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Battery Chemistry news
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Re: Battery Chemistry news
by Burgerman » 24 Sep 2021, 23:15
Theres literally hundreds of such claims made every year going back decades.
ALMOST every one never actually produes anything but website and news articles. The real aim is ££££ $$$$ as they are students looking for a research job to feed themselves.
And daft claims like scooters that can charge in 90 seconds is daft because that would require 2 things. SOLID COPPER cells to take huge currents needed even on a typical small 20Ah 48V scooter battery. Which is impossible. And more current than your house can give. Much more.
Lets see what a car would need.
EV car like a tesla 80kwh. To do it in an HOUR takes an 80KW supply. (10x as much as your house can do. A high power tesla supercharger can do that as long as only one car turns up at a time. And it needs its own power sub station... To do that in 1 minute would be x60 more current. So you need a 80kw x 60 = 3600KW supply. 3600KW would supply a small town. Yes its only 90 secs not 60. So "only" a 2400KW supply. Ever saw the size of 8kw shower cables? You need THREE HUNDRED of those in your charge cable... Again thats going to need a dedicated high power electric pylon. And cables you cant lift. So yes they might work for some things like a phone if they ever exist. No use in an EV.
As it is you can already charge hobby lipo packs at 8 and 10C so 6 mins. Why are then not in cars? Same issues. Its why I charge my small helicopter pack as big as a fag packet at all the house can supply at 3000watts! Its why the PL8 is a tiny hobby charger and it uses all out power in a wall socket in the 240V UK, and double what the US 120V system can do. And thats a tiny tiny battery in 6 minutes. So marvelous headline claims. But we already have batteries that can charge way way faster than we can do in reality as its simply impractical.
ALMOST every one never actually produes anything but website and news articles. The real aim is ££££ $$$$ as they are students looking for a research job to feed themselves.
And daft claims like scooters that can charge in 90 seconds is daft because that would require 2 things. SOLID COPPER cells to take huge currents needed even on a typical small 20Ah 48V scooter battery. Which is impossible. And more current than your house can give. Much more.
Lets see what a car would need.
EV car like a tesla 80kwh. To do it in an HOUR takes an 80KW supply. (10x as much as your house can do. A high power tesla supercharger can do that as long as only one car turns up at a time. And it needs its own power sub station... To do that in 1 minute would be x60 more current. So you need a 80kw x 60 = 3600KW supply. 3600KW would supply a small town. Yes its only 90 secs not 60. So "only" a 2400KW supply. Ever saw the size of 8kw shower cables? You need THREE HUNDRED of those in your charge cable... Again thats going to need a dedicated high power electric pylon. And cables you cant lift. So yes they might work for some things like a phone if they ever exist. No use in an EV.
As it is you can already charge hobby lipo packs at 8 and 10C so 6 mins. Why are then not in cars? Same issues. Its why I charge my small helicopter pack as big as a fag packet at all the house can supply at 3000watts! Its why the PL8 is a tiny hobby charger and it uses all out power in a wall socket in the 240V UK, and double what the US 120V system can do. And thats a tiny tiny battery in 6 minutes. So marvelous headline claims. But we already have batteries that can charge way way faster than we can do in reality as its simply impractical.
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