Polestar’s StoreDot XFC battery – 10 to 80% in 10 Minutes

Polestar teamed up with fast-charging battery pioneer StoreDot to demonstrate StoreDot’s Extreme Fast Charging (XFC) battery in a car for the first time. The prototype Polestar 5 with the StoreDot battery went from 10-80% in j10 minutes. This verification prototype charged starting at 310 kW to peak in just over 370 kW by the end the charge.  

This world-first demonstration uses silicon-dominant cells in a driveable vehicle, proving the concept that until now were single cells in a laboratory. The 77 kWh battery pack could be enlarged to around 100 kWh, with the 77 kWh pack adding 320 km of range during the 10 minute demonstration. This XFC test by Polestar and StoreDot see such batteries in all future Polestar vehicles.  

Thomas Ingenlath, Polestar CEO, says: “Time is one of life’s greatest luxuries, and as a manufacturer of luxury electric performance cars, we need to take the next step to address one of the biggest barriers to EV ownership – charging anxiety. With this new technology, on longer journeys when drivers do stop they’ll be able to spend less time charging and be back on the road faster than before. In fact, that stop time will be more akin to what they experience with a petrol car today.”

The cause for excitement in StoreDot’s XFC battery development are its silicon-dominant cells that have an energy density equal to state-of-the-art NMC cells, but doesn’t require any special cooling to be installed. XFC batteries improved mechanical properties and cooling ability, weigh less, are highly recyclable and serviceability also paramount in the design of the pack. 

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Polestar’s StoreDot XFC battery – 10 to 80% in 10 Minutes

Current EV batteries have fast charging rates that vary wildly depending on how much charge the battery has. The rate often decreases dramatically as the amount of stored energy increases. The closer to 100%, the slower the rate of charge. During this test, Polestar’s charging speed rose from 310 kW at 10% SOC to over 370 kW at 80% SOC, completely eclipsing current batteries. Despite the fast charging rate, the test shows XFC batteries can charge using current DC charging at 350 kW or more.

One of the biggest objections to buying and EV is the time to charge. The new batteries bring the time closer to what a conventional ICE refill might take.

Dr Doron Myersdorf, CEO of StoreDot, comments: “We are very excited to share this impressive achievement today and proud to be on this journey with Polestar. Polestar’s commitment to acknowledge that extreme fast charging technology is necessary to make widespread electric car adoption a reality. This breakthrough revolutionises ownership by eradicating the barrier of range and charging anxiety once and for all as drivers will be able to travel long distances with the same freedom and convenience as traditional fossil fuel-powered vehicles.”

A film showing the testing procedure can be found here: https://www.polestar.com/global/news/how-we-charged-a-polestar-in-10-minutes/

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