The Li Ion batteries that I received new from a Nissian Dealer about 5 months ago have a formula of LiMnO4 + LiNiO2 for the Anode. The Cathode is Graphite. The maximum rated voltage is 4.2V. Recommend maximum voltage to use is 4.0 volts.
The minimum voltage is down to 2.4V which I will never go down that far. Recommend lowest cell voltage is 2.85V. So far the minuimum voltage is 3.8 volt after driving about 10 miles. The maximum battery running temperature was 68 degrees F and the charging temperature is the same after charging for 45 minutes. The battery pack has six cells in parallel which only receives about 8 amps each charging at 50 ampere at 240 VAC charger. The battery temperature was at 68 degrees F in side the battery box which is insulated to about 30 R Factor. Did not turn on the battery box exhaust fan, because the outside ambient air temperature was greater than 68 F. Maximum ambient out side temperature was 72 F and the inside of the EV passenger compartment was 84 degrees after the EV was setting outside for about 2 hours. This is the first time I turn on the A/C this year. Roland ----- Original Message ----- From: Willie2 via EV<mailto:[email protected]> To: Electric Vehicle Discussion List<mailto:[email protected]> Sent: Friday, March 27, 2015 10:13 AM Subject: Re: [EVDL] EVLN: LEAF EV Pack Reliability Outperforms Cynics & Critics (?) On 03/27/2015 10:40 AM, Michael Ross wrote: > WIllie2 and I were having a back channel about this topic. Willie was > thinking that LFP had a voltage simnilar to other chemistries. I > thought others might want to see this too. > > Here is what the Handbook of Batteries 4th Ed. says. From Table 26.3 > Characteristics of Some Positive Electrode Materials: > > Order of entries: Material, Specific Capacity (mAh/g), MIdpoint > Voltage vs. Li at C/20, Comments > > *LiCoO(2) (LCO) 155, 3.9 * > Most common, Co expensive =>$ > > *LiNi(1-x-y)Mn(x)Co(y)O(2) (NMC), 140 -180, ~3.8 * > Safer, =<$, capacity depends on upper cutoff V > > *LiNi(0.8)Co(0.15)Al(0.05)O(2), 200, 3.75 * > Safe as LCO, high capacity (Tesla?) > > *LiMn(2)O(4), 100 - 120, 4.05 * > =<$, Safer than LCO, poor temp stability > > *LiFePO(4) (LFP), 160, 3.45 * > Very safe, low volumetric energy, processed in inert gas =>$ process > > *Li[Li(1/9)Ni(1/3)Mn(5/9)]O(2), 275 3.8* > High specific capacity, low rate capability, R&D scale only > > *LiNi(0.5)Mn(1.5)O(4), 130, 4.6* > Requires electrolyte that is stable at high voltage > > I stand corrected. It is implied that "to the best of my recollection" prefaces every thing I say. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150327/aff52e93/attachment.htm<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150327/aff52e93/attachment.htm>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/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/20150327/932938b3/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)
