Interconnector used for solar cell and manufacturing method thereof, and solar cell interconnection method and assembly thereof

Abstract

The invention provides an interconnector used for a solar cell and a manufacturing method thereof, and a solar cell interconnection method and an assembly thereof. In the prior art, an interconnector is in welding connection with a solar cell so that problems of high heating temperature, and bending, subfissure and fragments caused by incapability of interconnection materials in reducing the difference of thermal expansion coefficients of the interconnector and the solar cell exist; and when adhesive connection is adopted, the interconnector and a conductive adhesive layer are of a split structure so that manufacturing efficiency is lower. The interconnector used for the solar cell includes a metal base material, and a conductive adhesive layer and a separation layer, which are sequentially laminated on the metal base material. The manufacturing of the interconnector is as follows: providing a metal substrate; coating the upper and / or lower surface of the metal substrate with the conductive adhesive layer which covers the isolation layer; and finally cutting the metal substrate, the conductive adhesive layer and the isolation layer so as to form the interconnector. Therefore, the difference of the thermal expansion coefficients of the interconnector and the solar cell can be reduced effectively and thus bending, subfissure and fragments of the solar cell caused by the difference are prevented; and moreover, the manufacturing efficiency and the power of the solar cell assembly can be improved.

Description

technical field [0001] The invention relates to the field of solar cell manufacturing, in particular to an interconnection bar for solar cells and a manufacturing method thereof, a solar cell interconnection method and components thereof. Background technique [0002] With the development of crystalline silicon solar cell technology, the conversion efficiency of solar cells is getting higher and higher, but its thickness is getting thinner and thinner, from 300 μm in the past to 180-200 μm at present, and may develop to 160 μm or even thinner in the future; And its size is getting bigger and bigger, from 103mm×103mm at the beginning of this century to the current 125mm×125mm, 156mm×156mm, and may even develop to 200mm×200mm in the future. [0003] When conventional crystalline silicon solar cells are packaged into solar cell modules, interconnection strips for solar cells are usually used to weld and connect solar cells in series. The surface layer of the interconnection str...

AI Technical Summary

Problems solved by technology

[0005] However, the interconnection strip and the conductive adhesive film in the prior art are split structures and are processed by different manufacturers, and the conductive adhesive film and the interconnection strip are bonded together when the components are packaged. This split structure leads to process integration. The degree of modernization is not high, and the conductive adhesive film needs to be pre-attached to the interconnection strip or solar cell grid line in the production process, resulting in complex process and low efficiency

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