Effect of external resistance on SOH measurement of LFP cells

Hsiang Fu Yuan, Lan-Rong Dung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Due to the small ohmic resistance, such as the LFP battery, off-line state-of-health (SOH) estimation based on ohmic techniques faces a great challenge on measurement difficulty. The inaccurate measurement result of the ohmic resistance can cause a severe SOH error. This paper studies the influences of battery external resistance on the off-line SOH estimations using different model parameters in a first-order equivalent battery model. The sensitivity function is introduced here to assess performances of these model parameters. The several test results show that the transient resistance has the good ability against the external resistance effect. The sensitivity results of the transient resistance are all less 0.05 in different test cases. In addition, the SOHs estimated by the transient resistance and full charge capacity (FCC) in 600 cycling tests have the smallest average error (6.9%).

Original languageEnglish
Title of host publicationProceedings of the 2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015
PublisherIEEE Computer Society
ISBN (Electronic)9781467381321
DOIs
StatePublished - 12 Jan 2016
EventIEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015 - Brisbane, Australia
Duration: 15 Nov 201518 Nov 2015

Publication series

NameAsia-Pacific Power and Energy Engineering Conference, APPEEC
Volume2016-January
ISSN (Print)2157-4839
ISSN (Electronic)2157-4847

Conference

ConferenceIEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015
CountryAustralia
CityBrisbane
Period15/11/1518/11/15

Keywords

  • Batteries
  • LFP
  • LiFePO4
  • state-of-health

Fingerprint Dive into the research topics of 'Effect of external resistance on SOH measurement of LFP cells'. Together they form a unique fingerprint.

  • Cite this

    Yuan, H. F., & Dung, L-R. (2016). Effect of external resistance on SOH measurement of LFP cells. In Proceedings of the 2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2015 [7380950] (Asia-Pacific Power and Energy Engineering Conference, APPEEC; Vol. 2016-January). IEEE Computer Society. https://doi.org/10.1109/APPEEC.2015.7380950