A cleaning and wiping device for an electrode roll press

Abstract

This invention discloses a cleaning and wiping device for an electrode roller press. The device comprises a hard scraper assembly, a soft scraper assembly, and a receiving and isolating disc. The hard scraper assembly is in close contact with the roller surface, and its main function is to remove excess slurry. The soft scraper assembly contacts the roller surface, and its function is to remove residual substances from the roller surface. Furthermore, the device includes a receiving and isolating disc located between the electrode and the roller surface, which isolates the contact area between the electrode and the roller surface and receives excess slurry and residual substances falling from the electrode. This invention achieves multi-stage cleaning of the roller. The hard scraper effectively scrapes away excess slurry adhering to the roller, the soft scraper further removes remaining deposits, and the roller wiping component wipes away any remaining adhesive substances. Compared to a single cleaning method, the cleaning efficiency and electrode roller pressing quality are significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cleaning and wiping of electrode roller presses, and in particular to a cleaning and wiping device for electrode roller presses. Background Technology

[0002] Lithium-ion batteries are widely used in numerous fields due to their advantages such as high energy density, low self-discharge rate, long cycle life, and absence of memory effect. They play a crucial role in consumer electronics, powering devices such as mobile phones and laptops. In electric vehicles, lithium-ion batteries provide powerful performance. Energy storage systems utilize lithium-ion batteries to balance grid supply and demand. Furthermore, in the aerospace field, lithium-ion batteries meet the high energy density requirements of devices.

[0003] Currently, the production process of lithium-ion batteries mainly includes: first, mixing and stirring various ingredients to form a slurry, and then uniformly coating it onto a current collector. After drying and rolling, the material is cut into electrode sheets. Next, the sheets are assembled into cells by winding or stacking, and electrolyte is injected. After that, they undergo encapsulation, formation, and aging treatments. After a series of rigorous tests, the final product, a lithium-ion battery, is obtained.

[0004] The production process of lithium-ion batteries mainly includes key steps such as stirring, coating, and rolling. Among these steps, the rolling process is particularly critical. Rolling applies pressure to the coated electrode sheet, effectively reducing its porosity and increasing its compaction density. This step is crucial for improving the battery's volumetric energy density. It enhances the contact between the electrode material and the current collector, thereby improving the battery's conductivity and cycle stability, ensuring the overall quality and reliability of the battery. For example, batteries that have undergone fine rolling treatment can transfer charge more efficiently during charging and discharging, significantly reducing energy loss due to internal resistance.

[0005] However, during the rolling process of lithium-ion batteries, roller sticking may occur. This phenomenon has various causes, including uneven distribution of the slurry on the electrode surface, insufficient or poor-performing binder in the slurry formulation, and excessive rolling pressure. Roller sticking causes electrode material to adhere to the roller surface, which not only affects the uniformity of electrode thickness, leading to fluctuations in battery performance, but may also cause surface damage, affecting the battery's cycle life and safety. Simultaneously, it reduces production efficiency and increases cleaning and maintenance costs. For example, inconsistent electrode thickness can lead to varying degrees of reaction in different parts of the battery during charging and discharging, thus affecting the overall capacity and lifespan of the battery.

[0006] For example, utility model CN218171521U discloses a cleaning mechanism for the pressure roller of a lithium battery electrode rolling mill. Using this solution, during the operation of the pressure roller, a linkage drives a wiping roller to rotate in the opposite direction to the pressure roller's surface, wiping it in real time. When the wiping roller's surface wears down from prolonged wiping or accumulates excessive dust, the connecting piece restricting the wiping roller can be removed for replacement, greatly improving wiping efficiency, saving labor, and offering convenient operation. However, this solution has drawbacks: it is difficult to remove stubborn slurry, the pressure roller is not thoroughly cleaned, and the problem of roller sticking still occurs.

[0007] For the reasons mentioned above, there is a need for a cleaning and wiping device for electrode roll forming machines that can efficiently clean the roller surface, ensuring that electrode material does not adhere to it during the rolling process. This would improve production efficiency, guarantee consistent product quality, and reduce labor costs. It could also extend equipment life, enhance production safety, and increase process controllability. Utility Model Content

[0008] To address the aforementioned problems, the purpose of this utility model is to provide a cleaning and wiping device for an electrode roller press, which can quickly and thoroughly clean and wipe the rollers of the roller press.

[0009] The objective of this utility model can be achieved through the following technical solution: a cleaning and wiping device for an electrode roll press, comprising:

[0010] A hard scraper is attached to the surface of the pressure roller to scrape off excess slurry, and the gap between the hard scraper and the pressure roller surface is adjustable.

[0011] A soft scraper component, which contacts the surface of the pressure roller and is used to scrape off any remaining deposits on the surface of the pressure roller;

[0012] The receiving and separating disc is located between the electrode sheet and the pressure roller surface. It is used to separate the electrode sheet area from the pressure roller surface area, or to receive and scrape off excess slurry and adhering substances.

[0013] Among them, hard scraper components and soft scraper components are arranged sequentially along the rotation direction of the pressure roller.

[0014] As a further embodiment of this utility model, the soft scraper includes:

[0015] The adsorption element, located above the soft scraper, is used to absorb the slurry particles and dust generated during the scraping of residual deposits.

[0016] As a further improvement of this utility model, it also includes:

[0017] The roller wiping component is arranged behind the soft scraper component along the rotation direction of the pressure roller and is used to wipe away any remaining adhesive material on the surface of the pressure roller.

[0018] As a further embodiment of this utility model, the roller wiping component includes:

[0019] A spray element, located in front of the wiping roller shaft, includes multiple high-pressure nozzles for spraying cleaning liquid.

[0020] As a further improvement of this invention, each high-pressure nozzle is connected to a liquid inlet pipe and an air inlet pipe.

[0021] As a further improvement of this utility model, it also includes:

[0022] The air-blowing drying component is arranged behind the roller wiping component along the rotation direction of the pressure roller, and is used to blow dry the surface of the pressure roller after wiping.

[0023] As a further embodiment of this utility model, the roller wiping component includes a wiping roller, and the wiping surface of the wiping roller is made of carbon fiber or PET fiber.

[0024] As a further improvement of this utility model, it also includes:

[0025] The work protective cover is used to house the pressure roller and the various components of the cleaning and wiping device, forming a relatively independent cleaning and wiping environment.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model achieves multi-stage cleaning of the pressure roller through the combined use of a hard scraper, a soft scraper, a roller wiping component, and a spray component. The hard scraper effectively removes excess slurry adhering to the pressure roller, the soft scraper further removes remaining deposits, the roller wiping component removes remaining deposits using the wiping surface material and reverse motion, and the spray component assists in cleaning by spraying a gas-liquid mixture of cleaning fluid. This multi-stage cleaning method ensures a clean surface on the pressure roller, significantly improving cleaning efficiency and quality compared to a single cleaning method.

[0028] 2. The hard scraper of this utility model is made of high-strength alloy steel and equipped with a precise adjustment mechanism, which can accurately control the gap and angle with the pressure roller, effectively dealing with excess slurry adhering to the pressure roller and avoiding the phenomenon of sticking to the roller due to slurry residue; the soft scraper is made of wear-resistant rubber material, which is in close contact with the pressure roller and can scrape off the remaining adhering substances on the surface of the pressure roller without damaging the surface of the pressure roller. The targeted cleaning design further improves the cleaning effect.

[0029] 3. The isolation disc of this utility model effectively separates the pressure roller cleaning and wiping area from the electrode area, preventing excess slurry and deposits generated during the cleaning and wiping process from entering the electrode area, thereby avoiding contamination of the electrode surface, ensuring the quality of the electrode, and thus guaranteeing the overall performance and quality of the lithium-ion battery.

[0030] 4. This utility model avoids problems such as inconsistent electrode thickness caused by residues on the surface of the pressure roller by efficiently cleaning the surface of the pressure roller. This allows the electrode to maintain good consistency during the rolling process, reducing the uneven reaction of different parts of the battery during charging and discharging, thereby reducing the fluctuation of the overall battery capacity and lifespan and improving the stability of product quality. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the cleaning and wiping device for an electrode roll press according to the present invention;

[0032] Figure 2 This is a partial structural schematic diagram of the cleaning and wiping device of this utility model;

[0033] Figure 3 This is a schematic diagram of the installation and arrangement of the high-pressure nozzle of this utility model.

[0034] 100. Hardened scraper component; 110. Hardened scraper base; 120. Hardened scraper;

[0035] 200. Soft scraper component; 210. Adsorption component; 220. Soft scraper base; 230. Soft scraper;

[0036] 300. Roller wiping component; 310. Spraying component; 320. Wiping roller; 330. High-pressure nozzle; 340. Liquid inlet pipe; 350. Air inlet pipe;

[0037] 400. Air-blowing drying component; 410. Air-blowing surface;

[0038] 500, Isolation receiving tray; 510, Upper isolation receiving tray; 520, Middle isolation tray; 530, Lower isolation receiving tray;

[0039] 600. Work protective cover;

[0040] 710. Upper pressure roller; 720. Lower pressure roller;

[0041] 800, Electrode. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] This utility model discloses a cleaning and wiping device for an electrode roller press.

[0044] Example 1:

[0045] like Figure 1 As shown, the cleaning and wiping device for the electrode roller press includes components such as a hard scraper 100, a soft scraper 200, and a receiving and isolating disc 500.

[0046] The roller press includes an upper roller 710 and a lower roller 720. The electrode 800 passes between the upper roller 710 and the lower roller 720. The upper roller 710 and the lower roller 720 move towards each other. The roller press applies pressure to the coated electrode 800, reducing the coating porosity of the electrode 800 and increasing the compaction density.

[0047] The upper pressure roller 710 and the lower pressure roller 720 are respectively equipped with components such as a hard scraper 100, a soft scraper 200, and a receiving isolation disc 500. The hard scraper 100 and the soft scraper 200 are arranged sequentially along the rotation direction of the pressure rollers. Wherein:

[0048] The hard scraper component 100 includes a hard scraper base 110 and a hard scraper 120, etc. The hard scraper base 110 is fixed on the device bracket, and the hard scraper 120 is installed on the hard scraper base 110, which makes it easy to maintain and replace the hard scraper 120.

[0049] A hard scraper 120 is attached to the surface of the pressure roller along the axial direction to scrape off excess slurry adhering to the roller. The hard scraper 120 can be made of high-strength alloy steel. Through a precise adjustment mechanism, the gap and angle between the hard scraper 120 and the pressure roller can be controlled. During the rolling process, the hard scraper 120 can scrape off excess slurry from the surface of the pressure roller in real time.

[0050] Furthermore, the hard scraper 100 is also equipped with a cleaning system that can periodically clean the hard scraper 120 to prevent slurry residue from affecting the performance of the hard scraper 120.

[0051] The soft scraper component 200 includes a soft scraper base 220 and a soft scraper 230. The soft scraper base 220 is fixed on the device bracket, and the soft scraper 230 is installed on the soft scraper base 220, which allows for convenient maintenance and replacement of the soft scraper 230.

[0052] The soft scraper 230 can be made of wear-resistant rubber or other materials and its shape matches the surface of the roller of the roller press. During the roller pressing process, the scraper is in close contact with the roller and scrapes off the remaining adhering material on the surface of the roller.

[0053] Furthermore, the soft scraper 200 also includes an adsorption element 210, which is located above the soft scraper 230. A negative pressure is formed at the opening of the particle adsorption tube to absorb the slurry particles or dust generated when scraping off the remaining attached material, thus avoiding the impact of slurry particles and dust on the quality of the electrode products.

[0054] Furthermore, a protective cover 600 is provided on the outside of the pressure roller, the hard scraper 100, and the soft scraper 200. The protective cover 600 is fixed on the device support. The protective cover 600 contains the pressure roller, as well as the various components of the device such as the hard scraper 100 and the soft scraper 200. The protective cover 600 forms a relatively closed environment, which can protect the operators and also form a relatively independent cleaning and wiping environment.

[0055] Furthermore, a receiving isolation plate 500 is provided between the pressure roller and the electrode sheet 800. The receiving isolation plate 500 is divided into an upper receiving isolation plate 510, a middle isolation plate 520, and a lower receiving plate 530, wherein:

[0056] The upper receiving isolation plate 510 is located above the electrode 800. The outer edge of the upper receiving isolation plate 510 can be connected to the inner surface of the work protective cover 600. The inner edge of the upper receiving isolation plate 510 maintains a certain gap with the upper pressure roller 710. By setting the upper receiving isolation plate 510, excess slurry and adhering substances that fall off during the cleaning and wiping of the upper pressure roller 710 can be received. It can also distinguish the cleaning and wiping area of ​​the upper pressure roller 710 from the area of ​​the electrode 800, preventing excess slurry and adhering substances generated during cleaning and wiping from entering the area of ​​the electrode 800 and thus affecting the quality of the electrode 800.

[0057] The middle isolation disc 520 is located below the electrode 800. The outer edge of the middle isolation disc 520 can be connected to the inner surface of the work protective cover 600. The inner edge of the middle isolation disc 520 maintains a certain gap with the pressure roller. By setting the middle isolation disc 520, the cleaning and wiping area of ​​the lower pressure roller 720 can be distinguished from the electrode 800 area, preventing excess slurry and deposits generated during cleaning and wiping from entering the electrode 800 area and thus affecting the quality of the electrode 800.

[0058] The lower receiving plate 530 is located below the lower pressure roller 720. The lower receiving plate 530 can be an integral structure. The outer edge of the lower receiving isolation plate 500 can be connected to the inner surface of the work protective cover 600. By setting the lower receiving isolation plate 500, excess slurry and adhering substances that fall off during the cleaning and wiping of the lower pressure roller 720 can be received.

[0059] Example 2:

[0060] like Figure 2 As shown, based on Embodiment 1, it also includes a roller wiping component 300 and a blower drying component 400. The roller wiping component 300 includes components such as a wiping roller 320 and a spraying component 310.

[0061] The wiping surface of the wiping roller 320 can be made of carbon fiber or PET fiber to form a wiping velvet surface or a fine brush surface. The wiping surface of the wiping roller 320 is in close contact with the pressure roller surface. The wiping roller 320 is driven to move in the opposite direction to the pressure roller, and uses the wiping surface to roll and wipe the pressure roller surface to remove the remaining adhesive on the pressure roller surface.

[0062] Furthermore, the roller wiping component 300 also includes a spraying component 310, such as... Figure 3 As shown, the spray component 310 is located in front of the wiping roller shaft 320 and includes multiple high-pressure nozzles 330. Each high-pressure nozzle 330 is connected to a liquid inlet pipe 340 and an air inlet pipe 350. The high-pressure nozzles 330 are used to spray a gas-liquid mixture of cleaning fluid.

[0063] The spray component 310 sprays the mixed fluid onto the pressure roller surface to assist in cleaning the pressure roller surface. The mixed fluid adopts gas-liquid mixing. Multiple high-pressure nozzles 330 are set above the pressure roller surface. Each high-pressure nozzle 330 is connected to a liquid inlet pipe 340 and an air inlet pipe 350 to mix the incoming cleaning liquid and high-pressure gas to form a gas-liquid mixed fluid.

[0064] The gas-liquid mixture is formed by mixing cleaning liquid and high-pressure gas. The bubbles and droplets in this gas-liquid mixture can interact to generate flow, resulting in better cleaning effect. When sprayed onto the pressure roller surface by the high-pressure nozzle 330, bubbles and liquid droplets are formed. The momentum, impact and shear force of the bubbles and droplets reach the pressure roller surface and impact the remaining adhesive on the pressure roller surface to remove the adhesive and play an auxiliary cleaning role. At the same time, the cleaning liquid can penetrate into the adhesive more quickly to achieve the effect of wetting and cleaning. The auxiliary wiping roller 320 uses the wiping surface to clean and wipe.

[0065] Furthermore, it also includes a blower drying component 400, which is arranged behind the roller wiping component 300 along the rotation direction of the pressure roller, and is used to blow dry the surface of the pressure roller after wiping.

[0066] The air-blowing drying unit 400 includes a blowing surface 410 arranged along the axial direction of the pressure roller. The gas blown out by the blowing surface 410 quickly dries the pressure roller surface, thus achieving rapid drying. Furthermore, a heating element can be configured in the air-blowing drying unit 400 to heat the blown gas, thereby improving drying efficiency. Simultaneously, the design of the air-blowing drying unit 400 considers energy conservation and environmental protection. Through an intelligent control system, the blowing intensity and temperature are automatically adjusted according to the humidity of the pressure roller surface, ensuring that energy consumption and emissions are minimized while achieving the desired drying effect. This design not only improves the cleaning efficiency of the roller press but also meets the requirements of modern industry for environmental protection and energy conservation.

[0067] Furthermore, the cleaning and wiping device is also equipped with intelligent sensing systems such as laser distance sensing systems and pressure sensing systems, which can automatically adjust the cleaning intensity according to the degree of stickiness to the roller.

[0068] Furthermore, the isolation tray 500 is equipped with an independent waste collection and treatment unit to maintain a clean working environment.

[0069] Furthermore, the cleaning and wiping device can adopt an adjustable installation structure to adapt to various models of roller pressing equipment, and different sizes and types are all within the protection scope of this design.

[0070] Combining Embodiments 1 and 2 above, the working principle of this utility model is as follows: When the roller press is working normally, the electrode 800 passes between the upper roller 710 and the lower roller 720, undergoing a roller pressing process. During this process, the hard scraper 100 first performs preliminary cleaning of the rollers, scraping off excess slurry adhering to the rollers. Subsequently, the soft scraper 200 further scrapes off the remaining deposits on the surface of the rollers, and the adsorption component 210 absorbs the generated slurry particles and dust, keeping the surface of the rollers clean. At the same time, the isolation disc 500 effectively prevents excess slurry and deposits generated during the cleaning and wiping process from entering the electrode 800 area, ensuring the quality of the electrode 800.

[0071] The roller wiping unit 300 performs a more thorough cleaning of the pressure roller surface by wiping the roller shaft 320, using the material of the wiping surface and the reverse motion to remove residual adhesive substances from the pressure roller surface. The spraying unit 310 assists in cleaning the pressure roller surface by spraying a gas-liquid mixture of cleaning fluid, improving the cleaning effect. Finally, the blowing and drying unit 400 blows and dries the wiped pressure roller surface, ensuring rapid drying and thus guaranteeing the continuous and stable operation of the roller press.

[0072] This invention achieves effective cleaning of the rollers of a roller press by rationally arranging and designing the various components of the cleaning and wiping device, thereby improving the cleaning efficiency and product quality of the roller press, while also meeting the requirements of modern industry for environmental protection and energy conservation.

[0073] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

[0074] It should be understood that the terms "front" and "rear" indicate the orientation or positional relationship based on the rotation direction of the pressure roller shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0075] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A cleaning wiper device for a pole piece roll press, characterized in that, include: Hard scraper (100), hard scraper (120) is attached to the surface of the pressure roller to scrape off excess slurry, and the gap between the hard scraper (120) and the surface of the pressure roller is adjustable; A soft scraper (200) is in contact with the surface of the pressure roller and is used to scrape off any remaining deposits on the surface of the pressure roller. The receiving isolation disc (500) is located between the electrode (800) and the pressure roller surface. It is used to isolate the electrode (800) area from the pressure roller surface area, or to receive and scrape off excess slurry and adhering substances. Among them, the hard scraper (100) and the soft scraper (200) are arranged in sequence along the rotation direction of the pressure roller.

2. The cleaning wipe of claim 1, wherein, The soft scraper (200) includes: The adsorption element (210), located above the soft scraper (230), is used to absorb slurry particles and dust generated during the scraping of residual deposits.

3. The cleaning wipe of claim 1, wherein, Also includes: The roller wiping component (300) is arranged behind the soft scraper component (200) along the rotation direction of the pressure roller and is used to wipe away the remaining adhesive on the surface of the pressure roller.

4. The cleaning wipe of claim 3, wherein, The roller wiping component (300) includes: A spray element (310) is located in front of the wiping roller shaft (320) and includes a plurality of high-pressure nozzles (330) for spraying cleaning liquid.

5. The cleaning wipe of claim 4, wherein, Each high-pressure nozzle (330) is connected to a liquid inlet pipe (340) and an air inlet pipe (350).

6. The cleaning wipe of claim 3, wherein, Also includes: The air-blowing drying component (400) is arranged behind the roller wiping component (300) along the rotation direction of the pressure roller, and is used to blow dry the surface of the pressure roller after wiping.

7. The cleaning wipe of claim 3, wherein, The roller wiping component (300) includes a wiping roller (320), the wiping surface of which is made of carbon fiber or PET fiber.

8. The cleaning wipe of claim 1, wherein, Also includes: The work cover (600) is used to house the pressure roller and the various components of the cleaning and wiping device, forming a relatively independent cleaning and wiping environment.

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