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A Fresnel lens with multi-focus spot energy homogenization

A technology of Fresnel lens and energy uniformity, which is applied in the direction of lens, optics, photovoltaic power generation, etc., can solve the problems of increasing the internal consumption of solar cells, reducing the output capacity of solar cells, and uneven irradiation of solar cells, achieving low cost, Improved quality, precision and easy-to-control effects

Active Publication Date: 2016-03-02
SI CHUAN ZHONG SHUN SOLAR ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Fresnel lens spot is uneven, so that the solar cell receives uneven irradiation, generates lateral current, increases the internal consumption of the solar cell, increases the temperature, and reduces the output capacity of the solar cell, while the unevenness of the irradiation The larger the , the larger the lateral current, and this adverse effect will be more serious

Method used

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  • A Fresnel lens with multi-focus spot energy homogenization
  • A Fresnel lens with multi-focus spot energy homogenization
  • A Fresnel lens with multi-focus spot energy homogenization

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The schematic diagram of the multi-focus spot energy homogenization Fresnel lens 1 in this embodiment is as follows: figure 1 Shown. It is composed of four identical unit Fresnel lenses 2 (such as figure 2 Shown) spliced ​​together; the lens surface of the unit Fresnel lens 2 is engraved with concentric arcs from small to large, and the lens surface is pentagonal (shape is a square with missing corners), including the first side 3 , The second side 4 and the third side 5; the two end points of the second side 4 are connected to the first side 3 and the third side 5 respectively; the smallest concentric arc of the lens surface is a semicircle, the second The side 4 completely coincides with the chord of the semicircle; the first side 3 and the third side 5 are symmetrical about the straight line L, which is perpendicular to the second side 4 and passes through the center of the concentric arc of the lens surface. The multi-focus spot energy homogenization Fresnel lens 1 ...

Embodiment 2

[0039] The unit Fresnel lens 2 in the multifocal spot energy homogenization Fresnel lens 1 in this embodiment is cut from a semicircular Fresnel lens according to the following method:

[0040] (1) Divide the circular Fresnel lens (with a diameter of 300mm and the smallest concentric semicircle with a diameter of 5mm) into two semicircular Fresnel lenses 6 along the diameter of the concentric circle;

[0041] (2) Cut a unit Fresnel lens 2 from the semicircular Fresnel lens 6 obtained in step (1), the side length of the unit Fresnel lens 2 is the largest concentric arc of the unit Fresnel lens 2 The ratio of the radius to the length is 1:3; the lens surface of the unit Fresnel lens 2 is a pentagon, and its shape is a square with missing corners, including a first side 3, a second side 4, and a third side 5; The two end points of the second side 4 are respectively connected to the first side 3 and the third side 5, the second side 4 and the straight side of the semicircular Fresnel l...

Embodiment 3

[0045] The unit Fresnel lens 2 in the multi-focus spot energy homogenization Fresnel lens 1 according to this embodiment is cut from a semicircular Fresnel lens according to the following method, which specifically includes the following steps:

[0046] (1) Divide the circular Fresnel lens (with a diameter of 300mm and the smallest concentric semicircle with a diameter of 5mm) into two semicircular Fresnel lenses 6 along the diameter of the concentric circle;

[0047] (2) Cut a unit Fresnel lens 2 from the semicircular Fresnel lens 6 obtained in step (1), the side length of the unit Fresnel lens 2 is the largest concentric arc of the unit Fresnel lens 2 The ratio of the radius to the length is 1:3; the lens surface of the unit Fresnel lens 2 is a pentagon, and its shape is a square with missing corners, including a first side 3, a second side 4, and a third side 5; The two end points of the second side 4 are respectively connected to the first side 3 and the third side 5, the secon...

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Abstract

The invention discloses a multi-focus light spot energy homogenizing Fresnel lens. As the multi-focus light spot energy homogenizing Fresnel lens is obtained through decomposing and recompounding the traditional Fresnel lenses, the unevenness of the light spot energy of the Fresnel lens is reduced greatly, the quality of the light spot can be improved greatly, the uniform irradiation can be received by a solar battery, the generated transverse current is less, the internal consumption of the solar battery is reduced and the output capability of the solar battery is improved.

Description

Technical field [0001] The invention relates to a lens, in particular to a Fresnel lens with multi-focus spot energy homogenization. Background technique [0002] Solar energy has excellent characteristics such as cleanliness, no resource and geographical restrictions, and inexhaustible for humans. It is becoming more and more popular. Among them, solar photovoltaic utilization, that is, the technology of directly converting sunlight into electrical energy through photovoltaic devices, is particularly attractive. [0003] At present, a complete concentrating photovoltaic power generation system mainly includes concentrating solar cell components, sun trackers, electrical energy storage or inverter equipment and other parts. Concentrating solar cell components, as photoelectric conversion components, are mainly composed of transmissive or reflective concentrators and circuit boards mounted with photovoltaic cell wafers. When in use, the condensing lens is basically facing the direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/08H01L31/054
CPCY02E10/52
Inventor 黄忠黄饶帅麒罗敏
Owner SI CHUAN ZHONG SHUN SOLAR ENERGY DEV
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