Photovoltaic cell series packaging method

Abstract

The invention discloses a series packaging method for photovoltaic cells, and the method specifically comprises the following steps: 1, manufacturing a sub-cell packaging layer and a sub-cell conductive pattern, and forming a patterned sub-cell packaging layer; 2, connecting the graphical sub-battery packaging layer with the sub-battery; 3, manufacturing a series conductive pattern and a series packaging layer to form a graphical series packaging layer; 4, connecting the sub-battery connected with the graphical sub-battery packaging layer to a graphical series packaging layer, and connecting the graphical sub-battery packaging layer and the graphical series packaging layer through a series area. The beneficial effects of the invention are that the method changes a conventional electrode lead-out material, reduces the use of silver paste, and greatly reduces the cost of a photovoltaic module; the bus bars connected in series are changed into the conductive patterns and are compounded with the packaging material into a whole, so that the bus bars can be connected in series synchronously in the packaging process, and the process cost is reduced.

Description

technical field [0001] The invention relates to a photovoltaic cell, and specifically, a series packaging method for a photovoltaic cell is designed. Background technique [0002] At present, the main connection methods of photovoltaic cells on the market are as follows: ① use silver paste silk screen printing method to make grid lines on the surface, and then weld bus bars to lead out the positive and negative electrodes and connect them in series; ② use silk screen method to lead out the positive and negative electrodes and then Lap each sub-battery together (CN103840024), ③ use thin metal wires to wind it into a fixed shape and then lap it on the front and back of the battery, ④ use the front plate and back plate to lead out the positive and negative electrodes and connect them in series (CN110556443A). Method ① is currently the main method for leading out and connecting the electrodes of photovoltaic modules in series, but in this method, silver paste and silk screen pri...

AI Technical Summary

Problems solved by technology

Method ① is currently the main method for leading out and connecting the electrodes of photovoltaic modules in series, but in this method, silver paste and silk screen printing technology are used, the cost is high and the process is complicated, and the existence of bus bars also forces the presence of Not a small gap, reducing the effective power generation area

Method ② Due to the certain thickness of the battery sheet, it is easy to damage the film layer during lapping and cause short circuit of the battery, and the high price of silver paste is not conducive to cost reduction; During the process, the contact area is limited, and it is easy to cause poor contact to cause component failure; method ④ Although the use of the front plate and the back plate improves the contact between the lead-out grid lines and the battery chip, this method will inevitably lead to the existence of The gap, and the series area also occupies a large area, which reduces the effective power generation area

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