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In a significant technological breakthrough aimed at preventing thermal runaway in electric vehicles, Hyundai Mobis has developed an advanced battery safety system. The new technology is capable of instantly extinguishing flames in the event of a fire in any battery cell by releasing a fire extinguishing agent. This is the first such innovation that reacts before the heat spreads to adjacent cells, effectively preventing thermal runaway.
Until now, battery safety measures primarily relied on heat-resistant materials to delay thermal runaway. However, Hyundai Mobis has taken it a step further by designing a solution to stop it from occurring altogether.
The Battery System Assembly (BSA) developed by Hyundai Mobis includes a Battery Management System (BMS), hardware components such as a fire extinguishing device and battery case, and intelligent software logic that controls the entire mechanism. The system's sensors monitor real-time data including battery temperature, voltage, and internal pressure. If any abnormality is detected, the system calculates the exact location and amount of extinguishing agent to be released and triggers the fire suppression device.
The fire extinguishing agent used in this system is five times more powerful than a 3.3-kilogram household fire extinguisher. It is highly effective in cooling, insulation, and permeation, while also being safe for both the environment and human health.
Hyundai Mobis has applied for three domestic and international patents for this new system, covering the battery case, extinguishing device, piping, and high-pressure spray design.
“As large electric vehicles with extended ranges are being introduced, battery safety standards are becoming increasingly stringent,” said Park Yong Jun, Vice President of the Battery System R&D Group at Hyundai Mobis. “We aim to integrate hardware and software to develop next-generation battery systems that exceed global safety standards and lead the international market.”
