Photovoltaic module and manufacturing method thereof

Abstract

The invention provides a photovoltaic module, which comprises a plurality of photovoltaic cell strings, wherein each photovoltaic cell string comprises a plurality of photovoltaic cells arranged in afirst direction, and each photovoltaic cell comprises a first photovoltaic cell, a second photovoltaic cell, a solder strip and a flexible conductive material, and the solder strip and the flexible conductive material are used for electrical connection. According to the invention, the adjacent photovoltaic cells are connected in an overlapping manner, and the solder strip and the flexible conductive material are applied at the same time, so that the arrangement among the photovoltaic cells is enabled to be tighter on the one hand, the waste area without power generation on the photovoltaic module is reduced, and thus the efficiency of the photovoltaic module is improved; and on the other hand, the application of the solder strip improves the capability and reliability of collecting and conducting the current on the surface of the photovoltaic cell, improves the power of the photovoltaic module, and reduces the consumption and cost of electrode materials on the front and back surfaces of the photovoltaic cell. Moreover, the overlapping regions are flexibly interconnected, so that the overlapping stress is reduced, the photovoltaic module is enabled to adapt to the use of thin silicon wafers, and the cost can be further reduced.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a photovoltaic module and a manufacturing method thereof. Background technique [0002] Such as Figure 12 As shown, the photovoltaic cell string of the traditional photovoltaic module realizes the electrical connection of the adjacent photovoltaic cells through the welding ribbon, and the above-mentioned welding strip connects the front electrode of one photovoltaic cell and the back electrode of the other adjacent photovoltaic cell. There is a gap of 1-3mm between the sheets. This gap provides a passage for the ribbon to pass through the adjacent cells, and also provides space for the release of high and low temperature stress during the outdoor use of the module. However, this part of the gap does not generate electricity and is a "wasted" area on the surface of the module. In order to maximize the use of the light-receiving area of ​​photovoltaic modules and ...

AI Technical Summary

Problems solved by technology

In addition, in the general "stitch welding" technology, the width of the welding strip at the overlapping part is wider than that at the non-overlapping part on the front, forming "convex" points one by one, and the appearance is not beautiful enough.

Images