| 摘要 |
PURPOSE:To suppress an increase of the inner resistance and improve the life by bringing a retainer having a capillary diameter larger than a retainer in contact with a positive electrode plate into contact with a negative electrode plate. CONSTITUTION:An electrode plate group is constituted with a retainer 4 having a small capillary diameter in contact with a positive electrode plate 1 and a retainer 2 having a large capillary diameter in contact with a negative electrode plate 3. Accordingly, even if the electrolyte is decreased, the electrolyte at the retainer 2 portion in contact with the negative electrode plate 3 is decreased, thus the electrolyte of the retainer 4 in contact with the positive electrode plate 1 is kept unchanged, the contact between the positive electrode plate 1 and the retainer 4 is maintained, the capacity is not reduced, and the life is extended. |
