AC Impedance Characterization and Life Testing of Lithium-Ion Batteries
Date Published: 1999-04-06
Paper Number:1999-01-1402
DOI: 10.4271/1999-01-1402
Citation:
Fellner, J. and Loeber, G., "AC Impedance Characterization and Life Testing of Lithium-Ion Batteries," SAE Technical Paper 1999-01-1402, 1999, doi:10.4271/1999-01-1402.
As part of the DoD/NASA Lithium-Ion and More-Electric Aircraft (MEA) development programs, in-house life-testing and performance characterization of lithium-ion batteries of sizes 1-20 amp-hours (Ah) were performed. Using AC impedance spectroscopy, the impedance behavior of lithium-ion cells with respect to temperature, cycle number, electrode, and state-of-charge was determined. Cell impedance is dominated by the positive (cathode) electrode, increases linearly with cycle number, and exponentially increases with decreasing temperature. From cell performance testing, we have seen the cell behavior is extremely sensitive to the ambient temperature. Preliminary battery performance results as well as AC impedance and life cycle test results are presented below.
Purchase more technical papers and save! With TechSelect,
you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
Learn more >
