Patent Document ID: 20160187429
Application ID: 14979848
Patent Flag: 0

Claim One:
1. An apparatus for predictor a target power parameter of a secondary battery, the apparatus comprising: a first polarization voltage calculator that uses an equivalent circuit model of the secondary battery to calculate a present polarization voltage across the secondary battery at a specified prediction time, the equivalent circuit model comprising: a DC resistance model representing a DC resistance of the secondary battery; a reaction impedance model representing a reaction resistance of the secondary battery and having a nonlinear relationship between a first potential difference across the reaction resistance and a current flowing through the secondary battery, the nonlinearly relationship depending on a temperature of the secondary battery; and a diffusion impedance model representing a diffusion impedance of the secondary battery and comprising at least one RC parallel circuit, the at least one RC parallel circuit comprising a diffusion resistance and a diffusion capacitance connected in parallel to each other, the DC resistance model, the reaction impedance model, and the diffusion impedance model being connected in series to each other, the first polarization voltage calculator calculating the present polarization voltage across the secondary battery in accordance with a predetermined function defined among the present polarization voltage, the diffusion resistance, and the diffusion capacitance; a remaining voltage predictor that predicts, in accordance with a first continuous time-domain function, a future remaining voltage across the secondary battery at a future timing when a predetermined duration will have elapsed since the specified prediction time for the target power parameter, the first continuous time-domain function being defined among the diffusion resistance, the diffusion capacitance, the present polarization voltage, and the future remaining voltage; a second polarization voltage calculator that calculates, in accordance with a second continuous time-domain function, a future polarization voltage across the secondary battery at the future timing when the predetermined duration will have elapsed since the specified prediction time, the second continuous time-domain function being defined among the future polarization voltage, the diffusion resistance, and the diffusion capacitance; and a target power parameter predictor that predicts a value of the target power parameter at the future timing when the predetermined duration will have elapsed since the specified prediction time in accordance with: the future remaining voltage; the future polarization voltage; the first potential difference across the reaction resistance; and a second potential difference across the DC resistance model.