Photovoltaic cell water film water scraping device

Abstract

The invention discloses a photovoltaic cell water film water scraping device. The water scraping device comprises a workbench, a water scraping knife, an electric push rod and a water knife device, the top of the workbench is fixedly connected with a back plate, the outer portion of the back plate is provided with the water knife device and the water scraping knife, the outer portion of the back plate is fixedly connected with the electric push rod, and the bottom of the electric push rod is provided with a telescopic rod. According to the photovoltaic cell water film water scraping device, the water knife device and the water scraping knife are integrated together, the problem that a traditional photovoltaic cell water film is too thick is well solved, water film protection can be achieved, black edges are prevented from being excessively etched, the thickness and the water amount of the water film can be reduced, and the risks of electric leakage and low efficiency caused by incomplete etching are reduced; and meanwhile, the electric push rod is arranged at the top of the wiper blade, so that the height of the water scraping knife can be adjusted in the application process, the height of the water scraping knife can be conveniently adjusted, the risk of insufficient etching of a battery piece is greatly reduced, the overall structure is simple, the functionality is high, andthe use is very convenient.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cell production, in particular to a photovoltaic cell water film wiper device. Background technique [0002] In the production process of photovoltaic cells, there is a process called etching process. The purpose of this process is to clean and remove the N-layer phosphorus on the edge after diffusion with mixed acid, so as to ensure that the positive and negative electrodes of the battery are not conductive after printing, and prevent short circuit of the battery. When etching, only the edge is etched, so the battery is in a floating state in the etching tank, and it is easy to have too much liquid on the battery, and there will be over-etched black edges, which will affect the power and appearance of the battery. In order to avoid this situation, the water film device mainly adds a water knife before etching, and covers a layer of water film on the surface of the cell before entering the et...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a photovoltaic cell water film wiper device, which solves the problem that most of the solar cells on the market cannot control the thickness of the water film when the water film is covered by a water knife. This also leads to a large amount of water in the water film when the battery is etched, and the thickness of the water film is relatively thick, so that the mixed acid liquid cannot quickly react with the edge of the battery. Due to the large amount of water in the water film, the mixed acid cannot Complete contact with the edge of the cell, or the acid content at the junction of the mixed acid and the water film is diluted by water, there will be shallow or no corrosion on the edge of the cell, and the positive and negative electrodes at the edge will be connected during the cell test, resulting in battery failure , edge leakage, there is too thick a water film to cause insufficient etching or engraving, which is more troublesome in application

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