| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device which can prevent the lifetime of a power capacitor from being shortened by discharging the power capacitor when traveling is not anticipated. SOLUTION: The power supply device includes an electricity accumulation means connected in parallel with a power supply, a means connected with an external power source on the outside of a vehicle and supplying power from the external power source to the electricity accumulation means, a means for detecting whether power is supplied from the external power source or not, and a means for controlling discharge of the electricity accumulation means based on the detection result from the power supply detection means, which indicates that power is supplied from the external power source. COPYRIGHT: (C)2009,JPO&INPIT
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