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Re: How Low Can You Go?

Posted: Tue May 02, 2017 7:21 am
by sub3marathonman
drees wrote:
sub3marathonman wrote:Also, I did not see any specific cells going bad, all the delta V readings were within 17 to 24 mV (IIRC).

On my 8-bar LEAF which isn't far away from 7-bars, you can see that the voltage spread starts going up significantly by the time you get down to 40% SOC. By LBW (34% SOC), there is a clear separation of voltages with cell-pairs 1-48 starting to drop below cell-pairs 49-96.


But it is far from 5 remaining bars, which is where I was. Now, I didn't try to do the readings at any specific (high or low) SOC, but it is true that probably my readings were close to 100% SOC. I will have to try to go back through the records and see if there were any taken at low SOC when there were 5 or 6 bars.

And I too saw that LBW was there at about 34% SOC, I'm thinking that would have been huge to be going another three or four miles before the LBW and down to 20% SOC or so. I still in general was able to avoid even LBW (34% SOC) at 5 remaining bars. I guess it depends on Nissan's definition of "low," but with a third remaining I don't consider that "low."

Re: How Low Can You Go?

Posted: Tue May 02, 2017 11:31 am
by GerryAZ
Low battery and very low battery warnings seem to be at fixed levels. Therefore, they come in at progressively higher percentage of remaining capacity as the battery deteriorates.

Re: How Low Can You Go?

Posted: Tue May 02, 2017 1:11 pm
by SageBrush
OP: you can use post #2 in this thread to easily calculate the available Ahr or kWh capacity of an aging pack, but miles / kWh is driver and local conditions dependent. Examples of variables unrelated to the battery:

Speed
Brake use
Road condition
Wind
Mud/Ice/Snow/Water
Ambient Temperature

These conditions can easily add up to 50% variation between driver results and 100% at the edges

Re: How Low Can You Go?

Posted: Wed May 03, 2017 5:35 am
by Brharding
Similarly, what is the highest mileage / odometer reading anyone has reached with the same battery?

Re: How Low Can You Go?

Posted: Thu May 04, 2017 3:55 pm
by Reddy
Brharding wrote:Similarly, what is the highest mileage / odometer reading anyone has reached with the same battery?
TaylorSFGuy documented 150,000 mi on his 2011 before giving it to a family member.
http://mynissanleaf.com/viewtopic.php?f=27&t=21961&p=462072#p462052