Solar cell acid etching reworking method and chain equipment used by same

Abstract

The invention relates to a solar cell acid etching reworking method and chain equipment used by the same. The solar cell acid etching reworking method includes the steps of primary acid pickling, primary rinsing, alkaline wash, secondary rinsing, secondary acid pickling, tertiary rinsing and blow-drying; coated reworking slices are subjected to hydrofluoric acid decoating before acid etching treatment of the chain equipment; preparation is performed after acid etching treatment. Total etching weight of each silicon slice subjected to acid etching treatment is 0.2-0.3g. The solar cell acid etching reworking method and the chain equipment used by the same are used for a solar cell production process and have the advantages that reworking caused by fingerprint, dirty, stains, coated aberration, abnormal process reworking and original silicon slice incoming material abnormality are solved, reworking is performed according to the method, reworked battery cells are normal in appearance to meet qualified product requirements and are as same as or lower than normal battery cells in efficiency by not more than 0.1%, and simplicity in process route and batch production can be achieved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to the field of solar cell production rework, and specifically refers to a solar cell acid corrosion rework method and chain equipment used. Background technique [0002] In the current production process of crystalline silicon cells, the rework sheets produced before screen printing need to be reworked due to internal factors such as color difference, color spots and other internal factors such as abnormal process control parameters. The rework ratio is between 1% and 2%, and then reworked Make qualified solar cells. For a medium-scale battery factory (10 production lines), the general daily production capacity is 300,000 pieces, and 3,000 to 6,000 pieces of reworked pieces will inevitably be produced every day, and silicon wafers account for more than 60% of the total cost of solar cells. . If these silicon wafers are not reworked and directly made into batteries, they will be degrade...

AI Technical Summary

Problems solved by technology

The method disclosed in Patent No. 1 is aimed at the rework method of battery slices in a special passivation battery process route. This method is aimed at the rework of the process where the passivation layer has been plated. All links and various types of rework sheets of solar cells in various process routes before screen printing and polycrystalline solar cells before silk screen printing can be reworked by the method of the present invention; secondly, the patented The process parameters, process route and process time of the disclosed method are relatively cumbersome, not as simple as the method of the present invention, and the process route and method of the two are different at the same time

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