Water-removing apparatus for water film of photovoltaic cell

Abstract

The invention discloses a water-removing apparatus for a water film of a photovoltaic cell. The water-removing apparatus comprises an etching groove body which is constituted by two correspondingly-arranged groove walls and multiple connecting rods mounted between the lower ends of the two groove walls, wherein the connecting rods are provided with rolling wheels for pushing the photovoltaic cells to enter the etching groove body; the photovoltaic cells are placed on the corresponding rolling wheels; and a water feeding knife for covering the water film for each photovoltaic cell and a water removing knife, behind the water-feeding knife, for reducing water from the water film are fixedly mounted at the upper end, entering the inlet of the etching groove body, of the photovoltaic cells. By adoption of the water-removing apparatus, the water of the water film can be effectively reduced; a mixed acid liquid can be subjected to chemical reaction with the edge of the battery pieces more easily to reach the water film, so that conditions of overetching and etched black edge can be reduced; and in addition, conditions of insufficient etching or failure etching caused by the over-thick water film also can be prevented.

Description

[0001] Technical field: [0002] The invention relates to a photovoltaic battery water film wiper device. [0003] Background technique: [0004] 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 the battery from short circuiting. When the battery is etched, 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 over-etched black edges, which affect the power and appearance of the battery. question. 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 etching tank, and prevents the battery from...

AI Technical Summary

Problems solved by technology

[0005] However, since the surface of the cell is covered with a layer of water film during etching, when the mixed acid corrodes the edge of the cell, the amount of water in the water film is large, resulting in the mixed acid not being able to completely contact the edge of the cell, or the acid content at the junction of the mixed acid and the water film is reduced. Diluted with water, there will be shallow or no corrosion on the edge of the cell. When the cell is tested, the positive and negative electrodes at the edge will be connected, resulting in battery failure and edge leakage.

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