CN102738286A - Light collecting device - Google Patents
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- CN102738286A CN102738286A CN2011100898745A CN201110089874A CN102738286A CN 102738286 A CN102738286 A CN 102738286A CN 2011100898745 A CN2011100898745 A CN 2011100898745A CN 201110089874 A CN201110089874 A CN 201110089874A CN 102738286 A CN102738286 A CN 102738286A
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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
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- 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
- Y02E10/52—PV systems with concentrators
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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
The present invention relates to technical field of solar batteries.What especially, the present invention relates to solar module efficiently utilizes method.
Background technology
Solar cell is a kind of device that utilizes photovoltaic effect solar energy to be converted into electric energy.1954, the U.S. prepared the AT&T Labs modern first silicon solar cell based on PN junction, and photoelectric conversion efficiency has reached 6%.Through the development of over half a century, the technology of solar cell is among continuous progress and maturation, and commercial applications is based on the solar cell of silicon the most widely at present.Mainly comprise monocrystalline silicon battery; Polycrystal silicon cell and amorphous silicon battery; Early stage in the 1970's; Companies such as Sharp, Philip and solar electric power begin to prepare the commercial batteries module of small size, and progressively begin to be applied to ground, to 1980 mid-nineties 90s increasing company begin to put into the research and development and the manufacturing field of solar cell.
Arrived the early 21st century; Solar cell begins formally to receive the concern energetically of various countries as a kind of mode of efficiently utilizing of clean energy resource; The international market is for the rush of demand of solar cell, and China begins to occupy more and more important position in the manufacturing field of solar cell.Solar cell has been widely used in street lamp, building surface, roof, power station etc.The form of utilizing of present solar cell mainly is that a series of solar battery sheets are formed solar modules or claimed solar panel, can use separately according to the difference of power or forms array and use solar panel then.
The raw material of present widely used monocrystaline silicon solar cell sheet is a monocrystalline silicon piece, and it is at first through forming cylindric monocrystalline silicon pole in that reactors lira is brilliant, and section obtains then.A kind of more common situation is; The technology that the monocrystalline silicon silicon rod is cut into slices can take into account in order when forming battery component, to put more monocrystalline silicon battery sheet in the plane; Thereby four limits of the monocrystalline silicon piece of circle are all cut a part; Forming four angles has the accurate quadrangle of certain radian, perhaps can regard an approximate octagon as.When these monocrystalline silicon battery sheets were formed battery component, each monocrystalline silicon battery sector-meeting left a similar little tetragonal white space because of its octagonal shape in the centre of per four monocrystalline silicon battery sheets.Another kind of situation is that slice process can't cut four limits of circular single crystal silicon chip, but directly utilizes circular monocrystalline silicon battery sheet to form assembly, at this time also can leave the part white space between each circular single crystal silicon cell.This part white space is different according to the arrangement mode of circular batteries sheet, can be described as the imploded arcs quadrangle, imploded arcs triangle or some other shapes, and these concave arcs all are because the arc edge of circular silicon cell causes.Also having a kind of situation is between above-mentioned two kinds of situation, promptly is not that circular silicon chip is cut four limits, neither not cut, but cuts one side or a few limit, for example forms circle hat or semi-circular shape.When the monocrystalline silicon battery sheet of these shapes is formed battery component, equally also can leave a part of irregular white space between each monocrystalline silicon battery sheet.To sum up; These battery sheets are because of the circular characteristics of monocrystalline silicon battery sheet; Having carried out cutting does not in various degree perhaps cut; They are arranged the white space that all can leave a part between each monocrystalline silicon battery sheet of back, and this part white space has occupied certain illuminating area, has but wasted the sunlight that is radiated on these zones.After being assembled into solar module to solar battery sheet, what in fact need consider is that what of electric energy are the solar energy converting that receives in the shared area of entire cell assembly be.And do not see also that at present relevant technology pays close attention to the sunlight on the light area of above-mentioned part waste particularly and it is utilized.
Summary of the invention
The objective of the invention is characteristics to present monocrystalline silicon piece; Provide a kind of under the identical illuminating area through gathering the sunlight on the white space that is left between each monocrystalline silicon battery sheet and utilize, thereby realize improving the method for the photoelectric conversion efficiency of whole solar module.
To achieve these goals, the invention provides the light collection device that is used for the monocrystaline silicon solar cell assembly.It is characterized in that, can the sunlight on the white space between each monocrystalline silicon battery sheet be collected and outgoing to monocrystalline silicon battery sheet surface is used and is converted into electric energy.
Because can stay difform blank light area after the monocrystalline silicon battery sheet of cutting rearranges solar module by different way in various degree, above-mentioned light collection device can have different shapes according to these different white spaces.
Above-mentioned light collection device can be the device with light reflection function, can be the device with anaclasis function also, or has the device that has combined light reflection and anaclasis function.
Above-mentioned device with light reflection function is characterized in that mainly being made up of the structure with reflecting surface, can the light that be radiated at the white space top be reflexed to the surface of battery sheet.Light reflecting device can place on the white space.By the shape that the base constituted of reflecting surface and cell panel Plane intersects, can match with the shape that white space constitutes, also can be surrounded by the shape of white space less than the shape of white space slightly.
The reflecting surface of above-mentioned light reflecting device has following characteristic simultaneously:
(1) at first defines on the pattern curve that the base constituted of reflecting surface and cell panel Plane intersects any 1 O is arranged.In the cell panel plane, above-mentioned pattern curve has normal OA at an O place, and the OA direction is extended from an O toward white space, and the tangent line that O is ordered on normal OA and the pattern curve is vertical each other.Have normal OB to cross an O in addition and perpendicular to the cell panel plane, the OB direction is extended by the light positive face from an O toward the cell panel plane.The plane that is made up of normal OA and normal OB is called plane OAB.The reflecting surface of light reflecting device and plane OAB have intersecting lens OM, and in the OAB of plane, the tangent line of the last any time coordinate at point S of OM and normal OA or its reverse extending line have intersection point P, and form angle SPA and equal θ, and the size of θ can be spent between 90 degree 0 and change.(as shown in Figure 1)
(2) above-mentioned reflecting surface can be made up of various materials with good light reflection function.Mainly comprise one or more and alloy or compound in the metals such as silver, aluminium, stainless steel, titanium, nickel, cadmium, chromium, manganese, copper, zinc, germanium, tin, magnesium, gallium, gold, platinum, molybdenum, palladium, or be coated with the other materials such as glass, plastics, pottery, polymer of one or more and alloy or compound in the metals such as silver, aluminium, stainless steel, titanium, nickel, cadmium, chromium, manganese, copper, zinc, germanium, tin, magnesium, gallium, gold, platinum, molybdenum, palladium.
The characteristic that reflecting surface had according to above-mentioned light reflecting device; Can be shaped as triangle according to common white space; Quadrangle or polygon with and distortion (like one side or the polygon curve that becomes that will be wherein); Give an example out the respectively tetrahedron that is shaped as of light reflecting device, pyramid structure or polygon taper with and distortion (according to variation type of the being changed to tetrahedron on base, pyramid-like structure or type polygon taper etc.).
Above-mentioned device with anaclasis function is characterized in that and can the sunlight that be incident on the white space that is left between each monocrystalline silicon battery sheet be refracted to the silion cell surface.
Above-mentioned device with anaclasis function; It is characterized in that, utilize light transmissive material to form to have the structure of following characteristic: any 1 O is arranged on the pattern curve that the base constituted of this structure and cell panel Plane intersects, cross put O and with the perpendicular normal plane OAB of pattern curve; This structure is constructed as follows one or several the set in the shape that is described below in the intersecting lens of normal plane OAB: trapezoidal; Zigzag, multisided surface, triangle etc.
Above-mentioned light transmissive material is characterized in that, can use known prism, and lens etc. for example can use transparent materials such as glass, quartz, transparent polymer.
Advantage applies of the present invention following several aspect:
The first, the present invention through the light of wasting on the white space between each battery sheet is carried out collection and utilization, can increase substantially the conversion efficiency of whole solar panel according to the characteristics of monocrystalline silicon battery sheet.The second, the present invention is compared with existing commercial technology, under the condition of identical power output, can reduce the effective extinction area of solar battery sheet or solar energy, thereby reduce the cost of unit transfer power.The 3rd; Utilization of the present invention be the sunlight of blank parts between the battery sheet; The energy of this part light generally accounts for existing below 50% of light utilization; Therefore the utilization to this part light can not relate to the heat dissipation problem that temperature raises, and having overcome existing optically focused technology needs to increase the extra cost that radiating element brought, and adopts metal material to process the effect that the light collection device also has heat radiation.The 4th, the present invention does not influence the preparation technology of conventional battery plate fully, has thoroughly avoided other cell panel preparation technology to be changed the problems of bringing of deriving such as stability decreases.
Description of drawings
Fig. 1. have the light reflection function reflecting surface and white space pattern curve concern sketch map
Fig. 2 .a, the silicon cell arrangement sketch map (front view and oblique view) that has carried out the cuttings of four limits; B, circular silicon cell carry out the four directions and arrange sketch map (front view and oblique view); C, circular silicon cell carry out hexagonal Mi Dui and arrange sketch map (front view and oblique view); D, semicircle silicon cell arrange sketch map (front view and oblique view) (1, silicon cell, 2, white space)
Fig. 3. the silicon cell that has been used to carry out the cuttings of four limits is arranged the reflection unit sketch map of the white space that occurs.
Fig. 4. the cell panel surface of having carried out the silicon cell arrangement of four limits cuttings adds the reflection unit sketch map.(1, silicon cell, 3, reflection unit)
Fig. 5. be used for circular silicon cell and carry out the reflection unit sketch map that hexagonal Mi Dui arranges the white space that occurs.
Fig. 6. the cell panel surface that circular silicon cell carries out hexagonal Mi Dui arrangement adds the reflection unit sketch map.(1, silicon cell, 3, reflection unit)
Fig. 7. the cell panel surface that circular silicon cell carries out arranging in the four directions adds the reflection unit sketch map.(1, silicon cell, 3, reflection unit)
Fig. 8. be used for the reflection unit sketch map that semicircle silicon cell is arranged the white space that occurs.
Fig. 9. the cell panel surface that semicircle silicon cell is arranged adds the reflection unit sketch map.(1, silicon cell, 3, reflection unit)
Figure 10. the silicon cell that has been used to carry out the cuttings of four limits is arranged the refracting means sketch map of the white space that occurs.
Figure 11. the cell panel surface of having carried out the silicon cell arrangement of four limits cuttings adds the refracting means sketch map.(1, silicon cell, 4, refracting means)
Embodiment
Below, the preferred embodiment of the present invention is described.But the present invention is not limited in following embodiment.Any can deduction according to the analogy that preferred embodiment carries out is all within protection scope of the present invention.
Embodiment 1:
Described in background technology,, can leave a similar little tetragonal white space in the centre of per four monocrystalline silicon battery sheets because of its approximate octagonal shape for the monocrystalline silicon battery sheet that has carried out the cuttings of four limits.Shown in Fig. 2 a, to this situation, above-mentioned light collection device can adopt the device with light reflection function.The characteristic that reflecting surface had according to light reflecting device in the summary of the invention; The device of this light reflection function can be a series of similar pyramidal structures, and each pyramid structure bottom matches with the shape that the base constituted of cell panel Plane intersects little quadrangle proper and white space.Four faces of pyramid structure except the bottom surface are reflectings surface, and the light that shines on it is reflexed on the monocrystalline silicon battery sheet.The reflection unit of this pyramid structure is made up of the glass that the surface is coated with high reflecting metal silver, and argent outside oxygenates protective layer has good weather.Pyramid structure places in the little tetragonal white space between the silicon chip.As shown in Figure 3, any point O is constituted on the reflecting surface base plane OAB and reflecting surface have intersection OM, and the last any time coordinate at point S of OM can change between the 0-90 degree at the angle of tangent line in the OAB of plane and OA formation.Angle near 90 degree, explains that the height of this similar pyramid structure reflection unit is high more more; Angle near 0 degree, explains that the height of this similar pyramid structure reflection unit is low more more.
Need to prove, can infer naturally that for the non-fringe region of battery component, the centre of per four monocrystalline silicon battery sheets is stayed has plenty of a similar little tetragonal white space.For the fringe region of battery component four edges, can only form 1/2 tetragonal zone, the i.e. white space of an approximate isosceles triangle by two adjacent side by side monocrystalline silicon battery sheets.For the fringe region at four angles of battery component, have only respectively to form 1/4 tetragonal zone, the i.e. leg-of-mutton white space of approximate right angle on the angle of a monocrystalline silicon battery sheet.Therefore, the reflection unit of above-mentioned similar pyramid structure can be respectively the bottom surface and corresponding 1/2 pyramid of respective regions or the reflection unit of 1/4 pyramid structure at the four edges of battery component and the fringe region at four angles.Whole structure figure is as shown in Figure 4.
Embodiment 2:
Described in background technology,, can leave the part white space between each circular single crystal silicon cell for the assembly that directly utilizes the circular single crystal silicon cell to be formed.This part white space is different according to the arrangement mode of circular batteries sheet, can be described as imploded arcs quadrangle (shown in Fig. 2 b), imploded arcs triangle (shown in Fig. 2 c) or some other shapes.Present embodiment is that example designs the light collection device with the white space for the imploded arcs triangle.White space is imploded arcs quadrangle or some other shapes, can design similarly with identical method.The appearance of imploded arcs triangle white space is because the circular batteries sheet is arranged formed according to the close heap mode of hexagonal (cellular).To this situation, this light collection device can adopt the device with light reflection function.The characteristic that reflecting surface had according to light reflecting device in the summary of the invention; The device of this light reflection function can be that a series of bottoms are the leg-of-mutton similar tetrahedral structure of imploded arcs, and the shape that the base constituted of this structural base and cell panel Plane intersects imploded arcs triangle proper and white space matches.Three faces of this structure except the bottom surface are reflectings surface, and the light that can will shine on it reflexes on the monocrystalline silicon battery sheet.The plastics that the reflection unit of this structure posts high reflecting metal aluminium film by the surface constitute, and metallic aluminium outside oxygenates protective layer has good weather.This similar tetrahedral structure places in the leg-of-mutton white space of imploded arcs between the silicon chip.As shown in Figure 5, any point O is constituted on the reflecting surface base plane OAB and reflecting surface have intersection OM, and the last any time coordinate at point S of OM can change between the 0-90 degree at the angle of tangent line in the OAB of plane and OA formation.
Need to prove equally; Similar with embodiment 1; Can infer naturally, present embodiment is different for the non-fringe region and the formed white space of fringe region of battery component, and the reflection unit of fringe region can adopt with the same method of non-fringe region and make up.Whole structure figure is as shown in Figure 6.
For white space is the tetragonal situation of imploded arcs, and figure is as shown in Figure 7 for its whole structure.
Embodiment 3:
Described in background technology, the situation between embodiment 1 and embodiment 2 described situation promptly is not that circular silicon chip is cut four limits, neither not cut, but cuts one side or a few limit, for example forms circle hat or semi-circular shape.When the monocrystalline silicon battery sheet of these shapes is formed battery component, equally also can leave a part of irregular white space between each monocrystalline silicon battery sheet.Present embodiment is example with equidirectional being arranged side by side of semicircle battery sheet.Can leave a white space between per four semicircular battery sheets, this region shape spends circular arc by two 90 and straight line constitutes, and is referred to as isosceles imploded arcs triangle (shown in Fig. 2 d) here.To this situation, this light collection device can adopt the device with light reflection function.The characteristic that reflecting surface had according to light reflecting device in the summary of the invention; The device of this light reflection function can be that a series of bottoms are all the leg-of-mutton tetrahedral structure of isosceles imploded arcs, and the shape that the base constituted of this structural base and cell panel Plane intersects isosceles imploded arcs triangle proper and white space matches.Three faces of this structure except the bottom surface are reflectings surface, and the light that can will shine on it reflexes on the monocrystalline silicon battery sheet.The alloy that the reflection unit of this structure is scraped into the metallic aluminium of high reflectance by the surface constitutes, and metallic aluminium outside oxygenates protective layer has good weather.This similar tetrahedral structure places in the leg-of-mutton white space of isosceles imploded arcs between the silicon chip.As shown in Figure 8, any point O is constituted on the reflecting surface base plane OAB and reflecting surface have intersection OM, and the last any time coordinate at point S of OM can change between the 0-90 degree at the angle of tangent line in the OAB of plane and OA formation.
Need to prove equally; Similar with embodiment 1; Can infer naturally, present embodiment is different for the non-fringe region and the formed white space of fringe region of battery component, and the reflection unit of fringe region can adopt with the same method of non-fringe region and make up.Whole structure figure is as shown in Figure 9.
Embodiment 4:
Described in background technology,, can leave a similar little tetragonal white space in the centre of per four monocrystalline silicon battery sheets because of its approximate octagonal shape for the monocrystalline silicon battery sheet that has carried out the cuttings of four limits.Shown in Fig. 2 a,, the device with light reflection function of light collection device in adopting embodiment 1, also can adopt device with anaclasis function to this situation.Present embodiment describes with the device with anaclasis function.This structural material is made up of glass prism.The pattern curve that the base constituted of each structure and the cell panel Plane intersects little quadrangle of class proper and white space matches.Being shaped as that the normal plane OAB of any place and this structure intersecting lens constitute on this pattern curve is trapezoidal.Each structure is shown in figure 10, and there is a similar pyramidal depression centre that can be described as the quadrangular of little quadrangle formation approx.
Need to prove equally; Similar with embodiment 1; Can infer naturally, present embodiment is different for the non-fringe region and the formed white space of fringe region of battery component, and the refracting means of fringe region can adopt with the same method of non-fringe region and make up.Whole structure figure is shown in figure 11.
Claims (8)
1. light collection device that is used for the monocrystaline silicon solar cell assembly.It is characterized in that, can the sunlight on the white space except that each monocrystalline silicon battery sheet be collected and outgoing to monocrystalline silicon battery sheet surface is used and is converted into electric energy.
2. light collection device according to claim 1 is characterized in that, places the difference according to white space shape between the monocrystalline silicon battery sheet that various shape can be arranged.
3. according to right 1 and right 2 described light collection devices, it is characterized in that, can be the device with light reflection function, can be the device with anaclasis function also, or has the device that has combined light reflection and anaclasis function.
4. the device with light reflection function according to claim 3 is characterized in that, mainly is made up of the structure with reflecting surface, can the light that be radiated at the white space top be reflexed to the surface of battery sheet.By the shape that the base constituted of reflecting surface and cell panel Plane intersects, can match with the shape that white space constitutes, also can be surrounded by the shape of white space less than the shape of white space slightly.
5. according to claim 3 and 4 described devices with light reflection function, it is characterized in that the reflecting surface of light reflecting device has following characteristic simultaneously: at first defining on the pattern curve that the base constituted of reflecting surface and cell panel Plane intersects has any 1 O.In the cell panel plane, above-mentioned pattern curve has normal OA at an O place, and the OA direction is extended from an O toward white space, and the tangent line that O is ordered on normal OA and the pattern curve is vertical each other.Have normal OB to cross an O in addition and perpendicular to the cell panel plane, the OB direction is extended by the light positive face from an O toward the cell panel plane.The plane that is made up of normal OA and normal OB is called plane OAB.The reflecting surface of light reflecting device and plane OAB have intersecting lens OM, and in the OAB of plane, the tangent line of the last any time coordinate at point S of OM and normal OA or its reverse extending line have intersection point P, and form angle SPA and equal θ, and the size of θ can be spent between 90 degree 0 and change.
6. according to claim 3,4,5 described devices, it is characterized in that the reflecting surface of light reflecting device can be made up of various materials with good light reflection function with light reflection function.Mainly comprise one or more and alloy or compound in the metals such as silver, aluminium, stainless steel, titanium, nickel, cadmium, chromium, manganese, copper, zinc, germanium, tin, magnesium, gallium, gold, platinum, molybdenum, palladium, or be coated with the other materials such as glass, plastics, pottery, polymer of one or more and alloy or compound in the metals such as silver, aluminium, stainless steel, titanium, nickel, cadmium, chromium, manganese, copper, zinc, germanium, tin, magnesium, gallium, gold, platinum, molybdenum, palladium.
7. the device with refract light function according to claim 3; It is characterized in that, utilize light transmissive material to form to have the structure of following characteristic: any 1 O is arranged on the pattern curve that the base constituted of this structure and cell panel Plane intersects, cross put O and with the perpendicular normal plane OAB of pattern curve; This structure is constructed as follows one or several the set in the shape that is described below in the intersecting lens of normal plane OAB: trapezoidal; Zigzag, multisided surface, triangle etc.
8. light transmissive material according to claim 7 is characterized in that, can use known prism, and lens etc. for example can use transparent materials such as glass, quartz, transparent polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100898745A CN102738286A (en) | 2011-04-11 | 2011-04-11 | Light collecting device |
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| CN2011100898745A CN102738286A (en) | 2011-04-11 | 2011-04-11 | Light collecting device |
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| CN102738286A true CN102738286A (en) | 2012-10-17 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009063822A1 (en) * | 2007-11-14 | 2009-05-22 | Keisuke Mizokami | Decorative instrument and sunlight receiving module |
| WO2009144715A2 (en) * | 2008-05-26 | 2009-12-03 | Impel Microchip Ltd. | A monolithic low concentration photovoltaic panel based on polymer embedded photovoltaic cells and crossed compound parabolic concentrators |
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2011
- 2011-04-11 CN CN2011100898745A patent/CN102738286A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009063822A1 (en) * | 2007-11-14 | 2009-05-22 | Keisuke Mizokami | Decorative instrument and sunlight receiving module |
| WO2009144715A2 (en) * | 2008-05-26 | 2009-12-03 | Impel Microchip Ltd. | A monolithic low concentration photovoltaic panel based on polymer embedded photovoltaic cells and crossed compound parabolic concentrators |
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Application publication date: 20121017 |