A California-based company has unveiled a new electric vehicle battery technology that would allow EV owners to fully charge their EVs in under 10 minutes. Developed by Evonix, these battery cells are capable of charging from zero to-80% in only 5.2 minutes and up to 98% capacity in not more than 10 minutes.
Evonix’s novel battery cells were also able to retain a whopping 93% of their capacity after more than 1,000 charging cycles. These figures are unprecedented in the EV battery space and have shattered the 80% charge in 15 minutes target set by the United States Advanced Consortium (USABC) by a wide margin.
Evonix has been able to achieve this groundbreaking feat by using silicone anodes rather than the graphite anodes that are currently used in most lithium-ion batteries. Silicone anodes have been gaining popularity as an alternative battery material due to their immense energy density. On average, a silicon anode can store more than double the energy a graphite anode can hold.
Cofounder, CEO and president of Evonix Harrold Rust says fast charging has the potential to speed up mass electric vehicle adoption and that their fast-charging technology has surpassed many of the road maps set for original equipment manufacturers (OEMs). Evonix’s fast-charging batteries would grant EV owners greater range and super-fast charging speeds.
Evonix cofounder and CTO Ashok Lahiri say the silicon battery’s unique architecture allows it to fully charge in less than 10 minutes while maintaining a high life cycle. Research has shown that ordinary lithium-ion battery packs will degrade over time and even lose some of their lifespans after repeated cycles of fast charging. Evonix has been able to avoid this pitfall.
The Freemont-based company used a few tricks to work around the problems caused by silicon’s high-energy density. For starters, each battery cell is surrounded by a constraint system made of stainless steel to prevent the battery from swelling up. Orienting the electrodes to face the battery’s small side reduces the amount of constraining force needed to keep the battery from swelling.
This system of integrated stainless steel constraints provides a perpetual stack pressure that prevents particles from disconnecting electronically and cracking.
Lahiri is scheduled to make a presentation titled “Silicon-Anode Lithium-Ion Batteries for EV Applications” at the 12th International Advanced Automotive Battery Conference (AABC) Europe. His presentation will provide an overview of how Evonix’s fast-charge batteries work and an update about its electric vehicle program.
If this project proceeds according to plan, it may not be long before these new batteries find widespread use in the EVs made by manufacturers such as Workhorse Group Inc. (NASDAQ: WKHS) as more concerns of motorists are addressed.
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