| 摘要 |
Provided are a method and a charging device for refresh charging of an assembled battery comprising a lead battery, by which the required charge amount can be obtained while reducing the charging time. In a fixed-voltage charging mode, n (n being an integer 1 or greater) gradually smaller intermediate thresholds S1-Sn are set between a prescribed threshold S0 and a minimum current value, and when charging current reaches the n intermediate thresholds S1-Sn, further n auxiliary timer times T1-Tn are set, for which the count is started. A maximum timer time Tm and the n auxiliary timer times T1-Tn are set so as to fulfill the relationship Tm>T1...>Tn, and if either of the counts of the maximum timer time Tm and the n auxiliary timer times T1-Tn are completed before the minimum current value is detected, charging is stopped. |
