Solar cell module
First Claim
1. A solar cell module comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the solar cell module is 70°
C. or more and wherein the oxygen permeability of said transparent surface protecting film is not less than 1 cc/m2·
24 hr·
atm and not more than 50 cc/m2·
24 hr·
atm at 25°
C./90% RH, whereby the drop in output of the solar cell module caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%.
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Accused Products
Abstract
A solar cell module is constructed in such an arrangement that a photovoltaic element is covered by at least a sealant resin and a surface protecting film, wherein the oxygen permeability of the surface protecting film is not less than 1 cc/m2·24 hr·atm and not more than 50 cc/m2·24 hr·atm at 25° C./90% RH, thereby providing the solar cell module with high reliability, free of deterioration of the sealant resin, particularly free of yellowing, in long-term outdoor exposure use.
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Citations
26 Claims
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1. A solar cell module comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the solar cell module is 70°
C. or more and wherein the oxygen permeability of said transparent surface protecting film is not less than 1 cc/m2·
24 hr·
atm and not more than 50 cc/m2·
24 hr·
atm at 25°
C./90% RH, whereby the drop in output of the solar cell module caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- m, wherein the use temperature of the solar cell module is 70°
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12. A solar cell module comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the solar cell module is 70°
C. or more and wherein said transparent surface protecting film is sufficiently permeable to oxygen to permit the oxygen to reach said transparent surface sealant resin layer, thereby dissolving any yellow coloration of the transparent surface sealant resin layer, such that the drop in output of the solar cell module caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%.
- m, wherein the use temperature of the solar cell module is 70°
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13. A building material comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film, which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, and fixed to a module backing, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the photovoltaic element is 70°
C. or more and wherein the oxygen permeability of said transparent surface protecting film is not less than 1 cc/m2·
24 hr·
atm and not more than 50 cc/m2·
24 hr·
atm at 25°
C./90% RH, whereby the drop in output of the photovoltaic element caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- m, wherein the use temperature of the photovoltaic element is 70°
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24. A building material comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film, which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, and fixed to a module backing, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the photovoltaic element is 70°
C. or more and wherein said transparent surface protecting film is sufficiently permeable to oxygen to permit the oxygen to reach said sealant resin, thereby dissolving any yellow coloration of the transparent surface sealant resin layer, such that the drop in output of the photovoltaic element caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%.
- m, wherein the use temperature of the photovoltaic element is 70°
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25. An electric power generation system comprising a solar cell module comprising a photovoltaic element covered at the light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film, which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, and a power converting device connected to said solar cell module, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein the use temperature of the solar cell module is 70°
C. or more and wherein the oxygen permeability of said transparent surface protecting film is not less than 1 cc/m2·
24 hr·
atm and not more than 50 cc/m2·
24 hr·
atm at 25°
C./90% RH, whereby the drop in output of the solar cell module caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%.
- m, wherein the use temperature of the solar cell module is 70°
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26. An air circulating system comprising a roofing material comprising a photovoltaic element covered at a light incidence side thereof by a surface covering member comprising at least a transparent surface sealant resin layer and a transparent surface protecting film, which is in contact with the transparent surface sealant resin layer and positioned at the outermost surface on the light incidence side thereof, and fixed to a module backing, said roofing material being fixed with a space to a roof underlayment, wherein the transparent surface protecting film has a thickness of from 50 to 100 μ
- m, wherein air is introduced into the space and is guided through the space to be discharged outdoors or to be taken indoors, wherein the use temperature of the photovoltaic element is 70°
C. and wherein the oxygen permeability of said transparent surface protecting film is not less than 1 cc/m2·
24 hr·
atm and not more than 50 cc/m2·
24 hr·
atm at 25°
C./90% RH, whereby the drop in output of the photovoltaic element caused by yellowing of the surface covering member when subjected to a thermal degradation test at 150°
C. for 15 hours and then exposed to ultraviolet rays under the output of 100 mW/cm2 in the wavelength range of 300 to 400 nm by use of a metal halide lamp is less than 10%.
- m, wherein air is introduced into the space and is guided through the space to be discharged outdoors or to be taken indoors, wherein the use temperature of the photovoltaic element is 70°
Specification