A METHOD OF ESTIMATING STATE OF CHARGE OF BATTERY AND AN APPARATUS FOR MANAGING OF BATTERY

摘要

The present invention relates to a method and a battery management apparatus for estimating a state of charge value of a battery. According to an embodiment of the present invention, measuring a current voltage, current, and temperature of a battery; Determining whether an open circuit voltage measurement condition for the battery is satisfied; Determining whether a DC impedance measurement condition is satisfied when the measurement condition is not satisfied; If the DC impedance measurement condition is not satisfied, performing Fast Fourier Transform (FFT) on the current voltage; Measuring an internal impedance at a frequency of 10 Hz with respect to the converted current voltage; Correcting the DC impedance using the measured internal impedance; And estimating a current state of charge value of the battery using the modified impedance.