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Back membrane material of solar cell module

A technology for solar cells and back films, applied in electrical components, circuits, photovoltaic power generation, etc., can solve problems such as the decline of weather resistance, and achieve the effects of good moisture resistance and gas resistance, excellent weather resistance, and high mechanical strength.

Active Publication Date: 2013-07-17
SUZHOU FIRST PV MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material can save a lot of cost, but its weather resistance performance is reduced to a certain extent

Method used

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  • Back membrane material of solar cell module
  • Back membrane material of solar cell module
  • Back membrane material of solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First, in terms of mass fraction, 5 parts of alkali-free glass fiber powder (Guangzhou Hetaisi Chemical Materials Co., Ltd.) and 1 part of polyethylene terephthalate (PET, Japan Polyplastics BN9015) pellets were added 1 part polyethylene glycol (PEG6000, Tianjin Tiantai Fine Chemicals Co., Ltd.), and mix evenly to form a PET mixture; the PET mixture and polylaurolactam (PA12, DuPont 159L, USA) are double-layered according to the ratio of 70:30 Co-extruded to obtain a 250-micron intermediate layer; then, dry-composite 25-micron-thick polyvinyl fluoride (PVF, DuPont, USA) on the PET surface Membrane, 400 μm thick ethylene-vinyl acetate copolymer (EVA, F806, Hangzhou First Photovoltaic Materials Co., Ltd.) was melt-coated on the surface of PA12.

[0029] Among them, the EVA film is melted and extruded by adding crosslinking agent, ultraviolet absorber, light stabilizer and light-shielding filler to EVA resin. Specifically, in 100 parts of EVA resin (EVA250 from DuPont Com...

Embodiment 2

[0031] First, in terms of mass fraction, 10 parts of polybutylene terephthalate (PBT, Japan Toray Company 1494X02) pellets, 10 parts of alkali-free glass fiber powder (Hangzhou Gaoke Composite Materials Co., Ltd.) and 2 parts of polyethylene Diol (PEG8000, Jiangsu Haian Petrochemical Plant), and mixed evenly to form a PBT mixture; the PBT mixture and polysebacyl diamide (PA1010, DuPont 09-12, USA) were double-layered in a ratio of 65:35. Extruded to obtain a 280-micron intermediate layer; then, dry compound a 40-micron-thick polyvinylidene fluoride (PVDF, Arkema, France) film on the surface of PBT, and melt-coat a 350-micron-thick ethylene-vinyl acetate copolymer film on the surface of PA1010. Thin film (EVA, F806 of Hangzhou Foster Photovoltaic Materials Co., Ltd.).

[0032] Among them, the EVA film is melt-extruded by adding cross-linking agent, ultraviolet absorber, light stabilizer and light-shielding filler to EVA resin. Specifically, 100 parts of EVA (TPC Company of Sing...

Embodiment 3

[0034] First, in terms of mass fraction, 5 parts of alkali-free glass fiber powder (Guangzhou Bohao Composite Materials Co., Ltd.) and 1 part of polyethylene terephthalate (PET, Beijing Yanshan Petrochemical) pellets were added Diol (PEG6000, Tianjin Tiantai Fine Chemicals Co., Ltd.), and mix evenly to form a PET mixture; the PET mixture and polydodecyl dodecylamide (PA1212, Arkema, France) are double-layered according to the ratio of 70:30 Co-extruded to obtain a 265-micron intermediate layer; then, dry compound a 40-micron-thick polyvinylidene fluoride (PVDF, Arkema, France) film on the PET surface, and melt-coat a 400-micron-thick ethylene-vinyl acetate on the PA1212 surface Copolymer (EVA) film. The composition of the EVA film is the same as in Example 1.

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Abstract

The invention provides a back membrane material of a solar cell module. The back membrane material is composed of an outer surface weather-proof layer, an intermediate layer and an inner surface encapsulation layer, wherein the outer surface weather-proof layer is a fluorine-containing film or a fluorine-containing coating, the intermediate layer is obtained through co-extrusion of a glass fiber modified polyester layer and a polyamide layer, and the inner surface encapsulation layer is an encapsulation rubber layer which is prepared with vinyl acetate-ethylene copolymers and the like serving as matrix resin. The back membrane material has the advantages that the intermediate layer of the high-performance back membrane is improved, the back membrane is used for encapsulating protection of a back side of the solar cell module, and compared with ordinary integrated back membrane films (ethylene vinyl acetate (EVA) + polyethylene terephthalate (PET) + fluorine films), the back membrane material is high in mechanical strength, good in moisture and gas resistance and good in weather-proof performance.

Description

(1) Technical field [0001] The invention relates to a high-performance solar battery module back film material. (2) Background technology [0002] As a device that converts light energy into electrical energy, solar cell modules are getting more and more attention. At present, the most widely used crystalline silicon cell module has a structure of transparent front substrate glass, EVA film, cell array, EVA film, The rear substrate and backplane are stacked in the order of top to bottom, and then sent to the laminator for high-temperature lamination. [0003] Since solar cell modules are usually installed on outdoor brackets or on top of buildings, and can maintain long-term service life under various natural conditions, the backsheet used as the rear substrate protection and support material requires good mechanical properties, good weather resistance, and barrier properties. Strong resistance, can maintain a certain mechanical strength and water vapor barrier performance ...

Claims

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Application Information

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IPC IPC(8): H01L31/048B32B27/34B32B27/36B32B27/20H01L31/049
CPCY02E10/50
Inventor 侯宏兵杨楚峰周光大林国铖
Owner SUZHOU FIRST PV MATERIAL CO LTD
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