Light reflection film applied to spaces between photovoltaic assembly strings/photovoltaic assembly sheets

Abstract

The embodiments of the present invention relate to a light reflection film applied to spaces between photovoltaic assembly strings / photovoltaic assembly sheets. The light reflection film includes a release film, an EVA pressure-sensitive adhesive, a PET base material, a microprism layer, a light reflection layer and an insulating layer; the EVA pressure-sensitive adhesive is disposed on the release film; the PET base material is arranged on the EVA pressure-sensitive adhesive; the microprism layer is composed of a plurality of microprism arrays and is disposed on the PET base material; the light reflection layer is disposed on the outer surface of each microprism; and the insulating layer is disposed on the outer surface of the light reflection layer. According to the light reflection film applied to the spaces between the photovoltaic assembly strings / photovoltaic assembly sheets, the insulating layer further increase the light reflection efficiency of the light reflection layer, thereby further improving the utilization ratio of light energy and increasing the output power of photovoltaic assemblies, and therefore, insulation and efficiency increasing effects can be achieved; and the pressure-sensitive adhesive is provided to solve the problem that heating is required when the functional film is attached in the spaces between battery strings / battery sheets, the pressure-sensitive adhesive can also improve efficiency in the application process of the release film.

Description

technical field [0001] The invention relates to a light-reflecting film, in particular to a light-reflecting film used on the string spacing / sheet spacing of photovoltaic modules. Background technique [0002] Photovoltaic ribbons are used in the connection between photovoltaic module cells, and play an important role in conducting electricity and collecting electricity. In order to ensure reliable welding between the ribbon and the battery and prevent corrosion of the ribbon, the surface of the ribbon is coated with a tin layer. When the sunlight hits the surface of the ribbon, the tin layer will directly reflect the sunlight, and this part of the sunlight cannot Utilized by the battery board, resulting in a waste of light energy. [0003] Some solder strips have stripes on the body to reflect light, but the base material of the solder strips is copper, and the stripe structure is difficult to achieve a microstructure during processing. The reflective surface is not ideal....

AI Technical Summary

Problems solved by technology

In order to ensure reliable welding between the ribbon and the battery and prevent corrosion of the ribbon, the surface of the ribbon is coated with a tin layer. When the sunlight hits the surface of the ribbon, the tin layer will directly reflect the sunlight, and this part of the sunlight cannot Utilized by battery panels, resulting in a waste of light energy

[0003] Some solder strips have stripes on the body to reflect light, but the base material of the solder strips is copper, and the stripe structure is difficult to achieve a microstructure during processing. The reflective surface is not ideal. After tin coating, the thickness of the tin layer is likely to be uneven Uniform, easy to cause fragments of the cell, the price of tin raw materials is high, too thick will cause serious waste

[0004] In the patent literature with the publication number CN103413861A, a reflective film for photovoltaic modules is disclosed. The surface layer is provided with a prism-shaped microstructure layer, which is simple in structure and low in cost, and can improve the light energy utilization rate of photovoltaic modules. The ridgeline of the prism structure is along the length of the ribbon, and the reflected light will only be reflected to a local area of ​​the cell, which does not make full use of the entire cell

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