Absolutely never trickle charge any type of Lithium Ion battery Sent from my iPhone
> On Jun 3, 2015, at 11:12 AM, Ben Goren via EV <ev@lists.evdl.org> wrote: > > Thanks, everybody, for all the advice. > > Sunday evening when I had dinner at their place, I set the car to only charge > to 80%. I also set the timer so that it'll finish charging by 6:00 am, > thinking that that was when their time-of-use plan kicked up to the higher > rate. They actually don't have a morning restriction, only an afternoon one, > so I'll probably change that to 8:00 am, so that any charging will be a > closer match for the coolest part of the day...it'll be cooler at 8:00 am > than 10:00 pm, with 6:00 am about as cool as it gets. > > One relevant question...they've only got the 110V charger with the car. It's > plenty for their actual charging needs...but the Nissan manual pretty clearly > says that Nissan doesn't recommend "trickle charging." Does anybody know if > that's a "you'll damage your pack if you always trickle charge" > recommendation, or if it's a "you'll die of frustration watching paint dry in > the time it takes to charge" recommendation? If the latter...not a problem. A > very, very long day of driving for them would be 50 miles, and that'd easily > go back in the battery overnight. The former...would be worth getting > something Dad can plug into the 220 outlet in the garage. > > The garage has a not unreasonable amount of insulation...not ideal, but as > much as is practical. And there's a window A/C unit mounted in the wall that > they'll leave on when it's hot. > > A swamp cooler is out for the other reasons mentioned, and for the fact that > Dad does a lot of woodworking in the garage, and the big humidity swings > would be a problem. > > The Leaf is a bit bigger than the '55 VW Bug that previously lived in the > garage (and is now going to live in the carport), so Dad was busy making room > in there and backing in and out yesterday when I stopped by for a minute. > They haven't charged the car yet and it still has 40 miles on the > guess-o-meter. > > All in all, definitely a wise investment. Amortized over several years or so, > it's a net financial gain...and the money they used to pay for the car was > sitting in an account not doing anything. The month-to-month expenses are > going to be significantly less, so it'll feel to them like they've got more > money to play with. And they won't have to get gas, there's no maintenance, > and all the rest. And it's a really nice car to boot. Probably the best thing > they've done with their money since they paid off their mortgage early. > > Thanks again, everybody, for all the advice! > > b& > >> On Jun 1, 2015, at 9:05 AM, Michael Ross via EV <ev@lists.evdl.org> wrote: >> >> In a phone conversation, Dr. Dahn told me that LFP starts deteriorating a >> 104°F when fully charged. >> >> You can simply not charge fully. Exactly how not fully? I don't know. >> Also there may be differences depending on the form factor, source of the >> electrode, electrolyte compositions, and so on. >> >> No rules of thumb here, but you may want to prudently reduce the charge >> cutoff voltage. The difference between 3.4V and 3.7 could be huge in terms >> of cell life, particularly if the pack gets hot when charged. >> >> This is complicated by the general rule not to ever, ever charge Li ion >> cells in your residence. >> >> Mike >> >>> On Mon, Jun 1, 2015 at 10:40 AM, tomw via EV <ev@lists.evdl.org> wrote: >>> >>> My garage is a steel building with no insulation. In summer it typically >>> is >>> 10 to 15 F warmer than outside temperature. You can feel the IR radiation >>> from the walls and roof, like being in an oven, and the metal is hot to the >>> touch. In June through August it is typically 100 to 118 F inside. My ev >>> has been garaged there for 5 1/2 years, 40k+ miles. I live in high desert >>> where the nights are typically 35 F lower than daytime highs, so the >>> highest >>> temperature the battery reaches just sitting in the garage is significantly >>> below the daytime high temperature in the garage since the cells have >>> significant heat capacity and are in insulated boxes. >>> >>> The pack has been up to 110 to 115 F a number of times in the hot months >>> after longer drives. Seems to just keep going. Each year I do a test drive >>> to discharge the pack to about 28% SoC, then floor the accelerator to draw >>> 3C from the pack and see if the LVC alarm on the minibms triggers. So far >>> it >>> has not. Range likely has decreased a bit, but this test indicates it has >>> not decreased all that much. My cells are LiFePO4, different than the Leaf, >>> but according to Dahn worse with regard to temperature effects, so I don't >>> think you need be too concerned. On the hottest days I sometimes park the >>> car in the shade of a tree rather than leave it in the garage. >>> >>> Winter brings the opposite problem, but I have Farnum heaters under >>> aluminum >>> sheet that the batteries sit on and 1/2" insulation in the boxes. Keeps >>> them at the set point of 65 F in the winter when it is plugged in in the >>> garage and above 50F if left parked outside for 4 - 5 hours. >>> >>> >>> >>> >>> >>> -- >>> View this message in context: >>> http://electric-vehicle-discussion-list.413529.n4.nabble.com/Success-tp4675905p4675945.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 >>> For EV drag racing discussion, please use NEDRA ( >>> http://groups.yahoo.com/group/NEDRA) >> >> >> -- >> To invent, you need a good imagination and a pile of junk. >> Thomas A. Edison >> <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> >> >> A public-opinion poll is no substitute for thought. >> *Warren Buffet* >> >> Michael E. Ross >> (919) 585-6737 Land >> (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone >> (919) 631-1451 Cell >> >> michael.e.r...@gmail.com >> <michael.e.r...@gmail.com> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150601/5cb534fb/attachment.htm> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> For EV drag racing discussion, please use 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 > For EV drag racing discussion, please use 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
