A lamination device

Abstract

The utility model provides a kind of lamination device, it includes limiting body, the both sides of limiting body are respectively equipped with the fixed component of fixed lamination position and the pressure folding plate of pressure folding diaphragm.The utility model fixes lamination position by fixed component, prevent lamination from moving or the translation misplacement of lamination caused by artificial operation, then by pressure folding plate, diaphragm is laid flat layer by layer and is pressed and folded, avoid the condition of diaphragm wrinkle, improve the alignment of lamination.

Description

Technical Field

[0001] This utility model relates to the field of battery cell processing technology, specifically to a stacking device. Background Technology

[0002] In the research and development of pouch lithium-ion batteries, a key piece of equipment is typically used: a stacking machine. The stacking machine used in lithium-ion battery production is an automated mechanical device that repeatedly stacks "negative electrode / separator / positive electrode / separator". Without the availability of such automated equipment, the production of stacked pouch lithium-ion batteries is difficult. However, for small-batch trial production of stacked pouch lithium-ion batteries, manual stacking is generally used.

[0003] Chinese patent document CN209150248U discloses a tooling for manually stacking battery cells. The tooling includes a main body with a separator positioning groove in the middle. Bosses are formed at the top and sides of the separator positioning groove. Tab positioning grooves are provided on both sides of the top of the separator positioning groove. An inwardly recessed upper groove is provided in the middle of the top of the tooling body. Side grooves are provided on both sides of the tooling body, spaced apart vertically. Bottom grooves are provided near both sides of the bottom of the tooling body, with a retrieval slot between the two bottom grooves. This tooling is suitable for stacked batteries with the positive and negative tabs facing the same direction, but it suffers from problems such as poor alignment, electrode misalignment, and separator wrinkles. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to provide a stacking device that can avoid diaphragm wrinkles and improve alignment.

[0005] This utility model solves the above-mentioned technical problems through the following technical means: This utility model provides a stacking device, which includes a limiting body, and fixing components for fixing the stacking position and pressing plates for pressing and folding the diaphragm are respectively provided on both sides of the limiting body.

[0006] Beneficial effects: This utility model fixes the position of the stacked pieces by fixing components to prevent the stacked pieces from moving or being misaligned due to human operation. Then, the diaphragm is laid flat layer by layer by pressing and folding plate to avoid diaphragm wrinkles and improve the alignment of the stacked pieces.

[0007] Preferably, the limiting body includes a base plate and a rectangular frame, with the base plate fixed to the bottom of the rectangular frame.

[0008] Beneficial effects: This utility model uses a base plate to lay the diaphragm and positive and negative electrode sheets flat, and a rectangular frame to limit the position of the diaphragm and positive and negative electrode sheets.

[0009] Preferably, the limiting body is provided with adhesive grooves, which are symmetrically arranged around the limiting body.

[0010] Preferably, the limiting body is divided into three regions: a positive electrode limiting region, a negative electrode limiting region, and a separator limiting region. The positive electrode limiting region and the negative electrode limiting region are located on the upper part of the limiting body, and the remaining area of ​​the limiting body is the separator limiting region.

[0011] Preferably, the pressure plate is a stainless steel plate.

[0012] Preferably, the length of the pressure plate is less than that of the limiting body.

[0013] Preferably, the fixing component is fixed to one side of the limiting body, and the fixing component is provided with a soft rubber pad.

[0014] Beneficial effects: This utility model has a soft rubber pad on the fixing component to prevent the stacked pieces from being damaged by the clamping plate.

[0015] Preferably, the soft rubber pad is semi-circular.

[0016] Beneficial effects: This utility model sets the soft rubber pad in a semi-circular shape, which is conducive to laying and fixing the stacked pieces flat and convenient to operate.

[0017] Preferably, the fixing component includes a first plate, a right-angle plate, and a second plate. The first plate is connected to one end of the right-angle plate, and the other end of the right-angle plate is connected to the second plate. The soft rubber pad is disposed at the bottom of the second plate.

[0018] Preferably, the first plate and the right-angle plate are connected by a spring, and the right-angle plate is connected to the center of the surface of the second plate.

[0019] Beneficial effects: This utility model uses pressing the first flat plate to move the bottom soft rubber pad left and right, which is used to fix the stacked pieces.

[0020] Preferably, the bottom of the clamping plate is placed on the surface of the base plate, and the spring is fixed to the side of the limiting body.

[0021] Beneficial effects: The side of the limiting body of this utility model provides support for the clamping plate. The clamping plate is fixed to the side of the limiting body by a spring, which can realize the purpose of moving the soft rubber pad.

[0022] The advantages of this utility model are: This utility model provides a tooling for manual stacking of stacked batteries, which is easy to operate and solves problems such as misalignment, electrode misalignment, and separator wrinkles that are easy to occur in the manual stacking process. It improves the pass rate of the stacking process, avoids waste of raw materials, accelerates the research and development process, and significantly reduces the investment in research and development equipment costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the stacking device in the embodiment; Figure 2 This is a top view of the stacking device in the embodiment; Figure 3 This is a schematic diagram of the clamping plate in the embodiment; Figure 4 This is a schematic diagram of the stacked sheets in the embodiment. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] according to Figure 1-3 As shown, this embodiment provides a stacking device, which includes a limiting body 1. The limiting body 1 includes a base plate 4 and a rectangular frame (not shown in the figure). The base plate 4 is fixed to the bottom of the rectangular frame. The base plate 4 is used to lay the separator and positive and negative electrode sheets flat. The rectangular frame is used to limit the position of the separator and positive and negative electrode sheets.

[0027] The limiting body 1 is provided with adhesive grooves 5, and there are multiple adhesive grooves 5. In this embodiment, there are 6 grooves, which are symmetrically arranged around the limiting body 1. Figure 2 As shown, two positioning grooves are symmetrically arranged on the left and right sides of the limiting body 1, and one is symmetrically arranged on the top and bottom sides. The adhesive groove 5 is used for adhesive tape to adhere to the diaphragm, so that it can be stacked completely.

[0028] like Figure 2 As shown, the limiting body 1 is divided into three regions: the positive electrode limiting region 6, the negative electrode limiting region 7, and the separator limiting region 8. The positive electrode limiting region 6 and the negative electrode limiting region 7 are located on the upper part of the limiting body 1 and on both sides of the adhesive groove 5. The positive electrode limiting region 6 and the negative electrode limiting region 7 are provided with limiting plates (not shown in the figure). The limiting plates are arranged opposite to each other to limit the tabs of the positive and negative electrodes. The remaining area of ​​the limiting body 1 is the separator limiting region 8.

[0029] like Figure 1 As shown, the left and right sides of the limiting body 1 are respectively provided with fixing components 2 for fixing the stacked pieces and pressing plates 3 for pressing and folding the diaphragm. In this embodiment, the pressing plate 3 is provided on the left side. The pressing plate 3 is a stainless steel plate, the length of which is less than that of the limiting body 1, and its width is not specifically limited, as long as it is less than the width of the limiting body 1. In this embodiment, the width of the pressing plate 3 is 20mm. During manual stacking, the diaphragm is laid flat layer by layer by the operator through the pressing plate 3, and then the diaphragm is pressed and folded to avoid wrinkles in the diaphragm and to fix the diaphragm, thereby improving the alignment of the stacked pieces.

[0030] The fixing component 2 is located on the right side of the limiting body 1 and between the two adhesive grooves 5. The fixing component 2 includes a first plate 21, a right-angle plate 22, and a second plate 23. One end of the first plate 21 and the right-angle plate 22 are connected by a spring, and the connection point is fixed to the right side of the limiting body 1. The other end of the right-angle plate 22 is connected to the center of the upper surface of the second plate 23. The lower surface of the second plate 23 is used to fix the stacked sheets, preventing movement or misalignment due to manual operation. During manual stacking, pressing the first plate 21 raises or lowers the second plate 23, thus achieving the functions of flattening the diaphragm and positive / negative electrode sheets and fixing the stacked sheets.

[0031] To prevent the stacked sheets from being broken, a soft rubber pad 9 is provided on the lower surface of the second flat plate 23. The soft rubber pad 9 is semi-circular, which facilitates manual operation and is beneficial for laying or fixing the stacked sheets.

[0032] like Figure 4 As shown, the specific operating principle of the stacking device in this embodiment is as follows: 1. Place a diaphragm 10 on the diaphragm limiting area 8 of the limiting body 1, use the fixing component 2 to clamp the diaphragm on the right side of the diaphragm limiting area 8, lay the diaphragm 10 flat from right to left, and then use the pressure plate 3 to press the left end of the diaphragm 10. This is the first layer of diaphragm 10. Then take a negative electrode 12, align the tab of the negative electrode 12 with the diaphragm 10 and embed it into the negative electrode limiting area 7. Lay the negative electrode 12 flat on top of the first layer of diaphragm.

[0033] 2. Then lay the diaphragm 10 flat from left to right, and use the fixing component 2 to clamp the diaphragm 10 on the right side of the diaphragm limiting area 8. This is the second layer of diaphragm. At this time, the pressure plate 3 continues to press the left end of the first layer of diaphragm, and then the pressure plate 3 is pulled out from below the left end of the second layer of diaphragm and changed to press and fold above the left end of the second layer of diaphragm.

[0034] 3. Finally, take a positive electrode 11, align the tab of the positive electrode 11 with the separator 10 and embed it into the positive electrode limiting area 6. Lay the positive electrode flat on top of the second separator. Then lay the separator 10 flat from right to left. Use the fixing clamp 2 to clamp the right end of the separator 10 and use the pressing and folding plate 3 to press the left end of the separator. This is the third separator.

[0035] 4. Repeat steps one through three above in sequence, as shown in the attached document. Figure 4 As shown, a stacked cell structure of "separator / negative electrode / separator / positive electrode..." can be obtained. When finishing the stacking, ensure it ends with "...negative electrode / separator". Use fixing component 2 to clamp the right side of the stack and use pressure plate 3 to press the left side of the stack. It is important to ensure that the separator completely covers the negative electrode, and the four sides of the positive electrode should not extend beyond the negative electrode. Generally, the four sides of the positive electrode should be 2 mm shorter than the four sides of the negative electrode.

[0036] 5. Cut six pieces of high-temperature tape of appropriate length and stick them to the bottom and top separators from the six adhesive grooves 5 respectively, thus obtaining a complete stacked cell.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stacking device, characterized in that, It includes a limiting body (1), and a fixing component (2) for fixing the stacked pieces and a pressing plate (3) for pressing the diaphragm are respectively provided on both sides of the limiting body (1); the fixing component (2) is fixed on one side of the limiting body (1), and the fixing component (2) is provided with a soft rubber pad (9); the fixing component (2) includes a first plate (21), a right angle plate (22) and a second plate (23), the first plate (21) is connected to one end of the right angle plate (22), the other end of the right angle plate (22) is connected to the second plate (23), and the soft rubber pad (9) is set at the bottom of the second plate (23).

2. The stacking device according to claim 1, characterized in that, The limiting body (1) includes a base plate (4) and a rectangular frame, with the base plate (4) fixed to the bottom of the rectangular frame.

3. The stacking device according to claim 2, characterized in that, The limiting body (1) is provided with adhesive grooves (5), which are symmetrically arranged around the limiting body (1).

4. The stacking device according to claim 3, characterized in that, The limiting body (1) is divided into three regions: the positive electrode limiting region (6), the negative electrode limiting region (7), and the separator limiting region (8). The positive electrode limiting region (6) and the negative electrode limiting region (7) are located on the upper part of the limiting body (1), and the remaining area of ​​the limiting body (1) is the separator limiting region (8).

5. The stacking apparatus according to claim 1, characterized in that, The pressure plate (3) is a stainless steel plate; the length of the pressure plate (3) is less than that of the limiting body (1).

6. The stacking apparatus according to claim 1, characterized in that, The soft rubber pad (9) is semi-circular.

7. The stacking apparatus according to claim 1, characterized in that, The first plate (21) is connected to the right-angle plate (22) by a spring, and the right-angle plate (22) is connected to the center of the surface of the second plate (23).

8. The stacking apparatus according to claim 7, characterized in that, The spring is fixed on the side of the limiting body (1).

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