http://vtb.engr.sc.edu/vtbwebsite/downloads/publications/capacityfade_JPSPaper2.pdf Here is one study on the effects of different voltage cutoff points using CC-CV charging. I believe this was well before DIYers were using them. From: David Nelson <gizm...@gmail.com> To: Paul Dove <dov...@bellsouth.net> Sent: Thursday, June 4, 2015 9:37 PM Subject: Re: [EVDL] Success! Actually, those procedures were developed by customer feedback mostly! As some of us started reducing the ending voltage so did the spec sheets of TS, CALB, et al. Do you have references for those procedures being developed prior to 5 years ago? I haven't been able to find them. Maybe it was just the Chinese manufacturers who did that but then they were some of the only ones who would sell us DIY people batteries.
On Thu, Jun 4, 2015 at 5:19 AM, Paul Dove <dov...@bellsouth.net> wrote: > Sorry about that my dog hit my arm and hit send by accident. Sure one can > develop their own procedure however, these procedures were developed in a > laboratory and the batteries dissected afterwards to see the effect. My point > was anything over 3.38 V is charging the cell > > Sent from my iPhone > >> On Jun 4, 2015, at 7:16 AM, Paul Dove via EV <ev@lists.evdl.org> wrote: >> >> >> >> Sent from my iPhone >> >>>> On Jun 3, 2015, at 11:27 PM, David Nelson <gizm...@gmail.com> wrote: >>>> >>>> On Wed, Jun 3, 2015 at 10:50 AM, Paul Dove via EV <ev@lists.evdl.org> >>>> wrote: >>>> Yes I suppose this is confusing. Let them ion batteries are charged >>>> according to a procedure. Let's take lithium iron phosphate for example. >>>> According to the procedures you charge to 3.65 V constant current. Then >>>> you hold the voltage at 3.65 and taper the current to C/20. >>> >>> Remember that that procedure was developed to reduce time to charge and the >>> chance that the batteries get overcharged while still reaching 100%SOC or >>> nearly so. >> _______________________________________________ >> 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) >> -- David D. Nelson http://evalbum.com/1328 http://www.levforum.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150605/20f5d1b9/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)
