GLAZING ASSEMBLIES THAT INCORPORATE PHOTOVOLTAIC ELEMENTS AND RELATED METHODS OF MANUFACTURE

• US 20090255570A1
• Filed: 07/03/2008
• Published: 10/15/2009
• Est. Priority Date: 04/10/2008
• Status: Abandoned Application

• Current Assignee: Cardinal IG Company (Cardinal Glass Industries Incorporated)
• Original Assignee: Cardinal Solar Technologies Company
• Inventors: Grommesh, Robert C., O'Shaughnessy, Roger D.
• Application Number:
  US12/167,826
• Publication Number:
  US 20090255570A1
• Time in Patent Office: Days
• US Class Current: 136/251
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/0488 Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
• CPC Class Codes: H01L 31/073 comprising only AIIBVI compound semiconductors, e.g. CdS/CdTe solar cells
• CPC Class Codes: Y02E 10/543 Solar cells from Group II-VI materials

Abstract

A photovoltaic panel includes a substrate, a photovoltaic coating extending over, and being adhered to, a central region of a major surface of the substrate, and a flexible and electrically non-conductive film overlaying the photovoltaic coating, such that the photovoltaic coating is sandwiched between the film and the substrate. An assembly, which includes the photovoltaic panel, further includes a second substrate, which is joined to the first substrate, for example, by a seal member, such that an air space is enclosed between the film and the second substrate.

Claims

1. A glazing assembly comprising:

a first substrate including an inner major surface, the inner major surface including a central region and a peripheral region;

a photovoltaic coating extending over, and being adhered to, the central region of the inner major surface of the first substrate;

a flexible and electrically non-conductive film extending directly over approximately an entirety of the photovoltaic coating, such that the photovoltaic coating is sandwiched between the film and the first substrate;

a second substrate opposing the first substrate and including an inner major surface, which faces the inner major surface of the first substrate, the inner major surface of the second substrate including a central region, approximately aligned with the central region of the inner major surface of the first substrate, and a peripheral region, approximately aligned with the peripheral region of the inner major surface of the first substrate; and

a seal member joining the first substrate to the second substrate along the peripheral regions of the inner major surfaces thereof, such that an air space is enclosed between the film and the second substrate.

2. The assembly of claim 1, wherein the film comprises a material selected from the group consisting of:

polyethylene, polypropylene and polyester.

3. The assembly of claim 1, wherein the film is pre-formed and includes an adhesive backing for adhering the film to the photovoltaic layer.

4. The assembly of claim 1, wherein the film is opaque.

5. The assembly of claim 1, wherein a thickness of the film is between approximately 0.001 inch and approximately 0.015 inch.

6. The assembly of claim 1, wherein the film includes an electrical access opening extending therethrough.

7. The assembly of claim 1, wherein the second substrate includes an opening extending therethrough, the opening being located in the central region of the inner major surface thereof.

8. The assembly of claim 1, wherein a width of the air space between the first and second substrates is approximately 0.04 inch.

9. The assembly of claim 1, further comprising a desiccant material adhered to the film and located within the air space.

10. The assembly of claim 1, wherein the first substrate is formed from a light transmitting material.

11. The assembly of claim 1, wherein the second substrate is formed from a light transmitting material.

12. A photovoltaic panel for a glazing assembly, the panel comprising:

a substrate including a major surface, the major surface including a central region and a peripheral region extending completely about the central region;

a photovoltaic coating extending over, and being adhered to, the central region of the major surface of the substrate;

a flexible and electrically non-conductive film being adhered to the photovoltaic coating and extending over approximately an entirety of the photovoltaic coating, such that the photovoltaic coating is sandwiched between the film and the substrate; and

a plurality of desiccant beads adhered to an exposed surface of the film;

wherein the peripheral region of the major surface of the substrate is free of the photovoltaic coating and the film.

13. The panel of claim 12, wherein the film comprises a material selected from the group consisting of:

polyethylene, polypropylene and polyester.

14. The panel of claim 12, wherein the film is pre-formed and includes an adhesive backing for adhering the film to the photovoltaic layer.

15. The panel of claim 12, wherein the film is opaque.

16. The panel of claim 12, wherein a thickness of the film is approximately 0.0035 inch.

17. The panel of claim 12, wherein a thickness of the film is between approximately 0.001 inch and approximately 0.015 inch and the film is formed of a material comprising polyethylene.

18. The panel of claim 12, wherein the film includes an opening extending therethrough.

19. The panel of claim 12, wherein the substrate is formed from a light transmitting material.

20. A method for forming a glazing assembly, the method comprising:

overlaying a photovoltaic coating with a flexible and electrically non-conductive film, the photovoltaic coating being adhered to a central region of a major surface of a first substrate and the central region being surrounded by a peripheral region of the major surface;

adhering a plurality of desiccant beads to an exposed surface of the film; and

joining a second substrate to the first substrate, along the peripheral region thereof, such that an air space is enclosed between the film and the second substrate.

21. The method of claim 20, wherein overlaying the photovoltaic coating with the film comprises adhering an adhesive-backed surface of the film to the photovoltaic coating.

22. The method of claim 20, wherein joining the second substrate to the first substrate comprises affixing a seal member to the peripheral region of the major surface of the first substrate and to a corresponding peripheral region of a major surface of the second substrate.

23. The method of claim 20, further comprising forming an opening through the film, prior to overlaying the photovoltaic coating with the film.

24. The method of claim 20, further comprising forming an opening through the second substrate prior to joining the second substrate to the first substrate.

25. The method of claim 20, further comprising:

forming an opening through the film for access to a bus bar of the photovoltaic coating;

forming an opening through the second substrate; and

coupling an electrical lead wire to the bus bar of the photovoltaic coating through the openings of the film and the second substrate.