On Tue, Oct 4, 2016 at 10:12 AM, Mark Hanson via EV <email@example.com> wrote: > If that's the case I wonder why Nissan dropped the less than 100% requirement > from the newer 2014 and up vehicles? I guess I don't understand why fully > charging and equalizing the cells would hurt battery life. Maybe just a hang > on from the lead days :-).
Keep in mind that even though the removed the 80% charge option in the USA in 2014, I believe that option still remains in European and Japanese market vehicles. What isn't known, is if the chemistry in all markets is the same or not. Also keep in mind that Nissan still recommends against leaving the car sit fully charged for long periods of time. All lithium batteries will lose capacity faster when subjected to higher temperatures or higher states of charge. So if you want to maximize battery life, you want to keep those two variables lower. It does seem that at least with the '11-13 LEAFs (it's too soon to tell with the '14+ LEAFs), temperature makes a bigger difference than SOC. Temperature related capacity loss should roughly follow Arrhenius Equation which states that for every 10C rise in temperature, the rate of chemical reactions (and thus capacity loss) will double. Dave _______________________________________________ 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)