Kyoto University

Calsonic Kansei Corporation

Keio University

Marelli Corporation

Ichiro Maruta

Shuichi Adachi

Atsushi Baba

Takahiro Kawaguchi

Kensuke Osamura

Junpei Katashiba

Risako Sasaki

A system identification method executed by a system identification device that estimates a response of a system having a current flowing in a battery as input and an overvoltage of the battery as output, comprises: a first step of identifying the system by applying a model of the battery including a FIR model and an ARX model to the system, based on time series data of each of the current flowing in the battery and the overvoltage of the battery in a predetermined period; and a second step of estimating, based on the model of the battery, the overvoltage of the battery output from the system at an estimation target time after an input start time in the case where no current is input before the input start time and the current is input to the system from the input start time onwards.

System identification method and system identification device

A device for estimating parameters of battery capable of improving, by using simple calculations, estimation accuracy of a parameter and the like of a battery equivalent circuit model will be provided. The device for estimating parameters of battery for estimating the parameter of a battery () includes: a battery equivalent circuit model (A) including resistance and a capacitor as the parameter; a logarithmic conversion parameter value estimation unit (B) for sequentially estimating, by using a logarithmic conversion parameter value serving as a state variable obtained by carrying out logarithmic conversion on the parameter, the logarithmic conversion parameter value with a Kalman filter () from a state equation and an output equation, based on a charging/discharging current and a terminal voltage those being detected; and an inverse logarithmic conversion unit (C) for obtaining, from the logarithmic conversion parameter value, an estimated parameter value serving as an antilogarithm corresponding to the logarithmic conversion parameter value.

Device for estimating parameters of battery, and estimation method

An apparatus and method for battery parameter estimation estimate the parameters of a battery equivalent circuit model while reducing the computation load. The apparatus includes a charge/discharge current detector () that detects a charge/discharge current value of a battery (); a terminal voltage detector () that detects a terminal voltage value of the battery (); and an estimator () that estimates, based on the charge/discharge current value and the terminal voltage value, parameters in a battery equivalent circuit model () that approximates the Warburg impedance of the battery ().

Battery parameter estimation device and parameter estimation method

Growing community of inventors

Kyoto, Japan

Ichiro Maruta