A solution of lithium white spot defects eliminating device of copper foil

Abstract

The utility model discloses a kind of eliminate lithium battery copper foil solution white spot defect's liquid return device, belong to lithium battery copper foil surface appearance quality improvement technical field, solve the problem that the cathode roller is adopted after spraying acid to eliminate white spot currently, the utility model anode groove both sides horizontal movement is equipped with liquid guide plate, liquid guide plate includes first liquid guide plate and second liquid guide plate, first liquid guide plate is flush with anode groove side horizontal plane, second liquid guide plate end portion is towards downwards, and the included angle with first liquid guide plate is 170 °.The utility model simple structure, convenient to dismount, white spot on foil surface can be effectively prevented to generate, the problem that the oxidation speed of cathode roller is fast brought by white spot elimination in the mode of traditional after spraying acid can also be avoided, improve lithium battery copper foil quality, also prolong the service period of cathode roller.

Description

Technical Field

[0001] This utility model belongs to the technical field of improving the surface appearance quality of lithium battery copper foil, specifically relating to a liquid return device for eliminating white spot defects in lithium battery copper foil solution. Background Technology

[0002] Lithium-ion battery copper foil is a material used in battery manufacturing and plays a crucial role in the process. As a "current collector," it effectively connects the positive and negative terminals of the battery to form a closed circuit, enabling the battery to charge and discharge. The surface appearance quality of the lithium-ion battery copper foil has a vital impact on the continuity and safety of battery charging and discharging.

[0003] In the actual production process of lithium-ion battery copper foil, when the cathode roller enters the electrolyte surface, it is easily contaminated by liquid splashing from the anode tank during solution reflux, resulting in localized contamination of the cathode roller surface and the formation of corresponding white spots on the copper foil surface. The traditional method to eliminate these white spots is to install an acid spraying device at the rear end of the cathode roller, using copper sulfate solution to continuously rinse the cathode roller surface to ensure its consistency. However, this method has drawbacks: the addition of the acid spraying device alters the surface condition of the cathode roller, affecting the surface roughness of the copper foil and reducing its performance. Furthermore, uneven spraying leads to color differences and oxidation defects in the copper foil. Therefore, a liquid return device is proposed to eliminate the white spot defects in lithium-ion battery copper foil solution and solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a liquid return device for eliminating white spot defects in lithium battery copper foil solution, thereby solving the problem of currently using post-positioned acid spraying on the cathode roller to eliminate white spots.

[0005] The technical solution of this utility model is: a liquid return device for eliminating white spot defects in lithium battery copper foil solution, including an anode tank, with liquid guide plates horizontally and movably arranged on both sides of the anode tank. The liquid guide plates include a first liquid guide plate and a second liquid guide plate. The first liquid guide plate is flush with the horizontal plane of the side of the anode tank, and the end of the second liquid guide plate faces downward, with an angle of 170° with the first liquid guide plate.

[0006] As a further improvement of this utility model, sleeves are provided at both ends of the anode tank side, and multiple arc-shaped buckles are provided on the side of the first liquid guide plate. A movable connecting rod is rotatably inserted inside the buckle, and both ends of the movable connecting rod are locked inside the sleeve.

[0007] As a further improvement of this utility model, a plurality of support rods are provided below the end of the second liquid guide plate.

[0008] As a further improvement of this utility model, a set screw is provided at the connection between the movable connecting rod and the sleeve.

[0009] As a further improvement of this utility model, multiple liquid guide plates are provided at intervals.

[0010] The beneficial effects of this utility model are as follows: The sleeve is welded and installed on the side wall of the anode tank to fix the movable connecting rod that runs through the anode tank. A set screw is installed on the sleeve to secure the movable connecting rod. Then, the guide plates are sequentially installed on the movable connecting rods using clips. The front end of the guide plate is seamlessly connected to the upper edge of the anode tank, and the rear support rod of the guide plate is located inside the return tank. After installation, multiple guide plates are on the same horizontal plane, allowing the solution to flow smoothly from the anode tank to the return port.

[0011] This invention eliminates the possibility of liquid droplets or foam contamination of the cathode roller caused by solution overflow at the source. It has a simple structure and is easy to disassemble and assemble. It can effectively prevent the generation of white spots on the foil surface and avoid the problem of rapid oxidation of the cathode roller caused by the traditional method of removing white spots by post-acid spraying. While improving the quality of lithium battery copper foil, it also extends the service life of the cathode roller. Attached Figure Description

[0012] Figure 1 This is a front view of the structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 This is a top view of the structure of this utility model; Figure 4 for Figure 3 Schematic diagram of the structure at point B.

[0013] In the diagram: 1-Anode tank; 2-Sleeve; 3-Top screw; 4-Modible connecting rod; 5-Guide plate; 6-First guide plate; 7-Second guide plate; 8-Support rod; 9-Snap fastener. Detailed Implementation

[0014] like Figures 1-4 As shown, a liquid return device for eliminating white spot defects in lithium battery copper foil solution includes an anode tank. Liquid guide plates 5 are horizontally and movably arranged on both sides of the anode tank 1. The liquid guide plates 5 include a first liquid guide plate 6 and a second liquid guide plate 7. The first liquid guide plate 6 is flush with the horizontal plane of the side of the anode tank 1, and the end of the second liquid guide plate 7 faces downward, with an angle of 170° with the first liquid guide plate 6.

[0015] The anode tank 1 has sleeves 2 at both ends on its side, and the first liquid guide plate 6 has multiple arc-shaped buckles 9 on its side. A movable connecting rod 4 is rotatably inserted inside the buckle 9, and both ends of the movable connecting rod 4 are locked inside the sleeve 2.

[0016] Multiple support rods 8 are provided below the end of the second liquid guide plate 7. A set screw 3 is provided at the connection between the movable connecting rod 4 and the sleeve 2. Multiple liquid guide plates 5 are spaced apart.

[0017] Example 1 The anode tank 1 is supported and fixed on the foil-making machine frame. A sleeve 2 is installed inside the anode tank 1 to fix the movable connecting rod 4. The movable connecting rod 4 extends through both sides of the anode tank 1 and is connected to the liquid guide plate 5 via a snap-fit ​​9. The liquid guide plate 5 consists of two pieces connected by welding. The first liquid guide plate 6 and the second liquid guide plate 7 are not on the same horizontal plane; their included angle is 170°. That is, the first liquid guide plate 6 is parallel to the zero plane of the anode tank 1, and the second liquid guide plate 7 has an included angle of 10° with the zero plane of the anode tank 1, so that the overflowing solution in the anode tank 1 can flow out smoothly. Three liquid guide plates 5 are horizontally assembled inside the anode tank 1, with two support rods 8 below each second liquid guide plate 7.

[0018] The fixed sleeve 2 set on the anode tank 1 is composed of a titanium tube with a diameter of DN40 and a length of 35mm. The titanium tube is welded and fixed on the left and right sides of the anode tank 1. The titanium tube has a threaded through hole, which is threaded and equipped with a set screw 3. The set screw 3 is used to fix the movable connecting rod 4.

[0019] The movable connecting rod 4 is made of DN25CPVC pipe with a length of 1550mm. The two ends of the movable connecting rod are installed in the sleeves 2 on both sides of the anode tank 1 and fixed with set screws 3 to prevent the liquid guide plate 5 from shifting and causing certain damage to the cathode roller.

[0020] The liquid guiding plate 5 is welded together from a CPVC plate with a wall thickness of 5mm, a length of 500mm and a width of 120mm and a CPVC plate with a thickness of 5mm, a length of 500mm and a width of 280mm. The first liquid guiding plate 6 and the second liquid guiding plate 7 are not on the same horizontal plane and their included angle is 170°.

[0021] The first liquid guide plate 6 is provided with a CPVC arc-shaped buckle 9 at the lower front end, which is used to fix the first liquid guide plate 6 to the movable connecting rod 4. Several CPVC arc-shaped buckles 9 are on the same generatrix of the first liquid guide plate 6. The CPVC arc-shaped buckles 9 are semi-circular and have a diameter of 32mm.

[0022] Multiple support rods 8 are installed below the second liquid guide plate 7. The support rods 8 are made of DN25CPVC pipe and have a height of 200mm.

[0023] This device consists of three liquid guiding plates 5 of the same size, with a spacing of 5mm between them, and they are connected as a whole by movable connecting rods 4.

[0024] Sleeve 2 is welded and installed on the side wall of anode tank 1, located 100mm from the cathode roller outlet of anode tank 1. Movable connecting rod 4 runs through the entire anode tank 1 and is installed inside sleeve 2. Set screw 3 is installed on sleeve 2 to fix movable connecting rod 4. Then, liquid guide plates 5 are installed on movable connecting rod 4 one by one through buckles 9. The front end of liquid guide plate 5 is seamlessly connected to the upper edge of anode tank 1, and the rear end support rod 8 of liquid guide plate 5 is located in return liquid tank. After installation, the three liquid guide plates 5 are on the same horizontal plane so that the solution overflows from anode tank 1 and flows smoothly to return liquid port.

Claims

1. A liquid return device for eliminating white spot defects in lithium battery copper foil solution, comprising an anode tank, characterized in that: The anode tank (1) is provided with horizontally movable guide plates (5) on both sides. The guide plates (5) include a first guide plate (6) and a second guide plate (7). The first guide plate (6) is flush with the horizontal side of the anode tank (1), and the end of the second guide plate (7) faces downward, with an angle of 170° with the first guide plate (6).

2. The liquid return device for eliminating white spot defects in lithium battery copper foil solution according to claim 1, characterized in that: The anode tank (1) has sleeves (2) at both ends on its side. The first liquid guide plate (6) has multiple arc-shaped buckles (9) on its side. A movable connecting rod (4) is rotatably inserted inside the buckle (9). Both ends of the movable connecting rod (4) are locked inside the sleeve (2).

3. A liquid return device for eliminating white spot defects in lithium battery copper foil solution according to claim 1 or 2, characterized in that: Multiple support rods (8) are provided below the end of the second liquid guide plate (7).

4. The liquid return device for eliminating white spot defects in lithium battery copper foil solution according to claim 2, characterized in that: The movable connecting rod (4) is provided with a set screw (3) at the connection between it and the sleeve (2).

5. The liquid return device for eliminating white spot defects in lithium battery copper foil solution according to claim 4, characterized in that: The liquid guide plate (5) is provided at intervals.

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