| 摘要 |
PROBLEM TO BE SOLVED: To estimate the SOC and the full charge capacity of a battery precisely.SOLUTION: The power storage system being mounted on a vehicle including a power storage device performing charge/discharge has a controller which calculates the SOC dependent on the voltage between terminals of the power storage device detected by a voltage sensor, based on the relationship data of the voltage between terminals and the SOC created in advance. The relationship data includes first relationship data corresponding to a first state of the power storage device where the discharge current value is larger than the charge current value in the integrated value thereof, and second relationship data corresponding to a second state of the power storage device where the charge current value is larger than the discharge current value in the integrated value thereof. The controller selects the relationship data corresponding to the first state or second state from the value integrated up to a predetermined timing for calculating the SOC, and calculates the SOC based on the relationship data thus selected. |
