| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkaline battery having a high output and a high durability by suppressing uneven distribution of electrolytic solution due to swelling of a positive electrode plate in a spiral electrode group. SOLUTION: The electrode plate group is formed from a strip positive electrode plate and a negative electrode plate and by making a separator interposed between the both. After the electrode plate group is wound, it is housed in a metallic battery case, and as for the positive electrode plate, a positive electrode active material is retained by a sintered substrate in which punching metal core material is retained, and the core material has imperforate part in a longitudinal direction to form the alkaline battery. COPYRIGHT: (C)2004,JPO
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