An apparatus and method for resolving etch roller marks with a cleaning roller

Abstract

The application discloses a device for cleaning a roller for solving the problem of roller printing in etching, which comprises a cleaning box, a first cleaning tank, a second cleaning tank, a bubble generator, an ultrasonic wave emitter, an alcohol constant pressure tank, a hydrochloric acid constant pressure tank, a hydrogen peroxide constant pressure tank, a mechanical hand, a roller hanging basket and a PLC, and can automatically clean the roller. Meanwhile, the application also discloses a method for cleaning the roller for solving the problem of roller printing in etching, which is specially processed according to the production characteristics of topcon cells and the specific pollutant properties, can efficiently clean the polluted roller in the production process of topcon cells, can effectively improve the product quality, reduce the generation of rework pieces, improve the yield and conversion efficiency of solar cell pieces, and has a wide application prospect in the field of solar cells.

Description

Technical Field

[0001] This invention relates to the field of wet removal of PSG and BSG from solar Topcon cells, and particularly to an apparatus and method for cleaning rollers to remove etching roller marks. Background Technology

[0002] As the photovoltaic market demands increasingly higher module power, cell technology continues to innovate. Ordinary monocrystalline cells have gradually been phased out of the market due to their low efficiency. This has led to the widespread adoption of monocrystalline TOPCON technology. TOPCON technology uses a wet chain conveyor to remove PSG and BSG from the front and back of the cells. The chain conveyor process uses rollers to transport the cells. After a certain production cycle, these rollers accumulate a lot of foreign matter, which cannot be washed away with water. Wiping with a lint-free cloth only makes the cells dirtier. If not cleaned properly, the foreign matter will adhere to the cells after passing through the rollers, creating roller marks, reducing the yield rate of the cells, and even decreasing the conversion efficiency. Summary of the Invention

[0003] Purpose of the invention To address the problem of contaminated rollers in the existing TOPCON battery production process, which are difficult to clean and affect the yield and energy conversion efficiency of battery cells, this invention proposes a device and method for cleaning rollers to remove etching marks.

[0004] Technical solution On one hand, the present invention proposes a device for cleaning rollers to solve the problem of etching roller marks, including a cleaning tank, a first cleaning tank, a second cleaning tank, a bubble generator, an ultrasonic transmitter, an alcohol constant pressure tank, a hydrochloric acid constant pressure tank, a hydrogen peroxide constant pressure tank, a robotic arm, a roller basket, and a PLC. The first and second cleaning tanks are both located at the bottom of the cleaning tank. The bubble generator and the ultrasonic transmitter are both installed in the first cleaning tank. The alcohol constant pressure tank, the hydrochloric acid constant pressure tank, and the hydrogen peroxide constant pressure tank are all installed on the inner wall of the cleaning tank. A first solenoid valve is provided at the end of the alcohol constant pressure tank, a second solenoid valve is provided at the end of the hydrochloric acid constant pressure tank, and a third solenoid valve is provided at the end of the hydrogen peroxide constant pressure tank. The first solenoid valve points to the first cleaning tank, and the second and third solenoid valves both point to the second cleaning tank. The robotic arm is installed at the top of the cleaning tank, and the gripper at the end of the robotic arm is fixedly connected to the roller basket. The first solenoid valve, the second solenoid valve, the third solenoid valve, the bubble generator, and the ultrasonic generator are all electrically connected to the PLC.

[0005] On the other hand, the present invention proposes a method for cleaning rollers to solve etching roller marks, comprising the following steps: S1 Remove the roller, place the roller in the roller basket, and use the PLC to control the robot arm to place the roller basket into the first cleaning tank; S2 injects clean water into the first cleaning tank and controls the first solenoid valve to open via PLC to inject alcohol into the first cleaning tank; S3 uses PLC to control the bubble generator and ultrasonic generator to perform ultrasonic bubble cleaning on the roller. This step takes 4 hours. After completion, the waste liquid in the first cleaning tank is drained. S4 Rinse the rollers with clean water to remove foreign matter and alcohol, and keep the pH value of the liquid in the first cleaning tank neutral. S5 uses a PLC-controlled robotic arm to place the rollers into the second cleaning tank. The PLC-controlled second and third solenoid valves are opened to inject hydrochloric acid and hydrogen peroxide into the second cleaning tank. The tank is then acid-soaked for 4 hours. After completion, the waste liquid in the second cleaning tank is drained. S6 Rinse the rollers with clean water to remove foreign matter and waste liquid, and keep the liquid in the second cleaning tank at a neutral pH value; S7 Remove the rollers and dry them to complete the cleaning process.

[0006] Furthermore, the alcohol concentration in step S2 should be controlled between 60% and 80%.

[0007] Furthermore, in step S5, the molar ratio of hydrogen chloride to hydrogen peroxide in the mixed solution of hydrochloric acid and hydrogen peroxide is 28:25, and the concentration of hydrogen chloride should be controlled between 25% and 40%.

[0008] Beneficial effects This invention can efficiently clean contaminated rollers in the production process of Topcon batteries, effectively improving product quality, reducing the generation of reworked cells, and increasing the yield and conversion efficiency of solar cells. It has broad application prospects in the field of solar cells. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the steps of the present invention; Among them, 1-cleaning tank, 2-first cleaning tank, 3-second cleaning tank, 4-bubble generator, 5-ultrasonic transmitter, 6-alcohol constant pressure tank, 7-hydrochloric acid constant pressure tank, 8-hydrogen peroxide constant pressure tank, 9-robotic arm, 10-roller basket. Detailed Implementation

[0010] To enable those skilled in the art to better understand the present invention, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0011] Example like Figure 1As shown, a device for cleaning rollers to remove etching marks includes a cleaning tank, a first cleaning tank, a second cleaning tank, a bubble generator, an ultrasonic transmitter, an alcohol constant pressure tank, a hydrochloric acid constant pressure tank, a hydrogen peroxide constant pressure tank, a robotic arm, a roller basket, and a PLC. The first and second cleaning tanks are both located at the bottom of the cleaning tank. The bubble generator and ultrasonic transmitter are both installed in the first cleaning tank. The alcohol, hydrochloric acid, and hydrogen peroxide constant pressure tanks are all installed on the inner wall of the cleaning tank. A first solenoid valve is installed at the end of the alcohol constant pressure tank, a second solenoid valve at the end of the hydrochloric acid constant pressure tank, and a third solenoid valve at the end of the hydrogen peroxide constant pressure tank. The first solenoid valve points towards the first cleaning tank, and the second and third solenoid valves both point towards the second cleaning tank. The robotic arm is installed at the top of the cleaning tank, and its end gripper is fixedly connected to the roller basket. The first, second, and third solenoid valves, the bubble generator, and the ultrasonic generator are all electrically connected to the PLC.

[0012] like Figure 2 As shown, a method for cleaning rollers to remove etching roller marks includes the following steps: S1 Remove the roller, place the roller in the roller basket, and use the PLC to control the robot arm to place the roller basket into the first cleaning tank; S2 injects clean water into the first cleaning tank, and controls the first solenoid valve to open via PLC to inject alcohol into the first cleaning tank, with the alcohol concentration controlled at 75%; S3 uses PLC to control the bubble generator and ultrasonic generator to perform ultrasonic bubble cleaning on the roller. This step takes 4 hours. After completion, the waste liquid in the first cleaning tank is drained. S4 Rinse the rollers with clean water to remove foreign matter and alcohol, and keep the pH value of the liquid in the first cleaning tank neutral. S5 uses a PLC-controlled robotic arm to place the rollers into the second cleaning tank. The PLC also controls the opening of the second and third solenoid valves to inject hydrochloric acid and hydrogen peroxide into the second cleaning tank. The ratio of hydrogen chloride to hydrogen peroxide in the mixed solution of hydrochloric acid and hydrogen peroxide is 28:25, and the concentration of hydrogen chloride is controlled at around 30%. The tank is then soaked in acid for 4 hours. After completion, the waste liquid in the second cleaning tank is drained. S6 Rinse the rollers with clean water to remove foreign matter and waste liquid, and keep the liquid in the second cleaning tank at a neutral pH value; S7 Remove the rollers and dry them to complete the cleaning process.

[0013] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for cleaning rollers to remove etching roller marks, characterized in that, Includes the following steps: S1 Remove the roller, place the roller in the roller basket, and use the PLC to control the robot arm to place the roller basket into the first cleaning tank; S2 injects clean water into the first cleaning tank and controls the first solenoid valve to open via PLC to inject alcohol into the first cleaning tank; S3 uses PLC to control the bubble generator and ultrasonic generator to perform ultrasonic bubble cleaning on the roller. This step takes 4 hours. After completion, the waste liquid in the first cleaning tank is drained. S4 Rinse the rollers with clean water to remove foreign matter and alcohol, and keep the pH value of the liquid in the first cleaning tank neutral. S5 uses a PLC-controlled robotic arm to place the rollers into the second cleaning tank. The PLC also controls the opening of the second and third solenoid valves to inject hydrochloric acid and hydrogen peroxide into the second cleaning tank. The tank is then soaked in acid for 4 hours. After completion, the waste liquid in the second cleaning tank is drained. In the mixed solution of hydrochloric acid and hydrogen peroxide, the molar ratio of hydrogen chloride to hydrogen peroxide is 28:25, and the concentration of hydrogen chloride should be controlled between 25% and 40%. S6 Rinse the rollers with clean water to remove foreign matter and waste liquid, and keep the liquid in the second cleaning tank at a neutral pH value; S7 Remove the rollers and dry them to complete the cleaning process.

2. The method for cleaning a cleaning roller to remove etching roller marks according to claim 1, characterized in that: In step S2, the concentration of alcohol should be controlled between 60% and 80%.

3. An apparatus for cleaning a cleaning roller to remove etching roller marks, comprising implementing the method for cleaning a cleaning roller to remove etching roller marks as described in claim 1 or 2, characterized in that: The system includes a cleaning tank, a first cleaning tank, a second cleaning tank, a bubble generator, an ultrasonic transmitter, an alcohol constant pressure tank, a hydrochloric acid constant pressure tank, a hydrogen peroxide constant pressure tank, a robotic arm, a roller basket, and a PLC. The first and second cleaning tanks are located at the bottom of the cleaning tank. The bubble generator and ultrasonic transmitter are installed in the first cleaning tank. The alcohol, hydrochloric acid, and hydrogen peroxide constant pressure tanks are installed on the inner wall of the cleaning tank. A first solenoid valve is installed at the end of the alcohol constant pressure tank, a second solenoid valve at the end of the hydrochloric acid constant pressure tank, and a third solenoid valve at the end of the hydrogen peroxide constant pressure tank. The first solenoid valve points towards the first cleaning tank, and the second and third solenoid valves both point towards the second cleaning tank. The robotic arm is installed at the top of the cleaning tank, and its end gripper is fixedly connected to the roller basket. The first, second, and third solenoid valves, the bubble generator, and the ultrasonic generator are all electrically connected to the PLC.

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