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Composite package integrated functional solar cell backplane

A solar cell and functional technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of loss of insulation effect of EVA substitute layer, edge overflow and delamination, and reduction of insulation thickness, etc., to achieve high reflective water permeability, The effect of low water permeability and good temperature resistance

Active Publication Date: 2018-03-02
ZHONGTIAN PHOTOVOLTAIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the EVA replacement layer is a single-layer structure. After lamination into components, there are many defects. The main manifestations are: ①After lamination, it is squeezed by the structural reinforcement layer and glass, and there is a phenomenon of edge overflow and delamination; ②The replacement layer It is a micro-foamed polyolefin structure, which is relatively soft. During the lamination process, the battery sheet and the ribbon completely penetrate the EVA replacement layer and directly contact the structural reinforcement layer, resulting in cracks and fragments of the battery sheet; ③ more serious is due to The conductor completely penetrates the EVA replacement layer, causing the EVA replacement layer to completely lose its insulating effect, and can only rely on the weather-resistant layer and the structural reinforcement layer for insulation, and the overall insulation thickness is reduced

Method used

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  • Composite package integrated functional solar cell backplane
  • Composite package integrated functional solar cell backplane
  • Composite package integrated functional solar cell backplane

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0034] Such as figure 2 As shown, a composite encapsulation integrated functional solar cell back sheet disclosed by the present invention, from the outside to the inside, are weather-resistant layer, adhesive layer, PET layer, adhesive layer, and functional layer. The weather-resistant layer is PVDF film. , The thickness is 35μm, the adhesive layer is polyurethane adhesive, the thickness is 10μm, the PTE layer thickness is 200μm, the functional layer includes a single layer of milky white layer and a single layer of transparent layer, of which the milky white layer is glued to the PET layer, and the thickness is 90μm , Consists of 25 parts of polyethylene, 45 parts of polyolefin elastomer, 19 parts of polyolefin plastomer, 10 parts of titanium dioxide, 0.4 part of antioxidant and 0.6 part of ultraviolet absorber. The transparent layer is bonded to the battery sheet, and The thickness is 400μm, and it is composed of 60 parts of polyolefin elastomer, 39 parts of ethylene-vinyl a...

no. 2 example

[0037] Such as image 3 As shown, the composite package integrated functional solar cell back sheet disclosed by the present invention is composed of weather-resistant layer, adhesive layer, PET layer, adhesive layer, and functional layer from outside to inside. The weather-resistant layer is reinforced weather-resistant PET, the thickness is 35μm, the adhesive layer is acrylic adhesive, the thickness is 10μm, the PET layer thickness is 200μm, the functional layer includes a double-layer structure milky white layer and a single transparent layer, of which the lower milky white layer has a thickness of 90μm, made of polyethylene 25 parts, 45 parts of polyolefin elastomer, 19 parts of polyolefin plastomer, 10 parts of titanium dioxide, 0.4 part of antioxidant, and 0.6 part of ultraviolet absorber. The upper layer of milky white layer has a thickness of 20μm, composed of 29 parts of polyethylene and polyolefin. 55 parts of elastomer, 5 parts of polyolefin plastomer, 10 parts of tit...

no. 3 example

[0040] Such as Figure 4 As shown, a composite encapsulation integrated functional solar cell back sheet disclosed by the present invention, from the outside to the inside, are weather-resistant layer, adhesive layer, PET layer, adhesive layer, and functional layer. The weather-resistant layer is PVDF film. , The thickness is 35μm, the adhesive layer is polyurethane adhesive, the thickness is 10μm, the thickness of the PTE layer is 200μm, the functional layer includes a single layer of milky white layer and a double-layer transparent layer, of which the thickness of the milky white layer is 100μm, made of 25 parts of polyethylene , 45 parts of polyolefin elastomer, 19 parts of polyolefin plastomer, 10 parts of titanium dioxide, 0.4 part of antioxidant and 0.6 part of ultraviolet absorber, the thickness of the lower transparent layer is 400μm, 60 parts of polyolefin elastomer, ethylene- It is composed of 39 parts of vinyl acetate copolymer, 0.4 part of antioxidant and 0.6 part of...

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Abstract

The invention discloses a composite package integrated functional solar cell backplane. The photovoltaic backplane includes a weathering layer, an adhesive layer, a PET layer, an adhesive layer and afunctional layer in sequence from outside to inside. The functional layer includes a milky white layer and a transparent layer which are integrally formed. The milky white layer is of a one- or more-layer structure, is 20-200 microns thick, and includes modified inorganic filler, modified resin, ultraviolet absorbent and antioxidant. The transparent layer clings to a cell, is of a one- or more-layer structure, is 200-800 microns thick, and includes modified resin, ultraviolet absorbent and antioxidant. According to the composite package integrated functional solar cell backplane disclosed by the invention, an integrated functional layer is adopted and can replace the traditional film, and the functional layer has high weathering performance, high reflectivity, high insulating performance and low water permeability, and can increase the power of the component while protecting 25 years of service life of the component.

Description

Technical field [0001] The invention relates to a photovoltaic cell backplane, in particular to a composite packaging integrated functional solar cell backplane. Background technique [0002] Crystalline silicon solar cell modules include eight major materials, namely glass, encapsulation film, solar cell, ribbon, silica gel, aluminum frame, junction box, and photovoltaic backplane. Photovoltaic backplane is an extremely important packaging material in photovoltaic modules. The film plays a supporting role, and at the same time it directly contacts the external environment in a large area, and undertakes the important mission of ensuring the stable power generation of photovoltaic modules for 25 years. Excellent insulation, barrier properties and weather resistance are the reliability guarantee for its long-term application. [0003] All the backplanes currently on the market need to add a layer of adhesive film between the backplane and the battery, and the adhesive film is used t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049H01L31/048H01L31/18
CPCH01L31/0481H01L31/1876H01L31/049C09J133/00C09J175/04Y02E10/50
Inventor 刘香安王强王同心陈坤季明龙
Owner ZHONGTIAN PHOTOVOLTAIC MATERIALS
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