KR101134725B1

KR101134725B1 - Solar cell apparatus

Info

Publication number: KR101134725B1
Application number: KR20090111718A
Authority: KR
Inventors: 조호건
Original assignee: 엘지이노텍 주식회사
Priority date: 2009-11-18
Filing date: 2009-11-18
Publication date: 2012-04-13
Also published as: KR20110054907A

Abstract

PURPOSE: A photovoltaic power generating apparatus is provided to prevent a short due to connection failure by connecting solar cells to other solar cell modules through a circuit board. CONSTITUTION: A solar cell(120) is arranged on the upper side of a support substrate. A circuit board(300) is connected to a solar cell and is arranged on the upper side and lateral side of the support substrate. A bus bar is directly contacted with the upper side of the solar cell and is connected to the circuit board. The circuit board includes a wiring, an adhesive layer, and an insulation layer. The wiring is connected to the bus bar. The adhesive layer is adhered to the support substrate. The insulation layer covers the wiring and the adhesive layer.

Description

SOLAR CELL APPARATUS {SOLAR CELL APPARATUS}

Embodiments relate to a photovoltaic device.

Photovoltaic modules that convert light energy into electrical energy using photoelectric conversion effects are widely used as a means of obtaining pollution-free energy that contributes to the preservation of the global environment.

As photovoltaic conversion efficiency of solar cells is improved, many solar power generation systems with photovoltaic modules have been installed for residential use.

In order to output the power generated from the photovoltaic module having a solar cell that generates power from the solar to the outside, conductors functioning as positive and negative electrodes are arranged in the photovoltaic module, and the current to the outside As connecting terminals to which a cable for output is connected, the ends of the conductors are taken out of the photovoltaic module.

Embodiments can be easily manufactured, and a short circuit is prevented.

Photovoltaic device according to one embodiment includes a support substrate; A solar cell disposed on an upper surface of the support substrate; And a circuit board connected to the solar cell and disposed on an upper surface of the support substrate and a side surface of the support substrate.

The solar cell apparatus according to the embodiment may output electrical energy generated from the solar cell through a circuit board. In particular, the circuit board outputs electrical energy to the outside through the side of the support substrate.

Therefore, the solar cell apparatus according to the embodiment does not need to have a hole for connecting a cable and a solar cell to output the generated electric energy to the outside on the support substrate.

In addition, the circuit board can be easily attached to the supporting substrate by the adhesive layer.

Therefore, the solar cell apparatus according to the embodiment can be easily manufactured.

In addition, since the solar cell apparatus according to the embodiment does not form a hole in the support substrate, it can have a further improved strength.

In addition, the solar cell apparatus according to the embodiment connects the solar cells to another solar cell module through a circuit board, thereby preventing a short circuit due to a poor connection.

In the description of the embodiments, each panel, frame, member, hole or part, etc. is described as being formed "on" or "under" of each panel, frame, member, hole or part, etc. In the case, “on” and “under” include both being formed “directly” or “indirectly” through other components. 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 an exploded perspective view illustrating a solar cell module according to an embodiment. 2 is a plan view illustrating a state in which a solar cell panel, a bus bar, and a flexible printed circuit board are connected. 3 is a rear view illustrating a state in which a flexible printed circuit board and a junction box are connected. 4 is a cross-sectional view illustrating a cross section taken along line AA ′ in FIG. 2. 5 is a perspective view illustrating a flexible printed circuit board. FIG. 6 is a cross-sectional view taken along the line BB ′ in FIG. 5.

1 to 6, a solar cell module according to an embodiment includes a solar cell panel 100, a bus bar 200, a flexible printed circuit board 300, a frame 400, and a junction box 500. ) And cable 600.

The solar cell panel 100 has a plate shape. The solar cell panel 100 is disposed inside the frame 400. The solar panel 100 includes a support substrate 110 and a plurality of solar cells 120.

The support substrate 110 has a plate shape. The support substrate 110 is an insulator. The support substrate 110 may be rigid or flexible. The support substrate 110 may be, for example, a soda lime glass substrate. In addition, the support substrate 110 supports the solar cells 120.

The solar cells 120 are disposed on the support substrate 110. The solar cells 120 receive sunlight and convert it into electrical energy. The solar cells 120 may be connected in series with each other. In addition, the solar cells 120 may have a shape extending in parallel to each other in one direction.

The solar cells 120 may be, for example, CIGS-based solar cells, silicon-based solar cells, or dye-sensitized solar cells.

In addition, although not shown in the drawings, the solar cell module according to the embodiment includes a protective glass and EVA film (ethylene vinylene acetate; EVA).

The protective glass is disposed on the solar cells 120. In addition, the protective glass is disposed inside the frame 400 similarly to the solar cell panel 100. The protective glass protects the solar cells 120 from external physical impact and / or foreign matter. The protective glass is transparent and may be, for example, tempered glass.

The EVA film is interposed between the protective glass and the solar cells 120. The EVA film performs a buffer function between the protective glass and the solar cells 120.

The bus bar 200 is disposed on the solar cell panel 100. The bus bar 200 is disposed on an upper surface of the solar cell 200. The bus bar 200 is directly connected to upper surfaces of the outermost solar cells 121 and 122 among the solar cells 120.

The bus bar 200 is made of a conductor, and examples of the material used as the bus bar 200 include copper, aluminum, tungsten, and molybdenum.

The bus bar 200 extends from an upper surface of the solar cell 200 to an outer region where the solar cells 120 are not disposed.

The bus bar 200 includes a first bus bar 210 and a second bus bar 220. The first bus bar 210 is directly connected to an upper surface of one of the outermost solar cells 121. The second bus bar 220 is directly connected to an upper surface of the other 122 of the outermost solar cells.

In addition, the first bus bar 210 extends from one of the outermost solar cells 121. In addition, the second bus bar 220 may extend in a direction opposite to the first bus bar 210 from the other one 122 of the outermost solar cells.

The flexible printed circuit board 300 is connected to the bus bar 200. The flexible printed circuit board 300 is connected to the solar cells 120 through the bus bar 200. The flexible printed circuit board 300 is disposed on the side surface 112 and the support substrate 110. In more detail, the flexible printed circuit board 300 is disposed over the upper surface 111, the side surface 112, and the lower surface 113 of the support substrate 110. That is, the flexible printed circuit board 300 extends from the bus bar 200 through the side surface 112 of the support substrate 110 to the bottom surface 113 of the support substrate 110. In this case, the flexible printed circuit board 300 may extend into the junction box 500.

The flexible printed circuit board 300 is connected to another solar cell module. The flexible printed circuit board 300 may be connected to an adjacent solar cell module through a cable 600. For example, the flexible printed circuit board 300 may be connected to a circuit board disposed inside the junction box 500 and may be connected to an adjacent solar cell module through a cable 600 connected to the circuit board. have.

In this case, the flexible printed circuit board 300 may be directly connected to the junction box 500 or may be connected through additional wiring.

Alternatively, the flexible printed circuit board 300 may be directly connected to adjacent solar cell modules. For example, driving elements such as diodes for preventing short circuits may be directly provided in the flexible printed circuit board 300, and the flexible printed circuit board 300 may extend directly to adjacent solar cell modules and be directly connected to the flexible printed circuit board 300. .

The flexible printed circuit board 300 is flexible. In addition, the flexible printed circuit board 300 is bonded to the support substrate 110. In more detail, the flexible printed circuit board 300 is bent and adhered to the upper surface 111, the side surface 112, and the lower surface 113 of the support substrate 110.

The flexible printed circuit board 300 includes a wiring 310, an insulating layer 320, and an adhesive layer 330.

The wiring 310 is connected to the bus bar 200. Examples of the material used for the wiring 310 include copper and the like. The wiring 310 may constitute an electric circuit. For example, the wiring 310 includes a first wiring 311 connected to the first bus bar 210 and a second wiring 312 connected to the second bus bar 220.

In this case, the first wiring 311 and the second wiring 312 may be directly connected to the first bus bar 210 and the second bus bar 220, respectively. Alternatively, the first wiring 311 may be connected to the first bus bar 210 through solder paste. That is, the solder paste may directly contact the first wiring 311 and the first bus bar 210. Similarly, the second wiring 312 and the second bus bar 220 may be connected by another solder paste.

The first wiring 311 and the second wiring 312 may have a specific resistance of about 1.72 μΩ · cm. The width of the first wiring 311 and the second wiring 312 is about 2 mm to about 5 mm, and the thickness of the first wiring 311 and the second wiring 312 is about 30 μm. To about 50 μm. Since the first wiring 311 and the second wiring 312 have such a low resistance, the first wiring 311 and the second wiring 312 can efficiently transport currents generated from the solar cells 120.

The insulating layer 320 covers the wiring 310 and the adhesive layer 330. The insulating layer 320 may support the wiring 310 and the adhesive layer 330. The insulating layer 320 is flexible and includes an insulator. The insulating layer 320 insulates the wiring 310. Examples of the material used for the insulating layer 320 include polyimide and the like.

The adhesive layer 330 is interposed between the insulating layer 320 and the support substrate 110. In addition, the adhesive layer 330 is bonded to the support substrate 110. In addition, the adhesive layer 330 is bonded to the wiring 310 or / and the insulating layer 320. Therefore, the flexible printed circuit board 300 is adhered to the support substrate 110 by the adhesive layer 330.

The adhesive layer 330 may be formed of an insulator. The adhesive layer 330 may cover the wiring 310 and insulate the wiring 310. In addition, the adhesive layer 330 includes an exposed area exposing a part of the wiring 310. The wiring 310 is connected to the bus bar 200 through the exposed area.

The frame 400 accommodates the support substrate 110 and the protective glass. The frame 400 surrounds the support substrate 110 and the protective glass. The frame 400 fixes the support substrate 110 and the protective glass.

Examples of the material used for the frame 400 include aluminum or an aluminum alloy.

The junction box 500 is disposed on the bottom surface 113 of the support substrate 110. The junction box 500 accommodates a circuit board on which the diode is installed. In the solar cell module according to the embodiment, the junction box 500 may be omitted. That is, the flexible printed circuit board 300 may be directly connected to the adjacent solar cell module.

The cable 600 extends from the junction box 500. The cable 600 is connected to the flexible printed circuit board 300 through a circuit board accommodated in the junction box 500. In addition, the cable 600 is connected to another solar cell module. That is, the cable 600 connects the flexible printed circuit board 300 to the adjacent solar cell module.

As described above, the cable 600 may be omitted. That is, without the cable 600, the flexible printed circuit board 200 may be directly connected to another solar cell module.

The solar cell module according to the embodiment may output the electrical energy generated from the solar cells 120 through the flexible printed circuit board 300. In particular, the flexible printed circuit board 300 extends through the side surface 112 of the support substrate 110.

Therefore, the solar cell module according to the embodiment does not need to form a hole in the support substrate 110 for connecting the cable 600 and the bus bar 200.

In addition, the flexible printed circuit board 300 may be easily attached to the support substrate 110 by the adhesive layer 330. Therefore, the solar cell module according to the embodiment can be easily manufactured.

In addition, a diode or the like may be directly installed on the flexible printed circuit board 300, and the flexible printed circuit board 300 may be directly connected to an adjacent solar cell module. That is, in the solar cell module according to the embodiment, the junction box 500 and the cable 600 may be omitted. Therefore, the solar cell module according to the embodiment may have a simple structure.

Since the flexible printed circuit board 300 is directly connected to the adjacent solar cell module, the solar cell module according to the embodiment may prevent a short circuit.

In addition, since the solar cell module according to the embodiment does not form a hole in the support substrate 110, it may have a further improved strength.

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 each embodiment 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 embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is an exploded perspective view illustrating a solar cell module according to an embodiment.

2 is a plan view illustrating a state in which a solar cell panel, a bus bar, and a flexible printed circuit board are connected.

3 is a rear view illustrating a state in which a flexible printed circuit board and a junction box are connected.

4 is a cross-sectional view illustrating a cross section taken along line AA ′ in FIG. 2.

5 is a perspective view illustrating a flexible printed circuit board.

FIG. 6 is a cross-sectional view taken along the line BB ′ in FIG. 5.

Claims

Support substrate;

A solar cell disposed on an upper surface of the support substrate;

A bus bar in direct contact with an upper surface of the solar cell; And

And a circuit board connected to the bus bar and disposed on an upper surface of the support substrate, a side surface of the support substrate, and a lower surface of the support substrate.

delete

Support substrate;

A solar cell disposed on an upper surface of the support substrate;

A circuit board connected to the solar cell and disposed on an upper surface of the support substrate and a side surface of the support substrate; And

A bus bar in direct contact with an upper surface of the solar cell and connected to the circuit board,

The circuit board is

Wiring connected to the bus bar;

An adhesive layer adhered to the support substrate; And

And a dielectric layer covering the wiring and the adhesive layer.

The photovoltaic device of claim 3, wherein a thickness of the wiring is 30 μm to 50 μm, and a width of the wiring is 2 mm to 5 mm.

The solar cell apparatus of claim 3, further comprising a solder paste in direct contact with the bus bar and the wiring.

The solar cell apparatus of claim 1, wherein the circuit board is flexible.

According to claim 1, comprising a junction box disposed on the lower surface of the support substrate,

The circuit board extends into the junction box.