KR101382774B1

KR101382774B1 - Solar cell module

Info

Publication number: KR101382774B1
Application number: KR1020110119362A
Authority: KR
Inventors: 김창우
Original assignee: 엘지이노텍 주식회사
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2014-04-09
Also published as: KR20130053748A

Abstract

According to an embodiment, a solar cell module includes: an upper substrate on which sunlight is incident; A solar cell panel positioned below the upper substrate and including a plurality of solar cells; A lower substrate positioned below the solar cell panel; And a moisture permeation prevention part positioned between the upper substrate and the lower substrate.

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.

On the other hand, after the installation of such a solar cell module, there is a problem in that moisture and the like penetrates into the solar cell module and the reliability is lowered. In particular, there is a problem that moisture permeability is weak in the side portion of the solar cell panel.

Embodiments provide a solar cell module with improved reliability.

Solar cell module according to the embodiment includes a moisture barrier. Through the moisture permeation prevention unit, it is possible to prevent moisture or the like from penetrating into the solar cell module. In particular, the moisture permeability is weak in the side portion of the solar cell panel, through this embodiment, it is possible to prevent the moisture permeation in the side of the solar cell panel. Therefore, durability and reliability of the solar cell module can be improved.

On the other hand, in the solar cell module according to another embodiment it is possible to reduce the cost by omitting the buffer sheet. In addition, a moisture permeation prevention part may be included instead of the buffer sheet to prevent penetration of moisture and the like.

1 is a cross-sectional view of a solar cell module according to a first embodiment.
2 is a cross-sectional view of a solar cell module according to a 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 with reference to FIG. 1. 1 is a cross-sectional view of a solar cell module according to a first embodiment.

Referring to FIG. 1, the solar cell module 10 according to the first embodiment includes a lower substrate 100, a solar cell panel 200, an upper substrate 300, a buffer sheet 400, and a moisture barrier 500. It includes.

The lower substrate 100 is located at the bottom of the solar cell module. The lower substrate 100 may support the solar cell panel 200.

The lower substrate 100 is transparent and has high strength. Examples of the material used for the lower substrate 100 include tempered glass.

The solar cell panel 200 is positioned on the lower substrate 100.

The solar cell panel 200 has a plate shape and includes a plurality of solar cells.

The solar cells 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 may be disposed on a transparent substrate such as a glass substrate.

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

The upper substrate 300 is disposed on the solar cell panel 200. In more detail, the upper substrate 300 is disposed to face the solar cell panel 200.

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

Light may be incident on the upper substrate 300.

The buffer sheet 400 is interposed between the upper substrate 300 and the solar cell panel 200. The buffer sheet 400 protects the solar cell panel 200 from an external physical shock. In addition, the buffer sheet 400 prevents a collision between the upper substrate 300 and the solar cell panel 200.

The buffer sheet 400 may perform an anti-reflection function so that more light is incident on the solar cell panel 200.

The buffer sheet 400 may include a resin. Examples of the material used as the buffer sheet 400 include ethylene vinyl acetate resin (EVA resin).

Subsequently, although not shown, a bus bar is disposed on the solar cell panel 200. The bus bar contacts an upper surface of two of the solar cells and is electrically connected to the solar cells.

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

The first bus bar is in contact with the top of the solar cell at one end of the solar cells, and the second bus bar is in contact with the top of the solar cell at the other end of the solar cells.

The moisture barrier 500 may be located between the upper substrate 300 and the lower substrate 100. Specifically, the moisture permeation prevention part 500 may surround the side surface of the solar cell panel 200 positioned between the upper substrate 300 and the lower substrate 100. In addition, the moisture permeation prevention part 500 may surround the side surface of the buffer sheet 400. In order for the moisture permeation prevention part 500 to be located at the side of the buffer sheet 400, the area of the buffer sheet 400 may be reduced.

The moisture permeation prevention part 500 may be formed by being deposited in a film form.

The moisture permeation prevention part 500 may include a first moisture permeation prevention part 510 and a second moisture permeation prevention part 520. The first moisture barrier 510 and the second moisture barrier 520 may be stacked.

The first moisture barrier 510 may include an inorganic material. The first moisture barrier 510 may include a metal oxide. For example, the first moisture barrier 510 may include aluminum oxide (Al 2 O 3) or silicon dioxide (SiO 2). The thickness of the first moisture barrier 510 may be within 0.5 um.

The second moisture barrier 520 may be located on the first moisture barrier 510. The second moisture barrier 520 may include an organic material. The second moisture barrier 520 may include a polymer. For example, the second moisture barrier 520 may include polypropylene. The second moisture barrier 520 may have a thickness of about 1 μm to about 2 μm.

The second moisture barrier 520 may also be located in the pores 510a of the first moisture barrier 510. That is, the first moisture barrier 510 may include a plurality of pores 510a, the second moisture barrier 520 is located on the first moisture barrier 510, the first 1 Can fill the pores 510a of the moisture permeation prevention part 510.

Through the moisture permeation prevention part 500, it is possible to prevent the moisture and the like from penetrating into the solar cell module. In particular, the moisture permeable to the side portion of the solar cell panel 200, but through the present embodiment, it is possible to prevent the moisture permeation in the side of the solar cell panel 200. Therefore, durability and reliability of the solar cell module can be improved.

Hereinafter, a solar cell module according to a second embodiment will be described with reference to FIG. 2. For the sake of clarity and simplicity, detailed description of the same or similar parts to those of the first embodiment will be omitted.

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

2, in the solar cell module 20 according to the second embodiment, a buffer sheet included in the solar cell module 10 according to the first embodiment may be omitted. In addition, the moisture permeation prevention part 500 may be further located on the solar cell panel 200. That is, the moisture barrier unit 500 may be located between the solar cell panel 200 and the upper substrate 300.

In the solar cell module according to the second embodiment, the cost can be reduced by omitting the buffer sheet. In addition, the moisture permeation prevention part 500 may be included instead of the buffer sheet to prevent penetration of moisture and the like.

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

An upper substrate to which sunlight is incident;
A solar cell panel positioned below the upper substrate and including a plurality of solar cells;
A lower substrate positioned below the solar cell panel; And
It includes a moisture permeation prevention portion positioned between the upper substrate and the lower substrate,
The moisture barrier unit is disposed on the solar cell panel,
The moisture barrier unit further surrounds the side surface of the solar cell panel,
The moisture barrier unit includes a first moisture barrier and a second moisture barrier including a different material,
The first moisture permeation prevention portion includes pores,
The second moisture barrier is a solar cell module disposed in the pores of the first moisture barrier.

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The method of claim 1,
The first moisture barrier and the second moisture barrier is a solar cell module laminated.

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The method of claim 1,
The first moisture permeation prevention unit solar cell module comprising an inorganic material.

The method of claim 1,
The second moisture barrier is a solar cell module comprising an organic material.

The method of claim 1,
The first moisture barrier unit is a solar cell module containing a metal oxide.

The method of claim 1,
The second moisture barrier unit is a solar cell module containing a polymer,

The method of claim 1,
The solar cell module has a thickness of the first moisture barrier is within 0.5 um.

The method of claim 1,
The thickness of the second moisture barrier is 1 um to 2 um solar cell module.