Title :
Diagnostic methods for the evaluation of the state of health (SOH) of NiMH batteries through electrochemical impedance spectroscopy
Author :
Galeotti, Matteo ; Giammanco, Cheryl ; Cina, Lucio ; Cordiner, Stefano ; Di Carlo, A.
Author_Institution :
Dept. of Electron. Eng., Univ. of Rome Tor Vergata, Rome, Italy
Abstract :
In this work, we have characterized single nickel metal hydride (NiMH) cells with Electrochemical Impedance Spectroscopy (EIS) technique to determine online the state of the batteries. Studying the variations of the obtained impedance spectra at specific frequencies, which correspond to part of the spectra that change mostly during the charge and discharge processes of the batteries, we have constructed and interpreted diagnostic diagrams through a mathematical model based on Dempster-Schafer Theory of Evidence in order to determine the SOH.
Keywords :
electrochemical impedance spectroscopy; inference mechanisms; nickel compounds; secondary cells; uncertainty handling; Dempster-Schafer Theory of Evidence; EIS technique; NiMH batteries; SOH diagnostic methods; battery charge process; battery discharge process; diagnostic diagrams; electrochemical impedance spectroscopy; mathematical model; nickel metal hydride cells; state of health diagnostic methods; Aging; Batteries; Battery charge measurement; Discharges (electric); Hybrid electric vehicles; Impedance; System-on-chip;
Conference_Titel :
Industrial Electronics (ISIE), 2014 IEEE 23rd International Symposium on
Conference_Location :
Istanbul
DOI :
10.1109/ISIE.2014.6864861
