Project News & Activities
New publication from the InnoBMS project: Impedance-based methodology for early detection of Thermal Runaway in Li-ion batteries
As part of the InnoBMS project, a new article has recently been published, titled “Impedance-based Thermal Runaway early detection methodology for Lithium-Ion batteries”, on the International Journal of Electrical Power & Energy Systems.
In this work, a novel approach is presented, to improve battery safety through the use of Electrochemical Impedance Spectroscopy (EIS). The study investigates how tracking battery impedance during the onset of a Thermal Runaway (TR) event can enable its early detection and thus enhance the State-of-Safety estimation in Li-ion batteries.
The research demonstrates that EIS can identify TR events earlier than existing gas-sensing detection methods. Through a combination of Accelerating Rate Calorimetry (ARC) tests and abuse testing, the methodology proves effective for both fast-paced and slow-paced TR scenarios. Results show that:
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The impedance-based method detected TR 15 hours before explosion in slow-paced events.
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It also outperformed commercial gas-sensing methods in rapid TR events, providing a warning time that complies with R100 Rev3 regulations (at least 5 minutes).
This work marks an important step towards safer and more reliable Battery Management Systems (BMS) for automotive and stationary applications.
Read the article here