Did actually read it? That paper is about capacity loss not voltage drop over time.
Sent from my iPad > On Jun 19, 2015, at 7:58 PM, Cor van de Water via EV <ev@lists.evdl.org> > wrote: > > David, > > Here is a paper describing the chemical and physical mechanisms inside a > Li-Ion cell > that cause self-discharge. Happy reading! > http://www.che.sc.edu/faculty/popov/drbnp/WebSite/MSA-calendar.pdf > > 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 > 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. > > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of David Nelson via EV > Sent: Friday, June 19, 2015 4:37 PM > To: Bill Dube; Electric Vehicle Discussion List > Subject: Re: [EVDL] "Zero self-discharge" (was: Bicycle battery) > > Bill, > > I have dug through many scientific papers on Li batteries and how they work > and I haven't been able to find anything about a theoretical self-discharge > mechanism. I have found some explicitly talking about the lack of a charge > shuttle mechanism like in lead-acid batteries, however. > > One paper I read has a section devoted to figuring out a charge shuttle > mechanism to add to a Li cell. It isn't a paper for the faint of heart, > however. It is "Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable > Batteries" by Kang Xu published in the Chemical Review, 2004, Vol. 104, No. > 10, pp. 4303-4417 and published on the web 09/16/2004. > > While I'm sure I don't get it 100% of the time I try to make sure I say, > "LiFePO4 cells have no theoretical self discharge mechanism." > This, according to all I have been able to find on the cells, is true. > Also, the most ardent anti-BMS people I have found have in fact done a lot of > searching of the scientific literature and came to the same conclusion. It > was not just something they made up to support their anti-BMS position. > > If you have other literature showing what the self-discharge mechanism is > please share it. > >> On Fri, Jun 19, 2015 at 11:46 AM, Bill Dube via EV <ev@lists.evdl.org> wrote: >> This "zero self-discharge" myth seems to be a common thread with the >> "anti-BMS" crowd. I don't know where this misinformation comes from. >> >> All cells have self-discharge. It is just a matter of degree. >> Also, the self-discharge varies from cell to cell. That's why you need a BMS. >> These are well-documented facts for all those that care to >> investigate, either through the scientific literature or by simply >> systematically testing cells for themselves (as Lee Hart has done.) >> >> I strongly suspect the "zero self-discharge" myth comes from >> the same unscientific source that the anti-BMS myth has sprung from. >> >> Bill D. >> >> _______________________________________________ >> 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 > _______________________________________________ > 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) > _______________________________________________ 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)
