Lamination device and lithium battery production equipment

Abstract

The present invention relates to a lamination device and lithium battery production equipment, wherein the lamination device includes a film pulling mechanism and a feeding mechanism. The film pulling mechanism includes a plurality of first adsorption plates and a plurality of second adsorption plates distributed on opposite sides of the diaphragm. The plurality of first adsorption plates and the plurality of second adsorption plates can respectively adsorb the surfaces on opposite sides of the diaphragm and move back to back, thereby bending the diaphragm into a curved structure with a plurality of V-shaped grooves. In this way, the feeding mechanism can simultaneously insert a plurality of pole pieces into the corresponding plurality of V-shaped grooves, and by bringing the plurality of first adsorption plates and the plurality of second adsorption plates closer together along the first direction, the plurality of pole pieces are clamped in the diaphragm and a lamination assembly is obtained, thereby greatly improving the lamination efficiency. Moreover, the first adsorption plate and the second adsorption plate are both located on the outside of the lamination assembly, so that the film pulling mechanism can be easily withdrawn after the lamination assembly is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical automation, and in particular to a lamination device and lithium battery production equipment. Background Art

[0002] The production and processing of products like lithium batteries often requires lamination. For example, lithium battery production begins by laminating the positive and negative electrode sheets with the separator to create a bare cell. This is followed by pressing and packaging to create a complete battery. Currently, lithium batteries mostly use a "Z"-shaped lamination method for bare cell production. During lamination, a robot or other transfer device places only one or two electrode sheets at a time onto the lamination table. This results in low lamination efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a stacking device and lithium battery production equipment that can improve stacking efficiency to address the above problems.

[0004] A lamination device, comprising:

[0005] A film pulling mechanism, comprising a plurality of first adsorption plates and a plurality of second adsorption plates, wherein the plurality of first adsorption plates are arranged on one side of the diaphragm, and the plurality of second adsorption plates are arranged on the other side of the diaphragm, and the plurality of first adsorption plates and the plurality of second adsorption plates are arranged along a first direction, and the plurality of first adsorption plates and the plurality of second adsorption plates can respectively adsorb surfaces on opposite sides of the diaphragm and move back to back, so as to bend the diaphragm into a curved structure having a plurality of V-shaped grooves, and the opening directions of two adjacent V-shaped grooves are opposite; and

[0006] A feeding mechanism, comprising a plurality of feeding structures, wherein the plurality of feeding structures can feed a plurality of pole pieces into the plurality of V-shaped grooves respectively;

[0007] The plurality of first adsorption plates and the plurality of second adsorption plates can be brought together along the first direction to clamp the plurality of pole pieces in the diaphragm and obtain a laminated assembly.

[0008] In one embodiment, the adsorption surfaces of the first adsorption plate and the second adsorption plate are each provided with a plurality of adsorption holes, and the adsorption holes can be connected to a negative pressure device to form a negative pressure on the adsorption surface.

[0009] In one embodiment, the first adsorption plate can be bent toward the adsorbed diaphragm and clamp the pole piece sent into the V-shaped groove; the second adsorption plate can be bent toward the adsorbed diaphragm and clamp the pole piece sent into the V-shaped groove.

[0010] In one embodiment, the first adsorption plate includes two first sub-plates and a first rotating shaft connecting the two first sub-plates, and the two first sub-plates can rotate around the first rotating shaft to be parallel to each other or to form an angle; the second adsorption plate includes two second sub-plates and a second rotating shaft connecting the two second sub-plates, and the two second sub-plates can rotate around the second rotating shaft to be parallel to each other or to form an angle.

[0011] In one embodiment, the plurality of first adsorption plates and the plurality of second adsorption plates are transmission-connected to the same driving structure and can move in opposite directions under the drive of the driving structure, so that the diaphragm is bent into the curved structure.

[0012] In one embodiment, each of the film feeding structures includes a robot arm and a suction cup capable of sucking the electrode piece, and the robot arm can drive the suction cup to feed the sucked electrode piece into the V-shaped groove.

[0013] In one embodiment, the pole piece adsorbed on the suction cup extends out of the front end of the suction cup, and the edge of the front end of the suction cup forms a rounded corner.

[0014] In one embodiment, a feeding mechanism is further included, which includes an unwinding structure, a correction structure and a tension control structure. The diaphragm is unwound by the unwinding structure and passes through the first adsorption plates and the second adsorption plates after passing through the correction structure and the tension control structure in sequence.

[0015] In one embodiment, a pressing mechanism is further included, and the pressing mechanism can press the laminate assembly to press the pole piece and the diaphragm tightly.

[0016] A lithium battery production device comprises a lamination device as described in any one of the preferred embodiments above, wherein the pole pieces comprise a positive pole piece and a negative pole piece, and the pole pieces in two adjacent V-shaped grooves have opposite polarities.

[0017] In the aforementioned lamination device and lithium battery production equipment, the multiple first adsorption plates and the multiple second adsorption plates can respectively adsorb the surfaces on opposite sides of the diaphragm and move in opposite directions, thereby bending the diaphragm into a curved structure with multiple V-shaped grooves. In this way, the loading mechanism can simultaneously insert multiple electrode sheets into the corresponding multiple V-shaped grooves. By moving the multiple first adsorption plates and the multiple second adsorption plates closer together along a first direction, the multiple electrode sheets are clamped within the diaphragm to form a lamination assembly, thereby greatly improving lamination efficiency. Furthermore, the first and second adsorption plates are both located outside the lamination assembly, facilitating the removal of the film pulling mechanism after the lamination assembly is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 Schematic diagram of the lamination device in a first working state in a preferred embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the lamination device shown in the second working state;

[0021] Figure 3 for Figure 1 A schematic diagram of the lamination device shown in the third working state;

[0022] Figure 4 for Figure 1 A schematic diagram of a lamination assembly produced by the lamination device shown;

[0023] Figure 5 A schematic diagram of a lamination device in another embodiment of the present invention;

[0024] Figure 6 for Figure 5 Schematic diagram of the lamination assembly produced by the lamination device shown. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] See also Figures 1 to 3 The lamination device 10 in the preferred embodiment of the present invention includes a feeding mechanism 100, a film pulling mechanism and a loading mechanism.

[0032] The feeding mechanism 100 includes an unwinding mechanism, a deflection correction mechanism, and a tension control mechanism. The diaphragm 20 is unwound by the unwinding mechanism and then passes through the deflection correction mechanism and the tension control mechanism. The diaphragm 20 is stored in the unwinding mechanism as a roll. The deflection correction mechanism corrects the deflection of the unwound diaphragm 20, while the tension control mechanism ensures that the diaphragm 20 is always taut at a preset tension.

[0033] It should be noted that, in other embodiments, the feeding mechanism 100 can be omitted, and the diaphragm 20 can be directly provided by the output end of other equipment.

[0034] The film pulling mechanism is located downstream of the feeding mechanism 100 and can absorb and pull the diaphragm 20 unwound by the feeding mechanism 100, thereby bending the diaphragm 20. The film pulling mechanism includes a plurality of first adsorption plates 210 and a plurality of second adsorption plates 220, which are respectively located on both sides of the diaphragm 20 provided by the feeding mechanism 100. Figure 1 As shown, in this embodiment, the first adsorption plate 210 is located on the left side of the diaphragm 20, and the second adsorption plate 220 is located on the right side of the diaphragm 20. The first adsorption plate 210 can have the same structure as the second adsorption plate 220, and both have an adsorption surface capable of adsorbing the surface of the diaphragm 20.

[0035] The first adsorption plate 210 and the second adsorption plate 220 can be formed of ceramic, plastic, glass, etc. To avoid damaging the diaphragm 20, a flexible cushion layer formed of elastic material such as rubber, silicone, foam, etc. can be further provided on the adsorption surface of the first adsorption plate 210 and the second adsorption plate 220.

[0036] Specifically in this embodiment, the adsorption surfaces of the first adsorption plate 210 and the second adsorption plate 220 are each provided with a plurality of adsorption holes, which can be connected to a negative pressure device to form a negative pressure on the adsorption surface. In this way, the first adsorption plate 210 and the second adsorption plate 220 can adsorb the diaphragm 20 through negative pressure. By controlling the vacuum level, the adsorption force of the adsorption surface can be more accurately controlled. Obviously, in other embodiments, the first adsorption plate 210 and the second adsorption plate 220 can also adsorb the diaphragm 20 through electrostatic adsorption.

[0037] The plurality of first adsorption plates 210 and the plurality of second adsorption plates 220 are arranged along the first direction. The first direction refers to the extension direction of the diaphragm 20, that is, Figure 1 Furthermore, the first adsorption plates 210 and the second adsorption plates 220 are arranged alternately. In the first direction, one first adsorption plate 210 is inserted between two adjacent second adsorption plates 220, and one second adsorption plate 220 is inserted between two adjacent first adsorption plates 210.

[0038] Furthermore, the first adsorption plates 210 and the second adsorption plates 220 can respectively adsorb the surfaces on opposite sides of the diaphragm 20 and move back to back to bend the diaphragm 20 into a curved structure with multiple V-shaped grooves, and the opening directions of two adjacent V-shaped grooves are opposite.

[0039] like Figure 1 As shown, the first adsorption plates 210 can be attracted to the surface on the left side of the diaphragm 20 and move to the left, while the second adsorption plates 220 can be attracted to the surface on the right side of the diaphragm 20 and move to the right. In this way, the first adsorption plates 210 and the second adsorption plates 220 cooperate to form multiple V-shaped grooves in the diaphragm 20 at one time, thus achieving Z-shaped folding of the diaphragm 20.

[0040] Specifically, in this embodiment, the plurality of first adsorption plates 210 and the plurality of second adsorption plates 220 are connected to a common drive structure and are capable of moving in opposite directions under the drive structure to bend the diaphragm 20 into a curved configuration. This allows for greater synchronization between the plurality of first adsorption plates 210 and the plurality of second adsorption plates 220 when bending the diaphragm 20.

[0041] Obviously, in other embodiments, the driving methods for the first adsorption plate 210 and the second adsorption plate 220 may also be different. For example, each first adsorption plate 210 and each second adsorption plate 220 may be driven by a separate driving mechanism; or, multiple first adsorption plates 210 may be driven by one driving mechanism, while multiple second adsorption plates 220 may be driven by another driving mechanism.

[0042] The feeding mechanism includes multiple feeding structures, which can feed multiple pole pieces 30 into multiple V-shaped grooves. The multiple feeding structures can also be arranged into two groups, and are respectively located on opposite sides of the diaphragm 20. Figure 1 For example, one set of feeding structures can feed the pole piece into the V-shaped groove with an opening to the left, while the other set of feeding structures can feed the pole piece into the V-shaped groove with an opening to the right.

[0043] The lamination device 10 can be used in the preparation of lithium batteries. In this case, the electrode sheets 30 are divided into two types: positive electrode sheets and negative electrode sheets. Two sets of feeding structures located on opposite sides of the separator 20 can respectively perform the feeding operation of the positive electrode sheets and the negative electrode sheets.

[0044] The feeding mechanism can feed part of the electrode sheets 30 at a time and can feed multiple times. It can feed positive and negative electrode sheets simultaneously, or it can feed positive and negative electrode sheets separately. Specifically, in this embodiment, multiple electrode feeding mechanisms can operate synchronously. In other words, multiple electrode feeding mechanisms can feed multiple electrode sheets 30 into multiple V-shaped grooves simultaneously, and the feeding mechanism can load all electrode sheets 30 at once, thereby further improving efficiency.

[0045] The feeding structure can be driven by a guide rail or a robotic arm, or the pole piece 30 can be picked up by adsorption or clamping. In this embodiment, each feeding structure includes a robot (not shown) and a suction cup 310 capable of sucking the pole piece 30. The robot can drive the suction cup 310 to deliver the sucked pole piece 30 into the V-shaped groove. The robot has more degrees of freedom, which makes it convenient for the suction cup 310 to obtain the pole piece 30 and deliver the pole piece 30 into the corresponding V-shaped groove. Moreover, the suction cup 310 picks up the pole piece 30 by adsorption, and the contact area with the pole piece 30 is large, which can effectively avoid damaging the pole piece 30.

[0046] The loading mechanism generally includes a pole piece placement structure and a pole piece positioning mechanism. The pole piece placement structure can place the pole piece 30 in a specified position, while the pole piece positioning mechanism adjusts the orientation of the pole piece 30. After adjustment, the pole piece 30 is sucked by the suction cup 310, allowing the pole piece 30 to enter the corresponding V-shaped groove at a preset angle.

[0047] Furthermore, in this embodiment, the electrode piece 30 attached to the suction cup 310 extends beyond the front end of the suction cup 310, and the edge of the front end of the suction cup 310 is rounded. The front end of the suction cup 310 refers to the end of the suction cup 310 closer to the bottom of the V-shaped groove. For example, if the feeding structure on the left side of the diaphragm feeds the electrode piece 30 into the V-shaped groove from left to right, the front end of the suction cup 310 in the feeding structure refers to the right end. Conversely, the front end of the suction cup 310 refers to the left end.

[0048] Since the electrode piece 30 extends beyond the front end of the suction cup 310, it is partially suspended, making it easier to transfer the electrode piece 30 from the suction cup 310 to the V-shaped groove. The rounded edge of the front end of the suction cup 310 effectively prevents the edge of the suction cup 310 from damaging the surface of the electrode piece 30 or the diaphragm 20.

[0049] The multiple first adsorption plates 210 and the multiple second adsorption plates 220 can be brought together in a first direction to clamp the multiple electrode pieces 30 within the diaphragm 20 and form a laminated assembly. The multiple first adsorption plates 210 and the multiple second adsorption plates 220 are brought together to bring the two inner walls of each V-shaped groove closer together, ultimately clamping the electrode piece 30 between the two inner walls of the corresponding V-shaped groove. At this point, the multiple electrode pieces 30 are stacked on top of each other, with the diaphragm 20 sandwiched between adjacent electrode pieces 30, thereby forming a laminated assembly.

[0050] In this embodiment, there are two first adsorption plates 210 and two second adsorption plates 220. When the film pulling mechanism is started, the first adsorption plate 210 cooperates with the second adsorption plate 220 to bend the diaphragm 20 into four V-shaped grooves at one time. After inserting the electrode 30 into each V-groove and pressing them together, the following can be obtained: Figure 4When used in the preparation of lithium batteries, the electrode 30 includes two positive electrode sheets and two negative electrode sheets, and the laminated assembly is a bare battery cell.

[0051] Obviously, according to actual production needs, the number of the first adsorption plate 210 and the second adsorption plate 220 can be adjusted accordingly. Figure 5 and Figure 6 As shown, there are four first adsorption plates 210 and three second adsorption plates 220. When the film pulling mechanism is activated, five V-shaped grooves can be formed at one time, so the final battery cell will contain five pole pieces 30.

[0052] The loading mechanism can simultaneously insert multiple pole pieces 30 into corresponding multiple V-shaped grooves, thereby greatly improving the stacking efficiency. Moreover, the film-pulling structure applies a pulling force to the diaphragm 20 through the first adsorption plate 210 and the second adsorption plate 220. The contact area between its adsorption surface and the diaphragm 20 is large, which can prevent the diaphragm 20 from being torn. After the stacking is completed, the first adsorption plate 210 and the second adsorption plate 220 are both located on the outside of the battery cell. When exiting the film-pulling mechanism, the adsorption force of the adsorption surface of the first adsorption plate 210 and the second adsorption plate 220 can be eliminated by breaking the vacuum or other operations. Therefore, the interaction force between the battery cell and the first adsorption plate 210 and the second adsorption plate 220 is small, thereby avoiding damage to the battery cell when the film-pulling mechanism is exited.

[0053] Please refer again Figure 2 In this embodiment, the first adsorption plate 210 can be bent toward the adsorbed diaphragm 20 , and the second adsorption plate 220 can be bent toward the adsorbed diaphragm 20 .

[0054] In other words, both the first adsorption plate 210 and the second adsorption plate 220 can be bent toward their respective adsorption surfaces. As the first and second adsorption plates 210, 220 bend, the portion of the diaphragm 20 in contact with the adsorption surface can also be folded. This prevents excess diaphragm 20 from forming around the edges of the battery cell after molding.

[0055] The first adsorption plate 210 and the second adsorption plate 220 can both be provided with a shaft, hinge, or other structure in the middle thereof to enable the first adsorption plate 210 and the second adsorption plate 220 to bend. Specifically, in this embodiment, the first adsorption plate 210 includes two first sub-plates and a first shaft connecting the two first sub-plates. The two first sub-plates can rotate around the first shaft to be parallel to each other or at an angle. The second adsorption plate 220 includes two second sub-plates and a second shaft connecting the two second sub-plates. The two second sub-plates can rotate around the second shaft to be parallel to each other or at an angle.

[0056] When the diaphragm 20 is adsorbed, the two first sub-plates and the two second sub-plates are rotated to be parallel to each other, so that the adsorption surface can make good contact with the surface of the diaphragm 20. Moreover, the angle between the two first sub-plates and the angle between the two second sub-plates can be adjusted arbitrarily. When the diaphragm 20 is driven to bend, the two first sub-plates and the two second sub-plates can first be bent to the first angle; and when the feeding structure feeds the pole piece 30 into the V-shaped groove, the two first sub-plates and the two second sub-plates can be further bent to the second angle, thereby clamping the pole piece 30. The two first sub-plates can be connected to the driving member by transmission, and can rotate relative to each other under the drive of the driving member so that the first angle or the second angle is formed between the two. Similarly, the two second sub-plates can be connected to the driving member by transmission, and can achieve angle adjustment under the drive of the driving member.

[0057] After being fed into the V-shaped groove, the electrode 30 is clamped and positioned by the curved first and second adsorption plates 210, 220. Therefore, once the electrode 30 is clamped by the first or second adsorption plate 210, 220, the electrode feeding mechanism can be withdrawn from the V-shaped groove. This avoids the need to withdraw the electrode feeding mechanism after the battery cell is formed, effectively preventing damage to the battery cell stacking accuracy.

[0058] In addition, in this embodiment, the lamination device 10 further includes a pressing mechanism (not shown), which can press the battery cell to press the electrode 30 and the diaphragm 20 tightly. The battery cell is relatively loose after being formed, and the pressing mechanism can further press the battery cell to avoid the change of the relative position of the electrode 30 during the transfer to the next process. The pressing mechanism can be formed by two means that can be moved in the first direction, i.e. Figure 1 Two pressing plates are arranged opposite to each other in the upper and lower directions.

[0059] The following combination Figures 1 to 4 , briefly describe the working process of the lamination device 10:

[0060] The feeding mechanism 100 unwinds the diaphragm 20 and passes it between the multiple first adsorption plates 210 and the multiple second adsorption plates 220. The film pulling mechanism starts working, and the multiple first adsorption plates 210 and the multiple second adsorption plates 220 respectively adsorb the surfaces on opposite sides of the diaphragm 20 and move in opposite directions. At the same time, the first adsorption plate 210 and the multiple second adsorption plates 220 are bent to a first angle, thereby bending the diaphragm 20 into a serrated shape and forming multiple V-shaped grooves. The sheet feeding structure feeds the multiple electrode sheets 30 into the multiple V-shaped grooves respectively. The first adsorption plate 210 and the second adsorption plate 220 continue to bend to a second angle to clamp the electrode sheets 30 fed into each V-shaped groove respectively, and the sheet feeding structure withdraws. The film pulling mechanism brings the multiple first adsorption plates and the multiple second adsorption plates together along the first direction to form a battery cell. The film pulling mechanism withdraws, and the multiple first adsorption plates 210 and the multiple second adsorption plates 220 return to their initial positions. The pressing mechanism further presses the battery cell.

[0061] The present invention also provides a lithium battery production device. The lithium battery production device includes a stacking device 10. The electrodes include a positive electrode and a negative electrode, and the polarities of the electrodes 30 in two adjacent V-shaped grooves are opposite. The stacking device 10 stacks the electrodes to form a bare cell.

[0062] Furthermore, lithium battery production equipment generally also includes a hot pressing device, a rubber coating device, etc., which will perform operations such as hot pressing, rubber coating, and shelling on the prepared bare battery cells to finally produce lithium batteries.

[0063] In the aforementioned lamination device 10 and lithium battery production equipment, the multiple first adsorption plates 210 and the multiple second adsorption plates 220 are capable of respectively adsorbing the surfaces of opposite sides of the diaphragm 20 and moving in opposite directions, thereby bending the diaphragm 20 into a curved structure having multiple V-shaped grooves. This allows the loading mechanism to simultaneously insert the multiple electrode sheets 30 into the corresponding multiple V-shaped grooves. By moving the multiple first adsorption plates 210 and the multiple second adsorption plates 220 closer together along a first direction, the multiple electrode sheets 30 are clamped within the diaphragm 20 to form a laminated assembly, thereby significantly improving lamination efficiency. Furthermore, the first adsorption plates 210 and the second adsorption plates 220 are both located outside the laminated assembly, facilitating the removal of the film pulling mechanism after the laminated assembly is formed.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A lamination device, characterized in that: include: A film-pulling mechanism, comprising a plurality of first adsorption plates and a plurality of second adsorption plates, wherein the plurality of first adsorption plates are arranged on one side of the diaphragm, and the plurality of second adsorption plates are arranged on the other side of the diaphragm, and the plurality of first adsorption plates and the plurality of second adsorption plates are arranged along a first direction, and the plurality of first adsorption plates and the plurality of second adsorption plates are capable of respectively adsorbing surfaces on opposite sides of the diaphragm and moving in opposite directions to bend the diaphragm into a curved structure having a plurality of V-shaped grooves, and the opening directions of two adjacent V-shaped grooves are opposite; and The feeding mechanism includes a plurality of feeding structures, wherein the plurality of feeding structures can feed a plurality of electrode sheets into the plurality of V-shaped grooves respectively; the feeding mechanism also includes a electrode sheet positioning mechanism, wherein the electrode sheet positioning mechanism can adjust the orientation of the electrode sheet; Among them, multiple first adsorption plates and multiple second adsorption plates can be brought together along the first direction to clamp multiple pole pieces in the diaphragm and obtain a stacked assembly. The first adsorption plate can be bent toward the adsorbed diaphragm and clamp the pole piece sent into the V-shaped groove; the second adsorption plate can be bent toward the adsorbed diaphragm and clamp the pole piece sent into the V-shaped groove.

2. The lamination device according to claim 1, characterized in that The adsorption surfaces of the first adsorption plate and the second adsorption plate are both provided with a plurality of adsorption holes, and the adsorption holes can be connected to the negative pressure device to form negative pressure on the adsorption surface.

3. The lamination device according to claim 1, characterized in that The first adsorption plate includes two first sub-plates and a first rotating shaft connecting the two first sub-plates, and the two first sub-plates can rotate around the first rotating shaft to be parallel to each other or at an angle; the second adsorption plate includes two second sub-plates and a second rotating shaft connecting the two second sub-plates, and the two second sub-plates can rotate around the second rotating shaft to be parallel to each other or at an angle.

4. The lamination device according to claim 1, characterized in that The plurality of first adsorption plates and the plurality of second adsorption plates are transmission-connected to the same driving structure and can move in opposite directions under the drive of the driving structure, so that the diaphragm is bent into the curved structure.

5. The lamination device according to claim 1, characterized in that Each of the film feeding structures includes a robot and a suction cup capable of sucking the electrode piece. The robot can drive the suction cup to feed the sucked electrode piece into the V-shaped groove.

6. The lamination device according to claim 5, characterized in that: The pole piece adsorbed on the suction cup extends out of the front end of the suction cup, and the edge of the front end of the suction cup forms a rounded corner.

7. The lamination device according to claim 1, characterized in that It also includes a feeding mechanism, which includes a unwinding structure, a correcting structure and a tension control structure. The diaphragm is unwound by the unwinding structure and passes through multiple first adsorption plates and multiple second adsorption plates after passing through the correcting structure and the tension control structure in sequence.

8. The lamination device according to claim 1, characterized in that It also includes a pressing mechanism, which can press the laminate assembly to press the pole piece and the diaphragm tightly.

9. A lithium battery production equipment, characterized in that: It comprises a lamination device as described in any one of claims 1 to 8 above, wherein the pole pieces comprise a positive pole piece and a negative pole piece, and the pole pieces in two adjacent V-shaped grooves have opposite polarities.

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