Larry, GM advertises 90 miles range in 30 minutes. But like I said about my Mitsubishi the car regulated the current based in the battery management system. Most of them slow down as they approach full. But if the range of a bolt is 240 miles or whatever the advertise, then it would take 2 hours and 40 minutes. So I would say that's your best time but likely slower from empty to full since it will back off the current at some point.
Sent from my iPhone > On May 21, 2017, at 9:53 PM, Larry Gales via EV <[email protected]> wrote: > > This thread has providing some useful information about charging, but I am > still left uncertain about the amount of time needed to charge the Chevy > Bolt at a level 3 station. I am considering getting a Bolt but before I do > I need to have some (average) idea as to how long it will take. I realize > that will vary with the temperature and initial state of charge, but some > rough average time would be useful. > > So, to go from 10% to 80% charge, are we looking at, say, 90 minutes, or 2 > hours, or what? > > Thanks, > > On Sun, May 21, 2017 at 5:35 PM, Cor van de Water via EV <[email protected]> > wrote: > >> Paul, >> Maybe they confused "balanced" and "stiffened"? I don't know as I did >> not read the Tesla driver's experience as there was no link provided. >> As far as I know, the Tesla has ~24V modules (blades) with 6 series >> connected herds of round cells (approx 6-7 dozen in parallel) and the >> BMS only has access to each interconnect point between the cells, so 7 >> points in each module. >> I do not know when the BMS is balancing, so if this only happens during >> charging then I can see that a continuous cycle of 1/2 hour fast charges >> may not provide enough balancing time to keep all cells properly >> balanced, while a slow overnight charge may provide ample time and thus >> make all cells behave more in line so there are fewer outliers, which >> might resemble a stiffer pack (but it not actually stiffer as the >> operation of the cells is not affected, so they sag exactly as much as >> before the balancing - only with less variation between cells! >> >> The Leaf's BMS is powered 24/7 so it balances at all times, which is >> also needed since the balancing current is extremely low (10mA) >> So for the Leaf it makes no difference if you do a fast or slow charge, >> the BMS has exactly as much time to balance (24 hours each day). >> >> Hope this clarifies, >> Cor. >> >> -----Original Message----- >> From: EV [mailto:[email protected]] On Behalf Of paul dove via >> EV >> Sent: Sunday, May 21, 2017 4:14 AM >> To: brucedp5; Electric Vehicle Discussion List >> Subject: Re: [EVDL] @50kW: Chevy Bolt charge times with a level 3 >> charger >> >> I don't know what stiffen the pack means. Sounds made up. >> >> I did watch my car charge on a chademo charger though. I had 15 miles >> range showing when it started. It said 27 minutes to charge. It started >> at 100 amps. After about 8 minutes I was up to a 60% charge and it was >> charging at 48 amps. It had steadily dropped as it charger. Not sure why >> they do this but I suppose they don't want to overheat the cells. >> >> I don't believe it's necessary based on my testing of LiFePO4 but maybe >> these other chemistries heat more rapidly. At any rate chademo doesn't >> use consistent power to charge if they did it would be much faster. I >> don't know if ccs does the same thing. >> >> Sent from my iPhone >> >>> On May 21, 2017, at 4:49 AM, brucedp5 via EV <[email protected]> >> wrote: >>> >>> When people talk of performance EVs, they usually forget about >>> performance charging. >>> I have always had a keen interest in quick charging even in the old >>> (90's) days of PbSO4. I had 6 chargers on-board with their output tied >> in parallel. >>> With all of them on I could push 22+kW into my pack (I had the fore >>> runner of a l3 charging ability). >>> >>> GM bullied Euro automakers into going their way away from using >>> CHAdeMO to using ccs combo l3 DC. >>> GM's Bolt as a maximum l3 charging ability of 80kW. Where most public >>> l2 EVSE only offer 50kW. >>> When you read GM's pages, they spec a 80kW time. >>> >>> I suggest you read >>> >>> http://www.greencarreports.com/news/1109714_more-details-on-fast-charg >>> ing-rate-in-2017-chevy-bolt-ev-electric-car >>> >>> and it's source >>> >>> https://bro05.blogspot.ca/2017/03/fast-charging-experiences-with-bolt. >>> html >>> >>> The charging rates are broken down to what a Bolt driver can expect >>> from a public 50kW l3 ccs EVSE. >>> >>> If the ambient temps are optimal, the 0 to 50% SOC will be the highest >> >>> charging rate. >>> The 50% to 80%SOC will progressively taper slower, until at the 80% >>> most eVgo L3 EVSE will shut off. >>> Other ccs combo EVSE will allow you to charge at a slow rate to 100%, >>> but really at 80%SOC you really ought to move out of the l3 EVSE spot >>> and to a >>> l2 EVSE spot if you feel you really need to charge to 100%SOC. >>> >>> With today's larger amount of public L3 EVSE available, the fastest >>> method is to only charge to 80%, unplug and hit the highway to the >>> next L3, charge to 80% and repeat (never charging to 100% unless you >>> had to because of the large EVSE gap). After being on the road with >>> multiple l3 charges, a slower overnight charge while you sleep will >> help balance/stiffen your pack. >>> >>> Tesla drivers have shown, the best method of re-conditioning your pack >> >>> after multiple l3 charging sessions (in their case using >>> superchargers), was to come home near 10%SOC and l2 charge overnight. >>> They reported it took a long time, but it made the pack stiffer, and >> helped reset the guessometer. >>> >>> >>> >>> >>> For EVLN EV-newswire posts use: >>> http://evdl.org/evln/ >>> >>> >>> {brucedp.neocities.org} >>> >>> -- >>> View this message in context: >>> http://electric-vehicle-discussion-list.413529.n4.nabble.com/Chevy-Bol >>> t-charge-times-with-a-level-3-charger-tp4686787p4686793.html >>> Sent from the Electric Vehicle Discussion List mailing list archive at >> Nabble.com. >>> _______________________________________________ >>> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>> Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag >> >>> racing at NEDRA (http://groups.yahoo.com/group/NEDRA) >>> >> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag >> racing at NEDRA (http://groups.yahoo.com/group/NEDRA) >> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ >> group/NEDRA) >> >> > > > -- > Larry Gales > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170521/0d6d0901/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
