This electric car battery takes less than 5 minutes to charge | CNN Business
This electric car battery takes less than 5 minutes to charge | CNN Business
A British startup may have found the answer to one of the frustrations of driving an electric car — waiting around for the battery to charge.
Nyobolt, based in Cambridge, has developed a new 35kWh lithium-ion battery that was charged from 10% to 80% in just over four and a half minutes in its first live demonstration last week. [...] Nyobolt's technology builds on a decade of research led by University of Cambridge battery scientist Clare Grey and Cambridge-educated Shivareddy, the company said. Key to its batteries' ability to be charged super-fast without a big impact on their longevity is a design that means they generate less heat. It also makes them safer as overheating can cause a lithium-ion battery to catch fire and explode. In addition, the materials used to make the batteries' anodes allow for a faster transfer of electrons. Nyobolt is currently in talks to sell its batteries to eight electric car manufacturers. At 35 kWh, the battery is much smaller than the 85 kWh in a more typical American electric vehicle (EV). Yet the technology may be used in larger battery packs in the future.
Independent testing of Nyobolt's batteries by what it called a leading global manufacturer found that they can achieve over 4,000 fast-charge cycles, equivalent to 600,000 miles (965,600 kilometers), while retaining more than 80% of capacity, Nyobolt said in its Friday statement. William Kephart, an e-mobility specialist at consultancy P3 Group and a former engineer, said EV batteries of the kind Nyobolt has developed could "theoretically" be charged as fast as the firm is promising, but the challenge was manufacturing such batteries on an industrial scale. A crucial chemical element in Nyobolt's batteries is niobium but, as Kephart pointed out, last year only an estimated 83,000 tons (94,500 tons) was mined worldwide. Compare that with graphite, commonly used as anode material in lithium-ion batteries: an estimated 1.6 million tons (1.8 million tons) was produced in 2023. In addition, there are currently "a lot of unknowns" with the niobium battery technology, he told CNN. "The industry will work it out (but) it's not seen by the industry as a scalable technology just yet," he added.
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So...
70% of 35kWh ➡️ 35kWh*0.7 = 24.5kWh 24.5*(60/4.5) ~ 326kW of charging powerNot bad. I mean realistically, on average, you'd get maybe close to 150kW charging. That's still not bad.
To charge at that rate, you'd probably want more than 326kW at the beginning, and less at the end. An empty battery changes faster than a nearly full one.
I like using the bathtub as a comparison for batteries. Fill it as fast as you want at first but you can't let it overflow. As you get closer to the top you have to slow down more and more. At closer to 80 percent you should be charging at closer to 20 percent or less of the rate you did at the start. As you crest 80 percent the chasing rare should almost plummet.
Edit: As you crest 80 percent the charging rate should almost plummet.
I hate it when my chasing rare plummets
Thank you I fixed it.