Three-layer co-extrusion composite adhesive film for packaging photovoltaic module and preparation method thereof

A photovoltaic module encapsulation and three-layer co-extrusion technology, applied in photovoltaic power generation, adhesives, electrical components, etc., can solve the problems of poor water vapor barrier, poor anti-polarization ability, shortening the service life of components, etc. PID performance, good water vapor barrier performance, and the effect of avoiding service life

Pending Publication Date: 2020-10-20
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the efficiency of the battery sheet, double-sided battery technology has developed rapidly in recent years, but whether it is an N-type or a P-type double-sided battery, the module will accumulate positive charges on the surface of the battery under negative bias, in addition to sodium ion erosion. Polarization, the polarization of the battery leads to the recombination of many and few carriers on the surface, which causes a large attenuation of the short-circuit current and a loss of power
The traditional EVA film has poor anti-polarization ability and cannot meet the requirements of dual-battery anti-PID
[0004] Although POE can meet the requirements of anti-PID, the compatibility between POE film and polar additives is poor, the additives are easy to precipitate and cause slippage, and problems such as air bubbles, slippage, and sheeting are easy to occur during the lamination process; EVA film moisture Poor barrier property, water vapor is easy to invade and reduce the light transmittance and volume resistivity of the film, thereby reducing the power generation efficiency of the module and shortening the service life of the module

Method used

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  • Three-layer co-extrusion composite adhesive film for packaging photovoltaic module and preparation method thereof
  • Three-layer co-extrusion composite adhesive film for packaging photovoltaic module and preparation method thereof
  • Three-layer co-extrusion composite adhesive film for packaging photovoltaic module and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) 100 parts of EVA resin (melt flow rate is 25g / 10min, light transmittance>90%, volume resistivity>1.0×10 15 , melting temperature is 69°C, VA content 25%), 0.7 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.9 parts of tripropenyl isocyanurate, 0.3 parts of vinyl tri-tert-butoxysilane, 0.1 part of dihydroxy-tetra-n-octyl hydroxybenzophenone, 0.1 part of 2,2-dihydroxy-4-methoxybenzophenone, 0.05 part of tetrakis[β-(3,5-di-tert-butyl Base-4-hydroxyphenyl) propionic acid] pentaerythritol ester is mixed evenly, pours in the feed bin of single-screw extruder, stand-by;

[0038] (2) 100 parts of POE resin (melt flow rate is 18g / 10min, light transmittance>90%, volume resistivity>1.0×10 16 , melting temperature is 61°C), 0.2 parts of trimethylolpropane trimethacrylate, 0.7 parts of tert-butyl peroxy-2-ethylhexyl carbonate, 0.9 parts of tripropenyl isocyanurate, 0.3 parts of ethylene Tri-tert-butoxysilane, 0.1 part of dihydroxy-tetra-n-octyl hydroxybenzophenone, 0.05 p...

Embodiment 2

[0042] (1) 100 parts of EVA resin (melt flow rate is 18g / 10min, light transmittance>90%, volume resistivity>1.0×10 15, melting temperature is 65°C, VA content 20%), 0.6 parts of 1,1'-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 0.8 parts of triallyl cyanurea Ester, 0.3 parts of γ-methacryloxypropyltrimethoxysilane, 0.15 parts of bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, 0.15 Part of 2,2-dihydroxy-4-methoxybenzophenone, 0.1 part of n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, mix well, pour Put it into the silo of the single-screw extruder for use;

[0043] (2) 100 parts of POE resin (melt flow rate is less than 15g / 10min, light transmittance> 91%, volume resistivity> 1.0×10 16 , melting temperature is 59°C), 0.3 parts of pentaerythritol tetraacrylate, 0.6 parts of 1,1'-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 0.8 parts of triallyl Cyanurate, 0.3 part of γ-methacryloxypropyltrimethoxysilane, 0.15 part of bis(1,2,2,6,6-pentamethyl-4-pip...

Embodiment 3

[0047] (1) 100 parts of EVA resin (melt flow rate is 28g / 10min, light transmittance>90%, volume resistivity>1.0×10 15 , melting temperature is 68°C, VA content 28%), 0.8 parts of tert-butyl peroxycarbonate-2-ethylhexyl, 0.9 parts of tripropenyl isocyanurate, 0.3 parts of vinyl triisopropoxysilane , 0.1 part of 3,5-di-tert-butyl-4-hydroxy-hexadecyl benzoate, 0.15 part of 2,2-dihydroxy-4-methoxybenzophenone, 0.05 part of three (2,4 -di-tert-butylphenyl) phosphite is mixed evenly, poured in the single-screw extruder feed bin, stand-by;

[0048] (2) 100 parts of POE resin (melt flow rate is 18g / 10min, light transmittance>90%, volume resistivity>1.0×10 15 , melting temperature is 68°C, VA content 28%), 0.2 parts of trimethylolpropane triacrylate, 0.8 parts of tert-butyl peroxycarbonate-2-ethylhexyl ester, 0.9 parts of tripropenyl isocyanurate , 0.3 parts of vinyltriisopropoxysilane, 0.1 parts of 3,5-di-tert-butyl-4-hydroxy-hexadecyl benzoate, 0.05 parts of tris(2,4-di-tert-butylp...

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Abstract

The invention relates to the technical field of photovoltaic module packaging adhesive films, in particular to a three-layer co-extrusion composite adhesive film for packaging a photovoltaic module and a preparation method thereof. The composite adhesive film comprises EVA layers, a POE anti-polarization layer and an EVA layer which are sequentially arranged from top to bottom, wherein EVA resin has a melt flow rate of 5 g/10 min-30 g/10 min, light transmittance of larger than 85%, volume resistivity of larger than or equal to 1.0 * 10<14>, melting temperature of 30-80 DEG C, and VA content of5-30%; POE resin has a melt flow rate of 3 g/10 min-20 g/10 min, light transmittance of greater than 86%, volume resistivity of greater than or equal to 1.0 * 10<15> and melting temperature of 30-80DEG C. The EVA layers are adopted on the two sides of the composite adhesive film, the compatibility of the EVA layers and polar auxiliaries is good, and the problems of bubbles, slippage and piece combining during assembly laminating can be solved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic module packaging adhesive film, in particular to a three-layer co-extruded composite adhesive film for photovoltaic module packaging and a preparation method thereof. Background technique [0002] During the power generation process of traditional single-cell solar photovoltaic modules, the modules will generate negative bias voltage due to ungrounding, and the sodium ions in the glass will pass through the adhesive film layer to erode the cells and form parallel leakage channels, resulting in a decrease in the fill factor of the cells , thereby reducing the power generation efficiency of the battery sheet, resulting in the PID-s phenomenon. This phenomenon can be suppressed by adding an ion trapping agent to EVA. [0003] In order to improve the efficiency of the battery sheet, double-sided battery technology has developed rapidly in recent years, but whether it is an N-type or a P-type dou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J123/08C09J11/06H01L31/048C08F255/02C08F226/06C08F230/08C08F222/14
CPCC08F255/02C08F255/026C09J11/06C09J123/0815C09J123/0853C09J2203/322C09J2423/04C09J7/10C09J7/30H01L31/0481C08F226/06C08F230/08C08F222/103C08F222/104Y02E10/50
Inventor 黄宝玉吕松金旭张刚季志超
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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