NOVELTY - The soldering device comprises an induction heat source for soldering an electrical conductor to a conductor track on solar cells (9). The heat source includes an inductor loop (2) for generating a high-frequency magnetic field for soldering the conductor, and a holding-down device (3) for pressing the conductor onto the conductor track. The holding-down device: is formed as a field concentrator, where a magnetic field is locally amplified and concentrated; is partly made of or comprises a ferrite material or another material with high magnetic permeability; and comprises a holding-down pin.    USE - The soldering device is useful for connecting solar cells (claimed).    ADVANTAGE - The soldering equipment ensures simple and economical connection of solar cells by induction soldering on very small surfaces of the solar cells with high quality in an optimal and precise manner.    DETAILED DESCRIPTION - The soldering device comprises an induction heat source for soldering an electrical conductor to a conductor track on solar cells (9). The heat source includes an inductor loop (2) for generating a high-frequency magnetic field for soldering the conductor, and a holding-down device (3) for pressing the conductor onto the conductor track. The holding-down device: is formed as a field concentrator, where a magnetic field is locally amplified and concentrated; is made partly of or comprises a ferrite material or another material with high magnetic permeability; comprises a holding-down pin (5) made of ferrite material or another material with high magnetic permeability; and penetrates the inductor loop. The holding-down pin is provided with a tubular base body. A field-concentrator element (7) made of a ferrite material or another material with high magnetic permeability is arranged in a cavity of the base body in a front end of the base body facing the solar cells. The tubular base body is formed open at the front end, and is closed at the front end. The tubular base body has an integral base that is monolithically formed for closing the front end of the base body. A foot part is fastened to the base body to close the front end, and is wider than the base body to increase a support area.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic, perspective view of a holding-down device for soldering device.    Inductor loop (2)    Holding-down device (3)    Holding-down pin (5)    Field concentrator element (7)    Solar cell. (9)