CN204011455U - A kind of high-cooling property solar cell - Google Patents
A kind of high-cooling property solar cell Download PDFInfo
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- CN204011455U CN204011455U CN201420435363.3U CN201420435363U CN204011455U CN 204011455 U CN204011455 U CN 204011455U CN 201420435363 U CN201420435363 U CN 201420435363U CN 204011455 U CN204011455 U CN 204011455U
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- heat
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- cooling property
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
A kind of high-cooling property solar cell, belong to technical field of solar batteries, a kind of high-cooling property solar cell comprises the device layer that can absorb sunlight and produce electric energy, the metal electrode layer of device layer top setting and the back sheet consisting of metal level and heat conduction back sheet that device layer below arranges, arranged outside at back sheet has directed heat-conducting layer, on directed heat-conducting layer, comprise the some heat conductive filaments that extend along one or more directions, heat conductive filament connects outside heat abstractor.Solved the poor technical problem of solar cell heat dispersion in prior art, to avoid Yin Wendu to raise, affected the electricity conversion of solar cell, can effectively avoid the accumulation of heat in its attachment simultaneously.Be widely used on the buildings such as roof, mansion glass curtain wall and security booth.
Description
Technical field
The utility model relates to technical field of solar batteries, relates in particular to a kind of solar cell with high efficient heat dissipation performance.
Background technology
Unijunction, binode or multijunction structure that solar cell is normally comprised of p-type and N-shaped semi-conducting material absorb sunlight and produce electronics and hole, realize opto-electronic conversion.The energy gap E of semi-conducting material
g(T) with the pass of temperature T be:
, E wherein
g(0) being the energy gap of absolute zero, is constant; α and β are the constants relevant to semi-conducting material itself.When temperature increases, the short circuit current (I in solar cell
sc) can slightly increase open circuit (V
oC) and fill factor, curve factor (FF) all can reduce significantly, corresponding power output will decline sharp, solar cell has negative temperature coefficient, for example the temperature coefficient of silicon and gallium arsenide solar cell is respectively-4 * 10
-3/ K and-2 * 10
-3/ K.For example silicon solar cell temperature rises to 60 ℃ from 25 ℃, and its power output can decline approximately 23%.
The patent of application before our company, publication No. is a kind of method that improves III-V compounds of group dissipation from electronic devices of CN 103258863, disclose solar cell and comprised device layer and back sheet, this back sheet comprises the metal level boning with device layer and adheres to the heat conduction back sheet on metal level, with heat conduction back sheet, substitute hot non-conductor polymeric layer, improve the heat dispersion of solar cell.Yet, if solar cell is exposed to the sun for a long time under burning sun, its temperature is likely elevated to 60 ℃, even higher temperature, now the photoelectric conversion efficiency of solar cell and power output will obviously decline, and even cause battery failure maybe can not meet the power demands of power consumption equipment.Therefore, needing a kind of solar cell with high heat dispersion that photoproduction heat energy is dredged to other places effectively also realizes and efficiently, stably produces electric energy.
Architecture-integral photovoltaic (BIPV) is flourish market of field of solar energy at present.Be integrated in the solar cell above such as roof, mansion glass curtain wall and outdoor security booth roof, both can effectively more than 25% solar energy be converted to electric energy, can reduce significantly the temperature in building again.
utility model content
For this reason, technical problem to be solved in the utility model is that the heat dispersion of existing solar cell is poor, thus propose a kind of can be by heat directional transmissions to the high-cooling property solar cell on heat abstractor.
For solving the problems of the technologies described above, the utility model provides following technical scheme:
A kind of high-cooling property solar cell, comprise the device layer that can absorb sunlight and produce electric energy, the metal electrode layer of device layer top setting and the back sheet being formed by metal level and heat conduction back sheet that device layer below arranges, arranged outside at back sheet has directed heat-conducting layer, on directed heat-conducting layer, comprise the some heat conductive filaments that extend along one or more directions, heat conductive filament connects outside heat abstractor.
As optimization, heat conductive filament comprises wire or carbon fiber or its combination.
As optimization, directed heat-conducting layer is by horizontal and vertical wire, carbon fiber or its heat conduction fabric constituting.
As optimization, the heat conduction fabric that directed heat-conducting layer is served as reasons laterally and/or the thermal conductive polymer of wire, carbon fiber or its combination longitudinally and insulation forms.
As optimization, directed heat-conducting layer is bonded in the outside of back sheet by heat-conducting glue.
As optimization, device layer comprises unijunction, the binode being comprised of Ⅲ-Ⅴ compound semiconductor material or ties laminated construction more, and device layer thickness is 1-20 μ m.
Technique scheme of the present utility model has the following advantages compared to existing technology:
1. a kind of high-cooling property solar cell of the present utility model, comprise the back sheet that device layer, metal electrode layer and device layer below arrange, arranged outside at back sheet has directed heat-conducting layer, on directed heat-conducting layer, comprise the some heat conductive filaments that extend along one or more directions, heat conductive filament connects outside heat abstractor.Utilize heat conductive filament's directed thermal conductivity that heat orientation is exported on heat abstractor, the temperature that reduces solar cell itself guarantees the service behaviour of solar cell, can avoid the accumulation of its attachment internal heat simultaneously, reduces its temperature.
2. on a kind of high-cooling property solar cell of the utility model, the heat conductive filament in directed heat-conducting layer comprises wire, carbon fiber or its combination, wire and carbon fiber have anisotropy heat conductivility significantly, wire be take copper wire as example, its axial thermal conductivity is 396w/mk, and the axial thermal conductivity of carbon fiber is 700 w/mk.Therefore can, by heat directional transmissions to radiator, improve the oriented heat dissipating effect of solar cell.In addition, the tensile modulus of elasticity of copper wire and carbon fiber reaches respectively 100 Gpa and 230 Gpa, can, when guaranteeing solar cell flexible, strengthen its tensile strength.Therefore, can perfection attach to roof, mansion glass curtain wall and outdoor security booth roof etc. above building.
3. a kind of high-cooling property solar cell that the utility model provides, the heat conduction fabric that its directed heat-conducting layer is served as reasons laterally and/or the thermal conductive polymer of wire or carbon fiber and insulation longitudinally forms.Thermal conductive polymer is insulating material, can effectively prevent solar cell electric leakage, guarantees human-body safety.
4. a kind of high-cooling property solar cell that the utility model provides, its device layer mainly comprises unijunction, the binode being comprised of Ⅲ-Ⅴ compound semiconductor material or ties laminated construction more, described device layer thickness is 1-20 μ m.By regulating the component of III-V group iii v compound semiconductor material, can make the electricity conversion of solar cell higher than 25%.Owing to having peeled off the backing material of heavy and rigidity, the device layer thickness of GaAs based solar battery only ten microns of left and right and weight is only also 1/10th original left and right.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of an embodiment of a kind of high-cooling property solar cell of the utility model;
Fig. 2 is the schematic diagram that a kind of high-cooling property solar cell of the utility model is integrated into roof surface.
In figure, Reference numeral is expressed as: 1-heat conductive filament, the directed heat-conducting layer of 2-, 3-heat conduction back sheet, 4-metal level, 5-device layer, 6-metal electrode layer, 7-heat abstractor.
Embodiment
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail below.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of high-cooling property solar cell, comprise the device layer 5 that can absorb sunlight and produce electric energy, the metal electrode layer 6 of device layer 5 tops settings and the back sheet being formed by metal level 4 and heat conduction back sheet 3 that device layer 5 belows arrange, arranged outside at back sheet has directed heat-conducting layer 2, on directed heat-conducting layer 2, comprise the some heat conductive filaments 1 that extend along one or more directions, heat conductive filament 1 connects outside heat abstractor 7.
After solar cell being integrated on the buildings such as roof, mansion glass curtain wall and outdoor security booth roof, can utilize heat conductive filament 1 that heat orientation is exported on heat abstractor 7, after avoiding long strong sunlight to irradiate, because the rising of solar cell temperature affects its service behaviour, also can avoid heat to be delivered to interior of building, after accumulation, cause its internal temperature too high simultaneously.
Metal level 4 can be used as heat conduction supporting course, also can be used as back electrode, and thickness is 2 microns of left and right.
In order to improve the directed thermal conductivity of a kind of high-cooling property solar cell that the present embodiment provides, heat conductive filament 1 comprises wire or carbon fiber or its combination.
The tensile modulus of elasticity of copper wire and carbon fiber reaches respectively 100 Gpa and 230Gpa, for when guaranteeing solar cell flexible, strengthens its tensile strength.The heat conduction fabric of directed heat-conducting layer 2 for being interweaved by horizontal and vertical wire, carbon fiber or its combination in the present embodiment.
A kind of high-cooling property solar cell that the utility model embodiment provides, its directed heat-conducting layer 2 is bonded in the outside of back sheet by heat-conducting glue, also can be fixed on by other heat conduction binding materials the outside of back sheet.
Device layer 5 in a kind of high-cooling property solar cell of the present embodiment comprises unijunction, the binode being comprised of Ⅲ-Ⅴ compound semiconductor material or ties laminated construction more, III-V family semiconductor solar cell comprises GaAs conventionally, AlAs, GaInP, AlGaInP, unijunction, the binode that the binary such as GaInAs or GaInNAs, ternary or quaternary compound semiconductor material form or tie laminated construction, realizes solar energy wide region, absorbs expeditiously more.The photoelectric conversion efficiency of unijunction He Duojie III-V family semiconductor solar cell under non-optically focused condition reached respectively 28% and 38% at present, is the most efficient solar cell.Described device layer 5 thickness are only 1-20 μ m, and this high-cooling property solar cell is lightweight and have an extraordinary flexibility.
Embodiment 2
As shown in Figure 1, the present embodiment provides a kind of high-cooling property solar cell, comprise the device layer 5 that can absorb sunlight and produce electric energy, the metal electrode layer 6 of device layer 5 tops settings and the back sheet being formed by metal level 4 and heat conduction back sheet 3 that device layer 5 belows arrange, arranged outside at back sheet has directed heat-conducting layer 2, on directed heat-conducting layer 2, comprise the some heat conductive filaments 1 that extend along one or more directions, heat conductive filament 1 connects outside heat abstractor 7.After solar cell is integrated on building body, can utilize heat conductive filament 1 that heat orientation is exported on heat abstractor 7.
In order to improve the directed thermal conductivity of a kind of high-cooling property solar cell that the present embodiment provides, heat conductive filament 1 comprises wire or carbon fiber or its combination.
For fear of a kind of high-cooling property solar cell, affect human-body safety because of electric leakage, as the optimization to embodiment 1, the present embodiment is designed to by directed heat-conducting layer 2 the heat conduction fabric that the thermal conductive polymer by laterally and/or longitudinally wire or carbon fiber and insulation forms, or serves as reasons laterally or heat conduction fabric that the thermal conductive polymer of wire and carbon fiber and insulation longitudinally forms.Thermal conductive polymer is insulating material, and wire and carbon fiber is coated within it in case leak-stopping is electric.
A kind of high-cooling property solar cell that the utility model embodiment provides, its directed heat-conducting layer 2 is bonded in the outside of back sheet by heat-conducting glue, also can be fixed on by other heat conduction binding materials the outside of back sheet.
Device layer 5 in a kind of high-cooling property solar cell of the present embodiment comprises unijunction, the binode being comprised of Ⅲ-Ⅴ compound semiconductor material or ties laminated construction more, III-V family semiconductor solar cell comprises GaAs conventionally, AlAs, GaInP, AlGaInP, unijunction, the binode that the binary such as GaInAs or GaInNAs, ternary or quaternary compound semiconductor material form or tie laminated construction, realizes solar energy wide region, absorbs expeditiously more.The photoelectric conversion efficiency of unijunction He Duojie III-V family semiconductor solar cell under non-optically focused condition reached respectively 28% and 38% at present, is the most efficient solar cell.Described device layer 5 thickness are only 1-20 μ m, so this high-cooling property solar cell is lightweight and have extraordinary flexibility, can perfect be integrated into the surface of other objects.
A kind of high-cooling property solar cell that the utility model provides, can be integrated in above villa roof, mansion glass curtain wall and outdoor security booth roof etc., both can effectively more than 25% solar energy be converted to electric energy, can reduce significantly the temperature in building again.Especially in summer, can effectively reduce indoor temperature, further to save the energy consumption of air-conditioning.Shown in Fig. 2, be solar cell is integrated into roof, house W
1schematic diagram.
A preparation method for high-cooling property solar cell, the high-cooling property solar cell for the manufacture of in embodiment 1 or 2, comprises the following steps:
1) at GaAs substrate successively epitaxial growth sacrifice layer, and can absorb sunlight and produce the device layer 5 of electric energy, on device layer 5 surfaces, form the back sheet being formed by metal level 4 and heat conduction back sheet 3, utilize selective corrosion corrosion to fall sacrifice layer, at the surperficial connection metal electrode layer 6 of the device layer 5 that peels off sacrifice layer and substrate;
2) on back sheet surface, by heat-conducting glue, be fixedly connected with the directed heat-conducting layer 2 that comprises some heat conductive filaments 1 formation of extending along one or more directions;
3) heat conductive filament 1 free end is connected with heat abstractor 7, utilizes heat conductive filament 1 anisotropy heat conductivility to improve the oriented heat dissipating of this high-cooling property solar cell.
In order to improve the oriented heat dissipating effect of solar cell, in the preparation method of a kind of high-cooling property solar cell of the present embodiment, using step 2) in interior wire or the carbon fiber of arranging of directed heat-conducting layer 2 as heat conductive filament 1, because wire and carbon fiber have anisotropy heat conductivility significantly, wire be take copper wire as example, and its axial thermal conductivity is 396 w/mk, and the axial thermal conductivity of carbon fiber is 700 w/mk, therefore can be by heat directional transmissions to heat abstractor, thus better heat radiation.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all execution modes.And among the protection range that the apparent variation of being extended out thus or change are still created in the utility model.
Claims (6)
1. a high-cooling property solar cell, comprise the device layer (5) that can absorb sunlight and produce electric energy, the metal electrode layer (6) of device layer (5) top setting and the back sheet being formed by metal level (4) and heat conduction back sheet (3) that described device layer (5) below arranges, it is characterized in that: the arranged outside at described back sheet has directed heat-conducting layer (2), on described directed heat-conducting layer (2), comprise the some heat conductive filaments (1) that extend along one or more directions, described heat conductive filament (1) connects outside heat abstractor (7).
2. a kind of high-cooling property solar cell as claimed in claim 1, is characterized in that: described heat conductive filament (1) comprises wire or carbon fiber or its combination.
3. a kind of high-cooling property solar cell as claimed in claim 2, is characterized in that: described directed heat-conducting layer (2) is by horizontal and vertical wire, carbon fiber or its heat conduction fabric constituting.
4. a kind of high-cooling property solar cell as claimed in claim 2, is characterized in that: the heat conduction fabric that described directed heat-conducting layer (2) is served as reasons laterally and/or the thermal conductive polymer of wire, carbon fiber or its combination longitudinally and insulation forms.
5. according to a kind of high-cooling property solar cell described in any one in claim 1-4, it is characterized in that: described directed heat-conducting layer (2) is bonded in the outside of described back sheet by heat-conducting glue.
6. a kind of high-cooling property solar cell as described in any one in claim 1-4, it is characterized in that: described device layer (5) comprises unijunction, the binode being comprised of Ⅲ-Ⅴ compound semiconductor material or tie laminated construction more, described device layer (5) thickness is 1-20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420435363.3U CN204011455U (en) | 2014-08-04 | 2014-08-04 | A kind of high-cooling property solar cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420435363.3U CN204011455U (en) | 2014-08-04 | 2014-08-04 | A kind of high-cooling property solar cell |
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| CN204011455U true CN204011455U (en) | 2014-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009587A (en) * | 2019-11-25 | 2020-04-14 | 湖南红太阳新能源科技有限公司 | Photovoltaic module for atmospheric environment restoration and power generation multiplexing |
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2014
- 2014-08-04 CN CN201420435363.3U patent/CN204011455U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009587A (en) * | 2019-11-25 | 2020-04-14 | 湖南红太阳新能源科技有限公司 | Photovoltaic module for atmospheric environment restoration and power generation multiplexing |
| CN111009587B (en) * | 2019-11-25 | 2021-05-14 | 湖南红太阳新能源科技有限公司 | Photovoltaic module for atmospheric environment restoration and power generation multiplexing |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190716 Address after: 215614, Shuanglong Village, Fenghuang Town, Suzhou, Jiangsu, Zhangjiagang Patentee after: SUZHOU MATRIX OPTICAL CO., LTD. Address before: 215614 Building E of Phoenix Science Park, Fenghuang Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: Suzhou Qiangming Photoelectric Co., Ltd. |