CN201681948U - Secondary optical lens used in focusing solar cell - Google Patents
Secondary optical lens used in focusing solar cell Download PDFInfo
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- CN201681948U CN201681948U CN201020165578XU CN201020165578U CN201681948U CN 201681948 U CN201681948 U CN 201681948U CN 201020165578X U CN201020165578X U CN 201020165578XU CN 201020165578 U CN201020165578 U CN 201020165578U CN 201681948 U CN201681948 U CN 201681948U
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- optical lens
- secondary optical
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- solar battery
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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 utility model provides a secondary optical lens used in focusing solar cell, the secondary optical lens is used to converge light and couple the converged light into the solar cell chip, the secondary optical lens comprises a base body, which comprises a light receiving face and a light exit face, wherein the light receiving face is mainly composed of a convex arc face and a plane above the convex arc face, the light exit face is a plane, the plane above the convex arc face is paralleled with the light exciting face. The secondary optical lens is advantaged by increasing the converging energy of the light, enlarging the allowing incidence angle of the sunlight, improving the local overheating of the cell chip due to the light focusing non-uniformity, improving the photoelectricity transfer efficiency of the cell chip, and improving the stability of the cell chip work in a long term; also, the secondary optical lens enables more light to be converged to the surface of the cell chip, thereby improving the generating efficiency of the whole photoelectric system.
Description
Technical field
The utility model relates to a kind of optical lens, relates in particular to a kind of secondary optical lens that is used for the non-imaging of focusing solar battery.
Background technology
At present developed photoelectric conversion efficiency, but costing an arm and a leg of this chip in order to reduce the usable floor area of chip, improves the service efficiency of chip, needs to improve the optically focused multiplying power of sunlight up to the solar battery chip more than 30%.Under the situation of 500 times of optically focused, photoelectric conversion efficiency can reach more than 38% at present.For an ideal and practical solar power system, except solar battery chip with high-photoelectric transformation efficiency, also will there be high light gathering efficiency in this system, this is because the photoelectric conversion efficiency of solar power generation assembly is the photoelectric conversion efficiency of battery chip and the product of light gathering efficiency, therefore just must take the most effective optical design configurations and adopt optical element cheaply the convergence of sunlight.
In order to reduce cost, the optically focused multiplying power of general solar power system is at 500 times, 1000 times even higher.Because the sun moves, so sunlight tracking system must be installed to realize accurate aligning when high magnification optically focused.For guaranteeing accurate aligning, Focused Optical system will have the permission angle of incidence of sunlight of broad, and this point is very important.Add secondary optical lens and will enlarge the angle of the angle of incidence of sunlight of permission effectively, and produce following benefit: the alignment precision requirement when 1. having reduced assembled allows bigger error, for realizing that assembly automation creates conditions; More solar energy is delivered on the solar battery chip, has improved electromotive power output; 3. reduced required precision, thereby reduced system cost and energy consumption tracking system; 4. reduce because the shake of the sunlight focal point that airflow fluctuation causes makes power output more stable; 5. created condition for the solar power system of the higher optically focused multiplying power of design.
At present the secondary optical lens that adopts has two kinds, falls the glass optical prism and the inverted pyramid shape metallic mirror of trapezoidal column.Glass optical prism not only spotlight effect is bad but also cost is high, installs inconveniently, and the adopter is less.What extensively adopt is that inverted pyramid shape metallic mirror is done secondary optical lens, if but be as the criterion with light energy decline 10%, when focusing on 500 times of multiplying powers, the system of employing metallic mirror compares the incidence angle permissible variation with the system without any the secondary optics element has just increased by 0.1 degree, therefore be not clearly for the effect that improves the angle of incidence of sunlight that allows, be badly in need of the new secondary optical lens of exploitation to improve the angle of incidence of sunlight that allows; And if strict with nonimaging optics principle design lens, the secondary optical lens that obtains will be a curved surface in irregular shape, process very difficult.
The utility model content
The technical problems to be solved in the utility model is the shape by the appropriate design secondary optical lens, to solve the problem that present secondary optics element improves the angle of incidence of sunlight weak effect that allows, and it is inhomogeneous to cause the solar battery chip surface to be heated owing to focal beam spot is concentrated, thereby the problem that the photoelectric conversion efficiency of the solar battery chip that causes is poor, reliability is bad.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of secondary optical lens that is used for focusing solar battery, comprise matrix, above-mentioned matrix comprises sensitive surface and exiting surface, wherein: sensitive surface mainly is made of convex-shaped arc surface and the plane that is positioned at convex-shaped arc surface top, and exiting surface is the plane; The plane and the exiting surface of above-mentioned convex-shaped arc surface top are parallel to each other.
Adopt the beneficial effect that technique scheme produced to be: sensitive surface is designed to convex-shaped arc surface and plane structure combining, when the irradiate light of assembling through the prime lens is on secondary optical lens, planar section has less converging action to light, can obtain hot spot comparatively uniformly, can be radiated at the surface of solar battery chip more equably through hot spot behind the exiting surface, can reduce like this to concentrate and cause solar battery chip to be heated inhomogeneous and then reduce the problem of the photoelectric conversion efficiency of solar battery chip, and improve the battery chip long term operation stability because of light focusing; In addition, because the convex-shaped arc surface structure of sensitive surface has bigger converging action for sunlight, therefore sensitive surface is designed to the incidence angle that convex-shaped arc surface can effectively enlarge the sunlight of permission, so just increased the solar energy that to assemble, make the surface of more sunlight, thereby improved the generating efficiency of overall optical electric system to solar battery chip.Reduced required precision simultaneously, and then reduced energy consumption and system cost tracking system; Because sensitive surface adopts convex-shaped arc surface and plane structure combining, than big many of the area of exiting surface, therefore, sensitive surface can be accepted more sunlight, and when the sun moves, also can be to solar battery chip with sunlight, therefore, higher, the cumulative better effects if of effective optically focused multiplying power of this secondary optical lens.
Description of drawings
Fig. 1 is the structural representation of secondary optical lens embodiment one;
Fig. 2 is the vertical view of secondary optical lens structure shown in Figure 1;
Fig. 3 (a) is the structural representation of secondary optical lens embodiment two;
Fig. 3 (b) is the structural representation of secondary optical lens embodiment three;
Fig. 4 is the optically focused schematic diagram of the utility model secondary optical lens;
Fig. 5 (a) is the sunlight intensity distribution schematic diagram of assembling through the primary optical lens;
Fig. 5 (b) is a sunlight intensity distribution schematic diagram behind secondary optical lens;
Fig. 6 is no secondary optical lens, use the traditional secondary optical lens and use solar battery chip photoelectric conversion efficiency under three kinds of situations of secondary optical lens that the utility model provides and the incidence angle irrelevance of permission between relationship change figure;
Fig. 7 is that secondary optical lens of the present utility model is applied to the structural representation in the transmission-type focusing solar battery module;
Among the figure: the 1-secondary optical lens, the convex-shaped arc surface of 1-1-sensitive surface, the plane of 1-2-sensitive surface, the 1-3-exiting surface, first periphery on the 1-4 secondary optical lens, second periphery on the 1-5 secondary optical lens, the 2-solar battery chip, the 3-optical cement, 4-solar battery chip substrate, 5-Fresnel Lenses.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment one
Referring to Fig. 1 and Fig. 2, a kind of secondary optical lens 1 that is used for focusing solar battery comprises matrix, and above-mentioned matrix comprises the convex-shaped arc surface 1-1 part of sensitive surface, the plane 1-2 part and the exiting surface 1-3 of sensitive surface.Sensitive surface mainly is made of convex-shaped arc surface 1-1 and the plane 1-2 that is positioned at convex-shaped arc surface 1-1 top, and exiting surface 1-3 is the plane, and keeping parallelism between the plane 1-2 of sensitive surface and the exiting surface 1-3 makes the hot spot that converges on the solar battery chip more even.Convex-shaped arc surface 1-1 is preferably sphere, and sphere is convenient to processing, and production process is simple, is easy to industrial automation production.Convex-shaped arc surface 1-1 also can be the convex-shaped arc surface of other shapes, for example with parabolical one section convex-shaped arc surface that forms through rotation of the convex that intercepts or the convex-shaped arc surface that obtains through the convex line rotation of other shapes.
Embodiment two
Referring to Fig. 3 (a), a kind of secondary optical lens 1 that is used for focusing solar battery is also to comprise in the matrix one perpendicular to exiting surface 1-3 and and the first crossing periphery 1-4 of convex-shaped arc surface 1-1 of sensitive surface with the difference of embodiment one.The setting of the first periphery 1-4 makes the design of output facula shape become more flexible, for example, can be under all constant situation of sensitive surface (1-1,1-2) and exiting surface 1-3 size, change the distance between sensitive surface (1-1,1-2) and the exiting surface 1-3, perhaps can be under the constant situation of the distance between sensitive surface (1-1,1-2) and the exiting surface 1-3 curvature or the shape of convex-shaped arc surface 1-1 by changing sensitive surface reach different spotlight effect and output facula shapes.
Embodiment three
Referring to Fig. 3 (b), a kind of secondary optical lens 1 that is used for focusing solar battery is the second periphery 1-5 that comprises also in the matrix that a diameter is slightly big than the first periphery 1-4 with the difference of embodiment two.Such structural design can make things convenient for the installation of secondary optical lens 1.
The refractive index of secondary optical lens is the smaller the better among above-mentioned three embodiment, and the preferred refractive index of the utility model is less than 2.0.Refractive index is more little, and it is few more to reflex to airborne light through secondary optical lens, and the light energy that incides on the solar battery chip is big more.General glass or the quartz of adopting made, and can also make less than 2.0 high temperature resistant, anti-ultraviolet transparent material with other refractive indexes.
Carry out the analog computation of nonimaging optics from the light characteristic of primary optical lens, obtain the normally optical surface of a free shape of desirable secondary optical lens, this is very difficult for processing.For a good secondary optical lens, must have the following advantages: 1) increase the angle of incidence of sunlight degree that allows effectively; 2) assemble more luminous energy, make the hot spot of convergence shine the surface of solar battery chip more equably, this will improve the electric output characteristic of device and improve the reliability of long-term work; 3) be convenient to processing, thereby reduce cost; 4) easy for installation, be convenient to a large amount of productions.
The secondary optical lens that the utility model provides be the hypothesis from the primary optical lens inject only the symmetry, light intensity is radially successively decreased from the center, common this hypothesis is set up.Therefore the utility model adopts the material of low-refraction to make lens, is plane with plane 1-2 structure combining as sensitive surface, exiting surface 1-3 with convex-shaped arc surface 1-1 (preferred sphere), the sensitive surface area will be far longer than effective exiting surface 1-3 area (effectively exiting surface is generally the part of outgoing hot spot among the exiting surface 1-3) like this, thereby can increase effective optically focused multiplying power of system greatly.
Referring to Fig. 4, Fig. 5 (a) and Fig. 5 (b), as can be seen, use the secondary optical lens that the utility model provides can be to exiting surface, and make the light of convergence more even the convergence of rays of secondary optical lens edge scatter.
Referring to Fig. 6, the variation relation figure between the incidence angle irrelevance of relative photoelectric conversion efficiency and permission under the no secondary optical lens condition of curve A representative wherein, the variation relation figure between the incidence angle irrelevance of photoelectric conversion efficiency and permission is relatively used under the traditional secondary optical lens condition in curve B representative, and the variation relation figure between the incidence angle irrelevance of photoelectric conversion efficiency and permission is relatively used under the secondary optical lens condition that the utility model provides in the curve C representative.Wherein as can be seen from the figure: use the traditional secondary optical lens to compare with no secondary optical lens, very nearly the same to the convergent effect of light.Be as the criterion with light energy decline 10%, when focusing on 500 times of multiplying powers, the angle of incidence of sunlight irrelevance that allows during no secondary optics element is 0.1 degree, the system of employing metallic mirror compares the incidence angle permissible variation with the system without any secondary optical lens has increased by 0.1 degree, and this spotlight effect is not obvious.On the contrary, can when photoelectric conversion efficiency is identical, can increase the irrelevance of the angle of incidence of sunlight of permission behind the secondary optical lens that utilizes the utility model to provide greatly, rise to 1 degree.Owing to increased convergence scope, therefore improved utilance to luminous energy to light.
Use special high temperature resistant, uvioresistant optical cement to aim at the exiting surface of secondary optical lens and the sensitive surface of solar battery chip bonding, the refractive index of this optical cement and the refractive index of secondary optical lens are complementary, thereby make the photosensitive area that directly is coupled into solar battery chip from the light energy of secondary optical lens ejaculation.For light energy is utilized to greatest extent, thus the sensitive surface of the effective exiting surface of secondary optical lens and solar battery chip will be in size, be complementary in shape, avoid the waste of luminous energy.
Fig. 7 is that secondary optical lens 1 of the present utility model is applied to the package assembly schematic diagram on the solar cell, solar battery chip 2 is mounted on the solar battery chip substrate 4, with optical cement 3 with secondary optical lens 1 be fixed on solar battery chip 2 above.As can be seen from the figure sunlight incides on the Fresnel Lenses 5, converging action through it enters secondary optical lens 1, this Fresnel Lenses 5 can form with the PMMA plastics compacting of the high grade of transparency, ultraviolet light irradiation, also can the compacting of silicon-coating gel form on the ultra-clear glasses substrate.Sunlight through assembling for the first time is further meeting coalescence sensingization, homogenizing in secondary optical lens 1.Optical cement 3 is optical cements of refractive index and secondary optical lens 1 coupling good heat-resistance, and it is coupled into solar battery chip 2 with the light energy of secondary optical lens 1 output, and this optical cement 3 has reduced the interface loss in the energy transfer process effectively.Except solar battery chip 2 is installed, the lead-out wire or the leading-out terminal of bypass diode and electrode will be installed also on the solar battery chip substrate 4.The secondary optical lens 1 that the utility model provides can be applicable to the system of a focused transmission formula, also can be used in the energy-gathering system of a focus reflection formula.
The secondary optical lens that the utility model provides is specially adapted to the poor situation of first optical lens convergence characteristics, for example: the Fresnel Lenses that silicon-coating gel compacting forms on the ultra-clear glasses substrate is during as first optical lens, though this first optical lens has good environmental stability, but its convergence characteristics is poor, behind the secondary optical lens that use the utility model provides, the luminous power of output can greatly improve.
The utility model has adopted the sensitive surface of convex-shaped arc surface and plane combination, has avoided the complex surface structures of the free shape that obtained by general nonimaging optics precise design, is convenient to low-cost a large amount of production like this.
Claims (6)
1. a secondary optical lens that is used for focusing solar battery comprises matrix, and above-mentioned matrix comprises sensitive surface and exiting surface, it is characterized in that: sensitive surface mainly is made of convex-shaped arc surface and the plane that is positioned at convex-shaped arc surface top, and exiting surface is the plane; The plane and the exiting surface of convex-shaped arc surface top are parallel to each other.
2. the secondary optical lens that is used for focusing solar battery according to claim 1 is characterized in that above-mentioned convex-shaped arc surface is a sphere.
3. the secondary optical lens that is used for focusing solar battery according to claim 1 is characterized in that also comprising in the above-mentioned matrix one perpendicular to exiting surface and and first periphery of the convex-shaped arc surface bottom extremity of sensitive surface.
4. the secondary optical lens that is used for focusing solar battery according to claim 4 is characterized in that being provided with second periphery between first periphery and exiting surface, and the diameter of second periphery is greater than the diameter of first periphery.
5. the secondary optical lens that is used for focusing solar battery according to claim 1, the refractive index that it is characterized in that above-mentioned secondary optical lens is less than 2.0.
6. the secondary optical lens that is used for focusing solar battery according to claim 1 or 5 is characterized in that above-mentioned secondary optical lens made by glass or quartz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020165578XU CN201681948U (en) | 2010-04-22 | 2010-04-22 | Secondary optical lens used in focusing solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020165578XU CN201681948U (en) | 2010-04-22 | 2010-04-22 | Secondary optical lens used in focusing solar cell |
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| Publication Number | Publication Date |
|---|---|
| CN201681948U true CN201681948U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020165578XU Expired - Fee Related CN201681948U (en) | 2010-04-22 | 2010-04-22 | Secondary optical lens used in focusing solar cell |
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| CN (1) | CN201681948U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777334A (en) * | 2014-02-28 | 2014-05-07 | 上海师范大学 | Hemispheric compound eye natural light collecting device |
| JP2021010248A (en) * | 2019-07-02 | 2021-01-28 | 株式会社リュウテック | Sunlight collecting and diffusing panel |
-
2010
- 2010-04-22 CN CN201020165578XU patent/CN201681948U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777334A (en) * | 2014-02-28 | 2014-05-07 | 上海师范大学 | Hemispheric compound eye natural light collecting device |
| JP2021010248A (en) * | 2019-07-02 | 2021-01-28 | 株式会社リュウテック | Sunlight collecting and diffusing panel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20150422 |
|
| EXPY | Termination of patent right or utility model |