Characterization of high-power lithium-ion batteries by electrochemical impedance spectroscopy. I. Experimental investigation

The influence of the operation conditions temperature and state of charge (SOC) on the performance of a commercial high-power lithium-ion cell is investigated by electrochemical impedance spectroscopy. Based on the results of several preliminary tests, measurements were run covering the complete ran...

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Bibliographic Details
Published in:Journal of power sources 2011-06, Vol.196 (12), p.5334-5341
Main Authors: Andre, D., Meiler, M., Steiner, K., Wimmer, Ch, Soczka-Guth, T., Sauer, D.U.
Format: Article
Language:English
Subjects:
Applied sciences
Automotive components
Charge
Correlation
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical impedance spectroscopy
Exact sciences and technology
Frequency ranges
Impedance
Lithium-ion batteries
Transport
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Summary:The influence of the operation conditions temperature and state of charge (SOC) on the performance of a commercial high-power lithium-ion cell is investigated by electrochemical impedance spectroscopy. Based on the results of several preliminary tests, measurements were run covering the complete range of automotive applications. The cell impedance is presented and analyzed. A strong nonlinear temperature correlation is shown for all frequency ranges. Although the ohmic resistance is nearly unaffected by variation in SOC, the mass transport impedance reduces from 100% to 60% SOC and increases significantly again for lower SOCs.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2010.12.102