Patent ID: 9213068
Filing Date: 2015-12-15
Classification: G01R,H01M,Y02E,Y02T

Abstract:
1. A method for estimating the actual voltage of a battery element of a vehicle battery system, the method comprising the steps of: providing a balancing/sensing circuit having a series resistive element and a series combination of a balancing switch and a balancing resistive element electrically connected in parallel with the battery element; measuring the voltage across the combination of the balancing switch and balancing resistive element when the balancing switch is presumed to be in a “closed” state; and deriving a compensated value for the measured voltage using empirically-derived data, wherein the compensated value compensates for a voltage drop associated with the series resistive element that occurs in the balancing/sensing circuit when the balancing switch is in the “closed” state and the compensated value represents an estimate of the voltage of the battery element.