KR20110006351A - Solar cell panel - Google Patents

Abstract

PURPOSE: A solar cell panel is provided to restrain the generation of hot spot due to the impurity. CONSTITUTION: A solar cell module(10) includes the transparent member. A connection part(23) interlinks the upper side part and the lower part. A supporting member(20) supports the solar cell module. A top combining unit and a front of the transparent member are laid on the same plane.

Description

Solar panel {SOLAR CELL PANEL}

The present invention relates to a solar panel, and more particularly to a solar panel with improved reliability.

With the recent prediction of the depletion of existing energy sources such as oil and coal, there is a growing interest in alternative energy to replace them, attracting attention for solar cells that produce electrical energy from solar energy.

A typical solar cell includes a substrate and an emitter layer, each of which is composed of semiconductors of different conductive types, such as p-type and n-type, and electrodes connected to the substrate and the emitter, respectively. At this time, a p-n junction is formed at the interface between the substrate and the emitter portion.

When light is incident on the solar cell, electrons inside the semiconductor become free electrons (hereinafter referred to as electrons) due to a photoelectric effect, and electrons and holes are n in accordance with the principle of pn junction. They move toward the type semiconductor and the p-type semiconductor, for example toward the emitter portion and the substrate. The moved electrons and holes are collected by respective electrodes electrically connected to the substrate and the emitter portion.

In this case, at least one current collector, such as a bus bar, is formed on the emitter portion and the substrate to connect the electrodes disposed on the emitter portion and the substrate.

Since the voltage and current produced by the solar cell of such a configuration is very small, in order to obtain a desired output, a solar cell module of a waterproof type is manufactured by connecting several solar cells in series or in parallel.

The solar panel includes a solar cell module and a frame surrounding the entire circumference of the module.

Such solar panels must be durable under very harsh conditions such as ultraviolet, snow, acid rain, freezing, and deposition of pollution. However, conventionally, a height difference occurs between the front face of the frame and the front face of the solar cell module.

Therefore, when impurities accumulate in the solar cell module, the impurities may not be removed to the outside of the solar cell module, resulting in a hot spot.

In addition, since rainwater that has fallen to the solar cell module does not drain smoothly and penetrates into the solar cell module, there is a problem that the life of the solar cell module is shortened.

In addition, a shadow effect caused by the difference in height between the solar cell module and the front face of the frame has a problem of lowering the output of the solar cell module by preventing light from being incident on a portion of the solar cell module. .

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a solar panel having improved lifetime and reliability by minimizing impurities accumulated near a coupling portion of a solar cell module and a frame and improving self-cleaning ability.

Solar cell panel according to an embodiment of the present invention comprises a solar cell module comprising a transparent member; A support member including an upper edge portion and a lower edge portion and a connection portion connecting the upper edge portion and the lower edge portion, the support member being bonded to a peripheral edge of the solar cell module and supporting the solar cell module by an elastic force; And a female coupling part including an upper coupling part and a lower coupling part and a connection coupling part connecting the same, and a frame for supporting the solar cell module by being coupled to the female coupling part by a support member joined to the solar cell module. do. Here, the front face of the upper engaging portion and the transparent member is located on the same plane.

The upper coupling portion of the frame and the transparent member of the solar cell module may have inclined surfaces corresponding to each other. In this case, the inclined surface of the upper coupling portion may be a first inclined surface inclined toward the connection coupling portion, and the inclined surface of the transparent member may be a second inclined surface of a shape corresponding to the first inclined surface.

The length of the lower coupling portion is preferably formed longer than the length of the upper coupling portion. In this case, an end portion of the lower coupling portion may extend to a position adjacent to the outermost solar cell disposed in the solar cell module, and preferably, an end portion of the lower coupling portion may overlap the outermost solar cell.

The transparent member may include low iron tempered glass, and the low iron tempered glass may be one or more. And the end face of the upper side of the support member may be located on the same plane as the front face of the transparent member and the upper coupling portion.

According to this feature, the height difference is eliminated between the front face of the frame and the front face of the solar cell module.

Therefore, when impurities accumulate in the solar cell module, the impurities may be effectively removed to the outside of the solar cell module, thereby suppressing the occurrence of hot spots due to the impurities.

In addition, since the rain water dropped to the solar cell module is smoothly drained, it is possible to suppress the penetration of moisture into the interior of the solar cell module, thereby improving the moisture resistance to increase the life of the solar cell module.

In addition, since the shadow effect caused by the difference in height between the solar cell module and the front face of the frame can be eliminated, the output of the solar cell module can be increased.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. When a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the case directly above another portion but also the case where there is another portion in between. On the contrary, when a part is "just above" another part, there is no other part in the middle.

An embodiment of the present invention will now be described with reference to the accompanying drawings.

1 is a cross-sectional view showing a bonding state of a solar panel according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing an exploded state of the solar panel shown in FIG.

Referring to FIGS. 1 and 2, the solar panel 100 includes a solar cell module 10, a support member 20 mounted on a peripheral edge thereof, and a support member 20. And a frame 30 supporting 10.

The solar cell module 10 includes a plurality of solar cells 11, an interconnector (not shown) that electrically connects adjacent solar cells 11, and a protective film (EVA) to protect the solar cells 11. Ethylene Vinyl Acetate (13), a transparent member 14 disposed on the protective film 13 toward the light receiving surface of the solar cells 11, and a back sheet disposed under the protective film 13 opposite to the light receiving surface. ), The parts being integrated by a lamination process.

Here, the back sheet 15 prevents moisture from penetrating the back of the solar cell module 10 to protect the solar cells 11 from the external environment. The back sheet 15 may have a multilayer structure such as a layer for preventing moisture and oxygen penetration, a layer for preventing chemical corrosion, and a layer having insulating properties.

The protective layer 13 is integrated with the solar cells 11 by a lamination process in a state where they are disposed on the upper and lower portions of the solar cells 11, respectively, to prevent corrosion due to moisture penetration and to prevent the solar cell 11. ) To protect against shock. The protective layer 13 may be made of a material such as ethylene vinyl acetate (EVA).

The transparent member 14 positioned on the protective film 13 is made of tempered glass having a high transmittance and an excellent breakage preventing function. In this case, the tempered glass may be a low iron tempered glass having a low iron content. Although not shown, the transparent member 14 may be textured on its inner surface to enhance light scattering.

The solar cell module 10 includes the steps of testing the solar cells 11, electrically connecting the plurality of tested solar cells 11 by an interconnector, the components sequentially, for example from below Arranging the back sheet 15, the lower passivation layer, the solar cells 11, the upper passivation layer, and the transparent member 14 in this order; performing the lamination process in a vacuum state to integrate the components, and edge trimming. It is manufactured according to the process sequence such as edge trimming step and module test step.

The support member 20 bonded to the peripheral edge of the solar cell module 10 includes an upper side 21, a lower side 22, and a connection 23 connecting them. The support member 20 may be made of a tape of a material having an elastic force.

In addition, the frame 30 supporting the solar cell module 10 is coupled to the peripheral edge of the solar cell module 10 so that the frame 30 supporting the solar cell module 10 has an L-shaped cross section with a female coupling part 31. The leg portion 32 of the. The female coupling portion 31 is for coupling the support member 20, and the upper coupling portion 31a coupled to the upper edge portion 21, the lower coupling portion 31b coupled to the lower edge portion 22 and the connecting portion ( And a connection coupling portion 31c coupled with the 23.

In the solar cell panel having such a configuration, according to the present embodiment, the front face of the upper coupling portion 31a of the frame 30 is referred to as the light source facing surface and the front face of the transparent member 14. It is characterized in that it is located on the same plane (SP; Same Plane). That is, there is no height difference between the front face of the upper engaging portion 31a and the front face of the transparent member 14.

To this end, the upper coupling portion 31a of the frame 30 is formed to include the first inclined surface 33, and the transparent member 14 is formed to include the second inclined surface 14a.

The first and second inclined surfaces 33 and 14a are formed in shapes corresponding to each other. More specifically, the first inclined surface 33 of the upper coupling portion 31a is formed to be inclined in the direction toward the coupling coupling portion 31c, and the second inclined surface 14a of the transparent member 14 is the transparent member 14. It is formed to be inclined in the direction toward the edge of the.

Therefore, when the support member 20 is coupled to the female coupling portion 31 of the frame 30 while being bonded to the peripheral edge of the solar cell module 10, the front face and the upper side of the upper coupling portion 31a The end face of the part 21 and the front face of the transparent member 14 are both located on the same plane SP.

Here, the upper edge portion 21 of the support member 20 is pre-machined in accordance with the inclination of the first inclined surface 33 and the second inclined surface 14a so that its end face is located on the same plane SP. It is desirable to.

On the other hand, the lower coupling portion 31b of the female coupling portion 31 is formed longer than the upper coupling portion 31a. In this case, an end of the lower coupling part 31b may extend to a position adjacent to the outermost solar cell 11 disposed in the solar cell module 10. For example, an end portion of the lower coupling part 31b may partially overlap the solar cell 11 disposed at the outermost part as shown in FIGS. 1 and 2.

If the female coupling part 31 is comprised as mentioned above, it can prevent that the impact resistance of the transparent member 14 is reduced by the inclined surface 14a.

In the above description, the edge portion of one transparent member is formed as a second inclined surface, but the two transparent members can be used. In this case, the transparent member can be formed by adhering one transparent member having an inclined edge portion to the other flat transparent member.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a cross-sectional view showing a bonding state of a solar cell panel according to an embodiment of the present invention.

2 is a cross-sectional view illustrating an exploded state of FIG. 1.

Brief description of the main parts of the drawing

10 solar cell module 14 transparent member

20: support member 30: frame

100: solar panel

Claims (15)

A solar cell module comprising a transparent member; A support member including an upper edge portion and a lower edge portion and a connection portion connecting the upper edge portion and the lower edge portion, the support member being bonded to a peripheral edge of the solar cell module and supporting the solar cell module by an elastic force; And A female coupling part including an upper coupling part and a lower coupling part and a connecting coupling part connecting the same, and a support member joined to the solar cell module to support the solar cell module by being coupled to the female coupling part. Including; And the front face of the upper coupling portion and the transparent member are on the same plane. In claim 1, The upper coupling part and the transparent member have a sloped surface having a shape corresponding to each other. In claim 2, The inclined surface of the upper coupling portion is a first inclined surface inclined toward the connection coupling portion, the inclined surface of the transparent member is a solar cell panel, characterized in that the second inclined surface corresponding to the first inclined surface. The method according to any one of claims 1 to 3, The length of the lower coupling portion is a solar cell panel, characterized in that formed longer than the length of the upper coupling portion. In claim 4, The transparent member is a solar cell panel, characterized in that it comprises a low iron tempered glass. In claim 5, The low iron tempered glass is a solar panel, characterized in that at least one sheet. In claim 5, An end surface of the upper side of the support member is located on the same plane as the front face of the transparent member and the upper coupling portion. In claim 4, An end portion of the lower coupling portion extends to a position adjacent to the outermost solar cell disposed in the solar cell module. In claim 8, The transparent member is a solar cell panel, characterized in that it comprises a low iron tempered glass. The method of claim 9, The low iron tempered glass is a solar panel, characterized in that at least one sheet. The method of claim 9, An end surface of the upper side of the support member is located on the same plane as the front face of the transparent member and the upper coupling portion. In claim 8, An end portion of the lower coupling portion overlaps with the outermost solar cell. In claim 12, The transparent member is a solar cell panel, characterized in that it comprises a low iron tempered glass. The method of claim 13, The low iron tempered glass is a solar panel, characterized in that at least one sheet. The method of claim 13, An end surface of the upper side of the support member is located on the same plane as the front face of the transparent member and the upper coupling portion.

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