Evaluating real-life performance of lithium-ion battery packs in electric vehicles
2012 (English)In: ECS Transactions 2012, Electrochemical Society, 2012, Vol. 41, no 32, 1-11 p.Conference paper (Refereed)
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 performance tests for health evaluation do not apply since operation interruptions and additional testing equipment are beyond 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 is constructed that serves as source for performance evaluation figures. The SOH indicator "10 s discharge resistance" as known from hybrid pulse power characterization (HPPC) tests is chosen to exemplify how performance degradation can be followed over a year.
Place, publisher, year, edition, pages
Electrochemical Society, 2012. Vol. 41, no 32, 1-11 p.
, ECS Transactions, ISSN 1938-5862 ; 41
Discharge resistance, Lithium-ion battery, Performance degradation, Performance estimation, Plug-in hybrid electric vehicles, Real-life performance, Standard performance, Support vector machine models, Electrochemical properties, Electric vehicles
Other Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-131338DOI: 10.1149/1.3698126ScopusID: 2-s2.0-84879352265ISBN: 978-160768331-5OAI: oai:DiVA.org:kth-131338DiVA: diva2:656384
Challenges for Transportation Batteries - 220th ECS Meeting; Boston, MA; United States; 9 October 2011 through 14 October 2011
QC 201310152013-10-152013-10-142016-04-25Bibliographically approved