Hello Bruce,
It is recommended by the Orion BMS unit manual you can download at Orion BMS /Manual that the maximum voltage rating of the Leaf cells are 4.2 volts, it is recommended to charge only to 95% to leave room for REGEN if you have it or 98% without REGEN. The Nissan battery pack minimum voltage is 2.4V actually, but this car uses 2.85V as a minimum. It is preferred for long life not to go below 3.6-3.65V as a minimum which is battery discharge to 8-10% SOC. I set my maximum charge voltage at 95% or about 3.99-4.00 volts. Set the SOC meter to 100% SOC at the 4 volt level. I am using twice the amount of Leaf cells, so my minimum voltage voltage have never went below 3.85 volts which is still above the nominal voltage of 3.8 volts for driving from one end of the town to the other. I am using three modules in parallel or is six cells in parallel. If I charge at 24 amps, than each cell is only being charge at 24a/6=4 amps each. If a person is using a PFC Charger by Manzanito Micro like I do and plan to charge the Li Ion cells, turn off all the micro switches 1 to 8 and timer to 0. When voltage reaches the acceptance voltage or the maximum voltage you dial in, then the voltage will maintain that voltage until the SOC (ah) reaches 100 percent which is control by the BMS which shuts down the charger input power by use of a AC contactor. Or a second option recommended by the BMS company is to allow the charger to taper its current down to a low level before turning off the charger by use of the built in timer. As the acceptance voltage is reach, the ampere will step down in stages which holds the ampere at a constant level at each stage drop. This current step down method, is what I will use. It is not recommended to shut down a charger at a full current load. Roland ----- Original Message ----- From: via EV<mailto:[email protected]> To: [email protected]<mailto:[email protected]> Sent: Sunday, April 19, 2015 2:16 PM Subject: [EVDL] Leaf Voltage I’m finally getting the new pack together and it’s made up of Leaf cells. What voltage range should these cells have? I want to be conservative and make this new pack last a very long time. Bruce _______________________________________________ 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/20150419/285f9fe5/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)
