Conductive adhesive, solar cell string and preparation method of solar cell string

Abstract

The invention provides a conductive adhesive, a solar cell string and a preparation method of the conductive adhesive. The method comprises the following steps: paving the conductive adhesive on welding spots of a welding strip, and then paving an insulating material between the welding spots; and putting battery pieces, heating the conductive adhesive, and simultaneously pressing the battery pieces and the welding strip, so as to obtain the solar cell string. The conductive adhesive comprises 29-80 parts of a resin base material and 19-71 parts of a conductive filler. Compared with the prior art, by the low-temperature cured conductive adhesive, effective adhesion of the contact point part of the welding strip and the battery is realized; meanwhile, the conductive adhesive has good electrical conductivity; electrical connection of batteries between back-contact batteries is realized; the conductive adhesive is relatively low in curing temperature; and the generated thermal stress is relatively small, so that the bending, cracking and crushing ratios of the solar cell pieces are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a conductive adhesive, a solar cell string and a preparation method thereof. Background technique [0002] As the earth's non-renewable resources of oil and gas based on carbon and hydrogen elements are increasingly depleted, solar cells can use their photovoltaic effect to convert solar light into electrical energy, which is environmentally friendly and inexhaustible. An important development direction to replace conventional oil and gas energy. Solar cells can generally be divided into crystalline silicon solar cells, thin film solar cells, dye-sensitized solar cells and organic solar cells. After years of technological progress and relatively mature market promotion, crystalline silicon solar cells are gradually occupying a dominant position in the field of solar energy. [0003] In order to improve the photoelectric conversion efficiency of crystalline silic...

AI Technical Summary

Problems solved by technology

This method uses welding to connect, although it can ensure the electrical connection of the positive and negative electrodes on the back of the MWT battery, but because the general welding temperature is above 300°C, and because welding is performed on one side of the battery, it will cause huge thermal stress on the front and back of the battery. , leading to severe bending of the battery sheet, and even cracking and chipping of the battery sheet, thereby reducing the yield rate and increasing the cost

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