| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress deterioration of airtightness of a case.SOLUTION: An injection hole 17 for injecting an electrolyte is provided in a recessed part 19 where a lid 12 is recessed inside. Therefore, in performing work for injecting the electrolyte, the electrolyte is suppressed from being scattered, by the recessed part 19, and the electrolyte hardly adheres to a welded portion of a closing member 18 closing the injection hole 17. Accordingly, the closing member 18 can be reliably welded to the lid 12.</p> |
