Here's my observation I received my cells and new the measured 3.3 volts. 16 months later when I put then in the vehicle they measured 3.298 and 3.297.
Sent from my iPad > On Jun 20, 2015, at 12:39 PM, Cor van de Water via EV <[email protected]> > wrote: > > One last question and then I prefer not to extend this subject any longer > since it appears beaten to death: > > > > Paul and Michael, > > Did you guys actually *measure* Li-Ion cells over extended period to verify > if they show self-discharge or not? > > Because the interesting thing is that self-discharge is not only well defined > (so it must be an issue) but it appears > > that everyone who measured Li-Ion cells over extended time periods (and not > just a quick voltage check that they still had juice) > > is convinced that they do show self-discharge. > > To me, it seems to be the classical case of “in theory, there should be no > difference between practice and theory. In practice, however…”. > > > > Regards, > > > > Cor van de Water > > Chief Scientist > > Proxim Wireless > > > > office +1 408 383 7626 Skype: cor_van_de_water > > XoIP +31 87 784 1130 private: cvandewater.info > <http://www.cvandewater.info> > > www.proxim.com <http://www.proxim.com/> > > > > > > This email message (including any attachments) contains confidential and > proprietary information of Proxim Wireless Corporation. If you received this > message in error, please delete it and notify the sender. Any unauthorized > use, disclosure, distribution, or copying of any part of this message is > prohibited. > > > > From: Michael Ross [mailto:[email protected]] > Sent: Saturday, June 20, 2015 6:30 AM > To: Cor van de Water; Electric Vehicle Discussion List > Subject: Re: [EVDL] "Zero self-discharge" (was: Bicycle battery) > > > > I think this is going to come down to semantics and word definition. > > > > I bet Popov never looks into self discharge because it is a basic non > existent occurrence in lithium ion batteries. Which is what Paul Dove and I > have been saying. I saw in the paper linked by Cor that he used self > discharge referring to capacity loss. > > > > > > > > Here is Dr. Popov's website: > > http://sc.edu/study/colleges_schools/engineering_and_computing/faculty-staff/popovbranko.php > <http://sc.edu/study/colleges_schools/engineering_and_computing/faculty-staff/popovbranko.php> > > > > > I went through the occurrences of "lithium" in the list and copied them for > your edification below. > > I will pull out the ones that seem pertinent to self discharge and capacity > loss in a separate posting. Mostly that is not what Popov is concerned with. > > > > *snip* > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150620/977f30e9/attachment.htm> > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: not available > Type: image/png > Size: 10048 bytes > Desc: image001.png > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150620/977f30e9/attachment.png> > _______________________________________________ > 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) > _______________________________________________ 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)
