Photovoltaic welding strip and preparation method thereof

Abstract

The invention discloses a photovoltaic welding strip and a preparation method thereof. The oxidation resistance and corrosion resistance of the welding strip are improved. In the photovoltaic welding strip, an SiO2 thin film layer is formed on the area, except the positions of welding spots, on the surface of the photovoltaic welding strip. The photovoltaic welding strip comprises a copper base, a plurality of welded metal parts and the SiO2 thin film layer, wherein the welded metal parts are formed at the positions, corresponding to the welding spots, on the surface of the copper respectively; the SiO2 thin film layer is formed on the surface, with which the welded metal parts are not covered, of the copper base; and the surface of the copper base is completely covered with the welded metal parts and the SiO2 thin film layer. The preparation method of the photovoltaic welding strip comprises the following steps: S1, plating welded metal at the positions, corresponding to the welding spots, on the surface of the copper base; and S2, preparing the SiO2 thin film layer on the surface, with which the welded metal is not covered, of the copper base.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a photovoltaic welding ribbon and a preparation method thereof. Background technique [0002] Solar photovoltaic power generation is an efficient and clean power generation method. Its materials and technologies are one of the hotspots of current research. As one of the important raw materials in solar cell packaging, photovoltaic ribbons have a great influence on the performance and cost of solar modules. Manufacturing costs have a significant impact. [0003] At present, the most widely used photovoltaic ribbon in the industry is copper-based tin-coated ribbon. With the development of the industry, the control of material cost is becoming more and more strict. However, one of the important directions of product development is to improve product performance and reduce product cost. Conventional photovoltaic ribbons use copper as the base material, and a layer of tin-lead soldering ...

AI Technical Summary

Problems solved by technology

The corrosion resistance of copper is poor. Under the long-term outdoor working conditions of solar cell modules, the packaging material will release some organic corrosion components, which can directly react with the copper core and affect its conductivity and reliability.

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