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Photovoltaic module adhesive film printed with latticed white ink on surface

A white ink, photovoltaic module technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of reducing reflectivity, affecting power generation efficiency, and low gain.

Inactive Publication Date: 2020-07-10
SHANGHAI HIUV APLLIED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gain of these methods is still not high, because in actual use, a layer of transparent film is still required to be laid on the backplane, which reduces the reflectivity
[0005] In addition, in some high-humidity environments, the performance of the water vapor barrier rate of the battery back material (encapsulation material and back sheet) in the solar cell module will affect the power generation efficiency.

Method used

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  • Photovoltaic module adhesive film printed with latticed white ink on surface
  • Photovoltaic module adhesive film printed with latticed white ink on surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Print a layer B with a thickness of 5 μm on the surface of layer A composed of EVA / POE double-layer co-extrusion film, and the thickness of layer A is 400 μm. Use a vulcanization meter (UKEN Technology Co., Ltd. V9.50MDR type) to test the film at 140 °C The ML value is 0.15N·m, the width of each central grid line of the layer B grid is 2.1cm, the width of the grid used for the short edge of the component is 16mm, and the width of the grid used for the long edge of the component is 12mm. Cut the adhesive film to the size of the solar photovoltaic module, and stack it in the order of glass / common transparent EVA adhesive film / battery sheet / photovoltaic module adhesive film / glass with grid-shaped white ink printed on the surface, and combine this structure and After the comparison module using ordinary transparent EVA film on the upper and lower layers is laminated at 145°C, the module power of this structure is 2% higher than that of the comparison module.

Embodiment 2

[0029] Print layer B with a thickness of 20 μm on the surface of layer A composed of EVA / POE / EVA three-layer co-extrusion film, the thickness of layer A is 600 μm, and use a vulcanization meter (Youcan Technology Co., Ltd. V9.50MDR type) to test the glue at 140 ° C The ML value of the film is 0.3N·m, the width of each central grid line of the layer B grid is 9cm, the width of the grid used for the short edge of the module is 40mm, and the width of the grid used for the long edge of the module is 20mm. Cut the adhesive film to the size of the solar photovoltaic module, and stack it in the order of glass / common transparent EVA adhesive film / battery sheet / photovoltaic module adhesive film / glass with grid-shaped white ink printed on the surface, and combine this structure and After the comparison module using ordinary transparent EVA film on the upper and lower layers is laminated at 145°C, the module power of this structure is 1.5% higher than that of the comparison module.

Embodiment 3

[0031] Print 80 μm thick layer B on the surface of layer A composed of EVA / POE / EVA / POE four-layer co-extrusion film, the thickness of layer A is 200 μm, and test it with a vulcanization meter (UKEN Technology Co., Ltd. V9.50MDR type) at 140 ° C The ML value of the lower adhesive film is 0.25N m, the width of each central grid line of the layer B grid is 3cm, the width of the grid used for the short edge of the component is 16.75mm, and the width of the grid used for the long edge of the component is 22mm. Cut the adhesive film to the size of the solar photovoltaic module, and stack it in the order of glass / common transparent EVA adhesive film / battery sheet / photovoltaic module adhesive film / glass with grid-shaped white ink printed on the surface, and combine this structure and After the comparison module using ordinary transparent EVA film on the upper and lower layers is laminated at 145°C, the module power of this structure is 5% higher than that of the comparison module.

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Abstract

The invention relates to a photovoltaic module adhesive film printed with latticed white ink on the surface, and the adhesive film comprises a bottom layer A and a latticed white ink layer B printed on the surface of the bottom layer A, wherein the bottom layer A is a film formed by co-extruding at least two layers and comprises a polyolefin elastomer layer and an ethylene-vinyl acetate copolymerlayer facing the white ink layer B. According to the adhesive film provided by the invention, the latticed white ink on the surface of the adhesive film just fills gaps among the cells, and light emitted to gaps of the cells can be reflected back to the cells, so the utilization efficiency of the light in the assembly is improved, and the power of the assembly is improved accordingly; due to the fact that the minimum moment ML value of the adhesive film vulcanized at 140 DEG C is greater than or equal to 0.15 N.m, it is indicated that the adhesive film is low in liquidity, and white ink cannotflow to the cells to block the cells. In addition, one layer of the adhesive film is a polyolefin elastomer layer, the water vapor barrier rate is high, the volume resistivity is high, PID attenuation of the assembly is effectively reduced, and power attenuation of the assembly is reduced.

Description

technical field [0001] The invention relates to the technical field of adhesive films, in particular to an adhesive film for photovoltaic modules, in particular to an adhesive film for photovoltaic modules with grid-like white ink printed on its surface. Background technique [0002] Solar energy is a clean, efficient and inexhaustible new energy, with the advantages of safety, reliability, no noise, no pollution, less constraints, low failure rate, and easy maintenance. However, as a low-density energy source, solar energy has a low energy utilization rate, so how to improve the conversion efficiency of solar photovoltaic power generation has always been a hot research topic in the industry. [0003] Conventional solar cell components are photovoltaic glass, adhesive film, battery sheet, adhesive film, and back sheet from top to bottom. In some cases, the glass will be replaced by a transparent plastic film, or the back sheet will be replaced by a glass plate. After many ye...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/054
CPCH01L31/0481H01L31/0547Y02E10/52
Inventor 杨英李民刘俊刚
Owner SHANGHAI HIUV APLLIED MATERIALS CO LTD
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