| 摘要 |
PROBLEM TO BE SOLVED: To provide a low cost battery, in which an operating pressure of a safety valve is low even if a battery becomes thinner, and in which a quality control of a safety valve is easy. SOLUTION: An encapsulated-type battery 1 is comprised of: a metallic battery receptacle 2, which has an opening, and a metallic cover 3, which is welded at the opening and which encloses the battery receptacle after a power- generating element is housed in the battery receptacle. A part of the battery receptacle or a cover neighboring the welded part is fomed to be thin, and the thin portion 4 is kept at the part even after the welding. |
