Photovoltaic window assembly

• US 5,228,925 A
• Filed: 12/23/1991
• Issued: 07/20/1993
• Est. Priority Date: 12/23/1991
• Status: Expired due to Term

• Current Assignee: United Solar Systems Corp.
• Original Assignee: United Solar Systems Corp.
• Inventors: Singh, Avtar, Nath, Prem
• Primary Examiner(s): Weisstuch, Aaron
• Application Number:
  US07/811,645
• Time in Patent Office: 575 Days
• Field of Search: 136/251, 136/291, 296/215
• US Class Current: 136/251
• CPC Class Codes: B60J 7/043 Sunroofs B60J7/047 - B60J7/053 take precedencee.g. sliding above the roof
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H02S 40/34 comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y02T 10/90 Energy harvesting concepts as power supply for auxiliaries' energy consumption, e.g. photovoltaic sun-roof
• CPC Class Codes: Y10S 136/291 Applications

Abstract

A photovoltaic window assembly suitable for use in building and vehicular applications. The window assembly includes an optically-transmissive substrate having one or more photovoltaic devices disposed thereon. A decorative template having cut-outs coextensive with each of the photovoltaic devices is disposed on the substrate such that the photovoltaic devices extend through the cut-outs. A window opening is also formed in the decorative template for transmission of light. An encapsulating layer is formed on the substrate, solar cells and decorative template to protect the solar cells and assembly from environmental damage and deterioration.

Claims

1. A modular photovoltaic window assembly comprising:

a rigid or semi-rigid, optically-transmissive substrate;

at least one large area photovoltaic device disposed on and overlying a portion of said substrate and including at least one electrical connector in electrical communication with said photovoltaic device and disposed proximate an edge thereof;

a decorative template disposed on said substrate and having a first aperture coextensive with said photovoltaic device such that said first aperture exposes all but said electrical connector thereof, and a second aperture defining a window opening; and

a layer of optically-transmissive, environmentally-impervious material encapsulating said photovoltaic device and said substrate.

2. The window assembly of claim 1 wherein said template is disposed adjacent said photovoltaic device on one surface of said substrate, and said layer or impervious material further encapsulates said template.

3. The window assembly of claim 2 further comprising a layer of ethylene vinyl acetate disposed between said template and adjacent photovoltaic device and said substrate to bond said template and adjacent photovoltaic device to said substrate.

4. The window assembly of claim 1 wherein said substrate has first and second surfaces, said photovoltaic device being disposed on said first surface, and said template being disposed on said second surface.

5. The window assembly of claim 1 further comprising a plurality of photovoltaic devices disposed on said substrate and a plurality of first apertures coextensive respectively therewith.

6. The window assembly of claim 1 wherein the large area photovoltaic device is a thin film, silicon alloy photovoltaic device.

7. The window assembly of claim 1 wherein the layer of impervious material is ethylene vinyl acetate.

8. The window assembly of claim 7 further comprising an optically transmissive, polymeric coating disposed on said layer of impervious material.

9. The window assembly of claim 8 wherein said coating is formed of a fluoropolymer.

10. The window assembly of claim 1 further comprising at least one electrical connector in electrical communication with said photovoltaic device.

11. A photovoltaic sunroof module for use with a motor vehicle, said module comprising:

a rigid, optically-transmissive substrate;

at least one large area photovoltaic device disposed on and overlying a portion of said substrate;

a decorative template disposed adjacent said photovoltaic device and having means forming a first aperture coextensive with said photovoltaic device and a second aperture defining a window opening;

an encapsulating layer of optically transmissive material disposed on said substrate, photovoltaic device and template;

an optically-transmissive polymeric coating disposed on said impervious layer; and

an electrical connector in electrical communication with said photovoltaic device for electrical communication with the electrical system of said motor vehicle,

wherein said first aperture exposes all of said device except for said connector thereof.

12. The sunroof panel of claim 11 further comprising an adhesive layer disposed between said template and adjacent photovoltaic device and said substrate to bond said template and adjacent photovoltaic device to said substrate.

13. The sunroof panel of claim 12 wherein said adhesive layer is formed of ethylene vinyl acetate.

14. The sunroof panel of claim 11 further comprising a plurality of photovoltaic devices and a plurality of first apertures coextensive respectively therewith.

15. The sunroof panel of claim 11 wherein the large area photovoltaic device is a thin film, silicon alloy photovoltaic device.

16. The sunroof panel of claim 11 wherein the encapsulating layer is formed of ethylene vinyl acetate.

17. The sunroof panel of claim 11 wherein the coating is formed of a fluoropolymer.