5-minute charging
People are clueless as to how big an infrastructure commitment would be needed to support that level of power transfer and just how dangerous it is.
So ya, not buying it.
Right you are. The energy needed for 1000 mile drive is a lot of kilowatts. To transfer so many kilowatts in 5 minutes? There is no such infrastructure possible in practical situations.
I was going to say the same. The current requirements would be enormous.
People are clueless as to how big an infrastructure commitment would be needed to support that level of power transfer and just how dangerous it is.
With Its Power Grid On The Verge Of Failure, California Begs Residents To Change Their EV Charging Routines (6.23.21)
Whispers of a 1000-mile range and a 5-minute charge. If that claim sounds ridiculous it is because it is.
Yes People are clueless about the power requirement to do such a charge. Hook one of these to a 100 watt solar panel in the sun and then see how long it takes to charge up. Probably a month.
“People are clueless as to how big an infrastructure commitment would be needed to support that level of power transfer and just how dangerous it is.”
Let’s see...
1000 mile range means you need something like a 200kwh battery.
That’s 12000kw-minutes, so to charge that in 5 minutes you need to ram through it 2400 kw or 2.4MW of power.
With an 800 volt charging station that would mean a current of 3000amps. YIKES!
Or did I screw up someplace?
There’ll be some epic arc-flash videos on the internet when John Q. EV-user starts handling that sort of power.
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5-minute charging
People are clueless as to how big an infrastructure commitment would be needed to support that level of power transfer and just how dangerous it is.
So ya, not buying it.
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Exactly. These people think that all you would need to do is to plug it in to recharge it, just like an Iphone.
Too many Americans without STEM literacy!
“5-minute charging”
Nope. It pays to read the article.
Article-—————
But as with all things that sound too good to be true, a closer look at the official source is necessary.
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This could mean a future range of nearly 1000km (over 600 miles). A rapid charging time of 10 minutes or less (from 10-80% state of charge)
600 m × .7 × 0.25 kwhr/m = 105 who’s.
That is 12 minutes with Tesla’s V4 charger.
Just because we don’t have enough power generation to come close to replacing ICE vehicles for personal use (forget about commercial trucks for the moment), nor enough transmission capacity, nor enough local distribution, nor enough materials mining and processing to begin to build the above, and that it would take several decades build up to do those things, why are you such a Debbie Downer?
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You don’t charge off the mains you charge off the shipping container megapack right behind the charge stalls.
BYD has a 14.5 megawatt hour pack that fits in a standard 20 foot iso box with its power converters at that.
14.5 Mw is 28 500kw charge stalls running flat out from a single 20’ box two of those boxes end to end would be the size of a American 40 foot ISO box which is more common here. So a typical 40’ would support 56 stalls at 500kw remember V3/V4 stalls are 250kw not 500 so double that again in supported stalls numbers.
Each EV to go from 10% to 80% of a 75kWh pack like a Model 3 needs 57kWh accounting for 10 ish percent DC-DC charging losses typical for fast DC rates into that sized pack. Two 20’ BYD 14.5 packs is 29,000kWh you could charge 511 Model 3 sized packs with those megapacks and charge them slowly over night for 8-12 hours.
But but the grid. Go look up at the typical suburban distribution lines in wood poles count the insulator disks each one is rated at 1000-2000volts so you probably have 7200 or 12000 volt triple phase lines top and one on each arm.
The Wal-Mart down the road has 7 lines per pole four on the bottom arm two on the top arm and one across the top all of them have 10 disk HV insulator stacks so that’s 3 phases , 3 phases and a G/N phase for the 7th wire. Those wires are 600 mcm sized aluminum. @12000V typical for T&D in suburban areas the top triple phase is carrying 400 amps per phase @12,000V not exactly triple it’s 2.77 due to the nature of Delta wired 3P AC so 13.296 megawatts the bottom four lines are a Y wired triple phase and in this mode you do get three equal phases of 400 amps relative to the 4th wire ground/neutral. It’s why there is four HV lines not 3. That second set under the first is carrying 14.4 megawatts for a total pole T&D of 27.696 megawatts.
So how much current is needed for an 8 hour overnight refill of said megapack ? Over 8 hours you need 3.6 megawatts extend that to a 12 hour refill and it’s 2.4MW
You are not even stressing that individual small power pole with 3.6MW that’s only 108 amps on the top triple phase. For comparison the Wal-Mart itself is a 1-1.2 megawatt load but it’s not open 24/7 it closes at 2300 and won’t open until 0600. Remember those packs are holding 500+ full charges worth for a sedan sized EV and could support 100+ V3 stalls all at once today with existing Tesla tech.
You have 27 megawatts at the property edge you need 1/10 of that over a 10 hour window or 3.6MW for 8hr buy cheap wind at night we had negative $11 a couple days in a row overnight in ERCOT and it’s almost always $20 or less at night for West Texas wind that’s 2 cents per kWh or less every night mostly all night. You can sell that at 30-50 cents at the fast DC handle rate Tesla owners pay less vs retail users. Sometimes under 30 cents off peak. I charge off my panels above the steel building so it’s zero cents effectively since the panels paid themselves off years ago for those sets. It’s what could I have sold that power for is the opportunity costs.
So yeah you can have 50+ stalls and 500+ full charges worth per day at your typical Wal-Mart parking lot. Even if you only had the top triple phase at 7200V you could fill the megapacks while the Wal-Mart is closed and using much less amps it’s only running it’s freezers and minimal AC until morning right before opening I used to manage a target night stocking crew right after secondary school and before deploying it was always hot because the A.C. Was off at night and dark too with every third light on and two off. So I know for a fact when big boxes are closed they ramp way down the power costs by design.