| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging device which can reduce voltage variation at the completion of charging of power storing elements constituting a battery pack, even at rapid charging, without enlarging the circuits or increasing the cost. SOLUTION: The charging device 1 comprises an ECU 40, wherein a voltage detection part 42 for detecting the voltage values of the power storing elements B1 to Bn; a charging characteristics acquisition part 44 for acquiring the charging characteristics of the power storing elements B1 to Bn, based on the voltage value change during charging of the power storing elements B1 to Bn; and a charging start state setting part 46 for setting a target charging start voltage for each power storing element B1 to Bn, based on a preset target charging completion voltage and the charging characteristics of the power storing elements B1 to Bn, are constructed functionally; a DC-DC converter 20 for supplementally charging the power storing elements B1 to Bn so that the voltage values of the power storing elements B1 to Bn agree with the target charging start voltage; and a charger 30 for rapidly charging the battery pack 10, after the supplemental charging of the power storing elements B1 to Bn. COPYRIGHT: (C)2009,JPO&INPIT
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