KR101349547B1

KR101349547B1 - Solar cell apparatus

Info

Publication number: KR101349547B1
Application number: KR1020110114189A
Authority: KR
Inventors: 배도원
Original assignee: 엘지이노텍 주식회사
Priority date: 2011-11-03
Filing date: 2011-11-03
Publication date: 2014-01-10
Also published as: KR20130049122A

Abstract

A photovoltaic device is disclosed. The solar cell apparatus includes a solar cell panel including a plurality of solar cells; An accommodation unit disposed below the solar cell panel; A wire electrically connected to the solar cells and extending to the receiving portion; And a protective film covering a lower surface of the accommodating part and the solar cell panel.

Description

SOLAR CELL APPARATUS {SOLAR CELL APPARATUS}

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 cells. The solar cell panel may further include a substrate, a film or a protective glass for protecting the solar cells.

In addition, the solar cell panel includes a bus bar connected to the solar cell. The bus bars extend from the upper surface of the outermost solar cells and are connected to the wirings.

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.

Such a photovoltaic device is mounted on the outdoors and converts sunlight into electric energy. At this time, the photovoltaic device may be exposed to an external physical shock, an electric shock, and a chemical shock.

Such a technology related to the photovoltaic device is disclosed in Korean Patent Laid-Open Publication No. 10-2009-0059529.

Embodiments provide a photovoltaic device having improved reliability and efficiency.

Photovoltaic device according to one embodiment includes a solar cell panel including a plurality of solar cells; An accommodation unit disposed below the solar cell panel; A wire electrically connected to the solar cells and extending to the receiving portion; And a protective film covering a lower surface of the accommodating part and the solar cell panel.

A photovoltaic device according to one embodiment includes a solar cell panel; And a heat transfer protective film disposed on the bottom surface of the solar cell panel.

The photovoltaic device according to the embodiment includes a protective film covering the receiving portion and the lower surface of the solar cell panel. That is, the photovoltaic device may seal a space between a receiving portion for protecting a device such as a bypass diode and a lower surface of the solar cell panel using the protective film.

Therefore, the solar cell apparatus according to the embodiment can prevent the moisture from penetrating into the space between the lower surface of the solar cell panel and the receiving portion. The solar cell apparatus according to the embodiment may have improved durability and reliability.

In addition, the protective film may include a plurality of thermally conductive particles, and may have a high thermal conductivity. Accordingly, the solar cell apparatus according to the embodiment may have improved heat dissipation characteristics.

Therefore, the photovoltaic device according to the embodiment may prevent the efficiency decrease due to the temperature rise and may have an improved photoelectric conversion efficiency.

1 is an exploded perspective view showing a photovoltaic device according to an embodiment.
2 is a perspective view illustrating a rear surface of the solar cell apparatus according to the embodiment.
3 is a cross-sectional view showing a cross section of the solar cell apparatus according to the embodiment.
4 is an enlarged cross-sectional view of a portion A in FIG. 3.
5 is a perspective view illustrating a rear surface of a solar cell apparatus according to another embodiment.
FIG. 6 is a cross-sectional view showing one end surface of the photovoltaic device according to another embodiment.

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 to 4, a solar cell module according to an embodiment includes a solar cell panel 100, a protective substrate 200, a buffer sheet 300, a sealing part 400, a junction box 500, and heat dissipation protection. Film 600.

The solar cell panel 100 has a plate shape and includes a plurality of solar cells 120.

The solar cells 120 may be, 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.

In addition, the solar cells 120 may be disposed on a transparent substrate 110 such as a glass substrate.

The solar cells 120 may be arranged in a stripe shape. In addition, the solar cells 120 may be arranged in various forms such as a matrix form. The solar cells 120 may be connected in series or in parallel with each other.

The protective substrate 200 is disposed on the solar cell panel 100. In more detail, the protective substrate 200 is disposed to face the solar cell panel 100.

The protective substrate 200 is transparent and has a high strength. Examples of the material used as the protective substrate 200 may include tempered glass.

The buffer sheet 300 is interposed between the protective substrate 200 and the solar cell panel 100. The buffer sheet 300 protects the solar cell panel 100 from an external physical shock. In addition, the buffer sheet 300 prevents a collision between the protective substrate 200 and the solar cell panel 100.

In addition, the buffer sheet 300 may cover the solar cells 120. The buffer sheet 300 may seal the solar cells 120 from the outside. The buffer sheet 300 may protect the solar cells 120 from an external chemical shock.

The buffer sheet 300 may perform an anti-reflection function so that more light is incident on the solar cell panel 100.

The buffer sheet 300 may include an insulator. In more detail, the buffer sheet 300 may be made of an insulator. Examples of the material used as the buffer sheet 300 include ethylene vinyl acetate resin (EVA resin). That is, the buffer sheet 300 is an insulating layer.

The sealing part 400 is disposed outside the solar cell panel 100. The sealing part 400 is interposed between the solar cell panel 100 and the protective substrate 200. The sealing part 400 may directly contact the solar cell panel 100 and the protective substrate 200. The sealing unit 400 may surround the buffer sheet 300. The sealing part 400 may have a closed loop shape.

Examples of the material used for the sealing part 400 include butyl rubber and the like.

The sealing part 400 seals between the solar cell panel 100 and the protective substrate 200. The sealing part 400 is firmly bonded to the outside of the solar cell panel 100 and the protective substrate 200.

In addition, the solar cell apparatus according to the embodiment may further include a frame. The frame is disposed outside the solar cell panel 100. The frame accommodates the solar cell panel 100, the protective substrate 200, the buffer sheet 300, and the electric shock protective layer 500. In more detail, the frame surrounds the side surface of the solar cell panel 100. The protective substrate 200, the buffer sheet 300, and the seal 400 may be disposed inside the frame.

The junction box 500 is disposed below the solar cell panel 100. In more detail, the junction box 500 is attached to the bottom surface of the solar cell panel 100. The junction box 500 may be formed of plastic or the like.

The junction box 500 accommodates an element for driving the solar cell panel 100. For example, the junction box 500 may accommodate a device such as a bypass diode 530. That is, the junction box 500 is a receiving portion for accommodating such an element.

Two bus bars 130 are connected to the solar cell panel 100. The bus bars 130 are connected to the outermost solar cells 120. In more detail, the bus bars 130 may be directly bonded to upper surfaces of the outermost solar cells 120.

In addition, the solar cell apparatus according to the embodiment includes connection wires 510 connected to the bus bars 130, respectively. The connection wires 510 extend from the bus bars 130 to the junction box 500. In more detail, the connection wires 510 are electrically connected to the solar cells 120 through the bus bars 130.

The connection wire 510 may pass through the heat dissipation protective film 600. The connection line 510 may pass through the heat dissipation protective film 600 and the junction box 500. In this case, a hydrophobic coating layer may be formed between the connection line 510 and the heat dissipation protective film 600.

Unlike this, referring to FIGS. 5 and 6, the connection line 510 may be disposed between the heat dissipation protective film 600 and the bottom surface of the solar cell panel 100. That is, the connection wire 510 may not penetrate the heat dissipation protective film 600. That is, the heat dissipation protective film 600 may cover not only the junction box 500 but the connection wiring 510 as a whole.

The connection line 510 may be connected to the bypass diode 530 in the junction box 500.

In addition, the solar cell apparatus according to the embodiment may further include a wiring 520 for connecting to another solar cell module or power storage device. The wiring 520 may also penetrate the heat dissipation protective film 600.

The heat dissipation protective film 600 is disposed under the solar cell panel 100. The heat dissipation protective film 600 covers the bottom surface of the solar cell panel 100 and the junction box 500. In more detail, the heat dissipation protective film 600 covers the bottom surface of the solar cell panel 100 and the junction box 500. In addition, the heat dissipation protective film 600 may cover the side surface of the solar cell panel 100. In addition, the heat dissipation protective film 600 may cover the side surface of the sealing portion. In addition, the heat dissipation protective film 600 may cover the side of the protective substrate.

The heat dissipation protective film 600 is an insulator. The heat dissipation protective film 600 may have hydrophobicity. The heat dissipation protective film 600 may include a thermoplastic resin. The heat dissipation protective film 600 may include polyethylene, fluorocarbon or polytetrafluoroethylene.

Referring to FIG. 4, the heat dissipation protective film 600 may include a host layer 610 and a plurality of heat conductive particles 620.

The host layer 610 may include a polymer. The host layer 610 may include a thermoplastic resin. The host layer 610 may include polyethylene, fluorocarbons or polytetrafluoroethylene.

The thermally conductive particles 620 are disposed in the host layer 610. The thermally conductive particles 620 have a higher thermal conductivity than the host layer 610.

The thermally conductive particles 620 include a metal or a metal compound. In more detail, the thermally conductive particles 620 may include a metal such as aluminum, silver, copper, or iron. In addition, the thermally conductive particles 620 may include a metal oxide such as titanium oxide.

The thermally conductive particles 620 may improve the overall thermal conductivity of the heat dissipation protective film 600. Accordingly, the heat dissipation protective film 600 may have a high thermal conductivity while being an insulator as a whole.

Therefore, the heat dissipation protective film 600 may effectively seal between the solar cell panel 100 and the junction box 500. In addition, the heat dissipation protective film 600 may effectively seal the side and bottom of the solar cell panel 100.

At the same time, since the heat dissipation protective film 600 has a high thermal conductivity, the heat of the solar cell panel 100 can be effectively released to the outside.

As described above, the heat dissipation protective film 600 covers the bottom surface of the junction and the solar cell panel 100. That is, the solar cell apparatus may seal a space between the junction box 500 and the lower surface of the solar cell panel 100 using the heat dissipation protective film 600.

Accordingly, the solar cell apparatus according to the embodiment may prevent the moisture from penetrating into the space between the lower surface of the solar cell panel 100 and the junction box 500. The solar cell apparatus according to the embodiment may have improved durability and reliability.

At the same time, the heat dissipation protective film 600 may include the thermally conductive particles 620 and may have a high thermal conductivity. Accordingly, the solar cell apparatus according to the embodiment may have improved heat dissipation characteristics.

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

A solar cell panel including a plurality of solar cells;
A junction box disposed under the solar cell panel;
Wiring electrically connected to the solar cells and extending to the junction box; And
A protective film covering a bottom surface of the junction box and the solar cell panel,
The wiring passes through the protective film,
In the wiring, the photovoltaic device is a hydrophobic coating film is formed in the portion passing through the protective film.

The solar cell apparatus of claim 1, wherein the protective film has hydrophobicity.

The solar cell apparatus of claim 2, wherein the protective film comprises a thermoplastic resin.

The solar cell apparatus of claim 1, wherein the protective film comprises polyethylene, fluorocarbon, or polytetrafluoroethylene.

The method of claim 1, wherein the protective film
A host layer covering a bottom surface of the junction box and the solar cell panel; And
A photovoltaic device comprising a plurality of thermally conductive particles disposed in the host layer.

The method of claim 5, wherein the host layer comprises a polymer,
The thermally conductive particles comprise an inorganic material.

The solar cell apparatus of claim 6, wherein the thermally conductive particles have a higher thermal conductivity than the host layer.

The photovoltaic device of claim 6, wherein the thermally conductive particles comprise a metal oxide.

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