Journal
APPLIED MATHEMATICAL MODELLING
Volume 37, Issue 9, Pages 6244-6253Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.apm.2013.01.024
Keywords
Lithium batteries; Modeling; State-of-charge (SOC); Support vector machine (SVM); Support vector regression
Funding
- Spanish Science and Innovation Ministry (MICINN) [MICINN-10-IPT-370000-2010-15]
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State-of-charge (SOC) is the equivalent of a fuel gauge for a battery pack in an electric vehicle. Determining the state-of-charge becomes an important issue in all battery applications including electric vehicles (EV), hybrid electric vehicles (HEV) or portable devices. The aim of this innovative study is to estimate the SOC of a high capacity lithium iron phosphate (LiFePO4) battery cell from an experimental data-set obtained in the University of Oviedo Battery Laboratory (UOB Lab) using support vector machine (SVM) approach. The SOC of a battery cannot be measured directly and must be estimated from measurable battery parameters such as current, voltage or temperature. An accurate predictive model able to forecast the SOC in the short term is obtained. The agreement of the SVM model with the experimental data-set confirmed its good performance. (C) 2013 Elsevier Inc. All rights reserved.
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