EVs these days offer DC fast charging speeds of up to 250kW or more but there's something called the Charging Curve which affects your actual charging time. Learn more on this episode of Let's Talk About.
), most people boast about the maximum DC charging power possible. The higher the kW number, the faster the battery gets topped up, or so logic dictates. But just because one car can hit a higher peak power figure than another doesn’t mean it automatically wins out as there’s something called the EV charging curve.
In this episode of Let’s Talk About, Amin and Alex discuss EV battery voltage and how that affects the charging curve that ultimately determines how soon you can unplug your car and drive off.Similar to smartphones, you can’t get the maximum fast charging rate from 0-100% on an EV. If you look around, most smartphones and EV manufacturers boast a fast charging rate at a limited range such as 0-50% or 20-80%.
The charging curve pattern is similar to filling up a theatre hall or an aircraft with people. You can fill up half the seats quickly in the beginning but eventually, it gets slower to fill the remaining seats. However, this charging curve typically applies for DC fast charging at higher rates above 30kW. If you’re charging at a slower rate with AC such as 7-22kW, the charging rate is constant as it isn’t putting as much stress on the battery. That’s one of the reasons why it is better to use AC charging for your regular day-to-day charge and only use DC fast charging sparingly when required such as a
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