Patent ID: 6674266
Filing Date: 2004-01-06
Classification: G01R

Abstract:
A method for determining the operating state of an energy-storage battery in assumed temperature and state of charge conditions comprising:a) measuring a temperature variable (TACT) which is correlated with a battery temperature (TBAT); b) determining a state of charge (SOCACT) of the energy-storage battery; c) determining a further state of variable (AACT) of the energy-storage battery; d) forming a reference value (BV) from a reference between the further state variable (AACT) and a corresponding state variable (ANEW) of a substantially identical, new energy-storage battery with the same temperature variable (TACT) and the same state of charge (SOCACT); and e) determining a predicted state variable (AP) as a measure of operating state for an assumed temperature variable (TP) and an assumed state of charge (SOCP) from known comparison reference values (BT), which have been recorded as a function of temperature variables (T), states of charge (SOC) and the aging state of identical energy-storage batteries.