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Reflective film capable of improving photovoltaic conversion efficiency and preparation method thereof

A technology of photovoltaic conversion and reflective film, which is applied in the field of reflective film, can solve the problems of inconvenient use, difficulty in welding ribbon processing, and low efficiency, and achieve the effect of increasing the reflection area and improving the utilization rate of solar energy

Pending Publication Date: 2018-05-08
CHANGZHOU HUAWEI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of ribbon has problems such as difficult processing, inconvenient use, and high soldering cost.
The second type is a simple reflective film. A reflective strip with a triangular prism structure is pasted on the surface of each welding strip. The structural ridgeline is along the length direction of the welding strip. Limited, part of the light is reflected out of the photovoltaic cell
It is difficult to obtain the maximum conversion efficiency under different sunlight incident angles

Method used

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  • Reflective film capable of improving photovoltaic conversion efficiency and preparation method thereof
  • Reflective film capable of improving photovoltaic conversion efficiency and preparation method thereof
  • Reflective film capable of improving photovoltaic conversion efficiency and preparation method thereof

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Embodiment 1

[0029] 1. Such as Figure 1-2 As shown, the reflective film for improving photovoltaic conversion efficiency of this embodiment includes a substrate layer 1 and an adhesive layer 2 provided on the lower layer of the substrate layer 2, a microstructure layer 3 provided on the upper layer of the substrate layer 1, and The light-reflecting layer 4 above the microstructure layer 3.

[0030] The microstructure layer 3 is composed of a plurality of parallel triangular prisms arranged in sequence. The angle between the extending direction of the triangular prism and the extending direction of the base layer 1 is α, and α is 45°. The cross section of the triangular prism is an isosceles triangle, and the vertex angle of the isosceles triangle is 120°. The apex angle of the isosceles triangle may be a sharp angle or a circular arc angle, and the radius of the circular arc angle is R, 0.5<R<5μm. The vertex angle of an isosceles triangle can also be cut by a straight line or a wavy line, ...

Embodiment 2

[0040] Such as Figure 3-4 As shown, the reflective film for improving photovoltaic conversion efficiency of this embodiment includes a substrate layer 1 and an adhesive layer 2 provided on the lower layer of the substrate layer 2, a microstructure layer 3 provided on the upper layer of the substrate layer 1, and The light-reflecting layer 4 above the microstructure layer 3.

[0041] The microstructure layer 3 is composed of a plurality of parallel triangular prisms arranged in sequence. The extending direction of the triangular prism is consistent with the extending direction of the base layer 1. The cross section of the triangular prism is an isosceles triangle, the vertex angle of the isosceles triangle is 60-145°, the height is 10-500 μm, and the distance between two adjacent triangular prisms is 15-300 μm. The angle between the extending direction of the triangular prism and the extending direction of the base layer 1 is α, and 0<α<90°. In this embodiment, α is 45°. The a...

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Abstract

The invention relates to the technical field of reflective films and in particular to a reflective film capable of improving photovoltaic conversion efficiency and a preparation method thereof. The reflective film comprises a base material layer, an adhesive layer disposed under the substrate layer, a microstructure layer disposed above the substrate layer, a reflective layer disposed above the microstructure layer, wherein the microstructure layer consists of a plurality of triangular prisms which are successively arranged in parallel. The reflective film capable of improving the photovoltaicconversion efficiency can reduce the light reflected outside the photovoltaic glass and improve the solar energy utilization rate.

Description

Technical field [0001] The invention relates to the technical field of reflective films, in particular to a reflective film for improving photovoltaic conversion efficiency and a preparation method thereof. Background technique [0002] At present, commonly used photovoltaic modules need to use solder ribbon to connect the cells in series to form a complete electrical path. Light energy is converted into electrical energy through the cells, and the solder ribbon penetrates all cells to form a transmission circuit. [0003] The surface of the soldering strip is a smooth tin-coated layer. After the sun is irradiated on the surface of the soldering strip and undergoes total reflection, it cannot be used continuously, resulting in a decrease in the utilization rate of sunlight. Its coverage area accounts for about 3% to 4% of the entire battery area, which is equivalent to a loss of 3% to 4% of the output power of the entire solar energy utilization. [0004] At present, in order to mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/054H01L31/18
CPCH01L31/0547H01L31/18Y02E10/52Y02P70/50
Inventor 颜奇旭丁利明蒲溢翟才金
Owner CHANGZHOU HUAWEI ADVANCED MATERIAL
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