Lamination mechanism

Abstract

The utility model discloses a lamination mechanism, and belongs to the technical field of battery manufacturing. The laminating mechanism comprises a laminating assembly for conveying diaphragms, a stacking table assembly, a first feeding mechanism and a second feeding mechanism, the stacking table assembly comprises a stacking table and a pressing knife mechanism, the stacking table is arranged below the laminating assembly, and the first feeding mechanism and the second feeding mechanism are located on the two sides of the stacking table respectively. The first feeding mechanism is used for placing a negative plate on the diaphragm laid on the stacking table, and the second feeding mechanism is used for placing a positive plate on the diaphragm laid on the stacking table; and after the stacking table receives the positive plate at the positive plate receiving position on the first side of the film covering assembly, the stacking table and the film covering assembly move reversely in the horizontal direction at the same time until the stacking table is located at the receiving position on the second side of the film covering assembly so as to receive the negative plate. The moving path of the film covering mechanism and the stacking table is short, and the action mode improves the lamination rhythm and is beneficial to improving the lamination operation efficiency.

Description

Technical Field

[0001] The implementation method of the utility model relates to the field of battery manufacturing technology, in particular, to the field of lithium-ion battery cell manufacturing technology. Specifically, the application relates to a stacking mechanism. Background Art

[0002] In the battery manufacturing process, the preparation method of the battery cell mainly adopts a "Z"-shaped stacking scheme, in which the positive electrode sheet, separator, negative electrode sheet, separator, positive electrode sheet... are alternately stacked on the stacking platform to form a battery cell. In the above stacking scheme, the coating mechanism that transports the separator needs to cyclically move from the left end of the stacking platform to the right end of the stacking platform to lay a layer of separator on the electrode sheet on the stacking platform. After the stacking platform receives a electrode sheet, the coating mechanism moves from the right end of the stacking platform to the left end of the stacking platform to lay the next layer of separator on the electrode sheet.

[0003] There are generally two cyclic movement modes in the prior art. In the first mode, the stacking platform does not move, and the laminating mechanism reciprocates above the stacking platform; in the second mode, the laminating mechanism is different, and the stacking platform reciprocates below the laminating mechanism. Both methods can achieve a "Z"-shaped stacking solution, but both modes have the problem of long reciprocating paths of the laminating mechanism or the stacking platform and slow stacking rhythm, which makes it impossible to further improve the stacking efficiency. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a lamination mechanism to improve the lamination operation rhythm.

[0005] The solution of this application example is implemented through the following contents.

[0006] The example of the present application provides a lamination mechanism, which comprises:

[0007] The membrane covering assembly reciprocates along the horizontal direction, and the membrane covering assembly is used to transmit the diaphragm;

[0008] A stacking table assembly, comprising a stacking table and a pressing knife mechanism, wherein the stacking table is arranged below the film coating assembly and can reciprocate in the horizontal direction, the stacking table is used to receive the laid diaphragm and the battery pole piece placed on the diaphragm, a pair of pressing knife mechanisms are arranged at both ends of the stacking table along the horizontal direction, the two pressing knife mechanisms of each pair of pressing knife mechanisms are arranged oppositely on both sides of the stacking table, the two pairs of pressing knife mechanisms are used to press the laid battery pole pieces in turn, the pressing action of the pressing knife mechanism cooperates with the reciprocating movement of the stacking table and the film coating assembly to realize the folding of the diaphragm, the battery pole piece includes a negative pole piece and a positive pole piece, the stacking table alternately receives the negative pole piece and the positive pole piece on the folded diaphragm on both sides of the film coating assembly to realize the lamination; and,

[0009] A first feeding mechanism and a second feeding mechanism, the first feeding mechanism and the second feeding mechanism are respectively located on both sides of the stacking table, the first feeding mechanism is used to place the negative electrode sheet on the diaphragm laid on the stacking table, and the second feeding mechanism is used to place the positive electrode sheet on the diaphragm laid on the stacking table;

[0010] After the stacking table receives the positive electrode sheet at the positive electrode sheet receiving position on the first side of the coating assembly, the stacking table and the coating assembly simultaneously move in opposite directions in the horizontal direction until the stacking table is at the receiving position on the second side of the coating assembly to receive the negative electrode sheet.

[0011] In the stacking mechanism provided by the present application, after the stacking platform receives the battery electrode, the stacking platform and the coating assembly move toward each other at the same time, or move away from each other at the same time. In the scheme of the present application, the coating mechanism and the stacking platform need to move along a shorter path, and this action mode improves the stacking rhythm and helps to improve the efficiency of the stacking operation.

[0012] In one example, after the stacking table receives the battery electrode sheet, the stacking table and the coating assembly move in opposite directions by equal distances.

[0013] The stacking table and the laminating assembly each move an equal distance, which helps to improve the coordinated rhythm of the two and improve the stacking efficiency.

[0014] In one example, after the stacking table receives the battery electrode sheet, the stacking table and the coating assembly move in opposite directions at the same average speed.

[0015] Limiting the reverse movement of the stacking table and the laminating assembly from the aspects of moving speed and moving distance helps to ensure that the stacking table and the laminating assembly work in a better coordination and realize fast cycle lamination.

[0016] In one example, the stacking table has a first position and a second position at both ends of the reciprocating stroke, and the coating assembly has a third position and a fourth position at both ends of the reciprocating stroke, the third position is located directly above the first position, and the fourth position is located directly above the second position. When the stacking table receives the negative electrode sheet, the stacking table is in the first position and the coating assembly is in the fourth position. When the stacking table receives the positive electrode sheet, the stacking table is in the second position and the coating assembly is in the third position.

[0017] When the stacking table is in the first position and the coating assembly is in the fourth position, the negative electrode sheet is received, which helps to stack the negative electrode sheet on the stretched and tensioned diaphragm to avoid diaphragm wrinkles that affect the quality of the battery cell.

[0018] In one example, the stacking mechanism also includes a battery cell transporting assembly. After the stacking mechanism completes stacking to form a battery cell, the stacking table moves to the first position, the coating assembly moves to the fourth position, and the battery cell transporting assembly moves the battery cell from the stacking table to a side away from the second position, and when the battery cell moves away from the edge of the stacking table, the diaphragm is cut along the edge.

[0019] The battery cell transport assembly moves the battery cell away when the stacking table is in the first position, so the stacking table can directly receive the negative electrode sheet to start the stacking operation of the next battery cell without moving again.

[0020] In one example, when the battery cell transporting assembly moves the battery cell away from the stacking assembly to the side away from the second position, two pressing knife mechanisms close to the battery cell always press the sides of the diaphragm.

[0021] The two pressing knife mechanisms near the battery cell always press the sides of the diaphragm, ensuring that when the diaphragm is cut along the edge, the diaphragm is directly laid on the stacking table. Therefore, when cyclically stacking, the negative electrode sheet can be directly stacked without having to perform an additional diaphragm laying action after cutting the diaphragm. Based on this, the rhythm of cyclic stacking is accelerated and the stacking efficiency is improved.

[0022] In one example, the coating assembly includes a mounting seat, a transmission roller and a film cutting mechanism. The mounting seat can reciprocate in the horizontal direction. The transmission roller and the film cutting mechanism are both arranged on the mounting seat, and the film cutting mechanism is arranged to be liftable on one side of the transmission roller. The transmission roller is used to transmit the diaphragm. When the battery cell is moved away from the edge of the stacking table, the mounting seat moves until the film cutting mechanism is above the edge, and the film cutting mechanism descends and cuts the diaphragm along the edge.

[0023] The film cutting mechanism is arranged on the mounting seat and adjacent to one side of the transmission roller, which improves the utilization rate and integration of the structural components. Compared with the additional independent setting, it saves the redundant setting and space occupation of similar components (such as the mounting seat and the related mechanism for driving the mounting seat to move).

[0024] In one example, the first feeding mechanism includes a first electrode platform and a first conveying assembly, and the second feeding mechanism includes a second electrode platform and a second conveying assembly, wherein:

[0025] The first pole piece platform, the stacking platform and the second pole piece platform are sequentially arranged along the horizontal direction, and the first pole piece platform and the second pole piece platform are respectively arranged on both sides of the stacking platform;

[0026] The first electrode sheet platform is used to receive the negative electrode sheet and correct the posture of the negative electrode sheet. When the stacking table moves to the first position, the first transport assembly places the negative electrode sheet picked up from the first electrode sheet platform on the diaphragm laid on the stacking table.

[0027] The second electrode sheet platform is used to receive the positive electrode sheet and correct the posture of the positive electrode sheet. When the stacking platform moves to the second position, the second transport assembly places the positive electrode sheet picked up from the second electrode sheet platform on the diaphragm laid on the stacking platform.

[0028] By setting the first electrode platform and the second electrode platform to correct the posture of the battery electrode and then place it on the diaphragm, it helps to improve the stacking quality of the battery cell. In addition, receiving the negative electrode at the first position helps to avoid the interference between the movement of the first transport component and the movement of the coating component, and receiving the positive electrode at the second position helps to avoid the interference between the movement of the second transport component and the movement of the coating component.

[0029] In one example, the moving distances of the first transport assembly and the second transport assembly are both twice the moving distance of the stacking table, and the average speeds of the first transport assembly and the second transport assembly are twice the average speed of the stacking table.

[0030] The moving distance and moving speed of the first transport assembly and the second transport assembly are both twice that of the stacking table, so that they can closely cooperate with the stacking operation of the stacking table.

[0031] In one example, the first feeding mechanism also includes a first material table and a first picking component, and the second feeding mechanism also includes a second material table and a second picking component, the first material table is on the side of the first electrode sheet platform away from the stacking table, and the second material table is on the side of the second electrode sheet platform away from the stacking table, the first picking component picks up the negative electrode sheet from the first material table and places it on the first electrode sheet platform, and the second picking component picks up the negative electrode sheet from the second material table and places it on the second electrode sheet platform.

[0032] The first feeding mechanism and the second feeding mechanism are arranged in such a way that the first material table, the first electrode sheet platform, the stacking table, the second electrode sheet platform and the second material table are arranged in sequence in a horizontal direction, so that the movement of the first picking component in transporting the negative electrode sheet is consistent with the movement direction of the first transport component in transporting the negative electrode sheet (similarly, the movement of the second picking component in transporting the positive electrode sheet is consistent with the movement direction of the second transport component in transporting the positive electrode sheet), which facilitates synchronous transport operations and avoids interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a lamination mechanism provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the relative positions of a laminating assembly in a first position and a stacking assembly in a fourth position provided in an embodiment of the present application;

[0035] Figure 3 A schematic structural diagram of a film covering assembly provided in an embodiment of the present application;

[0036] Figure 4 A schematic structural diagram of a stacking assembly provided in an embodiment of the present application.

[0037] In the figure:

[0038] 100, diaphragm;

[0039] 200, laminating assembly; 210, mounting seat; 220, transmission roller; 230, film cutting mechanism; 201, third position; 202, fourth position;

[0040] 300, stacking table assembly; 310, stacking table; 320, knife pressing mechanism; 301, first position; 302, second position;

[0041] 400, first feeding mechanism; 410, first material platform; 420, first picking assembly; 430, first pole piece platform; 440, first transport assembly;

[0042] 500, second feeding mechanism; 510, second material platform; 520, second picking assembly; 530, second electrode platform; 540, second transport assembly. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0044] See also Figures 1 to 4 As shown, the example of the present application provides a laminating mechanism, which includes a laminating assembly 200, a stacking assembly 300, and a first feeding mechanism 400 and a second feeding mechanism 500, wherein:

[0045] The film laminating assembly 200 reciprocates along the horizontal direction, and is used to transmit the diaphragm 100 released from the roll;

[0046] The stacking platform assembly 300 includes a stacking platform 310 and a press mechanism 320. The stacking platform 310 is arranged below the laminating assembly 200 and can reciprocate in the horizontal direction. The stacking platform 310 is used to receive the diaphragm 100 laid in the horizontal direction and the battery electrode sheet placed on the diaphragm 100. The stacking platform 310 has two ends in the horizontal direction (combined with the Figure 2 and Figure 4The left and right ends of the stacking platform 310 are each provided with a pair of knife pressing mechanisms 320, and the pair of knife pressing mechanisms 320 located at the same end include two knife pressing mechanisms 320 arranged oppositely on both sides of the stacking platform 310, and the two pairs of knife pressing mechanisms 320 are used to press the laid battery pole pieces in turn (each time, the two knife pressing mechanisms 320 at the same end slide inward from the opposite side and step forward to finally press the two sides of the battery pole piece), and the pressing action performed by the knife pressing mechanism 320 cooperates with the reciprocating movement of the stacking platform 310 and the film covering assembly 200, so as to realize the folding of the diaphragm 100 on the stacking platform 310; the battery pole pieces of the present application include negative pole pieces and positive pole pieces, and in the process of the diaphragm 100 being folded, the stacking platform 310 alternately receives the negative pole pieces and the positive pole pieces on the folded diaphragm 100 on both sides of the film covering assembly 200 to realize the lamination;

[0047] The first feeding mechanism 400 and the second feeding mechanism 500 are respectively located on both sides of the stacking table 310 . The first feeding mechanism 400 is used to place the negative electrode sheet on the diaphragm 100 laid on the stacking table 310 , and the second feeding mechanism 500 is used to place the positive electrode sheet on the diaphragm 100 laid on the stacking table 310 .

[0048] Furthermore, for the stacking mechanism provided in the embodiment of the present application, after the stacking table 310 receives the positive electrode sheet at the positive electrode sheet receiving position on the first side of the coating assembly 200 (exemplarily, the right side of the coating assembly 200), the stacking table 310 and the coating assembly 200 simultaneously move in opposite directions in the horizontal direction until the stacking table 310 is at the receiving position on the second side of the coating assembly 200 (exemplarily, the left side of the coating assembly 200) to receive the negative electrode sheet. Since after the stacking table 310 receives the battery electrode sheet, the stacking table 310 and the coating assembly 200 simultaneously move toward each other or away from each other, the path that the coating mechanism and the stacking table 310 need to move separately is shorter. Therefore, this action mode improves the beat of the stacking and helps to improve the efficiency of the stacking operation.

[0049] Specifically, in each link of the stacking mechanism's cyclic operation, the structural components involved need to maintain a certain space. For example, when the stacking table 310 receives the battery electrodes (positive electrodes or negative electrodes), the stacking table 310 and the coating assembly 200 need to maintain a certain distance in the horizontal direction. Assume that the value is S.

[0050] Taking the stacking platform 310 moving and the film assembly 200 being fixed as an example, the distance between the positive electrode sheet receiving position and the film assembly 200, and the distance between the negative electrode sheet receiving position and the film assembly 200 are both S, so the distance of the stacking platform 310 moving one way between the positive electrode sheet receiving position and the negative electrode sheet receiving position is 2S. If taking the film assembly 200 moving and the stacking platform 310 being fixed as an example, the distance of the film assembly moving one way is also the same.

[0051] In the stacking mechanism provided in the embodiment of the present application, the stacking table 310 and the coating assembly 200 move in opposite directions in the horizontal direction at the same time, and the distance each moves individually is S, that is, when the stacking table 310 receives the battery electrode (positive electrode or negative electrode), the distance between the stacking table 310 and the coating assembly 200 in the horizontal direction is S. Therefore, relative to the case where the stacking table 310 moves and the coating assembly 200 is fixed, the moving path of the stacking table 310 of the present application is shortened by half. Relative to the case where the coating assembly 200 moves and the stacking table 310 is fixed, the moving path of the coating assembly 200 of the present application is shortened by half.

[0052] In some embodiments, in order to improve the rhythm of the coordination between the two and improve the stacking efficiency, the stacking platform 310 and the coating assembly 200 move the same distance. Specifically, after the stacking platform 310 receives the positive electrode sheet, the distance that the stacking platform 310 moves from the first side of the coating assembly 200 to the second side of the coating assembly 200 (the direction of movement of the coating assembly 200 is opposite to this), and the distance that the coating assembly 200 moves, are equal; after the stacking platform 310 receives the negative electrode sheet, the distance that the stacking platform 310 moves from the second side of the coating assembly 200 to the first side of the coating assembly 200 (the direction of movement of the coating assembly 200 is opposite to this), and the distance that the coating assembly 200 moves, are also equal. In one example, after the stacking platform 310 receives the battery electrode sheet, the average speed of the stacking platform 310 and the coating assembly 200 moving in the opposite direction is the same, so as to ensure that the stacking platform 310 and the coating assembly 200 are better coordinated in operation to achieve stacking.

[0053] In some embodiments, the stacking table 310 has a first position 301 and a second position 302 along the horizontal reciprocating stroke, the first position 301 is at one end of the stacking table 310 reciprocating stroke, and the second position 302 is at the other end of the stacking table 310 reciprocating stroke; similarly, the laminating assembly 200 has a third position 201 and a fourth position 202 along the horizontal reciprocating stroke, the third position 201 is at one end of the laminating assembly 200 reciprocating stroke, and the fourth position 202 is at the other end of the laminating assembly 200 reciprocating stroke. The first position 301 and the second position 302, the third position 201 and the fourth position 202 as above also meet the following conditions: the third position 201 is located directly above the first position 301, and the fourth position 202 is located directly above the second position 302. Furthermore, when the stacking platform 310 receives the negative electrode sheet, the stacking platform 310 is in the first position 301 and the film covering assembly 200 is in the fourth position 202, so as to stretch and unfold the diaphragm 100 laid on the stacking platform 310 as much as possible, ensuring that the negative electrode sheet is stacked on the stretched and tensioned diaphragm 100, thereby preventing the diaphragm 100 from wrinkling and affecting the quality of the battery cell. When the stacking platform 310 receives the positive electrode sheet, the stacking platform 310 is in the second position 302 and the film covering assembly 200 is in the third position 201, which is similarly helpful to ensure that the positive electrode sheet is stacked on the stretched and tensioned diaphragm 100, thereby preventing the diaphragm 100 from wrinkling and affecting the quality of the battery cell.

[0054] In some embodiments, the stacking mechanism further includes a cell handling assembly (not shown in the figure). After the stacking mechanism completes stacking to form a cell, the stacking table 310 moves to the first position 301, the coating assembly 200 moves to the fourth position 202 (at this time, the diaphragm 100 still extends continuously from the cell to the coating assembly 200), and the cell handling assembly moves the cell from the stacking table 310 to the side away from the second position 302, and when the cell moves away from the edge of the stacking table 310, the diaphragm is cut along the edge. The cell handling assembly moves the cell away when the stacking table 310 is in the first position 301, after which the stacking table 310 can directly receive the negative electrode sheet without moving again to start the stacking operation of the next cell.

[0055] In some embodiments, during the process of the cell handling assembly moving the cell away from the stacking stage assembly 300 to the side away from the second position 302, the two pressing knife mechanisms 320 close to the cell always press the side of the diaphragm 100. By using the two pressing knife mechanisms 320 close to the cell always pressing the side of the diaphragm 100, it can be ensured that when the diaphragm 100 is cut along the edge, the diaphragm 100 is directly laid on the stacking stage 310. Therefore, during the cycle stacking, the negative electrode sheet can be directly stacked to start the stacking operation of the next cell, without having to perform an additional diaphragm 100 laying operation after cutting the diaphragm 200. Based on this, the rhythm of the cycle stacking is accelerated and the stacking efficiency is improved.

[0056] In some embodiments, see Figure 2 and Figure 3 As shown, the film coating assembly 200 includes a mounting seat 210, a transmission roller 220 and a film cutting mechanism 230. The mounting seat 210 can reciprocate in the horizontal direction to drive the overall reciprocating movement of the film coating assembly 200. In order to improve the utilization rate and integration of the structural components, the transmission roller 220 and the film cutting mechanism 230 are both arranged on the mounting seat 210, and the film cutting mechanism 230 can be raised and lowered and arranged on one side of the transmission roller 220. Compared with the additional independent arrangement, the film cutting mechanism 230 is arranged on the side of the mounting seat 210 adjacent to the transmission roller 220 to save the redundant arrangement and space occupation of similar components (such as the mounting seat 210 and the related mechanism driving the mounting seat 210 to move). In this embodiment, the transmission roller 220 is used to transmit the diaphragm. When the battery cell moves away from the edge of the stacking table 310, the mounting seat 210 moves to the film cutting mechanism 230 above the edge, and the film cutting mechanism 230 descends and cuts the diaphragm along the edge. The film cutting mechanism 230 is arranged on the mounting seat 210 and is adjacent to one side of the transmission roller 220, which improves the utilization rate and integration of the structural components. Compared with an additional independent setting, it saves the redundant setting and space occupation of similar components (such as the mounting seat 210 and the related mechanisms for driving the mounting seat 210 to move).

[0057] For example, the laminating assembly 200 may use two pairs of transmission rollers 220, which are spaced vertically up and down. The membrane 100 is transmitted by the two pairs of transmission rollers 220, and the transmission direction of the membrane 100 is relatively stable. In a specific implementation, the two pairs of transmission rollers 220 may be arranged on a roller frame so that the transmission rollers 220 are stably supported.

[0058] In some embodiments, the first feeding mechanism 400 includes a first electrode platform 430 and a first conveying assembly 440, and the second feeding mechanism 500 includes a second electrode platform 530 and a second conveying assembly 540, wherein: the first electrode platform 430, the stacking platform 310 and the second electrode platform 530 are arranged in sequence along the horizontal direction, and the first electrode platform 430 and the second electrode platform 530 are respectively arranged on both sides of the stacking platform 310 (refer to Figure 1The first electrode sheet platform 430 is used to receive the negative electrode sheet and correct the posture of the negative electrode sheet on the first electrode sheet platform 430 so that when the negative electrode sheet is placed on the diaphragm 100, the posture of the negative electrode sheet (e.g., the relative position of the side of the negative electrode sheet and the side of the diaphragm) meets the standard. As described above, the first transport component 440 places the negative electrode sheet picked up from the first electrode sheet platform 430 on the diaphragm laid on the stacking table 310 when the stacking table 310 moves to the first position 301. Similarly, the second electrode platform 530 is used to receive the positive electrode sheet and correct the posture of the positive electrode sheet on the second electrode platform 530 so that when the positive electrode sheet is placed on the diaphragm 100, the posture of the positive electrode sheet (e.g., the relative position of the side of the positive electrode sheet and the side of the diaphragm) meets the standard. As described above, the second handling assembly 540 places the positive electrode sheet picked up from the second electrode platform 530 on the diaphragm laid on the stacking table 310 when the stacking table 310 moves to the second position 302. Therefore, based on the above description, by setting the first electrode platform 430 and the second electrode platform 530 to correct the posture of the battery electrode sheet and then place it on the diaphragm, it is helpful to improve the stacking quality of the battery cell.

[0059] In addition, when the stacking table 310 moves to the first position 301 to receive the negative electrode sheet, the coating assembly 200 has moved away from the first position 301. Therefore, the stacking table 310 receiving the negative electrode sheet at the first position 301 helps to avoid the interference between the movement of the first conveying assembly 440 and the movement of the coating assembly 200. For similar reasons, the stacking table 310 receiving the positive electrode sheet at the second position 302 helps to avoid the interference between the movement of the second conveying assembly 540 and the movement of the coating assembly 200.

[0060] In some embodiments, the moving distance of the first conveying assembly 440 and the second conveying assembly 540 is twice the moving distance of the stacking table 310, and the average speed of the first conveying assembly 440 and the second conveying assembly 540 is twice the average speed of the stacking table 310, so as to closely cooperate with the stacking operation of the stacking table 310.

[0061] In some embodiments, the first feeding mechanism 400 further includes a first material table 410 and a first pickup assembly 420, and the second feeding mechanism 500 further includes a second material table 510 and a second pickup assembly 520. The first material table 410, the first electrode platform 430, the stacking platform 310, the second electrode platform 530, and the second material table 510 are arranged in sequence in the horizontal direction, that is, the first material table 410 is on the side of the first electrode platform 430 away from the stacking platform 310, and the second material table 510 is on the side of the second electrode platform 530 away from the stacking platform 310. The first pickup assembly 420 picks up the negative electrode sheet from the first material table 410 and places it on the first electrode platform 430, and the second pickup assembly 520 picks up the negative electrode sheet from the second material table 510 and places it on the second electrode platform 530. Such arrangement makes the first pick-up assembly 420 and the first conveying assembly 440 move in the same direction to carry the negative electrode sheet (similarly, the second pick-up assembly 520 and the second conveying assembly 540 move in the same direction to carry the positive electrode sheet), which facilitates synchronous carrying operations and avoids interference. In addition, the first pick-up assembly 420, the first conveying assembly 440, the second pick-up assembly 520, and the second conveying assembly 540 can use the same moving track extending in the same direction to carry the positive electrode sheet.

[0062] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0063] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present application and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present application.

[0064] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0065] Although multiple embodiments of the present application have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art can think of many changes, modifications and alternatives without departing from the thought and spirit of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments of the present application described herein can be adopted. The attached claims are intended to limit the scope of protection of the present application, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A lamination mechanism, characterized in that: The lamination mechanism comprises: A film covering assembly reciprocates in a horizontal direction, and the film covering assembly is used to transport the diaphragm; A stacking table assembly, comprising a stacking table and a knife pressing mechanism, wherein the stacking table is arranged below the film coating assembly and can reciprocate in the horizontal direction, the stacking table is used to receive the laid diaphragm and the battery pole piece placed on the diaphragm, a pair of knife pressing mechanisms are arranged at both ends of the stacking table along the horizontal direction, the two knife pressing mechanisms of each pair of knife pressing mechanisms are arranged oppositely on both sides of the stacking table, the two pairs of knife pressing mechanisms are used to press the laid battery pole pieces in turn, the pressing action of the knife pressing mechanism cooperates with the reciprocating movement of the stacking table and the film coating assembly to realize the folding of the diaphragm, the battery pole piece includes a negative pole piece and a positive pole piece, the stacking table alternately receives the negative pole piece and the positive pole piece on the folded diaphragm on both sides of the film coating assembly to realize the stacking; and, A first feeding mechanism and a second feeding mechanism, wherein the first feeding mechanism and the second feeding mechanism are respectively located on two sides of the stacking table, the first feeding mechanism is used to place the negative electrode sheet on the diaphragm laid on the stacking table, and the second feeding mechanism is used to place the positive electrode sheet on the diaphragm laid on the stacking table; After the stacking table receives the positive electrode sheet at the positive electrode sheet receiving position on the first side of the coating assembly, the stacking table and the coating assembly simultaneously move in opposite directions in the horizontal direction until the stacking table is at the receiving position on the second side of the coating assembly to receive the negative electrode sheet.

2. The lamination mechanism according to claim 1, characterized in that: After the stacking platform receives the battery pole piece, the stacking platform and the coating assembly move in opposite directions by equal distances.

3. The lamination mechanism according to claim 2, characterized in that: After the stacking platform receives the battery pole piece, the stacking platform and the coating assembly move in opposite directions at the same average speed.

4. The lamination mechanism according to claim 1, characterized in that: The stacking table has a first position and a second position at both ends of a reciprocating stroke, and the coating assembly has a third position and a fourth position at both ends of the reciprocating stroke, the third position is located directly above the first position, and the fourth position is located directly above the second position. When the stacking table receives a negative electrode sheet, the stacking table is in the first position and the coating assembly is in the fourth position. When the stacking table receives a positive electrode sheet, the stacking table is in the second position and the coating assembly is in the third position.

5. The lamination mechanism according to claim 4, characterized in that: The stacking mechanism also includes a battery cell transporting assembly. After the stacking mechanism completes stacking to form a battery cell, the stacking table moves to the first position, the coating assembly moves to the fourth position, and the battery cell transporting assembly moves the battery cell from the stacking table to the side away from the second position, and when the battery cell moves away from the edge of the stacking table, the diaphragm is cut along the edge.

6. The lamination mechanism according to claim 5, characterized in that: When the battery cell transporting assembly moves the battery cell away from the stacking stage assembly to the side away from the second position, the two pressing knife mechanisms close to the battery cell always press the sides of the diaphragm.

7. The lamination mechanism according to claim 6, characterized in that: The coating assembly includes a mounting seat, a transmission roller and a film cutting mechanism. The mounting seat can reciprocate in the horizontal direction. The transmission roller and the film cutting mechanism are both arranged on the mounting seat, and the film cutting mechanism can be raised and lowered on one side of the transmission roller. The transmission roller is used to transmit the diaphragm. When the battery cell moves away from the edge of the stacking table, the mounting seat moves until the film cutting mechanism is above the edge, and the film cutting mechanism descends and cuts the diaphragm along the edge.

8. The lamination mechanism according to claim 1, characterized in that: The first feeding mechanism comprises a first electrode platform and a first handling assembly, and the second feeding mechanism comprises a second electrode platform and a second handling assembly, wherein: The first pole piece platform, the stacking platform and the second pole piece platform are sequentially arranged along the horizontal direction, and the first pole piece platform and the second pole piece platform are respectively arranged on both sides of the stacking platform; The first electrode sheet platform is used to receive the negative electrode sheet and correct the posture of the negative electrode sheet. When the stacking platform moves to the first position, the first transport component places the negative electrode sheet picked up from the first electrode sheet platform on the diaphragm laid on the stacking platform. The second electrode sheet platform is used to receive the positive electrode sheet and correct the posture of the positive electrode sheet. When the stacking platform moves to the second position, the second transport assembly places the positive electrode sheet picked up from the second electrode sheet platform on the diaphragm laid on the stacking platform.

9. The lamination mechanism according to claim 8, characterized in that: The moving distances of the first transport assembly and the second transport assembly are both twice the moving distance of the stacking platform, and the average speeds of the first transport assembly and the second transport assembly are twice the average speed of the stacking platform.

10. The lamination mechanism according to claim 9, characterized in that: The first feeding mechanism also includes a first material table and a first picking component, and the second feeding mechanism also includes a second material table and a second picking component. The first material table is on the side of the first pole piece platform away from the stacking table, and the second material table is on the side of the second pole piece platform away from the stacking table. The first picking component picks up the negative pole piece from the first material table and places it on the first pole piece platform, and the second picking component picks up the negative pole piece from the second material table and places it on the second pole piece platform.

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