| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cell which exhibits excellent weldability while reducing internal short circuit due to generation of sputter. <P>SOLUTION: The cell comprises a wound electrode body having a positive electrode and a negative electrode, an electrolyte provided between the positive electrode and negative electrode, an outer can composed mainly of iron or an iron alloy and housing the wound electrode body, and a first negative electrode lead and a second negative electrode lead which connect the negative electrode and the outer can electrically. The first negative electrode lead and second negative electrode lead are a clad material having a nickel layer and a copper layer. Multiple protrusions are provided on the surface of the nickel layer in the first negative electrode lead, the nickel layer in the second negative electrode lead is welded to the outer can, and the nickel layer in the first negative electrode lead is welded to the copper layer of the second negative electrode lead via the multiple protrusions. <P>COPYRIGHT: (C)2013,JPO&INPIT |
