Investigation of the polarization effect in lithium iron phosphate battery for electric vehicles

The polarization effect is an significant and complex phenomenon of the lithium iron phosphate battery. An electrical method is applied in analysis of the effect. Based on a equivalent circuit model, a modified hybrid pulse power characterization (HPPC) test is used for identification of ohmic resis...

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Bibliographic Details
Published in2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific) pp. 1 - 5
Main Authors Baihua Zhang, Man Chen, Daiming Yang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2014
Subjects
Batteries
Degradation
Discharges (electric)
Electric potential
electric vehicle
Integrated circuit modeling
lithium iron phosphate battery
ohmic resistance
polarization effect
polarization resistance
Resistance
System-on-chip
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Summary:The polarization effect is an significant and complex phenomenon of the lithium iron phosphate battery. An electrical method is applied in analysis of the effect. Based on a equivalent circuit model, a modified hybrid pulse power characterization (HPPC) test is used for identification of ohmic resistance and polarization resistance, which are two parameters reflecting the polarization degree. The analysis based on experiment data shows different polarization resistance when the state-of-charge (SOC), current magnitude or cell degradation changes. The polarization effect can be taken in advantage to calculate the equilibrium potential and enhance the instantaneous power.
DOI:10.1109/ITEC-AP.2014.6941178