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An adhesive film for photovoltaic modules having a pattern directionally reflecting light on the surface and having a cross-linked surface cured with ultraviolet light

A directional reflection, photovoltaic module technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problem of limited power of the module, and achieve the effect of improving the power of the module, increasing the utilization rate, and reducing the cost of the module

Inactive Publication Date: 2018-12-18
SHANGHAI HIUV NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reflection of light by frosted embossing is diffuse reflection. A large part of sunlight passes through the front layer of film and glass to the atmosphere after being reflected by the white film, and does not reflect to the surface of the cell, so the power of the module is limited.

Method used

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  • An adhesive film for photovoltaic modules having a pattern directionally reflecting light on the surface and having a cross-linked surface cured with ultraviolet light
  • An adhesive film for photovoltaic modules having a pattern directionally reflecting light on the surface and having a cross-linked surface cured with ultraviolet light
  • An adhesive film for photovoltaic modules having a pattern directionally reflecting light on the surface and having a cross-linked surface cured with ultraviolet light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 3% photoinitiator benzophenone, 10% barium sulfate, 20% titanium dioxide and other components to the EVA resin, and mix well. The mixture is melted and extruded in the extruder, and the temperature is controlled at 85°C. The extruded product is cast into a single-layer white film, and the white EVA film battery is embossed into a triangular prism pattern. The depth is 500 μm, the width is 866 μm, the top angle is 160°, the bottom angle is 10°, the angle between the triangular prism pattern and the extrusion direction of the film is 90°, and the film thickness is 0.50 mm. The formed white EVA film is used with a radiation intensity of 2000W / m 2 The ultraviolet lamp is irradiated for 100s to carry out ultraviolet curing and cross-linking. After irradiation, the thickness of the cross-linked surface layer is 0.01 mm, and the degree of cross-linking is 85%.

[0035] Place the white EVA adhesive film in the above example 1 on the back of the cell in the single glass mod...

Embodiment 2

[0037] Add 0.5% photoinitiator 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-acetone, 0.5% photoinitiator in EVA resin 4-methylbenzophenone, 0.1% titanium dioxide and other components, and mix well. The mixture is melted and extruded in the extruder, and the temperature is controlled at 80°C. The extruded product is cast into a white translucent film, and the white translucent EVA film battery is embossed into a square prism pattern. The film thickness was 0.55 mm. The formed white translucent EVA film is used with a radiation intensity of 2000W / m 2 Ultraviolet light is irradiated for 60s to carry out ultraviolet curing and crosslinking. After irradiation, the thickness of the cured and crosslinked surface layer is 0.10 mm, and the degree of crosslinking is between 65% and 75%.

[0038] Place the white translucent EVA adhesive film in the above example 2 on the back of the battery sheet in the double-glass module, and place the triangular prism-shaped embossed surfac...

Embodiment 3

[0040]A double-layer co-extrusion EVA film solution is adopted, one layer of EVA is silver, and 5% of glass beads with metal coating, 0.6% of photoinitiator diaryliodonium salt and other components are added to the EVA resin; One layer of EVA is transparent, using conventional transparent formula. The above components are fully mixed respectively and then added to a double-layer co-extrusion extruder (two extruders) to form a film. When extruding, one side of the silver EVA film battery is embossed into a triangular pyramid pattern. The depth of the pyramid-shaped pattern is 10 μm, the apex angle of the side triangle is 170°, and the thickness of the adhesive film is 0.70 mm. The silver EVA film that will be formed will use a radiation intensity of 2000W / m 2 Ultraviolet light is irradiated for 30s to carry out ultraviolet curing and crosslinking. After irradiation, the thickness of the crosslinked surface layer is 0.05mm, and the degree of crosslinking is between 30% and 40%....

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Abstract

The invention relates to an adhesive film for a photovoltaic module having a pattern directionally reflecting light on a surface and having a cross-linked surface cured with ultraviolet light, the adhesive film comprising an ultraviolet light cured crosslinked surface layer and a non-ultraviolet light cured crosslinked lower layer or a partially ultraviolet light cured crosslinked lower layer, Theadhesive film surface layer has a pattern having a function of directionally reflecting light, the pattern having the function of directionally reflecting light is preferably, but not limited to, a triangular prism type, a quadrangular prism type, a triangular pyramid type, a triangular prism frustum type, a quadrangular pyramid type or a quadrangular pyramid type, and the adhesive film surface layer must be white or silver in color. As the pattern with the function of directionally reflecting light is adopted, the solar light irradiated on the gap part of the battery piece of the module canbe reflected to the surface of the battery piece at a higher proportion, the utilization ratio of the solar light of the module is increased, the module power is improved, and the module cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of adhesive films, more specifically, to the technical field of adhesive films for photovoltaic modules, in particular to an adhesive film for photovoltaic modules whose surface has a pattern of directional light reflection and is cured by ultraviolet rays. Background technique [0002] Solar energy is a green, non-polluting and inexhaustible energy source. Compared with other energy sources, solar energy is ubiquitous and can be used locally in most areas of the earth. Therefore, in the past ten years, solar energy The industry has become the focus of the development of countries around the world. However, the cost of the solar energy industry is relatively high now, so increasing the power of photovoltaic modules to reduce costs is the general trend of the solar industry. [0003] The structure of conventional photovoltaic modules is glass / transparent packaging film / battery / transparent packaging f...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/054
CPCH01L31/0481H01L31/0547Y02E10/52
Inventor 李民覃勇陈晓良杨英
Owner SHANGHAI HIUV NEW MATERIALS
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