Hyundai Mobis reveals self-extinguishing EV battery

Hyundai Mobis has come up with a new way to make electric cars safer. They've created a special battery system for EVs that has its own built-in fire extinguisher. This new technology is like having a tiny firefighter inside the car's battery, ready to put out any trouble before it gets big.

The big worry with EV batteries is something called "thermal runaway." This is when one battery cell gets too hot and starts a chain reaction, heating up the cells next to it, which can lead to fires or even explosions. Hyundai Mobis's new system is designed to stop this from happening.

The system can put out a fire in just five minutes after it starts by spraying a special agent. This agent is not harmful to people or the environment. It's also really good at cooling things down, stopping electricity from flowing where it shouldn't, and getting right to the problem area. The system puts out fires and stops the heat from spreading to other battery cells, which prevents the situation from getting worse.

This new technology from Hyundai Mobis meets and even goes beyond the stricter safety rules that are being put in place in Europe, China, and India. The company has already applied for three patents for their design, which cover the battery case and the fire-fighting device itself.

The whole system is called the Battery System Assembly (BSA) and includes both the hardware (the actual parts) and the software (the computer programs that control it). It has a Battery Management System (BMS) that keeps an eye on things like temperature, voltage, and pressure all the time. If the software detects a problem, it tells the built-in fire extinguisher to spray the special agent right where it's needed. The extinguisher can hold five times more of the agent than a regular 3.3-kilogram fire extinguisher you might have at home.

Hyundai Mobis is also working on other ways to make EV batteries safer. One of these is a special material that won't overheat easily. They are also developing a "pulsating heat pipe" made of aluminum and a cooling liquid. This will help keep the battery cool when it's charging up really fast, which will make the battery last longer and work better.

Park Yong Jun, who is in charge of battery system research and development at Hyundai Mobis, said that as the rules for EV battery safety get tougher, their goal is to create even better solutions that go above and beyond what is expected around the world.

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