锂离子电池内温度场健康状态分布式光纤原位监测技术研究  

Distributed Optical Fiber In-Situ Monitoring Technology for a Healthy Temperature Field in Lithium Ion Batteries

作　　者：周炜航 叶青[1,3] 叶蕾 李璇 曾朝智[2] 黄淳 蔡海文[1,3] 瞿荣辉[1,3] Zhou Weihang;Ye Qing;Ye Lei;Li Xuan;Zeng Chaozhi;Huang Chun;Cai Haiwen;Qu Ronghui(Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences,Shanghai 201800,China;Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai,201210,China;Centre of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing,100049,China)

机构地区：[1]中国科学院上海光学精密机械研究所空间激光传输与探测技术重点实验室,上海201800 [2]中国科学院低碳转化科学与工程重点实验室(中国科学院上海高等研究院),上海201210 [3]中国科学院大学材料与光电研究中心,北京100049

出　　处：《中国激光》2020年第12期146-155,共10页Chinese Journal of Lasers

基　　金：国家重点研发计划(2017YFB0405500);国家自然科学基金(61675216,61905262,61905260);上海中科神光项目(ZJ2018-ZD-010);上海张江国家自主创新示范区专项发展资金重大项目(二期)。

摘　　要：通过在锂离子电池内部埋入分布式光纤温度传感器,实现了对电池内温度场的实时分布式原位监测,并对其运行健康状态进行了预警和评估。根据锂离子电池结构设计模型,理论上模拟分析了不同运行环境下锂离子电池内温度场的分布状态和演化规律。基于此,选取特征温度点(正负极耳、中心点)优化传感器的布设位置,实现各种情况下温度场的准确测量,基于性价比给出传感器的优化组合,减少了传感器使用数量,降低了布设工艺的难度及解调设备的成本。在实验中埋入分布式级联的光纤光栅温度传感器,对模拟分析结果进行了验证。实验结果表明,随着外界环境温度的上升,各特征点温度都随之上升,但上升速率整体变小,而中心温度点具有较快的温升效应,实验结果与理论结果一致。该方法为未来大尺度锂离子电池集成组件健康状态的原位监测提供了技术参考和实施方案。Here, a distributed optical fiber temperature sensor is embedded in a lithium-ion battery to realize real-time distributed in-situ monitoring of the temperature field in the battery and the evaluating and forewarning of its operating health. The distribution state and evolution of the temperature field in lithium-ion batteries under different operating environments are analyzed theoretically according to the structure design model of the batteries. Accordingly, the characteristic temperature points(positive taps, negative taps, and center point) are selected to optimize the layout location of sensors for the accurate measurement of the temperature field and the optimization of the cost performance. Hence, the number of sensors used, the difficulty of the layout process and the cost of demodulation equipment can be reduced. Distributed cascaded fiber Bragg grating temperature sensors are employed in the experiment. The experimental results show that the temperature of each characteristic point slowly increases with the ambient temperature, while the central temperature point exhibits a rapid temperature increase, which are consistent with the theoretical results. The proposed method provides a technical reference and an implementation scheme for the in-situ monitoring of the health status of the integrated components of large-scale lithium-ion batteries in the future.

关 键 词：光纤光学 光纤原位监测技术 锂离子电池 内温度场 健康状态监测 

分 类 号：TN248[电子电信—物理电子学] TM930.1[电气工程—电力电子与电力传动]