Designing a Battery System (BSA) to Fundamentally Block Fires
Hyundai Mobis Develops New Technology to Prevent Battery Thermal Runaway
Hyundai Mobis announced on the 14th that it has succeeded in developing a new technology that can automatically spray extinguishing agents to immediately suppress fires when a battery cell catches fire. This technology, which prevents heat from transferring to adjacent cells and thereby preemptively blocks thermal runaway in batteries, is a new technology that has not yet been commercialized worldwide.
Hyundai Mobis designed the Battery System (BSA) to not only delay thermal runaway using heat-resistant materials but also to fundamentally prevent it in advance. Major countries such as Europe, China, and India mandate that battery cells delay thermal runaway for at least five minutes after initial ignition. Additionally, some countries are pursuing stricter regulations to prevent heat transfer itself from occurring.
The BSA developed by Hyundai Mobis consists mainly of hardware and the software logic that controls it. The hardware includes the Battery Management System (BMS), extinguishing device, and battery case.
The BMS analyzes abnormal signs by evaluating the battery’s temperature, voltage, and internal pressure of the battery system based on real-time data collected by sensors. It sets the location to spray the extinguishing agent in case of ignition and commands the extinguishing device to operate.
The software is designed to enable fast and accurate judgment and response to physical changes that may occur within the battery system. Hyundai Mobis’s high-reliability judgment logic features multiple safety devices and a dual-redundant algorithm structure.
Inside the battery system, an extinguishing agent five times the capacity of a typical household fire extinguisher (3.3 kg) is installed. This agent is a substance with excellent cooling, insulation, and permeability properties and is harmless to the environment and human body. Hyundai Mobis has also filed three domestic and international patents related to this technology, including the battery case, extinguishing device, piping for the extinguishing agent, and design technology capable of spraying under high pressure.
Park Yong-jun, head of Hyundai Mobis’s Battery System Research Lab, said, “As large electric vehicles with improved driving range emerge, safety standards for battery systems are becoming more stringent. We will continue to develop advanced battery systems integrating hardware and software and introduce them to the global market.”
A battery system model developed by Hyundai Mobis to prevent thermal runaway. It can suppress fires by spraying extinguishing agents at high pressure at the ignition point. Provided by Hyundai Mobis
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