THERMAL EXPANSION STRAIN PREVENTING SOLAR CELL MODULE

摘要

PROBLEM TO BE SOLVED: To manufacture a large solar cell module by a relatively simple manufacturing method using an ordinary ribbon lead wire, while suppressing the manufacturing cost and to prevent occurrence of failure, e.g. removal of a bonded part or open circuit of a wiring material. SOLUTION: A ribbon lead wire solder plated onto an ordinary copper foil is employed as a wiring material for an interconnect 3, which is provided at a connecting part 3C between some solar cell 2A and an adjacent solar cell 2B, with a buffer part 3D for preventing strain due to thermal expansion. The strain buffering part has a saw-tooth shape or a plurality of repeated saw-tooth shapes, in addition to a semicircular shape, as shown on the figure, or an inverted U-shape.