Lamination method, lamination device and lamination equipment

Abstract

The invention relates to a lamination method, a lamination device and lamination equipment, during lamination, a plurality of diaphragm material belts are jointly guided to a lamination table, and a plurality of pole pieces can be simultaneously inserted between the plurality of diaphragm material belts due to the fact that one pole piece can be inserted between every two adjacent diaphragm material belts. And in the process of driving the plurality of diaphragm material belts to be laid on the lamination table in a Z shape, the pole pieces are inserted between two adjacent layers of diaphragm material belts every time the plurality of diaphragm material belts are bent until the layer number requirement of the battery cell is met. Due to the fact that the multiple pole pieces can be stacked on the lamination table when the multiple diaphragm material belts are bent once, the lamination frequency of the pole pieces and the swing frequency of the diaphragm material belts are remarkably reduced on the premise that the number of layers of the battery cells is certain, and the lamination efficiency can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a lamination method, a lamination device and a lamination equipment. Background Art

[0002] During the production and processing of lithium batteries, a lamination process is typically required to prepare battery cells. Currently, Z-shaped lamination is the most common method used for battery cell preparation. During lamination, the diaphragm strip is driven by a swing roller to swing back and forth, thereby achieving a Z-shaped laying. Furthermore, with each swing of the diaphragm strip, a robot or other transfer device stacks a pole piece on top of the diaphragm strip until the number of pole pieces meets the battery cell requirements. Because a single battery cell contains a large number of pole pieces, the swinging of the diaphragm strip and the lamination process must be repeated multiple times, resulting in low lamination efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a lamination method, a lamination device and a lamination equipment that can improve the lamination efficiency in order to address the above problems.

[0004] A lamination method, comprising the steps of:

[0005] S10, guiding the plurality of diaphragm strips together to a lamination table and fixing them;

[0006] S20, inserting a pole piece between two adjacent layers of the diaphragm strips, and pressing the plurality of diaphragm strips and the pole pieces between the diaphragm strips onto the lamination table;

[0007] S30, driving the plurality of diaphragm strips to be laid in a Z shape on the lamination table, and inserting the pole piece between two adjacent layers of the diaphragm strips each time the plurality of diaphragm strips are bent.

[0008] In one embodiment, in steps S20 and S30, the step of inserting the electrode sheet between two adjacent layers of the diaphragm material strips includes: simultaneously obtaining a plurality of alternating positive electrode sheets and negative electrode sheets, and simultaneously inserting the positive electrode sheet and the negative electrode sheet between each two adjacent layers of the diaphragm material strips.

[0009] In one embodiment, in step S30, the step of driving the plurality of diaphragm strips to be laid in a Z-shape on the stacking table includes: driving the stacking table to rotate back and forth around a rotation axis to drive the plurality of diaphragm strips to swing back and forth relative to the stacking table.

[0010] In one embodiment, the number of pole pieces inserted into the diaphragm strip in step S30 is one more than the number of pole pieces inserted into the diaphragm strip in step S20.

[0011] A lamination device comprises a lamination table mechanism, a diaphragm guide mechanism and a drive mechanism; the lamination table mechanism comprises a lamination table; the diaphragm guide mechanism comprises a plurality of guide members arranged in parallel; the drive mechanism is in transmission connection with at least one of the lamination table mechanism and the diaphragm guide mechanism, and can drive the lamination table and the diaphragm guide mechanism to swing back and forth relative to each other.

[0012] In one embodiment, the stacking platform mechanism further includes a lifting assembly, and the stacking platform is disposed at a lifting end of the lifting assembly.

[0013] In one embodiment, the stacking platform mechanism further includes a first pressing assembly, a second pressing assembly, a third pressing assembly and a fourth pressing assembly, wherein the first pressing assembly and the second pressing assembly are distributed on one side of the width direction of the stacking platform, and the third pressing assembly and the fourth pressing assembly are distributed on the other side of the width direction of the stacking platform.

[0014] In one embodiment, the diaphragm guide mechanism further includes a mounting bracket, the guide members are mounted on the mounting bracket, and the distance between the guide members is adjustable.

[0015] In one embodiment, the diaphragm guide mechanism further includes a drive assembly, and each of the guide members is in transmission connection with the drive assembly and can move along the mounting bracket under the drive of the drive assembly.

[0016] In one embodiment, the driving mechanism includes a rotating end capable of reciprocatingly rotating around a rotating axis, and the stacking platform mechanism is disposed at the rotating end of the driving mechanism.

[0017] In one embodiment, two stacking platform mechanisms are provided, and the two stacking platform mechanisms are spaced apart along the circumference of the rotating shaft.

[0018] In one embodiment, the plurality of guide members can respectively guide the plurality of diaphragm strips to the stacking table; the plurality of diaphragm strips guided by the plurality of guide members can swing back and forth relative to the stacking table under the drive of the driving mechanism so as to be laid in a Z shape on the stacking table.

[0019] A lamination device comprises a diaphragm unwinding device, a pole piece transfer device and a lamination device as described in any one of the above preferred embodiments.

[0020] In the above-mentioned lamination method, lamination device and lamination equipment, multiple diaphragm strips are first guided to the lamination table together during lamination. Since one electrode can be inserted between two adjacent diaphragm strips, multiple electrode strips can be inserted simultaneously between multiple diaphragm strips. In the process of driving the multiple diaphragm strips to be laid in a Z-shape on the lamination table, each time the multiple diaphragm strips are bent, an electrode is inserted between two adjacent layers of diaphragm strips until the number of layers required by the battery cell is met. Since multiple electrode strips can be stacked on the lamination table each time the multiple diaphragm strips are bent, under the premise of a certain number of battery cell layers, the number of times the electrode strips are stacked and the number of times the diaphragm strips swing will be significantly reduced, thereby significantly improving the lamination efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 Schematic diagram of a lamination process according to an embodiment of the present invention;

[0023] Figure 2 A simplified schematic diagram of the structure of a lamination device in one embodiment of the present invention;

[0024] Figure 3 for Figure 2 A schematic structural diagram of the stacking table mechanism in the stacking device shown;

[0025] Figure 4 for Figure 2 Schematic diagram of scenes of the stacking device in different working states.

[0026] Description of Reference Numerals

[0027] 100. Lamination device; 200. Diaphragm material strip; 300. Diaphragm material strip; 110. Lamination table mechanism; 120. Diaphragm guide mechanism; 130. Drive mechanism; 111. Lamination table; 112. Lifting assembly; 113. First pressing assembly; 114. Second pressing assembly; 115. Third pressing assembly; 116. Fourth pressing assembly; 121. Guide member; 122. Mounting bracket. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] 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.

[0034] See also Figure 1 and Figure 2 The present invention provides a lamination method, a lamination device 100 and a lamination equipment (not shown). The lamination equipment can be used to implement the lamination method. The lamination equipment includes the lamination device 100. The state change of the lamination device 100 when implementing the lamination method is as follows: Figure 4 As shown. Of course, the above lamination method can also be implemented with the help of other devices. Among them, the lamination method in one embodiment of the present invention includes steps S10 to S30:

[0035] In step S10 , the plurality of diaphragm strips 200 are collectively guided to the lamination table 111 and fixed.

[0036] The stacking table 111 has a bearing surface capable of bearing the pole piece 300 and the diaphragm material strip 200. The edge of the stacking table 111 is generally also provided with a pressure plate, a pressure needle and other pressing components for pressing the diaphragm material strip 200 on the bearing surface of the stacking table 111, thereby fixing the diaphragm material strip 200. Specifically, a plurality of diaphragm material strips 200 can be respectively guided to the stacking table 111 by a plurality of swing rollers arranged in parallel, so that the plurality of diaphragm material strips 200 are arranged in parallel in the thickness direction. Moreover, the edges of the plurality of diaphragm material strips 200 are aligned with each other. At this time, the corresponding scene is as follows Figure 4 As shown in (a).

[0037] In step S20 , the electrode pieces 300 are inserted between two adjacent layers of the diaphragm strips 200 , and the plurality of diaphragm strips 200 and the electrode pieces 300 between the diaphragm strips 200 are pressed onto the lamination table 111 .

[0038] Since a pole piece 300 can be inserted between each two adjacent layers of diaphragm strips 200, multiple pole pieces 300 can be inserted between multiple diaphragm strips 200. For example, if eight diaphragm strips 200 are simultaneously introduced to the lamination table 111, a maximum of seven pole pieces 300 can be inserted between the diaphragm strips 200, and the diaphragm strips 200 separate two adjacent pole pieces 300. It should be noted that among the multiple pole pieces 300 inserted between the diaphragm strips 200, the polarity of adjacent pole pieces 300 is opposite, that is, the positive and negative pole pieces are arranged alternately.

[0039] For multiple electrode sheets 300, the sheets can be taken out one by one and inserted one by one between each two adjacent diaphragm strips 200, or the sheets can be taken out at one time and inserted simultaneously between each two adjacent diaphragm strips 200. In order to improve the stacking efficiency, the number of sheet taking and insertion operations is reduced. Specifically, in one embodiment, the step of inserting the electrode sheet 300 between two adjacent layers of diaphragm strips 200 is: simultaneously obtain a plurality of alternating positive electrode sheets and negative electrode sheets, and simultaneously insert the positive electrode sheets and negative electrode sheets between each two adjacent layers of diaphragm strips 200. Therefore, only one sheet taking and insertion operation needs to be performed to transfer multiple electrode sheets 300 to the stacking table 111.

[0040] After inserting the plurality of pole pieces 300 between the plurality of diaphragm strips 200, the diaphragm strips 200 can be driven to swing forward relative to the lamination table 111 so that the plurality of diaphragm strips 200 gradually approach the bearing surface of the lamination table 111 until the plurality of diaphragm strips 200 and the pole pieces 300 between the diaphragm strips 200 are in contact with the lamination table 111. Then, a pressing assembly can be used to press the plurality of diaphragm strips 200 against the lamination table 111 to complete the first lamination operation. At this time, the corresponding scene is Figure 4 (a) Switch to Figure 4 It should be noted that the above-mentioned forward direction and the reverse direction described later do not specifically refer to the swinging direction of the diaphragm material strip 200, but are relative directions. If the forward direction refers to swinging to the right, the reverse direction refers to swinging to the left.

[0041] The spacing between the multiple diaphragm strips 200 is adjustable. Before inserting the pole piece 300, the spacing between the diaphragm strips 200 can be increased to facilitate inserting the pole piece 300 between two adjacent diaphragm strips 200. During the process of driving the multiple diaphragm strips 200 and the pole piece 300 between the diaphragm strips 200 to fit the lamination table 111, the spacing between the diaphragm strips 200 can be decreased to better clamp the pole piece 300 between the diaphragm strips 200.

[0042] In step S30 , the plurality of membrane strips 200 are driven to be laid in a Z-shape on the lamination table 111 , and a pole piece 300 is inserted between two adjacent layers of the membrane strips 200 each time the plurality of membrane strips 200 are bent.

[0043] After the first lamination operation is completed, the second lamination operation can be started. Specifically, the plurality of diaphragm strips 200 can be first caused to swing in the opposite direction relative to the lamination table 111 so as to achieve the first bending of the plurality of diaphragm strips 200. At this time, the corresponding scene is Figure 4 (b) Switch to Figure 4As shown in (c) in the figure, multiple electrode pieces 300 can then be inserted into the gaps between the multiple membrane strips 200. It should be noted that since the membrane strips 200 are already present on the lamination table 111 at this point, the maximum number of electrode pieces 300 that can be inserted between the membrane strips 200 in the second lamination operation will be one more than the maximum number of electrode pieces 300 that can be inserted in the first lamination operation.

[0044] Similarly, in order to improve the stacking efficiency and reduce the number of sheet removal and insertion operations, specifically, the step of inserting the electrode sheet 300 between two adjacent layers of separator strips 200 in step S30 is as follows: simultaneously obtain a plurality of alternating positive and negative electrode sheets, and simultaneously insert the positive and negative electrode sheets between each two adjacent layers of separator strips 200.

[0045] Furthermore, after inserting the plurality of pole pieces 300 between the plurality of diaphragm strips 200, the diaphragm strips 200 can be driven to continue to swing in the opposite direction relative to the lamination platform 111 until the plurality of diaphragm strips 200 and the pole pieces 300 between the diaphragm strips 200 are in contact with the lamination platform 111. Then, the plurality of diaphragm strips 200 are pressed against the lamination platform 111 using a pressing assembly to complete the second lamination operation. At this time, the corresponding scene is Figure 4 (c) Switch to Figure 4 As shown in (d).

[0046] After the second lamination operation is completed, the plurality of diaphragm strips 200 can be driven to swing forward relative to the lamination table 111 again to achieve the second bending of the plurality of diaphragm strips 200. At this time, the corresponding scene is cut back to the following example. Figure 4 As shown in (a), the third stacking operation can begin. The third stacking process is the same as the first, and the fourth stacking process is the same as the second. This process is repeated until the required number of electrode sheets 300 on the stacking table 111 is reached, completing the stacking of a single cell. The multiple separator strips 200 laid on the stacking table 111 are bent multiple times and folded into a "Z" shape.

[0047] In the traditional Z-shaped lamination process, generally only one diaphragm strip 200 is guided to the lamination table 111. Therefore, each time the diaphragm strip 200 is bent, only one electrode piece 300 can be placed on the lamination table 111, resulting in low efficiency. In the lamination method of the present application, multiple diaphragm strips 200 are guided to the lamination table 111 together. Therefore, in the process of driving the multiple diaphragm strips 200 to be laid in a Z-shape on the lamination table 111, each time the multiple diaphragm strips 200 are bent, multiple electrode pieces 300 can be stacked on the lamination table 111. Therefore, under the premise of a certain number of battery cell layers, the number of times the electrode pieces 300 are stacked and the number of times the diaphragm strips 200 swing are significantly reduced, thereby significantly improving the lamination efficiency.

[0048] In addition, in one embodiment, in the above-mentioned step S30, the step of driving the multiple diaphragm strips 200 to be laid in a Z shape on the stacking table 111 includes: driving the stacking table 111 to rotate back and forth around the rotation axis to drive the multiple diaphragm strips 200 to swing back and forth relative to the stacking table 111.

[0049] The reciprocating rotation of the laminating table 111 allows the plurality of diaphragm strips 200 to swing back and forth relative to the laminating table 111 while maintaining their positions. Therefore, the plurality of diaphragm strips 200 do not swing widely during the lamination process, thereby preventing the diaphragm strips 200 from vigorous shaking. This prevents the plurality of diaphragm strips 200 from becoming entangled with each other and maintains good alignment.

[0050] Of course, in other embodiments, the stacking platform 111 may be kept in a fixed position, while driving the plurality of diaphragm strips to move back and forth along an arc path so as to swing back and forth relative to the stacking platform 111 .

[0051] The lamination equipment also includes a membrane unwinding device (not shown) and a pole piece transfer device (not shown). The membrane unwinding device is used to unwind the membrane strip 200; the pole piece transfer device can be a lamination robot that can grab the pole piece 300 and transfer it to the lamination device 100. The membrane unwinding device can generally unwind multiple membrane strips 200 simultaneously, and multiple membrane strips 200 are arranged side by side. The pole piece transfer device can generally grab multiple pole pieces 300 simultaneously.

[0052] In addition, the above lamination equipment generally includes a correction device for correcting the deviation of the diaphragm material strip 200 and the pole piece 300. For the lamination equipment with cutting and lamination, it generally also includes a slicing device to cut the pole piece strip into pole pieces 300.

[0053] See also Figure 2 and Figure 3 In one embodiment of the present invention, a lamination device 100 includes a lamination table mechanism 110 , a diaphragm guide mechanism 120 and a driving mechanism 130 .

[0054] The lamination platform mechanism 110 includes a lamination platform 111. The lamination platform 111 is typically a plate-like structure formed from a material with high mechanical strength, such as metal, and can be rectangular. The lamination platform 111 has a support surface for supporting the electrode sheets 300 and the diaphragm strip 200. Furthermore, the lamination platform mechanism 110 is capable of pressing the electrode sheets 300 and the diaphragm strip 200 against the support surface of the lamination platform 111.

[0055] Specifically in this embodiment, the stacking platform mechanism 110 also includes a first pressing component 113, a second pressing component 114, a third pressing component 115 and a fourth pressing component 116. The first pressing component 113 and the second pressing component 114 are distributed on one side of the stacking platform 111 in the width direction, and the third pressing component 115 and the fourth pressing component 116 are distributed on the other side of the stacking platform 111 in the width direction.

[0056] The first pressing assembly 113, the second pressing assembly 114, the third pressing assembly 115, and the fourth pressing assembly 116 are driven by separate driving members, and each has a pressing state and an avoidance state. When in the pressing state, the pole piece 300 and the diaphragm material strip 200 can be pressed against the bearing surface; when in the avoidance state, they are moved outside the range of the lamination table 111. Specifically, the first pressing assembly 113, the second pressing assembly 114, the third pressing assembly 115, and the fourth pressing assembly 116 all include a pressing sheet or a pressing needle that plays a pressing role, and the pressing sheet or the pressing needle can be moved in both the vertical and horizontal directions under the drive of the corresponding driving member. When switched to the pressing state, the pressing sheet or the pressing needle first moves horizontally onto the lamination table 111 and then moves downward until it abuts against the lamination table 11; when switched to the avoidance state, the pressing sheet or the pressing needle moves horizontally to be pulled out of the diaphragm material strip 200.

[0057] The first pressing assembly 113 and the second pressing assembly 114 can alternately press the electrode 300 and one side of the diaphragm strip 200, while the third pressing assembly 115 and the fourth pressing assembly 116 can alternately press the electrode 300 and the other side of the diaphragm strip 200. In order to achieve a better pressing effect, the first pressing assembly 113, the second pressing assembly 114, the third pressing assembly 115 and the fourth pressing assembly 116 are each provided in two groups, and are distributed on both sides of the length direction of the lamination table 111. More specifically, the first pressing assembly 113 and the third pressing assembly 115 can use pressure needles to achieve pressing, and the contact area between them and the diaphragm strip 300 is small, which is convenient for pulling out; while the second pressing assembly 114 and the fourth pressing assembly 116 can use pressure plates to achieve pressing, and the contact area between them and the diaphragm strip 300 is large, which has a better pressing effect.

[0058] The diaphragm guide mechanism 120 includes a plurality of juxtaposed guide members 121. Each guide member 121 is capable of guiding and winding a diaphragm strip 200. Specifically, the guide members 121 are capable of guiding the diaphragm strips 200 unwound by the diaphragm unwinding device to the laminating table 111. Because the guide members 121 are arranged juxtaposed, the diaphragm strips 200 guided to the laminating table 111 are also arranged juxtaposed in the thickness direction, with their edges aligned.

[0059] Specifically, the guide member 121 can be a swing roller. More specifically, in this embodiment, the diaphragm guide mechanism 120 further includes a mounting bracket 122, on which the multiple guide members 121 can be rotatably mounted via bearings or the like. As the diaphragm strip 200 passes around the swing roller, it can drive the swing roller to rotate, thereby reducing friction between the diaphragm strip 200 and the guide member 121.

[0060] The drive mechanism 130 is in transmission connection with at least one of the stacking platform mechanism 110 and the membrane guide mechanism 120, and is capable of driving the stacking platform 111 and the membrane guide mechanism 120 to reciprocate relative to each other. In this manner, the plurality of membrane strips 200 guided by the plurality of guide members 121 can be driven by the drive mechanism 130 to reciprocate relative to the stacking platform 111, thereby being laid in a Z-shaped pattern on the stacking platform 111. Specifically, the plurality of membrane strips 200 reciprocate relative to the stacking platform 111, swinging along the width of the stacking platform 111.

[0061] The stacking device 100 assists the electrode transfer device, such as a stacking robot, in stacking the battery cells. Since a electrode 300 can be inserted between each two adjacent layers of diaphragm strips 200, the stacking robot can simultaneously insert multiple electrode sheets 300 between multiple diaphragm strips 200. For example, if eight guide members 121 are provided, eight diaphragm strips 200 can be simultaneously guided to the stacking table 111. Therefore, the stacking robot can insert up to seven electrode sheets 300 between the diaphragm strips 200, with the diaphragm strips 200 separating the adjacent electrode sheets 300.

[0062] After each stacking operation, the drive mechanism 130 swings the diaphragm strip 200 relative to the stacking table 111, causing it to bend. Each time the diaphragm strips 200 are bent, multiple electrode sheets 300 can be inserted. This process is repeated until the required number of electrode sheets 300 on the stacking table 111 is reached, completing the stacking of a single battery cell. After multiple bends, the diaphragm strips 200 laid on the stacking table 111 are folded into a "Z" shape.

[0063] In this embodiment, the stacking platform mechanism 110 further includes a lifting assembly 112 , and the stacking platform 111 is disposed at a lifting end of the lifting assembly 112 .

[0064] Driven by the lifting assembly 112, the stacking platform 111 can be raised and lowered in a direction generally perpendicular to its supporting surface. After each stacking operation, the lifting assembly 112 drives the stacking platform 111 down to a preset height (this preset height is equal to the sum of the thickness of the electrode sheets 300 stacked each time and the thickness of the multiple diaphragm strips 200), thereby ensuring that the topmost electrode sheets 300 on the stacking platform 111 are always at the same height. This ensures that the stacking robot's placement of the electrode sheets 300 is fixed each time, helping to reduce positioning difficulties.

[0065] Specifically, the lifting assembly 112 includes a platform base plate 1121 and a lifting rod 1122. The lifting rod 1122 is composed of two intersecting connecting rods that are rotatably hinged. One end of the lifting rod 1122 is mounted to the platform base plate 1121, and the other end is mounted to the side of the stacking platform 111 that faces away from the support surface. The lifting assembly 112 generally also includes a pneumatic or electric cylinder (not shown) disposed between the stacking platform 111 and the platform base plate 1121. It can drive the lifting rod 1122 to expand or expand, thereby driving the stacking platform 111 to move upward and downward.

[0066] In this embodiment, the guide members 121 are mounted on the mounting bracket 122, and the distance between the guide members 121 is adjustable. Specifically, each guide member 121 is mounted on the mounting bracket 122 by means of a guide rail and a slider, thereby achieving adjustable distance between the guide members 121. By adjusting the distance between the guide members 121, the spacing between the multiple diaphragm strips 200 can be adjusted.

[0067] More specifically, the diaphragm guide mechanism 120 generally further includes a drive assembly (not shown), and each guide member 121 is in transmission connection with the drive assembly and can be driven by the drive assembly to move along the mounting bracket 122. In this way, the spacing between the multiple diaphragm strips 200 can be adjusted.

[0068] Before inserting the pole piece 300, the distance between the guide members 121 can be increased to increase the spacing between the diaphragm strips 200, so as to facilitate inserting the pole piece 300 between two adjacent diaphragm strips 200; and after the pole piece 300 is inserted between the diaphragm strips 200, the distance between the guide members 121 can be decreased to reduce the spacing between the diaphragm strips 200, so that the pole piece 300 can be better clamped by the diaphragm strips 200.

[0069] In addition, in this embodiment, the driving mechanism 130 includes a rotating end capable of reciprocatingly rotating around a rotating axis, and the stacking table mechanism 110 is disposed at the rotating end of the driving mechanism 130 .

[0070] In other words, the drive mechanism 130 can drive the laminating table 111 to rotate back and forth about the rotation axis, thereby causing the multiple diaphragm strips 200 to swing back and forth relative to the laminating table 111. Therefore, the diaphragm guide mechanism 120 does not need to move relative to the laminating table 111 during the lamination process. Therefore, the diaphragm strips 200 guided by the multiple guide members 121 do not swing widely, thereby preventing the diaphragm strips 200 from shaking violently, preventing the multiple diaphragm strips 200 from tangling with each other, and maintaining the multiple diaphragm strips 200 in good alignment.

[0071] It should be noted that in other embodiments, the position of the stacking table mechanism 110 may also remain fixed, and the driving mechanism 130 may drive the multiple diaphragm material strips 200 to swing back and forth relative to the stacking table 111 by driving the diaphragm guide mechanism 120 to move back and forth along an arc path.

[0072] Furthermore, in this embodiment, two stacking station mechanisms 110 are provided, spaced apart along the circumference of the rotating shaft. Furthermore, multiple guide members 121 are capable of guiding the multiple diaphragm strips 200 onto the stacking station 111 of any stacking station mechanism 110. This allows stacking operations to be performed alternately on the two stacking station mechanisms 110, thereby reducing the time interval between successive cell stackings and further improving stacking efficiency.

[0073] The following combination Figure 4 , the working process of the above-mentioned lamination device 100 is briefly described.

[0074] Before officially starting lamination, adjust the lamination device 100 to the following Figure 4 In the initial state shown in (a), the diaphragm strips 200 guided by multiple guide members 121 are guided to the stacking table 111 of the No. 1 stacking table mechanism 110 (for the convenience of distinction, the other one is called the No. 2 stacking table mechanism 110), and the multiple diaphragm strips 200 are pressed on the edge of the stacking table 111 by the second pressing assembly 114.

[0075] The stacking robot clamps the required multiple pole pieces 300 at one time and inserts them into the gaps of the diaphragm strips 200. Then, the No. 1 stacking platform mechanism 110 rotates counterclockwise under the drive of the driving mechanism 130, so that the multiple diaphragm strips 200 swing relative to the stacking platform 111, and the multiple diaphragm strips 200 gradually approach the bearing surface of the stacking platform 111. In this process, the distance between the multiple guide members 121 can be gradually reduced, so that the gaps between the diaphragm strips 200 become smaller. As the No. 1 stacking platform mechanism 110 continues to rotate, the multiple diaphragm strips 200 and the pole pieces 300 between the diaphragm strips 200 will fit into the stacking platform 111, and the stacking device 100 switches to the following state. Figure 4 At this time, the third pressing assembly 115 can press the plurality of diaphragm strips 200 onto the lamination table 111, and the first lamination operation is completed.

[0076] After the first lamination operation is completed, the first lamination platform mechanism 110 rotates clockwise under the drive mechanism 130 to achieve the first bending of the plurality of diaphragm strips 200. The working state of the lamination device 100 is changed from Figure 4 (b) Switch to Figure 4As shown in (c) of FIG. During this process, the distance between the multiple guide members 121 gradually increases, thereby widening the gaps between the diaphragm strips 200. Next, the fourth holding member 116 switches to a holding state to hold the multiple diaphragm strips 200, while the third holding assembly 115 switches to a retracting state and withdraws from between the diaphragm strips 200.

[0077] The stacking robot once again inserts the multiple pole pieces 300 into the gaps between the multiple diaphragm strips 200, wherein the number of pole pieces 300 inserted this time is one more than the number of pole pieces 300 inserted in the first stacking operation; the No. 1 stacking table mechanism 110 continues to rotate clockwise under the drive of the driving mechanism 130, so that the multiple diaphragm strips 200 swing relative to the stacking table 111, and the multiple diaphragm strips 200 gradually approach the bearing surface of the stacking table 111. In this process, the distance between the multiple guide members 121 gradually decreases, thereby making the gaps between the diaphragm strips 200 smaller. As the No. 1 stacking table mechanism 110 continues to rotate, the multiple diaphragm strips 200 and the pole pieces 300 between the diaphragm strips 200 will fit into the stacking table 111, and the stacking device 100 switches to the following state. Figure 4 Next, the first pressing assembly 113 switches to the pressing state to press the plurality of diaphragm strips 200 onto the laminating table 111, and the second laminating operation is completed.

[0078] After the second lamination operation is completed, the first lamination platform mechanism 110 is driven by the driving mechanism 130 to rotate counterclockwise again, and the lamination device 100 returns to the position as shown in FIG. Figure 4 The initial state shown in (a) in the figure is restored, so that the multiple diaphragm strips 200 are bent again. During this process, the distance between the multiple guide members 121 can be gradually expanded, so that the gaps between the diaphragm strips 200 become larger. The second pressing assembly 114 switches to the pressing state to press the multiple diaphragm strips 200 on the stacking table 111, while the first pressing assembly 113 switches to the avoidance state and withdraws from between the diaphragm strips 200. At this point, the third stacking operation can be performed. The process of the third stacking operation is the same as the process of the first stacking operation, the difference being that the number of pole pieces 300 inserted in the third stacking operation is one more than the number of pole pieces 300 inserted in the first stacking operation. After the third stacking operation is completed, the stacking device 100 can return to the state as shown in the figure. Figure 4 The state shown in (c) above can be used to perform the fourth lamination operation, and the process of the fourth lamination operation is the same as that of the second lamination operation.

[0079] Repeat the above operation, and the working state of the lamination device 100 will be as follows: Figure 4 The working states shown in (a) to (d) are switched cyclically until the number of pole pieces 300 on the stacking table 111 reaches the required number of layers, thus completing the stacking of a battery cell.

[0080] After a cell is stacked, the stacking device 100 switches to the following Figure 4 The state shown in (e) in the figure is shown. At this point, the diaphragm strips 200 guided by the multiple guides 121 pass through the stacking table 111 of the second stacking table mechanism 110, and the first holding assembly 113 can hold the multiple diaphragm strips 200 on the second stacking table 111. The diaphragm strips 200 between the first and second stacking table mechanisms 110 are then cut away, and the stacked cells on the first stacking table mechanism 110 are removed. The multiple diaphragm strips 200 are then introduced onto the stacking table 111 of the second stacking table mechanism 110.

[0081] Finally, the second stacking platform mechanism 110 rotates clockwise under the drive of the driving mechanism 130, and the stacking device 100 switches to the following state: Figure 4 The state shown in (f) in the figure is shown. At this point, the second stacking station mechanism 110 can begin stacking the next battery cell. The subsequent stacking process of the second stacking station mechanism 110 is essentially the same as the stacking process of the first stacking station mechanism 110. The first and second stacking stations 110 alternately participate in the stacking process, ensuring that the stacking of the battery cells can continue.

[0082] In the above-mentioned lamination method and lamination device 100, multiple diaphragm strips 200 are first guided together to the lamination platform 111 during lamination. Since one electrode 300 can be inserted between two adjacent diaphragm strips 200, multiple electrode pieces 300 can be inserted simultaneously between the multiple diaphragm strips 200. In the process of driving the multiple diaphragm strips 200 to be laid in a Z-shape on the lamination platform 111, each time the multiple diaphragm strips 200 are bent, a electrode piece 300 is inserted between two adjacent layers of diaphragm strips 200 until the number of layers of the battery cell is met. Since multiple electrode pieces 300 can be stacked on the lamination platform 111 each time the multiple diaphragm strips 200 are bent, under the premise of a certain number of battery cell layers, the number of times the electrode pieces 300 are stacked and the number of times the diaphragm strips 200 are swung will be significantly reduced, thereby significantly improving the lamination efficiency.

[0083] 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.

[0084] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A lamination method, characterized in that: Including steps: S10, guiding the plurality of diaphragm strips together to a lamination table and fixing them; S20, inserting a pole piece between two adjacent layers of the diaphragm strips, and pressing the plurality of diaphragm strips and the pole pieces between the diaphragm strips onto the lamination table; S30, driving the plurality of diaphragm strips to be laid in a Z shape on the lamination table, and inserting the pole piece between two adjacent layers of the diaphragm strips each time the plurality of diaphragm strips are bent.

2. The lamination method according to claim 1, characterized in that: In steps S20 and S30, the step of inserting the electrode sheet between two adjacent layers of the diaphragm material strips includes: simultaneously obtaining a plurality of alternating positive electrode sheets and negative electrode sheets, and simultaneously inserting the positive electrode sheets and the negative electrode sheets between each two adjacent layers of the diaphragm material strips.

3. The lamination method according to claim 1, characterized in that: In the step S30, the step of driving the plurality of diaphragm strips to be laid in a Z-shape on the lamination table includes: driving the lamination table to rotate back and forth around a rotation axis to drive the plurality of diaphragm strips to swing back and forth relative to the lamination table.

4. The lamination method according to any one of claims 1 to 3, characterized in that: The number of pole pieces inserted into the diaphragm strip in step S30 is one more than the number of pole pieces inserted into the diaphragm strip in step S20.

5. A lamination device, characterized in that: It includes a stacking table mechanism, a diaphragm guide mechanism and a driving mechanism; the stacking table mechanism includes a stacking table; the diaphragm guide mechanism includes a plurality of guide members arranged in parallel; the driving mechanism is in transmission connection with at least one of the stacking table mechanism and the diaphragm guide mechanism, and can drive the stacking table and the diaphragm guide mechanism to swing back and forth relative to each other.

6. The lamination device according to claim 5, characterized in that: The stacking platform mechanism further includes a lifting assembly, and the stacking platform is arranged at a lifting end of the lifting assembly.

7. The lamination device according to claim 5, characterized in that: The stacking platform mechanism also includes a first pressing assembly, a second pressing assembly, a third pressing assembly and a fourth pressing assembly. The first pressing assembly and the second pressing assembly are distributed on one side of the stacking platform in the width direction, and the third pressing assembly and the fourth pressing assembly are distributed on the other side of the stacking platform in the width direction.

8. The lamination device according to claim 5, characterized in that: The diaphragm guide mechanism further includes a mounting bracket, the guide members are mounted on the mounting bracket, and the distance between the guide members is adjustable.

9. The lamination device according to claim 8, characterized in that The diaphragm guide mechanism further includes a driving assembly, and each of the guide members is in transmission connection with the driving assembly and can move along the mounting bracket under the drive of the driving assembly.

10. The lamination device according to any one of claims 5 to 9, characterized in that: The driving mechanism includes a rotating end capable of reciprocatingly rotating around a rotating axis, and the stacking platform mechanism is arranged at the rotating end of the driving mechanism.

11. The lamination device according to claim 10, characterized in that: There are two stacking platform mechanisms, and the two stacking platform mechanisms are spaced apart along the circumference of the rotating shaft.

12. The lamination device according to claim 5, characterized in that: The plurality of guide members can respectively guide the plurality of diaphragm strips to the lamination table; The plurality of diaphragm strips guided by the plurality of guide members can be driven by the driving mechanism to swing back and forth relative to the lamination table so as to be laid in a Z shape on the lamination table.

13. A lamination device, characterized in that: It comprises a diaphragm unwinding device, a pole piece transferring device and a lamination device as described in any one of claims 5 to 12 above.

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