Real-time monitoring internal temperature of lithium-ion battery using embedded fiber Bragg gratings

Feixia Huang, Bowen Gu, Qiang Wu*, Hong Yang, Yingying Hu, Juan Liu, Yue Fu, Xing-Dao He, Haimeng Wu, Jing Jiang, Ghanim Putrus, Zabih Ghassemlooy, Jinhui Yuan, Bin Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This study proposes a method for real-time monitoring of lithium-ion battery (LiB) internal temperature through the temperature response of embedded fiber Bragg grating (FBG) sensor. This approach overcomes the limitations of most methods that can only detect the external temperature at limited places by providing the advantages of sensing both internal temperature and external temperature at multiple points simultaneously for precise condition monitoring. In addition, a numerical LiB cell model was developed to investigate the heat generation and temperature gradient using the finite element analysis method. The outcomes show that this model can be used to predict the temperature with less than 5% discrepancy (1.5℃) compared with experimental results. Thereby, this proposed technique can be effectively used to monitor the safety and state of health of LiB, and other types of rechargeable batteries in real-time.
Original languageEnglish
JournalChinese Optics Letters
Issue number9
Publication statusAccepted/In press - 13 May 2024

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