CN201048137Y

CN201048137Y - Concentration type solar cell device

Info

Publication number: CN201048137Y
Application number: CNU2007201482878U
Authority: CN
Inventors: 李晶; 余四祥
Original assignee: BEIJING CO-CHANCE Co Ltd
Current assignee: BEIJING CO-CHANCE Co Ltd
Priority date: 2007-05-18
Filing date: 2007-05-18
Publication date: 2008-04-16
Anticipated expiration: 2017-05-18

Abstract

The utility model relates to a concentrator solar cell device which comprises essentially a frame body, an optical collector and a photovoltaic cell. The concentrator solar cell further comprises packaging glass and radiating fins, wherein, the packaging glass covered on the upper surface of the frame body, and the radiating fins are arranged at the bottom of the photovoltaic cell. The concentrator solar cell device of the utility model not only can improve the service life of the optical collector, but also can effectively ensure the transformation efficiency of photoelectricity of the photovoltaic cell.

Description

Concentrating solar cell device

Technical field

The utility model relates to a kind of solar battery apparatus, particularly a kind of concentrating solar cell device.

Background technology

Concentrating solar cell device mainly adopts Fresnel Lenses as concentrator at present.As shown in Figure 1, existing concentrating solar cell device mainly comprises support 1, Fresnel Lenses 2 and solar panel 3.

Fresnel Lenses can be made by glass or transparent plastic material usually.Since the Fresnel Lenses made of transparent plastic material have cost low, be easy to advantages such as machine-shaping and light weight, therefore extensively adopt transparent plastic material to make Fresnel Lenses at present.Yet the Fresnel Lenses that transparent plastic material is made directly is exposed to for a long time and just can occurs aging under the sunlight and be out of shape, and can reduce the light light transmittance, and then reduce photoelectric conversion rate.Just can be cracked during the lens serious aging, thus the optically focused effect lost.In addition, because Fresnel Lenses directly is exposed in the extraneous ring mirror, lens outer surface is subject to the damage of various severe environmental conditions such as dust storm, hail etc., and maintenance not easy to clean.Therefore, in order to improve the useful life of Fresnel Lenses, need take safeguard measure to it.

In addition, the emittance that the sun produced produces high energy density and is focused on the solar panel under the focussing force of Fresnel Lenses, can make that like this temperature of solar panel is too high, thereby influence the opto-electronic conversion performance of solar panel.For example, 10 ℃ of the every risings of temperature, the output voltage of solar panel then descends about 1 volt, and electromotive power output also descends thereupon, and the working temperature limit of solar panel is 70 ℃.Therefore, can bring into play the opto-electronic conversion effect effectively, need dispel the heat it in order to make solar panel.

Have, with regard to the light transfer characteristic of photovoltaic cell, in certain incident intensity scope, if incident intensity increases, the electric energy of photovoltaic cell output also increases thereupon again.Thereby, in order to obtain enough big incident intensity, must increase the light area that connects of concentrator as far as possible, but excessive connect light area and will be unfavorable for the mould manufacturing.Thereby, in the large-sized solar power station, a plurality of concentrators must be encapsulated to obtain higher output electric energy.

Therefore, need provide a kind of and not only can improve the useful life of concentrator but also can effectively ensure the photoelectric conversion efficiency of solar panel, and the concentrating solar cell device of needed electric energy can be provided.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, and then provides a kind of electric weight of exporting big and can effectively ensure the concentrating solar cell device of photoelectric conversion efficiency.

Concentrating solar cell device of the present utility model mainly comprises framework, concentrator and photovoltaic cell.Described concentrating solar cell device further comprises packaged glass and fin, and wherein said packaged glass is covered in the upper surface of described framework, and described fin is arranged at the photovoltaic cell below.Described concentrating solar cell device also can further comprise support frame, and described support frame is fixed in the inner rim of described framework, and described concentrator is fixed on the described support frame.

Described concentrator comprises at least one spherical crown surface Fresnel Lenses.Described spherical crown surface Fresnel Lenses can be one-body molded, perhaps is spliced by a plurality of Fresnel Lenses unit.

Described photovoltaic cell is arranged at the focal beam spot place of described Fresnel Lenses, and its quantity preferably quantity with Fresnel Lenses is identical.Described photovoltaic cell comprises silicon photovoltaic cell and GaAs photovoltaic cell.

Described packaged glass is preferably light transmittance height and anti-ultraviolet toughened glass.The surface area of described packaged glass need match with the area of described framework upper surface.

Compared with prior art, the beneficial effects of the utility model are, concentrator is packaged in framework inside fully can prevents not only that concentrator is aging but also can reach rainproof, dustproof purpose.In addition, concentrator encapsulated and be photovoltaic cell configuration fin, can effectively ensure the photoelectric conversion rate of whole solar cell.

Description of drawings

Fig. 1 is the schematic diagram of the concentrating solar cell device of prior art;

Fig. 2 is the cutaway view of an embodiment of concentrating solar cell device of the present utility model; And

Fig. 3 is the schematic vertical view of concentrating solar cell device shown in Figure 2.

Embodiment

Fig. 2 is the cutaway view of an embodiment of concentrating solar cell device of the present utility model.Fig. 3 is the schematic vertical view of concentrating solar cell device shown in Figure 2.As shown in Figures 2 and 3, concentrating solar cell device 10 mainly is made of framework 12, concentrator 14 and photovoltaic cell 16.Framework 12 is made by rigid material, for example stainless steel etc.Concentrator 14 is made of one or more spherical crown surface Fresnel Lenses 142.Though schematically show 4 Fresnel Lenses in the present embodiment, the Fresnel Lenses of other quantity also can be set as required.Fresnel Lenses 142 is made by transparent plastic material, is preferably made by Merlon.Fresnel Lenses 142 can adopt mould one-body molded, but also the piecemeal manufacturing is spliced again.

Concentrating solar cell device further comprises support frame 18, in order to support each Fresnel Lenses 142.Support frame 18 is also made by rigid material, and various possible connected modes such as utilization is for example welded, riveted joint, screw, joggle are fixed on the framework 12.Support frame 18 is divided into corresponding part according to the quantity of Fresnel Lenses.Fresnel Lenses 142 is fixed on the support frame 18.

Photovoltaic cell 16 is arranged at the upper surface of framework 12 bottoms, the focal beam spot place of Fresnel Lenses 142.The quantity of photovoltaic cell is identical with the quantity of Fresnel Lenses.Photovoltaic cell 16 can be photovoltaic cell of silicon photovoltaic cell, GaAs photovoltaic cell or other types etc.Below photovoltaic cell 16, be provided with the through hole corresponding 30 in framework 12 bottoms with the size of photovoltaic cell, be filled with heat-conducting glue in the through hole 30.Lower surface in framework 12 bottoms, fin 32 correspondences are arranged at photovoltaic cell 16 belows.Fin 32 can be natural heat dissipation formula fin.Correspondence is provided with fin below each photovoltaic cell, can prevent that photovoltaic battery temperature is too high.

Aging in order to prevent that the Fresnel Lenses long term exposure from occurring down in sunlight, packaged glass 40 is set, so that concentrator is packaged in framework 12 inside fully above concentrator 14.Packaged glass 40 is preferably light transmittance height and anti-ultraviolet toughened glass.The surface area of packaged glass 40 need match with the area of framework 12 upper surfaces.Packaged glass 40 is adhered to the upper surface of framework 12 by glass cement, thereby realizes the gas-tight seal to concentrator 14 and photovoltaic cell 16.Concentrator is packaged in framework inside fully can prevents that not only concentrator is aging, but also can be rainproof, dustproof, thereby be convenient to cleaning and maintenance.

In addition, the light concentrating times of Fresnel Lenses 142 is determined according to the type of the photovoltaic cell that is adopted.For example, the highest optically focused intensity that can bear 5 times of silicon photovoltaic cell, big again incident intensity then can cause the output electric weight to reach capacity, and adopts the photovoltaic cell of other materials (for example GaAs) then can bear higher optically focused intensity.In the present embodiment, when adopting the silicon photovoltaic cell, can adopt light concentrating times is the Fresnel Lenses of 4 times of light intensity.Fresnel Lenses 142 is focused into the hot spot of 4 dual intensities with incident sunlight, and silicon photovoltaic cell 16 is arranged on the focal beam spot place, and at this moment the area of silicon photovoltaic cell only need be slightly larger than 1/4 of equal flat panel silicon photovoltaic cell and gets final product.

More than specific embodiment of the utility model has been carried out exemplary explanation.But these explanations also should not be construed as the qualification of formation to scope of the present utility model.Those skilled in the art can change the technical solution of the utility model under the instruction of above-mentioned explanation and prompting and retrofit.These variations and remodeling all should be in protection ranges of the present utility model.

Claims

1. concentrating solar cell device, comprise framework, concentrator and photovoltaic cell, it is characterized in that further comprising packaged glass and fin, wherein said packaged glass is covered in the upper surface of described framework, and described fin is arranged at described photovoltaic cell below.

2. concentrating solar cell device as claimed in claim 1 is characterized in that further comprising support frame, and described support frame is fixed in the inner rim of described framework, and described concentrator is fixed on the described support frame.

3. concentrating solar cell device as claimed in claim 1 is characterized in that, described concentrator comprises at least one spherical crown surface Fresnel Lenses.

4. concentrating solar cell device as claimed in claim 3 is characterized in that, described spherical crown surface Fresnel Lenses is one-body molded, perhaps is spliced by a plurality of Fresnel Lenses unit.

5. concentrating solar cell device as claimed in claim 3 is characterized in that, the quantity of described photovoltaic cell is identical with the quantity of described Fresnel Lenses.

6. concentrating solar cell device as claimed in claim 5 is characterized in that, described photovoltaic cell is arranged at the focal beam spot place of described Fresnel Lenses.

7. concentrating solar cell device as claimed in claim 6 is characterized in that, described photovoltaic cell below is provided with natural heat dissipation formula fin.

8. concentrating solar cell device as claimed in claim 1 is characterized in that, described photovoltaic cell comprises silicon photovoltaic cell and GaAs photovoltaic cell.

9. concentrating solar cell device as claimed in claim 1 is characterized in that, described packaged glass is the high and anti-ultraviolet toughened glass of light transmittance.