| 摘要 |
PROBLEM TO BE SOLVED: To further accurately calculate remaining capacity, in a power supply system calculating the remaining capacity of a storage battery.SOLUTION: An ECU 70 detects the output voltage and an output current of a lithium ion storage battery 30. Charging and discharging are repeatedly performed on the lithium ion storage battery 30. The ECU 70 calculates the inner resistance of the lithium ion storage battery 30 on the basis of discharge duration time during which the lithium ion storage battery 30 continues discharging since starting the discharging. The ECU 70 calculates the open-circuit voltage of the lithium ion storage battery 30 on the basis of the output voltage, the output current, and the inner resistance, and calculates remaining capacity on the basis of the calculated open-circuit voltage. |
