A SYSTEM AND METHOD FOR DETERMINING STATE OF CHARGE OF A BATTERY

摘要

A novel method and system for determining state of charge of a battery (SOC) is disclosed wherein the direct method and the indirect method are not used at the same time, but alternately as indicated by battery current status. The method of the invention compensates for the exiting modeling errors and parameter estimation errors to provide an accurate SOC estimation. The method of the invention computes the DC offset and the battery capacitance to compensate for the exiting modeling errors and parameter estimation errors.