Patent ID: 6137292
Filing Date: 2000-10-24
Classification: G01R

Abstract:
A method of monitoring the condition of a battery in an electrical system in order to provide a prediction of battery reserve time, comprising the steps of:a) making an initial prediction of battery reserve time (t);b) adjusting the prediction of battery reserve time for changing load conditions in the electrical system until a battery discharge is sensed;c) adjusting the prediction of battery reserve time by summing capacity discharged from battery (AH.sub.out) and capacity restored to battery (AH.sub.in) until the end of Coup de Fouet portion of battery discharge is sensed;d) calculating battery reserve time using diagnostic discharge method until end of battery discharge and beginning of battery recharge is sensed;e) adjusting battery reserve time by summing capacity discharged from battery (AH.sub.out) and capacity restored to battery (AH.sub.in) until end of battery recharge is sensed; andf) repeating step b) through step f).