KR101437909B1 - Secondary optical element having facility protecting carrier and concentrating photovoltaic module including the same - Google Patents

Secondary optical element having facility protecting carrier and concentrating photovoltaic module including the same Download PDF

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Publication number
KR101437909B1
KR101437909B1 KR1020120120219A KR20120120219A KR101437909B1 KR 101437909 B1 KR101437909 B1 KR 101437909B1 KR 1020120120219 A KR1020120120219 A KR 1020120120219A KR 20120120219 A KR20120120219 A KR 20120120219A KR 101437909 B1 KR101437909 B1 KR 101437909B1
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South Korea
Prior art keywords
light
optical component
incident
carrier
solar cell
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KR1020120120219A
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Korean (ko)
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KR20140056523A (en
Inventor
김성빈
김장균
김병욱
박찬규
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(주)애니캐스팅
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Priority to KR1020120120219A priority Critical patent/KR101437909B1/en
Priority to PCT/KR2012/008926 priority patent/WO2014069678A1/en
Publication of KR20140056523A publication Critical patent/KR20140056523A/en
Application granted granted Critical
Publication of KR101437909B1 publication Critical patent/KR101437909B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0543—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the refractive type, e.g. lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20—Optical components
    • H02S40/22—Light-reflecting or light-concentrating means
    • 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
    • Y02E10/52—PV systems with concentrators

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

 The present invention relates to a secondary optical component having a carrier protection function and a light-converging solar cell module having the secondary optical component. More specifically, the present invention provides a secondary light component having a carrier protection function, A secondary optical component capable of preventing the carrier (or receiver) from being damaged by off-axis light in the primary optical component while at the same time collecting the secondary light by the battery, and a light- To a solar cell module.

Description

TECHNICAL FIELD [0001] The present invention relates to a secondary optical component having a carrier protection function and a light collecting type solar cell module having the same. [0002]

The present invention relates to a secondary optical component having a carrier protection function and a light-converging solar cell module having the secondary optical component. More specifically, the present invention provides a secondary light component having a carrier protection function, A secondary optical component capable of preventing the carrier (or receiver) from being damaged by off-axis light in the primary optical component while at the same time collecting the secondary light by the battery, and a light- To a solar cell module.

Recently, photovoltaic (PV) devices using solar light have been widely used. In particular, photovoltaic devices using silicon solar cells are mainly used.

However, due to the breakthrough of high efficiency III-V compound semiconductor solar cell (multi-junction solar cell), it has been concluded that a multi-junction solar cell uses a low-cost condensing device to concentrate solar light (Concetrating Photovoltaic, CPV) devices have been actively studied.

Multi-junction solar cells have a higher energy conversion efficiency than silicon solar cells. In general, multi-junction solar cells have more than 35% energy efficiency, while silicon solar cells have about 20% efficiency Respectively. Particularly under concentration, some multi-junction solar cells currently have an energy efficiency of more than 40%.

The light-gathering type solar cell module using the multi-junction solar cell includes a solar cell, a primary lens that primarily condenses sunlight, a secondary lens that primarily condenses the light condensed from the primary lens, And the solar cell is mounted on a carrier or receiver of a circuit board or the like.

However, since the efficiency and the service life of the multi-junction solar cell used in the light-condensing solar cell module are very weak to moisture, it is necessary to seal the solar cell in order to improve the efficiency and prolong the life of the solar cell. Conventionally, when a multi-junction solar cell is mounted on a cell mount or a receiver, a method of sealing and sealing the silicon has been used. However, sealing and sealing the solar cell with silicon has a problem in that heat generated from the solar cell is dissipated by condensation due to the low thermal conductivity of the silicon material, and this problem causes a decrease in the efficiency of the solar cell . In addition, silicon has a problem that the efficiency of incident solar light is significantly reduced when exposed to ultraviolet rays of sunlight for a long period of time, thereby reducing the amount of light transmitted to the solar cell, thereby reducing the efficiency of the solar cell generator.

In order to solve such a problem, the conventional condensing type solar cell module may further include a receiver housing for covering and sealing the receiver provided with the solar cell. If the structure for sealing the solar cell is further provided, And the manufacturing process becomes complicated.

On the other hand, the light-convergence type solar cell module is formed by arranging a plurality of solar cells in an array form in a support frame, and requires a tracking device for maintaining the module orthogonal to the sun in order to improve the efficiency of the solar cell. Therefore, the design of such a light-condensing solar cell module maintains a state orthogonal to the sun, and under the condition that sunlight is incident on the primary lens with a vertical state, sunlight vertically incident on the primary lens is incident on the sun through the secondary lens The sunlight not vertically incident on the primary lens exists due to various causes such as a manufacturing error of the module and an error of the tracking device. Such solar light is not condensed by the solar cell, Thereby causing a problem that the components are damaged.

SUMMARY OF THE INVENTION The present invention has been accomplished to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a solar cell in which a carrier is hermetically sealed on a carrier and light condensed in a primary optical component is secondarily collected by a solar cell, The present invention provides a secondary optical component capable of preventing damage to components, particularly carriers (or receivers), caused by off-axis light, and a light-collecting solar cell module having the secondary optical component.

Further, the present invention provides a light-collecting type solar cell module that can easily combine a secondary optical component having a carrier protection function with a module that has a stiffness but is easy to manufacture and assemble.

The secondary optical component having the carrier protection function according to the present invention is characterized in that the primary optical component is a condenser that secondarily condenses the condensed light to a solar cell provided with a carrier, CLAIMS 1. A secondary optical element for a solar cell module, comprising: a cover part covering and sealing the carrier; A secondary lens unit that extends downward from the central portion of the cover portion and is condensed by the primary optical component and is incident on the central portion of the cover portion to collectively focus the light incident on the solar cell by total internal reflection; And an inner surface that reflects or totally reflects light directly incident on the primary optical component to prevent light incident on the cover portion from being incident on the secondary lens portion from being incident on the carrier, Lt; / RTI >

Further, a light-condensing type solar cell module according to the present invention includes a frame; A carrier having a solar cell; A primary optical element provided on the frame for primarily focusing the incident light; And a second optical component disposed on the carrier to seal the carrier and to focus the light condensed in the first optical component with the solar cell and to cause the condensed light in the first optical component to enter the carrier And a secondary optical component for preventing the secondary optical component.

Here, the secondary optical component may include: a cover portion that covers and seals the carrier; A secondary lens unit that extends downward from the central portion of the cover portion and is condensed by the primary optical component and is incident on the central portion of the cover portion to collectively focus the light incident on the solar cell by total internal reflection; And an inner surface that reflects or totally reflects light directly incident on the primary optical component to prevent light incident on the cover portion from being incident on the secondary lens portion from being incident on the carrier, Lt; / RTI >

According to the secondary optical component and the light-collecting solar module according to the present invention having the above-described configuration, it is not necessary to separately configure a carrier (or a receiver) to seal the module. Therefore, .

In addition, according to the secondary optical component and the light-collecting solar cell module according to the present invention, off-axis light in the primary optical component is condensed on various components of the module without being focused on the solar cell It is possible to prevent the damage of the generated parts, and in particular, to prevent the carrier (or the receiver) from being damaged.

Further, according to the light collecting type solar cell module according to the present invention, it is possible to easily combine a secondary optical component having a carrier protection function with a module which has a stiffness but is easy to manufacture and assemble .

FIG. 1 is a perspective view illustrating a light collecting type solar cell module according to an embodiment of the present invention,
FIG. 2 is a vertical cross-sectional view of the condensing type solar cell module in FIG. 1,
3 is a vertical cross-sectional view of the condensing type solar cell module according to FIG. 1,
FIG. 4 is a view schematically showing a state where carriers are arranged on a lower plate of a light-converging type solar cell module according to an embodiment of the present invention,
5 is an enlarged view of a portion 'A' in FIG. 2,
FIG. 6 is an enlarged view of a portion 'B' in FIG. 2,
7 is a perspective view showing a wire cover according to an embodiment of the present invention,
8 is a perspective view showing a carrier frame according to an embodiment of the present invention,
9 is a cross-sectional view of a secondary optical component according to an embodiment of the present invention,
Fig. 10 is a view for explaining Conditions 1 and 2,
11 is a cross-sectional view of a secondary optical component according to another embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

Also, in the accompanying drawings, thickness and size are exaggerated for clarity of description, and thus the present invention is not limited by the relative size or thickness shown in the attached drawings.

Meanwhile, in this specification, relative terms such as 'vertical direction' and 'horizontal direction' can be used to describe the relationship between the structures on the basis of the directions shown in the drawings, and the present invention is not limited to such terms.

The present invention relates to a secondary optical component having a carrier protection function and a light-collecting solar cell module having the secondary optical component. The secondary optical component according to the present invention is provided on the carrier to seal the carrier, And has a carrier protection function for primarily focusing the condensed light in the element with the solar cell and preventing the carrier (or receiver) from being damaged by off-axis light in the primary optical component.

FIG. 1 is a perspective view showing a light collecting type solar cell module according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a light collecting type solar cell module according to FIG. 1, Type solar cell module according to the present invention.

1 to 3, a light collecting type solar cell module 10 according to an embodiment of the present invention includes a frame including a side plate and a lower plate 30, and a solar cell 11 A carrier 12 provided at a predetermined interval above the lower plate 30, a primary optical component provided on the upper part of the frame for primarily focusing incident sunlight on the solar cell 11, Optical element 20 which is provided between the primary optical component 20 and the solar cell 11 so that the light condensed in the primary optical component 20 is condensed by the solar cell 11 And a secondary optical element (SOE) 100, which is provided with a second optical element.

The frame is elongated in the longitudinal direction (or longitudinal direction) and is provided to have a stiffness by itself. The frame may be formed as a side plate and a lower plate 30 and opened upward.

The side plates may be composed of a transverse plate 25 which is short in the transverse direction and a longitudinal plate 50 which is longer than the transverse plate 25 in the transverse direction. For example, the length L1 of the vertical plate 50 may be approximately 5 to 10 times longer than the length L2 of the horizontal plate 25, and the height H of the vertical plate 50 may be a length And may be about 1/20 to 1/10 times longer than the length L1. The vertical plate 50, the horizontal plate 25, and the lower plate, which form the frame, are preferably made of an aluminum material having a lightweight, self-rigidity and excellent thermal conductivity.

The secondary optical component 20 is provided on the upper part of the frame and is configured to condense incident sunlight to the solar cell 11 and may be configured in the form of a lens plate as shown in the figure, A plurality of pattern units 22 for collecting incident solar light into each of a plurality of solar cells 11 may be provided and the pattern unit 22 may be provided in the form of a Fresnel lens.

The light-condensing type solar cell module 10 according to the present invention includes a carrier frame 60 provided on a lower plate 30 and having a plurality of carriers 12 arranged at predetermined intervals thereon, A wire 13 connected in series, and a wire cover 70 covering the wire 13.

A high efficiency III-V compound semiconductor multi-junction solar cell may be used as the solar cell 11 to convert solar energy into electric energy. The carrier 12 may include other components And may be a receiver commonly used in the art to which the present invention belongs. That is, in the present invention, the carrier 12 has a configuration in which the solar cell 11 is provided on a circuit board, and the embodiments can be configured in various forms and used as terms covering the receiver. A plurality of the carriers 12 are provided at predetermined intervals in the lower plate 30 and the carrier 12 is provided with a connector and these connectors are electrically connected in parallel or in series by wires 13 , The plurality of carriers 12 may be connected to each other.

A plurality of ribs may be formed on the vertical plate 50, which is long in the longitudinal direction so as to have a stiffness by itself, in order to improve the rigidity of the frame. At least one of the reflective ribs 51 and the reflective ribs 52 may be included.

The heat dissipating ribs 51 are protruded from the outer surface of the vertical plate 50 to improve the rigidity of the vertical plate 50 and to increase the contact area with the outer surface of the vertical plate 50, The heat transferred is smoothly discharged to the outside.

The reflective ribs 52 are formed protruding below the inner surface of the vertical plate 50 to improve the rigidity of the vertical plate 50 and to provide a light shielding structure for the off- The light S1 is reflected so as not to be incident on the component such as the electric wire 13. [ The off-axis sunlight S1 is not vertically incident on the primary optical component 20 due to various reasons such as manufacturing error of the module 10, error of the tracking device, And the reflection rib 71 is for preventing the wire 13 from being damaged by the off-axis solar light S1 together with the wire cover 70. [

It is preferable that the vertical plate 50 is integrally formed by extrusion molding, in which the heat dissipating ribs 51 and the reflective ribs 52 are elongated in a longitudinal direction with a certain cross section. Then, the vertical plate 50 having the above-mentioned cross section can be integrally manufactured by extrusion molding, and the frame can be assembled, so that the manufacture and assembly can be easily performed.

A coupling rib 26 for screwing the vertical plate 50 may be formed on the inner or outer side of the horizontal plate 25 and the coupling rib 26 may improve the rigidity of the horizontal plate 25. [ And facilitates the screwing with the vertical plate (50). Preferably, the engaging ribs 26 may be elongated transversely to a predetermined vertical cross-section so that the transverse plate 25 can be integrally formed by extrusion molding.

The lower plate 30 may be composed of a plurality of piece lower plates 31 having a predetermined width in the longitudinal direction and arranged in the longitudinal direction to couple with each other, And may have a length corresponding to the length of the transverse plate 25.

The engaging rib 34 is formed in the engraved bottom plate 31 to have a heat radiating rib 32 protruding downward and a fastening portion 33 protruding from the upper portion to be screwed with the vertical plate 50 .

The rigidity can be improved by the heat dissipating rib 32 and the engaging rib 34 and the area of contact with the outside by the heat dissipating rib 32 is widened so as to be generated inside the enclosed frame The heat transferred to the engraved lower plate 31 can be smoothly discharged to the outside and discharged. The fastening portion 33 can be easily formed on the engraved lower plate 31 made of a thin plate material by forming the fastening portion 33 for screwing the vertical plate 50 on the engaging rib 34.

The secondary optical component 100 is provided on the carrier 12 to seal the carrier 12 and to condense the light condensed in the primary optical component 20 to the solar cell 11 in a secondary While at the same time protecting the carrier 12 from damage to the carrier 12 by off-axis light in the primary optical component 20. Therefore, the module 10 according to the present invention does not need to include a separate structure for sealing the solar cell 11 and the carrier 12, so that the overall configuration can be simplified. A detailed description of the secondary optical component 10 according to the present invention will be described later.

FIG. 4 is a view schematically showing a state in which carriers are arranged on a lower plate of a light-converging type solar cell module according to an embodiment of the present invention.

4, the carrier 12 includes a lateral array 122 in which a plurality of carriers 12 are arranged at predetermined intervals in the lateral direction, a plurality of longitudinal arrays 122 arranged in a longitudinal direction Arrays 124, which are connected to each other by wires 13.

For example, the plurality of carriers 12 forming the transverse array 122 may be connected by transverse transverse wires 132, and the transverse transverse arrays 124 may be connected by any one transverse transverse Can be connected by a vertical connecting wire 132 connecting the carrier 12 located at the end of the direction array 122 and the carrier 12 located at the end of the other one of the adjacent transverse arrays 122 adjacent to each other. In this case, since the transversely connecting wire 132 can be protected by the wire cover 70, the vertically connecting wire 132 is located at one end of the module 10, The module 10 according to the present invention includes a reflective rib 71 protruding from the bottom of the inner surface of the vertical plate 50 Thereby enhancing the rigidity of the vertical plate 50 and protecting the vertical connecting wires 132. [0031] As shown in FIG.

FIG. 5 is an enlarged view of a portion A of FIG. 2, FIG. 6 is an enlarged view of a portion B of FIG. 2, FIG. 7 is a perspective view showing a wire cover according to an embodiment of the present invention, 1 is a perspective view showing a carrier frame according to an embodiment of the present invention.

5 to 8, the carrier frame 60 can be engaged and fixed to the upper portion of the lower plate 25 by the wire cover 70.

The carrier frame 60 is preferably made of an aluminum material which is light and has a high rigidity and is excellent in thermal conductivity as in the case of the lower plate 30 in order to dissipate heat generated in the solar cell 11 effectively. A separate structure is required for fixing the carrier frame 60 to the upper portion of the lower plate 30 when the frame 60 is made of the same metal material as the lower plate 30. [ However, when the carrier frame 60 is fixedly coupled to the upper portion of the lower plate 30 by using a separate screw or the like, the structure of the carrier frame 60 becomes complicated and the assembling process becomes complicated.

The module 10 according to the present invention can be provided so as to fix the carrier frame 60 together when the wire cover 70 for protecting the wire 13 is joined to the upper part of the lower plate 30 . That is, the wire cover 70 is provided on the lower plate 30 so as to cover the wire 13, and can be coupled to the lower plate 30 with the carrier frame 60 fixed.

Specifically, the wire cover 70 includes an upper plate 72 covering the wire 13 and a lower plate 72 extending downward from one side of the upper plate 72 (for example, the end of the upper plate 72) (For example, a predetermined distance inward from the end of the upper plate 72) of the upper plate 72 so as to be positioned inside the first leg portion 74, And a second leg portion 76 extending downward from the first leg portion 76 and the second leg portion 76.

The second leg portion 76 is provided to press the carrier frame 60 when the first leg portion 74 is coupled to the lower plate 30. For example, The length of the first leg portion 74 may be shorter than the length of the first leg portion 74 to press the carrier frame 60 when the first leg portion 74 is engaged with the lower plate 30. [ Preferably, the second leg portion 76 may be formed to be inclined at a predetermined angle so as to have a predetermined elastic force in the direction of pressing the carrier frame 60, and more preferably, the second leg portion 76 And the pair of second legs 76 may be formed to extend in a downward direction. The second leg portion 76 has a stronger elastic force in the direction of pressing the carrier frame 60 so that the first leg portion 74 is more firmly fixed to the carrier frame 60 when the first leg portion 74 is engaged with the lower plate 30. [ 60 can be fixed. An end portion 77 having a round cross section may be formed at the end of the second leg portion 76 to smoothly press the carrier frame 60 thereon.

The lower plate 30 may be composed of a plurality of engraved lower plates 31 arranged in the longitudinal direction as described above and a seat portion 60 on which the carrier frame 60 is seated 36 may be elongated in the longitudinal direction and an engaging projection 38 may be formed to protrude from the outer side of the seating portion 36 to engage with the wire cover 70.

The carrier frame 60 may be elongated in the transverse direction so as to be seated on the seating part 36 formed in the long side in the transverse direction and a plurality of carriers 12 arranged in the transverse direction on the carrier frame 60, At least two carriers 12 may be provided. The carrier 12 may be attached to the carrier frame 60 by a sealing material such as silicone while the solar cell 11 is provided on the top.

The engaging projection 39 may be formed at an end of the engaging projection 38. The engaging projection 39 may be formed at one side of the first leg portion 74 of the wire cover 70 The engaging portion 75 may be formed to be engaged with the engaging protrusion 39. As shown in Fig.

The upper plate 72 of the wire cover 70 covers and protects the wires 13 (for example, the transversely connecting wires 132) connecting the plurality of carriers 12 arranged at predetermined intervals in the transverse direction And the wire cover 70 is engaged with the engaging lower plate 31 by engaging the engaging portion 75 of the first leg portion 74 with the engaging jaw 39 and the second leg portion 76 And the carrier frame 60 is pressed when the engaging portion 75 is engaged with the engaging jaw 39. [

Meanwhile, the carrier frame 60 may include a heat pipe 62 provided therein. The heat pipe 62 may have a closed loop shape, and the refrigerant may be accommodated in the heat pipe 62. The evaporator where the refrigerant evaporates due to the heat generated in the solar cell 11 and the evaporated refrigerant condense A detailed configuration of the heat pipe 62 can be easily implemented by those skilled in the art, so a detailed description thereof will be omitted, The present invention is not limited to the specific configuration of the heat pipe 62. [

In addition, the carrier frame 60 is long in the longitudinal direction, and the receiving grooves 64 may be formed long in the longitudinal direction so that a plurality of the carriers 12 may be arranged in a row at a predetermined interval.

Therefore, since the module 10 according to the present invention requires only the carrier frame 60 to be fixed by using the wire cover 70 without fixing the plurality of the carriers 12 separately, the whole assembly is very simple and easy have. By providing the heat pipe 62 for dissipating the heat generated in the solar cell 11 inside the carrier frame 60, it is not necessary to separately provide a device for dissipating heat, The heat pipe 62 for dissipating heat generated in the module 10 can be easily assembled and integrated into the module 10.

The wire cover 70 is preferably provided to fix the secondary optical component 100 when the wire cover 70 is coupled to the lower plate 30. To this end, Further includes a third leg portion 78 extending downwardly from one side of the second optical component 100 to press the flange 115 of the secondary optical component 100 when the first leg portion 74 is coupled to the lower plate 30 . The third leg portion 78 is configured to press the flange 115 of the secondary optical component 100 in the case where the latch portion 75 of the first leg portion 74 is caught by the latching jaw 39 And may be formed shorter than the first leg portion 74 and / or the second leg portion 76.

It is preferable that the engraved lower plate 31 is integrally formed by extrusion molding in the same manner as the transverse plate 25 and the longitudinal plate 50. For this purpose, the heat radiating rib 32, the engaging rib 34, And the engaging projections 38 are preferably long in a transverse direction with a certain cross section. Then, the piece lower plate 31 having the above-mentioned cross section is integrally manufactured by extrusion molding, and then the frame is assembled by cutting the required length, so that it is easy to manufacture and assemble.

Hereinafter, the secondary optical component 100 according to the present invention will be described in detail with reference to the drawings.

9 is a cross-sectional view illustrating a secondary optical component according to one embodiment of the present invention. Referring to FIG. 9, a secondary optical component 100 according to an exemplary embodiment of the present invention may include a cover 110, a secondary lens 120, and an inner surface 130.

The cover 110 covers and covers the carrier 12 so as to cover the carrier 12 (or the receiver) in which the solar cell 11 is mounted on the circuit board together with other components , And the bottom edge is sealed with the carrier 12 covered, thereby sealing the carrier 12.

A predetermined space 111 may be formed in the inside of the cover part 110, and the overall shape of the cover part 110 may be a substantially hemispherical shape. Of course, the overall shape of the cover 110 may be other than hemispherical, for example, the shape of the cross-section of the outer surface may be aspherical, but the present invention is not limited thereto.

The secondary lens unit 120 is formed by extending downward from the central part 112 of the cover part 110 and condensing the light S2 incident on the central part 112 of the cover part 110 by the primary optical component 20, Is secondarily collected by the solar cell 11 by total internal reflection. That is, the secondary lens unit 120 uniformly distributes the normally converged light S2 among the light condensed from the primary optical component 20 and incident on the cover unit 110 to the solar cell 11, And a function as a homogenizer is provided.

The secondary lens unit 120 includes an incident surface 121 corresponding to the center portion 112 of the cover portion 110 into which light condensed from the primary optical component 20 is incident, The light incident on the incident surface 121 and the light exiting surface 123 through which the light reflected from the side surface 122 is emitted may be provided on the side surface 122 where the light incident on the side surface 122 is totally reflected.

In addition, as shown in the drawing, the cross section of the secondary lens unit 120 is generally tapered from the top to the bottom. This is because the light condensed from the primary optical component 20 has a taper shape, The total number of times of total reflection on the side surface 122 of the secondary lens unit 120 is increased so that the solar cell 11 11 in order to uniformly distribute light incident thereon. However, the shape of the secondary lens unit 120 is not limited to a tapered shape, and the side surface 122 of the secondary lens unit 120 may have a shape of a straight line as well as a curve, The shape of the secondary lens unit 120 may be various shapes having a shape in which the width of the emission surface 123 is smaller than the width of the incident surface 121. [ In addition, the shape of the horizontal section of the secondary lens unit 120 may be a square, a triangle, a polygon or a circular shape, and the shape and / or shape of the cross section may be changed.

The inner side surface 130 is a part of the light incident on the cover 110 of the primary optical component 20 and the light S3 not incident on the secondary lens part 120 is incident on the carrier 110 .

The outer surface of the cover part 110 may be an incident surface on which the primary condensed light from the primary optical component 20 is incident, All of the light incident on the outer surface of the cover 110 is incident only on the central portion 112 of the cover 110. Almost all of the light condensed by the first optical component 20 passes through the second lens portion 120, ). However, in reality, there may be light that is not vertically incident on the primary optical component 20 due to various causes, such as manufacturing errors of the module 10, error of the tracking device, Off-axis light S3 is focused on the center portion 112 of the cover portion 110 in the off-axis state, that is, off- The incident light is directly incident on the carrier 12 located inside the cover 110 while being unable to be incident on the secondary lens unit 120 in step S4, Causing various parts of the carrier 12 to be damaged. However, in order to solve such a problem, in order to solve such a problem, the peripheral portion 113 except for the region of the central portion 112, which is incident on the outer surface of the cover portion 110 by the secondary lens portion 120, It is undesirable to increase the production cost and to complicate and complicate the manufacturing process. The secondary optical component 100 is preferably one-body molded from a transparent material, without additional processes such as a process for joining separate members or a coating process, considering the manufacturing cost and manufacturing process to be. Here, transparent materials such as glass, acrylic, methylmethacrylate, polymethylmethacrylate (PMMA), polycarbonate (PC), and polyethyleneterephthalate (PET), which are transparent materials having excellent light transmittance, can be used.

Accordingly, the secondary optical component 100 according to the present invention can be integrated into an off-axis (off-axis) optical system to solve the problem of off- And the inner side surface 130 is configured to reflect the reflected light S3. Here, the off-axis light S3 can be defined as light that is not normally converged and that is directly incident on the inner surface 130 because it can not enter the second lens unit 120. [ For example, the off-axis light S3 can be incident on the peripheral portion 113 without being incident on the central portion 112 of the cover portion 110, Even if it is incident on the center portion 112 of the cover portion 110, the incident angle? Formed between the optical axis 101 and the optical axis 101 is too large to be incident on the second lens portion 120, It is possible to be a light.

The inner surface 130 of the secondary optical component 100 is thus reflected by the primary optical component 20 so as to reflect directly incident light S3 of the light incident on the outer surface of the cover portion 110 Or total reflection. The inner side surface 130 may be provided to reflect light incident directly by a method such as coating or the like, but it is optically designed to satisfy the following condition 1 and totally reflect incident light S3 directly. .

Condition 1: Δα> sin -1 (1 / n) + sin -1 (sin θ 1 / n)

? 1 : the angle of incidence? Of the light that is condensed in the primary optical component 20 and enters the cover portion 110;? 1 : a tangent of the tangent at an arbitrary point P1 on the inner surface 130; Is defined as an angle formed with the imaginary reference axis 102 parallel to the optical axis 101 of the secondary optical component 100. The light S3 directly incident on the inner surface 130 is incident on the cover 110, N: the refractive index of the material forming the secondary optical component 100)

Generally, in consideration of the error of the sunlight, the manufacturing error of the module 10, the error of the tracking device, etc., when the module 10 is designed, off-axis light S3 The total reflection condition of the inner side surface 130 can be determined by the angle of incidence of the light S3 that directly enters the off-axis light, that is, the inner side surface 130 ? 1 ), the optical design of the inner surface 130 can be made possible. The condition 1 will be described later in detail.

The secondary optical component 100 according to an exemplary embodiment of the present invention further includes an exit surface 140 for emitting the light S5 reflected or totally reflected from the inner surface 130 to the outside of the cover 120 .

As shown in the drawing, even if the off-axis light S3 is reflected or totally reflected by the inner surface 130, the cover portion 110 is reflected or totally reflected from the outer surface of the cover portion 110, (S6), which causes damage to various parts provided on the carrier 120. [0064]

Accordingly, the secondary optical component 100 according to the embodiment of the present invention is configured such that the light S5 reflected or totally reflected by the inner side surface 130 can be reliably emitted to the outside of the cover portion 110, And the surface 140 is constituted. The exit surface 140 may be optically designed to emit light S5 reflected or reflected from the inner surface 130 to the outside of the cover portion 110 so as to satisfy Condition 2 below.

Condition 2: ?? | 2 ?? ?? - sin -1 (1 / n) - sin -1 (sin? 1 / n)

(Where? Is the slope of the tangent line at an arbitrary point P2 on the exit surface 140;? 1 is the incident angle of the light S3 directly incident on the inner surface 130 to the cover 110, n: the refractive index of the material constituting the secondary optical component 100)

The optical design of the inner side surface 130 is possible according to the range of the off-axis light S3 as described above. Therefore, the optical design for the emission condition of the emission surface 140 is also possible . The condition 2 will be described later in detail.

The secondary optical component 100 according to an exemplary embodiment of the present invention may further include a flange 102 extending outwardly from an outermost portion of the cover 110. In this case, The car optical component 100 can be easily and firmly coupled to the module 10 by the third leg 78 of the wire cover 70 pressing the flange 115 as described above.

The secondary optical component 100 may further include a passage portion 114 through which a wire 13 for connecting a plurality of carriers 12 is passed to one side of the cover portion 110. The passage portion 114 may be provided in the form of a groove at the outermost edge of the cover portion 110 or may be provided in the form of a hole at a predetermined position of the cover portion 110. The passage portion 114 can be sealed by a sealing material such as silicone after the electric wire 13 is connected so that the space inside the cover portion 110, that is, the space 111 in which the carrier 12 is accommodated, .

The depth of the receiving groove 64 in which the carrier 12 provided in the upper part of the carrier frame 60 is accommodated may be equal to the thickness of the carrier 12 and the thickness of the solar cell 11 have. The secondary optical component 100 may be provided with the lower end 116 of the outermost portion of the cover 110 and the lower end of the secondary lens 120, So that the secondary optical component 100 can be easily manufactured.

The lower end 116 of the outermost portion of the cover 110 is a portion that is substantially in contact with the lower plate 30 and / or the receiver frame 60 and is sealed by the sealing material, The lower end 123 of the secondary lens unit 120 is provided on the carrier 12 provided on the receiver frame 60 and on the upper side of the carrier 12. [ The secondary optical component 100 can not be provided in a substantially horizontal state because it must be made shorter than the outermost portion lower end 116 of the cover portion 110 due to the thickness of the solar cell 11, The height of the lower end 116 of the outermost portion of the cover 110 and the height of the lower end 123 of the second lens 120 are made equal to each other, The lower end 123 of the secondary lens unit 120 is processed in a separate process, The. However, such a problem can be easily solved by providing the depth of the receiving groove 64 equal to the thickness of the carrier 12 and the thickness of the solar cell 11, as described above.

Hereinafter, Condition 1 and Condition 2 will be described in detail with reference to the drawings.

10 is a diagram for explaining Conditions 1 and 2.

10, when the refractive index of the material forming the secondary optical component 100 is n, the incident angle and the refraction angle of the light that is condensed in the primary optical component 20 and is incident on the cover portion 110, An incident angle at which the light S3 directly incident on the inner side surface 130 enters into the cover portion 110 is defined as an angle formed by the imaginary reference axis 102 parallel to the optical axis 101 of the element 100 θ 1, when the light (S3) is referred to the refraction angle of refraction 2 θ in the cover portion 110, satisfies the following expression.

sin? 1 = n? sin? 2

The inclination of the tangent line 103 at an arbitrary point P1 on the inner surface 130 is represented by DELTA alpha and the light S3 incident on the inner surface 130 is incident on the inner surface 130 at an incident angle [ T1 ) is defined as an angle formed by the normal line 104 with respect to the tangent line 103, the following equation is satisfied.

θ T1 = ?? -? 2

At this time, in order for the light S3 directly incident on the inner surface 130 to be totally reflected on the inner surface 130, the following condition must be satisfied.

n x sin? T1 > 1

Therefore, by summarizing the above conditions using the above equations, Condition 1 as described above can be obtained. That is, the condition 1 is an optical condition for totally reflecting the light S 3 directly incident on the inner surface 130. In addition, the shape of the inner surface 130 may be a curved line or a straight line, but the present invention is not limited thereto. For example, FIG. 10 shows an example in which the shape slope? Of the inner side surface 130 is not constant. As shown in FIG. 9, the inner side surface 130 includes an arbitrary point P1 Of the tangent line may be in the form of a constant slope.

On the other hand, the angle of incidence which the light (S5) the total reflection tilt in Δβ, the inner surface 130 of the tangent 105 at an arbitrary point (P2) on the emitting surface 140 is incident on the inclined surface 140 (θ T2) Is defined as an angle formed by the normal line 106 to the tangent line 105, the following equation is satisfied.

θ T2 = 2 x? -? -? 2

At this time, the following condition must be satisfied in order for the light S5 reflected by the inner surface 130 to be incident on the emitting surface 140 to be emitted from the emitting surface 140 to the outside of the covering portion 110.

n x sin &amp;thetas; T2 <1

Therefore, by summarizing the above conditions using the above equations, Condition 2 as described above can be obtained. That is, the condition 2 is an optical condition for causing the light exiting surface 140 to be totally reflected by the inner side surface 130 to emit the incoming light S5 to the outside of the cover portion 110. In addition, like the inner side surface 130, the shape of the emitting surface 140 may be curved or straight, and the present invention is not limited thereto. For example, FIG. 10 shows an example in which the shape slope? Of the exit surface 140 is not constant. As shown in FIG. 9, the exit surface 140 is an arbitrary point P2 on the exit surface 140 The slope? Of the tangent line at the tangential line?

11 is a cross-sectional view illustrating a secondary optical component according to another embodiment of the present invention.

11, the secondary optical component 150 according to the present embodiment has a convex shape in the central part 112 so that the central part 112 and the peripheral part 113 of the cover part 110 are clearly separated from each other in terms of structure, The peripheral portion 113 may be formed in a flat shape and the side surface of the cover portion 110 may be formed as an inclined surface having the same inclination as a whole so that the entire side surface can perform the function of the emitting surface 150, The inner surface 140 may also be formed of an inclined surface having the same overall inclination.

As described above, the present invention relates to a secondary optical component having a carrier protection function and a light-collecting solar cell module having the secondary optical component, and the embodiments can be modified in various forms. Accordingly, the present invention is not limited to the embodiments disclosed herein, and all changes which can be made by those skilled in the art are also within the scope of the present invention.

10: condensing type solar cell module 11: solar cell
12: carrier 13: wire
20: Primary optical component 25: Horizontal plate
30: lower plate 50: vertical plate
51: heat radiating rib 52: reflective rib
60: carrier frame 70: wire cover
100: secondary optical component 110: cover part
120: Second lens unit 130: Inside surface
140: exit surface

Claims (16)

A secondary optical element for a light-collecting type solar cell module that primarily collects the condensed light from a primary optical element with a solar cell provided on a carrier, In this case,
A cover portion covering the carrier;
A secondary lens unit that extends downward from the central portion of the cover portion and is condensed by the primary optical component and is incident on the central portion of the cover portion to collectively focus the light incident on the solar cell by total internal reflection; And
And an inner surface that reflects or totally reflects directly incident light so as to prevent light that is condensed by the primary optical component and that is not incident on the secondary lens portion from being incident on the carrier among light incident on the cover portion, A second optical component for a light-collecting type solar cell module. The method according to claim 1,
And the inner surface is configured to satisfy a condition 1 to totally direct the direct incident light.
Condition 1: Δα> sin -1 (1 / n) + sin -1 (sin θ 1 / n)
? 1 : an incident angle (?) Of the light that is condensed in the primary optical component and is incident on the cover portion, and the optical axis of the secondary optical component N is an index of refraction of the material constituting the secondary optical component, and n is an index of refraction of the material constituting the secondary optical component. 3. The method of claim 2,
Wherein the inner side surface is in the form of an inclined surface having a slope (?) Of tangent at an arbitrary point on the inner surface. The method according to claim 1,
And an exit surface for emitting the light reflected or totally reflected from the inner surface to the outside of the cover portion. 5. The method of claim 4,
And the exit surface is provided on an outer side edge portion of the cover portion. 5. The method of claim 4,
The inner side surface is configured to satisfy a condition 1 to totally direct the direct incident light and the exit surface is configured to satisfy the following condition 2 so that light totally reflected by the inner side surface is emitted to the outside of the cover part A second optical component for a light-collecting type solar cell module.
Condition 1: Δα> sin -1 (1 / n) + sin -1 (sin θ 1 / n)
Condition 2: ?? | 2 ?? ?? - sin -1 (1 / n) - sin -1 (sin? 1 / n)
? 1 : a tangent of a tangential line at an arbitrary point on the exit surface;? 1: a tangent of a tangent line at an arbitrary point on the inner surface;? 1 : N is an incident angle at which the direct incident light is incident on the cover portion when the incident angle of light is defined as an angle formed by an imaginary reference axis parallel to the optical axis of the secondary optical component, The refractive index of the material to be formed) The method according to claim 6,
Wherein the inner surface is formed in the shape of an inclined surface having a constant tilt angle DELTA alpha at an arbitrary point on the inner surface and the exit surface has an inclination angle DELTA beta at a certain point on the exit surface, And a second optical component for the light-collecting type solar cell module. The method according to claim 1,
Wherein the secondary optical component is one-body molded from a transparent material. delete A frame;
A carrier having a solar cell;
A primary optical element provided on the frame for primarily focusing the incident light; And
And a secondary optical component provided on the carrier and secondarily condensing the light condensed by the primary optical component with the solar cell,
The secondary optical component comprises:
A cover portion covering the carrier;
A secondary lens unit that extends downward from the central portion of the cover portion and is condensed by the primary optical component and is incident on the central portion of the cover portion to collectively focus the light incident on the solar cell by total internal reflection; And
And an inner surface that reflects or totally reflects directly incident light so as to prevent light that is condensed by the primary optical component and that is not incident on the secondary lens portion from being incident on the carrier among light incident on the cover portion, And a light source for emitting light. 11. The method of claim 10,
And an exit surface for emitting the light reflected or totally reflected from the inner surface to the outside of the cover portion. A frame comprising a side plate and a lower plate;
A carrier having a solar cell;
A primary optical element provided on the frame for primarily focusing the incident light;
And a second optical component disposed on the carrier for secondarily focusing light collected by the first optical component with the solar cell, wherein off-axis light from the first optical component is incident on the carrier A secondary optical component to prevent interference with the optical system;
A carrier frame provided on the lower plate and having a plurality of the carriers at a predetermined interval thereon;
A wire connecting the carrier; And
And a wire cover provided on the lower plate so as to cover the electric wire and coupled to the lower plate while fixing the carrier frame. 13. The method of claim 12,
The secondary optical component is provided with a flange extending outwardly in the outermost portion,
Wherein the wire cover is provided with a third leg portion for pressing a flange of the secondary optical component when the wire cover is coupled to the lower plate. 13. The method of claim 12,
And a passage portion through which the electric wire passes is provided on one side of the secondary optical component. 11. The method of claim 10,
Wherein the direct incident light is off-axis light in the primary optical component. 13. The method according to claim 10 or 12,
Wherein the secondary optical component is one-body molded from a transparent material.
KR1020120120219A 2012-10-29 2012-10-29 Secondary optical element having facility protecting carrier and concentrating photovoltaic module including the same KR101437909B1 (en)

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PCT/KR2012/008926 WO2014069678A1 (en) 2012-10-29 2012-10-29 Secondary optical element having carrier protecting function and concentrating solar cell module comprising same

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Citations (2)

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JP2001148501A (en) 1999-11-24 2001-05-29 Honda Motor Co Ltd Photovoltaic power generating device
JP2009081278A (en) 2007-09-26 2009-04-16 Sharp Corp Solar cell, concentrating photovoltaic power generation module, concentrating photovoltaic power generation unit, and solar cell manufacturing method

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JP2009529791A (en) * 2006-03-08 2009-08-20 ライト プレスクリプションズ イノベーターズ エルエルシー Solar concentrator
EP2278631A1 (en) * 2009-07-20 2011-01-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Solar cell component group and solar cell assembly
KR20110013989A (en) * 2009-08-04 2011-02-10 삼성전자주식회사 Solar cell module and method of manufacturing the same
JP2011138970A (en) * 2009-12-29 2011-07-14 Sharp Corp Concentrating solar battery, concentrating solar battery module, and method of manufacturing the same

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2001148501A (en) 1999-11-24 2001-05-29 Honda Motor Co Ltd Photovoltaic power generating device
JP2009081278A (en) 2007-09-26 2009-04-16 Sharp Corp Solar cell, concentrating photovoltaic power generation module, concentrating photovoltaic power generation unit, and solar cell manufacturing method

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