| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed battery equipped with a sealing body with a safety valve excellent in conductivity. SOLUTION: The manufacturing method of a sealed battery which is sealed by caulking-fixing a sealed body 10 on an opening of a bottomed cylindrical outer can 20 includes: a step for preparing, for the sealing body 10, a terminal cap 5 having an external terminal part 5a projecting outside the battery, a flange part 5b located on a circumference of the external terminal part 5a, a small hole 5c which is arranged on the flange part 5b and has smaller diameter on the battery inner face side than the battery outer face side, and a safety valve 3 having a conductive contact part 3a projecting inside the battery, a peripheral part 3b located on a circumference of the conductive contact part 3a, and a pin-shaped projection 3c arranged on the peripheral part 3b; and a rivet-fixing step for inserting the pin-shaped projection 3c of the safety valve into the hole 5c of the terminal cap, crushing a tip end portion of the pin-shaped projection 3c, and rivet-fixing the pin-shaped projection 3c and the hole 5c. On the battery inner face side of the hole 5c of the terminal cap 5, there is provided a corner-cut portion 5d. COPYRIGHT: (C)2011,JPO&INPIT |
