A kind of battery pole piece coating roll press is scraped roll device

Abstract

The utility model relates to a kind of battery pole piece coating roll press is used to scrape roll device, including frame, upper press roll, lower press roll and pole piece, the upper press roll, lower press roll outside is separately provided with scraper device, the scraper device includes the scraper mechanism, wiping mechanism and blow-drying mechanism that are sequentially arranged;The both ends of the scraper mechanism, wiping mechanism and blow-drying mechanism are respectively rotated by first pivot and frame connection;The scraper mechanism, wiping mechanism and blow-drying mechanism are respectively controlled independently by gas rod;Device is through the three-section type combination design of scraper mechanism, wiping mechanism, blow-drying mechanism, realizes the progressive cleaning process of physical scraping, infiltration wiping, air dry residual.

Description

Technical Field

[0001] This utility model belongs to the field of battery electrode technology, specifically relating to a scraper device for a battery electrode coating roller press. Background Technology

[0002] In battery manufacturing, the rolling effect of the electrode is crucial. After coating, the coating adheres to the surface of the current collector. At this stage, the gaps between the coating molecules on the electrode are large, and the ions travel a long distance, affecting the battery's electrical performance. However, after the rolling process, the electrode is squeezed by the pressure rollers, compressing the coating thickness, shortening the ion channel distance, and improving electrical performance.

[0003] In the actual electrode rolling process, due to different electrode coating ratios, the adhesion between the coating and the current collector varies. Some coatings have a low binder content, resulting in weak adhesion. During rolling, some coatings detach and adhere to the roller surface. This phenomenon is called roller sticking, and it is particularly noticeable during negative electrode rolling. On the one hand, the electrical properties of the electrode with detached coating are affected; on the other hand, the coating adhering to the roller after rolling affects the roller surface flatness, damaging the thickness, appearance, and interface of the subsequently rolled electrode. Therefore, the rollers in the rolling process are equipped with scrapers to remove the adhered coating.

[0004] Traditional scrapers are simple blades that can remove larger coating particles from the pressure rollers. However, because the electrode coating contains small particles, these particles also adhere to the pressure rollers after rolling. Traditional scrapers cannot solve this problem and can only be addressed by manually wiping with alcohol after periodic shutdowns. On one hand, shutdowns result in lost production capacity, and the evaporation of alcohol from the roller surface after wiping cannot be guaranteed. Residual alcohol can damage the electrodes, affecting product yield. On the other hand, since manual wiping is performed periodically, the cleanliness of the roller surface is inconsistent within the cleaning cycle, leading to inconsistent grayscale values ​​on the surface of the rolled electrodes, posing a risk of misjudgment in the later CCD defect identification process. Summary of the Invention

[0005] The purpose of this utility model is to provide a scraper device for a battery electrode coating roller press, which mainly solves the problems caused by the poor removal effect of traditional scrapers on small particles on the roller surface and the increased production capacity loss and yield risk due to manual wiping with alcohol.

[0006] The purpose of this utility model is achieved as follows: a scraper device for a battery electrode coating roller press includes a frame, an upper pressure roller, a lower pressure roller and an electrode. Scraper devices are respectively arranged on the outer side of the upper pressure roller and the lower pressure roller. The scraper device includes a scraper mechanism, a wiping mechanism and a drying mechanism arranged in sequence.

[0007] The two ends of the scraper mechanism, wiping mechanism and drying mechanism are rotatably connected to the frame via the first rotating shaft.

[0008] Each mechanism can be opened and closed quickly via the first rotating shaft, and the entire machine can be disassembled when changing the wiping cloth or performing maintenance.

[0009] The scraper mechanism, wiping mechanism, and drying mechanism are each independently controlled by a pneumatic rod.

[0010] The wiping mechanism includes a substrate, and a second rotating shaft is provided at the lower end of the substrate. The surface of the second rotating shaft is covered with a wiping cloth.

[0011] The substrate has uniformly arranged liquid outlet holes inside, and the positions of the liquid outlet holes correspond to those of the wiping cloth.

[0012] The substrate has a liquid injection hole on its outer side.

[0013] The drying mechanism includes air ducts that are evenly distributed along the drying mechanism.

[0014] A compressed air inlet is provided on the outside of the drying mechanism.

[0015] The beneficial effects of this invention are as follows: Through a three-stage combined design of a scraper mechanism, a wiping mechanism, and a drying mechanism, a progressive cleaning process is achieved, consisting of physical scraping, immersion wiping, and air drying to remove residue. The scraper prioritizes removing large particles of residue, the wiping cloth is soaked in cleaning fluid to deeply dissolve small particles, and finally, compressed air thoroughly dries the residue, preventing electrode contamination or roller surface corrosion caused by residual substances. Each mechanism is driven by an independent air rod, allowing for dynamic adjustment of scraper pressure, wiping cloth immersion volume, and drying air speed according to different electrode properties or coating characteristics. The wiping mechanism has a built-in liquid outlet and injection hole forming a closed-loop liquid supply system, ensuring that the cleaning fluid evenly penetrates the entire wiping cloth, avoiding the localized drying problems caused by traditional manual liquid replenishment. The drying mechanism adopts an array-type air duct layout, where compressed air is rectified to form a laminar flow air curtain, covering the upper and lower pressure rollers completely without dead angles. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of a scraper device for a battery electrode coating roller press according to the present invention.

[0017] Figure 2 This is another structural view of the scraper device for a battery electrode coating roller press according to this utility model.

[0018] Figure 3 This is a structural diagram of the wiping mechanism of a scraper device for a battery electrode coating roller press according to the present invention.

[0019] Figure 4This is a structural diagram of the drying mechanism of a scraper roller device for a battery electrode coating roller press according to the present invention.

[0020] In the diagram: 1. Frame; 2. Upper pressure roller; 3. Lower pressure roller; 4. Electrode sheet;

[0021] 501. Scraper mechanism; 502. Wiping mechanism; 503. Drying mechanism; 504. Air rod; 505. First rotating shaft; 5021. Substrate; 5022. Second rotating shaft; 5023. Wiping cloth; 5024. Liquid outlet; 5025. Liquid injection hole; 5031. Air duct; 5032. Compressed air inlet. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0023] like Figures 1-4 As shown, a scraper device for a battery electrode coating roller press includes a frame 1, an upper pressure roller 2, a lower pressure roller 3 and an electrode 4. Scraper devices are respectively arranged on the outer sides of the upper pressure roller 2 and the lower pressure roller 3. The scraper device includes a scraper mechanism 501, a wiping mechanism 502 and a drying mechanism 503 arranged in sequence.

[0024] The scraper mechanism 501, wiping mechanism 502, and drying mechanism 503 are rotatably connected to the frame 1 at both ends via the first rotating shaft 505. Each mechanism can be quickly opened and closed via the first rotating shaft 505, and the entire machine can be installed without disassembling when replacing the wiping cloth 5023 or for maintenance.

[0025] The scraper mechanism 501, wiping mechanism 502, and drying mechanism 503 are each independently controlled by an air spring 504. The air spring 504 can control the distance between each mechanism and the upper pressure roller 2 and the lower pressure roller 3 to achieve the best performance.

[0026] In use, the present invention controls the scraper mechanism 501 to contact the upper pressure roller 2 and the lower pressure roller 3 through the air rod 504 to peel off larger dressing particles from the roller surface; then the air rod 504 drives the wiping mechanism 502 to clean the small particles on the roller surface; finally, the drying mechanism 503 evaporates the residual alcohol on the roller surface to avoid contaminating the electrode.

[0027] Through structural innovation and functional integration, the device effectively solves pain points in the lithium battery electrode coating process, such as incomplete roller surface cleaning, residual liquid contamination, and complex maintenance. Its compact structure and convenient maintenance, along with the ability to adjust or replace individual components, improve production efficiency and reduce downtime for maintenance. Example 2

[0028] like Figures 1-4As shown, a scraper device for a battery electrode coating roller press includes a frame 1, an upper pressure roller 2, a lower pressure roller 3 and an electrode 4. Scraper devices are respectively arranged on the outer sides of the upper pressure roller 2 and the lower pressure roller 3. The scraper device includes a scraper mechanism 501, a wiping mechanism 502 and a drying mechanism 503 arranged in sequence.

[0029] Furthermore, the two ends of the scraper mechanism 501, wiping mechanism 502, and drying mechanism 503 are rotatably connected to the frame 1 via the first rotating shaft 505. Each mechanism can be quickly opened and closed via the first rotating shaft 505, and the entire machine does not need to be disassembled when replacing the wiping cloth 5023 or for maintenance.

[0030] Furthermore, the scraper mechanism 501, wiping mechanism 502, and drying mechanism 503 are each independently controlled by a pneumatic rod 504. The pneumatic rod 504 can control the distance between each mechanism and the upper pressure roller 2 and the lower pressure roller 3 to achieve the best performance.

[0031] Furthermore, the wiping mechanism 502 includes a substrate 5021, a second rotating shaft 5022 is provided at the lower end of the substrate 5021, and the surface of the second rotating shaft 5022 is covered with a wiping cloth 5023.

[0032] Furthermore, the substrate 5021 is uniformly provided with liquid outlet holes 5024, the positions of which correspond to those of the wiping cloth 5023. The cleaning solution can be evenly applied to the wiping cloth 5023 through the liquid outlet holes 5024.

[0033] Furthermore, a liquid injection hole 5025 is provided on the outer side of the substrate 5021. The liquid injection hole 5025 can replenish the cleaning fluid inside the wiping mechanism 502.

[0034] Furthermore, the drying mechanism 503 includes an air duct 5031, which is evenly distributed along the drying mechanism.

[0035] Furthermore, a compressed air inlet 5032 is provided on the outer side of the drying mechanism 503. Compressed air enters the drying mechanism 503 through the compressed air inlet 5032, and then is evenly blown onto the roller surface from the air duct 5031.

[0036] In this invention, the air rod 504 controls the scraper mechanism 501 to contact the upper pressure roller 2 and the lower pressure roller 3 to peel off larger dressing particles from the roller surface; then the air rod 504 drives the wiping mechanism 502 to clean the small particles on the roller surface; finally, the drying mechanism 503 evaporates the residual alcohol on the roller surface to avoid contaminating the electrode.

[0037] In practical use, the air spring 504 controls the scraper mechanism 501 to rotate around the first rotating shaft 505, thereby adjusting the distance between the scraper mechanism 501 and the roller surface. In the wiping mechanism 502, the substrate 5021 injects alcohol through the injection hole 5025, and the alcohol is evenly permeated into the wiping cloth 5023 through the outlet hole 5024, keeping the wiping cloth 5023 moist and enhancing the cleaning effect. The second rotating shaft 5022 allows the wiping cloth 5023 to continuously contact the roller surface while rotating, and it can also rotate itself to maintain the clean surface of the wiping cloth 5023, or to facilitate the replacement of the wiping cloth 5023. In the drying mechanism 503, compressed air is evenly blown through the air duct 5031 to the upper pressure roller 2 and the lower pressure roller 3 to quickly dry the residual alcohol and prevent alcohol residue from affecting subsequent processing or causing corrosion.

[0038] Through structural innovation and functional integration, the device effectively solves pain points in the lithium battery electrode coating process, such as incomplete roller surface cleaning, residual liquid contamination, and complex maintenance. Its compact structure and convenient maintenance, along with the ability to adjust or replace individual components, improve production efficiency and reduce downtime for maintenance.

Claims

1. A scraper roller device for a battery electrode coating roller press, comprising a frame, an upper pressure roller, a lower pressure roller, and electrode sheets, characterized in that: The upper and lower pressure rollers are respectively provided with scraper devices on their outer sides. The scraper devices include a scraper mechanism, a wiping mechanism and a drying mechanism arranged in sequence.

2. The scraper roller device for a battery electrode coating roller press according to claim 1, characterized in that: The two ends of the scraper mechanism, wiping mechanism and drying mechanism are rotatably connected to the frame via the first rotating shaft.

3. The scraper roller device for a battery electrode coating roller press according to claim 2, characterized in that: The scraper mechanism, wiping mechanism, and drying mechanism are each independently controlled by a pneumatic rod.

4. The scraper roller device for a battery electrode coating roller press according to claim 1, characterized in that: The wiping mechanism includes a substrate, and a second rotating shaft is provided at the lower end of the substrate. The surface of the second rotating shaft is covered with a wiping cloth.

5. The scraper roller device for a battery electrode coating roller press according to claim 4, characterized in that: The substrate has uniformly arranged liquid outlet holes inside, and the positions of the liquid outlet holes correspond to those of the wiping cloth.

6. The scraper roller device for a battery electrode coating roller press according to claim 5, characterized in that: The substrate has a liquid injection hole on its outer side.

7. The scraper roller device for a battery electrode coating roller press according to claim 1, characterized in that: The drying mechanism includes air ducts that are evenly distributed along the drying mechanism.

8. The scraper roller device for a battery electrode coating roller press according to claim 7, characterized in that: A compressed air inlet is provided on the outside of the drying mechanism.

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