Apparatus and method for battery equalization

摘要

There is provided an apparatus for equalization of a battery pack that is composed of plural battery cells. The apparatus includes: a cell balancing device equalizing the voltages of the plural battery cells; a battery cell monitor monitoring the voltage and/or current of each battery cell; a correction voltage calculator calculating correction voltage for a subject battery cell that needs to be equalized, based on the monitored voltage and/or current of the subject battery cell, wherein the correction voltage depends on internal resistance of the subject battery cell; and a cell balancing controller determining the subject battery cell. The cell balancing controller corrects target voltage for equalization of the subject battery cell by the calculated correction voltage, and causes the cell balancing device to execute equalization of the subject battery cell so that the monitored voltage of the subject battery cell reaches the corrected target voltage.