http://hybridautocenter.com/HAC4/index.php?option=com_content&view=article&id=72&Itemid=631
Unom=3,8V; Umax=4,1V (4,2V); IchargeMax=120A; Icharge=15-20A (1/3C)
Umin:
3V=57,5Ah=96%
3,5V=54Ah=90%
3,65V=51Ah=85%
For long term storage is recommended battery to be at 40-50% charge. Storage at higher temperatures (over 50C) decreases the battery life. The battery could be stored at low temperatures,
but should not be charged at temperatures under 0C.
The battery is rated for 1200 cycles at 0-100% charge until it reaches the 80% of the capacity or 5000 cycles when used 0-80% charge.
http://www.mynissanleaf.com/viewtopic.php?t=14143#p321869
On the high side usually 4.1V is the cut off for a "full" charge although I've seen 4.125 briefly. Technically you should be "ok" taking it as high as 4.2 or as low as 2.5 if done gently and for a short period of time.. although the Leaf won't let you do that so it's really a non-issue. "damage" is a grey area.. you will do more damage resting at 4.2V than at 4.1V.. you will do more damage at 4.1V than resting at 4.0V.
Best would be to leave the batteries at 3.6V at around 20 degrees C and don't drive the car
Please not that the small differences in voltage could be related to changes made in 2013. We have also seen some variation between vehicles.
Yes, it's 96 modules and 192 cells. Since the pack voltage is an aggregate, it can fluctuate a bit after each charge and discharge to turtle mode. The voltage on a full charge is 4.10 on cell basis or about 393.6V on the pack level. I recall seeing something higher than that on occasion, perhaps 0.5 or 1V extra on pack level. The turtle voltage is less clear, and some differences have been observed. I typically saw it around 3.20V on the cell level and 308V on the pack level. A lithium manganese oxide cell is considered to have reached its maximum energy slightly below 4.20V (4.17V are often used). Conversely, a fully discharged cell might reach 2.50V on the cell level. The LEAF does not cycle the cells fully and is reserving about 4 to 5% at the top and about 2% at the bottom.
On the Leaf 3.6V (345v) is pretty low SOC.. somewhere between LBC and VLBC? maybe 20% SOC? The differences between 3.6V and 3.8V in regard to battery longevity is probably not that big of a deal.. more important (by far) seems to be to keep it cool.
