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Back sheet for solar cell module and solar cell module including same

A solar cell and backplane technology, applied in applications, circuits, electronic equipment, etc., can solve problems such as poor moisture resistance, expensive, insufficient adhesion, etc., and achieve low-cost effects

Active Publication Date: 2014-02-05
YOULCHON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fluorine-based film 1b such as PVDF film or PVF film is expensive, it is not easy to reduce the cost of the back sheet 1
[0010] Furthermore, the existing back sheet 1 has a problem in that durability and barrier properties such as moisture resistance are not satisfactory due to weak interlayer adhesion between layers of the back sheet 1 and insufficient adhesion for adjustment. people are satisfied
However, the adhesion between the fluorine-based film 1b and the EVA sheet 2b is weak
[0011] In addition, although the existing backsheet 1 has advantages in heat resistance or weather resistance, it has poor barrier properties such as poor moisture resistance due to high moisture permeability

Method used

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  • Back sheet for solar cell module and solar cell module including same
  • Back sheet for solar cell module and solar cell module including same
  • Back sheet for solar cell module and solar cell module including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 10 parts by weight of titanium dioxide (TiO2) with an average particle size of 3 μm 2 ) mixed with 100 parts by weight of polyethylene (PE). The mixture was prepared into a 150 μm thick white PE film (hereinafter, referred to as “W-PE film”) by biaxial stretching.

[0078] Further, a 15 μm thick fluorine coating was formed by coating polytetrafluoroethylene (PTFE) on one surface of a heat-resistant PET film (thickness: 150 μm). On the other surface, the above-prepared W-PE film (PE+TiO 2 ) to prepare a backsheet with W-PE (150 μm) / heat-resistant PET (150 μm) / fluorine coating (15 μm) stacked structure.

Embodiment 2 to Embodiment 4

[0080] 10 parts by weight of titanium dioxide (TiO2) with an average particle size of 3 μm 2 ) mixed with 100 parts by weight of polyethylene (PE). The mixture was prepared into a 150 μm thick white PE film (W-PE film) by biaxial stretching.

[0081] In addition, a silicon dioxide layer of 30 nm, 120 nm, or 200 nm thick was formed by deposition on the lower surface of a heat-resistant PET film (thickness: 150 μm), and polytetrafluoroethylene (PTFE) was coated on the lower surface of the silicon dioxide layer. A 15 µm thick fluorine coating was formed. On the upper surface of the heat-resistant PET, the above-prepared W-PE film (PE+TiO 2 ) to prepare a backsheet with a stacked structure of W-PE (150 μm) / heat-resistant PET (150 μm) / silicon dioxide layer / fluorine coating (15 μm). Embodiments 2 to 4 are the same in the stacked structure, and only differ in the thickness of the silicon dioxide layer: embodiment 2 (silicon dioxide layer thickness: 30nm), embodiment 3 (silicon dio...

Embodiment 5

[0083] A film with a stacked structure of fluorine coating (15 μm) / heat-resistant PET (250 μm) / fluorine coating (15 μm) was prepared by coating polytetrafluoroethylene (PTFE) on both surfaces of a heat-resistant PET film (thickness 250 μm). backplane.

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Abstract

Provided are a back sheet for a solar cell module and a solar cell module including the same, the solar cell module comprises a polyester film layer and a fluorine coating layer which coats at least one surface of the polyester film layer. The back sheet is formed on an upper surface of the polyester film layer, and include s a polyethylene film layer attached to an ethylene vinyl acetate (EVA) sheet of the solar cell module. The back sheet for the solar cell module can be distributed at a low cost, and has excellent adhesive property, moisture barrier property (water vapor -permeability preventing property) and the like.

Description

technical field [0001] The present disclosure relates to a back sheet for a solar cell module and a solar cell module including the same. More specifically, the present disclosure relates to a back sheet for a solar cell module that can be provided at low cost and has excellent adhesiveness, moisture resistance (moisture permeability prevention), and the like, and a solar cell module including the same. Background technique [0002] Recently, solar cells developed as next-generation energy sources are rapidly spreading for domestic and industrial purposes. [0003] A solar cell module includes a plurality of solar cells. The solar cells are fixed by the filler sheet, and a back sheet is attached at least on the lower surface and adjusted for sealing purposes. [0004] figure 1 The configuration of a general solar cell module is schematically shown. [0005] refer to figure 1 , The solar cell module generally has a structure in which strengthened glass 3 on which light i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049B32B27/08C08J7/043C08J7/048H01L31/0216
CPCH01L31/0487Y02E10/50C08J7/042C08J2427/12C08J2483/04C08J2367/02H01L31/049B32B27/08B32B27/306B32B27/36B32B2255/10B32B2255/26B32B2307/518B32B2307/54B32B2307/714B32B2457/00Y10T428/264Y10T428/269Y10T428/265Y10T428/3154Y10T428/31786Y10T428/31797C08J7/048C08J7/043
Inventor 姜汉俊尹成焕钱承焕李银九
Owner YOULCHON CHEM