In Situ Optical Fiber Sensing of Internal Temperature Evolution during Lithium-Ion Battery Cycling.

ABSTRACT: The internal temperature of high-capacity lithium-ion batteries (LiBs) plays a crucial role in triggering thermal runaway. Current research on battery thermal runaway primarily relies on external temperature sensors, which are unable to provide real-time temperature distribution data from various sections within the battery cells. Consequently, early detection of thermal runaway in batteries is hindered. To address this limitation, this study investigates arrayed fiber Bragg grating sensors (AFBGs) positioned between two cells to continuously monitor the temperature distribution across different cell sections during operation. The results indicate that in battery charge-discharge tests conducted at rates of 0.2, 0.5, and 0.75 P, the maximum thermal gradient along the cell's vertical axis (

SUBMITTER: Zeng F 

PROVIDER: S-EPMC12529180 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature