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

Abstract

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.

Citation

Alcock, K. M., González-Vila, Á., Beg, M., Vedreño-Santos, F., Cai, Z., Alwis, L. S. M., & Goh, K. (2023). Individual Cell-Level Temperature Monitoring of a Lithium-Ion Battery Pack. Sensors, 23(9), Article 4306. https://doi.org/10.3390/s23094306

• 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
• DOI: https://doi.org/10.3390/s23094306
• Keywords: Article, FOS, FBG, Bragg, lithium-ion, battery, temperature monitoring, guide tube