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

fYear

2014

fDate

1-4 June 2014

Firstpage

1641

Lastpage

1646

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics (ISIE), 2014 IEEE 23rd International Symposium on

Conference_Location

Istanbul

Type

conf

DOI

10.1109/ISIE.2014.6864861

Filename

6864861