kovadam
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Joined: Wed Jun 06, 2018 12:07 am
Delivery Date: 28 Sep 2018
Location: Hungary, Europe

Re: The 40KWH Battery Topic

Mon May 13, 2019 12:21 am

Hi!

Strange thing happened in the last two days. From Saturday to Sunday the SOH dropped from 96.91% to 96.70%, then from Sunday to Monday the SOH dropped to 97.48%. Without any reason.
The car was not QC-d, the battery was not overheated, I charged using L1 charger (220V/10A) from Friday to Saturday to 92% SOC (from around 40-50%, used 8 hours of charging with the charge timer) and did not even use the car on the weekend, despite this, the SOH dropped 0.5%. Also Hx dropped from 114.58% to 114.23%.

Funny thing, that with a full charge I still get over 97% capacity, if I check the GIDs. I still can charge over 485 GIDS (488-490 some times, which is 97.6-97.8%, for a couple weeks ago I was able to charge till 38.1kWh capacity, which is way over 98%) which is 97.4% or above, and over 37kWh estimated capacity.

I think SOH & Hx are totally wrong with the new Leaf, and since the battery chemistry is totally different from the previous models, also the values mean totally different things, or are not even meaning anything regarding SOH, they are only some numerical data read from the CAN and interpreted as SOH, because it showed some correlation between bar lost and SOH value drop in the past, but only Nissan Engineers know what this values mean.

LeftieBiker
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Re: The 40KWH Battery Topic

Mon May 13, 2019 12:36 am

Strange thing happened in the last two days. From Saturday to Sunday the SOH dropped from 96.91% to 96.70%, then from Sunday to Monday the SOH dropped to 97.48%. Without any reason.
That last number is higher, not lower...

I agree that Hx is now useless (if it was ever really useful) but SOH seems to still be valuable, at least if you don't count very small changes as significant. BTW, if the above increase with the last number isn't a typo, that would be, I think, the first rise in SOH for a 40kwh pack we've seen.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

DaveinOlyWA
Posts: 14107
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Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Mon May 13, 2019 6:21 am

kovadam wrote:Hi!

Strange thing happened in the last two days. From Saturday to Sunday the SOH dropped from 96.91% to 96.70%, then from Sunday to Monday the SOH dropped to 97.48%. Without any reason.
The car was not QC-d, the battery was not overheated, I charged using L1 charger (220V/10A) from Friday to Saturday to 92% SOC (from around 40-50%, used 8 hours of charging with the charge timer) and did not even use the car on the weekend, despite this, the SOH dropped 0.5%. Also Hx dropped from 114.58% to 114.23%.

Funny thing, that with a full charge I still get over 97% capacity, if I check the GIDs. I still can charge over 485 GIDS (488-490 some times, which is 97.6-97.8%, for a couple weeks ago I was able to charge till 38.1kWh capacity, which is way over 98%) which is 97.4% or above, and over 37kWh estimated capacity.

I think SOH & Hx are totally wrong with the new Leaf, and since the battery chemistry is totally different from the previous models, also the values mean totally different things, or are not even meaning anything regarding SOH, they are only some numerical data read from the CAN and interpreted as SOH, because it showed some correlation between bar lost and SOH value drop in the past, but only Nissan Engineers know what this values mean.
Well, when it happens again in approximately 90 days, it will be less strange. My Hx is over 120
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 15,000 miles, 478 GIDs, 37.0 kwh 109.81 Ahr , SOH 94.61, Hx 120.15
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

Jerryr
Posts: 77
Joined: Mon May 14, 2018 8:18 am
Delivery Date: 12 May 2019
Leaf Number: 310009
Location: Bradenton, Florida

Re: The 40KWH Battery Topic

Mon May 13, 2019 6:54 am

Just as a point of reference. My brand 2019 SL Plus w/62 kWh battery, manufacture date 2/19. 46 miles on odometer after driveling it home from dealership.

Image

Image
2019 SL Plus 5/19- current
2018 SV w/tech and All Weather pkg 5/18-4/19 (traded)
2015 SL 4/15-5/18 (traded)
2019 Ford F-350 Lariat Ultimate CCSB SRW Diesel
2015 Lexus RX450h
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kovadam
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Joined: Wed Jun 06, 2018 12:07 am
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Location: Hungary, Europe

Re: The 40KWH Battery Topic

Mon May 13, 2019 7:25 am

Sorry, it was a typo, 96.48, but after I left work in afternoon it was only 96.41%, so within 10 hours it dropped again 0.07% without any reason, the Hx dropped again a bit. Will see how this evolves, the car is 6 months old and has around 14000km on ODO.

LeftieBiker
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Re: The 40KWH Battery Topic

Mon May 13, 2019 1:59 pm

Just as a point of reference. My brand 2019 SL Plus w/62 kWh battery, manufacture date 2/19. 46 miles on odometer after driveling it home from dealership.
The 98.96 SOH may be an indication that the 62kwh pack loses capacity at at least the same rate as the 40kwh pack. Where do you live, Jeryr?
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.

Jerryr
Posts: 77
Joined: Mon May 14, 2018 8:18 am
Delivery Date: 12 May 2019
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Re: The 40KWH Battery Topic

Mon May 13, 2019 3:12 pm

LeftieBiker wrote:
Just as a point of reference. My brand 2019 SL Plus w/62 kWh battery, manufacture date 2/19. 46 miles on odometer after driveling it home from dealership.
The 98.96 SOH may be an indication that the 62kwh pack loses capacity at at least the same rate as the 40kwh pack. Where do you live, Jeryr?
Tampa Florida area.
2019 SL Plus 5/19- current
2018 SV w/tech and All Weather pkg 5/18-4/19 (traded)
2015 SL 4/15-5/18 (traded)
2019 Ford F-350 Lariat Ultimate CCSB SRW Diesel
2015 Lexus RX450h
2017 Grand Design RV 337RLS 5th wheel

LeftieBiker
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Re: The 40KWH Battery Topic

Mon May 13, 2019 3:13 pm

Thanks. That's helpful information.
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.

danrjones
Posts: 320
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Mon May 13, 2019 3:41 pm

So far - knock on virtual wood here - I've noticed my SOH decreasing by about 0.01 about every 2 days, regardless of miles. I guess that would come out to a 2% decrease per year, assuming my drop is even statistically relevant at this point. That would be a 20% loss of SOh in the 10 year warranty period, which is not enough to get a new battery. of course we aren't even close to the hottest time of the year yet. Only been in the low 90's so far.

I have been googling for 2020 leaf info but haven't found much yet. My plan since I got such a good deal on this one is to trade it in in a year or two for a new one with more range, so I'm curious what 2020 will bring.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

LeftieBiker
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Re: The 40KWH Battery Topic

Mon May 13, 2019 3:53 pm

I would expect your degradation to be less linear and more dependent on temperature, so little capacity loss in the cooler months, and much more in the hot months. How much more? I don't know - I tried my best to keep my car's pack cool in the hottest weather, and I have a 40kwh Leaf. Please keep us posted, maybe in a new, 62kwh battery topic...?
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.

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