Characterisation, modelling and management of lithium-sulphur batteries for spacecraft applications
Characterisation, modelling and management of lithium-sulphur batteries for spacecraft applications
复制标题
用于航天器应用的锂硫电池的表征、建模和管理
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Claire Parfitt
中科院分区：
文献类型：
--
作者：
Claire Parfitt
锂硫电对具有如此高的理论能量密度，原则上，
可以为发射航天器节省大量的重量和成本。原则
这项研究的目的是确定锂硫电池技术在太空中的适用性
通过考虑性能、建模和电子的所有领域，行业应用
保护要求。
本论文分为三个主要方面。首先，在研究了背景材料后，
详细分析了锂硫电化学的研究现状。具有重要
重要的是要有一个清楚的了解电池的电化学和化学
相互作用，因为它们可以用来解释电池的性能特征，
中求进工作总
在完成电化学分析后，论文接着描述了一组
电气和热特性测试，其结果被用来建立一个新的
锂硫电池的等效电路模型。等效电路建模方法是
选择它主要是因为它易于实现为一个完整的电力系统模型，并为它的
对未来细胞变化的适应性，这两者对于预期的
应用程序.由此产生的模型使用电、热和“分裂容量”域，
成功预测电池性能。
然后分析进一步的表征测试结果，以指定
锂硫电池管理系统的电气保护要求，
航天工业应用。确定了锂硫电池具有安全性和防护性
需要超过锂离子电池的需求，以及需要坚固的外壳
结构，降低了电池组的能量密度。
这项工作的结论是，尽管Li-S电池对未来充满希望，
电池的退化特性的当前状态阻止它与
目前规格的锂离子电池
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