CONNECTOR FOR PV CELLS AND METHOD FOR ITS PRODUCTION

摘要

The connector for PV cells is a strip of electrically conductive material which has a flat cross-section with two broad sides and with two narrow sides which each connect opposite edges of the broad sides. At least one broad side has a corrugated structure running in longitudinal direction of the strip and is pre-tinned in an area the length of which is somewhat less than the length of the edge of a PV cell. To produce the pre-tinned strips, in a first step a metal foil is guided through a roll gap of a rolling mill in which at least one work roll has a surface with a corrugated structure with the result that a corrugated structure which has crests or peaks and troughs is embossed into at least one side of the metal foil, in a second step soldering tin in the form of solder preforms is applied to the side of the metal foil with the embossed corrugated structure, wherein the soldering flux necessary for pre-tinning has been applied in advance to the solder preforms or the metal foil, in a third step the solder preforms are connected to the metal foil and melted on and in a fourth step the pre-tinned metal foil with the embossed corrugated structure is separated into parallel ribbons. The solder preforms are sufficiently thick for the corrugated structure to be at least full after the solder preforms have been melted on.