Batteries: thermoelectric and photoelectric – Photoelectric – Panel or array
Patent
1995-05-30
1997-07-22
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Photoelectric
Panel or array
136259, 257433, H01L 31048
Patent
active
056500190
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a solar cell module which excels in weatherability, heat resistance, moisture resistance, scratch resistance, and has an excellent protective ability against external pressure. More particularly, the present invention relates to a solar cell module comprising a photovoltaic element (that is, a solar cell) enclosed by a filler material and a coating material having a three-layered structure which is disposed on the light receiving surface of the solar cell, wherein said coating material is composed of a layer made of hard resin having a hardness of 50 or more in Shore hardness D (hereinafter, referred to as a hard resin layer); a layer having a function of absorbing ultraviolet rays liable to deteriorate the hard resin layer and capable of transmitting light necessary for photoelectric conversion of the solar cell and also having an adhesive function (hereinafter, referred to as an adhesive layer); and a layer made of a resin excellent in weatherability (the resin itself being stable against heat, light, and moisture; hereinafter, referred to as an outermost layer), said hard resin layer, adhesive layer, and outermost layer being laminated on the light receiving surface side of the photovoltaic element in this order from the light receiving surface side. The coating material having the above-described three-layered structure in the solar cell module of the present invention prevents damage to the photovoltaic element when applied with external pressure, and provides the weatherability, heat resistance, moisture resistance, and scratch resistance necessary for the solar cell module.
2. Related Background Art
Recently, a number of thin film solar cells have been proposed. A typical one of these thin film solar cells is an amorphous silicon (a-Si) thin film solar cell. As for the a-Si thin film solar cell, there is known a type in which an a-Si semiconductor film functioning as a photoelectric conversion element is provided on a conductive substrate and a transparent conductive layer is provided on the semiconductor thin film. In the case where the a-Si thin film solar cell having the above construction is used as a power supply means, the surface of the a-Si solar cell on the light incident side must be protected, unlike a solar cell having a construction using a glass sheet as the substrate. For this purpose, a protective means is provided on the surface of the a-Si solar cell on the light incident side. It is most important for the protective means to sufficiently transmit sunlight in order to maintain the conversion efficiency of the solar cell. The protective means is also required to protect the interior of the solar cell against wind and rain and the other external influences (hereinafter, referred to as interior protective ability). It is also important that the protective means itself be prevented from being deteriorated, discolored, and reduced in mechanical strength due to light, heat, and moisture. As such a protective means, there is known a type in which a transparent resin layer of excellent weatherability is provided on the light receiving surface side as a surface coating layer, and a filler material made of thermoplastic transparent resin is provided below the transparent resin layer. The resin layer as the surface coating layer is generally composed of an acrylic resin film or a fluororesin film such as a tetrafluoroethylene-ethylene copolymer film or polyvinyl fluoride film. As described above, a filler material is interposed between the surface coating layer and the solar cell. As the filler material, there is generally used EVA (ethylene-vinyl acetate copolymer), butyral resin, or the like. A back surface film is provided on the back surface of the conductive substrate of the solar cell by means of a filler material. As the back surface film, there is used a nylon film, a fluororesin laminated aluminum film, or the like. Moreover, in a practical solar cell module, a reinforcing material is provided on
REFERENCES:
patent: 5474620 (1995-12-01), Nath et al.
patent: 5482571 (1996-01-01), Yamada et al.
Itoyama Shigenori
Kataoka Ichiro
Mori Takahiro
Yamada Satoru
Canon Kabushiki Kaisha
Weisstuch Aaron
LandOfFree
Solar cell module having a surface coating material of three-lay does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solar cell module having a surface coating material of three-lay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar cell module having a surface coating material of three-lay will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1557859