Hyundai Mobis has announced a significant breakthrough in electric vehicle (EV) safety technology with the development of a next-generation system designed to prevent thermal runaway in battery cells. The new innovation allows fires to be extinguished at the cell level within five minutes of ignition, aligning with and potentially exceeding evolving global safety standards.
Unlike conventional systems that rely on heat-resistant materials to delay thermal runaway, Hyundai Mobis’ solution actively prevents the spread of heat to adjacent cells. The newly developed Battery System Assembly (BSA) integrates a fire extinguishing device, a robust battery case, and an intelligent battery management system (BMS). This combination allows real-time monitoring of battery temperature, voltage, and internal pressure, enabling precise and swift deployment of the extinguishing agent.
The fire suppressant, five times the capacity of a standard 3.3 kg home extinguisher, is noted for its excellent cooling, insulation, and eco-friendly properties. The software component features redundant logic and multiple safety layers to enhance decision-making during thermal anomalies.
Hyundai Mobis has filed three domestic and international patents covering key components, including the battery case, fire extinguishing mechanisms, and high-pressure spraying pipes.
In a related development, the company is working to commercialize a new pulsating heat pipe material made from aluminum alloy and refrigerant, designed to regulate internal battery temperature, particularly during fast charging.
Vice President Park Yong Jun of the Battery System R&D Group emphasized the growing need for stringent battery safety measures and affirmed the company’s commitment to delivering globally competitive EV safety solutions.
