Device for coating electrode material by tape casting method under magnetic field

Abstract

The utility model discloses a device for coating an electrode material by a tape casting method under a magnetic field, which comprises a coating plate which is horizontally arranged and is used for horizontally bearing an aluminum foil; a coater is arranged above the coating plate; anti-deviation assemblies are arranged on the two sides of the coating plate and used for limiting linear sliding of the coater on the coating plate; a first permanent magnet is arranged below the coating plate and is used for forming a magnetic field around the coater; by rotating the adjusting screw rod, the sliding frame can slide on the sliding seat, so that the distance between the two limiting rods is adjusted, the two limiting rods can be tightly attached to the two side walls of the coater respectively, at the moment, a sliding track of the coater is formed between the two limiting rods, and then it can be guaranteed that the coater slides along the track.

Description

Technical Field

[0001] The utility model relates to a doctor blade coating device for electrode materials under a magnetic field, belonging to the technical field of coating. Background Technique

[0002] The operation mode of traditional coaters often relies on manual pushing by operators. Although this manual operation mode is simple and direct, in long-term or high-precision coating operations, significant limitations are exposed. Specifically, when manually pushing the coater, due to the instability of human factors and operation errors, the coater is prone to deviation or shaking during the sliding process, resulting in uneven coating, blurred edges, or even coating on non-target areas. Therefore, a doctor blade coating device for electrode materials under a magnetic field is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a doctor blade coating device for electrode materials under a magnetic field to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A doctor blade coating device for electrode materials under a magnetic field, comprising:

[0005] A coating plate, which is horizontally arranged and used to horizontally carry the aluminum foil;

[0006] A coater, which is arranged above the coating plate;

[0007] An anti-deviation component, which is arranged on both sides of the coating plate and used to limit the linear sliding of the coater on the coating plate;

[0008] A first permanent magnet, which is arranged below the coating plate and used to form a magnetic field around the coater;

[0009] Among them, the anti-deviation component includes:

[0010] Two sliding seats, which are symmetrically fixed on both sides of the coating plate;

[0011] Two sliding frames, which are respectively slidably connected to the two sliding seats through adjusting screws;

[0012] Two limiting rods, which are respectively fixed on the sliding frames. The two limiting rods are arranged in parallel, and the two limiting rods are respectively closely attached to both sides of the coater.

[0013] Preferably, a plurality of balls are evenly distributed on the opposite surfaces of the two limiting rods, and the balls are in rolling connection with the side wall of the coater.

[0014] Preferably, a plurality of sliding grooves are formed in the sliding frame, at least two guiding bolts are arranged inside each sliding groove, and the threaded ends of each guiding bolt are meshed and connected to the side wall of the sliding seat.

[0015] Preferably, a support frame for supporting the coating plate is arranged below the coating plate.

[0016] Preferably, a bottom plate for supporting the first permanent magnet is arranged on the support frame, and both ends of the bottom plate are slidably connected to the side walls of the support frame.

[0017] Preferably, handles for driving the bottom plate to slide on the support frame are fixed on the side walls at both ends of the bottom plate.

[0018] Preferably, a rotating plate is rotatably connected to one end of the support frame, and a pressing plate for pressing the end of the aluminum foil on the coating plate is fixedly connected to the rotating plate.

[0019] Preferably, second permanent magnets are arranged on both the rotating plate and the support frame;

[0020] When the rotating plate rotates to make the pressing plate press against the end of the aluminum foil on the coating plate, the second permanent magnet on the rotating plate and the second permanent magnet on the support frame are adsorbed and fixed to each other.

[0021] Compared with the prior art:

[0022] By rotating the adjusting screw rod, the sliding frame can slide on the sliding seat, so as to adjust the distance between the two limiting rods, so that the two limiting rods can respectively abut against the two side walls of the coater. At this time, a sliding track of the coater is formed between the two limiting rods, and then it can be ensured that the coater slides along the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is a side view of the overall structure of the present utility model;

[0025] Figure 3 is an exploded view of the sliding seat, sliding frame and limiting rod of the present utility model;

[0026] Figure 4 is a sectional view of the coating plate, sliding seat and support frame of the present utility model;

[0027] Figure 5 is a schematic structural diagram of the coating plate, support frame, rotating plate and pressing plate of the present utility model.

[0028] In the figure:

[0029] 1. Coating plate, 2. Coater;

[0030] 3. Anti-deviation component, 301. Slide base, 302. Sliding frame, 3021. Ear plate, 3022. Chute, 303. Limiting rod, 304. Adjusting screw, 305. Ball

[0031] 4. First permanent magnet, 5. Guide bolt, 6. Support frame

[0032] 7. Base plate, 701. Handle

[0033] 8. Rotating plate, 9. Pressing plate, 10. Second permanent magnet Specific implementation mode

[0034] The following uses specific embodiments to illustrate the present invention, but it is not a limitation to the invention.

[0035] Embodiment 1

[0036] As Figures 1 - 5 shown, in this embodiment, a coating device for electrode materials by the doctor blade method under a magnetic field is provided, including a coating plate 1. The coating plate 1 is horizontally arranged and used to horizontally carry the aluminum foil. The coating plate 1 can be made of transparent glass material. As Figure 1 shown, in order to support the coating plate 1, a support frame 6 for supporting the coating plate 1 is arranged below the coating plate 1. A base groove for installing the coating plate 1 is arranged on the upper end surface of the support frame 6. A coater 2 is arranged above the coating plate 1. The coater 2 is an adjustable coater 2. Two differential heads are arranged on the coater 2. By adjusting the two differential heads, the gap of the scraper can be adjusted in the up and down direction. The gap thickness between the scraper surface and the coating machine platform is the final coating thickness. The high-precision differential head can adjust the coating gap within a certain range, increasing in increments of 10um.

[0037] Anti-deviation components 3 are arranged on both sides of the coating plate 1 for limiting the linear sliding of the coater 2 on the coating plate 1; a first permanent magnet 4 is arranged below the coating plate 1 for forming a magnetic field around the coater 2.

[0038] Among them, the anti-deviation component 3 includes two slide bases 301. The slide bases 301 are fixed on both sides of the support frame 6, and then the two slide bases 301 are symmetrically fixed on both sides of the coating plate 1; sliding frames 302 are respectively slidably connected to the two slide bases 301 through adjusting screws 304. As Figures 2 - 4As shown in the figure, the adjusting screw rod 304 is rotatably connected to the sliding frame 302. The length direction of the adjusting screw rod 304 is parallel to the sliding direction of the sliding frame 302. An ear plate 3021 is provided on the sliding frame 302. The ear plate 3021 is meshed and connected to the adjusting screw rod 304. By rotating the adjusting screw rod 304, the ear plate 3021 slides on the adjusting screw rod 304. The cooperation between the ear plate 3021 and the adjusting screw rod 304 realizes driving the sliding frame 302 to slide on the sliding seat 301; Limiting rods 303 are respectively fixed on the sliding frame 302. The two limiting rods 303 are arranged in parallel, and the two limiting rods 303 are respectively closely attached to both sides of the coater 2.

[0039] Coating process:

[0040] The first step: Place the coater 2 at the initial position of the coating plate 1, then rotate the adjusting screw rod 304 to adjust the distance between the two limiting rods 303 so that the two limiting rods 303 are respectively closely attached to the two side walls of the coater 2. Then, remove the coater 2 from the coating plate 1. At this time, a sliding track for the coater 2 is formed between the two limiting rods 303, and then it can be ensured that the coater 2 slides along the track;

[0041] The second step: Place the aluminum foil on the coating plate 1 and pour the slurry on the aluminum foil;

[0042] The third step: Place the coater 2 on the coating plate 1 and slide along the track formed between the two limiting rods 303 to realize coating the slurry on the aluminum foil;

[0043] During the coating process from the first step to the third step above, the first permanent magnet 4 forms a magnetic field around the coater 2. Using the non-intrinsic paramagnetic property of the material, a material with grain orientation can be obtained in the magnetic field, thereby accelerating Li + conduction and improving the performance of lithium-ion batteries. During the preparation of the electrode sheet, Li 1.2 Mn 0.6 Ni 0.2 02 active material, Super-P conductive agent and polyvinylidene fluoride (PVDF) binder are uniformly mixed with N-methylpyrrolidone (NMP) as a solvent in a mass ratio of 8:1:1 to form a uniform slurry. Then, the slurry is coated on the aluminum. A magnetic field of ≈500 mT is applied to the wet electrode sheet in the vertical direction by the first permanent magnet for 15 min. Under the influence of the magnetic field on Li 1.2 Mn 0.6 Ni 0.2 02 material, the magnetic anisotropy between Li 1.2 Mn 0.6 Ni 0.2 02 particles interacts with the external magnetic field to generate a magnetic torque to rotate the particles, adjust the grain orientation, and preferentially arrange along the (003) direction of the easy magnetization c-axis.

[0044] As Figures 1 - 3 shown, in order to make the applicator 2 slide smoothly on the coating plate 1, a plurality of balls 305 are evenly distributed on the opposite surfaces of the two limiting rods 303, and the balls 305 are in rolling connection with the side wall of the applicator 2.

[0045] As Figure 4 shown, in order to make the sliding frame 302 slide more stably on the sliding seat 301, so that the two limiting rods 303 can move relative to each other, a plurality of sliding grooves 3022 are formed in the sliding frame 302, and at least two guiding bolts 5 are arranged inside each sliding groove 3022, and the threaded ends of each guiding bolt 5 are meshed and connected to the side wall of the sliding seat 301.

[0046] Embodiment 2

[0047] As Figure 1 、 Figure 4 shown, on the basis of Embodiment 1, in order to support the first permanent magnet 4 and, at the same time, be able to flexibly adjust the position of the first permanent magnet 4 relative to the coating plate 1, a bottom plate 7 for supporting the first permanent magnet 4 is arranged on the support frame 6, and both ends of the bottom plate 7 are slidably connected to the side walls of the support frame 6; handle 701 for driving the bottom plate 7 to slide on the support frame 6 is fixed on the side walls at both ends of the bottom plate 7.

[0048] Embodiment 3

[0049] As Figure 1 、 Figure 5 shown, on the basis of Embodiment 1, in order to clamp the aluminum foil on the coating plate 1 and prevent the aluminum foil from moving on the coating plate 1 during the coating process, a rotating plate 8 is rotatably connected to one end of the support frame 6, a pressing plate 9 for pressing the end of the aluminum foil on the coating plate 1 is fixedly connected to the rotating plate 8, and anti-slip patterns are arranged on the side wall of the pressing plate 9 that presses the aluminum foil. Second permanent magnets 10 are arranged on both the rotating plate 8 and the support frame 6; when the rotating plate 8 rotates to make the pressing plate 9 press on the end of the aluminum foil on the coating plate 1, the second permanent magnet 10 on the rotating plate 8 and the second permanent magnet 10 on the support frame 6 adsorb each other.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or equivalently replaced. Any modification or partial replacement without departing from the spirit and scope of the present invention should be covered by the scope of the claims of the present invention.

Claims

1. A doctor blade coating device for electrode materials under a magnetic field, characterized in that, Including: A coated plate (1), which is horizontally arranged and used for horizontally carrying aluminum foil; A coater (2), which is arranged above the coated plate (1); An anti-deviation component (3), which is arranged on both sides of the coated plate (1) and used to limit the linear sliding of the coater (2) on the coated plate (1); A first permanent magnet (4), which is arranged below the coated plate (1) and used to form a magnetic field around the coater (2); Wherein, the anti-deviation component (3) includes: Two sliding seats (301), which are symmetrically fixed on both sides of the coated plate (1); Two sliding frames (302), which are respectively slidably connected to the two sliding seats (301) through adjusting screws (304); Two limiting rods (303), which are respectively fixed on the sliding frames (302), the two limiting rods (303) are arranged in parallel, and the two limiting rods (303) are respectively closely attached to both sides of the coater (2).

2. The doctor blade coating device for electrode materials under a magnetic field according to claim 1, wherein A plurality of balls (305) are evenly distributed on the opposite surfaces of the two limiting rods (303), and the balls (305) are in rolling connection with the side wall of the coater (2).

3. A tape casting device for electrode materials under a magnetic field according to claim 1, characterized in that, A plurality of chutes (3022) are formed on the sliding frame (302), and at least two guiding bolts (5) are arranged inside each chute (3022), and the threaded ends of each guiding bolt (5) are meshed and connected to the side wall of the sliding seat (301).

4. A casting coating device for electrode materials under a magnetic field according to claim 1, characterized in that, A support frame (6) for supporting the coated plate (1) is arranged below the coated plate (1).

5. The casting device for coating electrode materials under a magnetic field according to claim 4, characterized in that, A bottom plate (7) for supporting the first permanent magnet (4) is arranged on the support frame (6), and both ends of the bottom plate (7) are slidably connected to the side walls of the support frame (6).

6. The doctor blade coating device for electrode materials under a magnetic field according to claim 5, characterized in that, Handles (701) for driving the bottom plate (7) to slide on the support frame (6) are fixed on the side walls at both ends of the bottom plate (7).

7. A casting coating device for electrode materials under a magnetic field according to claim 4, characterized in that, A rotating plate (8) is rotatably connected to one end of the support frame (6), and a pressing plate (9) for pressing the end of the aluminum foil on the coated plate (1) is fixedly connected to the rotating plate (8).

8. A tape casting apparatus for electrode materials under a magnetic field according to claim 7, wherein, Second permanent magnets (10) are arranged on both the rotating plate (8) and the support frame (6); When the rotating plate (8) rotates to make the pressing plate (9) press the end of the aluminum foil on the coated plate (1), the second permanent magnet (10) on the rotating plate (8) and the second permanent magnet (10) on the support frame (6) are mutually adsorbed.

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