Multilayer backsheet for photovoltaic modules, and its production and use in the production of photovoltaic modules

A photovoltaic module and back film technology, applied in the direction of layered products, photovoltaic power generation, chemical instruments and methods, etc., can solve the problem of reduced photovoltaic module operation ability, and achieve good protection effect

Inactive Publication Date: 2012-02-08
EMS PATENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of long-term operation in humid climates, the ability of the photovoltaic module to operate is greatly reduced when water vapor permeates through the material of the back film of the photovoltaic module

Method used

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  • Multilayer backsheet for photovoltaic modules, and its production and use in the production of photovoltaic modules
  • Multilayer backsheet for photovoltaic modules, and its production and use in the production of photovoltaic modules
  • Multilayer backsheet for photovoltaic modules, and its production and use in the production of photovoltaic modules

Examples

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Embodiment Construction

[0051] figure 1 Shown is a multilayer back film 1 for a photovoltaic module comprising a first outer layer 2, a second outer layer 3 and an outer layer arranged between said outer layers 2, 3 and forming a water vapor barrier and / or an oxygen barrier The inner layer 4 is made of a polymer. At least one of said two outer layers 2, 3, preferably both outer layers 2, 3, comprise polyamide, and in a particularly preferred variant of the first embodiment, the two outer layers 2, 3 are made of Same polyamide composition.

[0052] At least the outer layer of the back film closest to the solar cell may be transparent so that an inner layer disposed below the outer layer may be disposed as a reflective layer, the inner layer comprising a white pigment. Preferably, it provides a reflectance of at least 92% or greater, and the white pigment is preferably titanium dioxide. The outer layer of the back film closest to the solar cell is also optionally or preferably provided as a reflect...

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Abstract

A multilayer backsheet (1) for a photovoltaic module according to the invention comprises a first outside layer (2), a second outside layer (3) and at least one inside layer (4, 5) which is arranged between these outside layers (2, 3). This at least one inside layer (4, 5) forms a water-vapor barrier and / or oxygen barrier. All these layers (2, 3, 4, 5) are composed of polymers. The multilayer backsheet (1) for a photovoltaic module according to the invention is characterized in that at least one of the two outside layers (2, 3) comprises a polyamide, and that the at least one inside layer (4, 5) consists of polymers which are no fluoropolymers and do not comprise any polyethylene. Inside layers (4, 5) made of partly aromatic polyesters are used only in combination with at least one outside adhesion promoter layer (6) made of block copolyesteramide.

Description

technical field [0001] The invention relates to photovoltaic modules, ie systems for generating electricity from photovoltaics. Individual solar cells are arranged in such substantially flat photovoltaic modules, or a number of solar cells are combined and interconnected on one surface. According to the current state of the art, solar cells are mainly composed of semiconductor materials, which directly convert incident light into electrical energy. Silicon is the main semiconductor material used for this purpose. In larger photovoltaic solar plants, many modules are connected in series, enabling the installation to provide high voltage and high power. Background technique [0002] Substituting thin layers for conventional silicon materials is known, in addition to CdTe (cadmium telluride), CuIn 1-x Ga x Se 2 (CIGS) is regarded as one of the most outstanding materials for high-efficiency thin-film solar cells (see EMPA's website, laboratory for thin films and photovoltai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/34B32B27/36H01L31/048
CPCB32B27/08Y02E10/52B32B2307/7242B32B2457/12H01L31/048H01L31/1868B32B27/34H01L31/02168H01L31/0481B32B27/16B32B7/12B32B27/286B32B27/288B32B27/304B32B27/306B32B27/308B32B27/32B32B27/36B32B27/38B32B27/40B32B2307/206B32B2307/306B32B2307/308B32B2307/412B32B2307/416B32B2307/71B32B2307/712B32B2307/714B32B2307/7244B32B2307/7246Y02E10/50Y10T428/31721Y10T428/31736
Inventor D·埃策尔M·普夫莱加尔G·斯托普尔曼A·斯图泽
Owner EMS PATENT AG
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