Patent ID: 6262577
Filing Date: 2001-07-17
Classification: G01R

Abstract:
A method of detecting properties and state of charge of a battery that has electrodes and an ionic conductor by comparing(a) a series of theoretical data of an electrical characteristic of the battery, obtained by combining at least one of an electron transportation model of the electrode, an ion transportation model of the electrode, an ion conduction model of the ionic conductor, and a model of an electrochemical reaction taking place in an interface between the electrode and the ionic conductor, with a potential model of the electrode, with(b) a series of measured data of the electrical characteristic of the battery;wherein the electrical characteristic is at least one selected from a group of charging characteristic, current rate dependency of charging voltage, temperature dependency of charging voltage, discharging characteristic, current rate dependency of discharging voltage, temperature dependency of discharging voltage, and complex impedance;wherein the property of the battery is a property of material that constitutes the battery, parameters of the theoretical data are determined so that the theoretical data approximates the measured data, and the property of the material is determined from the parameters.