Laminating device

Abstract

The present invention relates to a laminating device, which includes a laminating mechanism, a swing roller mechanism, a diaphragm positioning mechanism and a cutting mechanism. After the cell laminating is completed, the diaphragm positioning mechanism fixes the diaphragm between the output end of the swing roller mechanism and the laminating table on the first adsorption surface, and the cutting mechanism cuts off the diaphragm. The auxiliary pressing member can press the part of the cut diaphragm extending out of the first adsorption surface onto the support surface. When the first pressing member moves towards the laminating table in the first direction, the free section of the diaphragm can be clamped between the support surface and the side surface. Then, the swing roller mechanism and the laminating table move relative to each other in the first direction, and cooperate with the partition assembly to lay the first-layer diaphragm on the bearing surface. Since the diaphragm is adsorbed and fixed by the first adsorption surface before and after cutting, and the free section formed after the diaphragm is cut can be pulled to the laminating table under the drive of the first pressing member, there is no need for deviation correction after the first-layer diaphragm is laid. Therefore, the above laminating device can improve the laminating efficiency.

Description

Technical Field

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

[0002] In the production process of lithium battery cells, it is necessary to alternately stack positive electrode sheets and negative electrode sheets, and separate them with a separator between the positive electrode sheet and the negative electrode sheet. In the Z-type laminating process, the cut electrode sheets are sequentially placed on the laminating table, and each time an electrode sheet is placed, a layer of the separator is folded and covered, so that the separator forms a Z shape. The separator used in the Z-type laminating process is continuous. After a cell is stacked, the separator needs to be cut to discharge the cell. The cut separator first forms a free section that swings at one end, and the separator of the free section needs to be pulled back to the laminating table again and used as the first-layer separator of the next cell.

[0003] After the cell is discharged, generally, the above-mentioned free-section separator is blown to the bearing surface of the laminating table by an air-blowing method. The movement process of the separator caused by the air flow has a certain randomness, so the separator is prone to phenomena such as deviation, wrinkling and flanging. Therefore, after the air-blowing, operations such as correcting the deviation of the separator are required, and the deviation correction takes a long time, resulting in low laminating efficiency. Summary of the Invention

[0004] Based on this, it is necessary to provide a laminating device that can improve the laminating efficiency in view of the above problems.

[0005] A laminating device includes:

[0006] A laminating mechanism, including a laminating table, the laminating table having a bearing surface and a side surface;

[0007] A swing roller mechanism, including a partition component, the separator can wind around the swing roller mechanism and be output from the output end of the swing roller mechanism. The swing roller mechanism and the laminating table can reciprocate relative to each other in a first direction, so that the separator is laid in a Z shape on the bearing surface, and the partition component can clamp or release the separator;

[0008] A separator positioning mechanism, including a first pressing member and an auxiliary pressing member. The first pressing member is arranged on one side of the laminating table along the first direction and can move along the first direction. The first pressing member includes a first adsorption surface parallel to the bearing surface and a support surface facing the side surface; and

[0009] A cutting mechanism;

[0010] After the lamination is completed, the swing roller mechanism is located on the side of the first pressing member facing away from the lamination table, and the diaphragm positioning mechanism can fix the diaphragm between the output end of the swing roller mechanism and the lamination table to the first adsorption surface; the cutting mechanism can cut off the diaphragm between the first pressing member and the lamination table; after the diaphragm is cut off, the auxiliary pressing member can force the part of the diaphragm extending out of the first adsorption surface to bend towards the support surface, and the first pressing member moves towards the lamination table along the first direction until the support surface presses the diaphragm against the side surface.

[0011] In one embodiment, the diaphragm positioning mechanism further includes a second pressing member, and the second pressing member can move along a second direction perpendicular to the bearing surface and press the diaphragm between the output end of the swing roller mechanism and the lamination table onto the first adsorption surface.

[0012] In one embodiment, the auxiliary pressing member is installed on the second pressing member, and after the cutting mechanism cuts off the diaphragm between the first pressing member and the lamination table, the auxiliary pressing member can move relative to the second pressing member to force the part of the diaphragm extending out of the first adsorption surface to bend towards the support surface.

[0013] In one embodiment, vacuum adsorption holes are provided on both the support surface and the first adsorption surface to adsorb the diaphragm.

[0014] In one embodiment, air blowing holes are formed on the surface of the second pressing member facing the lamination table and / or the first pressing member.

[0015] In one embodiment, the second pressing member is installed on the swing roller mechanism, and after the lamination is completed, the second pressing member can move above the first pressing member along with the swing roller mechanism.

[0016] In one embodiment, the second pressing member is installed on the cutting mechanism, and when the cutting mechanism enters the cutting station where it can cut off the diaphragm between the first pressing member and the lamination table, the second pressing member can move above the first pressing member along with the cutting mechanism.

[0017] In one embodiment, the cutting mechanism includes a cutting knife, a cutting driving member, a support and an elastic member. The cutting knife and the second pressing member are both mounted on the support. The elastic member is disposed between the second pressing member and the support. The cutting driving member can drive the support to move along the second direction. During the process of the support moving along the second direction towards the first pressing member, the second pressing member can contact the diaphragm first and press the diaphragm against the first pressing member. As the support continues to move, the elastic member can be compressed and deformed to make the cutting knife move relative to the second pressing member along the second direction until the diaphragm is cut off.

[0018] In one embodiment, the laminating mechanism includes a support main body and a first lifting assembly. The first lifting assembly, the laminating table and the first pressing member are all mounted on the support main body, and the laminating table can move along a second direction perpendicular to the bearing surface under the drive of the first lifting assembly.

[0019] In one embodiment, the laminating mechanism further includes a second lifting assembly. The support main body is disposed on the moving end of the second lifting assembly and can move along the second direction under the drive of the second lifting assembly.

[0020] In one embodiment, negative pressure holes are formed in the bearing surface, and the bearing surface can vacuum adsorb the diaphragm laid on the bearing surface through the negative pressure holes.

[0021] In one embodiment, the cutting mechanism includes a cutting knife, and an insulating protective layer is provided on one side of the cutting knife. When the cutting mechanism enters the cutting station where the diaphragm between the first pressing member and the laminating table can be cut off, the insulating protective layer is located on the side of the cutting knife facing the laminating table.

[0022] In one embodiment, a lower wire clamping jaw fixedly connected to the cutting mechanism is further included. The lower wire clamping jaw is used for clamping the battery cell located on the bearing surface;

[0023] Wherein, the lower wire clamping jaw can move along with the cutting mechanism to drive the clamped battery cell away from the bearing surface.

[0024] After the stacking of the battery cells is completed in the above-mentioned stacking device, the diaphragm positioning mechanism fixes the diaphragm between the output end of the swing roller mechanism and the stacking table to the first adsorption surface. The cutting-off assembly clamps the diaphragm, and the cutting mechanism cuts off the diaphragm between the first pressing member and the stacking table. The cut diaphragm is adsorbed by the first adsorption surface, and the auxiliary pressing member can press the part of the diaphragm extending out of the first adsorption surface onto the supporting surface. The first pressing member moves towards the stacking table in the first direction, and then the free section of the diaphragm can be clamped between the supporting surface and the side surface. Then, the swing roller mechanism and the stacking table move relative to each other in the first direction, and cooperate with the cutting-off assembly to clamp or release the diaphragm, so that the first-layer diaphragm can be laid on the bearing surface. Since the diaphragm can be adsorbed and fixed by the first adsorption surface before and after cutting, and the free section formed after the diaphragm is cut can be pulled to the stacking table under the drive of the first pressing member, there is no need to correct the deviation after the first-layer diaphragm is laid. Therefore, the above-mentioned stacking device can improve the stacking efficiency. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 The front view of the stacking device in an embodiment of the present invention;

[0027] Figure 2 is Figure 1 The front view of the stacking mechanism in the shown stacking device;

[0028] Figure 3 is Figure 2 The left view of the shown stacking mechanism;

[0029] Figure 4 is Figure 2 The top view of the shown stacking mechanism;

[0030] Figure 5 is Figure 1 The enlarged schematic view of the part where the diaphragm positioning mechanism is located in the shown stacking device;

[0031] Figure 6 is Figure 5 The enlarged schematic view of the diaphragm positioning mechanism in another working state;

[0032] Figure 7 The structural schematic view of the cutting mechanism in another embodiment of the present invention;

[0033] Figures 8 to 20 is Figure 1Simplified schematic diagram of the state change of the lamination device during the lamination process;

[0034] Figures 21 to 25 It is a simplified schematic diagram of the state change of the lamination device during the lamination process in another embodiment. Specific embodiments

[0035] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 construed as a limitation of the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0041] Please refer to Figure 1 , the lamination device 10 in an embodiment of the present invention includes a lamination mechanism 100, a swing roller mechanism 200, a diaphragm positioning mechanism 300 and a cutting mechanism 400.

[0042] The lamination mechanism 100 can stack the electrode sheets and the diaphragm to obtain an electric core. Specifically, the electrode sheets include a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet and the negative electrode sheet can be alternately stacked on the lamination mechanism 100, and the diaphragm is disposed between adjacent positive electrode sheets and negative electrode sheets to separate the adjacent positive electrode sheets and negative electrode sheets.

[0043] In addition, in order to smoothly obtain the electrode sheets required for lamination and unload the stacked electric core from the lamination mechanism 100, the lamination device 10 in this embodiment further includes a sheet taking mechanism (not shown in the figure) and a downline jaw 500.

[0044] Please refer to together Figure 2 and Figure 3 , the lamination mechanism 100 includes a lamination table 110. The lamination table 110 can be a plate-like structure formed by a material with high mechanical strength such as metal, and is generally rectangular. The lamination table 110 has a bearing surface 111 and side surfaces 112, and the side surfaces 112 are distributed on the sides of the lamination table 110. Specifically, when in use, the bearing surface 111 of the lamination table 110 faces upward and is used to carry the electrode sheets and the diaphragm, and the sheet taking mechanism can obtain the electrode sheets and sequentially place the electrode sheets on the bearing surface 111. There is generally a 90-degree angle between the bearing surface 111 and the side surfaces 112, so when the bearing surface 111 faces upward, the side surfaces 112 face left or right.

[0045] Please refer to togetherFigure 4 In this embodiment, negative pressure holes 101 are formed on the bearing surface 111, and the bearing surface 111 can adsorb the diaphragm laid on the bearing surface 111 by means of the negative pressure holes 101.

[0046] Specifically, the negative pressure holes 101 can be evenly distributed on the bearing surface 111 or only distributed at specific positions of the bearing surface 111, such as one side edge. The negative pressure holes 101 can be connected through a pipeline vacuum generating device, so that a negative pressure can be formed on the contact surface between the bearing surface 111 and the diaphragm. When stacking, it is necessary to first lay a layer of diaphragm on the bearing surface 111, that is, the first layer of diaphragm. The negative pressure holes 101 can reliably adsorb the first layer of diaphragm on the bearing surface 111, thereby preventing the first layer of diaphragm from shifting during the stacking process, which helps to improve the quality of the battery cell.

[0047] In this embodiment, the stacking mechanism 100 further includes a support body 120 and a first lifting assembly 130. The stacking table 110 is installed on the support body 120, and the stacking table 110 can move in a second direction perpendicular to the bearing surface 111 under the drive of the first lifting assembly 130. Specifically, the second direction refers to Figure 1 the up and down direction shown. The first lifting assembly 130 can be a cylinder, an electric cylinder, or a motor and a matching screw thread lead screw pair, etc. It can be seen that the first lifting assembly 130 can adjust the height of the stacking table 110 as needed during the stacking process, so as to ensure the smooth progress of the stacking process.

[0048] Furthermore, in this embodiment, the stacking mechanism 100 further includes a second lifting assembly 140. The support body 120 is arranged on the moving end of the second lifting assembly 140 and can move in the second direction under the drive of the second lifting assembly 140. The second lifting assembly 140 can have the same structure as the first lifting assembly 130. The second lifting assembly 140 can integrally adjust the height of the stacking mechanism 100, so that the stacking mechanism 100 can be applied to more application scenarios.

[0049] In addition, in this embodiment, the stacking mechanism 100 further includes a pressing assembly 150. The pressing assembly 150 includes a pressing state and an avoidance state. When the pressing assembly 150 is in the pressing state, it can press the pole piece and the diaphragm against the bearing surface 111, thereby preventing the stacked pole pieces and the diaphragm 11 from loosening or shifting; when the pressing assembly 150 is in the avoidance state, it can form an avoidance for the bearing surface 111, so as to facilitate the pole piece and the diaphragm to be successfully stacked on the bearing surface 111.

[0050] Specifically, the pressing assembly 150 includes a pressing blade 151 disposed at the edge of the stacking table 110 and a pressing driving member 152. The pressing driving member 152 can drive the pressing blade 151 to move in a direction parallel to the bearing surface and a direction perpendicular to the bearing surface, so that the pressing assembly 150 can switch between a pressing state and an avoidance state. The pressing driving member 152 can be an electric cylinder or a pneumatic cylinder. For a rectangular stacking table 110, the pressing blades 151 are preferably distributed at the four top corners of the stacking table 110.

[0051] Please refer to again Figure 1 , during actual use, the swing roller mechanism 200 is located above the stacking table 110, and the continuously unrolled diaphragm 11 can wind around the swing roller mechanism 200 and be output from the output end of the swing roller mechanism 200. Specifically, a main driving swing roller 220 is provided at the output end of the swing roller mechanism 200, and the diaphragm 11 output from the swing roller mechanism 200 can pass through the main driving swing roller 220, and the main driving swing roller 220 can drive the diaphragm 11 to swing in a first direction. The first direction is perpendicular to the second direction, specifically referring to Figure 1 the left-right direction shown in the figure.

[0052] The wound diaphragm 11 can be pre-wound around the tensioning shaft and continuously unrolled from the tensioning shaft to the swing roller mechanism 200 during the stacking process. In addition, the diaphragm 11 can also be output from the previous process and directly enter the swing roller mechanism 200. The diaphragm 11 output from the swing roller mechanism 200 can be laid on the bearing surface 111, so as to separate two adjacent pole pieces placed on the bearing surface 111 by the picking mechanism. Specifically, the swing roller mechanism 200 and the stacking table 110 can reciprocate relative to each other in the first direction, and cooperate with the picking mechanism to sequentially place the pole pieces on the surface of the diaphragm 11, so that the diaphragm 11 output from the swing roller mechanism 200 is laid in a Z shape on the bearing surface 111 and the stacking of the battery cells is completed.

[0053] Furthermore, the swing roller mechanism 200 includes a partition assembly 210, and the partition assembly 210 can clamp or release the diaphragm. The partition assembly 210 is generally disposed upstream of the output end of the swing roller mechanism 200. During the stacking process, the partition assembly 210 releases the diaphragm; after the stacking is completed, the partition assembly 210 can be switched between a state of clamping the diaphragm and a state of releasing the diaphragm according to the actual working conditions. Specifically, in this embodiment, the partition assembly 210 includes a rotating roller 211, a partition driving member 212, and a pressing member 213 disposed at the driving end of the partition driving member 212. The diaphragm 11 can pass through between the pressing member 213 and the rotating roller 211, and the partition driving member 212 can drive the pressing member 213 to approach or move away from the rotating roller 211, so as to clamp or release the diaphragm 11.

[0054] Specifically, in this embodiment, the stacking table 110 remains stationary, and the swinging roller mechanism 200 reciprocates along the first direction. Obviously, in other embodiments, it can also be that the swinging roller mechanism 200 remains stationary while the stacking table 110 reciprocates along the first direction.

[0055] Before stacking, the swinging roller mechanism 200 first lays the first layer of separator on the bearing surface 111, that is, the first-layer separator, and stays on one side of the stacking table 110 in the first direction ( Figure 1 the left side shown in the figure). This position can be defined as the stacking starting station. During the stacking process, the partition assembly 210 releases the separator 11, and the sheet picking mechanism alternately places the positive electrode sheet and the negative electrode sheet on the stacking table 110. And for each placement of a pole piece, the swinging roller mechanism 200 acts once along the first direction and pulls the separator 11 to cover the pole piece, so that there is a pole piece between adjacent separators 11; repeat the above operation until the stacked pole pieces reach the required number of layers, then the preparation of a battery cell can be completed, and the separator 11 laid on the stacking table 110 is folded into a "Z" shape.

[0056] After stacking is completed, the swinging roller mechanism 200 stays on the side of the stacking table 110 in the first direction that is opposite to the above-mentioned stacking starting station. Specifically, in this embodiment, it is Figure 1 the right side shown in the figure. At this time, the position of the swinging roller mechanism 200 can be defined as the stacking end station.

[0057] The separator positioning mechanism 300 includes a first pressing member 310 and an auxiliary pressing member 330. Among them, the first pressing member 310 is arranged on one side of the stacking table 110 along the first direction and can move along the first direction. Specifically, the first pressing member 310 can be installed on the support body 120 through a structure of a guide rail and a slider. The first pressing member 310 is located on the side of the stacking table 110 facing the above-mentioned stacking end station, that is, Figure 1 the right side shown in the figure. Moreover, the first pressing member 310 is located between the stacking table 110 and the above-mentioned stacking end station. The first pressing member 310 can be a strip-shaped plate structure, and its extending direction is the same as the extending direction of the side surface 112 of the stacking table 110. The auxiliary pressing member 330 can also be a plate structure.

[0058] Please refer to Figure 2 again. The first pressing member 310 includes a first adsorption surface 311 and a support surface 312. Moreover, the first adsorption surface 311 is parallel to the bearing surface 111, and the support surface 312 faces the side surface 112. The first adsorption surface 311 can adsorb the separator 11. Specifically, the surface of the first adsorption surface 311 is provided with vacuum adsorption holes (not shown in the figure), and the vacuum adsorption holes can be connected to a vacuum generating device through a pipeline, so as to form a negative pressure on the first adsorption surface 311.

[0059] Take Figure 2Taking the shown example, the first adsorption surface 311 is the upper surface of the first pressing member 310, and the supporting surface 312 is the left side surface of the first pressing member 310. It should be noted that the first adsorption surface 311 being parallel to the bearing surface 111 means that the orientations of the first adsorption surface 311 and the bearing surface 111 are basically the same, and they may not be in a strictly parallel state. Since the angle between the bearing surface 111 and the side surface 112 is approximately 90 degrees, the angle between the first adsorption surface 311 and the supporting surface 312 is also approximately 90 degrees.

[0060] After the lamination is completed, the swing roller mechanism 200 stays at the lamination end station. At this time, the swing roller mechanism 200 is located on the side of the first pressing member 310 facing away from the lamination table 110. That is to say, the first pressing member 310 is located between the swing roller mechanism 200 and the lamination table 110. Therefore, the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 will pass through the first pressing member 310, and the first adsorption surface 311 faces the passing diaphragm 11.

[0061] Next, the diaphragm positioning mechanism 300 fixes the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 to the first adsorption surface 311. During the lamination process, the cutting mechanism 400 is located outside the cutting station, so it can avoid interfering with the lamination process. After the lamination is completed, the cutting mechanism 400 enters the cutting station to prepare to cut the diaphragm 11 between the first pressing member 310 and the lamination table 110. Specifically, the cutting station is between the lamination table 111 and the first pressing member 310. Among them, the cutting mechanism 400 includes a cutting knife 410. After the cutting mechanism 400 enters the cutting station, the diaphragm 11 fixed between the first pressing member 310 and the lamination table 110 can be cut by driving the cutting knife 410 to move up and down.

[0062] Specifically in this embodiment, the cutting knife 410 is a hot cutting knife. When the cutting knife 410 is energized and heated, the diaphragm 11 in contact with it can be cut. Moreover, an insulating protective layer 450 is provided on one side of the cutting knife 410, and when the cutting mechanism 400 enters the cutting station, the insulating protective layer 450 is located on the side of the cutting knife 410 facing the lamination table 110, that is Figure 1 the left side shown. The insulating protective layer 450 can be made of epoxy resin material and can play a role in buffering and insulation. The insulating protective layer 450 can prevent the cutting knife 410 from colliding with the lamination table 110 during cutting or debugging, prevent the phenomenon of metal touching metal in the energized state, improve safety, and can protect the cutting knife 410 and the lamination table 110.

[0063] Please refer to again Figure 1, in this embodiment, the offline gripper 500 of the laminating device is fixedly connected to the cutting mechanism 400. The offline gripper 500 is used to grip the battery cell located on the bearing surface 111. Moreover, the offline gripper 500 can move with the cutting mechanism 400 to drive the gripped battery cell away from the bearing surface 111.

[0064] Specifically, when the cutting mechanism 400 enters the cutting station, the offline gripper 500 can move with the cutting mechanism 400 to near the laminating table 110 and grip the battery cell located on the bearing surface 111. And when the cutting mechanism 400 exits the cutting station, the offline gripper 500 can drive the gripped battery cell away from the bearing surface 111 until the gripped battery cell is moved to the discharging position.

[0065] It can be seen that the offline gripper 500 is linked with the cutting mechanism 400 and can complete the gripping of the battery cell on the bearing surface 111 by using the time when the cutting mechanism 400 cuts the separator 11. When the cutting mechanism 400 finishes cutting and exits the cutting station, the battery cell is separated from the separator 11, and the offline gripper 500 can drive the battery cell away from the laminating table 110 with the cutting mechanism 400. Therefore, the offline operation process for the battery cell can be simplified, which helps to improve the production efficiency.

[0066] It can be understood that in other embodiments, the offline gripper 500 and the cutting mechanism 400 can also be separately driven and move independently by different driving parts.

[0067] After the cutting mechanism 400 cuts the separator 11 between the first pressing member 310 and the laminating table 110, the stacked battery cells are disconnected from the separator 11, and the separator 11 will form a free section. The free section formed by cutting the separator 11 will extend out of the side of the first adsorption surface 311 facing the laminating table 110, that is Figure 1 the left side shown. Since the separator positioning mechanism 300 fixes the separator 11 before the cutting mechanism 400 performs the cutting operation, it can avoid the free section formed after cutting the separator 11 from being electrostatically adsorbed to the output end of the swing roller mechanism 200. Moreover, after the separator 11 is cut, it can continue to be adsorbed and fixed by the first adsorption surface 311, so as to prevent the free section of the separator 11 from moving randomly.

[0068] Furthermore, the auxiliary pressing member 330 can force the portion of the diaphragm 11 extending beyond the first adsorption surface 311 to bend towards the support surface 312. Specifically, the portion of the diaphragm 11 extending beyond the first adsorption surface 311 is the free segment formed after cutting. In the initial state, the auxiliary pressing member 330 is away from the first pressing member 310. After the diaphragm 11 is cut, the auxiliary pressing member 330 can be abutted against the free segment of the diaphragm 11 through flipping or translation, and the free segment is bent during the continuous flipping or translation. Generally, the auxiliary pressing member 330 can force the free segment of the diaphragm 11 to bend by 90 degrees, so that the diaphragm 11 fits against the support surface 312. At this time, the free segment of the diaphragm 11 will be located between the support surface 312 and the side surface 112.

[0069] Specifically in this embodiment, vacuum adsorption holes are provided on the support surface 312 to adsorb the diaphragm. Similarly, the vacuum adsorption holes on the support surface 31 can be connected to a vacuum generating device through a pipeline, so as to be able to form a negative pressure on the support surface 312. Therefore, when the auxiliary pressing member 330 abuts the free segment of the diaphragm 11 against the support surface 312, the support surface 312 can achieve more stable positioning of the free segment.

[0070] Before laminating the next battery cell, the auxiliary pressing member 330 is reset, thus exposing the support surface 312. The first pressing member 310 first moves along the first direction towards the lamination table 110 until it abuts against the lamination table 110, so that the free segment of the diaphragm 11 is clamped between the support surface 312 and the side surface 112. In this way, the free segment of the diaphragm 11 can be positioned on the lamination table 110. After the free segment of the diaphragm 11 is fixed, the swing roller mechanism 200 moves along the first direction relative to the lamination table 110, and cooperates with the partition assembly 210 to clamp or release the diaphragm, so that the first layer of diaphragm can be laid on the bearing surface 111. At this time, the swing roller mechanism 200 returns to the above-mentioned lamination starting position, so cooperating with the sheet taking mechanism, the lamination of the next battery cell can be carried out.

[0071] Since the diaphragm 11 can be adsorbed and fixed by the first adsorption surface 311 both before and after being cut by the cutting mechanism 400, and the free segment of the diaphragm 11 can be pulled to the lamination table 110 under the drive of the first pressing member 310, thus avoiding the random movement of the free segment of the diaphragm 11 during the process of being pulled to the lamination table 110, no rectification is required after the first layer of diaphragm is laid. Therefore, the time interval required for the lamination operation of two battery cells can be significantly shortened, thereby improving the lamination efficiency.

[0072] Please refer to Figure 1 again. In this embodiment, the diaphragm positioning mechanism 300 further includes a second pressing member 320. The second pressing member 320 can move along the second direction and press the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 against the first adsorption surface 311.

[0073] The second pressing member 320 may have the same structure as the first pressing member 310, both being strip-shaped plate structures. After lamination is completed, the second pressing member 320 can cooperate with the first pressing member 310 to clamp the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110, enabling more reliable fixation of the diaphragm 11. Moreover, when the second pressing member 320 and the first pressing member 310 cooperate to clamp the diaphragm 11, the vacuum suction holes can be temporarily not evacuated, thus saving the gas source.

[0074] After the cutting mechanism 400 cuts the diaphragm 11 and the auxiliary pressing member 330 presses the free section of the diaphragm 11 against the support surface 312, the second pressing member 320 still needs to move away from the first pressing member 310, thereby exposing the first adsorption surface 311 and the adsorbed diaphragm 11. Before the second pressing member 320 moves away from the first pressing member 310, the vacuum suction holes on the first adsorption surface 311 need to be evacuated to adsorb the cut diaphragm 11 on the first adsorption surface 311.

[0075] It should be noted that in other embodiments, the diaphragm positioning mechanism 300 can also fix the diaphragm 11 between the swing roller mechanism 200 and the lamination table 110 in other ways. For example, the first adsorption surface 311 directly adsorbs and fixes the diaphragm 11.

[0076] Alternatively, flip-up claws (not shown in the figure) are provided at both ends of the first pressing member 310. When the diaphragm 11 needs to be fixed, the claws flip towards the first adsorption surface 311 to press the diaphragm 11 against the first adsorption surface 311; after the cutting mechanism 400 cuts the diaphragm 11, the claws can flip away from the first adsorption surface 311, thus avoiding the first adsorption surface 311 and the diaphragm 11 adsorbed on the first adsorption surface 311.

[0077] Furthermore, in this embodiment, air blowing holes (not shown in the figure) are provided on the surface of the second pressing member 320 facing the lamination table 110 and / or the first pressing member 310. The air blowing holes can be connected to an air blowing device through a pipeline, so as to be able to blow air outwards. The surface of the second pressing member 320 facing the lamination table 110 is Figure 1 the left surface of the second pressing member 320 as shown. After the diaphragm 11 is cut, blowing air through the air blowing holes on this surface can prevent the free section of the diaphragm 11 from being electrostatically adsorbed to the second pressing member 320. In addition, during the separation process of the second pressing member 320 and the first pressing member 310, blowing air towards the diaphragm 11 through the air blowing holes facing the first pressing member 310 can prevent the diaphragm 11 from adhering to the second pressing member 320, thereby avoiding tearing the diaphragm 11.

[0078] In this embodiment, the auxiliary pressing member 330 is mounted on the second pressing member 320, and after the cutting mechanism 400 cuts off the diaphragm 11 between the first pressing member 310 and the laminating table 110, the auxiliary pressing member 330 can move relative to the second pressing member 320 to force the portion of the diaphragm 11 extending out of the first adsorption surface 311 to bend towards the support surface 312.

[0079] The auxiliary pressing member 330 can flip or translate relative to the second pressing member 320, so as to push the free section of the diaphragm 11 to bend. Specifically, the auxiliary pressing member 330 is connected to the side of the second pressing member 320 facing the laminating table 110 through two connecting rods 340, that is, Figure 1 the left side shown. Both ends of the connecting rod 340 are rotatably connected to the auxiliary pressing member 330 and the second pressing member 320 respectively. As Figure 5 shown, in the initial state, the auxiliary pressing member 330 abuts against the side surface of the second pressing member 320 and retracts upward along the second direction relative to the second pressing member 320. As Figure 6 shown, when the diaphragm 11 is cut off and a free section is formed, the counterclockwise rotation of the connecting rod 340 can drive the auxiliary pressing member 330 to move downward from top to bottom along the second direction, so as to push the free section of the diaphragm 11 to bend until it fits against the support surface 312.

[0080] Obviously, in other embodiments, one end of the auxiliary pressing member 330 can also be rotatably mounted on the second pressing member 320 through a pin shaft, and the free section of the diaphragm 11 can be pushed to bend by flipping. In addition, the auxiliary pressing member 330 can also be driven by an independent driving member.

[0081] In this embodiment, the second pressing member 320 is mounted on the swing roller mechanism 200, and after the lamination is completed, the second pressing member 320 can move to the upper part of the first pressing member 310 along with the swing roller mechanism 200.

[0082] The relative positions of the second pressing member 320 and the swing roller mechanism 200 are pre-calibrated, so that when the swing roller mechanism 200 moves to the lamination end station, the second pressing member 320 just moves to the upper part of the first pressing member 310. In this way, after the lamination is completed, it is not necessary to adjust the position of the second pressing member 320 anymore, and the second pressing member 320 and the first pressing member 310 can be used in cooperation to clamp and fix the diaphragm 11, so that time can be effectively saved.

[0083] In addition, the diaphragm positioning mechanism 300 further includes a second driving member 350 provided on the swing roller mechanism 200. The second driving member 350 can be a cylinder or an electric cylinder, and the second driving member 350 can drive the second pressing member 320 to move along the second direction. When it is necessary to fix the diaphragm 11, the second driving member 350 drives the second pressing member 320 to move towards the first pressing member 310 along the second direction, and the diaphragm 11 can be pressed against the first adsorption surface 311.

[0084] Combined with the accompanying drawings of the specification Figures 8 to 20 , a brief description of the working process of the Figure 1 laminating device 10 shown will be given as follows:

[0085] After the lamination of the first battery cell 12 is completed, the lamination device 10 is in the Figure 8 state shown. At this time, the battery cell 12 is held by the pressing blade 151 on the lamination table 110. The swing roller mechanism 200 is located at the lamination end station. The first adsorption surface 311 is substantially flush with the upper surface of the battery cell 12. The second pressing member 320 is located above the first pressing member 310. The diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 passes through between the second pressing member 320 and the first pressing member 310. The auxiliary pressing member 330 is in the initial state.

[0086] The second driving member 350 drives the second pressing member 320 to move downward until it abuts against and clamps the diaphragm 11 with the first pressing member 310. After the second pressing member 320 abuts against the first pressing member 310, the vacuum generating device can be started to vacuum adsorb the diaphragm 11 through the vacuum adsorption holes on the first adsorption surface 311 to further enhance the fixing effect of the diaphragm 11, or the vacuum generating device can be temporarily not started, and the diaphragm 11 can be fixed only by the clamping action of the second pressing member 320 and the first pressing member 310. Then, the partition driving member 212 drives the pressing member 213 to abut against the rotating roller 211, thereby clamping the diaphragm 11. Since the partition assembly 210 partitions the diaphragm 11 only after the diaphragm positioning mechanism 300 fixes the diaphragm 11, it is possible to avoid pulling the diaphragm 11 during the process of the second driving member 350 pressing the diaphragm 11 against the first pressing member 310. At this time, the lamination device 10 is in the Figure 9 state shown.

[0087] The cutting mechanism 400 enters the cutting station and drives the lower wire clamping jaw 500 to move to a position where it can grasp the stacked battery cells 12. Then, the cutting mechanism 400 is started, the cutting blade 410 moves downward from top to bottom to cut the diaphragm 11, and the lower wire clamping jaw 500 grabs the battery cells 12 on the lamination table 110. At this time, the lamination device 10 is in the Figure 10 state shown.

[0088] The pressing blade 151 retracts, and the pressing assembly 150 switches to the avoidance state. Then, the cutting mechanism 400 is controlled to withdraw from the cutting station, and the lower wire clamping jaw 500 also moves the battery cells 12 out of the lamination table 110 accordingly. It can be seen that the cut diaphragm 11 is still fixed by the cooperation of the second pressing member 320 and the first pressing member 310, and a free section of the cut diaphragm 11 will extend out of the first pressing member 310. At this time, the lamination device 10 is in the Figure 11 state shown.

[0089] The control link 340 rotates counterclockwise to drive the auxiliary pressing member 330 to move downward along the second direction, so that the auxiliary pressing member 330 presses the free section extending from the first pressing member 310 downward, causing the free section to bend toward the support surface 312 until the free section bends to abut against the support surface 312 of the first pressing member 310. In order to more stably position the free section of the diaphragm 11, the vacuum generating device can be activated to evacuate the vacuum adsorption holes on the support surface 312, so that the free section is adsorbed on the support surface 312. At this time, the laminating device 10 is in Figure 12 the state shown.

[0090] The auxiliary pressing member 330 is controlled to reset, and the second driving member 350 drives the second pressing member 320 to move upward until it separates from the first adsorption surface 311, and the cut diaphragm 11 is adsorbed and fixed by the first pressing member 310. Then, the main driving swing roller 220 moves along the first direction toward the first pressing member 310, so that the diaphragm 11 between the partition assembly 210 and the first pressing member 310 is in a relaxed state, so as to reserve the margin for driving the diaphragm 11 to move when the first pressing member 310 approaches the laminating table 110 along the first direction. At the same time, the first lifting assembly 130 drives the laminating table 110 to rise along the second direction until the bearing surface 111 is flush or substantially flush with the first adsorption surface 311. At this time, the laminating device 10 is in Figure 13 the state shown.

[0091] The first pressing member 310 is controlled to approach the laminating table 110 along the first direction until the support surface 312 abuts against the side surface 112, so as to clamp the diaphragm 11 between the support surface 312 and the side surface 112, thereby positioning the free section of the diaphragm 11 on the laminating table 110. At this time, the laminating device 10 is in Figure 14 the state shown. Then, the vacuum generating device stops evacuating the vacuum adsorption holes on the first adsorption surface 311 and the support surface 312, and the first pressing member 310 releases the adsorption of the diaphragm 11.

[0092] The partition driving member 212 drives the pressing member 213 to separate from the rotating roller 211, thereby releasing the diaphragm 11, and the diaphragm 11 is straightened under the action of tension (see Figure 15 ). The swing roller mechanism 200 moves a certain distance along the first direction from the laminating end station to the laminating start station, so as to lay a preset length of the diaphragm 11 on the bearing surface 111. Specifically, the preset length is equal to the total length of the first-layer diaphragm minus the length of the diaphragm 11 on the side of the laminating table 110 (see Figure 16 ). Then, the partition assembly 210 clamps the diaphragm 11 again and separates from the laminating table 110 (see Figure 17) To improve the stability and accuracy of the diaphragm 11 during movement, the vacuum generating device can also be activated to form a negative pressure on the bearing surface 111 through the negative pressure holes 101, thereby adsorbing the diaphragm 11.

[0093] The partition assembly 210 maintains the clamping of the diaphragm 11, and the swing roller mechanism 200 continues to move in the first direction towards the lamination starting station until the swing roller mechanism 200 reaches the lamination starting station. During this process, the diaphragm 11 on the side of the lamination table 110 is gradually dragged to the bearing surface 111, thus completing the laying of the first layer of the diaphragm. At this time, the lamination device 10 is in Figure 18 the state shown.

[0094] The pressing assembly 150 switches to the pressing state, and the pressing knife 151 presses the first layer of the diaphragm against the bearing surface 111 (see Figure 19 ). Then, the partition driving member 212 acts to release the diaphragm 11 by the partition assembly 210 (see Figure 20 ). At this time, the swing roller mechanism 200 moves to the lamination starting station, and the laying of the first layer of the diaphragm is also completed. The tension of the diaphragm 11 is restored to the tension required for lamination. Therefore, the picking mechanism can be activated to perform the lamination of the next battery cell.

[0095] As Figure 7 shown, in another embodiment of the present invention, the second pressing member 320 is installed on the cutting mechanism 400, and when the cutting mechanism 400 enters the cutting station, the second pressing member 320 can move above the first pressing member 310 along with the cutting mechanism 400.

[0096] The relative position between the second pressing member 320 and the cutting mechanism 400 is pre-calibrated, so that when the cutting mechanism 400 moves to the cutting station, the second pressing member 320 just moves above the first pressing member 310. In this way, after lamination is completed, it is only necessary to control the cutting mechanism 400 to enter the cutting station, and there is no need to adjust the position of the second pressing member 320 anymore, so time can be effectively saved.

[0097] At this time, due to the occupation of the second pressing member 320, the offline gripper 500 needs to be separately arranged from the cutting mechanism 400 and driven by a separate driving member.

[0098] When the cutting mechanism 400 enters the cutting station, the second pressing member 320 can move towards the first pressing member 310 along the second direction under the drive of a separate driving member, so as to cooperate with the first pressing member 310 to fix the diaphragm 11. In addition, the second pressing member 320 can also move towards the first pressing member 310 along the second direction with the cutting knife 410 during the process of the cutting mechanism 400 cutting the diaphragm 11, and press the diaphragm 11 against the first adsorption surface 311 before the cutting knife 410 cuts off the diaphragm 11.

[0099] Further, in this embodiment, the cutting mechanism 400 includes a cutting knife 410, a cutting driving member 420, a support 430, and an elastic member 440.

[0100] The support 430 plays a supporting role. The cutting knife 410 and the second pressing member 320 are both installed on the support 430, and the elastic member 440 is arranged between the second pressing member 320 and the support 430. The elastic member 440 can be a spring, a cylinder, an elastic sleeve, etc. The cutting driving member 420 can drive the support 430 to move in the second direction, thereby driving the cutting knife 410 and the second pressing member 320 to move in the second direction. Supported by the elastic member 440, the second pressing member 320 protrudes towards the first pressing member 310 relative to the cutting knife 410. Therefore, when the cutting mechanism 400 starts to cut the diaphragm 11 and the cutting driving member 420 drives the support 430 to move towards the first pressing member 310 in the second direction, the second pressing member 320 can contact the diaphragm 11 before the cutting knife 410 and press the diaphragm 11 against the first pressing member 310. As the support 430 continues to move, the elastic member 440 can be compressed and deformed to make the cutting knife 410 extend in the second direction relative to the second pressing member 320 until the diaphragm 11 is cut off.

[0101] It can be seen that there is no need to additionally set a driving member to realize the movement of the second pressing member 320 in the second direction, so the structure of the diaphragm positioning mechanism 300 can be further simplified.

[0102] Next, in combination with Figures 21 to 25 , the working process of the laminating device 10 in another embodiment will be briefly described:

[0103] After the lamination of the first battery cell is completed, the laminating device 10 is in the Figure 21 state shown. At this time, the battery cell 12 is pressed by the pressing knife 151 against the laminating table 110. The swing roller mechanism 200 is located at the lamination end station. The first adsorption surface 311 is substantially flush with the upper surface of the battery cell 12, and the diaphragm 11 between the output end of the swing roller mechanism 200 and the laminating table 110 passes above the first pressing member 310.

[0104] The cutting mechanism 400 enters the cutting station and drives the second pressing member 320 to move above the first pressing member 310. Then, the partition driving member 212 drives the pressing member 213 to abut against the rotating roller 211, thereby clamping the diaphragm 11. The main driving swing roller 220 moves towards the first pressing member 310 in the first direction, so that the diaphragm 11 between the partition assembly 210 and the laminating table 110 is in a relaxed state. At the same time, the vacuum generating device is started to make the first adsorption surface 311 adsorb the diaphragm 11. At this time, the laminating device 10 is in the Figure 22 state shown.

[0105] The cutting driving member 420 drives the support 430 to move downward in the second direction. The second pressing member 320 contacts the diaphragm 11 before the cutter 410 and presses the diaphragm 11 against the first adsorption surface 311 under the action of the elastic member 440. As the cutting driving member 420 continues to drive downward, the cutter 410 extends downward relative to the first pressing member 320 and cuts off the diaphragm 11 between the lamination table 110 and the first pressing member 310. At this time, the lamination device 10 is in Figure 23 the state shown.

[0106] The control link 340 rotates counterclockwise and drives the auxiliary pressing member 330 to move downward in the second direction, so that the auxiliary pressing member 330 presses the free section of the diaphragm 11 extending out of the first pressing member 310 downward until the free section is bent to abut against the support surface 312 of the first pressing member 310. In order to better position the free section of the diaphragm 11, the vacuum generating device can be started to evacuate the vacuum adsorption holes on the support surface 312, so that the free section is adsorbed on the support surface 312. At this time, the lamination device 10 is in Figure 24 the state shown.

[0107] The control auxiliary pressing member 330 is reset, and the cutting driving member 420 drives the support 430 to move upward in the second direction to drive the cutter 410 to move upward and separate the second pressing member 320 from the first adsorption surface 310. The cutting mechanism 400 is controlled to drive the second pressing member 320 to withdraw from the cutting station, and the offline gripper 500 starts to grip the battery cell 12 and takes the gripped battery cell 12 away from the bearing surface 111. At the same time, the main driving swing roller 220 moves toward the first pressing member 310 in the first direction, so that the diaphragm 11 between the partition assembly 210 and the first pressing member 310 is in a relaxed state, so as to reserve the margin for driving the diaphragm 11 to move when the first pressing member 310 approaches the lamination table 110 in the first direction. At this time, the lamination device 10 is in Figure 25 the state shown.

[0108] The subsequent steps are substantially the same as those in the previous embodiment Figures 14 to 20 and will not be elaborated here.

[0109] After the battery core lamination of the above lamination device 10 is completed, the diaphragm positioning mechanism 300 fixes the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 to the first adsorption surface 311, the partition component 210 clamps the diaphragm 11, and the cutting mechanism 400 cuts off the diaphragm 11 between the first pressing member 310 and the lamination table 110. The cut diaphragm 11 is adsorbed by the first adsorption surface 311, and the auxiliary pressing member 330 can press the part of the diaphragm 11 extending out of the first adsorption surface 311 against the support surface 312. When the first pressing member 310 moves towards the lamination table 110 in the first direction, the free section of the diaphragm 11 can be clamped between the support surface 312 and the side surface 112. Then, the swing roller mechanism 200 and the lamination table 110 move relatively in the first direction, and cooperate with the partition component 210 to clamp or release the diaphragm 11, so that the first layer of diaphragm can be laid on the bearing surface 111. Since the diaphragm 11 can be adsorbed and fixed by the first adsorption surface 311 before and after cutting, and the free section formed after the diaphragm 11 is cut can be pulled to the lamination table 110 driven by the first pressing member 310, no rectification is required after the first layer of diaphragm is laid. Therefore, the above lamination device 10 can improve the lamination efficiency.

[0110] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0111] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A lamination device, characterized in that, include: The lamination mechanism includes a lamination platform having a bearing surface and a side surface; A swing roller mechanism including a partition assembly, wherein the diaphragm can pass through the swing roller mechanism and be output from the output end of the swing roller mechanism, the swing roller mechanism and the lamination table can move back and forth relative to each other in a first direction so that the diaphragm is laid in a Z-shape on the bearing surface, and the partition assembly can clamp or release the diaphragm; a diaphragm positioning mechanism, comprising a first pressing member and an auxiliary pressing member, wherein the first pressing member is provided on one side of the lamination table along the first direction and is movable along the first direction, the first pressing member comprising a first adsorption surface parallel to the bearing surface and a supporting surface facing the side surface; and A cutting mechanism for cutting off the diaphragm; After lamination is completed, the swing roller mechanism is located on the side of the first holding member facing away from the lamination platform, and the diaphragm positioning mechanism is capable of fixing the diaphragm between the output end of the swing roller mechanism and the lamination platform to the first adsorption surface; the cutting mechanism is capable of cutting the diaphragm between the first holding member and the lamination platform; After the diaphragm is cut, the auxiliary pressing member can force the portion of the diaphragm extending from the first adsorption surface to bend toward the support surface, and the first pressing member moves toward the lamination table along the first direction until the support surface holds the diaphragm against the side surface.

2. The lamination device according to claim 1, wherein The diaphragm positioning mechanism further includes a second pressing member, which is capable of moving along a second direction perpendicular to the bearing surface and pressing the diaphragm between the output end of the swing roller mechanism and the lamination table against the first adsorption surface.

3. The lamination device according to claim 2, wherein, The auxiliary pressing member is installed on the second pressing member, and after the cutting mechanism cuts off the diaphragm between the first pressing member and the laminating table, the auxiliary pressing member can move relative to the second pressing member to force the part of the diaphragm extending out of the first adsorption surface to bend toward the support surface.

4. The laminating device according to claim 3, wherein, The supporting surface and the first adsorption surface are both provided with vacuum adsorption holes for adsorbing the diaphragm.

5. The lamination device according to claim 2, characterized in that, The second pressing member is provided with a blowing hole on a surface facing the lamination platform and / or the first pressing member.

6. The lamination device according to claim 2, wherein The second pressing member is installed on the swing roller mechanism, and after lamination is completed, the second pressing member can move with the swing roller mechanism to above the first pressing member.

7. The lamination device according to claim 2, wherein The second pressing member is installed on the cutting mechanism, and when the cutting mechanism enters a cutting station capable of cutting the diaphragm between the first pressing member and the laminating table, the second pressing member can move with the cutting mechanism to above the first pressing member.

8. The lamination device according to claim 7, characterized in that, The cutting mechanism includes a cutting knife, a cutting driving member, a support and an elastic member. The cutting knife and the second pressing member are both installed on the support. The elastic member is arranged between the second pressing member and the support. The cutting driving member can drive the support to move along the second direction. During the process of the support moving along the second direction towards the first pressing member, the second pressing member can contact the diaphragm first and press the diaphragm against the first pressing member. And as the support continues to move, the elastic member can be compressed and deformed to make the cutting knife move along the second direction relative to the second pressing member until the diaphragm is cut off.

9. The lamination device according to claim 1, characterized in that, The laminating mechanism includes a support main body and a first lifting assembly. The first lifting assembly, the laminating table and the first pressing member are all installed on the support main body, and the laminating table can move along a second direction perpendicular to the bearing surface under the drive of the first lifting assembly.

10. The lamination device according to claim 9, characterized in that, The laminating mechanism further includes a second lifting assembly. The support main body is arranged on the moving end of the second lifting assembly and can move along the second direction under the drive of the second lifting assembly.

11. The lamination device according to claim 1, characterized in that, Negative pressure holes are formed in the bearing surface, and the bearing surface can vacuum adsorb the diaphragm laid on the bearing surface through the negative pressure holes.

12. The lamination device according to claim 1, wherein, The cutting mechanism includes a cutting knife, and an insulating protective layer is arranged on one side of the cutting knife. When the cutting mechanism enters the cutting station where the diaphragm between the first pressing member and the laminating table can be cut off, the insulating protective layer is located on the side of the cutting knife facing the laminating table.

13. The lamination device according to claim 1, wherein It further includes a lower line jaw fixedly connected to the cutting mechanism. The lower line jaw is used for clamping the battery cell located on the bearing surface. Wherein, the lower line jaw can move along with the cutting mechanism to drive the clamped battery cell away from the bearing surface.

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