On-Load Impedance Measurements on Automotive Lithium-Ion Cells

authored by

Simon Calles, Jakob Ulke, Paul Heitjans, Alexander Börger

Abstract

The contribution presents examples for electrochemical impedance spectroscopy data taken on automotive lithium-ion battery cells. Discharge was done with the help of an external load. The measurements were done with an initial state of charge of about 97 %, at 23 °C and from 5000–0.1 Hz. Spectra were fitted with an equivalent circuit containing two RC elements and an inductance. For load currents up to 20 A and in certain regions of the used frequency range, it is possible to measure impedance spectra also under load that almost coincide with load-free spectra.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry

External Organisation(s)

Volkswagen AG

Type

Article

Journal

Chemie-Ingenieur-Technik

Volume

94

Pages

599-602

No. of pages

4

ISSN

0009-286X

Publication date

22.03.2022

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Chemistry(all), Chemical Engineering(all), Industrial and Manufacturing Engineering

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1002/cite.202100061 (Access: Closed)