Light collecting device

A technology of light collection and light reflection, applied in the field of solar cells, to achieve the effects of reducing costs, improving conversion efficiency, and avoiding stability decline

Inactive Publication Date: 2012-10-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no related technology that specifically pays attention to the sunlight on the above-mentioned partially wasted illumination area and utilizes it.

Method used

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Experimental program
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Embodiment 1

[0032] As mentioned in the background art, for the four-sided cut monocrystalline silicon cells, there will be a small quadrangle-like blank area in the middle of every four monocrystalline silicon cells due to its approximate octagonal shape. Such as Figure 2aAs shown, for this situation, the above-mentioned light collection device can adopt a device with a light reflection function. According to the characteristics of the reflection surface of the light reflection device in the summary of the invention, the light reflection device can be a series of pyramid-like structures, and the shape formed by the bottom edge of each pyramid structure intersecting with the plane of the battery panel is just in line with the blank The small quadrilaterals of the area coincide. The four sides of the pyramid structure except the bottom are reflective surfaces, which reflect the light irradiated on it to the monocrystalline silicon cell. The reflection device of the pyramid structure is m...

Embodiment 2

[0035] As mentioned in the background art, for components composed of circular monocrystalline silicon cells, there will be some blank areas between the circular single crystal silicon cells. This part of the blank area can be described as a concave arc quadrilateral according to the arrangement of the circular cells (such as Figure 2b shown), concave arc triangle (such as Figure 2c shown) or some other shape. In this embodiment, the light collection device is designed by taking the blank area as an example of a concave arc triangle. The blank area is a concave arc quadrilateral or some other shapes, which can be similarly designed in the same way. The appearance of the concave arc triangular blank area is formed by the arrangement of circular cells in a hexagonal close-packed manner (honeycomb). In view of this situation, the light collection device can adopt a device with a light reflection function. According to the characteristics of the reflection surface of the lig...

Embodiment 3

[0039] As described in the background technology, the situation between the situation described in Embodiment 1 and Embodiment 2 is not to cut off the four sides of the circular silicon wafer, nor is it not cut at all, but to cut off one or several sides. Edges, for example forming the shape of a crown or semicircle. When the monocrystalline silicon cells of these shapes are combined into battery components, there will also be some irregular blank areas between the monocrystalline silicon cells. In this embodiment, the semicircular cells are arranged side by side in the same direction as an example. There will be a blank area between every four semicircular battery pieces, and the shape of this area is composed of two 90-degree arcs and a straight line, which is called an isosceles concave arc triangle (such as Figure 2d shown). In view of this situation, the light collection device can adopt a device with a light reflection function. According to the characteristics of th...

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PUM

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Abstract

Disclosed is a light collecting device for a monocrystalline silicon battery pack. A blank portion that cannot use the sunlight is left between battery pieces and on an edge section of a pack when the battery pieces are assembled into a pack due to the shape feature of a monocrystalline silicon battery. The light collecting device provided by the invention comprises a light reflection component or a light refraction component. The light reflection component or the light refraction component is arranged on the blank portion for collecting the sunlight above the blank portion and emitting the sunlight to the surface of the battery pieces, thus improving the photoelectric conversion efficiency of solar batteries.

Description

technical field [0001] The invention relates to the technical field of solar cells. In particular, the present invention relates to efficient utilization methods of solar cell modules. Background technique [0002] A solar cell is a device that uses the photovoltaic effect to convert sunlight energy into electricity. In 1954, Bell Laboratories in the United States produced the first modern silicon solar cell based on a PN junction, with a photoelectric conversion efficiency of 6%. After more than half a century of development, the technology of solar cells is constantly improving and maturing. At present, the most widely used commercially used solar cells are silicon-based solar cells. It mainly includes monocrystalline silicon batteries, polycrystalline silicon batteries and amorphous silicon batteries. In the early 1970s, companies such as Sharp, Philips and Solar Power began to prepare small-area commercial battery modules, and gradually began to apply them to the groun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/052H01L31/054
CPCY02E10/50Y02E10/52
Inventor 孟庆波黄小铭张一多李冬梅罗艳红
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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