GaleHawkins
Posts: 503
Joined: Sat Oct 26, 2019 5:24 pm
Delivery Date: 15 Oct 2019
Leaf Number: 311365
Location: Murray KY

Re: How to Check Battery Capacity, Degradation and Range

Fri Nov 15, 2019 10:49 pm

Thanks Lothsahn.

Figure 5 results for a non updated firmware mirrors what I am seeing at 3.5 years/low 20K miles after 750 charge cycles so maybe the software update is the factor in my case or at least one of the factors in my reported low SOH.

I need to find the variables used to estimate SOH because from the last time I recharged before today SOH has moved from 64.85% to 65.47% not that is a meaningful value change. This spring I will have more time to get the car to a qualified Leaf service center.

Some reported a DC fast charge has given them back one SOH bar and I want to understand how that could possible happen before I do the firmware update. Almost daily the results of using Leaf Spy Pro is moving my understanding of the traction battery function forward.

GaleHawkins
Posts: 503
Joined: Sat Oct 26, 2019 5:24 pm
Delivery Date: 15 Oct 2019
Leaf Number: 311365
Location: Murray KY

Re: How to Check Battery Capacity, Degradation and Range

Sat Dec 19, 2020 2:42 am

GaleHawkins wrote:
Fri Nov 15, 2019 10:49 pm
Thanks Lothsahn.

Figure 5 results for a non updated firmware mirrors what I am seeing at 3.5 years/low 20K miles after 750 charge cycles so maybe the software update is the factor in my case or at least one of the factors in my reported low SOH.

I need to find the variables used to estimate SOH because from the last time I recharged before today SOH has moved from 64.85% to 65.47% not that is a meaningful value change. This spring I will have more time to get the car to a qualified Leaf service center.

Some reported a DC fast charge has given them back one SOH bar and I want to understand how that could possible happen before I do the firmware update. Almost daily the results of using Leaf Spy Pro is moving my understanding of the traction battery function forward.
As an update 13 months later I lost my 4 SOH bar 6 days after the above post. After Christmas holidays I dropped of car 30 Dec 2019 and after some resistance at division level the 40 kWh battery was installed and I picked it up 12 Feb 2020. It got totalled 7 Nov 2020 when a Toyota van shot through a red light. SOC was 89% and 5 weeks later and after running it hard 2 miles testing handling at interstate speeds SOC is at 88%. I am working on getting a parts car and they aren't cheap.

Strangely with the 12v battery disconnected SOH per Leaf Spy Pro stops declining. I plan to get 12v blade cut off switch to test if 12 volt battery being connected leads to faster degradation of traction battery when we get it back on the road.

Ragnar
Posts: 1
Joined: Thu Jan 21, 2021 8:47 pm
Delivery Date: 22 Jan 2021

Re: How to Check Battery Capacity, Degradation and Range

Thu Jan 21, 2021 8:49 pm

Any updates on 2019 battery characteristics? I am looking at as used 2019. The first post in this thread talks about fast degradation in the 2018 pack.

goldbrick
Posts: 1309
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: How to Check Battery Capacity, Degradation and Range

Fri Jan 22, 2021 11:59 am

The 40kWh packs look OK, at least to me. They seem to drop in a non-linear but similar manner on most of the cars monitored here. Also, AFAIK, there are no verified cases of a 2018+ car that has lost a capacity bar yet, in any climate or use case.

LeftieBiker
Moderator
Posts: 17113
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: How to Check Battery Capacity, Degradation and Range

Fri Jan 22, 2021 12:03 pm

It looks like there is one case of this, but so far only one.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

alozzy
Posts: 1971
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: How to Check Battery Capacity, Degradation and Range

Fri Jan 22, 2021 1:07 pm

For details on a 40 kWh pack that's had issues, see this post:

https://www.mynissanleaf.com/viewtopic. ... 20#p597396

That's an outlier though (taxi, with many DCFCs)
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

DougWantsALeaf
Posts: 2793
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: How to Check Battery Capacity, Degradation and Range

Fri Jan 22, 2021 7:58 pm

While they had a popped cell, they actually were still at 12 bars.
2019 S Plus (93.86% SOH) & 2019 SV Plus (93.35% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

goldbrick
Posts: 1309
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: How to Check Battery Capacity, Degradation and Range

Fri Jan 22, 2021 8:04 pm

Indeed. On the one hand, it's a bit scary to see that cell. On the other hand, it shows how robust the Nissan design is, in that it can tolerate that kind of wear and change but still work as designed, and hopefully still be safe. I have no idea how close that cell is to causing a problem but the fact that it was still operating as normal indicates it isn't completely fragile.

binks
Posts: 30
Joined: Thu Mar 02, 2017 5:12 pm
Delivery Date: 20 Mar 2017
Location: Ottawa Canada

Re: How to Check Battery Capacity, Degradation and Range

Tue May 11, 2021 12:31 pm

Does this seem ok for a 2017 30kw?

Image

https://imgur.com/a/BYqSccs

LeftieBiker
Moderator
Posts: 17113
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: How to Check Battery Capacity, Degradation and Range

Tue May 11, 2021 12:36 pm

The wrong screen is showing.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Return to “Range / Efficiency / Carwings”