Resistance welding method and conductor unit

A resistance welding method of welding two objects together comprising the steps of:

• clamping the two objects between a pair of electrodes;
• and
• applying a welding current between the pair of the electrodes on a condition that the two objects are pressed to bring the two objects close to each other, so as to allow a contacting surface between the two objects to generate heat,
• wherein one of the two objects includes a core member and a plated layer,
• which coats the core member and has a melting point lower than that of a metal constituting an outer surface of the core member,
• wherein the two objects are clamped between the pair of the electrodes and the contacting surface are allowed to generate heat to melt the plated layer, so as to weld the outer surface of the core member of said one of the two objects and a base member of another of the two objects together,
• wherein at least the outer surface of the core member and the base member are made of respective metals, between which no intermetallic compound is formed.