The University of Southampton
University of Southampton Institutional Repository

Testing and characterisation of large high-energy lithium-ion batteries for electric and hybrid electric vehicles

Testing and characterisation of large high-energy lithium-ion batteries for electric and hybrid electric vehicles
Testing and characterisation of large high-energy lithium-ion batteries for electric and hybrid electric vehicles
This thesis considers the drivetrain and battery system requirements of Hybrid Electric Vehicles. The data herein proves that a series hybrid electric drivetrain with Lithium-ion batteries and plug-in recharge promises to be viable and sustainable. However, for mass production of series HEVs comprehensive performance characteristics and prediction of ageing behaviour of Lithium-ion batteries is essential but currently not available.
The main part of the thesis, following a graphical comparison of different energy storage solutions, is a detailed treatise on large Li-ion batteries. Construction and Li-ion working principles are summarised, together with several effects such as Peukert and memory effects, ageing of Li-ion cells, their temperature dependence and safety, and limits of charging/discharging.
Preliminary performance tests on 50 and 100 Ah Li-ion cells showed the necessity for a careful investigation of suitable reference conditions in order to achieve reproducibly precise results from repeated discharge/charge cycles. Then the main tests result in detailed graphs and tables of the discharge and charge characteristics. These main tests include effects of rate of discharge, energy-efficiency, temperature, resting time between test-cycles, hysteresis, ageing, and degradation. A new testing method that is based on the step response technique is suggested and investigated to whether it gives a meaningful but rapid measure of open circuit voltage and equivalent circuit models of the battery. Statistically significant theoretical models, equations and graphs are included.
The Appendix gives summaries of the author's seven main publications and presentations dealing with Systems Approach and five publications on Large Li-ion batteries, followed by most of these in full.
Doerffel, Dennis
2521109b-4e50-489d-83f1-cd260a63232c
Doerffel, Dennis
2521109b-4e50-489d-83f1-cd260a63232c

Doerffel, Dennis (2007) Testing and characterisation of large high-energy lithium-ion batteries for electric and hybrid electric vehicles. University of Southampton, School of Engineering Sciences, Doctoral Thesis, 235pp.

Record type: Thesis (Doctoral)

Abstract

This thesis considers the drivetrain and battery system requirements of Hybrid Electric Vehicles. The data herein proves that a series hybrid electric drivetrain with Lithium-ion batteries and plug-in recharge promises to be viable and sustainable. However, for mass production of series HEVs comprehensive performance characteristics and prediction of ageing behaviour of Lithium-ion batteries is essential but currently not available.
The main part of the thesis, following a graphical comparison of different energy storage solutions, is a detailed treatise on large Li-ion batteries. Construction and Li-ion working principles are summarised, together with several effects such as Peukert and memory effects, ageing of Li-ion cells, their temperature dependence and safety, and limits of charging/discharging.
Preliminary performance tests on 50 and 100 Ah Li-ion cells showed the necessity for a careful investigation of suitable reference conditions in order to achieve reproducibly precise results from repeated discharge/charge cycles. Then the main tests result in detailed graphs and tables of the discharge and charge characteristics. These main tests include effects of rate of discharge, energy-efficiency, temperature, resting time between test-cycles, hysteresis, ageing, and degradation. A new testing method that is based on the step response technique is suggested and investigated to whether it gives a meaningful but rapid measure of open circuit voltage and equivalent circuit models of the battery. Statistically significant theoretical models, equations and graphs are included.
The Appendix gives summaries of the author's seven main publications and presentations dealing with Systems Approach and five publications on Large Li-ion batteries, followed by most of these in full.

Text
Doerffel_D_thesis.pdf - Other
Download (5MB)

More information

Published date: March 2007
Organisations: University of Southampton

Identifiers

Local EPrints ID: 47951
URI: http://eprints.soton.ac.uk/id/eprint/47951
PURE UUID: d531db5a-b9a7-4939-b4c8-c77b6d286845

Catalogue record

Date deposited: 14 Aug 2007
Last modified: 13 Mar 2019 20:58

Export record

Contributors

Author: Dennis Doerffel

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×