Comparison of Several Methods for Determining the Internal Resistance of Lithium Ion Cells

Sensors

Hans-Georg Schweiger²  Ossama Obeidi²  Oliver Komesker²  André Raschke²  Michael Schiemann²  Christian Zehner³  Markus Gehnen¹  Michael Keller² 

[1] Georg Agricola University of Applied Sciences, Herner Strasse 45, 44787 Bochum, Germany; E-Mails:;Continental AG, Business Unit Hybrid and Electric Vehicles, Sickingenstrasse 42-46, 10553 Berlin, Germany; E-Mails:;University of Applied Sciences Brandenburg, Magdeburger Strasse 50, 14770 Brandenburg, Germany; E-Mails:

关键词: internal resistance;    impedance;    lithium-ion-cell;    AC resistance;    DC resistance;   

DOI  :  10.3390/s100605604

来源: mdpi

【 摘 要 】

The internal resistance is the key parameter for determining power, energy efficiency and lost heat of a lithium ion cell. Precise knowledge of this value is vital for designing battery systems for automotive applications. Internal resistance of a cell was determined by current step methods, AC (alternating current) methods, electrochemical impedance spectroscopy and thermal loss methods. The outcomes of these measurements have been compared with each other. If charge or discharge of the cell is limited, current step methods provide the same results as energy loss methods.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.