KR101306444B1 - Solar apparatus - Google Patents

Solar apparatus Download PDF

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Publication number
KR101306444B1
KR101306444B1 KR20110128678A KR20110128678A KR101306444B1 KR 101306444 B1 KR101306444 B1 KR 101306444B1 KR 20110128678 A KR20110128678 A KR 20110128678A KR 20110128678 A KR20110128678 A KR 20110128678A KR 101306444 B1 KR101306444 B1 KR 101306444B1
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KR
South Korea
Prior art keywords
solar cell
cell panel
connection
solar
solar cells
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Application number
KR20110128678A
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Korean (ko)
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KR20130062203A (en
Inventor
임진우
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엘지이노텍 주식회사
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Priority to KR20110128678A priority Critical patent/KR101306444B1/en
Publication of KR20130062203A publication Critical patent/KR20130062203A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

A photovoltaic device is disclosed. The solar cell apparatus includes a first solar cell panel; A second solar cell panel adjacent to the first solar cell panel; And a connection member connecting the first solar cell panel and the second solar cell panel, wherein the connection member is inserted into the first solar cell panel and inserted into the second solar cell panel.

Description

[0001] SOLAR APPARATUS [0002]
An embodiment relates to a photovoltaic device.
Photovoltaic devices for converting sunlight to electrical energy include solar panels, diodes, frames, and the like.
The solar cell panel has a plate shape. For example, the solar cell panel has a rectangular plate shape. The solar cell panel is disposed inside the frame. Four side surfaces of the solar cell panel are disposed inside the frame.
The solar cell panel receives solar light and converts it into electric energy. The solar cell panel includes a plurality of solar cell solar cells. In addition, the solar cell panel may further include a substrate, film or protective glass for protecting the solar cell solar cells.
In addition, the solar cell panel includes a bus bar connected to the solar cell solar cells. The bus bars extend from upper surfaces of the outermost solar cell solar cells and are connected to the wiring.
The diode is connected in parallel with the solar cell panel. An electric current flows selectively in the diode. That is, when the performance of the solar cell panel deteriorates, current flows through the diode. Accordingly, a short circuit of the photovoltaic device itself according to the embodiment is prevented. The photovoltaic device may further include wiring connected to the diode and the solar cell panel. The wiring connects solar cell panels adjacent to each other.
The frame houses the solar cell panel. The frame is made of metal. The frame is disposed on a side surface of the solar cell panel. The frame houses a side surface of the solar cell panel. Also, the frame may be composed of a plurality of subframes. At this time, the subframes may be connected to each other.
Since such a photovoltaic device has a large area, it is not easy to install in a roof of a house. Therefore, research on a photovoltaic device having an easy installation and improved performance is in progress.
Such a technology related to the photovoltaic device is disclosed in Korean Patent Laid-Open Publication No. 10-2009-0059529.
The embodiment is to provide a photovoltaic device having an improved performance, which can be easily installed.
The solar cell apparatus according to the embodiment includes a first solar cell panel; A second solar cell panel adjacent to the first solar cell panel; And a connection member connecting the first solar cell panel and the second solar cell panel, wherein the connection member is inserted into the first solar cell panel and inserted into the second solar cell panel.
The solar cell apparatus according to the embodiment may electrically and mechanically connect the first and second solar cell panels to each other by a connection member. In particular, the connection member is inserted into the first solar cell panel and the second solar cell panel. Accordingly, the connection member may mechanically fix the first solar cell panel and the second solar cell panel.
In addition, the connection member is inserted into the first solar cell panel and electrically connected to the first solar cells disposed in the first solar cell panel. In addition, the connection member is inserted into the second solar cell panel and electrically connected to second solar cells disposed in the second solar cell panel.
That is, in the solar cell apparatus according to the embodiment, the connection member is inserted into the solar cell panels, thereby fastening the solar cell panels to each other and simultaneously electrically connecting the solar cell panels. Accordingly, the solar cell apparatus according to the embodiment can be easily fastened and installed.
1 is a plan view illustrating a solar cell apparatus according to an embodiment.
2 is an exploded perspective view illustrating a solar cell panel and a connection member according to an embodiment.
3 is a plan view illustrating a support substrate and solar cells.
4 is a cross-sectional view taken along line BB ′ in FIG. 3.
FIG. 5 is a cross-sectional view showing a section cut along AA 'in FIG. 1; FIG.
FIG. 6 is an enlarged view of a portion C in FIG. 3.
FIG. 7 is an enlarged view of a portion D in FIG. 3.
In the description of the embodiment, each panel, bar, frame, substrate, groove or film is formed "on" or "under" each panel, bar, substrate, The terms " on "and " under " all include being formed either" directly "or" indirectly " In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.
1 is a plan view illustrating a solar cell apparatus according to an embodiment. 2 is an exploded perspective view illustrating a solar cell panel and a connection member according to an embodiment. 3 is a plan view illustrating a support substrate and solar cells. 4 is a cross-sectional view taken along line BB ′ in FIG. 3. 5 is a cross-sectional view showing a section taken along line A-A in Fig. FIG. 6 is an enlarged view of a portion C in FIG. 3. FIG. 7 is an enlarged view of a portion D in FIG. 3.
1 to 7, the photovoltaic device according to the embodiment includes a plurality of solar cell panels P1, P2... Pn and a plurality of connection members 50 fastened to each other.
The solar cell panels are connected to each other by the connection members 50. In more detail, the solar cell panels P1, P2... Pn are mechanically connected and electrically connected by the connection members 50.
The solar panels P1, P2... Pn are disposed adjacent to each other. Side surfaces of the solar panels P1, P2... Pn are adjacent to each other. The solar panels P1, P2... Pn may be flat and fastened to each other.
Each solar cell panel P1, P2... Pn includes a support substrate 10, one or more solar cells C1, C2..., A buffer sheet 20, and a protective substrate 30.
The support substrate 10 supports the solar cells C1, C2... The support substrate 10 has a plate shape. The support substrate 10 may be an insulator. The support substrate 10 may be rigid or flexible. A glass substrate, a plastic substrate, or a metal substrate may be used as the support substrate 10.
The support substrate 10 is formed with a first fastening groove 11 and a second fastening groove 12. The first fastening groove 11 and the second fastening groove 12 may be spaced apart from each other. In this case, the solar cells C1, C2... Are disposed between the first fastening groove 11 and the second fastening groove 12.
The first fastening groove 11 and the second fastening groove 12 may have a shape extending in one direction. The first fastening groove 11 and the second fastening groove 12 may extend in parallel with each other.
3 and 4, the solar cells C1, C2... Are disposed on the support substrate 10. In more detail, the solar cells C1, C2... Are disposed on an upper surface of the support substrate 10.
The solar cells C1, C2 ... are, for example, CIGS-based solar cells, silicon-based solar cells, fuel-sensitized solar cells, II-VI compound semiconductor solar cells or III-V compound semiconductor solar cells. Can be.
The solar cells C1, C2... May be arranged in a stripe shape. In addition, the solar cells C1, C2... May be arranged in various forms such as a matrix form. The solar cells C1, C2... May be connected in series or / and in parallel with each other.
For example, the solar cells C1, C2... May include the back electrode layer 200, the light absorbing layer 300, the buffer layer 400, the high resistance buffer layer 500, and the front electrode layer 600. have. In addition, the solar cells C1, C2... May be connected in series with each other by the connection part 700.
The back electrode layer 200 is disposed on the support substrate 10. In addition, a part 201 of the back electrode layer 200 may be disposed in the first fastening groove 11. That is, the back electrode layer 200 may extend to the inside of the first fastening groove 11. In more detail, a part 201 of the back electrode layer 200 is disposed on the inner surface and the bottom surface of the first fastening groove 11. The rear electrode layer 200 is a conductive layer. Examples of the material used as the back electrode layer 200 include a metal such as molybdenum.
In addition, the rear electrode layer 200 may include two or more layers. At this time, the respective layers may be formed of the same metal or may be formed of different metals.
First through holes TH1 are formed in the back electrode layer 200. The first through holes TH1 are open regions exposing the top surface of the support substrate 10. The first through holes TH1 may have a shape extending in a second direction when viewed in a plan view.
The width of the first through holes TH1 may be about 80 μm to 200 μm.
By the first through holes TH1, the back electrode layer 200 is divided into a plurality of back electrodes. That is, the back electrodes are defined by the first through holes TH1.
The back electrodes are spaced apart from each other by the first through holes TH1. The rear electrodes are arranged in a stripe shape.
Alternatively, the rear electrodes may be arranged in a matrix. At this time, the first through grooves TH1 may be formed in a lattice form when viewed from a plane.
The light absorbing layer 300 is disposed on the back electrode layer 200. In addition, the material included in the light absorbing layer 300 is filled in the first through holes TH1.
The light absorbing layer 300 includes a group I-III-VI compound. For example, the light absorbing layer 300 is copper-indium-gallium-selenide-based (Cu (In, Ga) Se 2; CIGS-based) crystal structure, a copper-indium-selenide-based or copper-gallium-selenide Crystal structure.
The energy band gap of the light absorption layer 300 may be about 1 eV to 1.8 eV.
The buffer layer 400 is disposed on the light absorbing layer 300. The buffer layer 400 includes cadmium sulfide (CdS), and an energy band gap of the buffer layer 400 is about 2.2 eV to 2.4 eV.
The high resistance buffer layer 500 is disposed on the buffer layer 400. The high-resistance buffer layer 500 includes zinc oxide (i-ZnO) that is not doped with impurities. The energy bandgap of the high resistance buffer layer 500 is about 3.1 eV to 3.3 eV.
Second through holes (TH2) are formed in the light absorbing layer (300), the buffer layer (400), and the high resistance buffer layer (500). The second through holes (TH2) penetrate the light absorbing layer (300). In addition, the second through holes TH2 are open regions exposing the top surface of the back electrode layer 200.
The second through grooves TH2 are formed adjacent to the first through grooves TH1. That is, a part of the second through grooves TH2 is formed on the side of the first through grooves TH1 when viewed in plan. The second through holes TH2 have a shape extending in the second direction.
The width of the second through holes TH2 may be about 80 μm to about 200 μm.
In addition, the light absorbing layer 300 defines a plurality of light absorbing portions by the second through holes TH2. That is, the light absorbing layer 300 is divided into the light absorbing portions by the second through holes TH2.
The buffer layer 400 is defined as a plurality of buffers by the second through holes TH2. That is, the buffer layer 400 is divided into the buffers by the second through holes TH2.
The high resistance buffer layer 500 is defined as a plurality of high resistance buffers by the second through holes TH2. That is, the high resistance buffer layer 500 is divided into the high resistance buffers by the second through holes TH2.
The front electrode layer 600 is disposed on the high-resistance buffer layer 500. The front electrode layer 600 is transparent and is a conductive layer. In addition, the resistance of the front electrode layer 600 is higher than the resistance of the back electrode layer 200.
 The front electrode layer 600 includes an oxide. For example, an example of the material used as the front electrode layer 600 may include aluminum doped zinc oxide (AZO) or gallium doped zinc oxide (GZO).
Third through holes TH3 are formed in the light absorbing layer 300, the buffer layer 400, the high resistance buffer layer 500, and the front electrode layer 600. The third through holes TH3 pass through the light absorbing layer 300, the buffer layer 400, the high resistance buffer layer 500, and the front electrode layer 600.
The third through grooves TH3 are formed at positions adjacent to the second through grooves TH2. More specifically, the third through-holes TH3 are disposed beside the second through-holes TH2. That is, when viewed in plan, the third through grooves TH3 are arranged next to the second through grooves TH2. The third through holes TH3 may have a shape extending in the second direction.
The front electrode layer 600 is divided into a plurality of front electrodes by the third through holes TH3. That is, the front electrodes are defined by the third through holes TH3.
The front electrodes have a shape corresponding to the rear electrodes. That is, the front electrodes are arranged in a stripe form. Alternatively, the front electrodes may be arranged in a matrix form.
In addition, the solar cells C1, C2... Are defined by the third through holes TH3. More specifically, the solar cells (C1, C2, ...) are defined by the second through-holes (TH2) and the third through-holes (TH3). That is, the photovoltaic device according to the embodiment is divided into the solar cells C1, C2... By the second through holes TH2 and the third through holes TH3. In addition, the solar cells C1, C2... Are connected to each other in a first direction crossing the second direction. That is, current may flow in the first direction through the solar cells C1, C2...
The connection parts 700 are disposed inside the second through holes TH2. The connection parts 700 extend downward from the front electrode layer 600 and are connected to the back electrode layer 200. For example, the connection parts 700 extend from the front electrode of the first cell C1 and are connected to the back electrode of the second cell C2.
Therefore, the connection parts 700 connect solar cells C1, C2... Adjacent to each other. In more detail, the connection parts 700 connect the front electrode and the rear electrode included in the solar cells C1, C2, ... which are adjacent to each other.
The connection part 700 is formed integrally with the front electrode layer 600. That is, the material used as the connection part 700 is the same as the material used as the front electrode layer 600.
The buffer sheet 20 is interposed between the protective substrate 30 and the support substrate 10. The buffer sheet 20 is disposed on the solar cells C1, C2... The buffer sheet 20 covers the solar cells C1, C2...
The buffer sheet 20 protects the solar cells C1, C2... From external physical shocks. In addition, the buffer sheet 20 prevents a collision between the protective substrate 30 and the solar cells (C1, C2...).
In addition, the buffer sheet 20 may cover the solar cells (C1, C2...). The buffer sheet 20 may seal the solar cells C1, C2... From the outside. The buffer sheet 20 may protect the solar cells C1, C2... From external chemical shock.
The buffer sheet 20 may perform an antireflection function so that more light is incident on the solar cells C1, C2.
The buffer sheet 20 may include an insulator. In more detail, the buffer sheet 20 may be made of an insulator. Examples of the material used as the buffer sheet 20 include ethylene vinyl acetate resin (EVA resin). That is, the buffer sheet 20 is an insulating layer.
The protective substrate 30 is disposed on the buffer sheet 20. In more detail, the protective substrate 30 is disposed to face the solar cell panel 100.
The protective substrate 30 is transparent and has high strength. Examples of the material used for the protective substrate 30 include tempered glass.
The protective substrate 30 may have a shape corresponding to that of the support substrate 10. That is, the planar shape of the protective substrate 30 and the planar shape of the support substrate 10 may be substantially the same.
A third fastening groove 31 and a fourth fastening groove 32 are formed in the protective substrate 30. The third fastening groove 31 may be formed at a position corresponding to the first fastening groove 11, and the fourth fastening groove 32 may be formed at a position corresponding to the second fastening groove 12. have.
In addition, each solar cell panel (P1, P2 ... Pn) may further include a seal. The seal is disposed outside the support substrate 10. The sealing part is interposed between the supporting substrate 10 and the protective substrate 30. The seal may directly contact the support substrate 10 and the protective substrate 30. The seal may surround the solar cells C1, C2... The seal may have a closed loop shape.
Butyl rubber etc. are mentioned as an example of the material used for the said sealing part.
The sealing part seals between the support substrate 10 and the protective substrate 30. The sealing part is firmly bonded to the outside of the support substrate 10 and the protective substrate 30.
The solar panels P1, P2... Pn may have a polygonal shape. That is, the solar cell panels P1, P2... Pn may have a polygonal shape when viewed in plan. In more detail, the solar cell panels P1, P2... Pn may have a hexagonal shape. In more detail, the solar cell panels P1, P2... Pn may have a regular hexagonal shape. Alternatively, the solar cell panels P1, P2... Pn may have a rectangular shape such as a rectangle or a square.
That is, the support substrate 10 and the protective substrate 30 may have a polygonal shape, more specifically, a hexagonal shape.
As shown in FIG. 5, the connection member 50 connects two solar cell panels P1 and P2 to each other. For example, the connection member 50 may connect the first solar cell panel P1 and the second solar cell panel P2 adjacent to the first solar cell panel P1 to each other. In more detail, the connection member 50 may electrically and mechanically connect the first solar cell panel P1 and the second solar cell panel P2.
The connection member 50 is inserted into the first solar cell panel P1, and at the same time, is inserted into the second solar cell panel P2. In addition, the connection member 50 is fastened to the first solar cell panel P1 and fastened to the second solar cell panel P2.
The connection member 50 includes a conductor. In more detail, the connection member 50 may be formed of a conductor. Examples of the material used for the connecting member 50 include metals such as copper, aluminum, silver, tungsten, and the like. Alternatively, the connection member 50 may be formed by coating a conductor such as a metal on an insulator such as a polymer.
The first solar cell panel P1 includes a first support substrate 10a and a first protection substrate 30a facing each other. In addition, the first solar cell panel P1 includes first solar cells 40a disposed on the first support substrate 10a.
In addition, the second solar cell panel P2 includes a second support substrate 10b and a second protection substrate 30b facing each other. In addition, the second solar cell panel P2 includes second solar cells 40b disposed on the second support substrate 10b.
The connection member 50 includes a first fastening protrusion 51, a second fastening protrusion 52, a third fastening protrusion 53, and a fourth fastening protrusion 54.
The first fastening protrusion 51 is fastened to the first fastening groove 11 of the first support substrate 10a. In addition, the second fastening protrusion 52 is fastened to the second fastening groove 12 of the second support substrate 10b. In addition, the third fastening protrusion 53 is fastened to the third fastening groove 31 of the first protective substrate 30a. In addition, the fourth fastening protrusion 54 is fastened to the fourth fastening groove 32 of the second protective substrate 30b.
That is, the connection member 50 is inserted between the first supporting substrate 10a and the first protective substrate 30a and fastened to the first supporting substrate 10a and the first protective substrate 30a. do.
In addition, the connection member 50 is inserted between the second supporting substrate 10b and the second protective substrate 30b and fastened to the second supporting substrate 10b and the second protective substrate 30b. do.
In addition, the connection member 50 is electrically connected to the first solar cell panel P1 and the second solar cell panel P2. The connection member 50 is electrically connected to the first solar cells 40a and electrically connected to the second solar cells 40b.
As shown in FIG. 6, the connection member 50 is connected to the back electrode layer 200a of the first solar cells 40a. In more detail, the connection member 50 is directly connected to the rear electrode of the outermost solar cell among the first solar cells 40a. In more detail, the connection member 50 is directly connected to a portion 201a of the back electrode layer 200a of the first solar cells 40a disposed in the first fastening groove 11.
As shown in FIG. 7, the connection member 50 is connected to the front electrode layer 600b of the second solar cells 40b. In more detail, the connection member 50 is directly connected to the front electrode of the outermost solar cell among the second solar cells 40b.
As described above, the solar cell apparatus according to the embodiment may electrically and mechanically connect the solar panels P1, P2... Pn to each other by the connection members 50. In particular, the connection members 50 are inserted into each solar cell panel. Accordingly, the connection members 50 mechanically fix the solar panels P1, P2... Pn.
In addition, the connection member 50 is inserted into the solar cell panels P1, P2... Pn and electrically connected to the solar cells C1, C2... Disposed in the solar cell panel. . That is, in the solar cell apparatus according to the embodiment, the connection member 50 is inserted into the solar cell panels P1, P2... Pn, and the solar cell panels P1, P2. Can be electrically connected at the same time. Accordingly, the solar cell apparatus according to the embodiment can be easily fastened and installed.
In addition, the features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (9)

  1. A first solar cell panel;
    A second solar cell panel adjacent to the first solar cell panel; And
    And a connection member connecting the first solar cell panel and the second solar cell panel.
    The connection member is inserted into the first solar cell panel, is inserted into the second solar cell panel,
    The first solar cell panel is
    A first support substrate;
    First solar cells disposed on the first base substrate; And
    A first protective substrate disposed on the first solar cells,
    The second solar cell panel
    A second support substrate;
    Second solar cells disposed on the second support substrate; And
    A second protective substrate disposed on the second solar cells;
    The connection member is inserted between the first support substrate and the first protective substrate,
    The connection member is inserted between the second support substrate and the second protective substrate,
    The first protective substrate includes a fastening groove,
    The connecting member includes a fastening protrusion inserted into the fastening groove.
  2. delete
  3. The solar cell apparatus of claim 1, wherein the connection member is electrically connected to the first solar cells and the second solar cells.
  4. The solar cell apparatus of claim 1, wherein the first solar cell panel and the second solar cell panel have a hexagonal shape.
  5. The method of claim 1, wherein the first solar cells
    A first back electrode layer disposed on the first support substrate;
    A first light absorbing layer disposed on the first back electrode layer; And
    A photovoltaic device comprising a first front electrode layer disposed on the first light absorbing layer.
  6. The method of claim 5, wherein the first support substrate comprises a fastening groove,
    The first back electrode layer extends into the fastening groove.
  7. The solar cell apparatus of claim 6, wherein the connection member includes a fastening protrusion inserted into the fastening groove.
  8. The method of claim 5, wherein the second solar cells
    A second back electrode layer disposed on the second support substrate;
    A second light absorbing layer disposed on the second back electrode layer; And
    A second front electrode layer disposed on the second light absorbing layer,
    The connection member is a solar cell apparatus directly connected to the second front electrode layer.
  9. delete
KR20110128678A 2011-12-02 2011-12-02 Solar apparatus KR101306444B1 (en)

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Application Number Priority Date Filing Date Title
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KR101306444B1 true KR101306444B1 (en) 2013-09-09

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KR102177286B1 (en) * 2018-12-12 2020-11-10 이진우 Solar bump having solar thermal power generation function

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060012786A (en) * 2004-08-04 2006-02-09 한국전자통신연구원 Lego-type module of dye-sensitized solar cells
KR20090079855A (en) * 2009-06-23 2009-07-22 유동균 Block design module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060012786A (en) * 2004-08-04 2006-02-09 한국전자통신연구원 Lego-type module of dye-sensitized solar cells
KR20090079855A (en) * 2009-06-23 2009-07-22 유동균 Block design module

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