Experimental Validation of Lithium Ion Batteries Thermal Runaway Online Monitoring Based on Gas Viscosity
Lithium ion battery thermal runaway online monitoring methods based on Poiseuille's law were presented theoretically and experimental validation was implemented.Gas detection test platform of Lithium ion battery thermal runaway under external heating conditions was built to monitor and record the typical thermal runaway process.Temperature change on the outer sur-face of the battery was recorded.Gas ejected from the battery was collected and measured using gas viscosity measurement system.Regardless of whether combustion occurred or not,the ex-perimental results of batteries at SOCs of 60%and 20%both indicated that viscosity of mixed gas variation was an effective characteristic parameter and workable solution in online monitoring of battery thermal runaway behavior.Verification tests shed light on the application feasibility of gas viscosity in early detection and warning of lithium ion battery thermal runaway.
Lithium ion batteriesthermal runawaygas viscosityreal time monitoringpres-sure drop response
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