Battery cell tape-wrapping device and battery cell tape-wrapping method

Abstract

A battery cell tape-wrapping device and a battery cell tape-wrapping method. The battery cell tape-wrapping device comprises a tape folding mechanism (1) and a tape pressing mechanism (2). The tape folding mechanism (1) comprises a tape-folding driving assembly (11) and a tape folding assembly (12), wherein the tape folding assembly (12) is provided with a tape folding hole (1211); the hole wall of the tape folding hole (1211) comprises a tape folding hole wall (12111), the tape folding hole wall (12111) being inclined towards a central hole of a battery cell (20) from the side thereof close to an end face of the battery cell (20) to the side thereof away from the end face of the battery cell (20); and the tape-folding driving assembly (11) can drive the tape folding assembly (12) to move towards the end face of the battery cell (20), such that the hole wall of the tape folding hole (1211) folds an adhesive tape (30), which extends beyond the end face of the battery cell (20), towards the central hole of the battery cell (20). The tape pressing mechanism (2) comprises a tape-pressing driving assembly (21) and a tape pressing assembly (22), wherein the tape-pressing driving assembly (21) can drive the tape pressing assembly (22) to move towards the end face of the battery cell (20), such that the tape pressing assembly (22) passes through the tape folding hole (1211) to press the folded adhesive tape (30) against the end face of the battery cell (20).

Description

Battery cell coating device and battery cell coating method

[0001] This application claims priority to Chinese Patent Application No. 202510449621.6, filed with the Chinese Patent Office on April 10, 2025, the entire contents of which are incorporated herein by reference.

[0002] Technical Field

[0003] This application relates to the field of battery manufacturing technology, for example to a cell coating apparatus and a cell coating method.

[0004] Background Technology

[0005] During battery manufacturing, to ensure insulation between the battery cell's tabs and the casing / cover, adhesive tape is typically applied to the tab end of the battery cell in its structural design to achieve insulation. In related technologies, when coating the battery cell, adhesive tape is usually first applied to the outer periphery of the cell, extending beyond the end of the cell. Then, the extended portion of the adhesive tape is directly pressed onto the tab end face of the cell.

[0006] Technical issues

[0007] The coating method in related technologies makes it impossible to control the shape of the adhesive tape. During the pressing process, the adhesive tape extending out of the battery cell tends to fold towards the outside of the battery cell, causing the adhesive tape to exceed the end face of the electrode tab or the outer diameter of the battery cell. It also easily leads to the adhesive tape not being completely attached to the end face of the battery cell, reducing the coating yield and coating consistency, and increasing the scrap rate of the product.

[0008] Technical solutions

[0009] This application provides a battery cell coating device, comprising:

[0010] The adhesive collection mechanism includes an adhesive collection drive assembly and an adhesive collection assembly. The adhesive collection assembly has an adhesive collection hole, and the hole wall includes an adhesive collection hole wall. The adhesive collection hole wall is inclined from the side near the end face of the battery cell to the side away from the end face of the battery cell towards the center hole of the battery cell. The output end of the adhesive collection drive assembly is connected to the adhesive collection assembly for transmission. The adhesive collection drive assembly can drive the adhesive collection assembly to move towards the end face of the battery cell, so that the hole wall of the adhesive collection hole folds the adhesive paper extending from the end face of the battery cell towards the center hole of the battery cell.

[0011] The adhesive pressing mechanism includes an adhesive pressing drive component and an adhesive pressing component. The output end of the adhesive pressing drive component is connected to the adhesive pressing component for transmission. The adhesive pressing drive component can drive the adhesive pressing component to move towards the end face of the battery cell, so that the adhesive pressing component passes through the adhesive receiving hole and presses the folded adhesive paper onto the end face of the battery cell.

[0012] In some implementations, multiple glue-collecting teeth are provided at intervals along the circumference of the glue-collecting hole on the hole wall, and the inner wall of the glue-collecting teeth is inclined towards the center hole of the battery cell from the side near the end face of the battery cell to the side away from the end face of the battery cell.

[0013] In some implementations, the wall of the glue collection hole also includes a mounting hole wall, which is connected to the side of the glue collection hole wall away from the end face of the battery cell, and multiple glue collection teeth are provided on the mounting hole wall at intervals along the circumference of the glue collection hole.

[0014] In some implementations, the inner wall of the collecting tooth extends from the end face of the battery cell to the end face of the collecting hole wall away from the battery cell, and the inclination angle of the inner wall of the collecting tooth is the same as the inclination angle of the collecting hole wall.

[0015] Some implementations also include at least one of the following:

[0016] The inclination angle of the glue collection hole wall is 30° to 70°;

[0017] Alternatively, the inclination angle of the inner wall of the rubber-collecting tooth is 30° to 70°.

[0018] In some implementations, a through-groove is formed between two adjacent glue-collecting teeth. Multiple glue-pressing teeth are arranged at intervals along the circumference of the glue-pressing assembly on the outer peripheral wall of the glue-pressing assembly. The multiple glue-pressing teeth are arranged one-to-one with the multiple through-grooves, and the glue-pressing teeth can pass through the corresponding through-grooves.

[0019] In some implementations, the cell coating device also includes:

[0020] Mounting base, which is equipped with a glue collection drive assembly and a glue pressing drive assembly;

[0021] The guide rail is mounted on the mounting base and extends along the movement direction of the glue collection assembly and the glue pressing assembly, and both the glue collection assembly and the glue pressing assembly move along the guide rail.

[0022] In some implementations, both ends of the battery cell in the axial direction are equipped with a glue-collecting mechanism and a glue-pressing mechanism.

[0023] In some implementations, the cell coating device also includes:

[0024] The clamping mechanism is provided with a clamping groove, which is configured to clamp and fix the battery cell.

[0025] This application also provides a method for coating battery cells, applied to the above-mentioned battery cell coating apparatus, the method comprising:

[0026] The adhesive collection drive assembly drives the adhesive collection component to move towards the end face of the battery cell, so that the wall of the adhesive collection hole folds the adhesive paper extending from the end face of the battery cell toward the center hole of the battery cell.

[0027] The adhesive pressing drive assembly moves the adhesive pressing assembly toward the end face of the battery cell, so that the adhesive pressing assembly passes through the adhesive collection hole and presses the folded adhesive paper onto the end face of the battery cell.

[0028] Beneficial effects

[0029] This application provides a battery cell coating device. During the coating operation, the device first drives a reeling component to move towards the end face of the battery cell via a reeling drive component. This causes the wall of the reeling hole to fold the adhesive paper extending from the end face of the battery cell towards the center hole of the battery cell, achieving a pre-reeling operation. Then, a pressing drive component drives a pressing component to move towards the end face of the battery cell. This causes the pressing component to pass through the reeling hole and press the folded adhesive paper onto the end face of the battery cell. This not only prevents the adhesive paper extending from the end face of the battery cell from folding outwards during the pressing process, but also effectively ensures that the adhesive paper extending from the end face of the battery cell can be completely adhered to the end face of the battery cell, improving the coating yield and consistency, and reducing the product scrap rate.

[0030] This application also provides a method for coating a battery cell. In this method, during the coating operation, a glue-collecting drive assembly first moves the glue-collecting component towards the end face of the battery cell, causing the wall of the glue-collecting hole to fold the adhesive paper extending from the end face of the battery cell towards the center hole of the battery cell. Then, a glue-pressing drive assembly moves the glue-pressing component towards the end face of the battery cell, causing the glue-pressing component to pass through the glue-collecting hole and press the folded adhesive paper onto the end face of the battery cell. This not only avoids the adhesive paper extending from the end face of the battery cell folding outwards during the glue-pressing process, but also effectively ensures that the adhesive paper extending from the end face of the battery cell can be completely adhered to the end face of the battery cell, improving the coating yield and coating consistency, and reducing the product scrap rate.

[0031] Attached Figure Description

[0032] Figure 1 is a first structural schematic diagram of the battery cell coating device provided in some implementations of this application;

[0033] Figure 2 is a schematic diagram of the structure of the glue collection plate provided in some implementations of this application;

[0034] Figure 3 is a structural cross-sectional view of the glue collection assembly provided in some implementations of this application;

[0035] Figure 4 is a schematic diagram of the second structure of the battery cell coating device provided in some implementations of this application;

[0036] Figure 5 is a schematic diagram of the third structure of the battery cell coating device provided in some implementations of this application;

[0037] Figure 6 is a fourth structural schematic diagram of the battery cell coating device provided in some implementations of this application;

[0038] Figure 7 is a flowchart of a cell coating method provided in some implementations of this application.

[0039] In the picture:

[0040] 20. Battery cell; 30. Adhesive tape;

[0041] 1. Glue collection mechanism; 11. Glue collection drive assembly; 12. Glue collection assembly; 121. Glue collection plate; 1211. Glue collection hole; 12111. Glue collection hole wall; 12112. Mounting hole wall; 1212. Glue collection tooth; 1213. Through slot; 122. Connecting plate; 1221. First slide groove;

[0042] 2. Adhesive pressing mechanism; 21. Adhesive pressing drive assembly; 22. Adhesive pressing assembly; 221. Adhesive pressing column; 2211. Adhesive pressing teeth; 222. Mounting plate; 2221. Second slide groove;

[0043] 3. Mounting base; 4. Guide rail;

[0044] 5. Clamping mechanism; 51. Clamping groove.

[0045] Embodiments of the present invention

[0046] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or indicating that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or indicating that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0049] As shown in Figures 1 to 6, this embodiment provides a battery cell coating device, which includes a coating receiving mechanism 1 and a coating pressing mechanism 2. The coating receiving mechanism 1 includes a coating receiving drive assembly 11 and a coating receiving assembly 12. The coating receiving assembly 12 has a coating receiving hole 1211. The hole wall of the coating receiving hole 1211 includes a coating receiving hole wall 12111. The coating receiving hole wall 12111 is inclined from the side of its end face near the battery cell 20 to the side of its end face away from the battery cell 20 toward the central hole of the battery cell 20. The output end of the coating receiving drive assembly 11 is connected to the coating receiving assembly 12. The coating receiving drive assembly 11 can drive the coating receiving assembly 12 to move toward the end face near the battery cell 20, so that the hole wall of the coating receiving hole 1211 folds the adhesive paper 30 extending out of the end face of the battery cell 20 toward the central hole of the battery cell 20. The adhesive pressing mechanism 2 includes an adhesive pressing drive assembly 21 and an adhesive pressing assembly 22. The output end of the adhesive pressing drive assembly 21 is connected to the adhesive pressing assembly 22 in a transmission manner. The adhesive pressing drive assembly 21 can drive the adhesive pressing assembly 22 to move towards the end face of the battery cell 20, so that the adhesive pressing assembly 22 passes through the adhesive receiving hole 1211 and presses the folded adhesive paper 30 onto the end face of the battery cell 20.

[0050] The battery cell coating device provided in this embodiment, when performing the coating operation on the battery cell 20, as shown in Figures 1 and 4, firstly, the glue-receiving drive assembly 11 drives the glue-receiving assembly 12 to move towards the end face of the battery cell 20, so that the wall of the glue-receiving hole 1211 folds the adhesive paper 30 extending out of the end face of the battery cell 20 towards the center hole of the battery cell 20, realizing the pre-receiving operation of the adhesive paper 30. Then, as shown in Figure 5, the glue-pressing drive assembly 21 drives the glue-pressing assembly 22 towards the end face of the battery cell 20. The end face of the battery cell 20 moves in a certain direction so that the adhesive pressing assembly 22 passes through the adhesive receiving hole 1211 and presses the folded adhesive paper 30 onto the end face of the battery cell 20. This not only prevents the adhesive paper 30 extending outward from the battery cell 20 from folding outward during the adhesive pressing process, but also effectively ensures that the adhesive paper 30 extending outward from the battery cell 20 can be completely adhered to the end face of the battery cell 20, thereby improving the coating yield and coating consistency, and reducing the product scrap rate.

[0051] In this embodiment, as shown in FIG1, before the battery cell 20 is coated, the outer periphery of the end of the battery cell 20 is already wrapped with adhesive tape 30, and the adhesive tape 30 extends outward from the end of the battery cell 20. As shown in FIG6, the battery cell coating device is only used to press and adhere the adhesive tape 30 extending outward from the end face of the battery cell 20 to the end face of the battery cell 20, and the adhesive tape 30 only covers the edge of the end of the battery cell 20, rather than covering the entire end of the battery cell 20.

[0052] Optionally, in this embodiment, the glue-receiving drive assembly 11 can be a drive cylinder, which has the advantage of reliable operation. Optionally, the glue-pressing drive assembly 21 can be a drive cylinder, which also has the advantage of reliable operation. Optionally, in this embodiment, as shown in FIG6, after the battery cell coating device completes the coating operation on the battery cell 20, the glue-pressing drive assembly 21 drives the glue-pressing assembly 22 to move and reset in a direction away from the end face of the battery cell 20, and then the glue-receiving drive assembly 11 drives the glue-receiving assembly 12 to move and reset in a direction away from the end face of the battery cell 20, so as to facilitate the coating operation on the next battery cell 20.

[0053] Optionally, in this embodiment, as shown in FIG1, the battery cell coating device further includes a clamping mechanism 5, which is provided with a clamping groove 51 for clamping and fixing the battery cell 20. Optionally, in this embodiment, the clamping groove 51 clamps and fixes the outer peripheral wall of the battery cell 20, and the outer peripheral side of the battery cell 20 clamped by the clamping groove 51 is already wrapped and fixed with adhesive paper 30, and the adhesive paper 30 extends out of the end of the battery cell 20. Optionally, the clamping mechanism 5 is provided with a plurality of clamping grooves 51 at intervals, and each clamping groove 51 is configured to clamp and fix one battery cell 20. Optionally, in this embodiment, when the conveying device transports the clamping mechanism 5 holding the battery cell 20 to the glue receiving mechanism 1 and the glue pressing mechanism 2, the battery cell coating device performs a coating operation on the battery cell 20 held and fixed by the clamping mechanism 5. After the battery cell coating device completes the coating operation on the battery cell 20, the conveying device transports the clamping mechanism 5 holding the battery cell 20 to the next workstation. This arrangement makes the structure of the battery cell coating device ingeniously designed. It can be directly added to existing battery manufacturing equipment and can share the process cycle time with other workstations on the battery manufacturing equipment, effectively improving the device's uptime, increasing production capacity, improving process yield, and improving product performance. The specific structure of the clamping groove 51 that holds and fixes the outer periphery of the battery cell 20 is not limited in this application.

[0054] Optionally, in this embodiment, as shown in Figures 2 and 3, a plurality of adhesive-collecting teeth 1212 are spaced circumferentially along the wall of the adhesive-collecting hole 1211, and the inner wall of the adhesive-collecting teeth 1212 is inclined towards the central hole of the battery cell 20 from the side near the end face of the battery cell 20 to the side away from the end face of the battery cell 20. By providing a plurality of adhesive-collecting teeth 1212, the adhesive paper 30 extending outward from the end face of the battery cell 20 is folded towards the central hole of the battery cell 20, ensuring the uniformity of the folding of the adhesive paper 30 at multiple positions in the circumferential direction towards the central hole of the battery cell 20, effectively improving the folding effect of the adhesive paper 30.

[0055] Optionally, the number of adhesive receiving teeth 1212 can be optimized and adapted according to the flatness requirements of the adhesive paper 30 after compression and the degree of wrinkling of the adhesive paper 30. In this embodiment, the specific number of adhesive receiving teeth 1212 is not specifically limited.

[0056] Optionally, in this embodiment, as shown in Figures 2 and 3, the wall of the glue collection hole 1211 further includes a mounting hole wall 12112. The mounting hole wall 12112 is connected to the side of the glue collection hole wall 12111 away from the end face of the battery cell 20, and a plurality of glue collection teeth 1212 are provided on the mounting hole wall 12112 at intervals along the circumference of the glue collection hole 1211. This configuration ensures that when the adhesive pressing assembly 22 is fed towards the end face of the battery cell 20, the adhesive receiving hole wall 12111 first contacts the adhesive paper 30 extending outward from the end face of the battery cell 20. Under the action of the adhesive receiving hole wall 12111, the adhesive paper 30 is folded towards the center hole of the battery cell 20. As the adhesive pressing assembly 22 continues to feed, multiple adhesive receiving teeth 1212 then contact the adhesive paper 30, causing the adhesive paper 30 to continue to fold towards the center hole of the battery cell 20 under the action of the inner walls of the multiple adhesive receiving teeth 1212, effectively improving the folding effect of the adhesive paper 30.

[0057] Optionally, in this embodiment, as shown in Figures 2 and 3, the inner wall of the adhesive-collecting tooth 1212 extends from the end face of the cell 20 to the end face of the adhesive-collecting hole wall 12111 away from the cell 20, and the inclination angle of the inner wall of the adhesive-collecting tooth 1212 is the same as the inclination angle of the adhesive-collecting hole wall 12111. This arrangement effectively ensures the continuity of the adhesive paper 30 being folded sequentially by the inner walls of the adhesive-collecting hole wall 12111 and the adhesive-collecting tooth 1212, thus ensuring the folding effect of the adhesive paper 30.

[0058] Optionally, in this embodiment, the inclination angle of the adhesive collection hole wall 12111 is 30° to 70°. For example, the inclination angle of the adhesive collection hole wall 12111 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, or 70°. Setting these values ​​achieves a slow folding of the adhesive tape 30, ensuring the folding effect of the adhesive tape 30. Optionally, in this embodiment, the inclination angle of the inner wall of the adhesive collection tooth 1212 is 30° to 70°. For example, the inclination angle of the inner wall of the adhesive collection tooth 1212 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, or 70°. Setting these values ​​achieves a slow folding of the adhesive tape 30, ensuring the folding effect of the adhesive tape 30. As long as the inclination angle of the wall of the glue collection hole 12111 is the same as the inclination angle of the inner wall of the glue collection tooth 1212, it is acceptable.

[0059] In this embodiment, the battery cell 20 is a cylindrical battery cell. In other embodiments, the shape of the battery cell 20 is not limited to cylindrical; it can also be elliptical, square, rhomboid, polygonal, or racetrack-shaped, etc., and the size of the battery cell 20 can be adapted according to specific needs. The adhesive tape 30 can be brown high-temperature insulating tape, or it can be other components that serve an insulating function.

[0060] Optionally, in this embodiment, as shown in Figures 1 and 3, the glue collection assembly 12 includes a glue collection plate 121 and a connecting plate 122 connected to each other. The glue collection plate 121 has a glue collection hole 1211, and the connecting plate 122 is connected to the output end of the glue collection drive assembly 11.

[0061] Optionally, in this embodiment, as shown in Figures 1 to 3, a through-groove 1213 is formed between two adjacent adhesive-collecting teeth 1212. Multiple adhesive-collecting teeth 2211 are spaced apart along the circumference of the outer peripheral wall of the adhesive-collecting assembly 22. Each adhesive-collecting tooth 2211 corresponds to one of the multiple through-grooves 1213, allowing the adhesive-collecting teeth 2211 to pass through the corresponding through-grooves 1213. This arrangement ensures that the end face of the adhesive-collecting assembly 22 and the end faces of the multiple adhesive-collecting teeth 2211 jointly press the folded adhesive paper 30 against the end face of the battery cell 20, guaranteeing the uniformity of pressure applied to multiple positions along the circumference of the adhesive paper 30 and effectively ensuring the flatness of the pressed adhesive paper 30.

[0062] Optionally, in this embodiment, as shown in Figures 4-6, the adhesive pressing assembly 22 includes an adhesive pressing column 221 and a mounting plate 222 connected together. Multiple adhesive pressing teeth 2211 are spaced circumferentially along the outer peripheral wall of the adhesive pressing column 221. The end faces of the adhesive pressing column 221 and the multiple adhesive pressing teeth 2211 together press the folded adhesive paper 30 against the end face of the battery cell 20. The mounting plate 222 is drive-connected to the output end of the adhesive pressing drive assembly 21. Optionally, the end faces of the adhesive pressing column 221 and the multiple adhesive pressing teeth 2211 are flat and smooth to ensure the flatness of the adhesive paper 30 being pressed. Optionally, the shape of the end face of the adhesive pressing column 221 and the shape of the end faces of the multiple adhesive pressing teeth 2211 match the shape of the tab end face. Optionally, in this embodiment, the adhesive pressing assembly 22 can be made of 304 stainless steel, bakelite, ceramic material, or stainless steel with a wear-resistant coating. This embodiment does not limit the specific material of the adhesive pressing assembly 22. Optionally, the adhesive receiving hole 1211 and the adhesive pressing post 221 are aligned along the axial direction of the battery cell 20, thereby ensuring that the adhesive pressing post 221 and the adhesive pressing teeth 2211 on the adhesive pressing post 221 pass through the adhesive receiving hole 1211.

[0063] Optionally, in this embodiment, as shown in FIG1, the battery cell coating device further includes a mounting base 3 and a guide rail 4. The mounting base 3 is provided with a glue-collecting drive assembly 11 and a glue-pressing drive assembly 21. The guide rail 4 is disposed on the mounting base 3 and extends along the moving direction of the glue-collecting assembly 12 and the glue-pressing assembly 22, and both the glue-collecting assembly 12 and the glue-pressing assembly 22 move along the guide rail 4. By providing the guide rail 4 on the mounting base 3, guidance is provided for the movement of the glue-collecting assembly 12 and the glue-pressing assembly 22, ensuring the reliability of the glue-collecting assembly 12 in folding the adhesive paper 30 and the reliability of the glue-pressing assembly 22 in pressing the adhesive paper 30. Furthermore, by having the glue-collecting assembly 12 and the glue-pressing assembly 22 share a single guide rail 4 for guidance, the structure becomes compact and simple. Optionally, in this embodiment, a first sliding groove 1221 is provided on the connecting plate 122, and the first sliding groove 1221 slides along the guide rail 4. Optionally, a second slide groove 2221 is provided on the mounting plate 222, and the second slide groove 2221 slides along the guide rail 4.

[0064] In this embodiment, as shown in Figures 4 to 6, a glue-collecting mechanism 1 and a glue-pressing mechanism 2 are provided at both ends of the battery cell 20 in the axial direction. The glue-collecting mechanism 1 and the glue-pressing mechanism 2 are both provided on the mounting base 3 on the corresponding side, so that the glue-coating work is performed on both ends of the battery cell 20 in the axial direction at the same time, which effectively improves the glue-coating efficiency.

[0065] In this embodiment, as shown in FIG7, a method for coating a battery cell is also provided. This method is applied to the battery cell coating apparatus provided in this application, and the method includes the following steps:

[0066] S1. The glue collection drive assembly 11 drives the glue collection assembly 12 to move towards the end face of the battery cell 20, so that the wall of the glue collection hole 1211 folds the adhesive paper 30 extending out of the end face of the battery cell 20 towards the center hole of the battery cell 20.

[0067] S2. The adhesive pressing drive assembly 21 drives the adhesive pressing assembly 22 to move toward the end face of the battery cell 20, so that the adhesive pressing assembly 22 passes through the adhesive receiving hole 1211 and presses the folded adhesive paper 30 onto the end face of the battery cell 20.

[0068] The battery cell coating method provided in this embodiment first drives the adhesive receiving component 12 to move closer to the end face of the battery cell 20 during the coating operation, so that the wall of the adhesive receiving hole 1211 folds the adhesive paper 30 extending from the end face of the battery cell 20 toward the center hole of the battery cell 20. Then, the adhesive pressing component 21 drives the adhesive pressing component 22 to move closer to the end face of the battery cell 20, so that the adhesive pressing component 22 passes through the adhesive receiving hole 1211 and presses the folded adhesive paper 30 onto the end face of the battery cell 20. This not only avoids the adhesive paper 30 extending from the end of the battery cell 20 from folding outwards during the adhesive pressing process, but also effectively ensures that the adhesive paper 30 extending from the end of the battery cell 20 can be completely adhered to the end face of the battery cell 20, improving the coating yield and coating consistency, and reducing the product scrap rate.

[0069] After the coating operation of the battery cell 20 is completed, the pressure drive assembly 21 drives the pressure assembly 22 to move and reset in the direction away from the end face of the battery cell 20. Then, the glue collection drive assembly 11 drives the glue collection assembly 12 to move and reset in the direction away from the end face of the battery cell 20, so as to facilitate the coating operation of the next battery cell 20.

Claims

1. A battery cell coating device, comprising: The glue collection mechanism (1) includes a glue collection drive assembly (11) and a glue collection assembly (12). The glue collection assembly (12) has a glue collection hole (1211). The wall of the glue collection hole (1211) includes a glue collection hole wall (12111). The glue collection hole wall (12111) is inclined from the side near the end face of the battery cell (20) to the side away from the end face of the battery cell (20) toward the center hole of the battery cell (20). The output end of the glue collection drive assembly (11) is connected to the glue collection assembly (12). The glue collection drive assembly (11) can drive the glue collection assembly (12) to move toward the end face of the battery cell (20) so that the wall of the glue collection hole (1211) folds the adhesive paper (30) extending out of the end face of the battery cell (20) toward the center hole of the battery cell (20). The adhesive pressing mechanism (2) includes an adhesive pressing drive assembly (21) and an adhesive pressing assembly (22). The output end of the adhesive pressing drive assembly (21) is connected to the adhesive pressing assembly (22). The adhesive pressing drive assembly (21) can drive the adhesive pressing assembly (22) to move towards the end face of the battery cell (20) so that the adhesive pressing assembly (22) passes through the adhesive receiving hole (1211) and presses the folded adhesive paper (30) onto the end face of the battery cell (20).

2. The battery cell coating device according to claim 1, wherein, The wall of the receiving hole (1211) is provided with a plurality of receiving teeth (1212) spaced circumferentially along the receiving hole (1211), and the inner wall of the receiving teeth (1212) is inclined from the side near the end face of the battery cell (20) to the side away from the end face of the battery cell (20) toward the center hole of the battery cell (20).

3. The battery cell coating device according to claim 2, wherein, The wall of the glue collection hole (1211) also includes a mounting hole wall (12112), which is connected to the side of the glue collection hole wall (12111) away from the end face of the battery cell (20), and a plurality of glue collection teeth (1212) are provided on the mounting hole wall (12112) at intervals along the circumference of the glue collection hole (1211).

4. The cell coating device according to claim 3, wherein, The inner wall of the collecting tooth (1212) extends from the end face of the battery cell (20) to the end face of the collecting hole wall (12111) away from the battery cell (20), and the inclination angle of the inner wall of the collecting tooth (1212) is the same as the inclination angle of the collecting hole wall (12111).

5. The battery cell coating apparatus according to any one of claims 2 to 4, further comprising at least one of the following: The inclination angle of the wall of the glue collection hole (12111) is 30° to 70°; Alternatively, the inclination angle of the inner wall of the receiving tooth (1212) is 30° to 70°.

6. The battery cell coating apparatus according to any one of claims 2 to 4, wherein, A through-groove (1213) is formed between two adjacent glue-collecting teeth (1212). Multiple glue-collecting teeth (2211) are arranged at intervals along the circumference of the glue-collecting assembly (22) on the outer peripheral wall of the glue-collecting assembly (22). The multiple glue-collecting teeth (2211) are arranged in a one-to-one correspondence with the multiple through-groove (1213). The glue-collecting teeth (2211) can pass through the corresponding through-groove (1213).

7. The battery cell coating apparatus according to any one of claims 1 to 4, further comprising: Mounting base (3), on which the glue collection drive assembly (11) and the glue pressing drive assembly (21) are provided. The guide rail (4) is disposed on the mounting base (3). The guide rail (4) extends along the moving direction of the glue collection component (12) and the glue pressing component (22), and both the glue collection component (12) and the glue pressing component (22) move along the guide rail (4).

8. The battery cell coating apparatus according to any one of claims 1 to 4, wherein, The glue-collecting mechanism (1) and the glue-pressing mechanism (2) are provided at both ends of the battery cell (20) in the axial direction.

9. The battery cell coating apparatus according to any one of claims 1 to 4, further comprising: A clamping mechanism (5) is provided with a clamping groove (51), which is configured to clamp and fix the battery cell (20).

10. A method for coating a battery cell, applied to the battery cell coating apparatus according to any one of claims 1 to 9, the method comprising: The adhesive collection drive assembly (11) drives the adhesive collection assembly (12) to move toward the end face of the battery cell (20), so that the wall of the adhesive collection hole (1211) folds the adhesive paper (30) extending out of the end face of the battery cell (20) toward the center hole of the battery cell (20). The adhesive pressing drive assembly (21) drives the adhesive pressing assembly (22) to move toward the end face of the battery cell (20) so that the adhesive pressing assembly (22) passes through the adhesive receiving hole (1211) and presses the folded adhesive paper (30) onto the end face of the battery cell (20).

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