Photovoltaic cell and laminate metallization
A photovoltaic laminate is disclosed. Embodiments include placing a first encapsulant on a substantially transparent layer that includes a front side of a photovoltaic laminate. Embodiments also include placing a first solar cell on the first encapsulant. Embodiments include placing a metal foil on the first solar cell, where the metal foil uniformly contacts a back side of the first solar cell. Embodiments include forming a metal bond that couples the metal foil to the first solar cell. In some embodiments, forming the metal bond includes forming a metal contact region using a laser source, wherein the formed metal contact region electrically couples the metal foil to the first solar cell. Embodiments can also include placing a backing material on the metal foil. Embodiments can further include forming a back layer on the backing material layer and curing the substantially transparent layer, first encapsulant, first solar cell, metal foil, backing material and back layer to form a photovoltaic laminate.
1. A photovoltaic system comprising:
a metal foil including a plurality of first patterned fingers and a first interconnect that are each laser-patterned portions of a same metal foil; and
a first solar cell,
wherein the first patterned fingers are laser bonded to the first solar cell at a plurality of metal bond points along each of the first patterned fingers and have a first laser-patterned perimeter, the first patterned fingers extend off the first solar cell in a first direction and the first patterned fingers are continuous with the first interconnect, and the first interconnect is separated from the first solar cell in the first direction by a gap.
2. The photovoltaic system of claim 1 , wherein:
the metal foil further includes a plurality of second patterned fingers and a second interconnect that are each laser-patterned portions of the same metal foil and electrically separated from the first patterned fingers and the first interconnect;
the second patterned fingers are laser bonded to the first solar cell at a plurality of metal bond points along each of the second patterned fingers and have a second laser-patterned perimeter, the second patterned fingers extend off the first solar cell in a second direction that opposes the first direction and the second patterned fingers are continuous with the second interconnect, and the second interconnect is separated from the first solar in the second direction by a gap.
3. The photovoltaic system of claim 1 , further comprising:
a second solar cell,
wherein the metal foil further includes a plurality of third patterned fingers that are each laser-patterned portions of the same metal foil that extend in the first direction from the first interconnect, the third patterned fingers are laser bonded to the second solar cell at a plurality of metal bond points along each of the third patterned fingers and have a third laser-patterned perimeter, and the third patterned fingers extend off the third solar cell in a second direction that opposes the first direction such that the first interconnect is separated from the second solar cell in the second direction by a gap.
4. The photovoltaic system of claim 3 , wherein the first patterned fingers and the second patterned fingers are laser bonded on a backside of the first solar cell.
5. The photovoltaic system of claim 4 , further comprising:
a back layer on the first and second patterned fingers on the backside of the first solar cell.
6. The photovoltaic system of claim 5 , further comprising:
an encapsulant on a front side of the of the first solar cell.