Simple method for accurately determining a state of charge of a battery, a battery management system using same, and a driving method thereof

A simple method for more accurately determining a state-of-charge of a battery, comprising:

• measuring a charging and discharging current flowing through a battery, temperature of the battery, and terminal voltage of the battery;
• counting the charging and discharging current, and using a measurement model of the battery to make an estimate of the state-of-charge of the battery;
• generating information associated with errors attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state of charge, and a dynamic of the charging and discharging current;
• and
• making a correction of the estimated state-of-charge of the battery, using the measurement model and the information associated with the error to more accurately determine the state-of-charge of the battery.

A driving method of a battery management system, comprising:

• measuring a charging and discharging current flowing through a battery, a temperature of the battery, and a terminal voltage of the battery;
• counting the charging and discharging current, and generating an estimation of a state-of-charge of the battery in dependence upon a measurement model of the battery;
• generating information associated with an error attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current;
• and
• correcting the estimate of the state-of-charge using the measurement model and the information associated with the error.