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Nanoparticle-Coated Optical Hydrogen Sensor for Early Gas Detection of Lithium-Ion Battery Failure
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Nanoparticle-Coated Optical Hydrogen Sensor for Early Gas Detection of Lithium-Ion Battery Failure
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Journal Article
Nanoparticle-Coated Optical Hydrogen Sensor for Early Gas Detection of Lithium-Ion Battery Failure
2025
Overview
This research investigates the use of a fiber optic sensor for detecting hydrogen gas during a thermal runaway of lithium-ion batteries (LIBs). Timely detection of thermal runaway in LIBs, particularly in storage and logistics, is crucial for effective safety management and preventing the escalation of incidents to adjacent cells. The sensors employed in this study utilize fiber Bragg grating (FBG) technology. The FBG sensors are coated with palladium nanoparticles, enabling the detection of hydrogen concentrations up to 5%. In abuse tests, the sensors successfully identified hydrogen emissions. Cross-sensitivity effects were observed during a secondary test and were thoroughly investigated. These interferences were found to be primarily caused by carbon monoxide (CO), a common byproduct of battery venting. While the presence of CO can interfere with hydrogen detection, both signals remain independently valuable as indicators of cell malfunction. This dual-response behavior enhances the robustness of fault detection under real-world battery failure scenarios.
