Condensing beam-splitting photovoltaic system

A photovoltaic system and light-splitting technology, which is applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of underutilized long-wavelength light, high current, and the failure of grid cells to achieve optimal working conditions, etc., to achieve strong Effect of energy flux density, high magnification concentrating, and enhanced spectroscopic performance

Pending Publication Date: 2019-08-30
PEKING UNIV SHENZHEN GRADUATE SCHOOL +1
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Problems solved by technology

[0005] Under the standard spectral distribution of AM1.5d, the current obtained by the Ga0.50In0.50P sub-cell and the Ga0.99In0.01As sub-cell are relatively matched, and the current obtained by the Ge sub-cell is relatively large. This current mismatch will cause the Ge sub-cell The optimal working condition cannot be achieved, so the long-wavelength light is not fully utilized

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  • Condensing beam-splitting photovoltaic system
  • Condensing beam-splitting photovoltaic system
  • Condensing beam-splitting photovoltaic system

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Embodiment Construction

[0026] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

A condensing beam-splitting photovoltaic system mainly comprises a first condenser for condensing incident light into condensed light; a beam-splitting element for splitting the condensed light into transmitted light in a specific waveband and reflected light in other wavebands; a second condenser for condensing the reflected light into concentrated light; a collimating lens for collimating the condensed light generated by the first condenser and the projecting condensed light onto the beam-splitting element; a first photovoltaic cell for converting the concentrated light into photovoltaic energy; a second photovoltaic cell for converting the transmitted light into photovoltaic energy. By virtue of the splitting and condensing effect t of the first condenser, the beam-splitting element andthe second condenser, the photovoltaic cells having different PN junctions disposed at a rear end can obtain the matched solar spectral bands and the appropriate amount of solar radiant energy, suchthat the current output from each PN junction of the photovoltaic cells achieves a uniform output effect, thereby contributing to further improving the photoelectric conversion efficiency of the solarcell.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a light-concentrating and splitting photovoltaic system. Background technique [0002] After decades of development, solar power generation technology has established its important position in the field of new energy. Photovoltaic cells are the core devices of solar power generation, and their photoelectric conversion efficiency directly affects the performance of the entire power generation system. How to improve the photoelectric conversion efficiency of photovoltaic cells and the power generation efficiency of photovoltaic systems has always been the goal pursued by researchers in the field of solar power generation. [0003] As we all know, the core of a solar cell is a PN junction. A PN junction corresponds to a fixed band gap, which can only absorb photons in a specific wavelength range and has the highest absorption efficiency for light of a specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/20H02S40/22
CPCH02S40/20H02S40/22Y02E10/52
Inventor 金鹏张军斌吴峰周奇峰邱智贤殷卓君李秀杰
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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