INTERNAL IMPEDANCE MEASURING DEVICE FOR STORAGE BATTERY, AND INTERNAL IMPEDANCE MEASURING METHOD OF THE STORAGE BATTERY

摘要

PPROBLEM TO BE SOLVED: To provide an internal impedance measuring device of a storage battery that precisely measures and without requiring a large-scale device as well as complicating circuits, and to provide an internal impedance measuring method of the storage battery. PSOLUTION: The internal impedance measuring device of the storage battery includes a microprocessor for storing data for measuring the internal impedance of the storage battery, an applying means for measuring currents having a D/A converter for converting data by programs into periodic signals and a current amplifier for amplifying returned signals to apply the signals to a storage battery to be measured, a band-pass filter for passing signals of frequency components, in a specified range from among electromotive forces generated by the applied currents, an A/D converter for digitizing the passed signals, and a measuring means, having the microprocessor for determining the internal impedance from correlation of signals of frequency components in the specified range to be digitized. The internal impedance measuring method of the storage battery is used by the device. PCOPYRIGHT: (C)2006,JPO&NCIPI