Patent ID: 8655612

Claim:
A battery model identification method of a battery capable of being discharged and charged, the method comprising the steps of: setting parameters of a battery model of the battery, the parameters of the battery model including a plurality of resistance components and capacitance components; inputting an electric current into the battery; measuring a terminal voltage of the battery when the electric current is inputted; system-identifying the battery model based on the electric current inputted to the battery and the measured terminal voltage; calculating frequency characteristics of the battery; and estimating the parameters of the battery model based on the calculated frequency characteristics of the battery, wherein the electric current is produced by M-sequence signals with predetermined different frequency components, wherein sampling frequencies utilized in said measuring of the terminal voltage are shifted according to a shift of the M-sequence signals, and wherein said system-identifying of the battery model identifies the battery model (i) by extracting and synthesizing data on respective frequency responses in a predetermined frequency range and (ii) based on the data on the respective frequency responses.