Patent ID: 9207287
Filing Date: 2015-12-08
Classification: G01R,H01M,H02J,Y02E

Abstract:
1. An apparatus for estimating a voltage of a secondary battery including first and second cathode materials, the apparatus comprising: a voltage and current sensor unit configured to provide, when the secondary battery initiates charging or discharging, a measured operation initiating voltage of the second battery and, at time intervals during the charging or discharging of the secondary battery, a measured current of the secondary battery to the control unit; and a control unit configured to estimate the voltage of the secondary battery during charging or discharging of the secondary battery based on a circuit model of the secondary battery, the circuit model including: wherein the control unit estimates the voltage of the secondary battery during charging or discharging of the secondary battery based on the circuit model and by using the measured operation initiating voltage and the measured current of the secondary battery, and controls the charging or discharging of the secondary battery by using the estimated voltage of the secondary battery.