Laminated device

Abstract

The present application relates to a kind of lamination device, after the completion of cell lamination, diaphragm positioning mechanism is fixed between the output end of swing roller mechanism and the diaphragm of lamination table to first adsorption surface.Cutting mechanism cuts diaphragm.The diaphragm after cutting is adsorbed by first adsorption surface, and the part of diaphragm that is stretched out from first adsorption surface is blown to the gap between pressure holding piece and lamination table by blowing assembly.Pressure holding piece moves towards lamination table along first direction until the diaphragm in gap is supported on side surface, and the free section of diaphragm can be positioned.Then, swing roller mechanism and lamination table are relatively moved along first direction, and cooperate with diaphragm to clamp or release diaphragm, and the first layer diaphragm can be laid on bearing surface.Because diaphragm can be adsorbed and fixed by first adsorption surface before and after cutting, and free section can be pulled to lamination table under the drive of pressure holding piece, so first layer diaphragm does not need to be corrected after laying.Therefore, the above-mentioned lamination device can improve lamination efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery equipment, and in particular to a lamination device. BACKGROUND

[0002] In the production process of lithium battery cells, positive electrode sheets and negative electrode sheets are alternately stacked, and a separator is used to separate the positive electrode sheets and the negative electrode sheets. In a Z-type lamination process, the cut electrode sheets are placed on a lamination table one by one, and a separator is folded to cover a layer every time an electrode sheet is placed, so that the separator forms a Z shape. The separator used in the Z-type lamination process is continuous. After the stacking of an electrode sheet is completed, the separator needs to be cut to discharge the electrode sheet. The cut separator first forms a free section with one end swinging, and the free section of the separator needs to be pulled to the lamination table again and used as the first layer of separator for the next electrode sheet.

[0003] After the electrode sheet is discharged, the above-mentioned free section of the separator is generally blown to the bearing surface of the lamination table in a reverse blowing manner. The movement of the separator caused by the airflow blowing has a certain randomness, so the separator is prone to deviation, wrinkling and flanging. Therefore, after reverse blowing, the separator needs to be corrected, and the correction requires a long time, thereby reducing the lamination efficiency. SUMMARY

[0004] Therefore, it is necessary to provide a lamination device with high lamination efficiency to solve the above-mentioned problems.

[0005] A lamination device comprises:

[0006] A lamination mechanism comprising a lamination table, the lamination table having a bearing surface and a side surface;

[0007] A swing roller mechanism comprising a blocking assembly, the separator being capable of passing through the swing roller mechanism and being output from the output end of the swing roller mechanism, the swing roller mechanism and the lamination table being capable of reciprocating relative to each other in a first direction to enable the separator to be laid in a Z shape on the bearing surface, the blocking assembly being capable of clamping or releasing the separator;

[0008] A separator positioning mechanism comprising a pressing member and a blowing assembly, the pressing member being arranged on one side of the lamination table along the first direction and being capable of moving along the first direction, the pressing member comprising a first adsorption surface parallel to the bearing surface; and

[0009] A cutting mechanism for cutting the separator;

[0010] The lamination mechanism further comprises a supporting body and a first lifting assembly, the first lifting assembly, the lamination table and the pressing member are all installed on the supporting body, and the lamination table is capable of moving along a second direction perpendicular to the bearing surface under the driving of the first lifting assembly.

[0011] In one of the embodiments, the pressing member further comprises a second adsorption surface, the second adsorption surface is towards the side surface to adsorb the diaphragm blown into the gap by the blowing assembly.

[0012] In one of the embodiments, the lamination mechanism further comprises a supporting body and a first lifting assembly, the first lifting assembly, the lamination table and the pressing member are all installed on the supporting body, and the lamination table is capable of moving along a second direction perpendicular to the bearing surface under the driving of the first lifting assembly.

[0013] In one of the embodiments, the lamination mechanism further comprises a second lifting assembly, the supporting body is arranged at the moving end of the second lifting assembly and is capable of moving along the second direction under the driving of the second lifting assembly.

[0014] In one of the embodiments, the diaphragm positioning mechanism further comprises a deflection roller, the deflection roller is arranged at the side of the pressing member away from the lamination table, and the diaphragm between the output end of the swing roller mechanism and the pressing member is capable of winding around the deflection roller.

[0015] In one of the embodiments, the second direction is a vertical direction, the supporting body is lifted to a certain height under the driving of the second lifting assembly, so that the diaphragm between the output end of the swing roller mechanism and the lamination table is attached to the first adsorption surface, so as to adsorb and fix the diaphragm by the first adsorption surface.

[0016] In one of the embodiments, a vacuum adsorption hole is arranged on the bearing surface, and the bearing surface is capable of adsorbing the diaphragm laid on the bearing surface by the vacuum adsorption hole.

[0017] In one of the embodiments, the lamination mechanism further comprises a pressing assembly, the pressing assembly comprises a pressing state and an avoiding state, and when the pressing assembly is in the pressing state, the pressing assembly is capable of pressing the pole piece and the diaphragm to the bearing surface, and when the pressing assembly is in the avoiding state, the pressing assembly is capable of avoiding the bearing surface.

[0018] In one of the embodiments, the cutting mechanism comprises a cutter, one side of the cutter is provided with an insulation protective layer, and when the cutting mechanism enters a cutting station capable of cutting the diaphragm between the pressing member and the lamination table, the insulation protective layer is located on the side of the cutter facing the lamination table.

[0019] In one of the embodiments, the blowing assembly is installed on the cutting mechanism, and after the cutting mechanism cuts the diaphragm between the pressing member and the lamination table, the blowing assembly can blow the part of the diaphragm extending out of the first adsorption surface to the gap between the pressing member and the lamination table.

[0020] In one of the embodiments, a lower wire clamping jaw fixedly connected with the cutting mechanism is further included, and the lower wire clamping jaw is used for clamping the battery cell located on the bearing surface.

[0021] In one of the embodiments, the lower wire clamping jaw can move with the cutting mechanism to drive the clamped battery cell away from the bearing surface.

[0022] After the lamination of the battery cell is completed, the diaphragm positioning mechanism fixes the diaphragm between the output end of the swing roller mechanism and the lamination table on the first adsorption surface, the blocking assembly clamps the diaphragm, and the cutting mechanism cuts the diaphragm between the pressing member and the lamination table. The cut diaphragm is adsorbed by the first adsorption surface, and the blowing assembly blows the part of the diaphragm extending out of the first adsorption surface to the gap between the pressing member and the lamination table. The pressing member moves along the first direction towards the lamination table until the diaphragm in the gap is abutted against the side surface, so that the positioning of the free section of the diaphragm is realized. Then, the swing roller mechanism and the lamination table relatively move along the first direction, and cooperate with the blocking assembly to clamp or release the diaphragm, so that the first layer of diaphragm is 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 cutting the diaphragm can be pulled to the lamination table under the driving of the pressing member, the first layer of diaphragm does not need to be corrected after being laid. Therefore, the lamination device can improve the lamination efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] 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 needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a front view of the lamination device in one embodiment of the present application.

[0025] Figure 2 It is a front view of the lamination device in one embodiment of the present application. Figure 1A front view of the lamination mechanism in the lamination device shown;

[0026] Figure 3 A left side view of the lamination mechanism shown; Figure 2

[0027] Figure 4 A top view of the lamination mechanism shown; Figure 2

[0028] Figure 5 A partial structure schematic view of the lamination device containing the cutting mechanism shown; Figure 1

[0029] Figures 6 to 16 A simplified schematic view of the lamination device in the state change during the lamination process shown. Figure 1 DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process operations have not been described in detail in order not to unnecessarily obscure the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In addition, the terms "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] ​​​​In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact or indirectly contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0036] Please refer to Figure 1 The lamination device 10 in an embodiment of the present application includes a lamination mechanism 100, a swing roller mechanism 200, a diaphragm positioning mechanism 300 and a cutting mechanism 400.

[0037] The lamination mechanism 100 can realize the stacking of the pole pieces and the diaphragm, so as to obtain the battery cell. Specifically, the pole pieces include positive pole pieces and negative pole pieces, the positive pole pieces and the negative pole pieces can be alternately stacked on the lamination mechanism 100, and the diaphragm is arranged between adjacent positive pole pieces and negative pole pieces to separate the adjacent positive pole pieces and negative pole pieces.

[0038] In addition, in order to smoothly obtain the pole pieces required for lamination and discharge the battery cell with completed stacking from the lamination mechanism 100, the lamination device 10 in the embodiment further includes a piece taking mechanism (not shown in the figure) and a offline clamp jaw 500.

[0039] Please refer to Figure 2 and Figure 3The lamination mechanism 100 comprises a lamination table 110. The lamination table 110 can be a plate-shaped structure formed of a material with high mechanical strength such as metal, generally rectangular. The lamination table 110 has a bearing surface 111 and side surfaces 112 distributed on the side of the lamination table 110. In specific use, the bearing surface 111 of the lamination table 110 faces upward and is used to bear the pole pieces and the diaphragm, and the piece taking mechanism can obtain the pole pieces and place the pole pieces on the bearing surface 111 in sequence. The bearing surface 111 and the side surface 112 generally form an angle of 90 degrees, so when the bearing surface 111 faces upward, the side surface 112 faces left or right.

[0040] For reference Figure 4 In this embodiment, the bearing surface 111 is provided with vacuum adsorption holes 101, and the bearing surface 111 can adsorb the diaphragm laid on the bearing surface 111 through the vacuum adsorption holes 101.

[0041] Specifically, the vacuum adsorption holes 101 can be uniformly distributed on the bearing surface 111, or can be distributed only at specific positions of the bearing surface 111, such as one side edge. The vacuum adsorption holes 101 can be connected to a vacuum generating device through a pipeline, so as to form negative pressure on the contact surface between the bearing surface 111 and the diaphragm. When laminating, a layer of diaphragm, i.e. the first layer of diaphragm, needs to be laid on the bearing surface 111. The vacuum adsorption holes 101 can reliably adsorb the first layer of diaphragm on the bearing surface 111, so as to prevent the first layer of diaphragm from being displaced during the lamination process, and help to improve the quality of the battery cell.

[0042] In this embodiment, the lamination mechanism 100 further comprises a support body 120 and a first lifting assembly 130, and the first lifting assembly 130 and the lamination table 110 are both installed on the support body 120, and the lamination 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 upward and downward direction shown. The first lifting assembly 130 can be a pneumatic cylinder, an electric cylinder, or a motor and a matching threaded screw pair. It can be seen that the first lifting assembly 130 can adjust the height of the lamination table 110 as needed during the lamination process, so as to ensure the smooth progress of the lamination process.

[0043] Specifically, the piece taking mechanism places one pole piece on the bearing surface 111 each time, and the first lifting assembly 130 drives the lamination table 110 to descend by a height of one pole piece thickness, so as to ensure that the upper surface of the battery cell always maintains at a predetermined height.

[0044] Further, in the embodiment, the laminating mechanism 100 further comprises a second lifting assembly 140, the support body 120 is arranged at the moving end of the second lifting assembly 140 and can move along the second direction under the driving of the second lifting assembly 140. The second lifting assembly 140 can have the same structure as the first lifting assembly 130, and the second lifting assembly 140 can adjust the height of the laminating mechanism 100 as a whole, so that the laminating mechanism 100 can be applied to more application scenarios.

[0045] In addition, in the embodiment, the laminating mechanism 100 further comprises a pressing assembly 150, the pressing assembly 150 comprises a pressing state and an avoiding state. When the pressing assembly 150 is in the pressing state, the pole piece and the diaphragm can be pressed on the bearing surface 111, so as to avoid the pole piece and the diaphragm 11 from loosening or deviating after being stacked; and when the pressing assembly 150 is in the avoiding state, the bearing surface 111 can be avoided, so as to facilitate the pole piece and the diaphragm to be smoothly stacked on the bearing surface 111.

[0046] Specifically, the pressing assembly 150 comprises a pressing knife 151 arranged at the edge of the laminating table 110 and a pressing driving member 152, the pressing driving member 152 can drive the pressing knife 151 to move along the direction parallel to the bearing surface and the direction perpendicular to the bearing surface, so as to switch the pressing assembly 150 between the pressing state and the avoiding state. The pressing driving member 152 can be an electric cylinder or an air cylinder, and for the rectangular laminating table 110, the pressing knife 151 is preferably distributed at the four top corners of the laminating table 110.

[0047] Please refer again to Figure 1 In actual use, the swing roller mechanism 200 is located above the laminating table 110, and the continuously unwound diaphragm 11 can pass through the swing roller mechanism 200 and be output from the output end of the swing roller mechanism 200. Specifically, the output end of the swing roller mechanism 200 is provided with a main driving swing roller 220, 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 the first direction. The first direction is perpendicular to the second direction, specifically referring to Figure 1 the left-right direction shown in the figure.

[0048] The wound diaphragm 11 can be wound on the tensioning shaft in advance, and continuously unwound from the tensioning shaft to the swing roller mechanism 200 during the laminating 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 the two pole pieces placed on the bearing surface 111 by the taking piece mechanism. Specifically, the swing roller mechanism 200 and the laminating table 110 can relatively reciprocate along the first direction, and cooperate with the taking piece 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 on the bearing surface 111 in a Z-shaped manner, and the stacking of the battery cell is completed.

[0049] Further, the swing roller mechanism 200 comprises a blocking assembly 210 capable of clamping or releasing the diaphragm. The blocking assembly 210 is generally arranged upstream of the output end of the swing roller mechanism 200, and releases the diaphragm during the lamination process; after the lamination is completed, the blocking assembly 210 can be switched between the state of clamping the diaphragm or releasing the diaphragm according to the actual working condition. Specifically, in the embodiment, the blocking assembly 210 comprises a rotating roller 211, a blocking driving member 212, and a pressing member 213 arranged at the driving end of the blocking driving member 212. The diaphragm 11 can pass between the pressing member 213 and the rotating roller 211, and the blocking driving member 212 can drive the pressing member 213 to approach or move away from the rotating roller 211, thereby clamping or releasing the diaphragm 11.

[0050] Specifically, in the embodiment, the lamination table 110 remains stationary, and is reciprocated along the first direction by the swing roller mechanism 200. Obviously, in other embodiments, the swing roller mechanism 200 can remain stationary and the lamination table 110 can be reciprocated along the first direction.

[0051] Before lamination, the swing roller mechanism 200 first lays the first layer of diaphragm, i.e. the first layer of diaphragm, on the bearing surface 111, and stays at one side of the lamination table 110 in the first direction (see Figure 16 , which can be defined as the lamination starting position. During lamination, the blocking assembly 210 releases the diaphragm 11, the sheet taking mechanism alternately places the positive electrode sheet and the negative electrode sheet on the lamination table 110, and each time an electrode sheet is placed, the swing roller mechanism 200 acts once along the first direction and pulls the diaphragm 11 to cover the electrode sheet, so that an electrode sheet is arranged between adjacent diaphragms 11; the above operation is repeated until the stacked electrode sheets reach the required number of layers, and the preparation of an electric core is completed, and the diaphragm 11 laid on the lamination table 110 is folded into a "Z" shape.

[0052] After lamination, the swing roller mechanism 200 stays at the side of the lamination table 110 in the first direction away from the above-mentioned lamination starting position (see Figure 6 , which in the embodiment is specifically shown as the right side in Figure 1 . At this time, the position of the swing roller mechanism 200 can be defined as the lamination ending position.

[0053] Please refer again to Figure 1 , the diaphragm positioning mechanism 300 comprises a pressing member 310 and a blowing assembly 320. The pressing member 310 is arranged at one side of the lamination table 110 along the first direction and is capable of moving along the first direction. Specifically, the pressing member 310 can be installed on the support main body 120 through a structure of guide rail and sliding block. The pressing member 310 is located at the side of the lamination table 110 facing the above-mentioned lamination ending position, i.e. Figure 1As shown on the right. Moreover, the clamping member 310 is located between the stacking table 110 and the aforementioned stacking end station. The clamping member 310 can be a long strip-shaped plate structure, and its extension direction is consistent with the extension direction of the side surface 112 of the stacking table 110.

[0054] The air blowing assembly 320 is capable of blowing air. Specifically, the air blowing assembly 320 generally includes a pipe and a nozzle. The pipe connects the nozzle to an air source, so that the air blowing assembly 320 can blow air through the nozzle.

[0055] Please refer to it again. Figure 2 The holding member 310 includes a first adsorption surface 311. Moreover, the first adsorption surface 311 is parallel to the bearing surface 111, and the first adsorption surface 311 can adsorb the diaphragm 11. Specifically, the surface of the first adsorption surface 311 is provided with a first adsorption hole (not shown in the figure), and the first adsorption hole can be connected to a vacuum generating device through a pipeline, thereby forming a negative pressure on the first adsorption surface 311.

[0056] by Figure 2 As shown in the example, the first adsorption surface 311 is the upper surface of the pressure holding member 310. It should be noted that the first adsorption surface 311 is parallel to the bearing surface 111, which means that the first adsorption surface 311 and the bearing surface 111 are basically aligned, but they do not have to be strictly parallel.

[0057] After stacking is completed, the oscillating roller mechanism 200 stops at the stacking end position. At this time, the oscillating roller mechanism 200 is located on the side of the holding member 310 facing away from the stacking table 110. That is, the holding member 310 is located between the oscillating roller mechanism 200 and the stacking table 110, so the diaphragm 11 between the output end of the oscillating roller mechanism 200 and the stacking table 110 will pass through the holding member 310, and the first adsorption surface 311 faces the passing diaphragm 11.

[0058] Next, the diaphragm positioning mechanism 300 fixes the diaphragm 11 between the output end of the swing roller mechanism 200 and the stacking table 110 onto the first adsorption surface 311. Specifically, a vacuum generator can be activated to create a negative pressure on the first adsorption surface 311, thereby adsorbing and fixing the diaphragm 11. Alternatively, a holding member (not shown) can be used to press the diaphragm 11 onto the first adsorption surface 311 in a direction perpendicular to the first adsorption surface 311 to achieve fixation.

[0059] The cutting mechanism 400 is located outside the cutting station during the lamination process, so as to avoid interference 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 pressing member 310 and the lamination table 110. Specifically, the cutting station is located between the lamination table 111 and the pressing member 310. The cutting mechanism 400 includes a cutter 410. After the cutting mechanism 400 enters the cutting station, the cutter 410 is driven to move up and down to cut the diaphragm 11 fixed between the pressing member 310 and the lamination table 110.

[0060] Specifically, in the present embodiment, the cutter 410 is a hot cutter. The cutter 410 is powered to heat, which can cut the diaphragm 11 in contact with the cutter 410. Moreover, one side of the cutter 410 is provided with an insulating protective layer 420. When the cutting mechanism 400 enters the cutting station, the insulating protective layer 420 is located on the side of the cutter 410 facing the lamination table 110, i.e. the left side as shown. Figure 1 The insulating protective layer 420 can be made of epoxy resin material and can play a buffering and insulating role. The insulating protective layer 420 can avoid the cutter 410 from colliding with the lamination table 110 during cutting or debugging, prevent the phenomenon of metal-to-metal collision in the powered state, improve safety, and protect the cutter 410 and the lamination table 110.

[0061] After the cutting mechanism 400 cuts the diaphragm 11 between the pressing member 310 and the lamination table 110, the stacked battery cell is disconnected from the diaphragm 11, and the diaphragm 11 will form a free section. The free section formed by cutting the diaphragm 11 will extend to the side of the first adsorption surface 311 facing the lamination table 110, i.e. the left side as shown. Figure 1 Since the diaphragm positioning mechanism 300 fixes the diaphragm 11 before the cutting mechanism 400 performs the cutting operation, the free section formed after the diaphragm 11 is cut can be prevented from being electrostatically adsorbed to the output end of the swing roller mechanism 200. Moreover, the diaphragm 11 can continue to be adsorbed and fixed by the first adsorption surface 311 after being cut, so as to prevent the free section of the diaphragm 11 from moving randomly.

[0062] Further, the air blowing assembly 320 can blow the part of the diaphragm 11 extending from the first adsorption surface 311 to the gap between the pressing member 310 and the lamination table 110. Specifically, the part of the diaphragm 11 extending from the first adsorption surface 311 is the free section formed after cutting. In the initial state, the pressing member 310 and the lamination table 110 are spaced apart along the first direction, so that a gap is formed therebetween. After the diaphragm 11 is cut, the air blowing assembly 320 blows air flow and forces the free section of the diaphragm 11 to bend. Usually, the air blowing assembly 320 can force the free section of the diaphragm 11 to bend by 90 degrees, so that the diaphragm 11 is in close contact with the side surface of the pressing member 310.

[0063] After the free section of the diaphragm 11 is blown to the gap between the pressing member 310 and the lamination table 110, the pressing member 310 first moves towards the lamination table 110 along the first direction until abutting against the lamination table 110, so that the free section of the diaphragm 11 is clamped between the pressing member 310 and the side surface 112. In this way, the free section of the diaphragm 11 can be positioned on the lamination table 110. After the free section of the diaphragm 11 is fixed, the swing roller mechanism 200 moves relative to the lamination table 110 along the first direction, and cooperates with the blocking assembly 210 to clamp or release the diaphragm, so that the first layer of diaphragm is laid on the bearing surface 111. At this time, the swing roller mechanism 200 returns to the above-mentioned lamination starting position, so as to cooperate with the sheet taking mechanism to carry out lamination of the next battery cell.

[0064] Since the diaphragm 11 can be adsorbed and fixed by the first adsorption surface 311 before and after being cut off by the cutting mechanism 400, and the free section of the diaphragm 11 can be pulled to the lamination table 110 under the driving of the pressing member 310, the free section of the diaphragm 11 is prevented from moving randomly during the pulling process to the lamination table 110, so that no deviation correction is needed after the first layer of diaphragm is laid. Therefore, the time length of the interval required for the lamination operation of two battery cells can be significantly shortened, thereby improving the lamination efficiency.

[0065] In the embodiment, the pressing member 310 further comprises a second adsorption surface 312 facing the side surface 112, which can adsorb the diaphragm 11 blown to the gap by the blowing assembly 320. The included angle between the second adsorption surface 312 and the first adsorption surface 311 is also substantially 90 degrees. Similarly, the second adsorption surface 312 can be provided with a second adsorption hole (not shown in the figure), which can be communicated with the vacuum generating device through a pipeline, so that a negative pressure can be formed on the second adsorption surface 312. Therefore, when the blowing assembly 320 blows the free section of the diaphragm 11 to the above-mentioned gap, the second adsorption surface 312 can adsorb and fix the diaphragm 11, so as to realize more stable positioning of the free section.

[0066] In the embodiment, the diaphragm positioning mechanism 300 further comprises a deflection roller 330, which is arranged on the side of the pressing member 310 away from the lamination table 110, and the diaphragm 11 between the output end of the swing roller mechanism 200 and the pressing member 310 can pass through the deflection roller 330. The deflection roller 330 can support and adjust the direction of the diaphragm 11, and can prevent the diaphragm 11 from being abraded by the edge of the pressing member 310 when the relative position of the swing roller mechanism 200 and the pressing member 310 changes.

[0067] Specifically, the support body 120 can be lifted in height under the driving of the second lifting assembly 140, so that the diaphragm 11 between the output end of the swing roller mechanism 200 and the laminating table 110 is attached to the first adsorption surface 311, so that the first adsorption surface 311 adsorbs and fixes the diaphragm 11. At this time, the deflection roller 330 can support the diaphragm 11.

[0068] Please refer to Figure 5 In the embodiment, the air blowing assembly 320 is installed on the cutting mechanism 400, and after the diaphragm 11 between the pressing member 310 and the laminating table 110 is cut off by the cutting mechanism 430, the air blowing assembly 320 can blow the part of the diaphragm 11 extending out of the first adsorption surface 311 to the gap between the pressing member 310 and the laminating table 110.

[0069] Specifically, the relative position of the air blowing assembly 320 and the cutting mechanism 400 is calibrated in advance, so that when the cutting mechanism 400 moves to the cutting station, the air blowing assembly 320 just moves to the air blowing station. The air blowing assembly 320 at the air blowing station can correspond to the part of the diaphragm 11 extending out of the first adsorption surface 311. In this way, the position of the air blowing assembly 320 does not need to be adjusted separately after the lamination is completed, and the free section of the diaphragm 11 can be blown, so that time can be effectively saved.

[0070] Please refer to Figure 1 In the embodiment, the offline clamp jaw 500 is fixedly connected with the cutting mechanism 400, and the offline clamp jaw 500 is used to clamp the battery cell on the bearing surface 111. Moreover, the offline clamp jaw 500 can move with the cutting mechanism 400 to drive the clamped battery cell away from the bearing surface 111.

[0071] Specifically, when the cutting mechanism 400 enters the cutting station, the offline clamp jaw 500 can move with the cutting mechanism 400 to the vicinity of the laminating table 110 and clamp the battery cell on the bearing surface 111; and when the cutting mechanism 400 exits the cutting station, the offline clamp jaw 500 can drive the clamped battery cell away from the bearing surface 111 until the clamped battery cell is moved to the offline position.

[0072] Therefore, the offline clamp jaw 500 is linked with the cutting mechanism 400, and the clamping of the battery cell on the bearing surface 111 can be completed by using the time when the cutting mechanism 400 cuts off the diaphragm 11. When the cutting mechanism 400 finishes cutting and exits the cutting station, the battery cell is separated from the diaphragm 11, and the offline clamp jaw 500 can drive the battery cell away from the laminating table 110 with the cutting mechanism 400. Therefore, the offline operation process of the battery cell can be simplified, so as to help improve the production efficiency.

[0073] It is understood that in other embodiments, the lower clamp 500 and the cutting mechanism 400 may also be driven separately and moved independently by different driving components.

[0074] The following is in conjunction with the accompanying drawings in the instruction manual. Figures 6 to 16 The working process of the above-mentioned stacking device 10 is briefly described as follows:

[0075] After the first cell 12 is stacked, the stacking device 10 is in a state of... Figure 6 The state shown. At this time, the battery cell 12 is pressed by the pressure knife 151 onto the stacking table 110, the swing roller mechanism 200 is located at the stacking end position, the first adsorption surface 311 faces upward and is roughly 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 stacking table 110 is adsorbed and fixed by the first adsorption surface 311.

[0076] The control roller mechanism 200 moves away from the pressure member 310 along the first direction, and the second lifting assembly 140 drives the stacking table 110 and the pressure member 310 to rise synchronously along the second direction, thereby increasing the distance between the stacking table 110 and the pressure member 310 and the roller mechanism 200. This prevents the roller mechanism 200 from interfering with the cutting mechanism 400 cutting the diaphragm 11 and the lower wire gripper 500 gripping the battery cell 12. At this time, the stacking device 10 is in the position of Figure 7 The state shown.

[0077] Obviously, if the distance between the swing roller mechanism 200 and the stacking table 110 and the pressing member 310 is large enough when the stacking end position is located, this step can be omitted and the cutting mechanism 400 and the unloading gripper 500 can directly perform the cutting and unloading operations.

[0078] The partition drive 212 drives the pressing member 213 to abut against the rotating roller 211, thereby clamping the diaphragm 11. The cutting mechanism 400 enters the cutting station, and the unloading gripper 500 moves with the cutting mechanism 400 to a position where it can grasp the stacked battery cells 12. The air blowing assembly 320 enters the air blowing station. At this time, the stacking device 10 is in the position of Figure 8 The state shown.

[0079] The cutting mechanism 400 is activated, and the cutter 410 moves from top to bottom to cut the diaphragm 11, while the lower wire gripper 500 grips the battery cell 12 on the stacking table 110. The cut diaphragm 11 remains held in place by the holding member 310, and the cut diaphragm 11 forms a free section extending from the first adsorption surface 311. The air blowing assembly 320, located at the air blowing station, blows gas onto the free section of the diaphragm 11, causing the free section to bend downwards until it is adsorbed by the second adsorption surface 312. At this time, the stacking device 10 is in... Figure 9 The state shown.

[0080] The pressure knife 151 retracts, and the clamping assembly 150 switches to the avoidance state. Next, the control cutting mechanism 400 withdraws from the cutting station, and the unloading gripper 500 moves the battery cell 12 out of the stacking table 110. The air blowing assembly 320 also moves out of the air blowing station along with the cutting mechanism 400. The diaphragm 11 continues to be adsorbed and fixed by the cooperation of the first adsorption surface 311 and the second adsorption surface 312. At this time, the stacking device 10 is in... Figure 10 The state shown.

[0081] The first lifting assembly 130 drives the stacking table 110 to rise along the second direction until the bearing surface 111 is flush with or approximately flush with the first adsorption surface 311. Next, the holding member 310 is controlled to approach the stacking table 110 along the first direction until the second adsorption surface 312 abuts against the side surface 112, thereby clamping the diaphragm 11 between the second adsorption surface 312 and the side surface 112, thus positioning the free section of the diaphragm 11 on the stacking table 110. During the process of the holding member 310 approaching the stacking table 110, the swing roller mechanism 200 can move in the same direction to avoid pulling on the diaphragm 11. At this time, the stacking device 10 is in... Figure 11 The state shown.

[0082] The second lifting assembly 140 drives the stacking platform 110 and the pressing member 310 to descend synchronously along the second direction until the stacking platform 110 and the pressing member 310 are located below the main drive roller 220 of the roller mechanism 200. The isolation drive member 212 drives the pressing member 213 to separate from the rotating roller 211, thereby releasing the diaphragm 11, which straightens under tension. At this time, the stacking device 10 is in the position of Figure 12 The state shown. Next, the vacuum generator stops evacuating the first and second adsorption holes, and the holding member 310 releases the adsorption of the diaphragm 11.

[0083] The oscillating roller mechanism 200 moves a certain distance along the first direction from the stacking end position to the stacking start position, thereby laying a diaphragm 11 of a preset length on the bearing surface 111. Specifically, this preset length is equal to the total length of the first layer of diaphragms minus the length of the diaphragm 11 located on the side of the stacking table 110. At this time, the stacking device 10 is in... Figure 13 The state shown.

[0084] The partition assembly 210 clamps the diaphragm 11 again, and the clamping member 310 moves away from the stacking stage 110 along the first direction. At this time, the stacking device 10 is in the position... Figure 14 The state shown.

[0085] The cutting-off assembly 210 keeps clamping the diaphragm 11, the swing roller mechanism 200 continues to move towards the starting work station of the laminating table in the first direction until the swing roller mechanism 200 reaches the starting work station of the laminating table. During this process, the diaphragm 11 located at the side of the laminating table 110 is gradually dragged to the bearing surface 111, thereby completing the laying of the first layer of diaphragm. In order to improve the stability and accuracy of the diaphragm 11 during the movement, a vacuum generating device can also be started to form negative pressure on the bearing surface 111 through the vacuum suction holes 101, thereby achieving suction of the diaphragm 11. At this time, the laminating device 10 is in the state shown in FIG. 6. Figure 15

[0086] The pressing assembly 150 switches to the pressing state, and the pressing knife 151 presses and holds the first layer of diaphragm on the bearing surface 111. Then, the cutting-off driving member 212 drives the pressing member 213 to separate from the rotating roller 211, thereby releasing the diaphragm 11. At this time, the laminating device 10 is in the state shown in FIG. 7. The swing roller mechanism 200 moves to the starting work station of the laminating table, and the laying of the first layer of diaphragm is also completed. The tension of the diaphragm 11 is restored to the required tension for laminating, so the taking mechanism can be started to laminate the next battery cell. Figure 16

[0087] The laminating device 10 described above, after the laminating of the battery cell is completed, the diaphragm positioning mechanism 300 fixes the diaphragm 11 between the output end of the swing roller mechanism 200 and the laminating table 110 on the first suction surface 311, the cutting-off assembly 210 clamps the diaphragm 11, and the cutting mechanism 400 cuts the diaphragm 11 between the pressing member 310 and the laminating table 110. The cut diaphragm 11 is suctioned by the first suction surface 311, and the blowing assembly 320 blows the part of the diaphragm 11 extending out of the first suction surface 311 to the gap between the pressing member 310 and the laminating table 110. The pressing member 310 moves towards the laminating table 110 in the first direction until the diaphragm 11 in the gap is pressed against the side surface 112, thereby positioning the free section of the diaphragm 11. Then, the swing roller mechanism 200 and the laminating table 110 move relatively in the first direction, and cooperate with the cutting-off assembly 210 to clamp or release the diaphragm 11, thereby laying the first layer of diaphragm on the bearing surface 111. Since the diaphragm 11 can be suctioned and fixed by the first suction surface 311 before and after cutting, and the free section formed after the diaphragm 11 is cut can be pulled to the laminating table 110 under the driving of the pressing member 310, the first layer of diaphragm does not need to be corrected after being laid. Therefore, the laminating device 10 described above can improve the laminating efficiency.

[0088] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0089] ​​The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A lamination device, characterized by The laminating mechanism comprises a laminating table having a bearing surface and a side surface; The swing roller mechanism comprises a blocking assembly, the diaphragm can pass through the swing roller mechanism and be output by the output end of the swing roller mechanism, the swing roller mechanism and the laminating table can reciprocate along the first direction to make the diaphragm lay on the bearing surface in Z shape, the blocking assembly can clamp or release the diaphragm; The diaphragm positioning mechanism comprises a pressing piece and a blowing assembly, the pressing piece is arranged on one side of the laminating table along the first direction and can move along the first direction, the pressing piece comprises a first adsorption surface parallel to the bearing surface; And The cutting mechanism is used for cutting the diaphragm; Wherein, after the laminating is completed, the swing roller mechanism is located on the side of the pressing piece away from the laminating table, the diaphragm between the output end of the swing roller mechanism and the laminating table can be fixed on the first adsorption surface by the diaphragm positioning mechanism; the diaphragm between the pressing piece and the laminating table can be cut off by the cutting mechanism; After the diaphragm is cut off, the blowing assembly can blow the part of the diaphragm extending out of the first adsorption surface to the gap between the pressing piece and the laminating table, the pressing piece moves towards the laminating table along the first direction until the diaphragm in the gap is abutted against the side surface. The pressing piece further comprises a second adsorption surface, the second adsorption surface faces the side surface to adsorb the diaphragm blown into the gap by the blowing assembly.

2. The lamination device of claim 1, wherein The laminating mechanism further comprises a supporting body and a first lifting assembly, the first lifting assembly, the laminating table and the pressing piece are all installed on the supporting body, and the laminating table can move along the second direction perpendicular to the bearing surface under the drive of the first lifting assembly.

3. The lamination device of claim 1, wherein The laminating mechanism further comprises a second lifting assembly, the supporting body is arranged at the moving end of the second lifting assembly and can move along the second direction under the drive of the second lifting assembly.

4. The lamination device of claim 3, wherein The diaphragm positioning mechanism further comprises a deflection roller, the deflection roller is arranged on the side of the pressing piece away from the laminating table, the diaphragm between the output end of the swing roller mechanism and the pressing piece can pass through the deflection roller; 5. The lamination device of claim 4, wherein Wherein, the second direction is vertical direction, the supporting body is lifted to a certain height under the drive of the second lifting assembly, so that the diaphragm between the output end of the swing roller mechanism and the laminating table is attached to the first adsorption surface, so as to adsorb and fix the diaphragm by the first adsorption surface. The bearing surface is provided with vacuum adsorption holes, the diaphragm laid on the bearing surface can be vacuum adsorbed by the vacuum adsorption holes.

6. The lamination device of claim 1, wherein The laminating mechanism further comprises a pressing assembly, the pressing assembly comprises a pressing state and an avoiding state, when the pressing assembly is in the pressing state, the pole piece and the diaphragm can be pressed on the bearing surface, when the pressing assembly is in the avoiding state, the bearing surface can be avoided.

7. The lamination device of claim 1, wherein ​ 8. The lamination device of claim 1, wherein The cutting mechanism comprises a cutter, one side of the cutter is provided with an insulation protective layer, and when the cutting mechanism enters a cutting station capable of cutting the diaphragm between the pressing piece and the lamination table, the insulation protective layer is located on the side of the cutter facing the lamination table.

9. The lamination device of claim 1, wherein, The blowing assembly is installed on the cutting mechanism, and after the cutting mechanism cuts the diaphragm between the pressing piece and the lamination table, the blowing assembly can blow the part of the diaphragm extending out of the first adsorption surface to the gap between the pressing piece and the lamination table.

10. The lamination device of claim 1, wherein, Further comprising a lower wire clamping jaw fixedly connected with the cutting mechanism, the lower wire clamping jaw is used for clamping the battery cell located on the bearing surface; Wherein, the lower wire clamping jaw can move with the cutting mechanism to drive the clamped battery cell away from the bearing surface.

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