Flat towing an EV—pulling it with all four wheels on the ground—is far more complex than with gas-powered cars. Unlike traditional vehicles that can be placed in neutral, EVs require more advanced solutions to avoid damaging their electric motors. Now, Stellantis and Rivian are developing new technologies to make flat towing easier and more efficient.
Why Flat Towing EVs Is a Challenge
Flat towing works by disengaging a vehicle’s drivetrain, but EVs don’t have traditional transmissions. Their motors are always connected to the wheels, meaning they create resistance when being towed. Without proper modifications, towing an EV could damage the motor or battery. This makes flatbed towing the safer—but less convenient—option for now.
Stellantis’ Patent: Using Electricity to Reduce Drag
Stellantis has proposed an ingenious solution for EVs with permanent-magnet synchronous motors. Their patent suggests using the high-voltage system to weaken the motor’s magnetic field, reducing torque and allowing the wheels to spin more freely without straining the system. This method isolates the motor from the battery while keeping the car towable.
Rivian’s Software-Based Approach
Rivian, known for its off-road-capable electric trucks and SUVs, takes a different route. Its patent suggests a software-controlled method that disconnects the motors powering the rear axle. This would allow the front wheels to remain engaged, ensuring better control and stability while being towed.
Future Possibilities: Charging While Towing?
Ford, in a separate patent, has taken the idea even further—charging an EV while it’s being towed. Their concept suggests harnessing energy from the spinning wheels to recharge the battery, similar to how regenerative braking works. If implemented, this could extend an EV’s range on long trips and make towing even more efficient.
Why This Matters
Flat towing is particularly important for RV owners and off-road adventurers who want to bring their EVs along without a trailer. It could also simplify roadside assistance and reduce the need for flatbed towing. If these patents make it to production, they could revolutionize how EVs are transported.
