Battery pole piece coating device

Abstract

The utility model discloses a battery pole piece coating device and belongs to the technical field of battery production. An inner guide roller is rotationally arranged in the slurry containing box, two mounting plates are fixed to the upper end of the slurry containing box, each mounting plate is provided with a first auxiliary plate and a limiting sliding groove, each scraping plate is provided with a second auxiliary plate, each second auxiliary plate is arranged in the corresponding limiting sliding groove, and each second auxiliary plate is in threaded connection with the corresponding adjusting screw rod; each adjusting screw rod is rotationally connected with the corresponding first auxiliary plate, and the two adjusting screw rods are oppositely arranged. The two scraping plates are correspondingly arranged, and a gap is reserved between the two scraping plates and corresponds to the discharging end of the inner guide roller. According to the utility model, through the inner guide roller immersed in the slurry and the scraper, the coating uniformity is ensured, the performance difference of positive and negative pole pieces of the lithium ion battery is reduced, and the overall performance and safety of the battery are improved.

Description

Technical Field

[0001] The utility model relates to a battery pole piece coating device, belonging to the technical field of battery production. Background Art

[0002] Traditional coating devices mainly rely on a coating roller to dip into the slurry in a slurry tank and then coat the slurry on the pole piece. Due to the instability of the coating roller when dipping into the slurry, factors such as uneven roller surface speed, changes in slurry concentration, and fluctuations in the contact angle between the roller surface and the slurry tank will all cause uneven distribution of the slurry during the coating process. Uneven coating will result in differences in the performance of the positive and negative pole pieces of lithium-ion batteries, such as too high or too low local capacity, uneven internal resistance, etc., which will in turn affect the overall performance and safety of the battery. In addition, uneven coating may also increase the difficulty of subsequent production processes, such as a decrease in the qualification rate of processes such as welding and encapsulation, increasing production costs.

[0003] Therefore, although the existing coating devices can meet the production requirements to a certain extent, there is still room for improvement in coating uniformity. To solve this problem, a coating device is urgently needed to improve coating uniformity. Content of the Utility Model

[0004] To solve the problems in the background art, the utility model provides a battery pole piece coating device.

[0005] To achieve the above object, the utility model adopts the following technical solution: A battery pole piece coating device includes a slurry storage tank, an inner guide roller, and a squeegee; an inner guide roller is rotatably arranged in the slurry storage tank, and two squeegees are arranged at the upper end of the slurry storage tank. The two squeegees are arranged correspondingly, and there is a gap between the two squeegees. The gap corresponds to the discharge end of the inner guide roller.

[0006] Two mounting plates are fixed at the upper end of the slurry storage tank. Each mounting plate is provided with a first auxiliary plate and a limit chute. Each squeegee is provided with a second auxiliary plate. Each second auxiliary plate is respectively arranged in the corresponding limit chute. Each second auxiliary plate is respectively threadedly connected with a corresponding adjusting screw. Each adjusting screw is respectively rotatably connected with the corresponding first auxiliary plate. The two adjusting screws are arranged oppositely.

[0007] Each squeegee is arranged at the lower end of the corresponding mounting plate.

[0008] The opposite ends of the two squeegees are both wedge-shaped surfaces.

[0009] A guiding plate is arranged at the lower end of each squeegee. Each guiding plate is respectively located below the corresponding wedge-shaped surface.

[0010] Two side baffles are arranged between the two squeegees.

[0011] The lower ends of the two side baffles are slidably connected to two scraping plates, and the upper ends of the two side baffles are correspondingly screwed to both ends of a bidirectional screw, and the bidirectional screw is rotationally connected to the slurry storage tank.

[0012] An inlet roller is rotatably arranged in the slurry storage tank, and the inlet roller is arranged at the feeding end of the inner guide roller.

[0013] The upper end of the slurry storage tank is rotationally connected to an outlet roller, and the outlet roller is arranged at the discharging end of the gap between the two scraping plates.

[0014] The outlet roller is located directly above the inner guide roller, and the diameter of the outlet roller is the same as that of the inner guide roller.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model ensures the coating uniformity through the inner guide roller and the scraping plates immersed in the slurry, reduces the performance differences between the positive and negative electrode plates of the lithium-ion battery, and improves the overall performance and safety of the battery.

[0017] 2. By arranging the side baffles, the utility model can scrape the slurry on both sides of the electrode plate, avoid the retention of the slurry at the edge side of the electrode plate, and ensure the coating uniformity.

[0018] 3. The positions of the scraping plates and the side baffles of the utility model can be adjusted according to the production requirements, meeting the production requirements of different electrode plates.

[0019] 4. The wedge-shaped surface design of the scraping plate and the arrangement of the guiding plate of the utility model facilitate the effective reflux of the excess slurry. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the utility model;

[0021] Figure 2 is Figure 1 a cross-sectional view of

[0022] Figure 3 is a schematic connection diagram of the slurry storage tank, the inner guide roller, the inlet roller, the outlet roller and the mounting plate;

[0023] Figure 4 is Figure 3 a cross-sectional view of

[0024] Figure 5 is a schematic connection diagram of the scraping plate, the side baffle, the bidirectional screw and the guiding plate;

[0025] Figure 6 is a schematic connection diagram of the scraping plate and the guiding plate;

[0026] Figure 7 It is a schematic diagram of the connection relationship between the side baffle and the bidirectional screw. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] A battery pole piece coating device includes a slurry storage tank 1, an inner guide roller 3, and a squeegee 6; an inner guide roller 3 is rotatably provided in the slurry storage tank 1, and two squeegees 6 are provided at the upper end of the slurry storage tank 1. The two squeegees 6 are correspondingly arranged and there is a gap between the two squeegees 6, and the gap is correspondingly arranged with the discharge end of the inner guide roller 3.

[0029] When coating, the pole piece 11 is introduced into the slurry in the slurry storage tank 1 and then discharged from the slurry after passing through the inner guide roller 3, so as to ensure that the pole piece 11 is completely immersed in the slurry and then removed from the slurry, so that the slurry can be evenly and densely coated on the outer surface of the pole piece 11. Then, when the pole piece 11 moves upward with the slurry, the squeegee 6 can scrape both sides of the pole piece 11, so that the slurry on the pole piece 11 is more evenly distributed; after drying (the drying device is not shown in the figure and is arranged below the discharge roller 4, so as to ensure that the slurry on the pole piece 11 is dried and then contacts the discharge roller 4. The drying device is a prior art and will not be described in detail), a pole piece 11 with a uniform coating is obtained.

[0030] Two mounting plates 5 are fixed at the upper end of the slurry storage tank 1. Each mounting plate 5 is provided with a first auxiliary plate and a limit chute. Each squeegee 6 is provided with a second auxiliary plate. Each second auxiliary plate is respectively arranged in the corresponding limit chute, and each second auxiliary plate is respectively threadedly connected with a corresponding adjusting screw 7. Each adjusting screw 7 is respectively rotatably connected with the corresponding first auxiliary plate through a bearing, and the two adjusting screws 7 are oppositely arranged.

[0031] By respectively driving the two squeegees 6 to move through the two adjusting screws 7, the positions of the two squeegees 6 are respectively adjusted to facilitate adapting to the scraping and leveling requirements of different pole pieces 11.

[0032] Each squeegee 6 is arranged at the lower end of the corresponding mounting plate 5, so that the scraped slurry can fall back into the slurry storage tank 1 again.

[0033] The opposite ends of the two squeegees 6 are both wedge-shaped surfaces, which can guide the scraped slurry, making it easier for the slurry to fall.

[0034] A guiding plate 8 is provided at the lower end of each scraping plate 6. Each guiding plate 8 is respectively located at the lower part of the corresponding wedge-shaped surface. The guiding plate 8 can laterally intercept the slurry scraped off by the scraping plate 6, ensuring that the slurry flows along the wedge-shaped surface onto the guiding plate 8 and then drops back into the slurry storage tank 1, avoiding the random flow of the slurry on the lower end surface of the scraping plate 6 and causing the solidification and accumulation of the slurry.

[0035] Two side baffles 9 are provided between the two scraping plates 6. The two side baffles 9 can scrape the slurry on both sides of the pole piece 11, avoiding the retention of the slurry on the side of the pole piece 11.

[0036] The lower ends of the two side baffles 9 are slidably connected to the two scraping plates 6 through chutes. The upper ends of the two side baffles 9 are correspondingly screwed to the two ends of the bidirectional screw 10. The bidirectional screw 10 is rotationally connected to the slurry storage tank 1 through a mounting support plate. By rotating the bidirectional screw 10, the two side baffles 9 can be controlled to move closer to or away from each other synchronously, so that the device can adapt to the slurry scraping requirements of the sides of pole pieces 11 with different widths.

[0037] An inlet roller 2 is rotatably provided in the slurry storage tank 1. The inlet roller 2 is arranged at the feeding end of the inner guide roller 3. The inlet roller 2 guides the pole piece 11, avoiding the rubbing of the pole piece 11 against the edge of the slurry storage tank 1 when the pole piece 11 enters the slurry.

[0038] The upper end of the slurry storage tank 1 is rotationally connected to an outlet roller 4 through a mounting support plate. The outlet roller 4 is arranged at the discharging end of the gap between the two scraping plates 6. The outlet roller 4 guides the pole piece 11 after passing through the inner guide roller 3, avoiding the rubbing of the pole piece 11 after coating against the edge of the slurry storage tank 1.

[0039] The outlet roller 4 is located directly above the inner guide roller 3, and the diameter of the outlet roller 4 is the same as that of the inner guide roller 3.

[0040] After passing through the inner guide roller 3, the pole piece 11 moves out of the slurry vertically from bottom to top, further ensuring that the slurry is evenly distributed on the pole piece 11 and facilitating the downward sliding of the excessive slurry on the pole piece 11 back into the slurry storage tank 1.

[0041] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0042] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery pole piece coating device, characterized in that: The invention comprises a pulp box (1), an inner guide roller (3), and a scraper (6); the inner guide roller (3) is rotatably arranged inside the pulp box (1), and two scrapers (6) are arranged at the upper end of the pulp box (1); the two scrapers (6) are arranged correspondingly and a gap is left between the two scrapers (6); the gap is arranged correspondingly to the discharge end of the inner guide roller (3).

2. A battery pole piece coating device according to claim 1, characterized in that: Two mounting plates (5) are fixed to the upper end of the slurry box (1), each mounting plate (5) is provided with an auxiliary plate 1 and a limiting slide groove, each scraper (6) is provided with an auxiliary plate 2, each auxiliary plate 2 is respectively arranged in a corresponding limiting slide groove, each auxiliary plate 2 is respectively threadedly connected to a corresponding adjusting screw (7), each adjusting screw (7) is respectively rotatably connected to a corresponding auxiliary plate 1, and the two adjusting screws (7) are arranged opposite to each other.

3. A battery pole piece coating device according to claim 2, characterized in that: Each scraper (6) is arranged at the lower end of the corresponding mounting plate (5).

4. A battery pole piece coating device according to claim 1 or 3, characterized in that: The opposite ends of the two scrapers (6) are both wedge-shaped surfaces.

5. A battery pole piece coating device according to claim 4, characterized in that: A guide plate (8) is provided at the lower end of each scraper (6), and each guide plate (8) is located at the lower part of the corresponding wedge surface.

6. A battery pole piece coating device according to claim 1, characterized in that: Two side baffles (9) are arranged between the two scrapers (6).

7. A battery pole piece coating device according to claim 6, characterized in that: The lower ends of the two side baffles (9) are slidably connected to the two scrapers (6), and the upper ends of the two side baffles (9) are correspondingly screwed to the two ends of the bidirectional screw (10), and the bidirectional screw (10) is rotationally connected to the pulp box (1).

8. A battery pole piece coating device according to claim 5 or 7, characterized in that: An introduction roller (2) is rotatably arranged in the pulp box (1), and the introduction roller (2) is arranged at the feeding end of the inner guide roller (3).

9. A battery pole piece coating device according to claim 1, characterized in that: The upper end of the pulp box (1) is rotatably connected to a discharge roller (4), and the discharge roller (4) is arranged at the discharge end of the gap between the two scrapers (6).

10. A battery pole piece coating device according to claim 9, characterized in that: The lead-out roller (4) is located directly above the inner guide roller (3), and the diameter of the lead-out roller (4) is the same as the diameter of the inner guide roller (3).

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