An automated surface coating apparatus for battery current collectors

Abstract

This invention relates to an automated surface coating device for battery current collectors, comprising a frame on which reciprocating components and a storage tank driven by the reciprocating components are symmetrically arranged. A liquid outlet component is located at the lower end of the storage tank, and the liquid outlet component includes a rolling roller. A linkage component and a pressurizing component driven by the linkage component are located on one side of the reciprocating components, and a guide component is located on the pressurizing component. A drive component for rotating the rolling roller is located on the side of the storage tank. In this invention, the reciprocating components drive the liquid outlet component to coat the slurry onto the battery electrode sheets and smooth it using the rolling roller. When the liquid outlet component resets, the liquid outlet is closed by the guide component, and the slurry is further smoothed by the rolling roller, allowing the slurry to adhere more firmly to the battery cell and making the slurry more uniform on the battery cell.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, specifically to an automated surface coating device for battery current collectors. Background Technology

[0002] Cell coating is a core process in lithium battery manufacturing that imparts specific functions to electrodes, separators, and cell casings. It plays a decisive role in battery performance, safety, lifespan, and manufacturing costs. Coating the surface of aluminum or copper foil with a slurry containing active materials is key to determining battery capacity.

[0003] A Chinese invention patent with publication number CN115518785B discloses a battery current collector coating device, including a frame, a conversion mechanism, an electrode sheet, a cylinder, a cylinder rod, a transfer box, a suction pump, a storage mechanism, a slide cylinder, a slide tube, a guide block, a guide groove, a spring, and a spray channel. The conversion mechanism is provided on the frame, and the electrode sheet is provided on the conversion mechanism. The cylinder is fixedly installed on the frame, and the cylinder rod is slidably connected to the frame. The transfer box is welded to the cylinder rod and contacts the frame. The suction pump is fixedly installed on the frame and is connected to the transfer box through a hose. The storage mechanism is provided on the frame, and the slide cylinder is welded to the transfer box. The slide tube is slidably connected inside the slide cylinder, and a spring is provided inside the slide cylinder. The end of the slide tube is provided with a spray channel.

[0004] However, the inventors discovered that during actual production, irregular large particle protrusions are visible on the surface of the battery cell during coating. This is mainly due to uneven mixing of the slurry, which causes fine particles such as conductive agents to not disperse and form agglomerates. Based on this, we proposed an automated surface coating device for battery current collectors. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by symmetrically arranging a reciprocating assembly and a liquid storage tank driven by the reciprocating assembly on a frame. A liquid outlet assembly is located at the lower end of the liquid storage tank, and the liquid outlet assembly includes a rolling roller. A linkage assembly and a pressurizing assembly driven by the linkage assembly are located on one side of the reciprocating assembly, and a guide assembly is located on the pressurizing assembly. A drive assembly for rotating the rolling roller is located on the side of the liquid storage tank. In this invention, the reciprocating assembly is used to drive the liquid outlet assembly to coat the slurry onto the battery electrode and scrape it flat by the rolling roller. When the liquid outlet assembly resets, the liquid outlet of the liquid outlet assembly is closed by the drive of the guide assembly, and the slurry is rolled flat again by the rolling roller, so that the slurry can adhere more firmly to the battery cell and the slurry on the battery cell is more uniform.

[0006] To address the aforementioned technical problems, the present invention adopts the following technical solution:

[0007] An automated surface coating device for battery current collectors includes a frame, on which reciprocating components and a storage tank driven by the reciprocating components are symmetrically arranged. A liquid outlet component is located at the lower end of the storage tank. The liquid outlet component includes a rolling roller. A linkage component and a pressurizing component driven by the linkage component are located on one side of the reciprocating component. A guide component is located on the pressurizing component. A drive component for rotating the rolling roller is located on the side of the storage tank. The reciprocating component drives the liquid outlet component to coat the slurry onto the battery electrode and smooths it with the rolling roller. When the liquid outlet component resets, the liquid outlet is closed by the drive of the guide component, and the slurry is further smoothed by the rolling roller.

[0008] As a preferred embodiment, the reciprocating assembly includes a first lead screw and a second lead screw rotatably mounted on a frame, a first motor mounted at the end of the first lead screw, and a first belt mounted between the first lead screw and the second lead screw.

[0009] As a preferred embodiment, the liquid outlet assembly further includes a liquid outlet located at the lower end of the liquid storage tank and an arc-shaped segment located on the side of the liquid outlet that is consistent with the arc surface of the rolling roller.

[0010] As a preferred embodiment, a rectangular cavity is provided on the other side of the liquid outlet, and a baffle strip is slidably disposed in the rectangular cavity, the baffle strip being connected to the rectangular cavity by a spring.

[0011] As a preferred embodiment, the linkage assembly includes a rotating rod respectively disposed on one side of the first lead screw and the second lead screw, a rectangular groove disposed on the rotating rod, a cam disposed on the rotating rod, a protrusion disposed on the inner side of the cam that cooperates with the rectangular groove, an arc-shaped protrusion disposed on both sides of the cam, and a first support rod respectively rotatably disposed on both sides of the arc-shaped protrusion.

[0012] As a preferred embodiment, a limiting rod is rotatably provided in the middle of the rolling roller, and the limiting rod is rotatably provided on the upper end face of the liquid storage tank.

[0013] As a preferred embodiment, the pressurizing assembly includes a pressurizing chamber fixedly disposed at the lower end of the limiting rod, a slot disposed at the lower end of the pressurizing chamber, a piston plate disposed within the pressurizing chamber, a one-way tube disposed on the side of the pressurizing chamber, and a second support rod disposed on the piston plate.

[0014] As a preferred embodiment, the guide assembly includes a guide rail mounted on the frame, a protruding section mounted on the guide rail, and guide plates mounted at both ends of the guide rail.

[0015] As another preferred embodiment, the drive assembly includes a T-slot disposed on the side of the liquid storage tank, a T-block slidably disposed in the T-slot, a connecting rod rotatably disposed on the T-block, and a second motor for driving the connecting rod to rotate.

[0016] The beneficial effects of this invention are:

[0017] In this invention, a liquid outlet component is provided at the lower end of the liquid storage tank, and a linkage component and a pressurizing component driven by the linkage component are provided on one side of the reciprocating component. The slurry can be discharged more quickly and quantitatively under the drive of the pressurizing component, and the slurry is evenly spread on the upper surface of the battery cell under the rolling roller.

[0018] In this invention, when the liquid outlet component is reset, the liquid outlet of the liquid outlet component is closed by the drive of the guide component, and the slurry is rolled out twice by the rolling roller, so that the slurry can adhere more firmly to the battery cell and the slurry is more uniform on the battery cell.

[0019] In summary, this equipment has the advantages of uniform and rapid laying and firm adhesion, and is especially suitable for the field of battery manufacturing technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the isometric structure of an automated surface coating device for battery current collectors;

[0022] Figure 2 A schematic cross-sectional view of an automated surface coating device for battery current collectors;

[0023] Figure 3 for Figure 2 Enlarged structural diagram of section A;

[0024] Figure 4 This is an isometric structural diagram of the linkage component;

[0025] Figure 5 This is a schematic diagram of the isometric structure of the cam.

[0026] Figure 6 A schematic diagram of the isometric structure of the guide assembly;

[0027] Figure 7 This is a schematic diagram of the isometric structure of the rolling mill roller;

[0028] Figure 8 This is a schematic diagram of the cross-sectional structure of the liquid outlet assembly;

[0029] Figure 9 for Figure 8 Enlarged structural diagram of section B;

[0030] Figure 10 This is a schematic diagram of the isometric structure of the drive component;

[0031] Figure 11 This is a diagram illustrating the working state of an automated surface coating device for battery current collectors.

[0032] In the diagram: 1-Frame; 2-Reciprocating assembly; 3-Liquid storage tank; 4-Liquid outlet assembly; 5-Linkage assembly; 6-Pressure assembly; 7-Guide assembly; 8-Drive assembly; 21-First lead screw; 22-Second lead screw; 23-First motor; 24-First belt; 41-Compactor roller; 42-Liquid outlet; 43-Arc-shaped section; 44-Rectangular cavity; 45-Baffle strip; 46-Spring; 47-Limiting rod; 51-Rotating rod; 52-Rectangular groove; 53-Cam; 54-Protrusion; 55-Arc-shaped protrusion; 56-First support rod; 57-Second belt; 61-Pressure chamber; 62-Groove opening; 63-Piston plate; 64-One-way tube; 65-Second support rod; 71-Guide rail; 72-Protruding section; 73-Guide plate; 81-T-slot; 82-T-block; 83-Connecting rod; 84-Second motor. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] Example 1

[0035] like Figures 1 to 11 As shown, an automated surface coating device for battery current collectors includes a frame 1. A reciprocating assembly 2 and a storage tank 3 driven by the reciprocating assembly 2 are symmetrically arranged on the frame 1. A liquid outlet assembly 4 is located at the lower end of the storage tank 3. The liquid outlet assembly 4 includes a rolling roller 41. A linkage assembly 5 and a pressurizing assembly 6 driven by the linkage assembly 5 are arranged on one side of the reciprocating assembly 2. A guide assembly 7 is arranged on the pressurizing assembly 6. A drive assembly 8 for rotating the rolling roller 41 is arranged on the side of the storage tank 3. The reciprocating assembly 2 drives the liquid outlet assembly 4 to coat the slurry onto the battery electrode and scrapes it smooth by the rolling roller 41. When the liquid outlet assembly 4 resets, the liquid outlet of the liquid outlet assembly 4 is closed by the drive of the guide assembly 7, and the slurry is further smoothed by the rolling roller 41.

[0036] In this embodiment, as Figure 4 As shown, the reciprocating assembly 2 includes a first lead screw 21 and a second lead screw 22 rotatably mounted on the frame 1, a first motor 23 disposed at the end of the first lead screw 21, and a first belt 24 disposed between the first lead screw 21 and the second lead screw 22. In this invention, the first motor 23 drives the first lead screw 21 to rotate, and the first belt 24 drives the second lead screw 22 to rotate.

[0037] It needs to be emphasized that, such as Figure 8 As shown, the liquid outlet assembly 4 also includes a liquid outlet 42 located at the lower end of the liquid storage tank 3 and an arc-shaped segment 43 located on the side of the liquid outlet 42 that is consistent with the arc surface of the rolling roller 41; a rectangular cavity 44 is provided on the other side of the liquid outlet 42, and a baffle strip 45 is slidably disposed in the rectangular cavity 44, and the baffle strip 45 is connected to the rectangular cavity 44 by a spring 46; in this invention, the slurry flows out from the liquid outlet 42, and the spring force of the spring 46 drives the baffle strip 45 to abut against the rolling roller 41 to prevent the slurry from flowing out from the other side of the rolling roller 41. The baffle strip 45 is made of rubber, which can better prevent the slurry from flowing out.

[0038] In addition, such as Figures 4 to 5 As shown, the linkage component 5 includes a rotating rod 51 respectively disposed on one side of the first lead screw 21 and the second lead screw 22, a rectangular groove 52 disposed on the rotating rod 51, a cam 53 disposed on the rotating rod 51, a protrusion 54 disposed on the inner side of the cam 53 and cooperating with the rectangular groove 52, an arc-shaped protrusion 55 disposed on both sides of the cam 53, and a first support rod 56 respectively rotatably disposed on both sides of the arc-shaped protrusion 55. In this invention, the rotation of the first lead screw 21 and the second lead screw 22 drives the rotating rod 51 to rotate. Under the clamping action of the first support rod 56, the cam 53 is driven to move on the rotating rod 51. Under the mutual cooperation of the protrusion 54 and the rectangular groove 52, the cam 53 can rotate when moving left and right.

[0039] Furthermore, such as Figure 7 As shown, a limiting rod 47 is rotatably provided in the middle of the rolling roller 41, and the limiting rod 47 is rotatably provided on the upper end face of the liquid storage tank 3.

[0040] It needs to be emphasized that, such as Figure 8 As shown, the pressurizing assembly 6 includes a pressurizing chamber 61 fixedly disposed at the lower end of the limiting rod 47, a slot 62 disposed at the lower end of the pressurizing chamber 61, a piston plate 63 disposed inside the pressurizing chamber 61, a one-way pipe 64 disposed on the side of the pressurizing chamber 61, and a second support rod 65 disposed on the piston plate 63. In this invention, the second support rod 65 is intermittently squeezed by the rotation of the cam 53, and the second support rod 65 squeezes the piston plate 63 downward, thereby causing the slurry to flow out from the pressurizing chamber 61 through the outlet 42. It is worth mentioning that a one-way valve is provided on the one-way pipe 64.

[0041] In addition, such as Figure 6As shown, the guide assembly 7 includes a guide rail 71 mounted on the frame 1, a protruding section 72 mounted on the guide rail 71, and guide plates 73 mounted at both ends of the guide rail 71. In this invention, the limiting rod 47 moves on the guide rail 71. When it passes the protruding section 72, the crushing roller 41 blocks the liquid outlet 42, and the guide plate 73 can prevent the limiting rod 47 from moving in the opposite direction.

[0042] Furthermore, such as Figure 10 As shown, the drive assembly 8 includes a T-shaped groove 81 disposed on the side of the storage tank 3, a T-shaped block 82 slidably disposed in the T-shaped groove 81, a connecting rod 83 rotatably disposed on the T-shaped block 82, and a second motor 84 for driving the connecting rod 83 to rotate; in this invention, by moving the T-shaped block 82 in the T-shaped groove 81, the slurry can be prevented from flowing out from the side.

[0043] Work process

[0044] The second motor 84 is started, driving the crushing roller 41 to rotate; the first motor 23 is started, driving the first lead screw 21 to rotate, which in turn drives the second lead screw 22 to rotate via the first belt 24; the rotation of the first lead screw 21 and the second lead screw 22 drives the rotating rod 51 to rotate, and the cam 53 moves on the rotating rod 51 under the clamping action of the first support rod 56. With the cooperation of the protrusion 54 and the rectangular groove 52, the cam 53 can rotate when moving left and right; the rotation of the cam 53 intermittently squeezes the second support rod 65, and the second support rod 65 squeezes the piston plate 63 downward, thereby causing the slurry to flow out from the pressurizing chamber 61 through the liquid outlet 42. The crushing roller 41 spreads the slurry evenly on the upper surface of the battery cell; when the storage tank 3 is reset, the limiting rod 47, under the action of the guide rail 71, passes through the protrusion section 72, and the crushing roller 41 blocks the liquid outlet 42, and the crushing roller 41 crushes the slurry a second time.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automated surface coating apparatus for battery current collectors, comprising a frame (1), characterized in that: The frame (1) is symmetrically provided with a reciprocating assembly (2) and a liquid storage tank (3) driven by the reciprocating assembly (2). The lower end of the liquid storage tank (3) is provided with a liquid outlet assembly (4). The liquid outlet assembly (4) includes a rolling roller (41). A linkage assembly (5) and a pressurizing assembly (6) driven by the linkage assembly (5) are provided on one side of the reciprocating assembly (2). A guide assembly (7) is provided on the pressurizing assembly (6). A drive assembly (8) for driving the rolling roller (41) to rotate is provided on the side of the liquid storage tank (3). The reciprocating assembly (2) is used to drive the liquid outlet assembly (4) to coat the slurry onto the battery electrode and scrape it flat by the rolling roller (41). When the liquid outlet assembly (4) is reset, the liquid outlet of the liquid outlet assembly (4) is closed by the drive of the guide assembly (7) and the slurry is rolled flat again by the rolling roller (41).

2. The automated surface coating device for a battery current collector according to claim 1, characterized in that, The reciprocating assembly (2) includes a first lead screw (21) and a second lead screw (22) rotatably mounted on the frame (1), a first motor (23) mounted at the end of the first lead screw (21), and a first belt (24) mounted between the first lead screw (21) and the second lead screw (22).

3. The automated surface coating device for a battery current collector according to claim 1, characterized in that, The liquid outlet assembly (4) also includes a liquid outlet (42) located at the lower end of the liquid storage tank (3) and an arc-shaped section (43) located on the side of the liquid outlet (42) that is consistent with the arc surface of the rolling roller (41).

4. The automated surface coating device for a battery current collector according to claim 3, characterized in that, A rectangular cavity (44) is provided on the other side of the liquid outlet (42). A baffle strip (45) is slidably provided in the rectangular cavity (44). The baffle strip (45) is connected to the rectangular cavity (44) by a spring (46).

5. The automated surface coating device for a battery current collector according to claim 1, characterized in that, The linkage assembly (5) includes a rotating rod (51) respectively disposed on one side of the first lead screw (21) and the second lead screw (22), a rectangular groove (52) disposed on the rotating rod (51), a cam (53) disposed on the rotating rod (51), a protrusion (54) disposed on the inner side of the cam (53) and cooperating with the rectangular groove (52), an arc-shaped protrusion (55) disposed on both sides of the cam (53), a first support rod (56) respectively rotatably disposed on both sides of the arc-shaped protrusion (55), and a second belt (57) respectively disposed between the first lead screw (21), the second lead screw (22) and the rotating rod (51).

6. The automated surface coating device for a battery current collector according to claim 1, characterized in that, A limiting rod (47) is rotatably provided in the middle of the rolling roller (41), and the limiting rod (47) is rotatably provided on the upper end face of the liquid storage tank (3).

7. The automated surface coating device for a battery current collector according to claim 1, characterized in that, The pressurizing assembly (6) includes a pressurizing chamber (61) fixedly disposed at the lower end of the limiting rod (47), a slot (62) disposed at the lower end of the pressurizing chamber (61), a piston plate (63) disposed in the pressurizing chamber (61), a one-way tube (64) disposed on the side of the pressurizing chamber (61), and a second support rod (65) disposed on the piston plate (63).

8. An automated surface coating device for a battery current collector according to claim 1, characterized in that, The guide assembly (7) includes a guide rail (71) mounted on the frame (1), a protrusion (72) mounted on the guide rail (71), and guide plates (73) mounted at both ends of the guide rail (71).

9. An automated surface coating device for a battery current collector according to claim 1, characterized in that, The drive assembly (8) includes a T-slot (81) disposed on the side of the liquid storage tank (3), a T-block (82) slidably disposed in the T-slot (81), a connecting rod (83) rotatably disposed on the T-block (82), and a second motor (84) for driving the connecting rod (83) to rotate.

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