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Individual Cell-Level Temperature Monitoring of a Lithium-Ion Battery Pack

Alcock, Keith M.; González-Vila, Álvaro; Beg, Mustehsan; Vedreño-Santos, Francisco; Cai, Zuansi; Alwis, Lourdes S. M.; Goh, Keng


Álvaro González-Vila

Lourdes S. M. Alwis


The work described herein details the deployment of an optical fibre strand with five fibre Bragg grating (FBG) sensors for individual cell-level temperature monitoring of a three-cell lithium-ion battery pack. A polymer guide tube with 3D printed plinths is employed, resulting in high precision temperature readings with an average error of 0.97 °C, 1.33 °C, and 1.27 °C for FBG sensors on each battery cell, surpassing traditional thermocouple and platinum resistance sensors in some circumstances. The temperature response of FBGs positioned between battery cells demonstrates that, in addition to sensing temperature at the cell level, temperature data can be effectively acquired between cells, suggesting that FBGs may be used to monitor the heat radiated from individual cells in a battery pack.

Journal Article Type Article
Acceptance Date Apr 25, 2023
Online Publication Date Apr 26, 2023
Publication Date 2023
Deposit Date May 17, 2023
Publicly Available Date May 17, 2023
Journal Sensors
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 23
Issue 9
Article Number 4306
Keywords Article, FOS, FBG, Bragg, lithium-ion, battery, temperature monitoring, guide tube


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