Agree that votlage or curent will neeed to be high and perhaps the new technology produces less by-product heat.The charging current would be phenomenal, and would either mean very heavy (thick) cables, or very high voltages to the charge points.
Kw (charge) is basically a matter of volts x amps. Yes, I know about power factors, but I said 'basically'.
The infrastructure just isn't there and would be phenomenally expensive to install, run and especially, to supply.
There would also be high heat transfer, which batteries just don't like.
The report that I heard mentioned that the difficulty would be the need for (far) higher charging voltages and providing the infrastructure to deliver that.The charging current would be phenomenal, and would either mean very heavy (thick) cables, or very high voltages to the charge points.
Correct, but an AC system will be powering it, and I did say 'basically'. If you want to get technical, I'm a retired Electrical Engineer, but I don't see any need to start going overboard with technical aspects of power distribution when we're only really interested in the end connections and what they power.Power factor is entirely irrelevant to DC systems
Well it was you who introduced power factor to the thread. Any charger design supplying a unity pf load will present very close to unity power factor to the AC supply. Such a charger will almost certainly be a primary switched power supply so no big and heavy transformer.Correct, but an AC system will be powering it, and I did say 'basically'. If you want to get technical, I'm a retired Electrical Engineer, but I don't see any need to start going overboard with technical aspects of power distribution when we're only really interested in the end connections and what they power.
No! You are describing an inverter power supply (which I used to design at one point in my career)Please read my post again. You seem to have missed the point. I did say 'basically'. But as you started the subject, here's more.
Regarding a primary switched power supply of what will be high voltage input to get a high current output for superfast charging, the difference in primary and secondary voltage difference will be via a transformer as that's how inverters work, whether you go from dc-ac in pv generation, or ac-dc in 'smart' battery charging using chopping circuitry to limit current as the battery voltage approaches 'full'.
Also remember that transformer power factors change as the load out goes up and down, so on high current outputs that fall as the battery charges, active power factor correction would have to be built to the controls or the companies that run the charges wouldn't be making as much money, which, after all is what their aim is.
The power factor of a transformer is never unity, as a transformer has to magnetise the core (kvar) to make it work and in any case some of the wasted energy is also heat.
NOTHING is 100% efficient, although a transformer (defined as a machine that makes one kind of energy do something else - electricity - magnetism - electricity) is as near as we get.
5 minute charging will indeed be a game changer - but such a battery is of less benefit if you can't charge it.Turnup, AlanH you seem to have gone OFF topic. The question was are batteries capable of 5 minute charging going to be a game changer for the future of EVs
the electric vehicle has a pack comprising of hundreds of EV Flash Battery cells that can store enough energy for up to 300 miles (480 km) range on a 5-minute charge.