Stellantis Patents System That Lets an EV Drop Its Battery and Drive Away

Stellantis has patented an unusual emergency safety system for electric vehicles that would physically disconnect the high-voltage battery if it overheats, is damaged, or poses a fire risk. Once the battery is separated from the vehicle, the EV could use its 12-volt battery to move away from the potentially dangerous pack.

The U.S. Patent and Trademark Office published the patent, titled “Quick Release System for High Voltage Battery for a Vehicle,” on September 17. FCA US, part of Stellantis, is listed as the applicant and assignee.

The document describes a mechanism designed to respond when a high-voltage battery overheats, becomes damaged, or creates another thermal hazard. Rather than simply trying to cool the battery, the system would disconnect it from the vehicle entirely.

The mechanism could be activated by the driver, passenger, first responder, or another person using a dedicated switch. Once activated, the system would disconnect the high-voltage battery from the vehicle’s electrical system and trigger a mechanism that physically separates the battery pack from the vehicle.

The patent describes several possible versions of the release mechanism. Some could use movable sections of a sliding frame, while others could rely on pyrotechnic devices to separate the battery pack from the vehicle. Stellantis also envisions multiple locations for the activation switches, including one inside the cabin and another in the cargo area.

That would allow the system to be activated from either inside or outside the vehicle. The switches could also take different forms, ranging from a conventional lever or physical button to a touch-sensitive control or toggle switch. The approach could potentially be adapted to different vehicle designs and packaging layouts.

Once the high-voltage battery has been disconnected, the patent says the vehicle could use its 12-volt battery for limited movement. A separate controller would manage the electric motor after the primary power source has been disconnected.

The idea is to move the vehicle away from the battery after it has been released, reducing the risk posed by a pack that could potentially catch fire. The patent does not specify how far the vehicle would be able to travel under its own power. The system appears intended for a short relocation rather than extending a normal drive after the main battery has been removed.

The patent also suggests that the system could be used across multiple types of vehicles. That does not mean Stellantis has decided to put the technology into production.

It remains unclear how far development has progressed or whether Stellantis plans to install the mechanism in future EVs. The company also has not disclosed the system’s technical limitations, including the exact distance a vehicle could travel after its high-voltage battery has been disconnected.