| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage battery appropriate for use with charge and discharge which have, low internal resistance and heavy current. SOLUTION: An electrode group 10 is formed by winding a positive plate 11 and a negative plate 12 through a separator 13 interposed between them, and a positive electrode collector 14 is welded to the end of a conductive core 11a exposed at the upper end, and a negative electrode collector 15 is welded to an end of a conductive core 12a which is exposed at the lower end so as to form an electrode body 10a. This electrode body 10a is inserted into a battery can 16, and the tip of a collector lead plate 14a extended from the collector 14 is welded to the bottom surface of a sealing body 17, and the electrolyte is filled. The sealing body 17 is placed on an opening part of the battery can 16 via an insulating gasket 18, and an end of the opening part of the battery can 16 is caulked for sealing, and thereafter the battery can 16 is passed through the inside a tubular jig so as to contract the diameter of the battery can 16. At this stage, the negative electrode collector 15 having a diameter smaller than the inside diameter of the battery can 16 before the diameter contraction and larger than the inside diameter of the battery can 16 after the diameter contraction is used.
|
