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OrientExpress
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Posts: 1213
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 1:54 pm

John, It's doubtful that you really know how your battery was preforming, as the controller was presenting data that was based on faulty calculations that affected the presented SOC, Capacity, and range. This is what the fix is all about.

I have reached out to Nissan for more information about this, and as soon as I get their response, I will post it. BTW, Nissan is calling this fix a "Customer Service Campaign" and not a recall.

Nissan has know about this issue since last fall, and has been working on the fix, making sure that it is an actual fix. In the mean time, customers whose cars presented the excessive degradation were provided with replacement batteries. But those cars will still need to get the SW fix, and of course the battery warranty still is in place.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

edatoakrun
Posts: 5222
Joined: Thu Nov 11, 2010 9:33 am
Delivery Date: 15 May 2011
Leaf Number: 2184
Location: Shasta County, North California

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 2:07 pm

johnlocke wrote:I can assure you that my battery loss was not a "Phantom Loss"...

Of course you pack has lost capacity, the question is how much.

johnlocke wrote: My range decreased from 90 miles at VLBW to 65 miles at VLBW...

And, even if the ranges you state correspond to capacity accurately (it's a lot simpler if you learn to state capacity in kWh instead of "miles") and the additional range available from VLBW to shutdown was ~10 "miles" when new, and increased to ~12 "miles" by the time you lost bar nine, your range-determined loss of available capacity was 73/100, or ~23%, not the 38%, as you insist:

johnlocke wrote: Four bars down is actually 62% of original capacity...

For comparison, when My pack lost its ninth bar, at ~seven years and ~60k miles from delivery, it had ~24% lower available capacity than Nissan specified, while my LBC showed a ~36% loss of capacity.

However, since all evidence suggests most "24 kWh" 2011-12 LEAFs (including my own) actually had deficient capacity when new, I'm fairly sure my pack had not actually lost the full 24% of available or total capacity, from delivery.
no condition is permanent

jbuntz
Posts: 138
Joined: Thu Dec 08, 2016 5:41 am
Delivery Date: 17 Dec 2016
Leaf Number: 303765
Location: New Braunfels, TX

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 2:53 pm

And why is it that it is only cars in TX Fl AZ So Cal are the ones that have the BMS problems ??
Mfg 11/15 Del 12/16 TX 2016 SL 30kWh,
Date Bar MI GID Ahr SOH
05/17 12 05175 324 70.75 89
08/17 11 09245 282 61.68 77
10/17 10 12000 260 57.22 71
01/18 09 15329 244 53.72 68
06/20 08 21716 230 50.41 63
06/27 11 22047 296 66.01 83 Aftr Updt

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OrientExpress
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Posts: 1213
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 3:00 pm

I've seen reports from all over the US and in other geographies as well.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

SageBrush
Posts: 2800
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: Colorado

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 5:08 pm

WetEV wrote:
OrientExpress wrote:The issue is that a battery presenting 2-4 lost bars, actually still has its nominal capacity, so the consumer hasn't lost anything at all. That is the issue, batteries that still had their nominal capacity for their age and mileage were displaying accelerated capacity loss when in reality they didn't have that loss at all.


I'd like to see a recharge or range test done by a third party (such as one or more MNL regulars) to convince me that this is just mostly a reporting/BMS measuring flaw.

Yep
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

User avatar
OrientExpress
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Posts: 1213
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 5:18 pm

SageBrush wrote:
WetEV wrote:
I'd like to see a recharge or range test done by a third party (such as one or more MNL regulars) to convince me that this is just mostly a reporting/BMS measuring flaw.

Yep


I take it that you are volunteering to do this test and report your findings?
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

webeleafowners
Posts: 517
Joined: Mon Oct 05, 2015 5:37 pm
Delivery Date: 06 Oct 2015
Location: Okanagan Valley British Columbia

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 6:20 pm

So, I am not following. Can someone summarize.

* Am I to understand that there is a recall type campaign that somehow affects the BMS?

* Is the degradation on the 2016 batteries real or is it just reporting incorrectly.

* Does this fix somehow restore the battery or just prevent further degradation.

Please be patient with me. Reading various sources and not seeing any consistency.

Thanks all.

John
2015 Smart Electric Drive convertible.
2016 Nissan Leaf SV 30KWh
EV only Family...well except for the big diesel motorhome. :shock:

cwerdna
Posts: 8218
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 6:31 pm


'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

ElectricEddy
Posts: 479
Joined: Tue Feb 25, 2014 1:42 pm
Delivery Date: 31 Oct 2016
Leaf Number: 313506
Location: Nanaimo, B.C.

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 6:34 pm

webeleafowners wrote:So, I am not following. Can someone summarize.

* Am I to understand that there is a recall type campaign that somehow affects the BMS?

* Is the degradation on the 2016 batteries real or is it just reporting incorrectly.

* Does this fix somehow restore the battery or just prevent further degradation.

Please be patient with me. Reading various sources and not seeing any consistency.

Thanks all.

John

I don't think it's going to make the pack temp any cooler after multiple QC but might add some stability to the GOM , I hope it does't slow the charge rate like the 2018's.
https://www.mynissanleaf.com/viewtopic. ... 8&start=10
IHave not yet been contacted by Nissan regarding this

Edit cwerdna beat me to post the link
Pearl White Sl
mfd date 09/16

User avatar
OrientExpress
Forum Supporter
Posts: 1213
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: 2016-2017 model year 30 kWh bar losers and capacity losses

Wed Jun 13, 2018 6:42 pm

The customer communication will be going out by mail directly.

Here is the documentation provided to the dealer service centers:

Image

Image

Image

The bottom line is that the BMS is providing bad calculated data to the rest of the cars systems. This SW patch corrects that.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

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