| 摘要 |
<p>A battery (1, 11a to 11c, 31 to 36) includes a cylindrical or polygonal exterior can (2, 12); a safety valve (4, 14, 18, 19, 41 to 46) provided to the exterior can (2, 12) to reduce an internal pressure of the battery (1, 11a to 11c, 31 to 36). The exterior can (2, 12) includes: a relatively thick portion (2a, 2c, 12c) and a relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a). The relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a) constitutes the safety valve (4, 14, 18, 19, 41 to 46). <IMAGE></p> |
