Imperial College London
Alternate

ProfessorPaulMitcheson

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor in Electrical Energy Conversion
 
 
 
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Contact

 

+44 (0)20 7594 6284paul.mitcheson

 
 
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Assistant

 

Miss Guler Eroglu +44 (0)20 7594 6170

 
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Location

 

1112Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Howey:2014:10.1109/EVS.2013.6914960,
author = {Howey, DA and Yufit, V and Mitcheson, PD and Offer, GJ and Brandon, NP},
doi = {10.1109/EVS.2013.6914960},
title = {Impedance measurement for advanced battery management systems},
url = {http://dx.doi.org/10.1109/EVS.2013.6914960},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - We present a fast, low-cost approach to measure battery impedance 'on-line' in a vehicle across a range of frequencies (1-2000 Hz). Impedance measurement has promise for improving battery management since it is a very effective non-invasive method of diagnosing the internal state of an electrochemical cell. It is useful for estimating temperature, ageing, state of charge (SOC) and for fault detection. The aim of this paper is firstly to explore the usefulness of impedance for estimating SOC, focusing on lithium-ion iron phosphate (LFP) and nickel manganese cobalt oxide (NMC) cells, and secondly to demonstrate the performance of a low cost impedance measurement system that uses an existing motor drive similar to that of an electric vehicle to excite the battery current. We find that measurements made with this system are accurate to within a few per cent of results from an expensive, bulky commercial system. For SOC estimation in NMC cells, the charge transfer resistance and SEI layer resistance vary significantly with SOC. In LFP cells the parameter variation is much less obvious, although the double layer capacitance of the full pack may be a useful indicator of SOC.
AU  - Howey,DA
AU  - Yufit,V
AU  - Mitcheson,PD
AU  - Offer,GJ
AU  - Brandon,NP
DO  - 10.1109/EVS.2013.6914960
PY  - 2014///
TI  - Impedance measurement for advanced battery management systems
UR  - http://dx.doi.org/10.1109/EVS.2013.6914960
ER  -
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