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1. (WO2017179175) ESTIMATION DEVICE, ESTIMATION PROGRAM, AND CHARGING CONTROL DEVICE

Pub. No.:    WO/2017/179175    International Application No.:    PCT/JP2016/062022
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Fri Apr 15 01:59:59 CEST 2016
IPC: G01R 31/36
Applicants: FUJITSU LIMITED
富士通株式会社
Inventors: IKEDA, Kazuto
池田和人
Title: ESTIMATION DEVICE, ESTIMATION PROGRAM, AND CHARGING CONTROL DEVICE
Abstract:
An estimation device is provided with: a measurement unit for measuring a measurement current and measurement terminal voltage of a rechargeable battery at a prescribed sampling period; a determination unit for making DC resistance parameters for an equivalent circuit model of the battery values obtained on the basis of the measurement current and measurement terminal voltage by dividing the measurement terminal voltage differences at the sampling intervals by the measurement current differences; a calculation unit for estimating the state of charge of the battery and a predicted terminal voltage with a Kalman filter using element parameters including the DC resistances of the equivalent circuit model and calculating the difference between the measurement terminal voltage and the predicted terminal voltage; and a correction unit for correcting the state of charge on the basis of the difference and the Kalman gain of the Kalman filter.