DaveinOlyWA
Posts: 12877
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Post Your Battery Degradation Results

Mon Mar 05, 2018 7:58 pm

On my 2018, I have gone from 115.13 ahr to 114.80 ahr in barely over 1400 miles.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 5775 miles, 488 GIDs, 38 kwh 113.37 Ahr available, SOH 98.21, Hx 115.75
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

WetEV
Posts: 2039
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Post Your Battery Degradation Results

Mon Mar 05, 2018 8:00 pm

2104 SL 40,000 miles today, 60.57 Ahr HX 91.15
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

Beardedjeff
Posts: 20
Joined: Sat Nov 07, 2015 6:50 am
Delivery Date: 30 Oct 2015

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 8:15 am

2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!

DaveinOlyWA
Posts: 12877
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 8:25 am

Beardedjeff wrote:2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!


I had a 2013 with higher stats but add in the extra 1½ years of time and you are just about where I was. I bounced between 91-93% at 44,840 miles but switched to 30 kwh LEAF in Nov 2016
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 5775 miles, 488 GIDs, 38 kwh 113.37 Ahr available, SOH 98.21, Hx 115.75
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

User avatar
lpickup
Posts: 1096
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 23 Dec 2016
Leaf Number: 312310
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 12:37 pm

Beardedjeff wrote:2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!


Nice! My 2016 SV (30kWh battery), with 14,558 miles, only has 3.86 AHr more than yours (6.6% more, even though the battery is theoretically 25% bigger and I've only got about 1/4 the miles and time you have!
...Lance

Coulis Red 2016 SV (312310)
Delivered: 12/23/16
Glacier Pearl 2012 SL (016138)
Delivered: 12/9/11; traded in 12/23/16
NOGA$4ME Blog

leafcaldonie
Posts: 1
Joined: Wed Apr 11, 2018 5:57 pm
Delivery Date: 12 Apr 2018

Re: Post Your Battery Degradation Results

Wed Apr 11, 2018 6:03 pm

Bonjour,

Je confirme cet article de https://insideevs.com/nissan-issues-sta ... gradation/
Nissan Issues Statement On LEAF 30-kWh Battery Degradation

1 D BY ERIC LOVEDAY 107
It’s not quite as detailed as we hoped for, but at least Nissan is fully aware of the concern and is investigating the potential issue.

Earlier this week, we presented the highly detailed findings of an in-depth Nissan LEAF battery degradation study.
Battery Issues – Nissan LEAF 30-kWh Battery Degrades More Rapidly Than 24-kWh Pack

The takeaway from the published results were:

“At two years of age, the mean rate of decline of SoH of 30 kWh Leafs was 9.9% per annum (95% uncertainty interval of 8.7% to 11.1%; n = 82). This was around three times the rate of decline of 24 kWh Leafs which at two years averaged 3.1% per annum (95% uncertainty interval of 2.9% to 3.3%; n = 201).”

Or, in very simplified terms, the 30-kWh LEAF seemed to have much higher battery degradation rates than the 24-kWh LEAFs.

The study concluded by suggesting that the rate of decline in the 24-kWh version of the LEAF is acceptable, but suggests that the 30-kWh pack declines too rapidly to be considered within normal parameters.
Replacement Batteries – Nissan Introduces $2,850 Refabricated Batteries For LEAF

Following the release of the results of this study and our coverage of the potential issue, Green Car Reports reached out to Nissan for comment. EV communication manager, Jeff Wandell, offered this response:

“Nissan is aware that a limited number of customers have expressed concerns with the previous generation of the Nissan LEAF 30-kWh battery.”

“LEAF owners are some of our most devoted customers.”

“We take their concerns seriously, and have technical experts currently investigating the issues raised.”

We’re glad to know that Nissan is looking into this potential issue. We’ll report back if Nissan presents any additional information.

The abstract from the work titled “Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf” contains more details on the issue. It states:

Analysis of 1382 measures of battery State of Health (SoH) from 283 Nissan Leafs (“Leaf/s”), manufactured between 2011 and 2017, has detected a faster rate of decline in this measure of energy-holding capacity for 30 kWh variants.

At two years of age, the mean rate of decline of SoH of 30 kWh Leafs was 9.9% per annum (95% uncertainty interval of 8.7% to 11.1%; n = 82). This was around three times the rate of decline of 24 kWh Leafs which at two years averaged 3.1% per annum (95% uncertainty interval of 2.9% to 3.3%; n = 201).

For both variants there was evidence for an increasing rate of decline as they aged, although this was much more pronounced in the 30 kWh Leafs. Higher use of rapid DC charging was associated with a small decrease in SoH. Additionally, while 24 kWh cars with greater distances travelled showed a higher SoH, in 30 kWh cars there was a reduction in SoH observed in cars that had travelled further.

The 30 kWh Leafs sourced from United Kingdom showed slower initial decline than those from Japan, but the rate of decline was similar at two years of age.

Improvements in the battery health diagnostics, continuous monitoring of battery temperatures and state of charge, and verification of a fundamental model of battery health are needed before causes and remedies for the observed decline can be pinpointed.

If the high rate of decline in battery capacity that we observed in the first 2.3 years of a 30 kWh Leaf’s lifetime were to continue, the financial and environmental benefits of this model may be significantly eroded. Despite 30 kWh Leafs accounting for only 14% of all light battery electric vehicles registered for use on New Zealand roads at the end of February 2018, there is also the potential for the relatively poor performance of this specific model to undermine electric vehicle uptake more generally unless remedies can be found.

Myall, D.; Ivanov, D.; Larason, W.; Nixon, M.; Moller, H. Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf. Preprints 2018, 2018030122 (doi: 10.20944/preprints201803.0122.v1)

Myall, D.; Ivanov, D.; Larason, W.; Nixon, M.; Moller, H. Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf. Preprints 2018, 2018030122 (doi: 10.20944/preprints201803.0122.v1)

Source: Preprints

Nissan statement via Green Car Reports

Category: Nissan

Tags: featured, leaf battery, leaf battery degradation, Nissan LEAF, Nissan LEAF 30 kWh


Par mon expérience personnelle : je viens de perdre une barre d'autonomie sur ma Leaf 30Kwh a 18000Kms ; a 6000Kms j'avais encore 230 Kms d'autonomie alors que maintenant je n'ai plus que 170Kms.(documents joints basés sur Leaf Spy Pro).

Je tiens a votre disposition mes relevés Leaf Spy Pro.

Bien cordialement.

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