Polestar and fast-charging battery pioneer StoreDot have successfully demonstrated the implementation of StoreDot’s Extreme Fast Charging (XFC) technology in a car for the first time, charging a Polestar 5 prototype from 10-80% in just 10 minutes. The fully driveable verification prototype saw a consistent charge rate starting at 310 kW and rising to a peak in excess of 370 kW at the end of charging.

This world-first demonstration of a 10-minute 10-80% extreme fast charge using silicon-dominant cells in a driveable vehicle – rather than individual cells in a laboratory environment – is the continuation of Polestar’s commitment to developing the best driving experience for the future through innovative technology partnerships. The specially commissioned 77 kWh battery pack – which has the potential to be increased to at least 100 kWh, could add 320 km of range to a mid-sized electric car in 10 minutes.

XFC test by Polestar and StoreDot battery engineers

This XFC test by Polestar and StoreDot battery engineers was designed to demonstrate proof-of-concept for XFC battery technology that could be applied to 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.”

StoreDot’s revolutionary XFC technology utilises silicon-dominant cells with an energy density on par with state-of-the-art NMC cells, and does not require specialist cooling systems in the vehicle. The experimental XFC battery’s modules have a structural function which, improves mechanical properties and cooling ability while maintaining or reducing weight levels, with high recyclability and serviceability also paramount in the design of the pack.

commercial EV batteries, fast charging rates can vary greatly

In today’s commercial EV batteries, fast charging rates can vary greatly depending on the battery’s state of charge (SOC), sometimes dropping significantly as SOC increases. During this test, Polestar saw charging speed rise from 310 kW at 10% SOC to over 370 kW at 80% SOC, proving the technology’s steady charging rate with no significant change in charging speed or efficiency whenever a driver decides to stop within this wide state-of-charge range.

Importantly, the test proves XFC technology works with today’s DC charging infrastructure, which continues to feature more high-power DC chargers of 350 kW or higher.

This means drivers will be able to spend less time stopped to charge their vehicle, which for a 10-80% charge on many modern EVs could still take around 30 minutes. By reducing that time to 10 minutes, the charging time for a vehicle with XFC technology is much closer to what you would experience when filling a car with petrol. And thanks to the consistent charge speeds on offer, with a suitable charger, consumers could stop for five minutes at 50% SOC and continue their journey with over 80% SOC.

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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• StoreDot is partnering with VinES to develop XFC battery cells and plan for commercialisation
• Agreement will focus on the development of several XFC types of cell form-factors, expected to be adopted on VinFast vehicles starting from 2025

The agreement follows the already announced strategic investment of VinFast into StoreDot (Series D, January 2022); marking a new milestone in the cell technology development between both companies and helping them to promote advanced battery technology and prepare to introduce XFC battery solutions for the green mobility market, including VinFast’s smart electric vehicles.

The agreement will see both companies embark on a collaboration to jointly research, develop and offer extreme fast charge (XFC) battery cells in different form-factors, in preparation for XFC battery mass production and supply. StoreDot will license and share its proprietary XFC technology whereas VinES will provide and contribute its know-how and experience with multiple form factor development, manufacturing, validation and global supply chain network.

The first generation of this XFC battery cell is expected to be commercially available in 2025 and immediately adopted by VinFast vehicles.

Dr. Doron Myersdorf, StoreDot CEO said:

“We’re delighted to be partnering with VinES and further cementing our long-standing relationships with Vingroup and VinFast. This venture is an important one for us as we look to build more partnerships with companies at every level of the EV battery ecosystem such as Vingroup. I’m confident that the combination of our XFC cell chemistry and VinES’s complimentary form-factor development, manufacturing, evaluation, certification, and supply chain capabilities will deliver world-class market leading EV batteries that will raise the bar further for the industry.”

Talking about the partnership, Ms Pham Thuy Linh, CEO of VinES said:

“The partnership with StoreDot reflects VinES’ s complimentary strategies by combining global innovative technologies with those in-house in our state-of-the-art production of electric vehicle batteries in Vietnam. With the XFC technology, we believe it will offer improved customers’ experience, provide cost savings and remove charging time anxiety entirely. With StoreDot’s team of talented scientists and experienced experts, combined with our know-how in multiple form-factor development, real production experiences, we are excited to work towards a near-future commercialisation of the XFC technology and contribute to the acceleration of the EV revolution globally.”

Last year, StoreDot revealed its ‘100inX’ strategic technology roadmap. This featured 100in5, 100in3 and 100in2 of miles (or 160 km) per minute of charging – three generations of StoreDot technologies of silicon-dominant XFC, semi solid state and post-lithium architecture. The roadmap reaffirms that the timings for these will be delivered over the coming decade with 100in5 by 2024, 100in3 by 2028 and 100in2 by 2032.

StoreDot has a long-standing relationship with conglomerate Vingroup. In January last year leading Vietnamese electric car manufacturer VinFast (a Vingroup company) was the lead investor in StoreDot’s Series D funding round of up to $80 million USD.

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• StoreDot’s technology roadmap will deliver 100 miles of range on a 2-minute charge by 2032
• Fast-charging battery cells offering 100 miles in 5 minutes will be ready for mass-production in 2024, followed by 100 miles in 3 minutes by 2028
• StoreDot is at the advanced stages of developing groundbreaking semi-solid state technologies
• StoreDot’s battery cells are currently in real-world testing by global automotive electric vehicle manufacturers

• StoreDot gives automotive manufacturers a clear, realistic technology roadmap for solving the Range Anxiety barrier to help create a cleaner world
• Extreme fast-charge multi-patented battery technologies with proven battery chemistry can now be applied to any cell format, including the 4680 family form factor

StoreDot, the pioneer of extreme fast charging (XFC) battery technology for electric vehicles, has revealed its strategic technology roadmap, labeled ‘100inX’, which will deliver batteries capable of charging a 100 miles of range on just a 2 minute charge, with mass production readiness planned within 10 years.

StoreDot is also firmly on track for its first milestone for global automotive manufacturers: producing its silicon-dominant anode XFC lithium-ion cells at scale by 2024 that will be capable of delivering 100 miles of range in 5 minutes of charge.

In parallel, StoreDot is already at the advanced stages of developing groundbreaking semi-solid-state technologies which will further improve the batteries by 40% over 4 years – delivering 100 miles of charge time in just 3 minutes and be mass production ready by 2028.

100in5, 100in3 and 100in2 of miles per minute of charging are three generations of StoreDot technologies of Silicon dominant XFC, semi solid state and full solid state. They will be delivered over the coming decade with 100in5 by 2024, 100in3 by 2028 (40% improvement) and 100in2 by 2032 (additional 33% improvement).

Dr Doron Myersdorf, StoreDot CEO “It’s absolutely crucial that we give global automotive manufacturers a clear, realistic and hype-free roadmap for the introduction of our fast-charging battery technologies. After intense development of our silicon-dominant chemistries we will be mass-production ready by 2024, delivering a transformative product that will overcome the major barrier to the widespread adoption of electric vehicles – charging times and range anxiety.

“However, we are committed to a rapid transition to a cleaner, zero-emissions world and our strategic technology roadmap extends long after 2024, where each milestone represents an impressive performance improvement – a major impact on the driver’s experience. We are also progressing with our semi-solid state battery aiming for its production at scale by 2028, which will demonstrate a better charging experience for EV drivers in terms of miles per minute of charging.

“Our ultimate goal though, and one that is now absolutely in our grasp, is to produce cells that will revolutionize charging times, achieving 100 miles of range in only 2 minutes. This breakthrough performance that was once considered impossible – is achievable with StoreDot’s technology in just 10 years from now.”

StoreDot’s ground-breaking extreme fast charging cells will be available in both pouch and the 4680 family form factor – the formats increasingly favored by the majority of global car manufacturers. Pioneering work for these XFC cells has been undertaken with participation of global experts from Israel, the UK, the US and in China. ‘100in5’ cells of StoreDot’s XFC technology are already being tested in the real world by a number of automotive OEMs.

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