Photovoltaic module with light reflecting device

A photovoltaic module and reflective device technology, applied in the field of solar energy, can solve the problems of solar cell heating reducing photoelectric conversion efficiency, inability to convert, affecting safe operation, etc., to achieve the effect of reducing photoelectric conversion efficiency and avoiding heat generation

Pending Publication Date: 2021-07-09
华能陕西发电有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, there is also a technology that uses ordinary reflective film to directly reflect light to the back of the photovoltaic module. Although the back radiation is increased, the long-wave energy in it can not be converted into electrical energy, but it will also cause solar cells to heat up and reduce their photoelectric conversion. efficiency, affecting safe operation

Method used

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  • Photovoltaic module with light reflecting device
  • Photovoltaic module with light reflecting device
  • Photovoltaic module with light reflecting device

Examples

Experimental program
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Embodiment approach

[0029] Beamsplitters are used to reflect and transmit light. According to different spectral characteristics, beamsplitters can be divided into neutral beamsplitters and dichroic beamsplitters. A neutral beamsplitter can split a beam of light into two beams with the same spectral composition; a dichroic beamsplitter can reflect one part of the spectrum and transmit the other part.

[0030] The invention discloses a photovoltaic component with a reflective device, which uses a reflective film with a cut-off wavelength of 900nm. The reflective film used in the present invention splits the solar spectrum at 900nm to divide the solar spectrum into two parts, long wave and short wave. The 900nm cut-off wavelength can be selected from GaAs single-junction solar cells, single-junction dye-sensitized solar cells, single-junction silicon thin-film solar cells, crystalline silicon solar cells, cadmium telluride solar cells and copper indium gallium selenide solar cells.

Embodiment 1

[0032] see figure 1 As shown, the present invention provides a photovoltaic module with a reflective device, including two reflective films, a photovoltaic module 30 and a fixing bracket 50 .

[0033] The working angle of the reflective film is 45°; the photovoltaic module 30 is double-sided photovoltaic;

[0034] The two reflective films are arranged on both sides of the photovoltaic module 30 , and the angle between them and the photovoltaic module 30 is 45°. The photovoltaic module 30 is disposed on the reflective side of the reflective film.

[0035] The two reflective films and the photovoltaic module 30 are fixed on the fixing bracket 50 to fix their positions and angles.

[0036] Sunlight is vertically incident on the reflective film set at 45°, and the short-wavelength light energy with a wavelength below 900nm is reflected to the surfaces of both sides of the photovoltaic module 30 for photovoltaic power generation. Control the temperature rise of photovoltaic modu...

Embodiment 2

[0038] see figure 2 As shown, the reflective film in the present invention includes a substrate 10 and a coating film disposed on the substrate; the coating film includes a first material coating layer 11 and a second material coating layer 12 sequentially overlapped and disposed on the substrate. Both the bottom layer and the topmost layer of the coating are coating layers of the first material. The first material coating layer 11 and the second material coating layer 12 are respectively a high refractive index material coating layer and a low refractive index material coating layer.

[0039] The working band of the reflective film is 400-1800nm, and the substrate 10 is made of hard materials: aluminum sheets, steel sheets, copper sheets, glass sheets, quartz sheets, high borosilicate materials, etc., or flexible plastic substrates, such as EVA film, PI film, etc. .

[0040] The working angle of the reflective film is 45°, and the transmittance in the 400-900nm band is req...

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Abstract

The invention discloses a photovoltaic module with a light reflecting device. The photovoltaic module comprises two reflecting films and a photovoltaic module body. The working angle of the reflecting films is 45 degrees; the photovoltaic module is a double-sided photovoltaic module; the two reflecting films are arranged on the two sides of the photovoltaic module, and the included angle between each reflecting film and the photovoltaic module is 45 degrees; the photovoltaic module body is arranged on the reflecting sides of the reflecting films; the reflecting films comprise substrates and coating films arranged on the substrates; the coating films comprise first material coating film layers and second material coating film layers which are sequentially arranged on the substrates in an overlapping manner; the bottom layers and the topmost layers of the coating films are first material coating film layers; and the first material coating layers and the second material coating layers are made of materials with different refractive indexes. The reflecting films are used for splitting solar energy, short-wave-band light energy is reflected on the mirror surfaces of the reflecting films for photovoltaic use, the situation that infrared long waves directly irradiate the back face of the double-face photovoltaic module to further cause temperature rise of the photovoltaic module is avoided, and the photovoltaic module works at the temperature with higher photoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of solar energy, in particular to a photovoltaic assembly with a light reflecting device. Background technique [0002] 76% of my country's land is full of sunlight, and the distribution of light energy resources is relatively uniform. Photovoltaic power generation has no noise and pollutant emissions. The application technology is mature, safe and reliable. Solar energy is the cleanest, safest and most reliable energy source in the future. Developed countries are taking the development and utilization of solar energy as the main content of the long-term planning of the energy revolution. The photovoltaic industry is increasingly becoming another explosive development industry after the IT and microelectronics industries in the world. [0003] Photovoltaic modules for photovoltaic power generation are composed of high-efficiency crystalline silicon solar cells, backplanes and frames. Conventional photovolta...

Claims

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Application Information

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IPC IPC(8): H02S40/22G02B5/08
CPCG02B5/0833H02S40/22Y02E10/52
Inventor 吴智强房小源彭文博宋戈高虎郑清伟齐国营王本忠郭春友李晓磊田鸿翔马铭远
Owner 华能陕西发电有限公司
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