Tubular PERC two-sided solar cell, preparing method thereof and electroplating equipment special for tubular PERC two-sided solar cell

Abstract

The invention discloses a tubular PERC two-sided solar cell. The tubular PERC two-sided solar cell comprises back silver main girds, back aluminum gate lines, reverse composite film, P-type silica, N-type emitting electrodes, front passive film and positive electrodes, wherein the positive electrodes are prepared through electroplating equipment, the front of the cell faces downwards and is in contact with electroplating liquid of an electroplating tank, and LED lamps irradiate the back of the tubular PERC two-sided solar cell. The electroplating tank is internally provided with an anode plateand an electric brush, a positive electrode of a power supply is connected with the anode plate, a negative electrode of the power supply is connected with the electric brush, and the electric brushis connected with the back silver main gird at the back of the tubular PERC two-sided solar cell. Accordingly, the invention further discloses a preparing method of the tubular PERC two-sided solar cell and the electroplating equipment special for the tubular PERC two-sided solar cell. By means of the tubular PERC two-sided solar cell, the preparing method thereof and the electroplating equipmentspecial for the tubular PERC two-sided solar cell, the conducting uniformity of the electrodes at the back of the cell is improved, the uniformity of the electroplating electrodes at the front of thecell is improved, and the good appearance of the cell is maintained.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a tubular PERC double-sided solar cell, a method for preparing a positive electrode of the tubular PERC double-sided solar cell, a method for preparing a tubular PERC double-sided solar cell, and special electroplating equipment. Background technique [0002] Crystalline silicon solar cell is a device that effectively absorbs solar radiation energy and converts light energy into electrical energy by using the photovoltaic effect. When sunlight shines on the semiconductor P-N junction, new hole-electron pairs are formed. Under the action, holes flow from the N region to the P region, electrons flow from the P region to the N region, and a current is formed after the circuit is turned on. [0003] Traditional crystalline silicon solar cells basically only use front passivation technology, depositing a layer of silicon nitride on the front of the silicon wafer by PECVD to reduce the recom...

AI Technical Summary

Problems solved by technology

[0006] The industry generally adopts screen printing silver paste technology to manufacture the positive electrode of double-sided solar cells. The consumption of silver paste is large, the cost is high, the line width of the silver electrode is relatively large, the shading area is large, and the conductive uniformity of the electrode is poor. Photoelectric conversion efficiency of the battery

In addition, the tubular PECVD technology has always been relatively low in appearance yield and EL yield due to the mutual constraints of winding plating and scratching.

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