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EVA (ethylene-vinyl acetate) for enhancing efficiency of solar module

A solar module and high efficiency technology, applied in the field of EVA, can solve the problems of darker color, lower molecular weight, lower strength, etc., to achieve the effect of improving effective light, enhancing reflection, and improving photoelectric conversion efficiency

Active Publication Date: 2012-02-15
CSI SOLAR POWER GROUP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The interior of the solar module is equipped with EVA, cells, ribbons, and backsheets. Since the cells and ribbons are inorganic materials, direct ultraviolet light basically has no aging effect on them, because the backsheets are mostly made of polymer composites. Material composition, susceptible to photodegradation by UV light, resulting in reduced molecular weight, darker color, and lower strength

Method used

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  • EVA (ethylene-vinyl acetate) for enhancing efficiency of solar module
  • EVA (ethylene-vinyl acetate) for enhancing efficiency of solar module
  • EVA (ethylene-vinyl acetate) for enhancing efficiency of solar module

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Embodiment Construction

[0024] The technical solutions in the preferred embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0025] Such as figure 1 , 2 As shown in , 3, the novel EVA disclosed by the present invention for improving the efficiency of solar modules is applied between the glass and the battery sheet in the solar module, that is, the light-receiving side of the battery sheet, and the solar module includes glass 1 from top to bottom. , the upper layer of EVA film 2, the battery sheet 3, the lower layer of EVA film 4 and the back plate 5, in addition, the assembly also includes a junction box 6, a bus bar 8 welded between the battery sheets 3, and a frame 7 covering the periphery of the assembly . The novel EVA disclosed by the present invention is encapsulated on the light-receiving side between the glass and the battery sheet 3 , that is, the upper layer of EVA adhesive film 2 .

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Abstract

The invention discloses an EVA (ethylene-vinyl acetate) for enhancing efficiency of a solar module. The EVA is packaged between glass and cell plate in the solar module, i.e. applied to the upper EVA adhesive film. The EVA is prepared by adding a novel ultraviolet absorber and other components into the main component EVA; the EVA has favorable absorption property for ultraviolet light of which the wavelength range is 345-380nm; and the incident light of the upper EVA adhesive film and the light reflected onto the cell plate are enhanced in the module, thereby enhancing the photoelectric conversion efficiency of the cell plate.

Description

technical field [0001] The invention relates to an EVA for encapsulating solar modules, in particular to an EVA for improving the efficiency of solar modules by changing the EVA's spectral response to cells in the effective band of ultraviolet light. Background technique [0002] At present, the continuous use of conventional energy has brought about a series of economic and social problems such as energy shortage and environmental degradation. Generally speaking, conventional energy refers to energy that is relatively mature in technology and has been used on a large scale, while new energy usually refers Energy that has not yet been used on a large scale and is being actively researched and developed. Therefore, coal, oil, natural gas, and large and medium-sized hydropower are all regarded as conventional energy sources, and solar energy is a non-polluting green energy that is currently used on a large scale. It is the main trend in the development of solar cell component...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L31/04C08K13/02C08K3/22C08K5/132C09J7/00C09J123/08C09J131/04C09J11/04C09J11/06H01L31/048
CPCY02E10/50
Inventor 刘国丽陈道远
Owner CSI SOLAR POWER GROUP CO LTD
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