SOLAR BATTERY MODULE, PHOTOVOLTAIC APPARATUS, AND MANUFACTURING METHOD OF SOLAR BATTERY MODULE

• US 20130206210A1
• Filed: 10/06/2010
• Published: 08/15/2013
• Est. Priority Date: 10/06/2010
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Niinobe, Daisuke, Matsuno, Shigeru
• Application Number:
  US13/877,594
• Publication Number:
  US 20130206210A1
• Time in Patent Office: Days
• US Class Current: 136/246
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/049 Protective back sheets
• CPC Class Codes: H01L 31/0547 comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
• CPC Class Codes: H01L 31/056 the light-reflecting means being of the back surface reflector [BSR] type
• CPC Class Codes: Y02E 10/52 PV systems with concentrators

Abstract

A solar battery module includes a device array, a substrate, a first sealing portion, a rear-surface protective member, a second sealing portion, and a light scattering portion. The light scattering portion has wavelength selectivity such that an optical reflectivity is not more than 15% over a wavelength region of 500 nanometers to 600 nanometers inclusive, and an optical reflectivity becomes larger than 15% in a wavelength region overlapping on an absorption wavelength range of the photovoltaic device in one of wavelength regions of not more than 350 nanometers and equal to or larger than 700 nanometers, and total integrated scattering of the light scattering portion becomes equal to or larger than 50% in the wavelength region overlapping on the absorption wavelength range of the photovoltaic device in one of the wavelength regions of not more than 350 nanometers and equal to or larger than 700 nanometers.

Claims

1-21. -21. (canceled)

22. A solar battery module comprising:

a device array in which a plurality of photovoltaic devices respectively having a first principal surface on a side to which light mainly enters and a second principal surface on an opposite side to the side to which light mainly enters, and respectively having an optical reflectivity of equal to or less than approximately 10% in a wavelength region of 500 nanometers to 600 nanometers inclusive are arranged;

a substrate that has optical transparency and is arranged on a light incident side with respect to the device array;

a first sealing portion that has optical transparency and is arranged between the device array and the substrate;

a rear-surface protective member that is arranged on an opposite side to the light incident side with respect to the device array;

a second sealing portion that is arranged between the device array and the rear-surface protective member; and

a coloring portion that is arranged in a region corresponding to a gap between the photovoltaic devices in inside of at least one of the first sealing portion, the second sealing portion, the rear-surface protective member, and the substrate, and having an optical reflectivity of equal to or less than 15% over a wavelength region of 500 nanometers to 600 nanometers inclusive, wherein

exterior color tones of the respective photovoltaic devices and a portion between the photovoltaic devices match one another in the solar battery module,

the coloring portion has a region in which an optical reflectivity becomes larger than 15% wavelength-selectively in a wavelength region overlapping on an absorption wavelength range of the photovoltaic device in one of wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers, and

total integrated scattering of the coloring portion becomes equal to or larger than 50% in the wavelength region overlapping on an absorption wavelength range of the photovoltaic device in one of wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers.

23. The solar battery module according to claim 22, wherein the plurality of photovoltaic devices is respectively capable of generating power by light entering into any of the first principal surface and the second principal surface.

24. The solar battery module according to claim 23, wherein

the coloring portion includes

a first light scattering body that has wavelength selectivity and is arranged between the photovoltaic devices, and

a second light scattering body that has wavelength selectivity and is arranged on the second principle surface of the photovoltaic device.

25. A solar battery module comprising:

a device array in which a plurality of photovoltaic devices respectively having a first principal surface on a side to which light mainly enters and a second principal surface on an opposite side to the side to which light mainly enters, while respectively being capable of generating power by light entering into any of the first principal surface and the second principal surface are arranged;

a substrate that has optical transparency and is arranged on a light incident side with respect to the device array;

a first sealing portion that is sealed by a first sealing resin having optical transparency and is arranged between the device array and the substrate;

a rear-surface protective member that is arranged on an opposite side to the light incident side with respect to the device array; and

a second sealing portion that is sealed by a second sealing resin arranged between the device array and the rear-surface protective member, wherein

the first sealing portion and the second sealing portion form an interface on which the first sealing resin and the second sealing resin come in contact with each other in a region corresponding to a gap between the photovoltaic devices,

the second sealing resin is colored by containing a blue or purple pigment,

the second sealing resin has wavelength selectivity such that an optical reflectivity is equal to or less than 15% over a wavelength region of 500 nanometers to 600 nanometers inclusive, and there is a region having an optical reflectivity larger than 15% in a wavelength region overlapping on an absorption wavelength range of the photovoltaic device in one of wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers, and

total integrated scattering of the second sealing resin becomes equal to or larger than 50% in the wavelength region overlapping on the absorption wavelength range of the photovoltaic device in one of the wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers.

26. A solar battery module comprising:

a device array in which a plurality of photovoltaic devices respectively having an optical reflectivity of equal to or less than approximately 10% in a wavelength region of 500 nanometers to 600 nanometers inclusive are arranged;

a substrate that has optical transparency and is arranged on a side to which light mainly enters with respect to the device array;

a first sealing portion that has optical transparency and is arranged between the device array and the substrate;

a rear-surface protective member that is arranged on an opposite side to the side to which light mainly enters with respect to the device array;

a second sealing portion that is arranged between the device array and the rear-surface protective member; and

a coloring portion that is arranged in a region corresponding to a gap between the photovoltaic devices in inside of at least one of the first sealing portion, the second sealing portion, the rear-surface protective member, and the substrate, and having an optical reflectivity of equal to or less than 15% over a wavelength region of 500 nanometers to 600 nanometers inclusive, wherein

exterior color tones of the respective photovoltaic devices and a portion between the photovoltaic devices match one another in the solar battery module,

the coloring portion has a region in which the optical reflectivity becomes larger than 15% wavelength-selectively in a wavelength region overlapping on an absorption wavelength range of the photovoltaic device in one of wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers,

total integrated scattering of the coloring portion becomes less than 50% in the wavelength region overlapping on the absorption wavelength range of the photovoltaic device in one of wavelength regions of equal to or less than 350 nanometers and equal to or larger than 700 nanometers, and

a surface on a light incident side in the coloring portion includes a plurality of slope faces respectively having a reflecting surface inclined with an angle equal to or larger than α

, which satisfies;

α

=(arcsin(1/n))/2

with respect to a light receiving surface of the substrate, when a refractive index of a medium in contact with the light reflecting portion is designated as n.