Patent ID: 7858880

Claim:
A conductive terminal structure obtained by welding a first conductive terminal including a projection and made of a tinned flat copper plate and a second conductive terminal made of a tinned flat copper plate to each other by resistance welding, the conductive terminal structure having the following features: (1) the first conductive terminal is molded such that a step portion is formed at a position spaced away from a tip end position of the first conductive terminal and the projection is formed at a tip end portion ranging from the tip end position to the step portion; (2) the first and second conductive terminals are molded such that a weld surface of the second conductive terminal has a size to cover the entire tip end portion of the first conductive terminal; (3) the first and second conductive terminals are molded such that the tip end portion of the first conductive terminal has a sectional area substantially equal to a sectional area of a weld portion of the second conductive terminal; and (4) the projection of the first conductive terminal is melted into and is welded to the weld surface of the second conductive terminal.