Comparison of several methods for determining the internal resistance of lithium ion cells.

Academic Journal

Schweiger HG; Continental AG, Business Unit Hybrid and Electric Vehicles, Sickingenstrasse 42-46, 10553 Berlin, Germany. hans-georg.schweiger@continental-corporation.com
Obeidi O
Komesker O
Raschke A
Schiemann M
Zehner C
Gehnen M
Keller M
Birke P

Sensors (Basel, Switzerland) [Sensors (Basel)] 2010; Vol. 10 (6), pp. 5604-25. Date of Electronic Publication: 2010 Jun 03.

English

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.