sub3marathonman
Posts: 306
Joined: Wed Nov 03, 2010 11:57 am
Delivery Date: 31 Mar 2012
Location: Bartow, FL

Re: How Low Can You Go?

Tue May 02, 2017 7:21 am

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."

GerryAZ
Gold Member
Posts: 1492
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: How Low Can You Go?

Tue May 02, 2017 11:31 am

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.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

SageBrush
Posts: 1496
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: Colorado

Re: How Low Can You Go?

Tue May 02, 2017 1:11 pm

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
2013 Model 'S' with QC & rear-view camera
Bought off-lease Jan 2017 from N. California with 63.9 Ahr after 22k miles
Car is now enjoying an easy life in Colorado

Brharding
Posts: 6
Joined: Fri Apr 07, 2017 7:48 pm
Delivery Date: 08 Jun 2017
Location: Folsom, CA

Re: How Low Can You Go?

Wed May 03, 2017 5:35 am

Similarly, what is the highest mileage / odometer reading anyone has reached with the same battery?

Reddy
Posts: 1444
Joined: Fri Feb 11, 2011 3:09 pm
Delivery Date: 18 Aug 2011
Leaf Number: 006828
Location: Pasco, WA

Re: How Low Can You Go?

Thu May 04, 2017 3:55 pm

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
Reddy
2011 SL; 9 bar, 45.80 AHr; 43,000 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

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