| 摘要 |
<P>PROBLEM TO BE SOLVED: To simply detect the inner pressure rise of a secondary battery. <P>SOLUTION: A plurality of thin wall parts 16a, 16b, 16c are provided in a lid part 14 of the secondary battery 10. Respective thin wall parts 16a, 16b, 16c are in a concave state in an initial state, and changed to a convex state from a concave state having respectively different thresholds in accordance with the inner pressure rise of the secondary battery 10. Appreciation of the inner pressure depends on whether any one of the thin wall parts 16a, 16b, 16c is in the convex state without decomposing the secondary battery 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
