Continuous laminator

Abstract

The present application relates to a continuous laminator. The continuous laminator comprises: a separator unwinding mechanism, which is configured to pass a separator through a bonding station, a pickup station and a lamination station in sequence; a bonding mechanism, which is arranged corresponding to the bonding station, and is configured to bond positive electrode plates and negative electrode plates to two sides of the separator passing through the bonding station such that the positive electrode plates and the negative electrode plates are alternately arranged and spaced apart from each other in the lengthwise direction of the separator, the region between the adjacent positive electrode plate and negative electrode plate on the separator being a single-layer region; a lamination table, which is arranged corresponding to the lamination station; and a lamination mechanism, which is arranged corresponding to the pickup station, and is configured to apply force to the single-layer regions of the separator passing through the pickup station, such that the separator is bent in the single-layer regions and stacked on the lamination table in a "Z"-shape.

Description

A continuous lamination machine Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and in particular to a continuous lamination machine. Background Art

[0002] Lithium-ion batteries are high-energy-density batteries widely used in various portable electronic devices and automotive power batteries. Lamination is a crucial step in lithium-ion battery processing. This involves alternately stacking the positive electrode, negative electrode, and separator to form a cell. This process is currently automated in mass production using lamination machines.

[0003] The existing stacking machine first fits the electrode sheet onto the diaphragm, then cuts the diaphragm into a stacking unit consisting of a positive electrode sheet, a diaphragm and a negative electrode sheet, and then transports the stacking unit to a stacking table for stacking. Materials need to be transferred between each process step, the process steps are discontinuous and the process flow is long, resulting in low production efficiency.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a continuous lamination machine that improves the above-mentioned defects in order to address the problem of low production efficiency of the lamination machine in the prior art.

[0006] A continuous laminating machine, comprising:

[0007] Diaphragm unwinding mechanism, used to transport the diaphragm downstream;

[0008] a patch mechanism, arranged downstream of the diaphragm unwinding mechanism, for attaching the positive electrode sheet and the negative electrode sheet to both sides of the diaphragm passing through, so that the positive electrode sheets and the negative electrode sheets are alternately arranged along the length direction of the diaphragm, and the area between adjacent positive electrode sheets and negative electrode sheets on the diaphragm is a single-layer area;

[0009] a lamination platform, arranged downstream of the placement mechanism; and

[0010] The lamination mechanism is arranged between the lamination mechanism and the lamination platform, and is used to apply a force to the single-layer area of ​​the diaphragm passing through, so that the diaphragm is bent at the single-layer area and stacked on the lamination platform.

[0011] In one embodiment, the stacking mechanism includes a first stacking assembly and a second stacking assembly, and the diaphragm passes between the first stacking assembly and the second stacking assembly; the first stacking assembly has a first picking portion, and the second stacking assembly has a second picking portion, and the first picking portion and the second picking portion alternately move from an initial position to the stacking table during movement;

[0012] When the first picking part moves from the initial position to the stacking table, the first picking part picks up a single-layer area of ​​the diaphragm and moves a preset distance in the direction away from the second stacking assembly; when the second picking part moves from the initial position to the stacking table, the second picking part picks up a single-layer area of ​​the diaphragm and moves a preset distance in the direction away from the first stacking assembly.

[0013] In one embodiment, the first stack assembly includes a first track, and the first picking portion is disposed on the first track and can be controlled to move along the first track.

[0014] In one embodiment, the first track is in a closed loop, so that the first picking part can cyclically pass through the initial position and the stacking platform during the movement along the first track.

[0015] In one embodiment, the second stack assembly includes a second track, and the second picking portion is disposed on the second track and can be controlled to move along the second track.

[0016] In one embodiment, the second track is in a closed loop, so that the second picking portion can cyclically pass through the initial position and the stacking platform during the movement along the second track.

[0017] In one embodiment, the first picking portion is a clamping member for clamping and fixing the single-layer region of the diaphragm, or an adsorption member for adsorbing and fixing the single-layer region of the diaphragm.

[0018] In one embodiment, the second picking portion is a clamping member for clamping and fixing the single-layer region of the diaphragm, or an adsorption member for adsorbing and fixing the single-layer region of the diaphragm.

[0019] In one embodiment, the continuous laminating machine further comprises a moving mechanism disposed between the laminating mechanism and the patch mechanism;

[0020] The moving mechanism can controllably drive the passing diaphragm to swing back and forth between the first stack assembly and the second stack assembly, so that the first picking part and the second picking part can alternately pick up the single-layer area of ​​the passing diaphragm.

[0021] In one embodiment, the moving mechanism includes a moving seat, a first clamping roller and a second clamping roller; the moving seat can be moved in a controlled manner, the first clamping roller and the second clamping roller are both rotatably connected to the moving seat around their own axes, and a membrane-penetrating gap is formed between the first clamping roller and the second clamping roller for the diaphragm to pass through.

[0022] In one embodiment, the continuous stacking machine further includes a clamping roller mechanism, which includes a fixed seat, a third clamping roller and a fourth clamping roller. The fixed seat is fixedly arranged between the moving mechanism and the patch mechanism. The third clamping roller and the fourth clamping roller are both rotatably connected to the fixed seat around their own axes, and a conveying gap is formed between the third clamping roller and the fourth clamping roller for the passing diaphragm to pass through.

[0023] In one embodiment, the continuous laminating machine further includes a pressing mechanism disposed between the laminating mechanism and the clamping roller mechanism, and the pressing mechanism presses the diaphragm passing through.

[0024] In one embodiment, the pressing mechanism includes two belt conveyor assemblies, and a pressing gap is formed between the two belt conveyor assemblies for the diaphragm to pass through. The two belt conveyor assemblies jointly press the diaphragm passing through the pressing gap.

[0025] In one embodiment, the belt conveyor assembly includes a driving wheel, a driven wheel, a belt and a pressure wheel, the belt is arranged between the driving wheel and the driven wheel, the driving wheel can rotate around its own axis in a controlled manner, the pressure wheel is rotatably arranged around its own axis between the driving wheel and the driven wheel, and the pressure wheel presses the belt against the diaphragm passing through the pressing gap.

[0026] In one embodiment, the patch mechanism includes a first patch pressing roller and a second patch pressing roller, both rotatable around their own axes, and a patch gap is formed between the first patch pressing roller and the second patch pressing roller for the diaphragm to pass through;

[0027] The continuous stacking machine also includes a first sheet feeding mechanism and a second sheet feeding mechanism. The first sheet feeding mechanism is used to convey the positive electrode sheet to the first patch pressing roller. The first patch pressing roller rotates to drive the positive electrode sheet into the patch gap and attach it to one side of the diaphragm. The second sheet feeding mechanism is used to convey the negative electrode sheet to the second patch pressing roller. The second patch pressing roller rotates to drive the negative electrode sheet into the patch gap and attach it to the other side of the diaphragm.

[0028] In one embodiment, the patch mechanism further includes a first gluing portion, which is arranged corresponding to the first patch pressing roller and is used to apply glue to the positive electrode sheet on the first patch pressing roller.

[0029] In one embodiment, the patch mechanism further includes a second gluing portion, which is arranged corresponding to the second patch pressing roller and is used to apply glue to the negative electrode sheet on the second patch pressing roller.

[0030] In one embodiment, the first patch pressing roller can be controlled to adsorb and fix the positive electrode sheet thereon;

[0031] The second patch pressing roller can controllably adsorb and fix the negative electrode sheet thereon.

[0032] In one embodiment, the first sheet feeding mechanism includes a first unwinding component, a first cutting component and a first conveying component. The first unwinding component is used to unwind and output the positive electrode sheet strip. The first cutting component is arranged downstream of the first unwinding component and is used to cut the positive electrode sheet strip into positive electrode sheets. The first conveying component is arranged between the first cutting component and the first patch pressing roller and is used to convey the positive electrode sheet to the first patch pressing roller.

[0033] In one embodiment, the second sheet feeding mechanism includes a second unwinding assembly, a second cutting assembly and a second conveying assembly. The second unwinding assembly is used to unwind and output the negative electrode sheet strip. The second cutting assembly is arranged downstream of the second unwinding assembly and is used to cut the negative electrode sheet strip into negative electrode sheets. The second conveying assembly is arranged between the second cutting assembly and the second patch pressing roller and is used to convey the negative electrode sheet to the second patch pressing roller.

[0034] In the above-mentioned continuous laminating machine, the diaphragm unwinding mechanism continuously transports the diaphragm downstream, and the diaphragm passes through the laminating mechanism, the laminating mechanism and the laminating table in sequence. The laminating mechanism attaches the positive electrode sheet and the negative electrode sheet to both sides of the diaphragm. The laminating mechanism applies a force to the single-layer area of ​​the diaphragm passing through (that is, between adjacent positive and negative electrode sheets), and under the action of this force, the diaphragm bends at the single-layer area so that the diaphragm is stacked on the laminating table. In this way, in the present application, the laminating, bending and stacking are completed during the diaphragm conveying process without cutting the diaphragm, and the diaphragm does not need to stay at each station, thereby achieving continuous lamination and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic structural diagram of a continuous lamination machine according to an embodiment of the present application;

[0036] FIG2 is a schematic structural diagram of the lamination mechanism of the continuous lamination machine shown in FIG1 ;

[0037] FIG3 is a schematic structural diagram of a patch mechanism of the continuous lamination machine shown in FIG1 ;

[0038] FIG4 is a schematic structural diagram of a first sheet feeding mechanism of the continuous sheet stacking machine shown in FIG1 ;

[0039] FIG5 is a schematic structural diagram of a second sheet feeding mechanism of the continuous sheet stacking machine shown in FIG1 . DETAILED DESCRIPTION

[0040] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0043] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0046] 1 and 2 , an embodiment of the present application provides a continuous laminating machine, including a diaphragm unwinding mechanism 10 , a laminating mechanism 20 , a laminating mechanism 30 and a laminating table (not shown).

[0047] The diaphragm unwinding mechanism 10 is used to transport the diaphragm b1 downstream, so that the diaphragm b1 passes through the patch station a1, the picking station a2 and the stacking station a3 in sequence. The patch mechanism 20 is arranged downstream of the diaphragm unwinding mechanism 10, that is, it is arranged corresponding to the patch station a1. The patch mechanism 20 is used to attach the positive electrode sheet d1 (see Figure 3) and the negative electrode sheet d2 (see Figure 3) to the two sides of the diaphragm b1 passing through the patch station a1, so that the positive electrode sheet d1 and the negative electrode sheet d2 are arranged alternately along the length direction of the diaphragm b1. The area between the adjacent positive electrode sheet d1 and the negative electrode sheet d2 on the diaphragm b1 is a single-layer area (not marked in the figure). The stacking table is arranged downstream of the patch mechanism 20, that is, it is arranged corresponding to the stacking station a3. The stacking mechanism 30 is arranged between the patch mechanism 20 and the stacking table, that is, it is arranged corresponding to the picking station a2. The stacking mechanism 30 is used to apply force to the single-layer area of ​​the diaphragm b1 passing through, so that the diaphragm b1 is bent at the single-layer area and stacked on the stacking table (for example, the diaphragm b1 is bent at the single-layer area and stacked in a "Z" shape on the stacking table).

[0048] In the above-mentioned continuous laminating machine, the diaphragm unwinding mechanism 10 continuously transports the diaphragm b1 downstream, and the diaphragm b1 passes through the patch mechanism 20 of the patch station a1, the laminating mechanism 30 of the pick-up station a2, and the laminating table of the laminating station a3 in sequence. At the patch station a1, the patch mechanism 20 attaches the positive electrode sheet d1 and the negative electrode sheet d2 to both sides of the diaphragm b1. At the pick-up station a2, the laminating mechanism 30 applies a force to the single-layer area of ​​the diaphragm b1 passing through the pick-up station a2 (i.e., between the adjacent positive electrode sheet d1 and negative electrode sheet d2). Under the action of this force, the diaphragm b1 bends in the single-layer area, so that the diaphragm b1 is stacked in a "Z" shape on the laminating table. In this way, in the present application, the patching, bending and "Z"-shaped stacking are completed during the transportation of the diaphragm b1 without cutting the diaphragm b1. The diaphragm b1 does not need to stay at each work station, realizing continuous stacking and greatly improving production efficiency.

[0049] In the embodiment of the present application, the lamination mechanism 30 includes a first lamination assembly 31 and a second lamination assembly 32. The diaphragm b1 passing through the lamination station a3 passes between the first lamination assembly 31 and the second lamination assembly 32. In other words, the first lamination assembly 31 and the second lamination assembly 32 are located on either side of the diaphragm b1 passing through the lamination station a3. The first lamination assembly 31 has a first pickup portion 311, and the second lamination assembly 32 has a second pickup portion 321. The first pickup portion 311 and the second pickup portion 321 alternately move from their initial positions toward the lamination table during movement.

[0050] When the first picking portion 311 or the second picking portion 321 moves to the initial position, it picks up a single-layer region of the diaphragm b1. As the first picking portion 311 moves from the initial position toward the stacking table, it moves the picked-up single-layer region of the diaphragm b1 a predetermined distance away from the second stacking assembly 32, thereby bending the diaphragm b1 at the single-layer region. As the second picking portion 321 moves from the initial position toward the stacking table, it moves the picked-up single-layer region of the diaphragm b1 a predetermined distance away from the first stacking assembly 31, thereby bending the diaphragm b1 at the single-layer region. In this way, through the cooperation of the first picking portion 311 and the second picking portion 321, the diaphragms b1 stacked on the stacking table are all bent at their single-layer regions, forming a "Z"-shaped stacking structure.

[0051] Specifically, in the embodiment shown in FIG2 , after the first pickup unit 311 picks up a single-layer region of the diaphragm b1 at its initial position, it then moves to the lamination station. During this process, the first pickup unit 311 moves downward and leftward (i.e., the first pickup unit 311 moves in a lower-left direction). After the second pickup unit 321 picks up a single-layer region of the diaphragm b1 at its initial position, it then moves to the lamination station a3. During this process, the second pickup unit 321 moves downward and rightward (i.e., the second pickup unit 321 moves in a lower-right direction) from its initial position to the lamination station.

[0052] It should be noted that if the single-layer region of the diaphragm b1 that has currently reached the initial position is picked up and fixed by the first picking portion 311, the second picking portion 321 is used to pick up and fix the next single-layer region of the diaphragm b1 that has reached the initial position. If the single-layer region of the diaphragm b1 that has currently reached the initial position is picked up and fixed by the second picking portion 321, the first picking portion 311 is used to pick up and fix the next single-layer region of the diaphragm b1 that has reached the initial position.

[0053] It should also be noted that the distance between the first picking part 311 and the second picking part 321 that successively pick up two adjacent single-layer areas of the fixed diaphragm is roughly equal to the length of the positive electrode sheet d1 or the negative electrode sheet d2, so that the diaphragm b1 is stacked in a "Z" shape on the stacking table.

[0054] Optionally, the first pickup portion 311 is a clamping member for clamping the single-layer region of the fixed diaphragm b1. In other words, the first pickup portion 311 picks up the single-layer region of the fixed diaphragm b1 by clamping. Of course, in other embodiments, the first pickup portion 311 may also be an adsorption member for adsorbing the single-layer region of the fixed diaphragm b1. In other words, the first pickup portion 311 may also pick up the single-layer region of the fixed diaphragm b1 by adsorption.

[0055] Optionally, the second pickup portion 321 is a clamping member for clamping the single-layer region of the fixed diaphragm b1. In other words, the second pickup portion 321 picks up the single-layer region of the fixed diaphragm b1 by clamping. Of course, in other embodiments, the second pickup portion 321 may also be an adsorption member for adsorbing the single-layer region of the fixed diaphragm b1. In other words, the second pickup portion 321 may also pick up the single-layer region of the fixed diaphragm b1 by adsorption.

[0056] Specifically, in this embodiment, the first lamination assembly 31 includes a first track 313. The first pickup portion 311 is disposed on the first track 313 and is controllably movable along the first track 313, thereby enabling the first pickup portion 311 to move from an initial position to the lamination table. During this movement, the first pickup portion 311 is displaced in a direction away from the second lamination assembly 32. The first track 313 is in a closed loop, enabling the first pickup portion 311 to cyclically pass through the initial position and the lamination table during its movement along the first track 313. In other words, after the first pickup portion 311 moves from the initial position to the lamination table along the first track 313, it releases the single-layer region of the diaphragm b1 and continues to move along the first track 313 back to the initial position, repeating this cycle.

[0057] Specifically, in this embodiment, the second lamination assembly 32 includes a second track 323. The second pickup portion 321 is disposed on the second track 323 and is controllably movable along the second track 323, thereby enabling the second pickup portion 321 to move from an initial position to the lamination table. During this movement, the second pickup portion 321 is displaced a certain distance away from the first lamination assembly 31. The second track 323 is in a closed loop, allowing the second pickup portion 321 to cyclically pass through the initial position and the lamination table during its movement along the second track 323. In other words, after the second pickup portion 321 moves from the initial position to the lamination table along the second track 323, it releases the single-layer region of the diaphragm b1 and continues to move along the second track 323 back to the initial position, repeating this cycle.

[0058] Furthermore, there are multiple first picking parts 311, which are arranged along the first track 313 and can be controlled to move sequentially along the first track 313. There are multiple second picking parts 321, which are arranged along the second track 323 and can be controlled to move sequentially along the second track 323. In this way, the multiple first picking parts 311 and the multiple second picking parts 321 are used to alternately pick up and fix a single layer area of ​​the diaphragm b1 passing through the picking station a2, ensuring that each single layer area of ​​the diaphragm b1 that reaches the initial position can be picked up and fixed by the corresponding first picking part 311 or second picking part 321.

[0059] In an embodiment of the present application, the continuous stacking machine further includes a moving mechanism 40 disposed between the stacking mechanism 30 and the attachment mechanism 20. The moving mechanism 40 can controllably drive the diaphragm b1 passing through to swing back and forth between the first stacking assembly 31 and the second stacking assembly 32, so that the diaphragm b1 approaches the first pickup portion 311 and is picked up and fixed by the first pickup portion 311, or approaches the second pickup portion 321 and is picked up and fixed by the second pickup portion 321. In this way, when the single-layer area of ​​the diaphragm b1 that has currently reached the initial position needs to be picked up by the first pickup portion 311, the moving mechanism 40 drives the diaphragm b1 to swing toward the direction close to the first stacking assembly 31, so that the single-layer area of ​​the diaphragm b1 that has currently reached the initial position is closer to the first pickup portion 311, so that the single-layer area of ​​the diaphragm b1 that has currently reached the initial position can be picked up and fixed by the corresponding first pickup portion 311. When the single-layer area of ​​the diaphragm b1 that has currently reached the initial position needs to be picked up by the second picking part 321, the moving mechanism 40 drives the diaphragm b1 to swing toward the direction close to the second stacking assembly 32, so that the single-layer area of ​​the diaphragm b1 that has currently reached the initial position is closer to the second picking part 321, so that the single-layer area of ​​the diaphragm b1 that has currently reached the initial position can be picked up and fixed by the corresponding second picking part 321.

[0060] Specifically in the embodiment, the moving mechanism 40 includes a moving seat (not shown), a first pinch roller 41, and a second pinch roller 42. The moving seat can move in a controlled manner, and the first pinch roller 41 and the second pinch roller 42 are both rotatably connected to the moving seat around their own axes, so that the moving seat can drive the first pinch roller 41 and the second pinch roller 42 to move. A membrane gap (not shown) is formed between the first pinch roller 41 and the second pinch roller 42 for the diaphragm b1 passing through. In this way, the diaphragm b1 passing through the moving mechanism 40 passes between the first pinch roller 41 and the second pinch roller 42, so that when the moving seat moves, it can drive the diaphragm b1 between the first and second pinch rollers 41 and 42 to swing back and forth between the first and second stacking assemblies 31 and 32. Since the first and second pinch rollers 41 and 42 can both rotate around their own axes, the diaphragm b1 can pass through the membrane gap between the first and second pinch rollers 41 and 42 and be transported downstream.

[0061] It should be noted that a linear drive mechanism such as an air cylinder, an electric cylinder, a linear module, etc. can be used to drive the movable seat to move back and forth, which is not limited here.

[0062] Specifically in the embodiment, the continuous stacking machine also includes a clamping roller mechanism 50 arranged between the patch mechanism 20 and the moving mechanism 40. The clamping roller mechanism 50 includes a fixed seat (not shown), a third clamping roller 51 and a fourth clamping roller 52. The fixed seat is fixedly arranged between the moving mechanism 40 and the patch mechanism 20. The third clamping roller 51 and the fourth clamping roller 52 are both rotatably connected to the fixed seat around their own axes. A conveying gap is formed between the third clamping roller 51 and the fourth clamping roller 52 for the passing diaphragm b1 to pass through. In this way, the diaphragm b1 passing through the patch mechanism 20 passes through the conveying gap between the third clamping roller 51 and the fourth clamping roller 52 and is then conveyed downstream. Since the position of the clamping roller mechanism 50 is fixed, when the diaphragm b1 downstream of the clamping roller mechanism 50 swings back and forth under the drive of the moving mechanism 40, the diaphragm b1 upstream of the clamping roller mechanism 50 is not affected by the swing, thereby preventing the diaphragm b1 passing through the patch mechanism 20 from swinging along, which is beneficial to ensuring the quality of the patch. Since the third nip roller 51 and the fourth nip roller 52 are both rotatable around their own axes, the membrane b1 can pass through the conveying gap between the third nip roller 51 and the fourth nip roller 52 and be conveyed downstream.

[0063] Referring to Figures 1 and 3, in an embodiment of the present application, the patch mechanism 20 includes a first patch roller 21 and a second patch roller 22, both of which are rotatable around their own axes. A patch gap (not shown) is formed between the first patch roller 21 and the second patch roller 22 for the diaphragm b1 to pass through. The continuous stacking machine also includes a first sheet feeding mechanism 70 and a second sheet feeding mechanism 80. The first sheet feeding mechanism 70 is used to convey the positive electrode sheet d1 onto the first patch roller 21. The rotation of the first patch roller 21 drives the positive electrode sheet d1 into the patch gap and attaches it to one side of the diaphragm b1. The second sheet feeding mechanism 80 is used to convey the negative electrode sheet d2 onto the second patch roller 22. The rotation of the second patch roller 22 drives the negative electrode sheet d2 into the patch gap and attaches it to the other side of the diaphragm b1.

[0064] In this way, the diaphragm b1 passes through the patch gap between the first patch roller 21 and the second patch roller 22 and is transported downstream. During the process of diaphragm b1 being transported downstream, when it is necessary to attach the positive electrode sheet d1 to one side of the diaphragm b1, the first sheet feeding mechanism 70 feeds the positive electrode sheet d1 onto the first patch roller 21. The positive electrode sheet d1 gradually enters the patch gap with the first patch roller 21 and is attached to one side of the diaphragm b1 through the joint extrusion of the first patch roller 21 and the second patch roller 22 within the patch gap. When it is necessary to attach the negative electrode sheet d2 to the other side of the diaphragm b1, the second sheet feeding mechanism 80 feeds the negative electrode sheet d2 onto the second patch roller 22. The negative electrode sheet d2 gradually enters the patch gap with the second patch roller 22 and is attached to the other side of the diaphragm b1 through the joint extrusion of the first patch roller 21 and the second patch roller 22 within the patch gap.

[0065] Specifically in the embodiment, the patch mechanism 20 further includes a first gluing unit 91 and a second gluing unit 92. The first gluing unit 91 is arranged corresponding to the first patch roller 21 and is used to apply glue to the positive electrode sheet d1 on the first patch roller 21, so that when the positive electrode sheet d1 follows the first patch roller 21 into the patch gap, the positive electrode sheet d1 can be adhered to one side of the diaphragm b1 under the joint compression of the first patch roller 21 and the second patch roller 22.

[0066] The second gluing portion 92 is arranged corresponding to the second patch pressing roller 22, and is used to apply glue to the negative electrode sheet d2 on the second patch pressing roller 22, so that when the negative electrode sheet d2 follows the second patch pressing roller 22 into the patch gap, the negative electrode sheet d2 can be adhered to the other side of the diaphragm b1 under the joint extrusion of the first patch pressing roller 21 and the second patch pressing roller 22.

[0067] Specifically in the embodiment, the first patch roller 21 can be an adsorption roller that can controllably adsorb and fix the positive electrode sheet d1 thereon. Thus, when the first sheet feeding mechanism 70 conveys the positive electrode sheet d1 onto the first patch roller 21, the first patch roller 21 adsorbs and fixes the positive electrode sheet d1, preventing the positive electrode sheet d1 from shifting or falling off the first patch roller 21. When the positive electrode sheet d1 follows the first patch roller 21 into the patch gap and adheres to the diaphragm b1, the first patch roller 21 releases its adsorption of the positive electrode sheet d1, allowing the positive electrode sheet d1 to be conveyed downstream along with the diaphragm b1.

[0068] The second patch roller 22 can be a suction roller that can controllably absorb and secure the negative electrode sheet d2 thereon. As the second sheet feeding mechanism 80 delivers the negative electrode sheet d2 to the second patch roller 22, the second patch roller 22 absorbs and secures the negative electrode sheet d2, preventing the negative electrode sheet d2 from shifting or falling from the second patch roller 22. When the negative electrode sheet d2 follows the second patch roller 22 into the patch gap and adheres to the separator b1, the second patch roller 22 releases its suction on the negative electrode sheet d2, allowing it to be transported downstream along with the separator b1.

[0069] Specifically in the embodiment, the continuous laminating machine further includes a pressing mechanism 60 disposed between the laminating mechanism 20 and the clamping roller mechanism 50. The pressing mechanism 60 presses the passing separator b1 so that the positive electrode sheet d1 and the negative electrode sheet d2 are more reliably adhered to both sides of the separator b1.

[0070] Furthermore, the pressing mechanism 60 includes two belt conveyor assemblies 61, which form a pressing gap between the two belt conveyor assemblies 61 for the separator b1 to pass through. The two belt conveyor assemblies 61 jointly press the separator b1 passing through the pressing gap, thereby more reliably adhering the positive electrode sheet d1 and the negative electrode sheet d2 to both sides of the separator b1.

[0071] Furthermore, the belt conveyor assembly 61 includes a driving pulley 611, a driven pulley 612, and a belt 613. The belt 613 is disposed between the driving pulley 611 and the driven pulley 612. The driving pulley 611 can be controlled to rotate about its axis, thereby driving the driven pulley 612 via the belt 613. The belt 613 and the diaphragm b1 in contact therewith move synchronously downstream, so that the diaphragm b1 passing through the pressing gap is pressed together by the two belts 613.

[0072] Furthermore, the belt conveyor assembly 61 includes a pressure roller 614. The pressure roller 614 is rotatably disposed about its axis between the driving roller 611 and the driven roller 612. The pressure roller 614 presses the belt 613 against the diaphragm b1 passing through the compression gap. Thus, the two belts 613 on either side of the compression gap are pressed against the diaphragm b1 by the pressure of the two pressure rollers 614.

[0073] Referring to Figures 1 and 4, in an embodiment of the present application, the first sheet feeding mechanism 70 includes a first unwinding assembly 71, a first cutting assembly 72, and a first conveying assembly (not shown). The first unwinding assembly 71 is used to unwind and output the positive electrode sheet strip c1. The first cutting assembly 72 is arranged downstream of the first unwinding assembly 71, and is used to cut the positive electrode sheet strip c1 to form a positive electrode sheet d1. The first conveying assembly is arranged between the first cutting assembly 72 and the first patch pressing roller 21, and is used to convey the positive electrode sheet d1 to the first patch pressing roller 21.

[0074] It should be noted that the specific structure of the first unwinding assembly 71 is not limited here, as long as it can unwind and output the positive electrode sheet c1. The structure of the first cutting assembly 72 is not limited here, as long as it can cut the positive electrode sheet c1 passing through and form the positive electrode sheet d1.

[0075] Specifically, in this embodiment, the first conveyor assembly includes a first belt conveyor structure 73, a first transfer roller 74, and a second belt conveyor structure 75. The first belt conveyor structure 73 is arranged between the first cutting assembly 72 and the first transfer roller 74, and is used to convey the positive electrode sheet d1 cut by the first cutting assembly 72 to the first transfer roller 74. The first transfer roller 74 is rotatably arranged about its own axis between the first belt conveyor structure 73 and the second belt conveyor structure 75, and is used to convey the positive electrode sheet d1 to the second belt conveyor structure 75 during rotation. The second belt conveyor structure 75 is arranged between the first transfer roller 74 and the first patch pressing roller 21, and is used to convey the positive electrode sheet d1 to the first patch pressing roller 21.

[0076] Optionally, the first transfer roller 74 can be controlled to adsorb and fix the positive electrode sheet d1 , so that when the first transfer roller 74 rotates, it can drive the positive electrode sheet d1 output by the first belt conveyor structure 73 to be conveyed to the second belt conveyor structure 75 .

[0077] It should be noted that the specific structure of the first belt conveyor structure 73 is not limited herein, as long as it can receive the positive electrode sheet d1 cut by the first cutting assembly 72 and convey the positive electrode sheet d1 to the first transfer roller 74. The specific structure of the second belt conveyor structure 75 is not limited herein, as long as it can receive the positive electrode sheet d1 conveyed by the first transfer roller 74 and convey the positive electrode sheet d1 to the first patch pressing roller 21.

[0078] Specifically, in this embodiment, the first film feeding mechanism 70 further includes a first rejecting assembly (not shown) and a first defective product collection box 76. When a positive electrode sheet d1 passing between the first belt conveyor structure 73 and the first transfer roller 74 is detected as defective, the first rejecting assembly is used to discharge the defective positive electrode sheet d1 into the first defective product collection box 76.

[0079] Referring to Figures 1 to 5, in an embodiment of the present application, the second sheet feeding mechanism 80 includes a second unwinding assembly 81, a second cutting assembly 82, and a second conveying assembly (not shown). The second unwinding assembly 81 is used to unwind and output the negative electrode sheet strip c2. The second cutting assembly 82 is arranged downstream of the second unwinding assembly 81, and is used to cut the negative electrode sheet strip c2 to form a negative electrode sheet d2. The second conveying assembly is arranged between the second cutting assembly 82 and the second patch pressing roller 22, and is used to convey the negative electrode sheet d2 to the second patch pressing roller 22.

[0080] It should be noted that the specific structure of the second unwinding assembly 81 is not limited here, as long as it can unwind and output the negative electrode sheet c2. The structure of the second cutting assembly 82 is not limited here, as long as it can cut the negative electrode sheet c2 passing through and form the negative electrode sheet d2.

[0081] Specifically, in this embodiment, the second conveyor assembly includes a third belt conveyor structure 83, a second transfer roller 84, and a fourth belt conveyor structure 85. The third belt conveyor structure 83 is arranged between the second cutting assembly 82 and the second transfer roller 84, and is used to convey the negative electrode sheet d2 cut by the second cutting assembly 82 to the second transfer roller 84. The second transfer roller 84 is rotatably arranged about its own axis between the third belt conveyor structure 83 and the fourth belt conveyor structure 85, and is used to convey the negative electrode sheet d2 to the fourth belt conveyor structure 85 during rotation. The fourth belt conveyor structure 85 is arranged between the second transfer roller 84 and the second patch pressing roller 22, and is used to convey the negative electrode sheet d2 to the second patch pressing roller 22.

[0082] Optionally, the second transfer roller 84 can be controlled to adsorb and fix the negative electrode sheet d2, so that when the second transfer roller 84 rotates, it can drive the negative electrode sheet d2 output by the third belt conveyor structure 83 to be conveyed to the fourth belt conveyor structure 85.

[0083] It should be noted that the specific structure of the third belt conveyor structure 83 is not limited herein, as long as it can receive the negative electrode sheet d2 cut by the second cutting assembly 82 and convey the negative electrode sheet d2 to the second transfer roller 84. The specific structure of the fourth belt conveyor structure 85 is not limited herein, as long as it can receive the negative electrode sheet d2 conveyed by the second transfer roller 84 and convey the negative electrode sheet d2 to the second patch pressing roller 22.

[0084] Specifically, in this embodiment, the second film feeding mechanism 80 further includes a second reject assembly (not shown) and a second defective product collection box 86. When a negative electrode sheet d2 passing between the third belt conveyor structure 83 and the second transfer roller 84 is detected as defective, the second reject assembly is configured to discharge the defective negative electrode sheet d2 into the second defective product collection box 86.

[0085] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A continuous lamination machine, characterized in that: include: A diaphragm unwinding mechanism for conveying the diaphragm downstream; A patch mechanism, arranged downstream of the diaphragm unwinding mechanism, for respectively attaching the positive electrode sheet and the negative electrode sheet to both sides of the diaphragm passing through, so that the positive electrode sheet and the negative electrode sheet are alternately arranged along the length direction of the diaphragm, and the area between the adjacent positive electrode sheet and the negative electrode sheet on the diaphragm is a single-layer area; A lamination platform, arranged downstream of the lamination mechanism; and The lamination mechanism is arranged between the lamination mechanism and the lamination platform, and is used to apply a force to the single-layer area of ​​the diaphragm passing through, so that the diaphragm is bent at the single-layer area and stacked on the lamination platform.

2. The continuous lamination machine according to claim 1, characterized in that: The stacking mechanism comprises a first stacking assembly and a second stacking assembly, and the diaphragm passes through the first stacking assembly and the second stacking assembly; the first stacking assembly has a first picking portion, and the second stacking assembly has a second picking portion, and the first picking portion and the second picking portion move alternately from an initial position to the stacking platform during the movement; When the first picking part moves from the initial position to the stacking table, the first picking part picks up a single-layer area of ​​the diaphragm and moves a preset distance in a direction away from the second stacking assembly; when the second picking part moves from the initial position to the stacking table, the second picking part picks up a single-layer area of ​​the diaphragm and moves a preset distance in a direction away from the first stacking assembly.

3. The continuous lamination machine according to claim 2, characterized in that: The first stack assembly includes a first track, and the first picking portion is disposed on the first track and can be controlled to move along the first track.

4. The continuous lamination machine according to claim 3, characterized in that: The first track is in a closed loop shape, so that the first picking part can cyclically pass through the initial position and the stacking platform during the movement along the first track.

5. The continuous lamination machine according to claim 2, characterized in that: The second stack assembly includes a second track, and the second picking portion is disposed on the second track and can be controlled to move along the second track.

6. The continuous lamination machine according to claim 5, characterized in that: The second track is in a closed loop shape, so that the second picking part can cyclically pass through the initial position and the stacking platform during the movement along the second track.

7. The continuous lamination machine according to claim 2, characterized in that: The first picking portion is a clamping member for clamping and fixing the single-layer region of the diaphragm, or is an adsorption member for adsorbing and fixing the single-layer region of the diaphragm.

8. The continuous lamination machine according to claim 2, characterized in that: The second picking-up portion is a clamping member for clamping and fixing the single-layer region of the diaphragm, or is an adsorbing member for adsorbing and fixing the single-layer region of the diaphragm.

9. The continuous lamination machine according to any one of claims 2 to 8, characterized in that: The continuous lamination machine further comprises a moving mechanism disposed between the lamination mechanism and the attachment mechanism; The moving mechanism can controllably drive the passing diaphragm to swing back and forth between the first stack assembly and the second stack assembly, so that the first picking part and the second picking part can alternately pick up the single-layer area of ​​the passing diaphragm.

10. The continuous lamination machine according to claim 9, characterized in that: The moving mechanism includes a moving seat, a first clamping roller and a second clamping roller; the moving seat can be moved in a controlled manner, the first clamping roller and the second clamping roller are both rotatably connected to the moving seat around their own axes, and a membrane-penetrating gap is formed between the first clamping roller and the second clamping roller for the diaphragm to pass through.

11. The continuous lamination machine according to claim 9, characterized in that: The continuous stacking machine also includes a clamping roller mechanism, which includes a fixed seat, a third clamping roller and a fourth clamping roller. The fixed seat is fixedly arranged between the moving mechanism and the patch mechanism. The third clamping roller and the fourth clamping roller are both rotatably connected to the fixed seat around their own axes, and a conveying gap is formed between the third clamping roller and the fourth clamping roller for the passing diaphragm to pass through.

12. The continuous lamination machine according to claim 11, characterized in that: The continuous laminating machine further comprises a pressing mechanism arranged between the laminating mechanism and the clamping roller mechanism, and the pressing mechanism presses the diaphragm passing through.

13. The continuous lamination machine according to claim 12, characterized in that: The pressing mechanism comprises two belt conveying assemblies, a pressing gap is formed between the two belt conveying assemblies for the diaphragm to pass through, and the two belt conveying assemblies jointly press the diaphragm passing through the pressing gap.

14. The continuous lamination machine according to claim 13, characterized in that: The belt conveyor assembly includes a driving wheel, a driven wheel, a belt and a pressure wheel, the belt is arranged between the driving wheel and the driven wheel, the driving wheel can rotate around its own axis in a controlled manner, the pressure wheel is rotatably arranged between the driving wheel and the driven wheel around its own axis, and the pressure wheel presses the belt against the diaphragm passing through the pressing gap.

15. The continuous lamination machine according to claim 1, characterized in that: The patch mechanism comprises a first patch pressing roller and a second patch pressing roller, both of which are rotatable around their own axes, and a patch gap is formed between the first patch pressing roller and the second patch pressing roller for the diaphragm to pass through; The continuous stacking machine also includes a first sheet feeding mechanism and a second sheet feeding mechanism. The first sheet feeding mechanism is used to convey the positive electrode sheet to the first patch pressing roller. The first patch pressing roller rotates to drive the positive electrode sheet into the patch gap and adheres to one side of the diaphragm. The second sheet feeding mechanism is used to convey the negative electrode sheet to the second patch pressing roller. The second patch pressing roller rotates to drive the negative electrode sheet into the patch gap and adheres to the other side of the diaphragm.

16. The continuous lamination machine according to claim 15, characterized in that: The patch mechanism further includes a first glue coating unit, which is arranged corresponding to the first patch pressing roller and is used for coating glue on the positive electrode sheet on the first patch pressing roller.

17. The continuous lamination machine according to claim 15, characterized in that: The patch mechanism further includes a second glue coating unit, which is arranged corresponding to the second patch pressing roller and is used for coating glue on the negative electrode sheet on the second patch pressing roller.

18. The continuous lamination machine according to claim 15, characterized in that: The first patch pressing roller can controllably adsorb and fix the positive electrode sheet thereon; The second patch pressing roller can be controlled to adsorb and fix the negative electrode sheet thereon.

19. The continuous lamination machine according to claim 15, characterized in that: The first sheet feeding mechanism includes a first unwinding component, a first cutting component and a first conveying component. The first unwinding component is used to unwind and output the positive electrode sheet strip. The first cutting component is arranged downstream of the first unwinding component and is used to cut the positive electrode sheet strip into positive electrode sheets. The first conveying component is arranged between the first cutting component and the first patch pressing roller and is used to convey the positive electrode sheet to the first patch pressing roller.

20. The continuous lamination machine according to claim 15, characterized in that: The second sheet feeding mechanism includes a second unwinding assembly, a second cutting assembly and a second conveying assembly. The second unwinding assembly is used to unwind and output the negative electrode sheet strip. The second cutting assembly is arranged downstream of the second unwinding assembly and is used to cut the negative electrode sheet strip into negative electrode sheets. The second conveying assembly is arranged between the second cutting assembly and the second patch pressing roller and is used to convey the negative electrode sheet to the second patch pressing roller.

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