• The novel system stops heat from spreading to nearby cells, suppressing fires swiftly by deploying a fire suppressant within five minutes of ignition.
• With many nations advocating for mandatory thermal runaway prevention, this technology is poised to become a leading safety solution in the international market.
• The company has filed for three patents, including a battery case design, and is actively improving the battery system through innovations like anti-overheating materials.

SEOUL, South Korea, April 14, 2025 — Advancements are being made in technology designed to prevent thermal runaway in electric vehicles. On April 14th, Hyundai Mobis (KRX 012330) announced the successful development of a new technology capable of immediate fire suppression by spraying a fire extinguishing agent when a battery cell ignites. This system is the first of its kind to prevent thermal runaway by inhibiting heat transfer to adjacent cells.

Hyundai Mobis’s design goes beyond merely delaying thermal runaway with heat-resistant materials; it aims to prevent it from occurring altogether. Major regions including Europe, China, and India, have mandated a minimum five-minute delay for thermal runaway after initial battery cell ignition. Some are further tightening regulations to prevent thermal transfer. Consequently, Hyundai Mobis’s battery system assembly (BSA), featuring cell-level fire extinguishing, is expected to gain prominence as a next-generation safety technology on the global stage.

The BSA developed by Hyundai Mobis includes a battery management system (BMS), hardware components such as a fire extinguishing device and battery case, and software logic for controlling these elements.

Using real-time sensor data, the system assesses battery temperature, voltage, and internal pressure to identify anomalies. It then pinpoints the specific location for extinguishing agent deployment and activates the fire extinguishing device.

The software is engineered for rapid and precise decision-making in response to physical changes within the battery system. Hyundai Mobis’s decision logic incorporates multiple safety mechanisms and a redundant algorithm structure for enhanced reliability.

The battery system holds a fire extinguishing agent with five times the capacity of a standard 3.3-kilogram home extinguisher. This agent boasts excellent cooling, insulation, and permeability, and is environmentally and biologically safe.

Hyundai Mobis has also filed for three domestic and international patents covering the battery case, fire extinguishing device, fire extinguishing agent piping, and a high-pressure spraying design.

“As larger electric vehicles with extended ranges emerge, battery system safety standards are becoming increasingly strict,” stated Park Yong Jun, Vice President, Battery System R&D Group, Hyundai Mobis. “We are committed to integrating hardware and software to create advanced battery systems that not only meet but exceed global standards, and to introduce these systems to the global market.”

In related news, Hyundai Mobis has recently developed a novel material to prevent battery overheating and is currently focused on its commercialization. This pulsating heat pipe material, composed of aluminum alloy and refrigerant, can lower the internal temperature of the battery system when placed between battery cells. It is anticipated to be used as a thermal management system that offers reliable heat management, even during rapid charging.

Media Contact 
Choon Kee Hwang: 
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