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Samsung’s 20-year-life EV battery runs 600 miles on 9-minute charge
(interestingengineering.com)
this post was submitted on 02 Aug 2024
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I posted about this a week ago. The battery pack will likely be around 150kWh (Nio has a solid state battery car that will be produced that can do 577 miles on a 150kWh battery). The 9 minute charge is from 8-80% (according to the marketing material I dug up) so it is 432 miles of charge in 9 minutes. Considering fast charge costs like $0.50/kWh currently, I'm guessing most people will not be charging up that entire portion unless they are planning on driving for a long fucking time...after they have already been driving for 9-10 hours.
But that charge rate would have to come from a charger that can output much higher than current ones. The highest output you are likely to find is 350kW which would take 18 minutes to charge that 108kWh. So while this battery can charge that fast, you are not likely to be able to find a charger with that high of output for a few years. Still great to be able to get a couple hundred miles of range in 9 minutes. Solid state batteries supposedly have a quicker ramp up period and can take the full output for a higher percentage of the battery.
Does fast charging reduce the lifespan of a battery like this? The headline is bothersome because my suspicion is it won't last 20 years if you fast charge all of the time and whatnot. I realize that's not a typical case but it's good to understand the trade-offs.
The chemistry is substantially different, so we'll probably have to wait until scientists run some tests to get a more precise set of parameters that affect degradation. I expect failure modes like dendrites are basically impossible with solid-state, but electrode cracking is still possible. There might even be new and exciting ways they can degrade! Regardless, this is still great news.
Engineering Explained has a good summary: https://youtu.be/w4lvDGtfI9U (Piped link: https://piped.video/watch?v=w4lvDGtfI9U)