitating the prolongation of the service life of the second adsorption member 1D1 and the blanking clamp 3.

[0071] When the stack 1 has the structure as shown in Figure 1 , that is, the part of the stack 1 for contacting the stack 2 is the positive electrode sheet 11 or the negative electrode sheet 12, at this time, the structure of the blanking clamp 3 can be as shown in Figure 11 . The blanking clamp 3 comprises a first clamping jaw 31 and a second clamping jaw 32 distributed along the second direction Z, the first clamping jaw 31 is located on the side of the stack 1 facing the stack 2, and the first clamping jaw 31 is used for contacting the positive electrode sheet 11 or the negative electrode sheet 12, and the second clamping jaw 32 is located on the side of the stack 1 away from the stack 2, and the second clamping jaw 32 is used for contacting the positive electrode sheet 11, the negative electrode sheet 12 or the separator 13.

[0072] The blanking clamp 3 further comprises a first mounting plate 34 and a second mounting plate 35, the first mounting plate 34 is oppositely arranged on both sides of the second mounting plate 35 along the second direction Z, and the first clamping jaw 31 and the second clamping jaw 32 are respectively installed on the first mounting plate 34.

[0073] Among them, the first mounting plate 34 can move relative to the second mounting plate 35 along the second direction Z, so that the first clamping jaw 31 and / or the second clamping jaw 32 can move along the second direction Z, so as to adjust the distance between the first clamping jaw 31 and the second clamping jaw 32 along the second direction Z, thereby improving the clamping force of the blanking clamp 3 on the stack 1.

[0074] In an embodiment, the first screw rod 1A is directly threadedly connected with the second mounting plate 35, so as to simplify the structure of the blanking clamp 3.

[0075] In another embodiment, the blanking clamp 3 further comprises a third mounting plate 36, the second mounting plate 35 is installed on the third mounting plate 36, and the first screw rod 1A is threadedly connected with the third mounting plate 36.

[0076] Since the first clamping jaw 31 is located below the laminated sheet 1 and the first clamping jaw 31 is in contact with the positive electrode sheet 11 or the negative electrode sheet 12 of the laminated sheet 1, the positive electrode sheet 11 or the negative electrode sheet 12 has a certain hardness, and when the first clamping jaw 31 and the second clamping jaw 32 clamp the laminated sheet 1, the deformation degree of the lowermost positive electrode sheet 11 or negative electrode sheet 12 is smaller, so that the blanking clamp 3 clamps Figure 1 the laminated sheet 1 shown in the figure, the risk of bending deformation of the laminated sheet 1 is smaller. At this time, the contour shape of the first clamping jaw 31 and the second clamping jaw 32 can be Figure 11 rectangular as shown in the figure, so as to simplify the structure of the blanking clamp 3.

[0077] When the laminated sheet 1 is Figure 12 the structure shown in the figure, that is, the part of the laminated sheet 1 used to contact the laminated table 2 is the diaphragm 13, at this time, when the blanking clamp 3 clamps the laminated sheet 1, the edge of the diaphragm 13 is in a suspended state, which causes the edge of the diaphragm 13 to bend and deform downward, and at the same time, in the process of the first clamping jaw 31 contacting the diaphragm 13, there is also a risk that the diaphragm 13 will be wrinkled by the friction of the first clamping jaw 31. Therefore, as Figure 13 and Figure 14 shown in the figure, in the embodiment of the present application, the blanking clamp 3 further comprises a third suction accessory 33, which is located on the side of the laminated sheet 1 facing the laminated table 2 along the second direction Z, and the third suction accessory 33 is used to adsorb and fix the diaphragm 13.

[0078] In the embodiment, when the first clamping jaw 31 extends to below the laminated sheet 1, the third suction accessory 33 can adsorb and fix the diaphragm 13, so that the diaphragm 13 at the bottom remains taut, reducing the risk of bending and wrinkling of the diaphragm 13 in the process of the first clamping jaw 31 contacting the diaphragm 13 and the blanking clamp 3 clamping the laminated sheet 1, thereby improving the quality of the laminated sheet 1 and the lithium battery.

[0079] In one embodiment, the third suction accessory 33 is provided on the first clamping jaw 31.

[0080] In another embodiment, the third suction accessory 33 is provided on the first fixed plate, at this time, as Figure 14 shown in the figure, the first clamping jaw 31 is V-shaped, L-shaped, Z-shaped or other deformed structure, so as to increase the installation space of the third suction accessory 33 in the second direction Z, thereby reducing the installation difficulty of the third suction accessory 33.

[0081] As Figure 14 and Figure 15 shown, the first fixed plate is provided with an eighth driving member 37, the eighth driving member 37 is drivingly connected with the third suction accessory 33, and the eighth driving member 37 can drive the third suction accessory 33 to move along the second direction Z, so that the third suction accessory 33 is close to or away from the laminated sheet 1, so as to adjust the adsorption effect of the third suction accessory 33 on the diaphragm 13.

[0082] The first suction accessory 41, the second suction accessory 1D1 and the third suction accessory 33 can be electrostatic suction or vacuum suction, etc.

[0083] In any of the above embodiments, as shown in Figure 2 The winding mechanism 02 includes winding clamps 021 arranged on both sides of the blanking clamp 3 along the third direction Y, and the winding clamps 021 are drivingly connected with a rotating motor 022. After the winding clamps 021 clamp the laminated sheet 1, the rotating motor 022 drives the winding clamps 021 on both sides to rotate synchronously, thereby realizing the winding process of the laminated sheet 1.

[0084] The winding clamps 021 can move along the second direction Y under the driving of the driving member, so as to make the winding clamps 021 close to or away from the laminated sheet 1. The movement direction of the winding clamps 021 can be controlled through the cooperation of the slide rail and the sliding block, so as to improve the accuracy of the movement direction of the winding clamps 021. The movement distance of the winding clamps 021 can also be accurately controlled through the cooperation of the driving member and the lead screw.

[0085] In summary, the working process of the laminated sheet device in one embodiment provided by the present application is as follows:

[0086] As shown in Figure 3 and Figure 4 The positive electrode sheet 11 is placed on the stacking table 2, and one end of the positive electrode sheet 11 is carried by the supporting plate 5 along the first direction X, and the other end is vacuum-sucked by the suction part 1E on the stacking table 2.

[0087] The winding material on the unwinding mechanism 01 is pulled out, so that the diaphragm 13 covers the positive electrode sheet 11, and the first extension end 131 of the diaphragm 13 is sucked and fixed by the first suction accessory 41.

[0088] As shown in Figure 5 The negative electrode sheet 12 is placed on the diaphragm 13.

[0089] As shown in Figure 6 The winding material is pulled again, so that the diaphragm 13 covers the negative electrode sheet 12.

[0090] The steps shown in Figure 5 and Figure 6 are repeated until the number of layers of the laminated sheet 1 meets the requirement, for example, Figure 7 .

[0091] As shown in Figure 2 and Figure 8 The third driving member 7 drives the first pressing plate 8 to approach and press the laminated sheet 1 along the second direction Z; the second driving member drives the cutting member 6 to approach the first extension end 131 along the second direction Z, the cutting member 6 cuts the first extension end 131 along the edge of the positive electrode sheet 11, and the diaphragm 13 waste on the first suction accessory 41 is taken away.

[0092] As shown in Figure 2 and Figure 9 , the first driving member 42 drives the first suction accessory 41 to move away from the stack 1 along the second direction Z, the second driving member drives the cutting member 6 to move away from the stack 1 along the second direction Z, the third driving member 7 drives the first pressing plate 8 to move away from the stack 1 along the second direction Z; the fourth driving member 9 drives the blanking clamp 3 to move close to and clamp the stack 1 along the first direction X;

[0093] As shown in Figure 2 and Figure 10 , the fourth driving member 9 drives the blanking clamp 3 to move away from the stack 2 along the first direction X, under the pulling of the blanking clamp 3, the material on the unwinding mechanism 01 continues to be unwound, and the second extending end 132 is formed on the side of the diaphragm 13 away from the stack 1;

[0094] The fifth driving member 1B drives the second pressing plate 1C to move close to and press the side of the second extending end 132 along the second direction Z; the first driving member 42 drives the first suction accessory 41 to move close to the second extending end 132 along the second direction Z, and the first suction accessory 41 adsorbs and fixes the other side of the second extending end 132; the seventh driving member 1D3 drives the second suction accessory 1D1 to move close to the second extending end 132 along the second direction Z, and the second suction accessory 1D1 adsorbs and fixes the second extending end 132;

[0095] The second driving member drives the cutting member 6 to move close to the second extending end 132 along the second direction Z, and the cutting member 6 cuts the second extending end 132;

[0096] The fifth driving member 1B drives the second pressing plate 1C to move away from the stack 2 along the second direction Z; the first driving member 42 drives the first suction accessory 41 to move away from the second extending end 132 along the second direction Z; the second driving member drives the cutting member 6 to move away from the second extending end 132 along the second direction Z; the unwinding mechanism is reversely rotated, and the excess diaphragm 13 on the stack 2 is retracted;

[0097] As shown in Figure 2 and Figure 10 , the fourth driving member 9 drives the blanking clamp 3 to move away from the stack 2 along the first direction X, and the sixth driving member 1D2 drives the second suction accessory 1D1 to move away from the stack 2 along the first direction X, and the second suction accessory 1D1 moves synchronously with the blanking clamp 3 along the first direction X;

[0098] The winding clamp jaw 021 clamps the stack 1, and the blanking clamp 3 cancels the clamping of the stack 1; the rotating motor 022 drives the winding clamp jaw 021 to rotate, realizing the winding of the stack 1, and at the same time, the sixth driving member 1D2 drives the second suction accessory 1D1 to move close to the winding clamp jaw 021 along the first direction X, and the second suction accessory 1D1 makes the diaphragm 13 keep tight during winding.

[0099] The lamination device provided by the application reduces the risk of wrinkles of the lamination 1, thereby improving the quality of the lamination 1 and the lithium battery.

[0100] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art based on the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stacking device, characterized in that, The stacking device includes: Stacking platform (2) is used to support stacked pieces (1); The unloading clamp (3) is used to clamp the stacked piece (1) on the stacking platform (2) and to move the stacked piece (1) to the next process. The stacking platform (2) is provided with a clearance groove (21) which can accommodate at least a portion of the unloading clamp (3). The stack (2) has an adsorption part (1E) on the surface that contacts the stack (1), and the adsorption part (1E) is used to adsorb the stack (1).

2. The stacking device according to claim 1, characterized in that, Along the first direction (X), the adsorption part (1E) is located on the side of the stack (2) close to the unloading clamp (3), and the first direction (X) is the distribution direction of the stack (2) and the unloading clamp (3); The stacking device includes a tray (5) along the first direction (X). The tray (5) is located on the side of the stacking platform (2) away from the unloading clamp (3). The tray (5) includes a supporting plane (51) for supporting the end of the stacked piece (1) away from the unloading clamp (3).

3. The stacking device according to claim 2, characterized in that, The stack (1) includes a diaphragm (13), the diaphragm (13) includes a first extension end (131), and in the first direction (X), the first extension end (131) is located on the side of the stack (1) close to the unloading clamp (3); The stacking device includes a first adsorption member (41) along the first direction (X). The first adsorption member (41) is located on the side of the stacking platform (2) close to the unloading clamp (3). When the stacked piece (1) is located on the stacking platform (2), the first adsorption member (41) is used to adsorb and fix the first extension end (131). The stacking device further includes a cutting component located between the stacking platform (2) and the first adsorption member (41) along the first direction (X), and the cutting component is used to cut off the first extension end (131); Along the second direction (Z), the cutting assembly is located on the side of the stack (1) facing the stack (2), the second direction (Z) is the thickness direction of the stack (1), and the second direction (Z) is perpendicular to the first direction (X).

4. The stacking apparatus according to claim 3, characterized in that, The stacking device further includes a third driving member (7) and a first pressure plate (8). The third driving member (7) is driven to connect with the first pressure plate (8). Along the second direction (Z), the first pressure plate (8) is located on the side of the stack (1) away from the stacking platform (2). In the second direction (Z), the third driving member (7) can drive the first pressure plate (8) to move toward the stack (1) and press down to fix the stack (1).

5. The stacking apparatus according to claim 3, characterized in that, The stacking device includes a fourth driving member (9), which is drivenly connected to the unloading clamp (3). The fourth driving member (9) can drive the unloading clamp (3) to move closer to or further away from the stacked pieces (1) along the first direction (X). The stacking device further includes a first lead screw (1A), one end of which is driven to be connected to the fourth driving member (9), and the other end of which is threaded to the unloading clamp (3). The fourth driving member (9) can drive the first lead screw (1A) to rotate around its own axis, and the first lead screw (1A) can drive the unloading clamp (3) to move along the first direction (X).

6. The stacking apparatus according to claim 5, characterized in that, The stack (1) includes a diaphragm (13). When the feed clamp (3) moves the stack (1) to the side of the first adsorption member (41) away from the stack (2), the diaphragm (13) includes a second extension end (132). In the first direction (X), the second extension end (132) is located on the side of the stack (1) away from the feed clamp (3). The first adsorption member (41) is used to adsorb and fix the second extension end (132). The stacking device further includes a cutting component located between the stacking platform (2) and the first adsorption member (41) along the first direction (X), and the cutting component is used to cut off the second extension end (132); The stacking device further includes a fifth driving member (1B) and a second pressure plate (1C). The fifth driving member (1B) is driven to connect with the second pressure plate (1C). Along the first direction (X), the second pressure plate (1C) is located between the stacking platform (2) and the cutting assembly. Along the second direction (Z), the second pressure plate (1C) is located on the side of the second extension end (132) away from the stacking platform (2). In the second direction (Z), the fifth driving member (1B) can drive the second pressure plate (1C) to move toward the second extension end (132) and press down to fix the second extension end (132).

7. The stacking apparatus according to claim 6, characterized in that, The stacking device further includes a second adsorption member (1D1). Along the first direction (X), the second adsorption member (1D1) is located between the first adsorption member (41) and the feeding clamp (3). The second adsorption member (1D1) is used to adsorb and fix the second extension end (132). The stacking device further includes a sixth driving member (1D2), which is driven to connect with the second adsorption member (1D1). The sixth driving member (1D2) can drive the second adsorption member (1D1) to move along the first direction (X) so that the second adsorption member (1D1) moves synchronously with the feeding clamp (3) in the first direction (X).

8. The stacking apparatus according to claim 5, characterized in that, The stack (1) includes a positive electrode (11), a negative electrode (12) and a separator (13) stacked along the second direction (Z); The feeding clamp (3) includes at least a first clamp (31) and a second clamp (32) distributed along the second direction (Z). The first clamp (31) is located on the side of the stack (1) facing the stack (2). The first clamp (31) is used to contact the positive electrode (11), the negative electrode (12) or the diaphragm (13).

9. The stacking apparatus according to claim 8, characterized in that, When the first gripper (31) is in contact with the diaphragm (13), the feed clamp (3) also includes a third adsorption member (33). Along the second direction (Z), the third adsorption member (33) is located on the side of the stack (1) facing the stack (2), and the third adsorption member (33) is used to adsorb and fix the diaphragm (13).

10. The stacking apparatus according to claim 9, characterized in that, The first gripper (31) includes a first mounting plate (34), and both the first gripper (31) and the third adsorption member (33) are mounted on the first mounting plate (34); The first gripper (31) has a V-shaped, L-shaped or Z-shaped structure.

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