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. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20181214/cdb89b08/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
