Solar cell, preparation method thereof and photovoltaic module

Abstract

The invention provides a solar cell, which is provided with a plurality of main grids on the surface, and is characterized in that the edge of the solar cell is provided with a plurality of through grooves corresponding to the main grids. According to the invention, the through grooves are formed in the edge of the solar cell, so that the hidden crack phenomenon of the solar cell in the welding and laminating process can be reduced, and when the solar cells are connected in series into a cell string through interconnection strips, the through grooves are used for accommodating at least part ofthe interconnection strips for connecting the adjacent solar cells in series, so that the adjacent solar cells can be connected in series by reserving a very small space between the adjacent solar cells or without setting the space between the adjacent solar cells.

Description

technical field [0001] The invention relates to the field of photovoltaics, in particular to a solar cell, a preparation method thereof, and a photovoltaic module with the solar cell. Background technique [0002] Conventional photovoltaic modules, which use a laminator to laminate the backplane, the first packaging film, several solar cells connected to each other, the second packaging film and the transparent cover, and then install the aluminum frame and junction box , and finally sealed with silicone to form a photovoltaic module. [0003] Wherein, the adjacent solar cells are connected by interconnecting bars, and the interconnecting bars connect the front of one solar cell to the back of the adjacent solar cells, so that the positive and negative electrodes of the solar cells are connected in series. Solar cells are prone to cracks during the welding and lamination process. At present, in order to reduce the phenomenon of cracks, there is a gap of 2mm~4mm between two ...

AI Technical Summary

Problems solved by technology

Solar cells are prone to cracks during the welding and lamination process. At present, in order to reduce the phenomenon of cracks, there is a gap of 2mm~4mm between two adjacent solar cells. The positive and negative electrodes of the sheet are connected up and down; however, the multiple sheet spacing in the photovoltaic module causes a large increase in the module area, which not only increases the material cost, but also greatly reduces the photoelectric conversion efficiency of the module, which is not conducive to the reduction of the cost per watt of the module

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