Mechanically-agitating type liquid-replenishing device for wool-making groove

Abstract

The invention discloses a mechanically-agitating type liquid-replenishing device for a wool-making groove, which comprises a liquid storing tank, liquid conveying pipes, a liquid replenishing pump, a one-way valve, a flow meter and a wool-making groove, wherein the liquid replenishing pump, the one-way valve and the flow meter are serially connected through the liquid conveying pipe and then arranged between the liquid storing tank and the wool-making groove, a liquid sucking hole of the liquid replenishing pump is communicated with the bottom of the liquid storing tank through the liquid conveying pipe, a liquid outlet of the flow meter is communicated into the wool-making groove through the liquid conveying pipe, and an electric agitating rod is arranged in the liquid storing tank. Because the electric agitating rod is additionally arranged in the liquid storing tank and is controlled to be started for agitating 3-5min before the liquid replenishing pump pumps, the electric agitating rod can be used for uniformly agitating a chemical reagent in the liquid storing tank to ensure that the upper concentration and the lower concentration of the chemical agent in the liquid storing tank are uniform, the concentrations of chemical agents replenished in the wool-making groove every time are ensured to be equal, the wool-making solution in the wool-making groove meets the process requirement, and thus, the stability of the wool-making process is improved and the wool-making quality of a silicon wafer is ensured.

Description

Technical field: [0001] The invention relates to texturing equipment in the production of solar cells, in particular to a liquid replenishing device on the texturing equipment. Background technique: [0002] In the production process of solar cells, the preparation of the textured structure is an important step to increase the light absorption rate of the cell. The ideal suede structure helps to improve the performance of the battery. Due to the multiple reflections and refractions of the incident light on the surface of the silicon wafer, the absorption of light is increased, and its reflectivity is very low, which is mainly reflected in the increase of the short-circuit current. The preparation of the so-called suede structure is to use chemical corrosive agents such as sodium hydroxide diluent, ethylenediamine and phosphoquinone water, and ethanolamine aqueous solution to carry out suede treatment on the surface of the silicon wafer. After the treatment, the surface of t...

AI Technical Summary

Problems solved by technology

Because the chemical reagent solution contains multiple chemicals and water, stratification will occur after standing still for a long time, thereby causing the concentration of the chemical reagent solution at the bottom of the liquid storage tank 1 to be higher than the concentration at the top, so that the supplemented in different periods The concentration of the chemical reagent solution is different, which affects the stability of the texturing process

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