VPF backplane for solar cell and processing process thereof

A solar cell and processing technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of easy aging of adhesives, accelerated PET decomposition, plasticization, etc., to improve overall performance, prolong service life, and overcome delamination. effect of the problem

Inactive Publication Date: 2014-03-26
JOLYWOOD SUZHOU SUNWATT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure PET backsheet, because the main chain of PET molecules contains a large number of ester groups, has a good affinity with water, which is easy to cause plasticization. At the same time, even a small amount of water will lead to degradation of the main chain of the molecule. The rise will accelerate the decomposition of PET, and eventually the mechanical properties of PET will be lost, which cannot guarantee the 25-year service life of solar cell modules
Adhesives are used to glue and compound multi-layer PET backsheets. Because the adhesives are prone to aging under high temperature conditions, the backsheets will be delaminated and delaminated, and finally lose their protective effect on solar modules.

Method used

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  • VPF backplane for solar cell and processing process thereof
  • VPF backplane for solar cell and processing process thereof
  • VPF backplane for solar cell and processing process thereof

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Embodiment Construction

[0020] see figure 1 , an embodiment of a VPF back sheet for solar cells provided by the present invention, comprising a functional PET layer 1 and a conventional PET layer 2, the functional PET layer 1 and the conventional PET layer 2 are passed through a casting process Composite together. The conventional PET layer 2 in the present invention refers to a pure PET structure, which is the same as the existing mature products. The functional PET layer refers to a PET structure formed after blending and modification of conventional PET with anti-UV aging, heat and humidity resistance, and hydrolysis resistance. The functional PET layer contains an anti-ultraviolet aging agent and is resistant to ultraviolet and heat and humidity Aging performance. These modifiers can be completed by using mature products in the prior art. This functional PET layer is also a mature product, and the corresponding functional PET layer can be selected according to different performance requirements...

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Abstract

The invention provides a VPF backplane for a solar cell. The VPF backplane comprises a functional PET layer and a conventional PET layer and is characterized in that the functional PET layer and the conventional PET layer are compounded by using tape casting technology. According to the invention, the tape casting technology is adopted to compound the functional PET layer and the conventional PET layer, so layering of PET layers during glueing is overcome, and service life is prolonged; meanwhile, due to usage of a composite structure of the functional PET layer and the conventional PET layer, integral performance of the VPF backplane is improved; the surface of a fluorine-containing coating in contact with EVA has good ultraviolet aging resistance; the outer air surface of functional PET has double properties consisting of ultraviolet resistance and damp-heat aging resistance; and the backplane has stronger environmental aging resistance.

Description

technical field [0001] The invention relates to a solar cell assembly, in particular to a solar cell back plate assembly. Background technique [0002] The pure PET back sheet in the prior art generally has a PET single-layer structure or a multi-layer structure. When a multi-layer structure is used, the multi-layer structures are bonded together by an adhesive. Pure PET backsheet, because the main chain of PET molecules contains a large number of ester groups, has a good affinity with water, which is easy to cause plasticization. At the same time, even a small amount of water will lead to degradation of the main chain of the molecule. The rise will accelerate the decomposition of PET, and eventually the mechanical properties of PET will be lost, and the 25-year service life of solar cell modules cannot be guaranteed. The multi-layer PET back sheet bonded by adhesive is easy to age under high temperature conditions, resulting in delamination and delamination of the back she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/00H01L31/049B32B27/36
CPCY02E10/50
Inventor 林建伟
Owner JOLYWOOD SUZHOU SUNWATT
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