Distributed thermal monitoring of lithium ion batteries with optical fibre sensors
Distributed thermal monitoring of lithium ion batteries with optical fibre sensors
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DOI：
10.1016/j.est.2021.102560
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发表时间：
2021-04-29
影响因子：
9.4
通讯作者：
Marco, James
中科院分区：
文献类型：
--
作者：
Yu, Yifei;Vergori, Elena;Marco, James
锂离子电池的实时温度监测在学术界和工业界都被广泛认为是电池系统可靠和安全运行的基本要求。这对于在许多汽车或网格存储应用中使用的更大格式的储袋单元来说尤其明显。传统的温度测量方法，例如将单个传感器安装在电池表面的离散位置，可能会产生不完整的信息。在这项研究中，一种新的基于瑞利散射的光纤传感技术被提出并展示出来，它提供了一种适合于锂离子电池使用的分布式、实时和准确的温度测量。通过实验研究了A5大小储存袋电池在充放电过程中在各种环境温度和负载电流范围内的热行为。分布式光纤传感器(DFOS)被用来测量运行过程中电池表面的面内温差和电池最热区域的移动，其中温差是不同测量点之间的温差。值得注意的是，DFOS的结果突出表明，最大面内温差被发现比使用传统的热电偶方法测量的高出307%。
Real-time temperature monitoring of li-ion batteries is widely regarded within the both the academic literature and by the industrial community as being a fundamental requirement for the reliable and safe operation of battery systems. This is particularly evident for larger format pouch cells employed in many automotive or grid storage applications. Traditional methods of temperature measurement, such as the inclusion of individual sensors mounted at discrete locations on the surface of the cell may yield incomplete information. In this study, a novel Rayleigh scattering based optical fibre sensing technology is proposed and demonstrated to deliver a distributed, real-time and accurate measure of temperature that is suitable for use with Li-ion pouch cells. The thermal behaviour of an A5-size pouch cell is experimentally investigated over a wide range of ambient temperatures and electrical load currents, during both charge and discharge. A distributed fibre optical sensor (DFOS) is used to measure both the in-plane temperature difference across the cell surface and the movement of the hottest region of the cell during operation, where temperature difference is the difference of temperature amongst different measuring points. Significantly, the DFOS results highlight that the maximum in-plane temperature difference was found to be up to 307% higher than that measured using traditional a thermocouple approach.