Polyolefin packing material for solar cell assembly

A solar cell and packaging material technology, applied in electrical components, circuits, photovoltaic power generation, etc., can solve problems such as low adhesive shrinkage, anti-reflection, deterioration of battery surface passivation, and reduced sunlight transmittance. Achieve the effects of easy storage, stable product quality and low PID risk

Inactive Publication Date: 2013-06-12
JIANGSU SVECK NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a packaging material for solar cell modules, EVA has the characteristics of high adhesion, low shrinkage, and antireflection. EVA itself has poor anti-aging performance. Usually, adding ultraviolet stabilizers and peroxide crosslinking agents to EVA can improve its anti-aging UV aging, creep resistance and weather resistance, but under long-term hot and humid environment and ultraviolet light irradiation, the structure of EVA itself will be chemically degraded, which will change the color of the film, and these color changes will reduce the transmittance of sunlight. The photoelectric conversion efficiency is greatly lost. The long-term high voltage of the solar cell module causes leakage current between the glass and the EVA packaging material, and a large amount of charge accumulates on the surface of the cell, which deteriorates the passivation effect of the cell surface and leads to a filling factor. (FF), short-circuit current density (Jsc), and open-circuit voltage (Voc) decrease, reducing the performance of the component

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A single-layer 0.5mm thick polyolefin film includes: 96% octene-modified polyethylene, 2.65% vinyl triperoxy-tert-butylsilane, 0.1% bis(2,2,6,6 - tetramethyl-4-piperidinyl) sebacate, 0.25% of 2-hydroxy-4-n-octyloxybenzophenone;

[0019] Extrusion process: The screw speed is 85 rpm, the temperature of the four heating zones is 125°C, 125°C, 125°C, and 135°C, respectively, and then cast into a film at the head.

Embodiment 2

[0021] Single-layer 0.5mm thick polyolefin film includes: 94% ethylene-propylene copolymer, 1.5% ethyl 3,3-bis(tert-butylperoxy)butyrate, 0.5% trihydroxy Methylpropane trimethacrylate, 2.65% vinyl triperoxy tert-butylsilane, 0.1% bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.25% of 2-hydroxy-4-n-octyloxybenzophenone;

[0022] Extrusion process: the screw speed is 85 rpm, and the temperatures of the four heating zones are 115°C, 115°C, 115°C, and 120°C respectively, and then cast into a film at the machine head.

Embodiment 3

[0024] Single-layer 0.5mm thick polyolefin film includes: 94% butene-modified ethylene, 1.5% ethyl 3,3-bis(tert-butylperoxy)butyrate, 0.5% trihydroxy Methylpropane trimethacrylate, 2% vinyl triperoxy tert-butylsilane, 0.2% bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.3% of 2-hydroxy-4-n-octyloxybenzophenone;

[0025] Extrusion process: the screw speed is 85 rpm, and the temperatures of the four heating zones are 115°C, 115°C, 115°C, and 120°C respectively, and then cast into a film at the machine head.

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PUM

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Abstract

The invention discloses a polyolefin packing material for a solar cell assembly. The polyolefin packing material is composed of following raw materials by weight: 90%-97% of modified polyolefin, 0%-5% of cross-linking agents, 0.5%-3% of silane coupling agents, 0.1%-0.4% of antioxidants, 0.1%-0.3% of ultraviolet absorbers and 0.5%-0.15% of ultraviolet light stabilizers. The raw materials of the polyolefin packing material are easy to obtain. The polyolefin packing material is low in cost, moderate in melt index, high in volume resistance and good in physical property.

Description

technical field [0001] The invention relates to a polyolefin encapsulation material for solar battery components, which is used in the solar energy industry, and is especially suitable for the encapsulation of solar battery components. Background technique [0002] As a packaging material for solar cell modules, EVA has the characteristics of high adhesion, low shrinkage, and antireflection. EVA itself has poor anti-aging performance. Usually, adding ultraviolet stabilizers and peroxide crosslinking agents to EVA can improve its anti-aging UV aging, creep resistance and weather resistance, but under long-term hot and humid environment and ultraviolet light irradiation, the structure of EVA itself will be chemically degraded, which will change the color of the film, and these color changes will reduce the transmittance of sunlight. The photoelectric conversion efficiency is greatly lost. The long-term high voltage of the solar cell module causes leakage current between the gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/5425C08K5/132C08K5/14C08K5/103B29C47/92H01L31/048B29C48/92
CPCY02E10/50H01L31/0481
Inventor 赵世界韩鹏唐铭徽
Owner JIANGSU SVECK NEW MATERIAL
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