| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for continuously manufacturing a multi-layered metal foil for a battery safety valve having a structure of at least three layers simultaneously even at a low rolling reduction ratio in an industrially and sufficiently practical technological range, the multi-layered metal foil for the battery safety valve, a battery case lid using the metal foil, and the battery. SOLUTION: In this manufacturing method of the metal foil for the battery safety valve, a third metal is adhered to either of or each of a joining surface of a first metal foil 4 and a joining surface of a second metal foil 5 in a vacuum tank 1 by a dry film forming method, and then, the first metal foil and the second metal foil are press-joined with each other. |
