rogueone
Posts: 2
Joined: Wed Jun 17, 2020 7:21 am
Delivery Date: 20 Jan 2020
Leaf Number: 311749

2016 leaf battery health

Fri Jun 19, 2020 11:46 am

My 2016 leaf has all 12 battery bars but leafspy is telling me that the AHR is 70 and SOH 88

Why this discrepancy?

LeftieBiker
Moderator
Posts: 16165
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: 2016 leaf battery health

Fri Jun 19, 2020 3:00 pm

The battery management system (BMS) may have been reset, to falsely report 12 capacity bars. When this first happens LeafSpy is also fooled, but as the BMS begins to re-learn the actual capacity, LeafSpy becomes effective again. If you bought the car recently, it was likely sold to you under fraudulent circumstances.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

WetEV
Posts: 4133
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: 2016 leaf battery health

Sat Jun 20, 2020 7:11 am

rogueone wrote:
Fri Jun 19, 2020 11:46 am
My 2016 leaf has all 12 battery bars but leafspy is telling me that the AHR is 70 and SOH 88

Why this discrepancy?
12th bar is dropped at about SOH 85%, so 12 capacity bars makes sense.

After a BMS reset SOH will be at or over 100%, so an SOH of 88 does not necessarily indicate a recent reset. However, if SOH is falling rapidly and more than 13% of SOH is lost, then a recent reset is looking very likely. SOH can wander up and down a few percent for various reasons, some known (DCQC) and some unknown.

My 2014 Leaf has SOH of 88 and has all 12 bars.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red
2019 eTron Blue

LeftieBiker
Moderator
Posts: 16165
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: 2016 leaf battery health

Sat Jun 20, 2020 1:06 pm

WetEV is right. I had a Senior Moment about 88% falling within the 12 bar display range. I'm very sorry. Check the SOH again in a few weeks. If it's the same the car is ok. If it's lower than 87% then (and only then) suspect a reset.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

WetEV
Posts: 4133
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: 2016 leaf battery health

Sat Jun 20, 2020 8:24 pm

LeftieBiker wrote:
Sat Jun 20, 2020 1:06 pm
WetEV is right. I had a Senior Moment about 88% falling within the 12 bar display range. I'm very sorry. Check the SOH again in a few weeks. If it's the same the car is ok. If it's lower than 87% then (and only then) suspect a reset.
Variations of +-2% are fairly common, at least in my experience. Graph SOH for a while. Dropping a percent or two in summer has been common for me, with some recovery in the fall. Dropping more than 3% is pointing at a possible reset. Rapid loss of 10% or more is pretty convincing.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red
2019 eTron Blue

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