Photovoltaic cell assembly and connection process thereof

Abstract

The invention discloses a photovoltaic cell piece assembly and a connection technology thereof, in the photovoltaic cell piece assembly, cell pieces are alternately arranged in parallel according to the polarity of positive and negative poles, a welding strip is placed at the position between every two adjacent cell pieces along the length direction of the cell pieces, and the center of an overlapping area of a cell piece main grid and the welding strip is selectively coated with a conductive adhesive; organic silica gel is coated at the center of the overlapped area of the battery piece and the welding strip or at the position relatively close to the inner side of the battery piece, and the welding strip and the battery piece are bonded and fixed through the organic silica gel or the matching of the organic silica gel and the conductive adhesive, so that the battery pieces are connected in series. The micro-elastic connection of the battery piece and the welding strip is realized by adopting the conductive adhesive and the organic silica gel which are both silica gel bases, so that internal stress can be dispersed to each adhesive position, the hidden crack risk is reduced, the bunching yield of the battery piece is high, the conductive adhesive is arranged according to the conduction requirement, a plurality of conduction positions are formed between the welding strip and the battery piece, the conduction mode is free, and the reliability is high. And zero-spacing and negative-spacing inter-chip connection can be realized, the photoelectric conversion efficiency of the assembly is higher, and the assembly is more beautiful.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic cells, and in particular relates to a photovoltaic cell component and a connection process thereof. Background technique [0002] At present, the series connection of IBC cells in the photovoltaic industry is achieved by laser welding to realize the hard connection between the ribbon and the pad point of the cell, or by coating the main grid on both sides of the IBC cell with conductive adhesive to achieve bonding with the ribbon. [0003] In the hard connection method (such as laser welding, electromagnetic induction welding, etc.), cracks are prone to occur at the connection between the battery sheet and the ribbon, and the internal stress is large, and the battery sheet is easy to warp along the ribbon direction. Usually, it is necessary to use a special-shaped welding strip to release the stress, and the process is complicated and the cost is high. [0004] Soft connection methods (such ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of the IBC cell welding process existing in the prior art, such as difficulty, high cost, and potential risks such as hidden cracks or desoldering, the purpose of the present invention is to provide a photovoltaic cell assembly and its connection process

Images