CN102610601A - Combined solar battery capable of improving solar energy utilization rate - Google Patents

Combined solar battery capable of improving solar energy utilization rate Download PDF

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Publication number
CN102610601A
CN102610601A CN2012100916748A CN201210091674A CN102610601A CN 102610601 A CN102610601 A CN 102610601A CN 2012100916748 A CN2012100916748 A CN 2012100916748A CN 201210091674 A CN201210091674 A CN 201210091674A CN 102610601 A CN102610601 A CN 102610601A
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China
Prior art keywords
solar
battery
solar cell
polymer
combined
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CN2012100916748A
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Chinese (zh)
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曹鸿
褚君浩
王善力
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SHANGHAI SOLAR BATTERY RESEARCH AND DEVELOPMENT CENTER
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SHANGHAI SOLAR BATTERY RESEARCH AND DEVELOPMENT CENTER
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Priority to CN2012100916748A priority Critical patent/CN102610601A/en
Publication of CN102610601A publication Critical patent/CN102610601A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

The invention discloses a combined solar battery capable of improving solar energy utilization rate, which comprises a box body formed by polymer, wherein the box body is internally provided with two solar batteries fixed at the two sides of the inner wall of the box body and two reflectors fixed at the bottom part inside the polymer box body at an angle theta, or the box body is internally provided with an annular solar battery composed of a plurality of sub-batteries, and two cone reflectors; the angle theta is formed by an included angle between a light receiving surface of the reflector and a normal line of an inner bottom part of the polymer box body; the top surface of the box body is covered by a glass top cover capable of penetrating sunlight, so that an incident light area is formed. Due to the combined structure of the solar battery, the utilization rate of the solar energy and the photoelectric conversion efficiency of the solar battery are improved, and the batteries are not interfered with each other in the combined structure; the sub-batteries can be combined freely, the combined solar battery is simple in structure, and the problem existing in a traditional laminated battery is effectively avoided.

Description

A kind of combined solar battery that improves the solar energy utilance
Technical field
The present invention relates to solar cell, specifically be meant a kind of combined solar battery that can greatly improve the solar energy utilance.
Background technology
The problem of environmental pollution that traditional fossil energy generating brings is threatening the human earth of depending on for existence, owing to utilize solar energy to have many advantages, therefore more and more receives the attention of countries in the world.
Because the Energy distribution broad of solar spectrum, existing any semi-conducting material all only can absorb the wherein energy photon higher than its edge energy, remaining photon all can not become electric energy through producing photo-generated carrier.
Prepared solar cell does not all reach desirable photoelectric conversion efficiency at present for this reason.In order to improve the photoelectric conversion efficiency of solar cell; People have attempted the whole bag of tricks; Such as having best matched materials to make battery with energy width and solar spectrum different-waveband; And outside in be superimposed together by energy gap order from big to small, let the shortest light of wavelength by the wide bandgap material battery utilization of ragged edge, the long light of wavelength can transmission enters to let the utilization of narrower gap material battery; So just might convert solar energy to electric energy to greatest extent, the solar cell with this structure is called laminated cell.
The preparation method of traditional laminated cell has two kinds, and a kind of is that machinery piles up method, prepares two independently solar cells earlier, a high bandwidth, a low bandwidth.Then above the battery that is stacked on low bandwidth of high bandwidth; Another kind is incorporate method, prepares a complete solar cell earlier, growth or directly deposit second layer battery on this battery again.Because solar cell is mostly very responsive to temperature, material cross pollution, and the preparation of solar cell often relates to deposition different materials and high-temperature technology.Therefore the laminated cell of this integral structure has limitation, inherent shortcoming is arranged.Machinery piles up the laminated cell that legal system is equipped with, and technology is integrated then can be simply a lot, because it only is discrete separately layer, only needs the individual layer of separation is processed, and need not to carry out currents match, also no longer need consider lattice match.But itself also has complexity to a certain degree the solar cell of mechanical laminated structure; This comprises: how to constitute mechanical laminated; How to make the energy gap coupling between sub-battery, how to increase the transmitance of long luminous energy of wavelength, and how from the sub-battery of separation, to extract electric current etc.
Summary of the invention
For overcoming the problem that above-mentioned prior art exists; The object of the present invention is to provide a kind of transmitance of long luminous energy of energy gap coupling and wavelength that need not to consider; Sub-battery is interference-free each other, and is simple in structure, the combined solar battery that photoelectric conversion efficiency is high.
A kind of combined solar battery that improves the solar energy utilance of the present invention; Comprise: the casing that constitutes by polymer; Two solar cells that are separately fixed at the relative both sides of cabinet wall are arranged in the casing; And there are two to form two symmetrical speculums of θ fixed angle with centre normal at polymer casing inner bottom part; This angle θ is that the angle by the side to light of speculum and polymer casing inner bottom part normal forms, and the end face of casing is stamped the glass roof that can see through sunlight, form an incident light district thus.
Said angle 0＜θ＜90 °, L 3=L 4=L, L 1=L 2=L/cos θ.L 1And L 2Be respectively the length of the solar cell that is fixed on the cabinet wall both sides, L 3And L 4Be respectively the length of two speculums that are fixed on polymer casing bottom.
Said two solar cells can be any in unijunction solar cell or the multijunction solar cell.Or the combination of unijunction solar cell and multijunction solar cell.
Another kind based on above-mentioned same principle of the present invention can improve the combined solar battery of solar energy utilance; Comprise: the casing that constitutes by polymer; There is a circular cone build speculum at casing inner bottom part center; On circular cone build speculum, be wound with the annular solar cell along the cone choma.
The side to light of circular cone build speculum and polymer casing inner bottom part centre normal form angle theta, 0＜θ＜90 °, L 5Be the cone-shaped speculum length of side, L 6Be the height of annular solar cell, L 6=L 5/ cos θ.
The annular solar cell is by the combination in any of the sub-battery of unijunction solar, the sub-battery of multi-junction solar.
Said polymer is any in EVA, PBD, fluoropolymer, Merlon, the polyurethane.
The invention has the advantages that:
1. can realize the arbitrary combination between the battery of any type:
(1). the combination of identical solar cell.Single relatively sub-battery, the present invention can improve the absorption rate of this solar cell combination to same wave band luminous energy, thereby reaches the purpose that improves photoelectric conversion efficiency;
(2). the combination of inhomogeneity solar cell.The present invention can widen this solar cell combination absorbing light can wave-length coverage, and need not consider the problem that traditional laminated cell such as energy gap coupling between sub-battery faces, thereby reach the purpose that improves photoelectric conversion efficiency.
2. can be between sub-battery by any serial or parallel connection.
Description of drawings
Fig. 1 is a kind of combined solar battery structure sketch map of embodiment 1.
Fig. 2 is a kind of combined solar battery structure sketch map of embodiment 2.
Fig. 3 is a cadmium telluride solar battery structure sketch map.
Fig. 4 is tellurium zinc cadmium/monocrystalline silicon lamination solar cell structural representation.
Embodiment
Provide preferred embodiment of the present invention below, and combine accompanying drawing to elaborate.
Embodiment 1
See Fig. 1; This combined solar battery; Comprise: the casing 1 that constitutes by polymer; Two cadmium telluride solar cells that are separately fixed at the relative both sides of cabinet wall 6 and tellurium zinc cadmium/monocrystalline silicon lamination solar cells 7 are arranged in the casing, and at polymer casing inner bottom part two two symmetrical speculums 4,5 with centre normal formation θ fixed angle are arranged, this angle θ is that the angle by the side to light of speculum and polymer casing inner bottom part normal forms; The end face of casing is stamped the glass roof 2 that can see through sunlight, forms an incident light district 3 thus.
The structure of cadmium telluride solar cell 6 is seen Fig. 3, comprising: glass substrate 6-1 deposits electrode layer 6-2 before the transparent conductive oxide, n type CdS Window layer 6-3, p type cadmium telluride absorbed layer 6-4, backplate 6-5 successively on glass substrate.
Tellurium zinc cadmium/monocrystalline silicon lamination solar cell 7 structures are seen Fig. 4; Comprise: glass substrate 7-1, electrode layer 7-2, n type CdS Window layer 7-3, p type tellurium zinc cadmium absorbed layer 7-4, transparency conducting layer 7-5, back electrode 7-6 before the transparent conductive oxide that on glass substrate, deposits successively.Pn knot, backplate 7-10 that surface electrode 7-7, monocrystalline silicon semiconductor n type layer 7-8 and p type layer 7-9 form.
Angle θ will satisfy 0＜θ＜90 °, L 3=L 4=L, L 1=L 2=L/cos θ.θ is the side to light of speculum and the angle that polymer casing inner bottom part normal forms, L 1And L 2Be respectively the cadmium telluride solar cell 6 that is fixed on the cabinet wall both sides and the length of tellurium zinc cadmium/monocrystalline silicon lamination solar cell 7, L 3And L 4Be respectively the length of two speculums 4,5 that are fixed on polymer casing bottom.θ in the present embodiment=60 °, therefore, the length of cadmium telluride solar cell 6 and tellurium zinc cadmium/monocrystalline silicon lamination solar cell 7 is twices of speculum 4,5 length.
Said polymer is any in EVA, PBD, fluoropolymer, Merlon, the polyurethane material.
When sunlight was injected incident light district 3, the sunlight that incides speculum 4 sides to light was reflected and gets into tellurium zinc cadmium/monocrystalline silicon lamination solar cell 7, produces photoelectric current; The sunlight that incides speculum 5 sides to light is reflected and gets into cadmium telluride solar cell 6, produces photoelectric current.
Embodiment 2
See Fig. 2, this combined solar battery pack is identical with embodiment 1 principle, and difference is: changed two speculums 4,5 into circular cone build speculum 8, solar cell 6,7 has been changed into the annular solar cell of being made up of a plurality of sub-batteries 9.
Wherein the side to light of circular cone build speculum 8 and polymer casing 1 inner bottom part centre normal form angle theta; θ in the present embodiment=60 °, the height of the annular solar cell of therefore being made up of a plurality of sub-batteries 9 is twices of circular cone build speculum 8 length of side length.
The sub-battery of wherein forming annular solar cell 9 can be the unijunction solar cell of any material, the combination in any of multijunction solar cell.
When sunlight was injected incident light district 3 through glass roof 2, sunlight was got in the annular solar cell 9 by the reflection of the side to light of circular cone build speculum 8, produces photoelectric current.Through repeatedly coming back reflective, the utilization that has improved solar energy fully, and effectively improved the photoelectric conversion efficiency of solar cell.

Claims (5)

1. combined solar battery that can improve the solar energy utilance comprises: the casing (1) that is made up of polymer is characterized in that:
Two solar cells (6,7) that are separately fixed at the relative both sides of cabinet wall are arranged in the casing; And two speculums (4,5) that form two symmetries of θ fixed angle with centre normal are arranged at polymer casing inner bottom part; This angle θ is that the angle by the side to light of speculum and polymer casing inner bottom part normal forms; The end face of casing is stamped the glass roof (2) that can see through sunlight, forms an incident light district (3) thus;
Said angle 0＜θ＜90 °, L 3=L 4=L, L 1=L 2=L/cos θ; L 1And L 2Be respectively the length of the solar cell that is fixed on the cabinet wall both sides, L 3And L 4Be respectively the length of two speculums that are fixed on polymer casing inner bottom part.
2. according to a kind of combined solar battery that improves the solar energy utilance of claim 1, it is characterized in that: said two solar cells can be the combinations of any or unijunction solar cell and multijunction solar cell in unijunction solar cell, the multijunction solar cell.
3. combined solar battery that can improve the solar energy utilance; Comprise: the casing (1) that constitutes by polymer; There is a circular cone build speculum (8) at casing inner bottom part center, on circular cone build speculum, is wound with annular solar cell (9) along the cone choma;
The side to light of circular cone build speculum and polymer casing inner bottom part centre normal form angle theta, 0＜θ＜90 °, L 5Be the cone-shaped speculum length of side, L 6Be the height of annular solar cell, L 6=L 5/ cos θ.
4. according to a kind of combined solar battery that improves the solar energy utilance of claim 3, it is characterized in that: said annular solar cell is by the combination of the sub-battery of unijunction solar or the sub-battery of multi-junction solar or sub-battery of unijunction solar and the sub-battery of multi-junction solar.
5. according to a kind of combined solar battery that improves the solar energy utilance of claim 1 and 3, it is characterized in that: said polymer is any in EVA, PBD, fluoropolymer, Merlon, the polyurethane.
CN2012100916748A 2012-03-31 2012-03-31 Combined solar battery capable of improving solar energy utilization rate Pending CN102610601A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103000736A (en) * 2012-10-19 2013-03-27 王运怀 Solar photovoltaic conversion device
WO2020258989A1 (en) * 2019-06-26 2020-12-30 南京航空航天大学 Double-sided coupling photovoltaic cell system based on reflection and condensation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148473A (en) * 1979-05-10 1980-11-19 Nec Corp Solar battery
CN201570506U (en) * 2009-11-20 2010-09-01 江苏华创光电科技有限公司 Solar battery high-efficiency light receiving device
CN201804151U (en) * 2010-09-10 2011-04-20 徐诵舜 Negative pressure membrane structured converging lens
CN102362129A (en) * 2009-03-20 2012-02-22 地平线太阳能公司 Reflective surface for solar energy collector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148473A (en) * 1979-05-10 1980-11-19 Nec Corp Solar battery
CN102362129A (en) * 2009-03-20 2012-02-22 地平线太阳能公司 Reflective surface for solar energy collector
CN201570506U (en) * 2009-11-20 2010-09-01 江苏华创光电科技有限公司 Solar battery high-efficiency light receiving device
CN201804151U (en) * 2010-09-10 2011-04-20 徐诵舜 Negative pressure membrane structured converging lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103000736A (en) * 2012-10-19 2013-03-27 王运怀 Solar photovoltaic conversion device
WO2020258989A1 (en) * 2019-06-26 2020-12-30 南京航空航天大学 Double-sided coupling photovoltaic cell system based on reflection and condensation

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Application publication date: 20120725