Tesla has been busy upgrading its Supercharger network. The Cybertruck recently got a 325kW charging boost, and 500kW V4 Superchargers are on the way.
But Tesla isn’t just focusing on its high-end models, it’s also improving the charging experience for its more affordable vehicles.
LFP Battery Heating: A New Feature for Model 3 and Model Y
Tesla’s 2024 Holiday Update includes a helpful new feature. Superchargers can now warm up LFP (Lithium Iron Phosphate) batteries.
This applies to Rear-Wheel-Drive versions of the Model 3 and Model Y, including Long Range and Standard Range models.
The update lets V3 and V4 Superchargers warm-up LFP batteries, speeding up charging in cold weather.
While Tesla still recommends preconditioning before arriving at a Supercharger, this feature helps drivers save time and money by getting them back on the road faster.
How It Works
Max de Zegher, Tesla’s Director of Charging, explained the technology behind the update.
Tesla uses an AC (alternating) ripple current to warm up the battery.
While Superchargers usually provide DC (direct) charging, Tesla has figured out how to create small oscillations in the current. This generates heat through electrical resistance.
The clever technique turns the battery’s internal circuits into an electric heater, powered by the Supercharger.
The AC ripple current is a byproduct of converting AC to DC and back, and Tesla leverages this to warm up the battery.
In the worst-case scenario, below 0ºF and without preconditioning. This method can get a cold-soaked LFP vehicle back on the road four times faster than before.
The NACS Advantage
This smart engineering works because of Tesla’s NACS (North American Charging Standard) connector.
It’s a great example of how Tesla keeps innovating with the tools it already has.
What’s Next?
Right now, this feature is only for LFP battery vehicles. But there’s hope Tesla could expand it to models with 2170 or 4680 battery packs.
First, though, the company will likely test it on LFP vehicles to make sure it’s safe and effective.