Chinese engineers test a battery that ejects itself in under a second
A Chinese research team built a battery pack that senses fire and shoots itself out of an electric vehicle in under a second. The prototype lands 10 to 20 feet away, using an airbag-style gas generator. The idea tackles lithium-ion fires that resist all conventional suppression—and may preview global safety rules coming in 2026.
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30 SEC SUMMARY
- Chinese researchers tested a prototype EV battery pack that ejects itself within one second of detecting a fire, launching it 10–20 feet away from the vehicle.
- The system uses an airbag-style gas generator to push the battery out sideways, but software to prevent ejections in crowded areas hasn’t been developed yet.
- Lithium-ion battery fires can’t be stopped by conventional methods once thermal runaway begins, reaching over 300°C and reigniting multiple times.
- China’s 2026 safety standard bans fires or explosions during thermal runaway, pushing experiments like this ejectable battery and Renault’s fire-hose port.
- Legacy automakers like Hyundai and Kia have patented slower, manual systems for dropping battery packs, while Stellantis proposed an automated quick-release mechanism.
TABLE OF CONTENTS
KEY HIGHLIGHTS
- An experimental EV battery pack in China detects fires and ejects itself in under one second, sending the pack 10–20 feet away.
- The system uses a gas generator, like an airbag inflator, to push the battery out sideways from the vehicle.
- Lithium-ion fires in thermal runaway reach over 300°C and can reignite repeatedly, defying all current suppression methods.
- China’s new 2026 safety standard bans fire or explosion during thermal runaway, accelerating extreme solutions like ejection systems.
- Joyson Electronics and iCar denied involvement; the prototype’s developer may be linked to Maite Group, which didn’t respond.
- Hyundai, Kia, and Stellantis have patented slower, manual battery-release systems for thermal runaway emergencies.
China tests a battery that blasts free in fires
Chinese engineers at the China Collision Repair Technology Center built a battery pack that senses a fire and blasts itself out of an electric vehicle in under a second. The prototype, shown in grainy video, uses a gas generator—like the one in an airbag—to hurl the pack sideways. It lands 10 to 20 feet away, clear of the car.
Safety gaps and unclear developers raise concerns
The system is still crude. There is no software to block ejections in dense city traffic or near pedestrians, so the pack could hit another car or a bystander. Joyson Electronics, an auto supplier listed in Shanghai, said it had nothing to do with the project, despite being named in early reports. iCar, a brand of Chery, also denied involvement.
Records show no formal registration for the China Collision Repair Technology Center. Reports tie it to Maite Group, which specializes in car repair and aftermarket parts, but Maite Group did not answer questions.
Why lithium-ion fires still have no good fixes
Lithium-ion batteries under thermal runaway heat up faster than they can cool down—over 20 °C per minute—hitting 300 °C within minutes. Once started, thermal runaway cannot be stopped. A 2026 study by UL Research Institutes found no suppression method works after the process begins.
A 2020 U.S. National Transportation Safety Board report on Tesla fires documented packs reigniting hours or days later, requiring tens of thousands of gallons of water to fully extinguish.
Automakers have tried slower fixes. Stellantis patented a system to drop a burning pack to the ground, while Hyundai and Kia jointly filed a 2024 patent that needs the driver to stop and pull a lever before the pack falls. Neither matches the speed of China’s automated ejection.
China’s 2026 safety rule pushes extreme solutions
China’s mandatory safety standard takes effect in July 2026, requiring EV battery packs to neither ignite nor explode when a cell enters thermal runaway. That deadline is pushing radical ideas. Renault, for example, is giving away free licenses for a fire-hose port that lets firefighters flood packs with water, cutting suppression time to match gasoline cars.
What this means
Lazyfounder analysis — our interpretation, not reported fact.
China’s 2026 safety standard is forcing a race for extreme fixes—including ejectable batteries—that could become global baselines if they prove workable.
Key takeaways
- China’s 2026 rule requiring EV batteries to resist fire or explosion during thermal runaway is already driving radical solutions like ejectable packs.
- No suppression method can stop thermal runaway once it starts, so hardware workarounds—whether ejection, quick-release, or firefighter ports—are now the focus.
- The Chinese prototype ejects batteries automatically in one second, far faster than manual systems patented by Hyundai, Kia, and Stellantis.
- Unresolved risks, like ejected batteries landing near cars or pedestrians, leave room for startups to refine the idea with smarter sensors or mapping software.
Related on Lazyfounder
Sources
- Engadget · 2026-11-08
These Experimental EV Batteries Can Eject Themselves During A Fire
This story is an original summary drafted with AI by Lazyfounder from the reporting listed above and checked by automated validation. Facts are attributed to their original publishers; sections marked as analysis are Lazyfounder's. Where a source is in another language, facts were machine-translated and quotations are reported, not reproduced. Read the original coverage via the links, and see our AI policy and corrections policy.
About the author
Editor, Lazyfounder
Tarun Mottlia edits LazyFounders, covering Indian startups, funding rounds, AI and product launches. Every story on the site is AI-assisted and checked against its cited sources before publication.
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