Even for gas cars, that's an extreme range. Most, I think, have a range
from 300-400 miles. Apparently people are content with that.
I'm sure that some EVs will have the option for enormous range, such as
600 miles per charge. But will people buy them? My guess is most people
would rather pay less for the car and settle for, say, 300 mile range.
As many have stated here, that's adequate for just about anything
imaginable in a day. And for the one or two times a year you need to go
more than 300 miles in a day, well, you stop and charge once or twice.
Even outside this list, I think people will realize that.
So, I don't think we'll have a crisis of needing to support a high usage
of 150kWh in one hour. We will, however need to support a large number
of sessions at 50-75kWh in one hour or less. Even that could put a load
on some distribution systems, though I don't think it's that bad.
Consider, out in the "middle of nowhere". A convenience store uses about
50kW on average and there are likely several businesses each consuming
something in that range. And there might be 4 or 5 charge points.
Overall, the load on the distribution system might double or triple. And
if we're talking about adding EV service to a small town, the
distribution system will probably already handle the load.
But, yes, I agree with Peter that utilities will need to plan for better
distribution.
Peri
------ Original Message ------
From: "Peter Eckhoff via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc: "Peter Eckhoff" <evd...@gmail.com>
Sent: 14-Dec-18 8:35:24 AM
Subject: Re: [EVDL] EVLN: Toyota dealers say there is no sale$ demand.us
forEVs
If current batteries have around 215 whr/kg and Amprius's new battery
which
maybe rated as much as 435 whr/kg (if in the same volume), a Model 3
with a
300 mile range could conceivably have a 600 mile range and a Bolt could
have a 480 mile range. At 60 miles per hour, the max range occurs at
about
10 hours and 8 hours of driving, respectively. Basically, a full day
of
driving with no pit stops for a meal and/or personal weight adjustment.
But if you want to press on for another 10 or 8 hours, I've timed a
family
pit stop at about 30 minutes and add to that the time it would take to
do
an ICE refuel at a semi-busy set of interstate pumps, you have a
minimum of
40 minutes that could be used to recharge an EV. Let's make it an
hour.
For an hour full recharge, a Model 3 and Bolt would need 150 and 120
kwhrs. At 480 volts, that's 312 amp-hours; a bit much. But spread
that
over a good night's sleep, shower, breakfast, repacking, checkout, etc.
for
a total of 14 hours, that's 22 amp-hours which is not unreasonable or
10
hours at 32 amps.
A trip from Omaha to Rapid City, SD is 524 miles and taking a side trip
to
Fossil Bed State Park is completely doable with no range anxiety; maybe
a
slight top off for a Bolt at Wall or one of the other small towns along
the
way.
The biggest hurdle will be the generation, storage, and distribution of
the
energy to recharging points.
Has anyone read what the utilities are planning on doing?
On Fri, Dec 14, 2018 at 9:08 AM Collin Kidder via EV
<ev@lists.evdl.org>
wrote:
On Thu, Dec 13, 2018 at 7:43 PM Lee Hart via EV <ev@lists.evdl.org>
wrote:
>
> If fast charging is so vital, how come the market isn't flooded with
> fast chargers for cellphones, laptops, power tools, and all our
other
> battery-operated toys?
?!?!?!?! Umm.... IT IS. The market most certainly is packed full with
fast chargers for cellphones. They all advertise how their new 9v wall
wart and cable will charge your phone up like 80% in 45 minutes or
some such thing. Companies like Samsung have specifically built fast
charging into their premium phones. Likewise on power tools. As you
might expect, people doing construction burn through batteries on
portable tools. So, those chargers tend to be quite fast also - they
even have thermal management but only in the form of "we won't charge
this battery until it's not hot anymore." Laptops don't tend to have
super fast chargers because you can usually use them plugged in anyway
so the battery ends up being more like a built-in UPS.
So, yeah, fast charging most certainly exists where there is a use
case for it. I can see the draw of fast charging for electric cars
too. It's true that 90% of the time you don't need it and can charge
slowly at home. But, as EVs become more prevalent there will be cases
where people have nothing else. In that case if you have to drive 700
miles somewhere then you need some fast chargers. I think the biggest
draw for fast chargers are that they fill the gap we currently have
where you can recharge quickly with gasoline (only maybe 4 minutes)
but you can't do that in an EV. So, people are used to filling up
quickly and want to retain that. This is mostly psychological but you
can't discount that. Psychological issues are very real and saying
"just charge at home" doesn't cut it. People aren't looking for your
alternatives, they're looking for ways to do what they want to do.
There are many people who won't get an EV until they feel like they
can charge it back up anywhere and quickly. Until then they've got
their gas guzzler that can do that.
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