A copper powder smoothing device
By using the limiting and wiping components of the copper powder spreading device, the problem of annular protrusions caused by copper powder aggregation in the preparation of composite copper current collectors for lithium batteries was solved, achieving uniform spreading of copper powder and stability of product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YINGLIAN COMPOSITE FLUID COLLECTION CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-06-23
AI Technical Summary
During the preparation of composite copper current collectors for lithium batteries, copper powder at the edges is prone to forming annular protrusions and cracks during winding, leading to product scrap.
A copper powder spreading device was designed, including a limiting component, a wiping component, a pushing component, a buffer component, and a locking component. By using a combination of an electric push rod and a sponge, the device can limit the movement of the composite copper current collector, adjust the pressure, and buffer the impact, ensuring that the copper powder is spread evenly.
It effectively prevents copper particle aggregation, improves product quality consistency, reduces annular protrusions, simplifies sponge replacement operations, and reduces equipment downtime.
Smart Images
Figure CN224395026U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of copper powder spreading technology, specifically a copper powder spreading device. Background Technology
[0002] In the preparation process of composite copper current collectors used in lithium batteries, a nickel-chromium alloy underlayer and a copper seed layer are first magnetron sputtered on both sides of the polymer base film to form a magnetron layer. Subsequently, the metal layer is thickened to 1μm by electroplating. The surface of the prepared composite current collector is then subjected to anti-oxidation treatment, and finally the composite copper current collector is wound up.
[0003] When performing electroplating to thicken the metal layer, the electric field lines in the edge area of the conductive clamps on both sides are more concentrated as the current input points, resulting in a significantly higher local current density than other areas. The conductive clamps on both sides are also more prone to accumulating a large number of copper particles. These copper particles enter the anti-oxidation tank along with the composite current collector, resulting in a large amount of free copper powder in the tank. The copper powder adheres to the surface of the current collector. Although it is subsequently rinsed with cleaning solution, the copper powder is not effectively removed, and some copper particles are washed to the edge, causing continuous accumulation of copper particles at the edge of the current collector. This results in the residual copper particles on the film surface being carried to the winding end. As the winding length increases, the copper powder at the edge causes annular protrusions and ridges on the composite current collector on the winding roller during winding, ultimately leading to product scrap. Therefore, this invention provides a copper powder spreading device. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a copper powder spreading device, which solves the problem that as the winding length increases, the copper powder at the edge will develop annular protrusions and ridges on the composite current collector of the winding roller during winding, ultimately leading to product scrap.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a copper powder spreading device, comprising a mounting base, wherein a copper powder spreading mechanism for preparing lithium battery composite copper current collectors is provided on the mounting base, the copper powder spreading mechanism comprising:
[0006] The limiting component includes a support plate fixed to the upper surface of the mounting base, and fixed brackets are provided on both side walls of the support plate. A limiting roller shaft connected by a telescopic component is provided inside the fixed bracket.
[0007] The wiping assembly includes a mounting bracket fixed to the side wall of a support plate. The upper end of the mounting bracket is provided with an adjusting plate connected by a pushing assembly. The interior of the adjusting plate is provided with a connecting block connected by a buffer assembly. The outer wall of the connecting block is provided with a wiping sponge connected by a locking assembly.
[0008] Preferably, the upper end of the support plate is provided with a shaft-passing body, the left side of the shaft-passing body is provided with a guide roller, and the right side of the shaft-passing body is provided with a winding body. In the process of preparing the composite copper current collector for lithium batteries, during the process of the composite copper current collector moving from the anti-oxidation tank to the winding body 302, it is first guided out from the shaft-passing body 3 by the guide roller 301, passes through the limiting roller 204 and the copper powder spreading mechanism, and then is wound up by the winding body 302.
[0009] Preferably, the telescopic component includes a first electric push rod that is fixedly inserted through the inside of a fixed bracket. The telescopic end of the first electric push rod is fixed with a roller bracket. The limiting roller is located inside the roller bracket and is rotatably connected. According to the width and position requirements of the composite copper current collector, the first electric push rod can drive the limiting roller to adjust its orientation so that it can accurately limit the composite copper current collector and prevent it from deviating during movement.
[0010] Preferably, the push assembly includes a second electric push rod fixedly through the upper end of the mounting bracket. A push block is fixed to the telescopic end of the second electric push rod. Movable rods are provided on both sides of the push block and rotatably connected by a rotating shaft. Fixed rods are fixed to both side walls of the mounting bracket. The adjusting plate is located inside the fixed rods and rotatably connected by a rotating shaft. The other end of the movable rod is rotatably connected to the adjusting plate. The push assembly enables angle adjustment of the adjusting plate, controlling the pressure of the wiping sponge in contact with the film surface. The telescopic end of the second electric push rod can drive the push block to move horizontally on the mounting bracket. The push block pushes the adjusting plate to rotate around the rotating shaft on the fixed rod through the movable rod, thereby changing the angle of the adjusting plate and adjusting the contact pressure between the wiping sponge and the film surface.
[0011] Preferably, the buffer assembly includes a cavity groove inside the adjustment plate, with shock-absorbing springs evenly distributed at the top of the cavity groove. A buffer block is fixed to the other end of the shock-absorbing spring, and the buffer block is slidably connected to the inner wall of the cavity groove. A connecting block is fixedly connected to the lower end of the buffer block. A damping rod is provided on the inner ring of the shock-absorbing spring, and the damping rod is fixedly connected to the top of the cavity groove. When the wiping sponge contacts the composite copper current collector membrane surface and performs a smoothing operation, if the membrane surface is uneven or subjected to external impact, the wiping sponge will transmit the force to the connecting block and the buffer block.
[0012] Preferably, the engaging assembly includes a mounting housing that engages with the outer wall of the connecting block. Bolts are provided on both sides of the mounting housing. The wiping sponge is located at the lower end of the mounting housing. The mounting housing can be removed from the connecting block by loosening the bolts, and then the old wiping sponge can be removed and replaced.
[0013] Beneficial effects
[0014] This invention provides a copper powder spreading device. Compared with the prior art, it has the following advantages:
[0015] Firstly, this invention precisely controls the contact pressure between the wiping sponge and the film surface through a second electric push rod. This allows for flexible adjustment based on different production processes and product requirements, ensuring that the copper powder is evenly spread while preventing damage to the composite copper current collector due to excessive pressure. Furthermore, the design of two sets of adjustment plates makes the angle adjustment of the wiping sponge more flexible, better adapting to composite copper current collectors of different shapes and surfaces, thus improving the spreading effect. Then, the buffer block and shock-absorbing spring effectively buffer the impact force generated during wiping, protecting the composite copper current collector and the wiping sponge from damage. Simultaneously, it maintains a stable contact state between the wiping sponge and the film surface, ensuring the uniformity and consistency of the copper powder spreading. It can also spread copper particles at continuous copper particle aggregation points on the composite current collector, reducing the height of protrusions caused by particle aggregation and preventing annular protrusions and bursting of copper particles as the winding length increases.
[0016] Secondly, this invention activates the first electric push rod, whose telescopic end drives the roller support and the limiting roller to move horizontally, adjusting the position of the limiting roller to accurately limit the composite copper current collector, preventing it from shifting during movement. This allows it to adapt to composite copper current collectors of different widths and specifications, ensuring that it remains in the correct position throughout the manufacturing process, thus improving product quality and consistency. The use of snap-fit connections and bolt fixings makes the replacement of the wiping sponge simple and quick, requiring no special tools and reducing equipment downtime. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the main structure of the through-shaft of this utility model;
[0019] Figure 3 This is a schematic diagram of the adjustment plate connection structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of the adjustment plate of this utility model.
[0021] In the diagram: 1. Mounting base; 2. Support plate; 201. Fixed bracket; 202. First electric push rod; 203. Roller bracket; 204. Limiting roller; 3. Through shaft body; 301. Guide roller; 302. Rewinding body; 4. Mounting bracket; 401. Fixed rod; 402. Adjusting plate; 403. Second electric push rod; 404. Push block; 405. Movable rod; 5. Cavity groove; 501. Shock-absorbing spring; 502. Damping support rod; 503. Buffer block; 504. Connecting block; 505. Mounting shell; 506. Wiping sponge; 507. Bolt. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1-4 This utility model provides a technical solution: a copper powder spreading device, including a mounting base 1, on which a copper powder spreading mechanism for preparing lithium battery composite copper current collectors is provided, the copper powder spreading mechanism including:
[0024] The limiting component includes a support plate 2 fixed to the upper surface of the mounting base 1, and fixed brackets 201 are provided on both sides of the support plate 2. The fixed brackets 201 are provided with limiting rollers 204 connected by a telescopic component inside.
[0025] The wiping assembly includes a mounting bracket 4 fixed to the side wall of a support plate 2. An adjustment plate 402 connected to the upper end of the mounting bracket 4 via a push assembly is provided. A connecting block 504 connected via a buffer assembly is provided inside the adjustment plate 402. A wiping sponge 506 connected via a snap-fit assembly is provided on the outer wall of the connecting block 504.
[0026] In a preferred embodiment, the upper end of the support plate 2 is provided with a through-shaft body 3, the left side of the through-shaft body 3 is provided with a guide roller 301, and the right side of the through-shaft body 3 is provided with a winding body 302. During the preparation of the lithium battery composite copper current collector, the composite copper current collector moves from the anti-oxidation tank to the winding body 302. It is first guided out of the through-shaft body 3 by the guide roller 301, passes through the limiting roller 204 and the copper powder spreading mechanism, and is then wound up by the winding body 302.
[0027] In a preferred embodiment, the telescopic assembly includes a first electric push rod 202 fixedly inserted through the fixed bracket 201. A roller bracket 203 is fixed to the telescopic end of the first electric push rod 202. A limiting roller 204 is rotatably connected inside the roller bracket 203. According to the width and position requirements of the composite copper current collector, the first electric push rod 202 is activated. The telescopic end of the first electric push rod 202 drives the roller bracket 203 and the limiting roller 204 to move horizontally, adjusting the position of the limiting roller 204 so that it can accurately limit the composite copper current collector and prevent it from deviating during movement.
[0028] In a preferred embodiment, the push assembly includes a second electric push rod 403 fixed through the upper end of the mounting bracket 4. A push block 404 is fixed to the telescopic end of the second electric push rod 403. Movable rods 405 are provided on both sides of the push block 404 and are rotatably connected by a rotating shaft. Fixed rods 401 are fixed to both side walls of the mounting bracket 4. An adjusting plate 402 is located inside the fixed rod 401 and is rotatably connected by a rotating shaft. The other end of the movable rod 405 is rotatably connected to the adjusting plate 402. Two sets of adjusting plates 402 are provided. The angle of the adjusting plates 402 can be adjusted by the push assembly to control the pressure of the wiping sponge 506 in contact with the film surface.
[0029] Furthermore, when it is necessary to adjust the contact pressure between the wiping sponge 506 and the composite copper current collector membrane, the second electric push rod 403 is activated. The telescopic end of the second electric push rod 403 drives the push block 404 to move horizontally on the mounting bracket 4. The push block 404 pushes the adjusting plate 402 to rotate around the rotating shaft on the fixed rod 401 through the movable rod 405, thereby changing the angle of the adjusting plate 402 and thus adjusting the contact pressure between the wiping sponge 506 and the membrane surface.
[0030] In a preferred embodiment, the buffer assembly includes a cavity groove 5 opened inside the adjusting plate 402. Shock-absorbing springs 501 are evenly distributed at the top of the cavity groove 5. A buffer block 503 is fixed to the other end of the shock-absorbing spring 501. The buffer block 503 is slidably connected to the inner wall of the cavity groove 5. A connecting block 504 is fixedly connected to the lower end of the buffer block 503. A damping support rod 502 is provided in the inner ring of the shock-absorbing spring 501, and the damping support rod 502 is fixedly connected to the top of the cavity groove 5. When the wiping sponge 506 contacts the composite copper current collector film surface and performs a smoothing operation, if the film surface is uneven or subjected to external impact, the wiping sponge 506 will transmit the force to the connecting block 504 and the buffer block 503.
[0031] Specifically, the buffer block 503 slides within the cavity groove 5, compressing the shock-absorbing spring 501. The shock-absorbing spring 501 absorbs and disperses the impact force through elastic deformation. At the same time, the damping support rod 502 plays a damping role, reducing the vibration of the spring and enabling the wiping sponge 506 to maintain a stable pressure and contact state.
[0032] In a preferred embodiment, the snap-fit assembly includes a mounting housing 505 that snaps into the outer wall of the connecting block 504. Bolts 507 are provided on both sides of the mounting housing 505. The wiping sponge 506 is located at the lower end of the mounting housing 505. When the wiping sponge 506 needs to be replaced, the bolts 507 are loosened, the mounting housing 505 is removed from the connecting block 504, the old wiping sponge 506 is removed, a new wiping sponge 506 is installed, the mounting housing 505 is snapped back into the connecting block 504, and the bolts 507 are tightened. The snap-fit connection and bolt fixing method make the replacement of the wiping sponge 506 simple and quick, without the need for professional tools, thus reducing equipment downtime.
[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0034] During the operation of the copper powder spreading device, the composite copper current collector moves from the anti-oxidation tank through the guide roller 301 and the limiting roller 204 to the shaft body 3. The copper powder is spread evenly at the shaft body 3, and then passes through another set of limiting roller 204, and finally is wound up by the winding body 302. First, the limiting component starts working. According to the width and position requirements of the composite copper current collector, the first electric push rod 202 inside the fixed bracket 201 is activated. Its telescopic end drives the roller bracket 203 and the internally rotatably connected limiting roller 204 to move horizontally and adjust to a suitable position to accurately limit the current collector and prevent it from deviating during the movement.
[0035] Subsequently, the wiping assembly begins to operate. When it is necessary to adjust the contact pressure between the wiping sponge 506 and the current collector membrane surface, the second electric push rod 403 at the upper end of the mounting bracket 4 is activated. Its telescopic end drives the push block 404 to move horizontally. The push block 404 pushes the adjusting plate 402 to rotate around the rotating shaft on the fixed rod 401 through the movable rods 405 on both sides, thereby realizing the angle adjustment of the two sets of adjusting plates 402 and thus changing the contact pressure of the wiping sponge 506.
[0036] During the smoothing operation, if the composite copper current collector film surface is uneven or subjected to external impact, the wiping sponge 506 transmits force to the connecting block 504 and the buffer block 503. The buffer block 503 slides in the cavity groove 5 of the adjusting plate 402 and compresses the shock-absorbing spring 501. The shock-absorbing spring 501 absorbs the impact force through elastic deformation, while the damping support rod 502 reduces spring vibration, ensuring that the wiping sponge 506 maintains a stable pressure and contact state. When it is necessary to replace the wiping sponge 506, loosen the bolts 507 on both sides of the mounting shell 505, remove the mounting shell 505 from the connecting block 504, replace the new wiping sponge 506, re-lock the mounting shell 505 and tighten the bolts 507 to complete the operation.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A copper powder spreading device, comprising a mounting base (1), characterized in that: The mounting base (1) is provided with a copper powder spreading mechanism for preparing lithium battery composite copper current collectors. The copper powder spreading mechanism includes: The limiting component includes a support plate (2) fixed to the upper surface of the mounting base (1), and fixed brackets (201) are provided on both sides of the support plate (2). A limiting roller (204) connected by a telescopic component is provided inside the fixed bracket (201). The wiping assembly includes a mounting bracket (4) fixed to the side wall of a support plate (2). The upper end of the mounting bracket (4) is provided with an adjusting plate (402) connected by a pushing assembly. The interior of the adjusting plate (402) is provided with a connecting block (504) connected by a buffer assembly. The outer wall of the connecting block (504) is provided with a wiping sponge (506) connected by a snap-fit assembly.
2. The copper powder spreading device according to claim 1, characterized in that: The upper end of the support plate (2) is provided with a shaft body (3), a guide roller (301) is provided on the left side of the shaft body (3), and a winding body (302) is provided on the right side of the shaft body (3).
3. The copper powder spreading device according to claim 2, characterized in that: The telescopic assembly includes a first electric push rod (202) that is fixed through the inside of a fixed bracket (201), and a roller bracket (203) is fixed to the telescopic end of the first electric push rod (202).
4. The copper powder spreading device according to claim 3, characterized in that: The limiting roller (204) is located inside the roller support (203) and is rotatably connected.
5. The copper powder spreading device according to claim 4, characterized in that: The jacking assembly includes a second electric push rod (403) fixed through the upper end of the mounting bracket (4), and a push block (404) is fixed to the telescopic end of the second electric push rod (403). Movable rods (405) are provided on both sides of the push block (404) and are rotatably connected by a rotating shaft.
6. The copper powder spreading device according to claim 5, characterized in that: The mounting bracket (4) has two fixed rods (401) on its two side walls. The adjusting plate (402) is located inside the fixed rods (401) and is rotatably connected by a rotating shaft. The other end of the movable rod (405) is rotatably connected to the adjusting plate (402).
7. The copper powder spreading device according to claim 6, characterized in that: The buffer assembly includes a cavity groove (5) inside the adjusting plate (402). Shock-absorbing springs (501) are evenly distributed at the top of the cavity groove (5). A buffer block (503) is fixed to the other end of the shock-absorbing spring (501). The buffer block (503) is slidably connected to the inner wall of the cavity groove (5). The connecting block (504) is fixedly connected to the lower end of the buffer block (503).
8. The copper powder spreading device according to claim 7, characterized in that: The inner ring of the shock-absorbing spring (501) is provided with a damping support rod (502), and the damping support rod (502) is fixedly connected to the top of the cavity groove (5).
9. The copper powder spreading device according to claim 1, characterized in that: The engaging assembly includes a mounting housing (505) that engages with the outer wall of the connecting block (504), and bolts (507) are provided on both sides of the mounting housing (505).
10. A copper powder spreading device according to claim 9, characterized in that: The wiping sponge (506) is located at the lower end of the mounting housing (505).