| 摘要 |
PROBLEM TO BE SOLVED: To provide a control valve type lead-acid battery and its charging method capable of contributing to a long service life. SOLUTION: An electrode group is constituted by laminating a positive plate and a negative plate through a separator, and a negative active material in the negative plate contains an additive enhancing charging efficiency or an additive retaining a conductive passage, or the electrode group is constituted by arranging the positive plate and the negative plate in the horizontal direction, and the mass of a positive grid in the battery is made 10-24% of the mass of the battery, charging electric quantity is made 101-110% to discharging electric quantity, and charge is performed in a constant current mode of two or more steps in which the charging voltage in the final step is made 2.25 V/cell to 2.35 V/cell. COPYRIGHT: (C)2008,JPO&INPIT
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