BUS BAR CIRCUIT AND JUNCTION BOX PROVIDED THEREWITH

摘要

PROBLEM TO BE SOLVED: To form an optimum internal circuit for the specified current value of a junction box. SOLUTION: A bus bar 15 of a connector module 11 is formed of a tin-plated oxygen free copper, and a bus bar 20 of a fuse module 13 is formed of a tin- plated copper alloy. A bus bar 15 for connector is provided with a welding portion 15a by folding the end, a projection 15d is projected at the welding surface 15c, and the welding portion 20a is also formed at the end part of the bus bar 20 for fuse. The welding portions 15a and 20a are rigidly welded with the projection welding to smash the projections and fuse the tin. As a result, a circuit which may be applied to a heavy current can be formed.