So the cells I am talking about are referred to as Lithium Ion Polymer, not sure if that is the same chemistry... The specs for these type of cells define three temperature ranges for charging. (cell temp, of course, not ambient) from 0C to 10C 0.1C max Constant Current (CC) to 4.2V, 4.2C Constant Voltage (CV) to 0.05Cmin cut-off 10C to 23C 0.5 max CC to 4.0V, 0.2C CC to 4.2V, 4.2V CV to 0.05C 23C to 45C 0.5C CC to 4.2V, 4.2V CV to 0.05C
for discharge, the oeprating temp is -20C to 60C Hope that's helpful... david On Mon, Jan 6, 2014 at 8:36 AM, Michael Ross <michael.e.r...@gmail.com>wrote: > I could easily drop the cells into a cooler and put an light bulb inside. > > I am very interested to learn the details of the charging at low > temperatures. > > > On Mon, Jan 6, 2014 at 11:28 AM, David Murphy <dfm...@gmail.com> wrote: > > > Talking from experience with cell phone and tablet batteries, there > should > > be a cell spec for charging at low temp. For these type of cells, it is > > .1C, typically, below 10 degrees Celsius. 0 Degrees Celsius is outside of > > their operating range. > > > > I'm guessing you don't have the cell specs? If not, it might be wise not > to > > charge at such low temperatures. > > > > David > > SNIP > > > > -- > Put this question to yourself: should I use everyone else to attain > happiness, or should I help others gain happiness? > *Dalai Lama * > > Tell me what it is you plan to do > With your one wild and precious life? > Mary Oliver, "The summer day." > > To invent, you need a good imagination and a pile of junk. > Thomas A. Edison< > http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> > > A public-opinion poll is no substitute for thought. > *Warren Buffet* > > Michael E. Ross > (919) 550-2430 Land > (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google > Phone > (919) 631-1451 Cell > (919) 513-0418 Desk > > michael.e.r...@gmail.com > <michael.e.r...@gmail.com> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140106/0943aebe/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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140106/f50f73ce/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)
