A remedial method for severe el broken grid of finished crystalline silicon solar cells

Abstract

The invention discloses a remedy method for serious EL grid breakage of finished crystalline silicon solar cells. The method is characterized by comprising the following steps: putting a cell suffering from serious grid breakage at a positive electrode printing feeding position of a screen printing machine; adjusting the printing offset (X, Y, T) to make a positive electrode printed at the first time and a positive electrode printed at the second time overlap completely; and making the positive electrodes printed at the first time and at the second time normally flow into a sintering furnace for sintering, and carrying out sorting test or EL test to detect grid breakage. The remedy method of the invention has the beneficial effect that by adopting the technical scheme, inefficient cells and cells with bad appearance caused by serious EL grid breakage are made into cells with normal appearance and normal efficiency, the knotty problem that cell manufacturers backlog a large number of inefficient cells and cells with bad appearance is solved, the quality rate is improved, and the economic efficiency of enterprises is increased.

Description

Technical field [0001] The invention relates to the field of making crystalline silicon solar cells, in particular to a method for remedying serious EL grid breakage of finished crystalline silicon solar cells. Background technique [0002] Under the current situation of the photovoltaic industry, obtaining higher photoelectric conversion efficiency, higher quality rate, and lower cost determines whether each company can survive the new round of industry reshuffle, and the grid lines of high-efficiency solar cells are getting more and more. Thinner, lower and lower costs, EL grid breaks will follow, the current reduction of the cell with severe grid breakage will affect the electrical performance of the entire assembly, and the power will be reduced. In the grid-connected power station, the hot spot effect is likely to occur in the components, and local heating is too high, which affects the life of the components and causes serious burnout of the components. At present, the cel...

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Problems solved by technology

[0002] Under the current situation of the photovoltaic industry, obtaining higher photoelectric conversion efficiency, higher quality rate, and lower cost determines whether each company can survive in a new round of industry reshuffle. Thinner, the cost is getting lower and lower, and the EL grid is broken. The current reduction of the battery with a severe grid break will affect the electrical performance of the entire component, and the power will be reduced.

In the grid-connected power station, due to the hot spot effect in the components, the local heating is too high, which affects the life of the components and seriously burns out the components.

At present, the batteries with severe EL grid breakage of major manufacturers are generally disposed of at a low price, resulting in a great waste of resources

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