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Multilayer extrusion type transparent solar photovoltaic backboard

A solar photovoltaic and multi-layer extrusion technology, applied in the field of solar photovoltaic, can solve the problems of acetic acid not easy to discharge, PID phenomenon, easy to produce pollution, etc., achieve high peel strength, avoid recycling pollution, and high water vapor barrier performance.

Pending Publication Date: 2020-10-16
浙江中聚材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One technical solution of the existing transparent backplane is a double glass backplane, but the main problems are: high burst rate, heavy weight, difficult discharge of acetic acid produced, easy to produce PID phenomenon, etc.
A large amount of solvent is used in the production process of the back sheet, which is easy to cause pollution. In addition, it takes a certain time and temperature to cure, and it is easy to reduce the light transmittance of substrates such as PET due to crystallization.

Method used

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  • Multilayer extrusion type transparent solar photovoltaic backboard
  • Multilayer extrusion type transparent solar photovoltaic backboard
  • Multilayer extrusion type transparent solar photovoltaic backboard

Examples

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Effect test

Embodiment 1

[0022] Embodiment one, such as figure 1 As shown, a multi-layer extruded transparent solar photovoltaic backsheet includes a transparent outer layer 1 and a transparent inner layer 2 that are bonded to each other, and the transparent outer layer 1 is polypropylene (PP) and polyolefin elastomer ( POE) mixed to form a transparent modified polyolefin material, wherein the weight ratio of polypropylene to polyolefin elastomer is 100:20, and the transparent outer layer 1 also contains a certain amount of ultraviolet absorbers and antioxidants. The transparent inner layer 2 is made of a transparent modified polyolefin material, and the transparent modified polyolefin material of this layer is formed by mixing polyethylene (PE) and polyolefin elastomer (POE), wherein polyethylene and polyolefin elastomer The weight ratio is 100:20, and the transparent inner layer 2 also contains a certain amount of ultraviolet absorber and antioxidant. The above-mentioned ultraviolet absorbers are b...

Embodiment 2

[0024] Embodiment two, such as figure 2 As shown, a multi-layer extruded transparent solar photovoltaic backsheet includes a barrier protective layer 4, a transparent outer layer 1 and a transparent inner layer 2 arranged in sequence, and the components of the transparent outer layer 1 and the transparent inner layer 2 and The thickness is the same as in Example 1. The barrier protection layer 4 is made of ethylene-vinyl alcohol copolymer (EVOH), and when the barrier protection layer 4 is made of the ethylene-vinyl alcohol copolymer, a certain amount of additives such as plasticizer, heat stabilizer, and antioxidant are added. Control the alkaline earth metal salt in the ethylene-vinyl alcohol copolymer below 5ppm. The ethylene content in the ethylene-vinyl alcohol copolymer is controlled between 25-50 mole percent. Apply viscose between the transparent outer layer 1 and the transparent inner layer 2, between the barrier protective layer 4 and the transparent outer layer 1,...

Embodiment 3

[0025] Embodiment three, such as image 3 As shown, a multi-layer extruded transparent solar photovoltaic backsheet includes a barrier protection layer 4, a transparent outer layer 1, a transparent inner layer 2 and a barrier protection layer 4 arranged in sequence, the transparent outer layer 1 and the transparent inner layer The composition and thickness of layer 2 are the same as those in Example 1. Both barrier protection layers 4 are made of polyvinylidene chloride (PVDC), and their thicknesses are the same as those of the barrier protection layer 4 in the second embodiment. The backsheet is formed by co-extrusion with an extruder, and an adhesive layer 3 with the same function is also formed between the transparent inner layer 1 and the barrier protection layer 4 . The backboard of this embodiment structure is a co-extruded transparent backboard 3 .

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Abstract

The invention discloses a multilayer extrusion type transparent solar photovoltaic backboard, which comprises a transparent outer layer and a transparent inner layer, and is characterized in that thetransparent outer layer is made of a transparent modified material with hydrolysis resistance, light aging resistance, high temperature resistance and high water vapor barrier property, and the transparent inner layer is made of a transparent modified material. A blocking protection layer can be arranged on the side, away from the transparent inner layer, of the transparent outer layer. A blockingprotection layer can be arranged on the side, away from the transparent outer layer, of the transparent inner layer. Glue can be arranged between the transparent outer layer and the transparent innerlayer, between the blocking protective layer and the transparent inner layer and between the blocking protective layer and the transparent outer layer. The transparent solar photovoltaic backboard has excellent hydrolysis resistance and light aging resistance, high water vapor barrier property, high interlayer peeling strength, simple manufacturing process and good light transmittance, does not contain fluorine, is convenient to recycle, can reduce the weight of a component, and reduces the problems of solvent recycling pollution and the like in the production process of the composite back plate.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaics, and in particular relates to a multi-layer extruded transparent solar photovoltaic backplane. Background technique [0002] With the development of photovoltaic technology at the present stage, the photoelectric conversion efficiency is getting closer and closer to the theoretical limit. In order to further improve the photoelectric conversion efficiency, double-sided modules and transparent backsheets will be the development direction of photovoltaic modules in the future. [0003] One technical solution of the existing transparent backplane is a double-glass backplane, but the main problems are: high burst rate, heavy weight, difficult discharge of acetic acid produced, and easy occurrence of PID phenomenon. [0004] 201810577229.X discloses a production process of a KPF structure transparent backsheet, which combines transparent PVDF film and PET film, and then coats a layer of flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/08B32B27/20B32B7/12B32B27/30B32B27/22B32B27/34B32B27/36B32B33/00H01L31/049
CPCB32B27/32B32B27/08B32B27/20B32B7/12B32B27/306B32B27/22B32B27/304B32B27/34B32B27/365B32B27/36B32B33/00H01L31/049B32B2307/552B32B2307/306B32B2307/7265B32B2457/12Y02E10/50
Inventor 蔡书义焦华
Owner 浙江中聚材料有限公司
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