CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL AND METHOD OF MANUFACTURING CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a clad material for a battery negative electrode lead material, capable of inhibiting an electrical loss from becoming large in the battery negative electrode lead material while sufficiently securing weld strength between the battery negative electrode lead material and a battery negative electrode.SOLUTION: This clad material for a battery negative electrode lead material comprises a clad material 50 having a three-layer structure in which an Ni layer 51 composed of Ni, a Cu layer 52 composed of Cu and an Ni layer 53 composed of Ni are diffused and joined to each other in a state of being stacked in this order. A thickness t1 of a diffusion layer 54 formed between the Ni layer 51 and the Cu layer 52 and a thickness t2 of a diffusion layer 55 formed between the Cu layer 52 and the Ni layer 53 are 0.5 μm or more and 3.5 μm or less.SELECTED DRAWING: Figure 3