| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To calculate a state of charge of a secondary battery with high accuracy. <P>SOLUTION: A battery ECU 12 comprises: a first SOC calculation part 24 that calculates a first SOC through current integration; and a second SOC calculation part 26 that comprises a calculation part A 28 for calculating a SOC on the basis of current history and a calculation part B 30 for using a charging or discharging curve in a constant current to calculate the SOC. A correction part 32 uses the first SOC and the second SOC to calculate the SOC of a secondary battery 10 and outputs the calculated SOC to a vehicle ECU 14. The SOC accuracy is secured by using the calculation part B at the time of charging and discharging in the constant current. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
