My I-MiEV recommends driving down to one bar on the gauge once a month to reset the gauge.
Sent from my iPhone On Jun 3, 2015, at 11:26 AM, Robert Bruninga via EV <ev@lists.evdl.org> wrote: >> Nissan doesn't recommend "trickle charging." > > I was shocked when I heard that was in the manual. Then by fortune one > day on a plane trip the guy sitting next to me noticed all my EV magazines > etc, and admitted he was a battery engineer for Nissan. > > I asked him point blank. His response was something along these lines. > "Yes, slow charging is just fine, in fact, better for the life of the > battery than "fast charging". The reason they cannot recommend it is the > simply the *ergonomics* of customer expectations of the "miles-to-go" > gauge. > > If people do nothing but trickle charge a few miles, drive a few miles, > charge a few miles, drive a few miles, etc without ever running down to > "near empty" then the "miles-to-go" algorithm just kind-of accumulates > growing errors and after weeks of this, it loses track of where the *real* > bottom of the battery is. Then they take an 80 mile trip because the > gauge tells them they have 82 miles to go, and they are indignant that the > car died at 70 miles. > > So to them, it is far *safer* from a public relations perspective to > encourage people to cycle their batteries more fully so that charging > events put in a LOT of charge and the guess-o-meter can re-calibrate > itself to where empty and full actually are. > > I can see their point. It simply is not worth it to degrade the accuracy > of the guess-o-meter by encouraging trickle charging after every use and > have to put up with daily driver dissatisfaction with the gauge, than it > is to sacrifice a little long term life on an 8 year battery. > > Understanding this makes me understand why the quote "What's best for the > life of the battery" is a completely AMBIGUOUS question and EQUALLY > ambiguous answer. "It depends on what "life" one is talking about??? > Daily Depth and mileage "life", or long-term +8 year life? > > Bob, WB4APR > _______________________________________________ > 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)
