Internal monitorization and evaluation of specific 18650 Li-ion cells parameters by using tailored optical fiber sensors

Lucca C. Matuck; Marta S. Ferreira; Jörg Bierlich; Micael S. Nascimento

doi:10.1117/12.3018327

20 June 2024 Internal monitorization and evaluation of specific 18650 Li-ion cells parameters by using tailored optical fiber sensors

Lucca C. Matuck, Marta S. Ferreira, Jörg Bierlich, Micael S. Nascimento

Author Affiliations +

Proceedings Volume 12999, Optical Sensing and Detection VIII; 1299909 (2024) https://doi.org/10.1117/12.3018327
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

In this study, a tailored hybrid sensing configuration integrating fiber Bragg grating and intrinsic Fabry-Perot interferometer is presented. It enables simultaneous discrimination and tracking of internal temperature and pressure changes within 18650 Li-ion batteries (LiBs). The battery undergoes rigorous cycling tests at different operating conditions and a comparison between them is presented. The optical fiber sensors instrumented into the LiB reveal, throughout overall cycling tests, a compelling correlation between internal and external temperature behavior. The application of systematic Incremental Capacity Analysis derivative curves during battery operation exposes crucial insights into the relationship between pressure and temperature physical parameters, and their electrochemical behavior. This optical sensing approach contributes in this way to a nuanced understanding of internal LiB dynamics, with implications for their optimizing performance and safety in diverse applications.

Conference Presentation

Citation Download Citation

Lucca C. Matuck, Marta S. Ferreira, Jörg Bierlich, and Micael S. Nascimento "Internal monitorization and evaluation of specific 18650 Li-ion cells parameters by using tailored optical fiber sensors", Proc. SPIE 12999, Optical Sensing and Detection VIII, 1299909 (20 June 2024); https://doi.org/10.1117/12.3018327

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