I believe the 80% top rule is for ultimate lifespan of the cells. Of course, no one really knows the shelf life of these batteries anyway, so it may be irrelevant depending on a specific usage pattern.
damon > From: [email protected] > To: [email protected] > Date: Thu, 21 Mar 2013 07:24:41 -0400 > Subject: [EVDL] LiFePO4 Characteristics > > > I know lead is well known nut I'm still leraining about Lithium batteries. > Recently there was a VA-Tech seminar on LiFePO4 batteries and > Manganese-Lithiums used in the Nissan leaf. The professor said not to charge > them above 80% or below 20%. I understand the bottom part, I try not to go > below 80% DOD but I fully charge 2X a day to close to 100%. I would think > that limiting a 100ah battery to 60ah would be a severe limitation. Why > would fully charging a lithium battery cause degredation? Hi also said the > impedance gfoes *up* when fully charged which I thought the opposite was true. > > Have a renewable energy day, > mark > www.REEVA.info > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130321/535188d8/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) > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130321/b06d027a/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)
