A lithium battery gravure coating slurry filtration device

Abstract

This utility model discloses a lithium battery gravure coating slurry filtration device, including a fine filter box. The fine filter box has an external jacket, with an inlet and an outlet on one side of the jacket. The inlet is located at the bottom of the outlet. A storage chamber is formed between the jacket and the fine filter box. A pad is placed inside the fine filter box, and a mounting frame is mounted on top of the pad. A composite membrane filter element is placed inside the mounting frame, and a sealing ring is provided between the mounting frame and the fine filter box. This utility model uses an internal temperature sensor to detect the temperature of the coating slurry during filtration. When the slurry temperature is too high, cold water is introduced into the storage chamber through the inlet to exchange heat with the slurry, thus cooling it. When the slurry temperature is too low, warm water is introduced into the inlet to heat the slurry, ensuring filtration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, specifically to a lithium battery gravure coating slurry filtration device. Background Technology

[0002] The lithium battery gravure plate is one of the core components used in the coating process during lithium battery production. It stores electrode paste through tiny grooves engraved on its surface and then precisely transfers the paste onto the substrate to form a uniform coating. To ensure coating quality and battery performance, the coating paste needs to be pre-filtered.

[0003] According to CN212998653U, a coating slurry filtration device includes a barrel, an iron removal device for adsorbing iron impurities and multiple filter screens for filtering particulate impurities are installed inside the barrel, and a vibration device is installed on the outside of the barrel. The filter screens are all circular mesh structures, spaced apart along the axial direction of the barrel. The iron removal device is a cylindrical structure, located between the top two layers of filter screens. Multiple parallel cylindrical magnetic rods are installed inside the iron removal device. This invention features multiple layers of filter screens, which can more effectively filter out particulate impurities in the slurry. The mesh size of the filter screens increases progressively, allowing for the separate filtration of particulate impurities from large to small, thus preventing filter clogging. The iron removal device effectively adsorbs fine iron impurities in the slurry, improving the purity of the lithium battery slurry. The vibration device disperses the slurry, ensuring it passes evenly through the filter screens, and also vibrates the particulate impurities to prevent them from clogging the filter screens.

[0004] The above-mentioned filter screen, vibration device and other structures can achieve uniform filtration of slurry. However, if the temperature of the slurry is too low during filtration, the viscosity will increase and affect the filtration efficiency. If the temperature is too high, the solvent will evaporate and change the solid content, affecting the effect of the coated slurry after filtration. Utility Model Content

[0005] The purpose of this invention is to provide a lithium battery gravure coating slurry filtration device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery gravure coating slurry filtration device, comprising a fine filter box, a jacket provided on the outside of the fine filter box, an inlet and an outlet provided on one side of the jacket, the inlet being located at the bottom of the outlet, a liquid storage cavity being formed between the jacket and the fine filter box, a pad provided inside the fine filter box, a mounting frame provided on the top of the pad, a composite membrane filter element provided inside the mounting frame, and a sealing ring provided between the mounting frame and the fine filter box.

[0007] As a further preferred embodiment of this technical solution, a discharge port is fixedly connected to one bottom side of the fine filter box, a water inlet is fixedly connected to the side of the fine filter box opposite to the discharge port, and a sewage pipe is fixedly connected to the top side of the fine filter box.

[0008] As a further preferred embodiment of this technical solution, the top of the fine filter box is fixedly connected to a connecting channel, the bottom of the connecting channel is provided with an electric valve, the top of the connecting channel is fixedly connected to a coarse filter box, and the bottom four corners of the coarse filter box are fixedly connected to support legs.

[0009] As a further preferred embodiment of this technical solution, a feed inlet is fixedly connected to one side of the top of the coarse filter box.

[0010] As a further preferred embodiment of this technical solution, a second pad is provided inside the coarse filter box, and a metal filter screen is provided on the top of the second pad.

[0011] As a further preferred embodiment of this technical solution, a drive motor is fixedly connected to the top of the coarse filter box, the output shaft of the drive motor passes through the top of the coarse filter box and is fixedly connected to a stirring shaft at the end, and push plates are symmetrically arranged on both sides of the stirring shaft, with the bottom of the push plates in contact with the metal filter screen.

[0012] As a further preferred embodiment of this technical solution, connecting rods are symmetrically arranged on both sides of the stirring shaft, and a cleaning scraper is fixedly connected to the end of the connecting rod away from the stirring shaft. The cleaning scraper is in contact with the inner wall of the coarse filter box, and a spiral pushing blade is fixedly connected to the bottom surface of the stirring shaft. The spiral pushing blade is located inside the connecting channel.

[0013] This utility model provides a lithium battery gravure coating slurry filtering device, which has the following beneficial effects: (1) In this utility model, when the coating slurry is filtered in the fine filter box, the temperature of the slurry is detected by the internal temperature sensor. When the temperature of the slurry is too high, cold water is introduced into the storage chamber through the liquid inlet and heat exchanged with the slurry to cool it down. When the temperature of the slurry is too low, warm water is introduced into the liquid inlet to heat the slurry to ensure filtration efficiency.

[0014] (2) By starting the drive motor, the output shaft of the present invention drives the stirring shaft to rotate, and the push plate rotates accordingly. Thus, while the metal filter screen filters the slurry, it can push the slurry to move, thereby accelerating the downward movement of the slurry. The filtered impurities and particles move with the push plate, which can avoid excessive accumulation that could cause the metal filter screen to become clogged and affect the filtration efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a schematic cross-sectional view of the fine filter box of this utility model; Figure 3 This is a schematic diagram of the composite membrane filter structure of this utility model; Figure 4 This is a schematic cross-sectional view of the coarse filter box of this utility model; Figure 5 This is a schematic diagram of the spiral pushing blade and cleaning scraper structure of this utility model.

[0016] In the diagram: 1. Fine filter box; 2. Jacket; 3. Liquid inlet; 4. Liquid outlet; 5. Liquid storage chamber; 6. Pad plate one; 7. Mounting frame; 8. Composite membrane filter element; 9. Sealing ring; 10. Discharge port; 11. Water inlet; 12. Sewage pipe; 13. Connecting channel; 14. Electric valve; 15. Coarse filter box; 16. Support leg; 17. Feed inlet; 18. Pad plate two; 19. Metal filter screen; 20. Drive motor; 21. Stirring shaft; 22. Push plate; 23. Spiral pusher blade; 24. Connecting rod; 25. Cleaning scraper. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] This utility model provides a technical solution: such as Figures 1 to 5 As shown in this embodiment, a lithium battery gravure coating slurry filtration device includes a fine filter box 1. A jacket 2 is provided on the outside of the fine filter box 1. An inlet 3 and an outlet 4 are provided on one side of the jacket 2. The inlet 3 is located at the bottom of the outlet 4. A liquid storage chamber 5 is formed between the jacket 2 and the fine filter box 1. A pad 6 is provided inside the fine filter box 1. A mounting frame 7 is provided on the top of the pad 6. A composite membrane filter element 8 is provided inside the mounting frame 7. A sealing ring 9 is provided between the mounting frame 7 and the fine filter box 1.

[0019] A temperature sensor is installed inside the fine filter box 1. The temperature sensor can detect the temperature of the slurry and transmit the temperature signal to the external control system, which compares it with the preset temperature range. When the slurry temperature is too high, cold water is introduced into the storage chamber 5 through the liquid inlet 3 to exchange heat with the slurry and cool it down. When the slurry temperature is too low, warm water is introduced into the liquid inlet 3 to heat the slurry and ensure filtration efficiency.

[0020] The mounting frame 7 is fixed to the pad 6 with screws, and a sealing ring 9 is provided between the mounting frame 7 and the fine filter box 1 to ensure the sealing of the connection. A composite membrane filter element 8 is provided inside the mounting frame 7. The composite membrane filter element 8 is a deep filter element combination with gradient pore size, with the upper layer being 10μm, the middle layer being 5μm, and the lower layer being 1μm. Polypropylene, polytetrafluoroethylene, and ceramic sintering materials are selected respectively to ensure the overall filtration effect.

[0021] A discharge port 10 is fixedly connected to the bottom side of the fine filter box 1, an inlet 11 is fixedly connected to the side of the fine filter box 1 away from the discharge port 10, and a drain pipe 12 is fixedly connected to the top side of the fine filter box 1.

[0022] A slope plate inclined towards the discharge port 10 is provided at the bottom of the fine filter box 1. After the filtration process is completed, the slurry is conveyed to the discharge port 10 through the slope plate and removed from the inside of the fine filter box 1. An inlet 11 and a drain pipe 12 are provided on the fine filter box 1 to form a backwashing system. When the filtration efficiency of the composite membrane filter element 8 decreases, the valve in the discharge port 10 and the electric valve 14 are closed, and water is circulated into the inlet 11 so that the impurities accumulated on the surface of the composite membrane filter element 8 are removed from the drain pipe 12, thereby restoring the filtration effect.

[0023] The top of the fine filter box 1 is fixedly connected to a connection channel 13, the bottom of the connection channel 13 is provided with an electric valve 14, the top of the connection channel 13 is fixedly connected to a coarse filter box 15, and the bottom four corners of the coarse filter box 15 are fixedly connected to support legs 16.

[0024] A feed inlet 17 is fixedly connected to one side of the top of the coarse filter box 15.

[0025] The coarse filter box 15 is equipped with a second gasket 18, and a metal filter screen 19 is installed on the top of the second gasket 18.

[0026] A drive motor 20 is fixedly connected to the top of the coarse filter box 15. The output shaft of the drive motor 20 passes through the top of the coarse filter box 15 and is fixedly connected to the end of the stirring shaft 21. Push plates 22 are symmetrically arranged on both sides of the stirring shaft 21, and the bottom of the push plates 22 is in contact with the metal filter screen 19.

[0027] When the drive motor 20 is started, its output shaft drives the stirring shaft 21 to rotate, and the push plate 22 rotates accordingly. This allows the slurry to move while the metal filter screen 19 filters the slurry, thus accelerating its downward movement. The filtered impurities and particles move with the push plate 22, preventing excessive accumulation that could clog the metal filter screen 19 and affect filtration efficiency. Pressure valves are installed on both the coarse filter box 15 and the fine filter box 1, along with internal pressure sensors, to ensure internal pressure balance and the normal operation of the device.

[0028] Connecting rods 24 are symmetrically arranged on both sides of the stirring shaft 21. A cleaning scraper 25 is fixedly connected to one end of the connecting rod 24 away from the stirring shaft 21. The cleaning scraper 25 is in contact with the inner wall of the coarse filter box 15. A spiral pusher blade 23 is fixedly connected to the bottom surface of the stirring shaft 21. The spiral pusher blade 23 is located inside the connecting channel 13.

[0029] When the stirring shaft 21 rotates, the connecting rod 24 and the cleaning scraper 25 rotate accordingly, thereby scraping off the slurry adhering to the inner wall of the coarse filter box 15 to facilitate subsequent cleaning. At the same time, the stirring shaft 21 drives the spiral pusher blade 23 to rotate, thereby conveying the pre-filtered slurry into the connecting channel 13 to facilitate material discharge.

[0030] This utility model provides a lithium battery gravure coating slurry filtering device, the specific working principle of which is as follows: In use, the coating slurry is fed into the coarse filter box 15 through the feed inlet 17. The coating slurry passes through the metal filter screen 19, thereby filtering out impurities and particles. The drive motor 20 is started, and its output shaft drives the stirring shaft 21 to rotate. The push plate 22 rotates accordingly, thereby pushing the slurry to move, accelerating the downward movement of the slurry, and pushing the filtered impurities and particles to one side to ensure the normal filtration operation of the metal filter screen 19. The connecting rod 24 and the cleaning scraper 25 rotate with the stirring shaft 21, thereby scraping off the slurry adhering to the inner wall of the coarse filter box 15. The slurry after initial filtration is pushed into the fine filter box 1 by the rotation of the spiral pusher blade 23. The slurry is finely filtered through the composite membrane filter element 8, thereby separating and removing the tiny impurities. The valve in the discharge port 10 is opened, allowing the slurry to move out from the discharge port 10 along the slope at the bottom of the fine filter box 1.

[0031] 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 lithium battery gravure coating slurry filtration device, comprising a fine filter box (1), characterized in that: The fine filter box (1) is provided with a jacket (2) on the outside. The jacket (2) is provided with an inlet (3) and an outlet (4) on one side. The inlet (3) is located at the bottom of the outlet (4). A liquid storage chamber (5) is formed between the jacket (2) and the fine filter box (1). A pad (6) is provided inside the fine filter box (1). A mounting bracket (7) is provided on the top of the pad (6). A composite membrane filter element (8) is provided inside the mounting bracket (7). A sealing ring (9) is provided between the mounting bracket (7) and the fine filter box (1). 2.The lithium battery intaglio coating slurry filtering device according to claim 1, characterized in that: A discharge port (10) is fixedly connected to the bottom of one side of the fine filter box (1), an inlet (11) is fixedly connected to the side of the fine filter box (1) away from the discharge port (10), and a sewage pipe (12) is fixedly connected to the top side of the fine filter box (1). 3.The lithium battery intaglio coating slurry filtering device according to claim 1, characterized in that: The top of the fine filter box (1) is fixedly connected to a connecting channel (13), the bottom of the connecting channel (13) is provided with an electric valve (14), the top of the connecting channel (13) is fixedly connected to a coarse filter box (15), and the bottom four corners of the coarse filter box (15) are fixedly connected to support legs (16).

4. The filter device for a lithium battery intaglio coating slurry according to claim 3, characterized in that: The coarse filter box (15) is fixedly connected to the top side of the feed inlet (17).

5. The filter device for a lithium battery intaglio coating slurry according to claim 3, characterized in that: The coarse filter box (15) is provided with a second pad (18) inside, and a metal filter screen (19) is provided on the top of the second pad (18).

6. The filter device for a lithium battery intaglio coating slurry according to claim 3, characterized in that: A drive motor (20) is fixedly connected to the top of the coarse filter box (15). The output shaft of the drive motor (20) passes through the top of the coarse filter box (15) and is fixedly connected to a stirring shaft (21) at the end. Push plates (22) are symmetrically arranged on both sides of the stirring shaft (21). The bottom of the push plate (22) is in contact with the metal filter screen (19).

7. The filter device for a lithium battery intaglio coating slurry according to claim 6, characterized in that: The stirring shaft (21) is symmetrically provided with connecting rods (24) on both sides. A cleaning scraper (25) is fixedly connected to one end of the connecting rod (24) away from the stirring shaft (21). The cleaning scraper (25) is in contact with the inner wall of the coarse filter box (15). A spiral pusher blade (23) is fixedly connected to the bottom surface of the stirring shaft (21). The spiral pusher blade (23) is located inside the connecting channel (13).

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