Solar cell packaging rubber film and preparation method thereof

Abstract

The invention relates to a solar cell packaging rubber film and a preparation method thereof. The solar cell packaging rubber film comprises the following components in parts by mass: 100 parts of polymer resin, 1-50 parts of polar resin, 0.5-2 parts of cross-linking curing agent, 0.05-0.2 part of cross-linking curing accelerator, 0.2-0.6 part of tackifier, 0.1-0.5 part of antioxidant, 0.05-0.25 part of ultraviolet stabilizer and 0.05-0.25 part of ultraviolet absorber. The preparation method of the solar cell packaging rubber film comprises the following steps of: 1) evenly mixing the raw materials according to proportions to obtain mixture; and 2) pouring the mixture into an extruder for mixing and plasticizing to obtain extruded materials, casting and calendaring the extruded materials to form a film, shaping through cooling and drawing, and finally winding the film. The solar cell packaging rubber film provided by the invention has the advantages that the light transmittance is higher, the film can effectively resist aging and the electric insulating performance is not changed fundamentally after the film is used for a long time; and the preparation method provided by the invention has the advantages that the processing efficiency is high, the cost is low and the large-scale production can be realized.

Description

technical field [0001] The invention belongs to the field of solar cell packaging materials and preparation thereof, in particular to a solar cell packaging adhesive film and a preparation method thereof. Background technique [0002] When non-renewable energy sources such as electricity, coal, and oil are running out frequently, and energy issues have increasingly become a bottleneck restricting the development of the international society and economy, more and more countries have begun to implement the "Sunshine Plan" to develop solar energy resources and seek new impetus for economic development. Some high-level nuclear research institutions in Europe have also begun to turn to renewable energy. Driven by the huge potential of the international photovoltaic market, the solar cell manufacturing industries of various countries are scrambling to invest huge sums of money and expand production in order to compete for a place. [0003] Solar photovoltaic power generation will...

AI Technical Summary

Problems solved by technology

Before the 1980s, liquid silicone resin and polyvinyl butyral resin sheet (PVB) were tried at home and abroad, but they were all eliminated due to high price, harsh construction conditions, and poor physical properties.

The most widely used packaging material in the market is ethylene-vinyl acetate polymer (EVA). However, EVA material is easy to degrade under the action of light and heat to produce acidic substances, which will corrode the metal electrodes in the battery sheet, and may cause short circuits or Open circuit, so that the solar cell module is damaged

More importantly, the EVA material will produce C=C double bonds due to degradation, which will make the film yellow. Some data show that the yellow film will greatly reduce the photoelectric conversion efficiency of solar cells.

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