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Solar rear panel and production method for same

A technology of solar cells and production methods, applied in the field of solar cells, can solve problems such as accelerated degradation behavior, reduced backplane insulation, water vapor barrier and mechanical properties, and water vapor barrier performance decline, achieving good insulation performance and damp heat aging resistance, Good anti-aging performance and chemical stability, the effect of reducing the risk of component failure

Active Publication Date: 2012-08-22
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyester film, especially polyethylene terephthalate, due to the presence of hydrolyzable ester bonds in the main chain structure, will be degraded by the moisture in the environment during use. and alkaline environment will accelerate
The hydrolysis of the polyester film can lead to a decrease in its insulation and mechanical properties, making the polyester film brittle and easy to crack, reducing the water vapor barrier performance, thereby reducing the insulation, water vapor barrier and mechanical properties of the backplane, and increasing component failure. risks of

Method used

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  • Solar rear panel and production method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 100 parts by mass of linear low density polyethylene resin, 1 part by mass of triallyl isocyanurate, 0.2 parts by mass of antioxidant 1010, and 0.2 parts by mass of hindered amine 622 are mixed uniformly in a high-speed kneader, and then Extruded and stretched into a film of 250 μm through a twin-screw extruder. Then carry out cross-linking by electron beam irradiation at a speed of 20 m / min, and the irradiation dose is 10 Mrad to form a cross-linked polyethylene film.

[0050] A 25 μm Tedlar film was laminated on both sides of the cross-linked polyethylene film through a dry lamination process. The adhesive used was a two-component polyurethane glue, and the thickness of the adhesive layer was about 10 μm per layer to obtain a solar cell backsheet.

[0051] The partial discharge test was carried out on the prepared solar cell backsheet, and the results are shown in Table 1.

[0052] The prepared solar cell backboard is exposed to ultraviolet radiation for 2000 hours, ...

Embodiment 2

[0055] 100 parts by mass of EPDM rubber, 0.1 parts by mass of triallyl isocyanurate, 0.1 parts by mass of antioxidant 1076, and 0.4 parts by mass of hindered amine 123 were mixed uniformly in a high-speed kneader, and then double A screw extruder extruded and stretched into a 100 μm film. Then electron beam irradiation cross-linking is carried out at a speed of 20 m / min, and the irradiation dose is 20 Mrad to form a cross-linked EPDM film.

[0056] On both sides of the cross-linked EPDM rubber film, a 25 μm PVDF film is laminated by a dry composite process. The adhesive used is a two-component polyurethane glue, and the thickness of the adhesive layer is about 10 μm per layer to obtain a solar battery backplane. .

[0057] The partial discharge test was carried out on the prepared solar cell backsheet, and the results are shown in Table 1.

[0058] The prepared solar cell backboard is exposed to ultraviolet radiation for 2000 hours, the breaking strength retention rate of th...

Embodiment 3

[0061] 100 parts by mass of EPDM rubber and 0.5 parts by mass of hindered amine 123 were uniformly mixed in a high-speed kneader, and then extruded through a twin-screw extruder to form a film of 400 μm. Then electron beam irradiation cross-linking is carried out at a speed of 20 m / min, and the irradiation dose is 30 Mrad to form a cross-linked EPDM film.

[0062]On both sides of the cross-linked EPDM rubber film, a 25 μm PVDF film is laminated by a dry composite process. The adhesive used is a two-component polyurethane glue, and the thickness of the adhesive layer is about 10 μm per layer to obtain a solar battery backplane. .

[0063] The partial discharge test was carried out on the prepared solar cell backsheet, and the results are shown in Table 1.

[0064] The prepared solar cell backboard is exposed to ultraviolet radiation for 2000 hours, the breaking strength retention rate of the backboard is greater than 70%, and the materials of each layer of the backboard are no...

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Abstract

The invention provides a solar rear panel, which comprises a base layer, a weather-proof layer and a coating layer, wherein the weather-proof layer is compounded on one side of the base layer, the coating layer is composited on the other side of the base layer, and the base layer is obtained by means of cross-linking and curing polyolefin under the action of curing accelerators. The invention further provides a production method for the solar rear panel, and the polyolefin and the curing accelerators are cured into a film and then cross-linked to obtain the solar rear panel. The solar rear panel has fine aging resistance and chemical stability, and is not easy to hydrolyze or degrade, so that the obtained solar rear panel is not easy to crack, fine insulating property, humidity and heat resistance and aging resistance can be constantly kept, and the risk of component failure is reduced. Performance testing results indicate that the breaking strength retention rate of the solar rear panel is higher than 70% when the solar rear panel produced by the production method is exposed in an ultraviolet condition for 2000 hours, and the breaking strength retention rate of the solar rear panel is higher than 80% when the solar rear panel is exposed in an accelerated aging environment for 2000 hours.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell backboard and a production method thereof. Background technique [0002] Solar energy is an inexhaustible renewable energy source for human beings. It is also a clean energy source and does not produce any environmental pollution. Among the effective utilization of solar energy, solar photovoltaic utilization is the fastest-growing and most dynamic research field in recent years, and it is one of the most watched projects. To this end, people have researched and developed solar cells. Crystalline silicon solar cells are currently the most mature solar cells, and they play a dominant role in applications. [0003] Typical crystalline silicon solar cell components include: glass, solar cell sheet, encapsulation film and solar cell back sheet. Among them, the main function of the solar battery backsheet is to improve the overall strength of the solar battery pane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08H01L31/048H01L31/049
CPCY02E10/50
Inventor 吕新坤唐晓东江林栾国栋
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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