KR101371823B1

KR101371823B1 - Solar cell module

Info

Publication number: KR101371823B1
Application number: KR1020120022234A
Authority: KR
Inventors: 김경암; 권세한
Original assignee: 엘지이노텍 주식회사
Priority date: 2012-03-05
Filing date: 2012-03-05
Publication date: 2014-03-10
Also published as: KR20130101243A

Abstract

The solar cell module according to the embodiment includes a solar cell panel including a plurality of solar cell; A protective substrate disposed on the solar cell panel; A first buffer part disposed between the solar cell panel and the protective substrate; And a back sheet protecting the solar cell panel, wherein the back sheet includes a first back sheet positioned below the solar cell panel and a second back sheet positioned along side surfaces of the solar cell panel. It includes.

Description

Solar cell module {SOLAR CELL MODULE}

An embodiment relates to a solar cell module.

Photovoltaic modules that convert light energy into electrical energy using photovoltaic conversion effects are widely used as means for obtaining pollution-free energy contributing to conservation of the global environment.

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

In order to output electric power generated from a solar power generation module having a solar cell that generates power from daylight to the outside, conductors serving as both electrodes and negative electrodes are disposed in the solar power generation module, And the ends of the conductors are taken out of the photovoltaic module.

However, in the case of the general structure solar cell module, the reliability of the solar cell module is often deteriorated due to moisture penetration at the edge.

Embodiments provide a solar cell module with improved reliability.

The solar cell module according to the embodiment includes a back sheet, and the back sheet may surround the side surface of the solar cell panel. The penetration path of moisture through the backsheet is long, so that moisture penetrating into the solar cell module can be minimized. Therefore, the reliability of the solar cell module can be improved.

In addition, since the backsheet is colored, the bus bar on the solar panel may be covered. Therefore, a separate operation for covering the bus bar can be omitted, and the process can be simplified.

1 is an exploded perspective view showing a solar cell module according to a first embodiment.
2 is a cross-sectional view taken along the line A-A 'in Fig.
3 is a front view of a solar cell panel included in the solar cell module according to the first embodiment.
4 is a cross-sectional view of the solar cell module according to the second embodiment.

In the description of the embodiments, it is to be understood that each layer (film), area, pattern or structure may be referred to as being "on" or "under / under" Quot; includes all that is formed directly or through another layer. The criteria for top / bottom or bottom / bottom of each layer are described with reference to the drawings.

The thickness or the size of each layer (film), region, pattern or structure in the drawings may be modified for clarity and convenience of explanation, and thus does not entirely reflect the actual size.

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

First, a solar cell module according to a first embodiment will be described in detail with reference to FIGS. 1 to 3. FIG. 1 is an exploded perspective view showing a solar cell module according to a first embodiment. 2 is a cross-sectional view taken along the line A-A 'in Fig. 3 is a front view of a solar cell panel included in the solar cell module according to the first embodiment.

1 to 3, the solar cell module 10 according to the first embodiment includes a frame 100, a solar cell panel 200, a protective substrate 300, a buffer unit 400, and a backsheet 600. ).

The frame 100 is disposed outside the solar cell panel 200. The frame 100 accommodates the solar cell panel 200, the protection substrate 300, and the buffer part 400. More specifically, the frame 100 surrounds the side surface of the solar cell panel 200.

The frame 100 may be, for example, a metal frame 100. For example, the frame 100 may comprise aluminum, stainless steel, iron, or the like.

The solar cell panel 200 is disposed inside the frame 100. The solar cell panel 200 has a plate shape. The solar cell panel 200 includes a plurality of solar cells 210 and a lower substrate 220 supporting the solar cells.

The solar cells 210 may be, for example, a CIGS solar cell, a silicon solar cell, a fuel sensitive solar cell, a II-VI compound semiconductor solar cell, or a III-V compound semiconductor solar cell.

In addition, the solar cells 210 may be disposed on a transparent substrate such as a glass substrate.

The solar cells 210 may be arranged in a stripe form. In addition, the solar cells 210 may be arranged in various forms such as a matrix.

On the other hand, the bus bar 500 is disposed on the solar cell panel 200.

For example, the bus bar 500 includes a first bus bar 510 and a second bus bar 520.

The first bus bar 510 is in contact with the solar cells 210. Specifically, the first bus bar 510 is in contact with the upper surface of the solar cell at one end and the other end of the solar cells 210. The first bus bar 510 contacts the upper surfaces of two solar cells 210 and is electrically connected to the solar cells 210.

The second bus bar 520 extends from the first bus bar 510. In addition, the second bus bar 520 directly contacts the lower substrate 220. The second bus bar 520 extends to an edge of the lower substrate 220. The second bus bar 520 may pass through a groove located at an edge of the lower substrate 220. In addition, the second bus bar 520 may be connected to a connection member located on a lower surface of the lower substrate 220.

The bus bar 500 is a conductor, and examples of the material used for the bus bar 500 include copper and the like.

The protective substrate 300 is disposed on the solar cell panel 200. More specifically, the protective substrate 300 is disposed opposite to the solar cell panel 200.

The protective substrate 300 is transparent and has high strength. Examples of the material used for the protective substrate 300 include tempered glass and the like.

The buffer unit 400 includes a first buffer unit 410 and a second buffer unit 420.

The first buffer part 410 is interposed between the protection substrate 300 and the solar cell panel 200. The first buffer part 410 protects the solar cell panel 200 from external physical impacts. In addition, the first buffer part 410 prevents collision between the protection substrate 300 and the solar cell panel 200.

The second buffer part 420 is interposed between the solar cell panel 200 and the back sheet 600. The second buffer part 420 helps to bond the solar cell panel 200 and the back sheet 600.

The buffering part 400 may perform an antireflection function so that more light is incident on the solar cell panel 200.

Examples of the material used for the buffer part 400 include ethylenevinylacetate resin (EVA resin) and the like.

The protective substrate 300 and the buffer part 400 are disposed inside the frame 100. In more detail, the side surfaces of the solar cell panel 200, the protection substrate 300, and the buffer part 400 are inserted into the frame 100 and fixed.

Subsequently, the backsheet 600 includes a first backsheet 610, a second backsheet 620, and a third backsheet 630. The back sheet 600 protects the solar cell panel 200.

The first back sheet 610 is positioned under the solar cell panel 200. The first backsheet 610 may be located on the front surface of the lower substrate 220.

The second backsheet 620 extends from the first backsheet 610. The second backsheet 620 is positioned along the side of the solar cell panel 200. In detail, the second back sheet 620 may surround the side surface of the solar cell panel 200, the side surface of the first buffer part 410, and the side surface of the second buffer part 420.

The third backsheet 630 extends from the second backsheet 620. The third backsheet 630 is located in the first buffer part 410. In addition, the third backsheet 630 may be located on the second bus bar 520. That is, since the third backsheet 630 is colored, the second bus bar 520 may be covered. Therefore, a separate operation for covering the second bus bar 520 can be omitted. That is, the process can be simplified.

The first back sheet 610, the second back sheet 620, and the third back sheet 630 are integrally formed.

The backsheet 600 may be formed by folding an edge portion of the backsheet 600 into the solar cell module by using a flexible characteristic.

The penetration path of moisture through the backsheet 600 is long, thereby minimizing moisture penetrating into the solar cell module. Therefore, the reliability of the solar cell module can be improved.

Next, a solar cell module according to a second embodiment will be described with reference to FIG. For the sake of clarity and simplicity, detailed description of the same or similar parts to those of the first embodiment will be omitted.

4 is a cross-sectional view of the solar cell module according to the second embodiment.

Referring to FIG. 4, the solar cell module 20 according to the second embodiment includes a backsheet 602, and the backsheet 602 includes a first backsheet 611 and a second backsheet 612. It includes. The first back sheet 611 is positioned under the solar cell panel 200. The second backsheet 612 may surround the side of the solar cell panel 200, the side of the first buffer 410, and the side of the second buffer 420.

That is, unlike the solar cell module 10 according to the first embodiment, it is possible to omit the third back sheet located inside the solar cell module. As a result, solar cell modules having various structures can be secured.

The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified in 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 clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified and implemented. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

Claims

A solar cell panel including a plurality of solar cell cells;
A protective substrate disposed on the solar cell panel;
A first buffer part disposed between the solar cell panel and the protective substrate; And
A back sheet protecting the solar cell panel,
The back sheet includes a first back sheet positioned below the solar cell panel and a second back sheet positioned along a side surface of the solar cell panel.
The back sheet further comprises a third back sheet located in the first buffer portion.

The method of claim 1,
The second backsheet extends from the first backsheet.

The method of claim 1,
The second back sheet is a solar cell module surrounding the side of the solar cell panel and the side of the first buffer portion.

The method of claim 1,
The solar cell module further comprises a second buffer between the solar cell panel and the back sheet.

delete

The method of claim 1,
The third backsheet extends from the second backsheet.

The method of claim 1,
The first backsheet, the second backsheet and the third backsheet are integrally formed.

The method of claim 1,
A bus bar positioned on the solar cell panel and connected to the solar cell;
The bus bar includes a first bus bar positioned on the solar cell and a second bus bar extending from the first bus bar and positioned on the solar cell panel.
And the third backsheet is on the second bus bar.