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Optical total reflection film used for photovoltaic module

A total reflection film, photovoltaic module technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problem of low utilization efficiency, and achieve the effect of improving utilization efficiency, improving a grade, and reasonable design

Pending Publication Date: 2018-05-11
ZHONGTIAN TECH ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sunlight is diffusely reflected by the surface of the ribbon, and the reflected light is reflected again on the battery sheet at the interface between the glass and the air to be absorbed and utilized, and this utilization efficiency is very inefficient

Method used

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  • Optical total reflection film used for photovoltaic module
  • Optical total reflection film used for photovoltaic module
  • Optical total reflection film used for photovoltaic module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A light total reflection film 9 for a photovoltaic module, the structure is as attached figure 1 As shown, it includes an adhesive layer 1 , a base layer 2 , a structural layer 3 (including a base 31 and a microstructure 32 ) and a reflective layer 4 . The adhesive layer 1 is located at the bottom, the base layer 2 is located above the adhesive layer 1 , the structural layer 3 is located above the base layer, and the top of the structural layer 3 is provided with a reflective layer 4 . The structural layer 3 includes a base 31 and a microstructure 32 . The microstructure 32 is composed of a plurality of parallel horizontal regular quadrangular prisms. The section of the regular quadrangular prisms is isosceles trapezoidal.

[0031] Wherein the thickness of bonding layer 1 is 10um, and the thickness of base layer 2 is 70um, preferably the short side length of the isosceles trapezoid of microstructure 32 in structure layer 3 is 1um, can deposit reflective layer 4 (alumin...

Embodiment 2

[0034] A light total reflection film 9 for a photovoltaic module, the structure is as attached figure 1 As shown, it includes an adhesive layer 1 , a base layer 2 , a structural layer 3 (including a base 31 and a microstructure 32 ) and a reflective layer 4 . An adhesive layer 1 is located at the bottom, a base layer 2 is located above the adhesive layer 1 , a structural layer 3 is located above the base layer, and the top contains a reflective layer 4 . The structural layer 3 includes a base 31 and a microstructure 32 . The microstructure 32 is composed of a plurality of parallel horizontal regular quadrangular prisms. The section of the regular quadrangular prisms is isosceles trapezoidal.

[0035] Wherein the thickness of the bonding layer 1 is 10um, and the thickness of the base layer 2 is 70um. As preferably, the short side length of the isosceles trapezoid of the microstructure 32 in the structural layer 3 is 1um, so that the reflective layer 4 (aluminized) can be depos...

Embodiment 3

[0038] A light total reflection film for photovoltaic modules. Considering the error in the production of microstructures in actual production, the optimal choice of bottom angle is 25°. Considering the problem that the protruding part of the mold is worn for a long time during the production process, which leads to the increase of the bottom angle of the microstructure, when the bottom angle is still less than 30°, the slight wear of the mold will not affect the total light reflection of the photovoltaic module The reflective effect of the film can prolong the service life and reduce the production cost.

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Abstract

The invention relates to an optical total reflection film used for a photovoltaic module, applied to the photovoltaic field. The optical total reflection film used for the photovoltaic module comprises an adhesive layer, a substrate layer, a structural layer and a reflecting layer; the substrate layer is positioned on the adhesive layer; the structural layer is positioned above the substrate layer; the structural layer comprises a base and a plurality of micro structures arranged in parallel above the base; the bottom surfaces of the micro structures are arranged to form a plane; the reflecting layer is arranged on the micro structures; and the plane formed by arrangement of the bottom planes of the micro structures is directly laminated with the base. By using a quadrangular structure andby optimizing a fracture surface isosceles trapezoid bottom angle, the reflecting layer can be deposited more easily and the maximum sunshine utilization rate can be realized, thereby improving percentage of pass of the product and optical conversion efficiency of the photovoltaic module.

Description

technical field [0001] The invention relates to a light total reflection film for a photovoltaic module, which is applied in the photovoltaic field. Background technique [0002] With the development of the economy, people's demand for energy has increased rapidly, and the depletion of traditional fossil energy and a series of environmental pollution have driven people to look for efficient, sustainable and cleaner energy, and solar energy is a A very good choice. At present, the main way people use solar energy is photovoltaic power generation, and improving the power generation efficiency of photovoltaic modules is the top priority in the photovoltaic field. [0003] The composition of conventional photovoltaic modules from top to bottom is front glass, encapsulation adhesive layer, battery sheet, encapsulation adhesive layer and back plate (or glass). Each cell will be covered with 2~3 ribbons with a width of 2~3mm. The cells can be connected in series through the ribbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/054
CPCH01L31/0547Y02E10/52
Inventor 王同心殷镭城许先华薛群山沈一春
Owner ZHONGTIAN TECH ADVANCED MATERIALS CO LTD
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