Jed Rothwell wrote:
thomas malloy wrote:
Suppose you want to recharge a dozen cars at one time, ten times per
hour (six minutes each) during the peak rush hour. That's 120
I have a simple answer, you plug the car in when you shut it off. I'm
talking about a garden variety, 20 Amp plug in.
That's fine for short trips, but Mike Carrell is saying that on long
trips over highways beyond the range of the batteries quick to
recharge electric cars have a real problem. He is right. A recharge
station similar to a 12 page gasoline station would require a large
bank of super capacitors and also a 1 MB or 2 MB power supply -- like
the kind used in a large hospital or hotel. This would surely cost far
more than a conventional gas station. The problem is not
insurmountable but it would be expensive.
- Jed
Well said Jed however there is a variable that has not been considered.
The ultra-cap bank could be truck mounted allowing a power up station to
be deployed at any truck stop or freeway rest area. This flying reserve
could even be on-call, assuming your mobile phone is not also dead. Thus
the station cost is the cost of the truck and its Ultra caps and the
cost of the training for the driver electricians. It is even conceivable
that they could move with demand: the highway to the coast in summer and
the one to the snow in winter.
I have a battery swap design with wheels on the battery pack and a ramp
and winch in the cars belly. As a consequence I have been considering
been considering the other part of the problem: road service for dead
cars. In that case you need a medium truck with communications a dozen
replacement packs and a semi-robotic crane with a 2 meter reach. The
kind that drops a pallet of tiles or bricks on the lawn when your building.
The other problem with battery swap is locking the batteries down
solidly so they don't become a projectile. This has been one of the
major reasons some governments object to retrofits and why battery swap
for EV's has not been seen except in fleet vans and milk trucks.
- Re: [Vo]: "Bettery" on-the-way? Wesley Bruce
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