Patent ID: 11876397
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 11:
12. The method for controlling step charging of the secondary battery according to claim 9,
wherein in the (c) step, the polarization voltage is determined according to an equation below:

dVpol[k]=Vcell[k]−VOCV[k]−I[k]R0 

where k is a time index, dVpol[k] is a polarization voltage, Vcell[k] is a voltage estimated by an extended Kalman filter or a measured voltage, VOCV[k] is an OCV, R0 is an internal resistance of the secondary battery, and I[k] is a charging current of the secondary battery.