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EVA (Ethylene Vinyl Acetate) glue film capable of reducing PID (Potential-Induced Degradation) phenomena of photovoltaic module, as well as preparation technology thereof

A technology of photovoltaic modules and phenomena, applied in the direction of photovoltaic power generation, adhesives, electrical components, etc., can solve problems such as damage, and achieve the effects of resisting PID phenomena and good water vapor barrier properties

Inactive Publication Date: 2014-07-16
JIANGSU SVECK NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the industry has a relatively consistent understanding of the PID phenomenon of photovoltaic modules as follows: under humid and hot conditions, water vapor enters the interior of the module through the frame and backplane of the module, and the ester bond of EVA encounters water molecules and hydrolyzes to produce mobile acetic acid molecules. , Acetic acid reacts with sodium silicate, the main component of glass, to produce mobile sodium ions. Under the action of electric field force, the mobile sodium ions will migrate to the surface of the battery through EVA, and destroy the battery through the anti-reflection film. P-N junction structure, which leads to the generation of PID phenomenon

Method used

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  • EVA (Ethylene Vinyl Acetate) glue film capable of reducing PID (Potential-Induced Degradation) phenomena of photovoltaic module, as well as preparation technology thereof
  • EVA (Ethylene Vinyl Acetate) glue film capable of reducing PID (Potential-Induced Degradation) phenomena of photovoltaic module, as well as preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adding 1.5 parts by mass of initiator 2,5-dimethyl-2,5 di-tert-butylperoxyhexane, 0.8 parts by mass of triallyl cyanurate in 100 parts by mass of EVA resin with a vinyl acetate content of 33% Esters, 0.3 parts by mass of β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, 0.3 parts by mass of 2-hydroxy-4-n-octyloxybenzophenone, 0.2 parts by mass of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 parts by mass of vinyl tris(β-methoxyethoxy)silane, 0.5 parts by mass of N , N-bis(2,6-diisopropylphenyl)carbodiimide is mixed evenly through a mixer, put into a single-screw extruder, and plasticized at 90°C for extrusion, stretching, traction, and collection The roll is made into an EVA film with a thickness of about 0.5mm. EVA film volume resistivity: 2×10 15 Ω·cm, water vapor transmission rate (38℃ / 90%RH): 15g / (m 2 ·d), damp heat aging resistance (RH85%, 85℃, 1000h): yellowing index (ΔYI): 1.4.

Embodiment 2

[0027] Adding 1.5 parts by mass of initiator 2,5-dimethyl-2,5 di-tert-butylperoxyhexane, 0.8 parts by mass of triallyl cyanurate in 100 parts by mass of EVA resin with a vinyl acetate content of 33% Esters, 0.3 parts by mass of β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, 0.3 parts by mass of 2-hydroxy-4-n-octyloxybenzophenone, 0.2 parts by mass of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 parts by mass of vinyl tris(β-methoxyethoxy)silane, 0.75 parts by mass of N , N-bis(2,6-diisopropylphenyl)carbodiimide is mixed evenly through a mixer, put into a single-screw extruder, and plasticized at 90°C for extrusion, stretching, traction, and collection The roll is made into an EVA film with a thickness of about 0.5mm. EVA film volume resistivity: 2.5×10 15 Ω·cm, water vapor transmission rate (38℃ / 90%RH): 14.5g / (m 2 ·d), damp heat aging resistance (RH85%, 85℃, 1000h): yellowing index (ΔYI): 1.4.

Embodiment 3

[0029] Adding 1.5 parts by mass of initiator 2,5-dimethyl-2,5 di-tert-butylperoxyhexane, 0.8 parts by mass of triallyl cyanurate in 100 parts by mass of EVA resin with a vinyl acetate content of 33% Esters, 0.3 parts by mass of β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, 0.3 parts by mass of 2-hydroxy-4-n-octyloxybenzophenone, 0.2 parts by mass of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 0.5 parts by mass of vinyl tris(β-methoxyethoxy)silane, 1 part by mass of N , N-bis(2,6-diisopropylphenyl)carbodiimide is mixed evenly through a mixer, put into a single-screw extruder, and plasticized at 90°C for extrusion, stretching, traction, and collection The roll is made into an EVA film with a thickness of about 0.5mm. EVA film volume resistivity: 3.0×10 15 Ω·cm, water vapor transmission rate (38℃ / 90%RH): 14.6g / (m 2 ·d), damp heat aging resistance (RH85%, 85℃, 1000h): yellowing index (ΔYI): 1.4.

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Abstract

The invention discloses an EVA (Ethylene Vinyl Acetate) glue film capable of reducing the PID (Potential-Induced Degradation) phenomena of a photovoltaic module. The EVA glue film is prepared from the following raw materials in percentage by weight: 85%-98% of EVA resin, 0.3%-2% of crosslinking agent, 0.1%-1% of silane coupling agent, 0.03-0.1% of antioxidant, and 0.05%-0.2% of ultraviolet absorbent. The glue film has excellent water vapor barrier property, hydrolysis resistance and insulating property, and can effectively resist the occurrence of the PID phenomena.

Description

technical field [0001] The invention relates to a packaging material for a photovoltaic module, in particular to an EVA adhesive film for reducing the PID phenomenon of a photovoltaic module and a preparation process thereof. Background technique [0002] With the depletion of fossil energy and the serious pollution of the earth's environment, more and more attention has been paid to renewable energy and various green energy. The use of solar power generation is also becoming more and more popular. Solar photovoltaic modules are devices that convert solar energy into electrical energy. With the use of solar modules in different environments, it is found that the photovoltaic modules applied under high temperature and high humidity conditions have long-term ion migration between the packaging material of the module battery and the upper glass under the action of high voltage, which makes the surface of the battery passive. The effect deteriorates, resulting in attenuation of...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K5/14C08K5/3492C08K5/134C08K5/132C08K5/5425C08K5/3435C08J5/18H01L31/048
CPCY02E10/50C08K5/14C08J5/18C08J2323/08C08K5/132C08K5/1345C08K5/3435C08K5/34924C08K5/5425C08L2201/14C08L2203/16C08L2203/204C08L2203/206C09J7/00C09J11/06C09J123/0853C09J2203/322C09J2423/04H01L31/0481C08L23/0853
Inventor 赵世界
Owner JIANGSU SVECK NEW MATERIAL
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