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Characterisation, modelling and management of lithium-sulphur batteries for spacecraft applications
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Parfitt, Claire E. (2012) Characterisation, modelling and management of lithium-sulphur batteries for spacecraft applications. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b2684478~S1
Abstract
The lithium-sulphur couple has such a high theoretical energy density that, in principle, it
could contribute significant weight and cost savings for launching a spacecraft. The principle
aim of this study was to determine the suitability of lithium-sulphur cell technology for space
industry applications by considering all areas of performance, modelling and electronic
protection requirements.
This thesis is split into three main areas. Firstly, after examining the background material, the
current state of the lithium-sulphur electrochemistry is analysed in detail. It is of great
importance to have a clear understanding of the cell’s electrochemical and chemical
interactions as they can be used to explain the performance characteristics of the cell later in
the work.
On completion of the electrochemical analysis the thesis then goes on to describe a set of
electrical and thermal characterisation tests, the results of which are used to establish a novel
equivalent circuit model of a Li-S battery. The equivalent circuit modelling method was
chosen mainly for its ease of implementation into a full power system model and for its
adaptability to future cell variations, both of which are important for the intended
application. The resultant model uses electrical, thermal and “split capacity” domains to
successfully predict cell performance.
Further characterisation testing results are then analysed with a view to specifying the
electrical protection requirements of a Li-S battery management system suitable for different
space industry applications. It was determined that the Li-S cell has safety and protection
needs that exceed that of lithium-ion batteries, as well as requiring a robust housing
structure, reducing the energy density of the battery pack.
The conclusion of the work is that, although the Li-S cell holds promise for the future, the
current state of the cell’s degradation characteristics prevents it from competing with
lithium-ion cells in its current format
Item Type: | Thesis (PhD) | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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Library of Congress Subject Headings (LCSH): | Lithium sulfur batteries, Space vehicles -- Batteries -- Research, Lithium ion batteries | ||||
Official Date: | November 2012 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | School of Engineering | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Crofts, Bill ; Covington, J. A. | ||||
Extent: | xxvi, 308 leaves : illustrations | ||||
Language: | eng |
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