Patent ID: 7015676

Claim:
A battery control apparatus comprising: a battery temperature detecting device that detects a temperature of a battery by the direct actual temperature of the battery; a state-of-charge determining device that determines a state of charge of the battery; and a battery charge-discharge control device that controls charge-discharge of the battery; wherein said battery charge-discharge control device functions when the temperature of the battery detected by said battery temperature detecting device is equal to or less than a predetermined temperature and the state of charge of the battery determined by said state-of-charge determining device is equal to or greater than a threshold set in advance, for repeating charge and discharge of the battery such that the state of charge varies in a range of 50–60%, and when the state of charge of the battery is less than the threshold, for repeating charge and discharge of the battery such that the state of charge varies in a range of 30–40%.