Solar cell module and back sheet therefor

A technology for solar cells and backplanes, which is applied in circuits, electrical components, electronic equipment, etc., can solve the problems that it is difficult to supply metals, and the adhesion between PVdF coating films and metal substrates has not been improved, so as to achieve thinning and reduce Thickness, strong adhesion effect

Inactive Publication Date: 2012-04-11
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uneven presence of tetraalkoxysilane or its partial hydrolyzate at the interface of PVdF and EVA, the adhesion of PVdF coating film to metal substrate is still not improved.
Moreover, since PVdF is crystalline and has no functional groups, it must be heated and fired at 200°C to 300°C for 20 seconds to 120 seconds in order to form a coating film, so it is difficult to apply to water-impermeable sheets other than metals.

Method used

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  • Solar cell module and back sheet therefor
  • Solar cell module and back sheet therefor
  • Solar cell module and back sheet therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0101] Under stirring, 223.2 parts by mass of TFE-based copolymers containing hydroxyl groups (Zeffle GK570 manufactured by Daikin Industries, Ltd., solid content 65 mass %, hydroxyl value 60 mgKOH / g, solvent: butyl acetate), 250 parts by mass of black pigment ( DAIPYROXIDE 9510 manufactured by Dainichi Seika Co., Ltd.) and 126.8 parts by mass of butyl acetate were pre-mixed, then 780 parts by mass of glass beads with a diameter of 1.2 mm were added, and dispersed at 1500 rpm for 1 hour using a pigment disperser. Thereafter, glass beads were filtered through a #80 mesh sieve, and 269.2 parts by mass of a hydroxyl group-containing TFE-based copolymer (Zeffle GK570) and 80.7 parts by mass of butyl acetate were added to this solution to prepare a black paint.

[0102] In 100 parts by mass of the black paint, 13 parts by mass of an isocyanate prepolymer curing agent (Desmodur N3800 manufactured by Sumika Bayer Urethane Co., Ltd.) and 100 parts by mass of butyl acetate as a diluting...

preparation example 2

[0104] Under stirring, premix 223.2 parts by mass of TFE-based copolymer containing hydroxyl groups (Zeffle GK570), 250 parts by mass of black pigment (DAIPYROXIDE 9510), and 126.8 parts by mass of butyl acetate, and then add 780 parts by mass of glass beads with a diameter of 1.2mm , using a pigment disperser to disperse for 1 hour at 1500 rpm. Thereafter, glass beads were filtered through a #80 mesh sieve, and 269.2 parts by mass of a hydroxyl group-containing TFE-based copolymer (Zeffle GK570) and 80.7 parts by mass of butyl acetate were added to this solution to prepare a black paint.

[0105] In 100 parts by mass of the black paint, 13 parts by mass of isocyanate prepolymer curing agent (Desmodur N3800), 3 parts by mass of silane coupling agent (OCN-C 3 h 6 -Si(OCH 3 ) 3 ), 100 parts by mass of butyl acetate as a diluting solvent, thereby preparing a curable coating 2.

preparation example 3

[0107] Under stirring, 223.2 parts by mass of a hydroxyl-containing TFE-based copolymer (Zeffle GK570), 250 parts by mass of titanium oxide (manufactured by Sakai Chemical Co., Ltd. D918) as a white pigment, and 126.8 parts by mass of butyl acetate were premixed, and then added 780 parts by mass of glass beads having a diameter of 1.2 mm were dispersed using a pigment disperser at 1500 rpm for 1 hour. Thereafter, glass beads were filtered through a #80 mesh sieve, and 269.2 parts by mass of a hydroxyl group-containing TFE-based copolymer (Zeffle GK570) and 80.7 parts by mass of butyl acetate were added to this solution to prepare a white paint.

[0108] To 100 parts by mass of this white paint, 12 parts by mass of an isocyanate-based prepolymer curing agent (TSE100 manufactured by Asahi Kasei Chemical Co., Ltd.) and 100 parts by mass of butyl acetate as a diluting solvent were mixed to prepare a curable paint 3.

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Abstract

Provided is a solar cell back sheet having improved adhesiveness to a water-impermeable sheet and to a copolymer of ethylene and vinyl acetate. Also provided is a solar cell module. The back sheet for the solar cell module comprises a cured film layer formed on at least one side of a water-impermeable sheet. Said cured film layer is a fluorine-containing polymer coating that contains a hydroxyl group and also contains, as a curing agent, an isocyanate prepolymer and / or a melamine resin.

Description

technical field [0001] The present invention relates to a back sheet of a solar cell and a solar cell module provided with the back sheet, the adhesiveness of the back sheet of the solar cell to a water-impermeable sheet contained in the back sheet of the solar cell, and a solar cell module The sealant ethylene / vinyl acetate copolymer has excellent adhesion. Background technique [0002] Such as Figure 6 As shown, a solar cell module generally has a structure in which solar cells 1 are sealed with a sealant layer 2 and laminated by sandwiching a surface layer 3 made of glass or transparent resin and a back sheet 4 . In addition, ethylene / vinyl acetate copolymer (EVA) can be used as a sealant. [0003] The back sheet 4 in the solar cell module not only has the purpose of improving the mechanical strength of the module, but also prevents moisture (water vapor) from entering the sealant layer 2 . [0004] Such as Figure 7 As shown, the back sheet 4 is formed by bonding a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCC09D175/04B32B2307/71C08F2220/1825B32B27/36H01L31/048B32B2307/402B32B2250/02B32B2457/12C09D127/18B32B2264/108B32B2255/20Y02E10/50C08G18/6279H01L31/02167B32B2255/26B32B2264/102C08J7/04C08K5/29B32B2307/7246B32B27/08B32B2307/712B32B2255/10B32B2264/104B32B2250/24B32B2255/28H01L31/049Y10T428/3154C08F220/1804C08L61/28C08L75/00
Inventor 长门大井本克彦中川秀人青木和子午坊健司
Owner DAIKIN IND LTD
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