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Photovoltaic white adhesive film

A white, adhesive film technology, used in photovoltaic power generation, adhesives, films/sheets without carriers, etc., can solve the problems of high price, increase in cost, and few research results, and achieve easy absorption, multiple light angles, and high power gain. effect of effect

Active Publication Date: 2020-09-08
仇桂芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the white reflective filler is added, it will overflow to the surface of the battery sheet during lamination. After continuous improvement by industry researchers, there are many ways to avoid the overflow of the white reflective filler, but the price of the white reflective filler with better reflection effect is high. , will increase the cost
In the prior art, most of the research on white high-reflection film focuses on improving its reflectivity and addition ratio. How to achieve higher power gain with a lower addition ratio. The reflectivity and power gain effects of high-reflection film are Does not have an absolute linear relationship, involving less research results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A photovoltaic white adhesive film, which is composed of a white adhesive film reflective layer I and a white adhesive film reflective layer II, wherein the reflective layer I is composed of two white adhesive films: the main material of one layer is white EVA, titanium The amount of white powder added is 30% (percentage by weight, the same below), and the weight per square meter is 40 grams; the main material of the other layer is white PE, and the amount of titanium dioxide added is 25%, and the weight per square meter is 40 grams; The co-extrusion method is set together (the two raw materials are respectively melted and stirred by the screw, and co-extruded to form a film at 160-170 ° C), the reflectivity of the co-extruded film (reflective layer I) is 90.8%, and the thickness is 76 microns. The main raw material of the reflective layer II is white EVA, the addition amount of hollow glass microspheres is 1%, the weight per square meter is 300 grams, and the reflectivi...

Embodiment 2

[0030] A photovoltaic white adhesive film, which is composed of a white adhesive film reflective layer I and a white adhesive film reflective layer II, wherein the reflective layer I is composed of two white adhesive films: the main material of one layer is white EVA, titanium The amount of white powder added is 40%, and the weight per square meter is 30 grams; the other layer is a white PET film, the amount of titanium dioxide added is 15%, 18 grams per square meter, and the white EVA film is set on the white PET film by coating. Finally, the reflectance of the reflective layer I is 81%, and the thickness is 49 microns. Reflective layer II is a white EVA film, the addition of titanium dioxide is 2.4%, the weight per square meter is 332 grams, and the reflectivity is 78%. The reflective layer I is directly laid on the reflective layer II (the white PET film is in contact with the reflective layer II), and the two reflective layers are combined into one by means of the pressure...

Embodiment 3

[0032] A photovoltaic white adhesive film, which is composed of a white adhesive film reflective layer I and a white adhesive film reflective layer II, wherein the reflective layer I is composed of two white adhesive films: the main material of the first layer is white EVA, The addition of titanium dioxide is 30%, and the weight per square meter is 40 grams; the main material of the second layer is white EVA, and the addition of titanium dioxide is 30%, and the weight is 40 grams per square meter; the two layers of film are set together by co-extrusion (The two raw materials are melted and stirred by the screw respectively, and co-extruded to form a film at 160-170° C.). The reflectivity of the co-extruded film (reflection layer I) is 91%, and the thickness is 74 microns. The main raw material of the reflection layer II is white EVA, the addition amount of hollow glass microspheres is 7%, the weight per square meter is 300 grams, and the reflectivity is 28%. The reflective lay...

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Abstract

The invention discloses a photovoltaic white adhesive film which is composed of a white adhesive film reflecting layer I and a white adhesive film reflecting layer II which are arranged in a stacked mode, the reflectivity of the reflecting layer I ranges from 75% to 95%, and the reflectivity of the reflecting layer II ranges from 10% to 85%. The reflectivity of the reflecting layer I is higher than that of the reflecting layer II. The two adhesive film reflecting layers are compounded through a compounding process, or the reflecting layers are laid on the back surface of the battery piece andlaminated. A reflective filler is added into the white adhesive film; and the reflective filler is selected from titanium dioxide, silicon dioxide, glass beads and the like. According to the compositephotovoltaic white adhesive film, the cost of the reflective filler can be reduced (the addition amount of the reflective filler in the adhesive film with low reflectivity is lower, or the reflectiveadhesive film is prepared by adopting the reflective filler with low cost) on the premise of the same power gain; or higher or the same power gain is obtained on the premise that the addition amountof the reflective filler is the same or lower, and very high economic value and promotional value are achieved.

Description

technical field [0001] The invention relates to a photovoltaic white adhesive film, which belongs to the technical field of photovoltaic adhesive films. Background technique [0002] Along with environmental pollution and energy crisis, people have begun to devote themselves to the development of new renewable energy. Due to the inexhaustible renewable nature of solar energy, more and more attention has been paid to the rational use of solar energy. Solar cells based on photoelectric conversion technology are an important direction. Therefore, how to improve the photoelectric conversion efficiency of solar cells and reduce the cost, so that it has a cost comparable to traditional energy sources such as coal power, has always been the direction of efforts of researchers in this field. [0003] Highly reflective white film is a research hotspot, which can reabsorb the light through the gap between the reflected cells and be reabsorbed by the cells, thereby increasing the pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J123/08C09J123/06C09J11/04H01L31/048
CPCC09J7/10C09J7/30C09J123/0853C09J123/06C09J11/04H01L31/0481C09J2203/326C08K2003/2241C08K2003/265C09J2423/04C09J2203/322C09J2203/33C08K3/22C08K7/28C08K3/26Y02E10/50
Inventor 仇桂芬
Owner 仇桂芬
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