Chris Hogg Wrote in message:
On Tue, 14 Mar 2017 09:53:27 -0000 (UTC), Tim+
wrote:

Would be nice if some of this turned out to be true.
http://spectrum.ieee.org/energywise/...the-end-of-oil

Tim

Interesting. I see they're claiming the battery will charge in minutes
rather than hours.

Say a typical car petrol tank holds 12 gallons. 1 gallon of petrol has
an energy equivalent of 33.4kWh
https://en.wikipedia.org/wiki/Gasoli...lon_equivalent

So a typical car petrol tank contains an energy equivalent of about
400kWh. If that were to be replaced by a battery storage system, which
was wanted to be recharged in say 5 minutes (one twelfth of an hour),
as is done now with a petrol filling system, that would require a
power input of 4800kW (400x12). At 1000 amps that would be 4800 volts
(assuming my logic and numbers are correct, which they may not be!).

I'd be interested to see the forecourt of the future!

But I imagine things would no longer be done that way. If those
batteries are truly reliable, then an exchange system would probably
be the way things would go.

Or you'd charge it at home overnight?

What are the relative efficiencies of petrol vs electric powerplants?

--
Jim K


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