INTERNAL IMPEDANCE MEASURING METHOD OF STORAGE BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a method comparatively inexpensively capable of performing more accurately temperature compensation of a measurement result of an internal impedance relative to each unit battery constituting a battery group. SOLUTION: In this internal impedance measuring method of the battery for measuring the internal impedance of each unit battery in the state where a load is connected to the battery group formed by connecting a plurality of unit batteries in series, the temperature of the unit battery is measured simultaneously with measurement of the internal impedance of each unit battery, and a temperature compensation coefficient is determined from the correlation between internal impedance data and temperature data of each unit battery in a fixed period, and the internal impedance of each unit battery is corrected to the value at a reference temperature. COPYRIGHT: (C)2005,JPO&NCIPI