Back contact solar cell module and manufacturing method thereof

Abstract

The application discloses a back contact solar cell module and a manufacturing method thereof. The back contact solar cell module comprises a cell piece layer; the back side of the cell piece layer isfixedly connected with an insulating layer; a number of conductive metal foil circuits are fixedly connected to one side of the insulating layer facing away from the cell piece layer; a gap is provided between adjacent conductive metal foil circuits; the cell piece layer is provided with a number of back contact solar cell pieces; the positive and negative electrodes of any back contact solar cell piece are electrically connected to the unconnected conductive metal foil circuits separately through electrical connection bodies; one side of the conductive metal foil circuits facing away from the cell piece layer is bonded with a polymer back plate through an adhesive layer. The positive and negative electrodes of the back contact solar cell piece are leaded out through the electrical connection bodies; the conductive metal foil circuits realize series or parallel connection among each back contact solar cell piece; and the encapsulation is carried out through lamination; therefore, thepossibility of cell piece bended arcualia is reduced, the fragmentation rate is reduced, and the problems that the cell piece bended arcualia and high fragmentation rate can be caused by connecting the cell pieces with welding strips in the prior art can be solved.

Description

technical field [0001] The present invention generally relates to the field of photovoltaics, specifically to the field of solar cells, and in particular to a back-contact solar cell assembly and a manufacturing method thereof. Background technique [0002] Back-contact solar cells (such as IBC, MWT, and EWT solar cells) have received widespread attention. Because there is no busbar on the front, or even any electrode patterns, the positive and negative electrodes are located on the back of the cell, reducing the shading of the cell. , improving the conversion efficiency of the cell. Making silicon wafers into back-contact cells can further improve the conversion efficiency and output power of cells. [0003] Conventional batteries use traditional ribbon welding to connect the battery sheets, and the stresses caused by double-sided symmetrical welding can offset each other. However, since the positive and negative electrodes of the back-contact solar cell are on the back s...

AI Technical Summary

Problems solved by technology

However, since the positive and negative electrodes of the back-contact solar cell are on the back side, the traditional ribbon welding method cannot be used to connect the cells when making the back-contact cell module. The stress generated after cooling by single-sided welding will cause the cells to bend. Fragments, the fragmentation rate is very high, the stress of the ribbon not only does not decrease, but increases significantly

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