Module assembly for thin solar cells
Solar cells are packaged by placing the solar cells between sheets of encapsulants. The encapsulants are exposed to ultraviolet (UV) light to cure the encapsulants and bond the encapsulants together to encapsulate the solar cells. The UV curing steps may be performed to bond one of the encapsulants to a transparent top cover and the solar cells, and to bond the other encapsulant to the solar cells and a backsheet. A protective package that includes the transparent top cover, encapsulated solar cells, and the backsheet is then optionally mounted on a frame.
1. A method of making a solar cell module, the method comprising:
placing a first sheet of encapsulant on a top cover;
placing solar cells on the first sheet of encapsulant;
exposing the first sheet of encapsulant to ultraviolet (UV) light at a first wavelength to bond the first sheet of encapsulant to the top cover; and
exposing the first sheet of encapsulant to UV light at a second wavelength that is different from the first wavelength to bond the solar cells to the first sheet of encapsulant.
2. The method of claim 1 , further comprising:
placing a second sheet of encapsulant on the solar cells; and
encapsulating the solar cells between the first and second sheets of encapsulant.
3. The method of claim 2 , wherein said encapsulating the solar cells is performed by exposing the first and second sheets of encapsulant to UV light at a process step that is different from that of exposing the first sheet of UV light at the first wavelength and that of exposing the first sheet of UV light at the second wavelength.
4. The method of claim 2 , further comprising:
placing a backsheet on the second sheet of encapsulant; and
forming a protective package comprising the backsheet and the encapsulated solar cells.
5. The method of claim 4 , further comprising bonding the second sheet of encapsulant to the first sheet of encapsulant and bonding the backsheet to the second sheet of encapsulant by exposing the first sheet of encapsulant, the second sheet of encapsulant, and the backsheet to UV light at a process step that is different from that of exposing the first sheet of UV light at the first wavelength and that of exposing the first sheet of UV light at the second wavelength.
6. The method of claim 4 , wherein said forming the protective package includes laminating the encapsulated solar cells and the backsheet together to form the protective package.
7. The method of claim 4 , further comprising mounting the protective package on a frame.
8. The method of claim 6 , wherein said forming the protective package is performed by vacuum roll lamination.
9. The method of claim 1 , wherein said placing the solar cells on the top cover includes placing backside contact solar cells on the top cover.
10. The method of claim 1 , wherein said placing the solar cells on the top cover includes placing the solar cells on glass.
11. A method of making a solar cell module, the method comprising:
curing a first encapsulant with ultraviolet (UV) light in a first curing step to bond a top cover to the first encapsulant;
curing the first encapsulant with UV light in a second curing step to bond a plurality of solar cells to the first encapsulant;
curing a second encapsulant with UV light in a third curing step to bond the first and second encapsulants together and encapsulate the plurality of solar cells; and
mounting a protective package comprising the encapsulated plurality of solar cells, the top cover, and a backsheet onto a frame.
12. The method of claim 11 , wherein curing the second encapsulant with UV light in the third curing step bonds the backsheet to the second encapsulant.
13. The method of claim 11 , wherein curing the first encapsulant with UV light in the first curing step bonds a first layer of the first encapsulant to the top cover.
14. The method of claim 11 , wherein curing the first encapsulant with UV light in the second curing step bonds a second layer of the first encapsulant to the plurality of solar cells.