Patent ID: 7570024

Claim:
A battery control module for use with a battery, comprising: a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a state of charge (SOC) module that communicates with said current and voltage measuring modules and that determines a feature of a SOC transient based on a comparison of a measured battery voltage to a first voltage for said battery at an upper reset limit SOC and a second voltage for said battery at a lower reset limit SOC, wherein said first and second voltages are calculated based on an open circuit voltage of said battery, an ohmic resistance of said battery and a polarization voltage for said measured battery voltage, and wherein said SOC module determines an estimated SOC of said battery and a range for said estimated SOC based on a measured battery current and said measured battery voltage, and determines a modified SOC that is based on said estimated SOC, said range and said feature of said SOC transient.