Characterizing Battery Behavior for Time-Dependent Currents

Author

Sritharan, Thuwaragan ; Yan, Daikang ; Dawson, Francis P. ; Lian, Keryn K.

Author_Institution

AMD, Boston, MA, USA

Volume

50

Issue

6

fYear

2014

fDate

Nov.-Dec. 2014

Firstpage

4090

Lastpage

4097

Abstract

Batteries connected to the dc grid are exposed to a variety of currents. We explore in this paper the response of the battery to commonly seen current waveforms to understand the impact of the converter on the battery. At the frequencies considered, the battery´s small-signal model is shown through impedance spectroscopy and ripple tests to be well represented by a pure resistor, and at dc currents over 2 C, Joule heating is shown to have a nonnegligible effect on the impedance. Furthermore, the amplitude of pulses that can be applied is shown to be governed by diffusion limits and the battery´s state of charge.

Keywords

heating; resistors; secondary cells; spectroscopy; Joule heating; battery behavior; battery state of charge; current waveforms; dc currents; impedance spectroscopy; pulses amplitude; resistor; time-dependent currents; Batteries; Discharges (electric); Electrodes; Impedance; Integrated circuit modeling; Mathematical model; Resistance; Batteries; electrochemical devices; electrochemical impedance; energy storage;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2014.2312533

Filename

6775291