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Re: Global Warming's Terrifying New Math

Tue May 22, 2018 11:40 am

Phximiev wrote:
JoeS wrote:Looks like this thread has evolved into solutions rather than scaring us to death...
Phximiev wrote:300 mile iMiev with Store-dot battery?
Clueless marketeers, using the soundtrack of an ICE vehicle as the BEV starts and drives off at the 00:40sec mark. Doesn't every BEV driver now just cringe when hearing an ICE car start?

They're addressing their FlashBattery being able to quickly absorb a high power jolt, but the allied issue with EV rapid charging is having a very-high energy source available and then being able to dump it quickly into the vehicle without blowing up the source or connection between the two. Last night I spent quite a few hours freezing way up in the remote Sierras at an RV campground resetting their (expletive deleted) 50A circuit breaker which was popping open as I was trying to charge Tesia (my Tesla) … I had to dial the current waaay down… 32A finally held. :twisted: These FlashBattery people are talking transferring energy at thousands of amps.

Rapid charging is only needed when doing an extended and continuous trip (like Rick on Route 66), whereas ordinary L1 and L2 normally meets most people's needs; that said, this would be really useful technology for the commercial industry, especially long-distance truckers.

As far as this FlashBattery is concerned, to paraphrase Elon, "bring me a fully-developed production-ready battery to test, and then we'll talk".

More on StoreDot: ... 5-minutes/

Oil companies involved with StoreDot: ... -giant-bp/

Just lovely...
2012 iMIEV ES
2014 Chevy Volt

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Re: Global Warming's Terrifying New Math

Wed May 23, 2018 10:17 am

To meet these claims, new charge connectors would need to be developed. I calculated that a true near-300 mile range, highway driving, would require at least a 75 kWh battery in a Chevy Bolt. To dump 75 kWh in 5 minutes, a 900 kW charge rate is required, which is 2,400 amps at 375 volts. Current 50 kW quick chargers push a theoretical max of 140 amps, although I've never seen more than 125 amps.

10 minute charge is way more likely, only requiring 1,200 amps or 450 kW. I'd hate to lug that cable.
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Re: Global Warming's Terrifying New Math

Wed May 23, 2018 10:51 am

PV1 wrote:10 minute charge is way more likely, only requiring 1,200 amps or 450 kW. I'd hate to lug that cable.
Is that really needed, as that's still faster than the time it takes to go to the bathroom and then grab a cup of coffee? For example, starting from a low SoC in the Tesla M3, one can presently pump in around 100 miles' worth of charge in ten minutes. Edit: I fixed this number as I had previously misread a graph posted on TMC.

Anyone have any scary math examples to add to this thread, as we're focusing more on the solutions rather than the problem itself?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

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Re: Global Warming's Terrifying New Math

Thu May 24, 2018 4:22 pm

The connectors and cables aren't quite so scary as voltage rises to keep the amps down. Here's a 440V 500A (220 kW) marine umbilical.

I have a friend working on a quite novel DC connector for buses and ships.

No wonder Porsche is pursuing 800V EV architecture...
2012 i-SE "MR BEAN" 96,000 miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

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