High-reflectivity photovoltaic module packaging film and application thereof

A photovoltaic module packaging, high reflectivity technology, applied in photovoltaic power generation, adhesives, electrical components and other directions, can solve the problems of reducing the processing temperature window of the film, reducing the production efficiency of the module, reducing the fluidity of the film, etc., to improve the photovoltaic Effect of conversion efficiency, improvement of UV resistance, and increased light utilization

Active Publication Date: 2015-04-08
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By using a low-melt index resin as the raw material of the film and matching the appropriate component lamination process, the effect of preventing the overflow of the high-reflection film can be achieved, but the use of a low-melt index base resin reduces the processing temperature window of the film , which increases the processing cost; adopt the method of co-extrusion to form a composite structure of transparent film and high-reflection film, match the appropriate component lamination process, the transparent composite layer can play the role of isolation layer, but co-extrusion processing requires production Additional extrusion equipment is added to the line, which increases the processing cost; the above two high-reflection films usually need to be used in conjunction with a special lamination process, usually using a lower lamination temperature to reduce the fluidity of the film, and at the same time Extended lamination time to achieve the required degree of cross-linking, which further reduces the production efficiency of the assembly
The overall pre-crosslinking treatment of the high-reflection film enables the use of conventional lamination processes. However, since the pre-crosslinked film hardly flows during lamination, residual air bubbles and delamination are serious in the component, and the adhesion of the film The junction performance is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In parts by mass, to 100 parts of ethylene-vinyl acetate copolymer (the mass content of vinyl acetate VA is 28%), add 1 part of photoinitiator benzophenone and 0.5 part of photoinitiator 2-methyl -2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone, add 0.3 parts of thermal initiator tert-butyl peroxyisopropyl carbonate and 0.3 parts of thermal initiator 2,5-Dimethyl-2,5-bis(tert-butylperoxy)hexane, 3 parts trimethylolpropane trimethacrylate and 2 parts pentaerythritol triacrylate , 0.1 part of tackifier vinyltrimethoxysilane, 0.1 part of tackifier γ-(2,3-epoxypropoxy) propyltrimethoxysilane and 0.1 part of N-(β-aminoethyl )-γ-aminopropyltrimethoxysilane, 2 parts of high reflection additive titanium dioxide, 2 parts of high reflection additive indium tin oxide and 3 parts of high reflection additive montmorillonite, and mix well.

[0019] The mixture is melted and extruded in the extruder, the temperature is controlled at 85°C, and the extruded product is cast into ...

Embodiment 2

[0021] In parts by mass, to 100 parts of ethylene-α-octene copolymer, add 0.01 part of photoinitiator isopropylthioxanthone, add 1.5 parts of thermal initiator 1-bis(tert-butyl peroxide)-3 , 3,5-trimethylcyclohexane, 10 parts of co-crosslinking agent trimethylolpropane trimethacrylate, 0.3 parts of tackifier vinyl trimethoxysilane, 10 parts of high reflection additive silica , and mix well.

[0022] The mixture is melted and extruded in the extruder, the temperature is controlled at 85°C, and the extruded product is cast into a film, and the irradiation intensity is 1800W / m in a 70°C drying tunnel 2 UV lamp irradiation for 100s, after cooling, slitting, and coiling processes, a highly reflective film with a thickness of 0.45mm and a surface pre-crosslinking depth of 0.05mm (crosslinking degree is 80%) can be obtained, denoted as S -2.

Embodiment 3

[0024] In parts by mass, in 100 parts of ethylene-methyl methacrylate copolymer, add 0.9 part of photoinitiator benzoin dimethyl ether, add 0.15 part of thermal initiator 1-bis(tert-butyl peroxide)-3,3 , 5-trimethylcyclohexane, 0.7 parts of cross-linking agent trimethylolpropane triacrylate, 5 parts of tackifier γ-aminopropyl triethoxysilane, 15 parts of high reflection additive calcium carbonate, 30 parts antimony tin oxide of high reflection additive, and mix well.

[0025] The mixture is melted and extruded in the extruder, the temperature is controlled at 85°C, and the extruded product is cast into a film, and the irradiation intensity is 1800W / m in a 70°C drying tunnel 2 UV lamp irradiation for 100s, after cooling, slitting, and coiling processes, a highly reflective film with a thickness of 0.45mm and a surface pre-crosslinking depth of 0.1mm (crosslinking degree of 85%) was obtained, denoted as S -3.

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PUM

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Abstract

The invention discloses a high-reflectivity photovoltaic module packaging film. The high-reflectivity photovoltaic module packaging film with a surface pre-crosslinked structure is prepared by the following steps: pre-mixing transparent resin with a high-reflectivity additive and other functional accessories, carrying out melting extrusion, film casting and surface pre-crosslinking treatment, and coiling. By adding the high-reflectivity additive, the ultraviolet-resistance performance of the film can be improved, and meanwhile, the utilization rate of a module on sunlight is enhanced, and therefore the effects of improving the service life and photoelectric conversion efficiency of the module are achieved; meanwhile, by virtue of the surface pre-crosslinked structure, the high-reflectivity layer film can be effectively prevented from overflowing during a photovoltaic module laminating process and the appearance of the module is effectively improved; the packaging film is universal for various laminating processes.

Description

technical field [0001] The invention relates to a high-reflectivity photovoltaic module packaging adhesive film, which is used for the packaging of solar cell components, can improve the reflectivity of the battery back layer structure, improve the utilization efficiency of sunlight by the components, and effectively avoid overflow during the lamination process. white phenomenon. Background technique [0002] In the current society, energy conflicts and environmental problems are becoming more and more prominent, and the development of various clean energy is an inevitable trend. In the past two years, the solar photovoltaic industry has recovered, and the demand for photovoltaic modules has gradually increased. Further improving the photoelectric conversion efficiency and durability of photovoltaic modules is the appeal of the entire photovoltaic industry. [0003] At present, more than 80% of solar cell components are crystalline silicon cell components. The theoretical l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J4/02C09J4/06C09J11/04C09J11/06B29C71/04H01L31/048
CPCY02E10/50
Inventor 熊曦彭瑞群侯宏兵周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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