Solar cell module

• US 20010045505A1
• Filed: 01/31/2001
• Published: 11/29/2001
• Est. Priority Date: 01/31/2000
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Yoshimine, Yukihiro, Nakatani, Shihomi, Morizane, Masashi, Tsuge, Sadaji
• Granted Patent: US 6,667,434 B2
• Time in Patent Office: Days
• US Class Current: 250/200
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: H01L 31/048 Encapsulation of modules
• CPC Class Codes: H01L 31/049 Protective back sheets
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A solar cell module including a plurality of solar cell elements 1 sealed by EVA resin between a front surface glass 20 and a rear surface member 5 is provided with a sodium diffusion preventing layer of a PET film 6 of a smaller water vapor transmission rate than those of the EVA sheets 3, 4 interposed between the front surface glass 20 and the solar cell elements 1.

Claims

1. A solar cell module comprising

a light transmitting member on a front surface side containing at least sodium, a rear surface member, a plurality of solar cell elements sealed with sealing resin between the light transmitting member on the front surface side and the rear surface member, and a sodium diffusion preventive function layer for preventing diffusion of sodium from the light transmitting member on the front surface side arranged between the light transmitting member on the front surface side and the solar cell elements.

2. The solar cell module according to

claim 1

, wherein

the light transmitting member on the front surface side is glass, and the rear surface member is a transparent resin film.

3. The solar cell module according to

claim 1

, wherein

the sodium diffusion preventive function layer is sealing resin of not less than 1.0 mm in thickness arranged between the light transmitting member on the front surface side and the solar cell element.

4. The solar cell module according to

claim 1

, wherein

the sodium diffusion preventive function layer is a resin layer of smaller water vapor transmission rate than that of the sealing resin.

5. The solar cell module according to

claim 4

, wherein

the resin layer is a resin film inserted between the light transmitting member on the front surface side and the solar cell element.

6. The solar cell module according to

claim 5

, wherein

the resin film is inserted at least in a region corresponding to the solar cell element.

7. The solar cell module according to claims 5, wherein

the resin film is a PET film.

8. The solar cell module according to

claim 1

, wherein

the sodium diffusion preventive function layer is formed on a surface on a side of the sealing resin of the light transmitting member on the front surface side.

9. The solar cell module according to

claim 8

, wherein

the sodium diffusion preventive function layer is formed of an inorganic oxide layer, a nitride layer, or a fluoride layer.

10. The solar cell module according to

claim 2

, wherein

the sodium diffusion preventive function layer is formed by reforming a surface of the light transmitting member on the front surface side.

11. The solar cell module according to

claim 1

, wherein

the sodium diffusion preventive function layer is a glass member containing not more than 5 wt. % of sodium.

12. The solar cell module according to

claim 2

, wherein

the water vapor transmission rate of the transparent resin film is not more than 6.3 g/m²•

day.

13. The solar cell module according to

claim 2

, wherein

an inorganic oxide layer, a nitride layer, or a fluoride layer is formed on a surface of the transparent resin film.