Photovoltaic module interconnect joints
Photovoltaic (PV) cells that can be interconnected with improved interconnect joints to form PV cell strings and PV modules. The improved interconnect joints comprise at least two types of adhesive bonding regions to maximize both electrical conductivity and mechanical strength of interconnect joints coupling terminals of PV cells. The disclosed approaches to PV cell interconnection provide greater manufacturing rates and higher quality PV cell strings and PV modules.
1. A method for manufacturing a PV device comprising:
providing a PV cell comprising a plurality of discrete contact pads, the plurality of discrete contact pads extending along a first surface of an interconnect bond line, the interconnect bond line along a first peripheral edge of the PV cell;
dispensing a plurality of discrete electrically conductive bonding material regions on each of the plurality of discrete contact pads on the first surface of the interconnect bond line of the PV cell; and
dispensing a plurality of discrete electrically non-conductive bonding material regions on the first surface of the interconnect bond line of along the first peripheral edge of the PV cell in locations between the plurality of discrete contact pads, wherein ones of the plurality of discrete electrically non-conductive bonding material regions are not in contact with ones of the plurality of discrete electrically conductive bonding material regions, and wherein the ones of the plurality of discrete electrically non-conductive bonding material regions are staggered with the ones of the plurality of discrete electrically conductive bonding material regions along the first surface of the interconnect bond line.
2. The method of claim 1 , wherein dispensing the plurality of discrete electrically non-conductive bonding material regions comprises dispensing the plurality of discrete electrically non-conductive bonding material regions at alternating locations between the plurality of discrete electrically conductive bonding material regions such that bonding regions of the same type are not directly adjacent to one another.
3. A method for manufacturing a PV device comprising:
providing a PV cell comprising a plurality of discrete contact pads, the plurality of discrete contact pads extending along a first surface of an interconnect bond line, the interconnect bond line along a first peripheral edge of the PV cell;
forming a plurality of discrete electrically conductive bonding material regions on each of the plurality of discrete contact pads on the first surface of the interconnect bond line of the PV cell; and
forming a plurality of discrete electrically non-conductive bonding material regions on the first surface of the interconnect bond line of along the first peripheral edge of the PV cell in locations between the plurality of discrete contact pads, wherein ones of the plurality of discrete electrically non-conductive bonding material regions are not in contact with ones of the plurality of discrete electrically conductive bonding material regions, and wherein the ones of the plurality of discrete electrically non-conductive bonding material regions are staggered with the ones of the plurality of discrete electrically conductive bonding material regions along the first surface of the interconnect bond line.
4. The method of claim 1 , wherein forming the plurality of discrete electrically non-conductive bonding material regions comprises forming the plurality of discrete electrically non-conductive bonding material regions at alternating locations between the plurality of discrete electrically conductive bonding material regions such that bonding regions of the same type are not directly adjacent to one another.