Patent ID: 7649338
Filing Date: 2010-01-19
Classification: B60W,G01R

Abstract:
1. A state of charge compensation method for compensating a state of charge of a battery, the compensation method comprising: a) calculating a first state of charge of the battery and a first voltage corresponding to the first state of charge using a charge and discharge current of the battery; b) calculating a rheobasic voltage of the battery using the charge and discharge current of the battery, a voltage of the battery, and an internal resistance of the battery; c) calculating an integration error corresponding to a difference between the first voltage and the rheobasic voltage; d) determining whether the integration error is within a predetermined effective range; e) when the integration error falls outside the predetermined effective range, adding or subtracting a state of charge compensation factor to the first state of charge to obtain a compensated state of charge so that the compensated state of charge falls within a state of charge range corresponding to the predetermined effective range; and f) outputting the compensated state of charge to an external device as a present state of charge of the battery.