Lw4nier
Posts: 6
Joined: Sun Mar 03, 2019 7:20 pm
Delivery Date: 06 Mar 2019
Leaf Number: 307104
Location: Des Moines, IA

Re: The 40KWH Battery Topic

Thu Dec 05, 2019 8:01 pm

I’m going through my 3mo update now. Currently at 91.62 soh.
2018 with 4,170 miles. And try keeping it in the 30-75 soc range. Doesn’t matter what I do, still drops. :oops: :oops:

DaveinOlyWA
Posts: 15178
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Thu Dec 05, 2019 8:09 pm

My degradation basically slowed to a crawl and the seasons had nothing to do with it since it started in April. I traded it in at 25,000 miles and so will be starting the monitoring all over. FYI; on my E Plus, yesterday, I hit 99.66% SOH which is where my 40 kwh started. This should be interesting. ;)
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

danrjones
Posts: 786
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Wed Dec 11, 2019 7:58 am

Looks like I have hit my three month update as my SOH took a big drop this morning. I know there has been speculation that winter shuts down the updates, and my daily drop rate had slowed to a crawl, but still getting a 3 month big adjustment. In a day or two when its done I'll post updated stats but I'm down below 93% now.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

LeftieBiker
Moderator
Posts: 15806
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: The 40KWH Battery Topic

Wed Dec 11, 2019 2:05 pm

California's version of Winter likely doesn't even register on the BMS.
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.

GRA
Posts: 12408
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: The 40KWH Battery Topic

Wed Dec 11, 2019 7:06 pm

LeftieBiker wrote:
Wed Dec 11, 2019 2:05 pm
California's version of Winter likely doesn't even register on the BMS.
Depends where in California - IIRR the record low was -45 deg. F, at a reservoir near Truckee in 1935. I once spent a night a few miles away when that same spot hit -37. I don't know just how cold it was where we were, but my -20 deg. F. rated windshield washer fluid had turned to the consistency of a Slurpee in the reservoir, and wouldn't flow through the hoses to the washer nozzles when I wanted to clean the ice off the windshield. Ridgecrest is sort of middling, being inland, high dry desert with a record low of -17C/1.4 deg. F. Its climate isn't Mediterranean like the coast or Central Valley, but it's not the mountains either: https://en.wikipedia.org/wiki/Ridgecres ... ia#Climate
Last edited by GRA on Sat Dec 14, 2019 4:37 pm, edited 1 time in total.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

danrjones
Posts: 786
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Thu Dec 12, 2019 8:12 am

LOL

My average battery temp the last month has been running around 45-48F or so depending on the time of day.
We actually had snow a week or two ago here.

But certainly its not THAT COLD around here in the winter.

Battery / BMS is continuing its 3 month adjustment, now down to 92.34%.


Doesn't the fact that (for some) winter shuts down the adjustments or the BMS tell us with certainty (AKA CONCLUSIVELY) that the LACK of thermal management is causing issues for the battery? why else would the BMS slow down adjustments when it is cold?

So we just need to keep the battery at about 20F and it would last forever....
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 15178
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Fri Dec 13, 2019 9:28 am

danrjones wrote:
Thu Dec 12, 2019 8:12 am
LOL

My average battery temp the last month has been running around 45-48F or so depending on the time of day.
We actually had snow a week or two ago here.

But certainly its not THAT COLD around here in the winter.

Battery / BMS is continuing its 3 month adjustment, now down to 92.34%.


Doesn't the fact that (for some) winter shuts down the adjustments or the BMS tell us with certainty (AKA CONCLUSIVELY) that the LACK of thermal management is causing issues for the battery? why else would the BMS slow down adjustments when it is cold?

So we just need to keep the battery at about 20F and it would last forever....
Stop listening to what 24 and 30 kwh LEAFers have to say. Your pack is simply different. But the "real" difference is the BMS. Its simply reporting information using a completely different set of rules. I had my biggest negative adjustment happen during the coldest part of the year which coincides with the time of year I did least amount of driving (2717 miles in 3 months).

Then Summer came, I road tripped, cooked the pack, drove 4599 miles in 90 days, hit 12 temperature bars for the FIRST TIME EVER a few times. Did a QC compatibility test of Webasto which was 9 charging stops in one day exceeding 500 miles and my pack stats WENT UP.

With all that in mind; the real question becomes "how well do you think you can predict what your pack will do in the next year?"

You are at 92.30something % SOH? Well, that is about where I was after 21 months of ownership after being at 92.5% after 15 months...

But I am not alone. There are now dozens of us and we all seem to be between 15-21 months and 91 to 93% SOH. We live ALL OVER the World and have rampantly different driving habits, demands and needs.

A year is a long time; What do you think your SOH will be on July 4th?
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

danrjones
Posts: 786
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Fri Dec 13, 2019 11:52 am

DaveinOlyWA wrote:
Fri Dec 13, 2019 9:28 am
danrjones wrote:
Thu Dec 12, 2019 8:12 am
LOL

My average battery temp the last month has been running around 45-48F or so depending on the time of day.
We actually had snow a week or two ago here.

But certainly its not THAT COLD around here in the winter.

Battery / BMS is continuing its 3 month adjustment, now down to 92.34%.


Doesn't the fact that (for some) winter shuts down the adjustments or the BMS tell us with certainty (AKA CONCLUSIVELY) that the LACK of thermal management is causing issues for the battery? why else would the BMS slow down adjustments when it is cold?

So we just need to keep the battery at about 20F and it would last forever....
Stop listening to what 24 and 30 kwh LEAFers have to say. Your pack is simply different. But the "real" difference is the BMS. Its simply reporting information using a completely different set of rules. I had my biggest negative adjustment happen during the coldest part of the year which coincides with the time of year I did least amount of driving (2717 miles in 3 months).

Then Summer came, I road tripped, cooked the pack, drove 4599 miles in 90 days, hit 12 temperature bars for the FIRST TIME EVER a few times. Did a QC compatibility test of Webasto which was 9 charging stops in one day exceeding 500 miles and my pack stats WENT UP.

With all that in mind; the real question becomes "how well do you think you can predict what your pack will do in the next year?"

You are at 92.30something % SOH? Well, that is about where I was after 21 months of ownership after being at 92.5% after 15 months...

But I am not alone. There are now dozens of us and we all seem to be between 15-21 months and 91 to 93% SOH. We live ALL OVER the World and have rampantly different driving habits, demands and needs.

A year is a long time; What do you think your SOH will be on July 4th?
Good info

Actually I have only had the vehicle for 7 months, but it depends on if you count time it was sitting on the dealer lot or not. As of this AM I am at 92.13% so it is still doing its adjustment.

Where will I be July 4th? I do not know. My guess is into the 80's. But you could easily be correct as well. I do not think its even been proven that we are watching "Real" SOH.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 15178
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Fri Dec 13, 2019 2:36 pm

danrjones wrote:
Fri Dec 13, 2019 11:52 am
DaveinOlyWA wrote:
Fri Dec 13, 2019 9:28 am
danrjones wrote:
Thu Dec 12, 2019 8:12 am
LOL

My average battery temp the last month has been running around 45-48F or so depending on the time of day.
We actually had snow a week or two ago here.

But certainly its not THAT COLD around here in the winter.

Battery / BMS is continuing its 3 month adjustment, now down to 92.34%.


Doesn't the fact that (for some) winter shuts down the adjustments or the BMS tell us with certainty (AKA CONCLUSIVELY) that the LACK of thermal management is causing issues for the battery? why else would the BMS slow down adjustments when it is cold?

So we just need to keep the battery at about 20F and it would last forever....
Stop listening to what 24 and 30 kwh LEAFers have to say. Your pack is simply different. But the "real" difference is the BMS. Its simply reporting information using a completely different set of rules. I had my biggest negative adjustment happen during the coldest part of the year which coincides with the time of year I did least amount of driving (2717 miles in 3 months).

Then Summer came, I road tripped, cooked the pack, drove 4599 miles in 90 days, hit 12 temperature bars for the FIRST TIME EVER a few times. Did a QC compatibility test of Webasto which was 9 charging stops in one day exceeding 500 miles and my pack stats WENT UP.

With all that in mind; the real question becomes "how well do you think you can predict what your pack will do in the next year?"

You are at 92.30something % SOH? Well, that is about where I was after 21 months of ownership after being at 92.5% after 15 months...

But I am not alone. There are now dozens of us and we all seem to be between 15-21 months and 91 to 93% SOH. We live ALL OVER the World and have rampantly different driving habits, demands and needs.

A year is a long time; What do you think your SOH will be on July 4th?
Good info

Actually I have only had the vehicle for 7 months, but it depends on if you count time it was sitting on the dealer lot or not. As of this AM I am at 92.13% so it is still doing its adjustment.

Where will I be July 4th? I do not know. My guess is into the 80's. But you could easily be correct as well. I do not think its even been proven that we are watching "Real" SOH.
Yeah as far as when the clock starts is a good question but mine spent zero time on the lot with build date 1/2018 picked up 2/16/18. My first adjustment happened after 74 days so if we assume it was 16 days from manufacture until my delivery date at the dealership...

My prediction for you? Still in the 90's. Maybe another 1% based on your much warmer climate.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

LeftieBiker
Moderator
Posts: 15806
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: The 40KWH Battery Topic

Fri Dec 13, 2019 3:26 pm

My guesstimate of the effect of time before first sale is that if the car isn't fully charged, the loss is tiny. If it is sitting at 100%, or the climate is hot (or both), then the loss is more substantial.
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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