Solar cell sealed by glass laminations

• US 4,224,081 A
• Filed: 11/26/1975
• Issued: 09/23/1980
• Est. Priority Date: 11/27/1974
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Hisatomi, Junichirou, Kawamura, Koichi, Honda, Junichi, Shigemasa, Junichiro
• Primary Examiner(s): Weisstuch, Aaron
• Application Number:
  US05/635,377
• Time in Patent Office: 1,763 Days
• Field of Search: 136/89, 136/89 EP, 136/89 CA, 29/572, 156/99, 250/239
• US Class Current: 136/251
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 31/0488 Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

One or more solar cells are sandwiched by a pair of glass laminations substantially transparent to (i.e., essentially transmissive of) the impinging light, thereby avoiding output drop which may occur due to temperature increase by passing of the impinging light therethrough. A thermoplastic or thermosetting type filler, for example, polyvinylbutyral or a silicone resin is used to fill the cavity surrounded by the glass laminations for accommodating the solar cells therein, while serving as an embedding and potting compound to provide resilient environmental protection for the solar cells. Any room temperature vulcanizing type filler may be used.

Claims

1. A solar cell assembly comprising first and second glass sheets which are transparent to and transmissive to solar radiation, said glass sheets being spaced apart by at least one spacer member adhesively provided at the peripheral edge portion of said glass sheets, said glass sheets and spacer member defining a cavity therebetween, one or more solar cells disposed in said cavity, said cavity further containing a filler material for embedding and potting the solar cells therein and said spacer member comprising one or more openings through which said filler material may be injected.

2. A solar cell assembly as defined in claim 1 wherein the filler material is a thermo-plastic adhesive.

3. A solar cell assembly as defined in claim 2 wherein the thermo-plastic adhesive filler material is a film of polyvinylbutyral resin.

4. A solar cell assembly as defined in claim 1 wherein the filler material is a thermo-setting adhesive.

5. A solar cell assembly as defined in claim 4 wherein the thermo-setting adhesive filler material is a resilient silicone resin.

6. A solar cell assembly as defined in claim 1 wherein the filler material is a room temperature vulcanizing adhesive.

7. A solar cell assembly as defined in claim 1 further comprising electrical connecting means operatively connected with the solar cells and embedded and potted in the filler material.

8. A solar cell assembly as defined in claim 1 wherein the spacer member is silicone resin.

9. The solar cell assembly of claim 1, wherein the spacer member and the filler material are made of a material having the same expansion coefficient.

10. The solar cell assembly of claim 9, wherein said material is a silicone resin.

11. A solar cell assembly comprising first and second glass sheets which are transparent to and transmissive to solar radiation, said glass sheets being spaced apart by at least one spacer member adhesively provided at the peripheral edge portion of said glass sheets, said glass sheets and spacers member defining a cavity therebetween, one or more solar cells disposed in said cavity, said cavity further containing a filler material for embedding and potting the solar cells therein and said spacer member being comprised of a material different from that of said filler material and non-transparent to solar radiation.