Evaluating Real-Life Performance of Lithium-Ion Battery Packs in Electric Vehicles
2012 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, Vol. 159, no 11, A1856-A1860 p.Article in journal (Refereed) Published
In regard to the increasing market launch of plug-in hybrid electric vehicles (PHEVs), understanding battery pack performance under electric vehicle (EV) operating conditions is essential. As lifetime still remains an issue for battery packs, it is a necessity to monitor the battery pack's state-of-health (SOH) on-board. Standard laboratory performance tests for health evaluation do not apply since operation interruptions and additional testing equipment are out of the question during ordinary EV usage. We suggest a novel methodology of performance estimation from real-life battery data. On the basis of battery pack data collected during PHEV operation, a support vector machine model capturing battery behavior characteristics is constructed. By virtually testing this battery model, access to standard performance evaluation figures can be gained. The SOH indicator "10 s discharge resistance" as known from hybrid pulse power characterization (HPPC) tests is chosen to exemplify how performance can be followed over a year.
Place, publisher, year, edition, pages
2012. Vol. 159, no 11, A1856-A1860 p.
Management-Systems, Cell, Charge, State, Operation, Networks
IdentifiersURN: urn:nbn:se:kth:diva-104282DOI: 10.1149/2.047211jesISI: 000309107200017ScopusID: 2-s2.0-84875581895OAI: oai:DiVA.org:kth-104282DiVA: diva2:565044
QC 201507162012-11-062012-10-312015-09-14Bibliographically approved