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Investigating the aging effect of current ripple on lithium-ion cells
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-0108-1872
KTH, School of Electrical Engineering (EES), Electric power and energy systems.ORCID iD: 0000-0002-9481-7366
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-9392-9059
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0001-9203-9313
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2015 (English)In: ECS Transactions, Electrochemical Society, 2015, Vol. 69, no 18, 101-106 p.Conference paper, Published paper (Refereed)
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Abstract [en]

We have built an experimental setup which exposes twelve cells to a well-defined ripple current. It consists of a system for cycling high capacity cells in parallel with a triangular current waveform superimposed on top of the direct current. The frequency of the waveform is variable up to 50 Hz, and the sum of the DC and AC components can have a magnitude of -40 A to 40 A. Current is measured over a 500 μω shunt resistor. The voltage and current of each cell is read simultaneously at a sample rate up to 4 MS/s, allowing for precise impedance measurements even for high frequency harmonics. The cells are cycled at 40 °C. The experiment has been designed to eliminate indirect effects of the AC harmonics as far as possible. This system is being used to test whether or not AC harmonics affect Li-ion aging.

Place, publisher, year, edition, pages
Electrochemical Society, 2015. Vol. 69, no 18, 101-106 p.
Series
ECS Transactions, ISSN 1938-5862
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-187428DOI: 10.1149/06918.0101ecstScopus ID: 2-s2.0-84959329828ISBN: 978-160768539-5 (print)OAI: oai:DiVA.org:kth-187428DiVA: diva2:930252
Conference
Conference of Symposium on Joint General Session: Batteries and Energy Storage -and- Fuel Cells, Electrolytes, and Energy Conversion - 228th ECS Meeting ; Conference Date: 11 October 2015 Through 15 October 2015
Note

QC 20160523

Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2016-05-23Bibliographically approved

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