| 摘要 |
PROBLEM TO BE SOLVED: To provide a charger performing constant current charging with an optimal voltage value depending on the magnitude of a charging current in order to suppress deterioration of a secondary battery. SOLUTION: The charger performing constant current-constant voltage charging of a secondary battery 5 comprises a power supply section 14 supplying power for charging the secondary battery 5, a section 11 for measuring the voltage of the secondary battery 5, a section 16 for measuring a charging current flowing through the secondary battery 5, a mode selecting section 13 accepting a charging mode of different set current value at the time of constant current charging, and a power supply control section 12 for altering the set current value depending on a set current value in charging mode accepted at the mode selecting section 13, performing constant current charging until that set current value is reached by controlling the power supply section 14 based on a measured charging current value, and then performing constant voltage charging by controlling the power supply section 14 based on a measured battery voltage. COPYRIGHT: (C)2006,JPO&NCIPI
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