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High-reflection photovoltaic module packaging adhesive film with three-layer structure

A photovoltaic module encapsulation, three-layer structure technology, applied in photovoltaic power generation, adhesives, electrical components, etc., can solve the problems of easy delamination of the film, cracked cells, affecting the appearance, etc., to achieve good anti-PID effect and power improvement. Excellent, high reflectivity effect

Pending Publication Date: 2020-10-20
常州斯威克新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, white EVA still has some shortcomings: the white encapsulation film can only increase the power of the module to a limited extent. During the high-temperature lamination process of the module, due to its certain fluidity, it overflows to the front of the battery sheet and the solder ribbon, resulting in problems of whitening and flanging. , thereby affecting the appearance of components, reducing component power and increasing the risk of component hot spots
In addition, the photovoltaic industry pursues higher film reflectivity to obtain higher module power. On the basis of not adding inorganic fillers, many attempts have been made, such as placing a gap reflective film in the cell gap area of ​​the module , or placing a metal reflective film on the entire back of the cell, but the effect is not satisfactory
The reflective film in the gap is shifted and misplaced during lamination, causing part of its area to be on the back of the cell, which not only fails to achieve the effect of reflective gain, but also affects the appearance and has the risk of cracking of the cell; while the reflective film is placed on the entire back of the cell , it will directly cause a large number of cracks in the cell and easy delamination of the adhesive film
With the development of the photovoltaic industry, in recent years, the industry has put forward higher requirements for the anti-PID performance of the white film. Since the main components of the white film are EVA and inorganic fillers, it is difficult to further improve its anti-PID performance.

Method used

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  • High-reflection photovoltaic module packaging adhesive film with three-layer structure

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preparation example Construction

[0033] above as figure 1 The preparation method of the high-reflection photovoltaic module encapsulation film of the shown three-layer structure comprises the following steps:

[0034] (1) After fully mixing the second main body resin and the inorganic filler, co-extrude and granulate through a twin-screw extruder to make a masterbatch;

[0035] (2) Put the masterbatch and the second main resin into the mixer and mix them thoroughly for 5 to 10 minutes, put them into the extrusion hopper, cast them through a single screw or twin screws, and then squeeze them through rubber rollers with a structure on the surface. After cooling, the structural reflective layer is obtained;

[0036] (3) Add the first main body resin, antioxidant and UV stabilizer into the mixer and mix thoroughly for 5 to 15 minutes, and then extrude and cast on the upper surface of the structural reflective layer through a single screw to obtain a transition layer / Structural reflective layer;

[0037] (4) A...

Embodiment 1

[0041] A high-reflection photovoltaic module encapsulation adhesive film with a three-layer structure according to the present invention includes a transition layer 1 , a structural reflection layer 2 , and an encapsulation layer 3 sequentially arranged from top to bottom. The thickness of the transition layer 1 is 75 μm, and the material of the transition layer 1 is the first host resin, antioxidant and UV stabilizer, and the mass ratio of the first host resin, antioxidant and UV stabilizer is 87:5:8. The first main resin is EVA resin, wherein the molar content of vinyl acetate is 15%, the melt flow rate of the first main resin is 0.5g / 10min, and the antioxidant is β-(3,5-di-tert-butyl-4- Octadecyl hydroxyphenyl)propionate and tris(4-nonylphenol)phosphite are mixed, and the UV stabilizer is 2,4-dihydroxybenzophenone. The upper surface of the structural reflection layer 2 is provided with a plurality of parallel first prism structures 21 and a plurality of parallel second pris...

Embodiment 2

[0043] A high-reflection photovoltaic module encapsulation adhesive film with a three-layer structure according to the present invention includes a transition layer 1 , a structural reflection layer 2 , and an encapsulation layer 3 sequentially arranged from top to bottom. The thickness of the transition layer 1 is 100 μm, and the material of the transition layer 1 is the first host resin, antioxidant and UV stabilizer, and the mass ratio of the first host resin, antioxidant and UV stabilizer is 88:4:8. The first main body resin is EVA resin, wherein vinyl acetate molar content is 20%, the melt flow rate of the first main body resin is 2.5g / 10min, antioxidant is three (4-nonylphenol) phosphite, phosphorous acid A mixture of at least two of tris(2,4-di-tert-butylphenyl) esters, the UV stabilizer is succinic acid polymerized with 4-hydroxy-2,2,6,6-tetramethyl-1-pyridine ethanol things. The upper surface of the structural reflection layer 2 is provided with a plurality of parall...

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Abstract

The invention provides a high-reflection photovoltaic module packaging adhesive film with a three-layer structure. The high-reflection photovoltaic module packaging adhesive film is sequentially provided with a transition layer, a structure reflecting layer and a packaging layer from top to bottom, wherein a plurality of parallel first prism structures and a plurality of parallel second prism structures are arranged on the upper surface of the structure reflecting layer, the first prism structure and the second prism structure are intersected to form a #-shaped arrangement, the lower surface of the structure reflecting layer is provided with a plurality of concave hemispherical structures, and the lower surface of the packaging layer is provided with a plurality of protruding T-shaped structures. The high-reflection photovoltaic module packaging adhesive film has the advantages of being high in reflectivity, good in anti-PID effect, simple, efficient and suitable for large-scale application and popularization, and the assembly production technological process cannot be increased.

Description

technical field [0001] The invention belongs to the technical field of the photovoltaic industry, and in particular relates to a three-layer structure high-reflection photovoltaic module encapsulation adhesive film. Background technique [0002] At present, white EVA is usually selected as the back encapsulation film of single-glass photovoltaic modules to increase the reflection on the back, thereby increasing the power of single-glass modules. However, white EVA still has some shortcomings: the white encapsulation film can only increase the power of the module to a limited extent. During the high-temperature lamination process of the module, due to its certain fluidity, it overflows to the front of the battery sheet and the solder ribbon, resulting in problems of whitening and flanging. , thereby affecting the appearance of the module, reducing the power of the module and increasing the risk of hot spots of the module. In addition, the photovoltaic industry pursues higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/30C09J201/00C09J11/06C08L23/08C08L101/00C08K5/134C08K5/526C08K5/132C08K3/22C08J5/18H01L31/048H01L31/054
CPCC09J7/29C09J7/30C09J201/00C09J11/06C08J5/18H01L31/048H01L31/0481H01L31/054C09J2203/326C09J2423/046C08J2323/08C08J2300/00C08J2423/08C08J2400/00C08K5/1345C08K5/526C08K5/132C08K2003/2241C08K5/14C08K5/5425C08K5/00Y02E10/52
Inventor 童伟吕松黄宝玉吴丰华吴斌
Owner 常州斯威克新材料科技有限公司
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