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Solar cell backboard and production technique thereof

A solar cell and production process technology, applied in the field of solar cells, can solve the problems of degumming, easy embrittlement of the back sheet, high water vapor transmission rate, etc., and achieve the effects of excellent weather resistance, long service life, and high light transmittance

Inactive Publication Date: 2012-06-27
ZHEJIANG DILONG PHOTOELECTRICITY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The PVDF film and PET film in the existing solar cell back sheet are not easy to bond, so that the back sheet is easily brittle, the water vapor transmission rate is relatively high, and degumming is prone to occur, which in turn affects the service life of the solar cell

Method used

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  • Solar cell backboard and production technique thereof
  • Solar cell backboard and production technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of production technology of solar cell back plate is characterized in that, comprises the steps:

[0031] (1) Corona is used to treat the surface of the PET film to generate low-temperature plasma, and the free radical reaction on the surface of the PET film makes the polymer cross-linked and the surface becomes rough, thereby increasing the adhesion to polar solvents;

[0032] (2) Use the KS06 glue of Coffey Chemical Co., Ltd. to prepare the adhesive, mix the main agent and curing agent of the KS06 glue evenly at a weight ratio of 50:9, and control the solid content at 35% by adding acetone;

[0033] (3) Apply the adhesive evenly on one side of the PET film, and the dry basis coating amount is 5.0g / m 2 ;

[0034] (4) Set the temperature of the oven at 60°C, dry the PET film coated with the adhesive for 2 minutes, and the hot air in the oven contacts the surface of the PET film in a swirling manner;

[0035] (5) Press the PET film and the PVDF film under hot pr...

Embodiment 2

[0040] A kind of production technology of solar cell back plate is characterized in that, comprises the steps:

[0041] (1) Corona is used to treat the surface of the PET film to generate low-temperature plasma, and the free radical reaction on the surface of the PET film makes the polymer cross-linked and the surface becomes rough, thereby increasing the adhesion to polar solvents;

[0042] (2) Use the KS06 glue of Coffey Chemical Co., Ltd. to prepare the adhesive, mix the main agent and curing agent of the KS06 glue evenly in a weight ratio of 50:9, and control the solid content at 40% by adding methyl ethyl ketone;

[0043] (3) Apply the adhesive evenly on one side of the PET film, and the dry basis coating amount is 7.0g / m 2 ;

[0044] (4) Set the temperature of the oven at 70°C, dry the PET film coated with the adhesive for 1.5 minutes, and the hot air in the oven contacts the surface of the PET film in a swirling manner;

[0045] (5) Press the PET film and the PVDF fil...

Embodiment 3

[0049] A kind of production technology of solar cell back plate is characterized in that, comprises the steps:

[0050] (1) Corona is used to treat the surface of the PET film to generate low-temperature plasma, and the free radical reaction on the surface of the PET film makes the polymer cross-linked and the surface becomes rough, thereby increasing the adhesion to polar solvents;

[0051] (2) Use the KS06 glue of Coffey Chemical Co., Ltd. to prepare the adhesive, mix the main agent and curing agent of the KS06 glue evenly in a weight ratio of 50:9, and control the solid content at 45% by adding acetone;

[0052] (3) Apply the adhesive evenly on one side of the PET film, and the dry basis coating amount is 9.0g / m 2 ;

[0053](4) Set the temperature of the oven at 80°C, dry the PET film coated with the adhesive for 1 minute, and the hot air in the oven contacts the surface of the PET film in a swirling manner;

[0054] (5) Press the PET film and the PVDF film under hot pres...

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Abstract

The invention discloses a solar cell backboard and a production technique thereof, the technique comprises the following steps of: (1) performing corona treatment on a PET film; (2) preparing an adhesive by KS06 glue of Coffey Chemical Co. Ltd; (3) coating the adhesive on one surface of the PET film; (4) drying the adhesive; (5) pressing the adhesive coating surface of the PET film with a PVDF film at a hot pressing state; (6) repeating the steps (3)-(5), coating the adhesive on the other surface of the PET film, drying the adhesive, and pressing the PET film with the PVDF film; and (7) curing the pressed solar cell backboard. The solar cell backboard produced by the invention has the advantages of transparency and beauty, excellent electric insulation resistance, hydrolysis aging resistance, dimension stability, water vapor blocking performance, stretching performance and uvioresistant property; besides, the layers in the backboard and the backboard and a solar cell piece wrapping material EVA are firmly and fixedly combined, thereby prolonging the service life of the backboard.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell backboard. Background technique [0002] The solar cell panel is mainly composed of a front plate, a solar cell and a back plate. The front plate is tempered glass with high light transmittance, the solar cell is encapsulated by EVA, and the back plate is mainly used to block water vapor and oxygen, Mechanical protection and insulation. At present, the service requirement of polycrystalline silicon solar cell modules is 25 years, and the backsheet, as a photovoltaic packaging material directly in contact with the external environment on a large area, should have excellent long-term aging resistance, insulation, water vapor barrier and other properties. If the backsheet cannot meet the environmental test in terms of aging resistance, insulation, moisture resistance, etc., the reliability, stability, and durability of the solar cell will not be guaranteed, and the...

Claims

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Application Information

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IPC IPC(8): B32B37/06B32B37/10B32B37/12B32B38/16B32B27/08H01L31/18
Inventor 陈永明帅成忠洪向明
Owner ZHEJIANG DILONG PHOTOELECTRICITY MATERIAL
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