# Stellantis EV battery ejection patent development

> Live situation record from CLSTR: https://clstr.news/situations/stellantis-ev-battery-ejection-patent-development
> Updated: 2026-10-09T08:20:00.000Z. Sources: 9. Developments: 3.

Automotive manufacturer Stellantis, via FCA US, has filed a patent in the United States for a “high-voltage battery rapid release system” designed to mitigate risks associated with thermal runaway in electric vehicles.

The proposed technology aims to physically separate the high-voltage battery pack from the vehicle chassis if overheating, damage, or other thermal anomalies are detected. Technical descriptions indicate this separation could be achieved through pyrotechnic fasteners—small explosive bolts—or a mechanical locking frame utilizing sliding elements. To ensure safety after the battery is expelled, the design allows the vehicle to switch to a 12-volt auxiliary battery, providing enough power to drive a limited distance away from the hazardous pack.

The system is designed to be triggered by drivers, passengers, or emergency responders via various interfaces, including physical buttons, levers, touchscreens, or switches located inside the cabin or in the trunk. Once activated, the system would sever both the electrical and mechanical connections between the high-voltage battery and the vehicle frame to prevent fire spread.

## Timeline

### 2026-10-09: Stellantis and chemical firms develop new EV battery safety technologies

Stellantis is patenting a system to eject overheating EV batteries, while Henkel and Wacker develop new thermal materials to manage heat in dense cell-to-pack battery architectures.

4 sources. https://clstr.news/cluster/stellantis-and-chemical-firms-develop-new-ev-battery-safety-technologies

### 2026-10-02: Stellantis patents system to eject overheating EV batteries

Stellantis has patented a system for electric vehicles that can rapidly eject a malfunctioning or overheating high-voltage battery pack to create a safety distance.

3 sources. https://clstr.news/cluster/stellantis-patents-system-to-eject-overheating-ev-batteries

### 2026-09-26: Stellantis patents battery ejection system for EV fire safety

Stellantis has patented a safety system that physically detaches an electric vehicle's battery pack during a fire, allowing the car to autonomously drive away from the flames using its 12-volt battery.

2 sources. https://clstr.news/cluster/stellantis-patents-battery-ejection-system-for-ev-fire-safety

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Cite as: Stellantis EV battery ejection patent development. CLSTR, https://clstr.news/situations/stellantis-ev-battery-ejection-patent-development