| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the risk that abnormal rise of internal pressure cannot be suppressed at the time of abnormality.SOLUTION: A cylindrical battery includes a bottomed cylindrical outer can 1, an electrode body 2 becoming a power generation element, and a sealing body 3 for sealing an opening 12 of the outer can 1. The outer can 1 includes: an electrode body housing section 13 for housing the electrode body 2; a first cylindrical portion 14 provided continuously on the side closer to the opening 12 than the electrode body housing section 13, so that a first support part 16 for supporting the sealing body 3 is formed on the inside by pressing in the diameter-reducing direction; and a second cylindrical portion 15 provided continuously on the side closer to the opening 12 than the first cylindrical portion 14, so that a second support part 17 for holding the sealing body 3 in conjunction with the first support part 16 is formed on the inside by pressing. The first cylindrical portion 14 is formed with a wall thickness B thinner than a wall thickness C of the second cylindrical portion 15.</p> |
