A kind of solar battery backplane and its production method

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: 2016-08-24
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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  • A kind of solar battery backplane and its production method
  • A kind of solar battery backplane and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Mix 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 in a high-speed kneader. Extrusion and stretching by a twin screw extruder into a 250μm film. Then, the electron beam irradiation cross-linking is performed at a speed of 20 m / min, and the irradiation dose is 10 Mrad to form a cross-linked polyethylene film.

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

[0051] Partial discharge test was performed on the prepared solar cell backsheet, and the results are shown in Table 1.

[0052] Exposing the prepared solar cell back sheet to ultraviolet radiation for 2000 hours, the breaking strength retention rate of th...

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, 0.4 parts by mass of hindered amine 123 are mixed uniformly in a high-speed kneader, and then subjected to double The screw extruder extruded and stretched into a film of 100 μm. Then electron beam irradiation crosslinking is carried out at a speed of 20 m / min, and the irradiation dose is 20 Mrad to form a crosslinked EPDM rubber film.

[0056] A 25μm PVDF film was laminated on both sides of the crosslinked EPDM rubber film through a dry compounding process. The adhesive used was two-component polyurethane glue, and the thickness of the adhesive layer was about 10μm per layer to obtain a solar cell back sheet. .

[0057] Partial discharge test was performed on the prepared solar cell backsheet, and the results are shown in Table 1.

[0058] Exposing the prepared solar cell back sheet to ultraviolet radiation for 2000 hours, the breaking strength retention rate...

Embodiment 3

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

[0062] A 25μm PVDF film was laminated on both sides of the crosslinked EPDM rubber film through a dry compounding process. The adhesive used was two-component polyurethane glue, and the thickness of the adhesive layer was about 10μm per layer to obtain a solar cell back sheet. .

[0063] Partial discharge test was performed on the prepared solar cell backsheet, and the results are shown in Table 1.

[0064] Exposing the prepared solar cell back sheet to ultraviolet radiation for 2000 hours, the breaking strength retention rate of the back sheet is greater than 70%, and the materials of each layer of the back shee...

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Abstract

The invention provides a solar battery back sheet, which comprises a base layer, a weather-resistant layer compounded on one side of the base layer and a coating layer compounded on the other side of the base layer, and the base layer is made of polyolefin crossed under the action of a curing accelerator. Combined curing obtained. The invention provides a production method of a solar battery backboard, which comprises curing polyolefin and a curing accelerator to form a film, and performing cross-linking treatment to obtain a solar battery backplane. The solar cell back sheet of the present invention has good aging resistance and chemical stability, and is not easy to be hydrolyzed and degraded, thereby ensuring that the obtained solar cell back sheet is not easy to crack, and always maintains good insulation performance and moisture-heat aging resistance, reducing risk of component failure. The performance test results show that the solar battery back plate prepared by the invention has a breaking strength retention rate greater than 70% when exposed to ultraviolet light for 2000 hours; and a breaking strength retention rate greater than 80% when exposed to 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 backplane 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 cause any environmental pollution. Among the effective utilization of solar energy, the utilization of solar energy is the fastest growing and most dynamic research field in recent years, and it is one of the most eye-catching projects. For this reason, people have researched and developed solar cells. Crystalline silicon solar cells are currently the most mature solar cells and occupy a dominant position in applications. [0003] Typical crystalline silicon solar cell components include: glass, solar cells, packaging film and solar cell backsheets. Among them, the main function of the solar cell backplane is to improve the overall strength of the solar cell panel. In addition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/08H01L31/049
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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