While I see slight variation in the Ah used for a given trip depending on battery temperature with my TS-LFP100AHA cells in a 2p20s arrangement I have not had any issues ignoring the Puekert effect with my pack. You should only use 70-80% of your pack Ah any way which is enough of a buffer to more than mask any effect, especially with the CALB CA series cells. There is a YouTube video of someone pulling nearly 1000A from a 180Ah cell (or was it a 100Ah cell?). The voltage drop was minimal. For all practical purposes you can ignore it unless you plan on pushing the limits all the time.
Considering what you are replacing you will see a huge improvement in range, especially if you only used 50% of your AGM 20hr Ah rating. On Wed, May 15, 2013 at 4:15 AM, Pestka, Dennis J < dennis.pes...@covidien.com> wrote: > I saved this old e-mail from Peter, because it really honed in on what the > Peukert Effect does to the range of your EV. > See Below. > > Hit it right on the money for my 65 Datsun and its 156V pack of 65Ah > Odyssey AGM's. > I'm thinking of replacing them with (50) CA180FI, 180ah CALB LiFePo4 Cells. > > Question I have is the Peukert Effect on these Lithium Cells. > I've heard they're much better that Lead Acid, or AGM's, but does anyone > know the approx. adjustment % > > Thanks; > Dennis > > > 950 lbs. of what kind of lead? AGMs don't like to go below 50% Floodies > can tolerate 80% as can Gels. > > 12V, 8V, or 6V batts? How many? How many AH are they rated for (20 Hr > value)? > > > Here's a calculation method I've found that seems to match well to what I > get for range (can't remember > where I found it): > > (Total pack voltage X AH rating of each battery) = watt-hours (whr) stored > > whr stored X 0.57 (adjustment for Peukert effect) X 0.80 (useable DOD for > floodies or Gels) = usable whr > > useable whr divided by watt-hours per mile used (conservative value = > 300-350; not sure how > aerodynamic the Nash is) = range in miles > > > Peter Flipsen Jr > > > > Thanks; > Dennis > Elsberry, MO > http://www.evalbum.com/1366 > http://www.evalbum.com/3715<http://www.evalbum.com/1366> > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130515/db06612c/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) > > -- David D. Nelson http://evalbum.com/1328 http://www.levforum.com Nokia Lumia 920 Windows Phone 8 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130515/aa2415b1/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)
