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Black high-reflectivity solar cell backboard and a preparation method thereof

A solar cell, highly reflective technology

Active Publication Date: 2019-05-03
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reflective and heat-insulating layer of the black heat-dissipating solar cell backboard provided by the invention can effectively reflect part of near-infrared rays and shield part of ultraviolet light, and play the role of reflection and heat insulation. The first and second heat-conducting adhesives in the backboard structure The layer has good thermal conductivity and can export part of the heat, so the backplane has good heat dissipation performance, but its reduction of component temperature is mainly achieved through heat conduction and heat dissipation, and the reflection efficiency of solar heat needs to be further improved

Method used

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  • Black high-reflectivity solar cell backboard and a preparation method thereof
  • Black high-reflectivity solar cell backboard and a preparation method thereof
  • Black high-reflectivity solar cell backboard and a preparation method thereof

Examples

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Effect test

Embodiment 1

[0048] A black highly reflective solar cell back sheet in this embodiment has a four-layer structure, including a PET base layer 1 , a weather-resistant layer 2 , an adhesive layer 3 and a black functional paint layer 4 .

[0049] Wherein, the black functional paint layer 4 is made by coating and curing the black functional paint, and the black functional paint comprises the following components in parts by weight:

[0050]

[0051]

[0052] The PET base layer 1 is a PET film layer with a reflectivity of 95% at 400-1600nm and a thickness of 0.25mm. The weather-resistant layer 2 is a polyvinylidene fluoride film layer with a thickness of 0.02mm. The adhesive layer 3 is polyester adhesive Agent layer, its thickness is 0.01mm.

Embodiment 2

[0054] A black highly reflective solar battery backsheet in this embodiment has a four-layer structure, including a PET base layer 1 , a weather-resistant layer 2 , an adhesive layer 3 and a black functional paint layer 4 .

[0055] The black functional coating layer 4 is made by coating and curing the black functional coating, and the black functional coating comprises the following components in parts by weight:

[0056]

[0057]

[0058] The PET base layer 1 is a PET film layer with a reflectivity of 95% at 400-1600nm and a thickness of 0.28mm. The weather-resistant layer 2 is a polyethylene terephthalate layer with a thickness of 0.02mm. The adhesive layer 3 is The polyester adhesive layer has a thickness of 0.01mm.

Embodiment 3

[0060] A black highly reflective solar cell back sheet in this embodiment has a four-layer structure, including a PET base layer 1 , a weather-resistant layer 2 , an adhesive layer 3 and a black functional paint layer 4 .

[0061] The black functional coating layer 4 is made by coating and curing the black functional coating, and the black functional coating comprises the following components in parts by weight:

[0062]

[0063] The PET base layer 1 is a PET film layer with a reflectivity of 95% at 400-1600nm and a thickness of 0.25mm. The weather-resistant layer 2 is a polyvinylidene fluoride film layer with a thickness of 0.02mm. The adhesive layer 3 is a polyurethane adhesive layer with a thickness of 0.008mm.

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Abstract

The invention provides a black high-reflectivity solar cell backboard and a preparation method thereof. The backboard comprises a weather-resistant layer, a bonding layer, a PET substrate layer and ablack functional coating layer, which are sequentially arranged from top to bottom. According to the invention, through the black functional coating layer and the selection of PET substrates with different reflectivity, the infrared band has very high reflectivity when the beautifying effect is obtained. In particular, the reflectivity of 750-1600 nm wave band can reach 30-75%. The sunlight with the wave band of 750-1100 nm can be reflected to a crystalline silicon cell, the utilization efficiency of the sunlight is improved, the power generation power is improved, the sunlight with the wave band of 1100-1600 nm can also be reflected to the air, the reflection efficiency of solar heat is improved, the temperature of an assembly is reduced, and the power generation efficiency of a cell piece is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a black highly reflective solar cell back plate and a preparation method thereof. Background technique [0002] Sunlight is mainly composed of three parts: ultraviolet light (280-380nm), visible light (380-780nm), and near-infrared light (780-2500nm). 50%, and sunlight in the 400-1600nm wavelength range accounts for about 90% of the solar energy. Crystalline silicon solar cells mainly absorb sunlight in the 400-1100nm wavelength range to generate photovoltaic effects and generate current. [0003] The main functional pigment of the traditional white solar cell backsheet is titanium dioxide, which is a highly reflective pigment that can reflect 90% of visible light and near-infrared light. The solar light is reflected to the solar cell to improve the utilization efficiency of the solar light. At the same time, it can also reflect the unnecessary near-infrared light out of the...

Claims

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Application Information

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IPC IPC(8): H01L31/049H01L31/056H01L31/18
CPCY02E10/52
Inventor 刘源夏修旸陈洪野吴小平
Owner CYBRID TECHNOLOGIES INC
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