| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of characteristics by eliminating a faulty welding between base plates for all plates constituting a group of plates and a collector terminal, and to enhance manufacturing efficiency through improvement of a current collecting structure of the group of plates. SOLUTION: Current collecting metal members (hoops) are arranged between adjacent ends of the base plates which are protruded at end faces of the group of plates, and the current collecting metal members and the ends of the base plates are welded, constituting in such a manner as electrically conducted between plates of positive electrodes and between plates of negative electrodes via the current collecting metal members.
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