A filter barrel for solar cell manufacturing process

Abstract

The invention discloses a filter vat for preparation of solar batteries. The filter vat comprises a housing, an upper cover, a filter cylinder, a liquid inlet joint and a liquid outlet joint which are made of nonmetallic materials, wherein the filter cylinder is arranged in the housing, and comprises a cylindrical filter element, an upper pressure plate and a lower pressure plate; the upper pressure plate and the lower pressure plate are arranged on two sides of the filter element respectively; a non-return baffle is arranged between the lower pressure plate and the filter cylinder; the liquid inlet joint is arranged at the bottom of the housing; the liquid outlet joint is arranged on the side wall of the housing. The filter vat is suitable for filtration of liquids used for etching, texturing and cleaning during the preparation of the solar batteries, and can be used for effectively filtering out impurities from the liquids, so as to improve the product qualified rate of the solar batteries. All the parts of the filter vat are made of the nonmetallic materials, so that the filter vat can be applied to most corrosive environments.

Description

technical field [0001] The invention relates to the field of liquid filtration, in particular to a filter bucket used in solar cell manufacturing processes. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. At this stage, thin-film solar cells that work on the radio and television effect are the mainstream. The principle is that sunlight shines on the semiconductor PN junction to form new hole-electron pairs. Under the action of the PN junction electric field, the photogenerated holes flow from the N region to the P region. In the region, photoelectrons flow from the P region to the N region, and a current is formed after the circuit is turned on. Due to the protection of the environment and the huge demand for renewable and clean energy in various countries, solar cells have opened up broad prospects for the large-scale use of solar energy in the future...

AI Technical Summary

Problems solved by technology

[0005] In the preparation process of solar cells, etching, texturing and cleaning are all critical. At present, silver paste and screen are the most costly parts in the production process of monocrystalline silicon or polycrystalline silicon solar cells. The screen printing process will produce debris. Small fragments splash into the printing paste, and the fragmented paste will puncture the screen when printing again, and then leak the paste, resulting in defective products

Therefore, the slurry that is suspected of jumping into the debris can only be discarded in production, which causes a large amount of slurry waste and greatly increases the production cost

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