On Fri, Jun 14, 2013 at 9:05 PM, Lee Hart <[email protected]> wrote:
> > > As Don Blazer said, while the resistance of an individual LiFePO4 cell can > be quite low, there can also be large differences between cells. He's seen > 2:1 on the CALBs. I've seen 4:1 or more (on Thunderskys). > > So how do you calculate the theoretical charge storage difference between cells when the ESR isn't really the same as what a resistor does? Diffusion differences alone will cause an effective resistance to differ and yet not change the charge storage efficiency. If there is a theoretical value of the SOC difference between two cells which started out at the same SOC after they have been cycled a given number of Ah then we could check with actual use. I think that one of the things that is possibly confusing things is that there is no theoretical self discharge in a LiFePO4 cell where there is in a lead acid cell. -- 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/20130614/49303134/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)
