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

Re: The 40KWH Battery Topic

Mon Aug 10, 2020 7:42 am

No updates in this thread for awhile, I guess everyone has those "+" models now!

Stats as of this AM, the summer keeps chipping away at my SOH.

SOH: 89.45%
AMPHr: 103.26
Hx: 108.43
Mileage: ~ 6800 miles

IF, and that's a big IF, I have any more of those 3 month adjustments the next one would be around Sept 18th.
But not sure I will have any more of those as my last one in June was basically nothing.
The summer definitely seems to impact the battery, or the BMS, as I am loosing .01 or even .02 SOH each day.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DougWantsALeaf
Posts: 2200
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: The 40KWH Battery Topic

Mon Aug 10, 2020 10:22 am

Even us Plus owners see similar activity. My S+ is down .3 over the past 2 months (now 98.2%), and my SV+ is down .36 since mid may (94.29%). Both cars are up for their quarterly updates in about a week.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% 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

SageBrush
Posts: 5394
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: The 40KWH Battery Topic

Mon Aug 10, 2020 10:48 am

lorenfb wrote:
Tue Jul 14, 2020 9:47 am
Why worry about HX, with the Leaf2 it's meaningless?
Why ?
I understand that it has little importance, but not meaningless
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

jmurtagh13
Posts: 25
Joined: Sun Nov 01, 2015 4:54 am
Delivery Date: 10 Mar 2018
Leaf Number: 300844
Location: Atlanta GA

Re: The 40KWH Battery Topic

Mon Aug 10, 2020 5:54 pm

Image

21,050 Miles and 29 Months.

Experienced a large negative update the previous month of -1.13%. This last month the loss was -0.14 which is higher than many of the last monthly losses for the last year. Heat seems to be a big factor. It has been hotter here in Atlanta this summer. Also the car now sits outside in my driveway during the day versus a cooler underground parking garage. This started at beginning of March when I started working from home. My guess is the BMS does a battery health check about every three months, makes an adjustment if necessary, then sets the new calculated rate of loss for the next three months based on the new health number and actual rate of loss for the previous three months. That new rate will likely vary based on other parameters like charging cycles, types of charges and temperature. Anyway that's my theory.
2018 Leaf March 10, 2018
32 months, 23,543 miles
SOH 89.59

DougWantsALeaf
Posts: 2200
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: The 40KWH Battery Topic

Mon Aug 10, 2020 6:24 pm

Thank you for the chart. Many of us have been trying to figure out the quarterly algorithm.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% 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

DaveinOlyWA
Posts: 15158
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

Mon Aug 10, 2020 7:51 pm

jmurtagh13 wrote:
Mon Aug 10, 2020 5:54 pm
Image

21,050 Miles and 29 Months.

Experienced a large negative update the previous month of -1.13%. This last month the loss was -0.14 which is higher than many of the last monthly losses for the last year. Heat seems to be a big factor. It has been hotter here in Atlanta this summer. Also the car now sits outside in my driveway during the day versus a cooler underground parking garage. This started at beginning of March when I started working from home. My guess is the BMS does a battery health check about every three months, makes an adjustment if necessary, then sets the new calculated rate of loss for the next three months based on the new health number and actual rate of loss for the previous three months. That new rate will likely vary based on other parameters like charging cycles, types of charges and temperature. Anyway that's my theory.
You are 9 of 15 over 2 years that is in the "90's" and I mean between 90.00 and 90.99% SOH. Being in Atlanta, you are simply another example of heat not being an extreme factor. Looking like time and likely average SOC is the key factors. I know a guy in WA who got his about the same time as you. Has nearly 60,000 miles and his last report he was like 90.77% SOH.

The other 5? Well, two are in GB and are still 93 and 94% SOH. One in Canada at 94% and then two one at 86%, the other at 88%.
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; 14,342.8 mi, 93.16% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

SageBrush
Posts: 5394
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: The 40KWH Battery Topic

Tue Aug 11, 2020 7:21 am

DaveinOlyWA wrote:
Mon Aug 10, 2020 7:51 pm
I mean between 90.00 and 90.99% SOH.
Funny. Give him a month.

I doubt that Nissan has changed its stripes: the warranty is tightly bound to expected battery degradation of the fleet. When the battery warranty was changed from 5 years to 8 years it implied a fleet improvement in annual degradation from ~ 6% a year to 4%. I doubt this is heat tolerant chemistry and it sure isn't improved cooling so perhaps it is less DCFC as the battery size grows, and less swings into really high battery temperatures.
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

iPlug
Posts: 460
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: The 40KWH Battery Topic

Tue Aug 11, 2020 7:35 am

2019 40kWh Leaf SV
Purchased Jun 2019
Mfg: Mar 2019

6/8/19:
AHr= 114.24
SOH= 98.96%
Hx= 97.66%
Odo= 15 mi
QC= 4
L1/L2= 2

8/3/19:
AHr= 113.21
SOH= 98.07%
Hx= 106.56%
Odo= 986 mi
QC= 4
L1/L2= 21

8/10/20:
AHr= 107.53
SOH= 93.15%
Hx= 102.43%
Odo= 7,922 mi
QC= 22
L1/L2= 147

We've been much more careful with this Leaf. No L1, L2, or DC fast charging at high battery temps, avoiding charging at home with high ambient temperatures, and avoiding leaving battery sitting charged at high SOC. No road tripping. Only use DCFC at local stations after the vehicle has been idle since the prior day.

Wife treated the prior 30 kWh Leaf more often without kid gloves, more often just plug and drive as convenient. That didn't go too well for that battery.
'19 Model 3 SR+, '19 Leaf SV, '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr prod.), 20.5 SEER/13.0 HSPF ducted air-source HP, 3.70 UEF HPWH, Induction Cooktop, Variable Speed Pool Pump, Battery powered yard tools

SageBrush
Posts: 5394
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: The 40KWH Battery Topic

Tue Aug 11, 2020 8:55 am

iPlug wrote:
Tue Aug 11, 2020 7:35 am
Only use DCFC at local stations after the vehicle has been idle since the prior day.
Do you mean DCFC before the drive of the day ? What is the car battery temp after the charge and drive ?
Since it is only a local car I'm not sure why DC fast charging is needed. It sure seems like something to avoid in the summer if possible.

At our home, we set the LEAF to finish charging at 6:30 am during the summer. That way the charging is during the cool(er) early AM hours.
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

iPlug
Posts: 460
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: The 40KWH Battery Topic

Tue Aug 11, 2020 9:33 am

SageBrush wrote:
Tue Aug 11, 2020 8:55 am
iPlug wrote:
Tue Aug 11, 2020 7:35 am
Only use DCFC at local stations after the vehicle has been idle since the prior day.
Do you mean DCFC before the drive of the day ? What is the car battery temp after the charge and drive ?
It's only been used as a local car, wife's - who is still too nervous to take it out of home charging range by herself. She's gone as far as 100-150 miles round trip a couple times and panicked because issues with DCFC and L2 being down or occupied when she got there.

The reason we even do DCFC is because we have 2 years "no-charge-to-charge". So just getting free electricity in the morning when the wife goes out for local errands at an EVGO station.

Have not checked the battery temps after DCFC. On our 40 kWh Leaf there don't seem to be discrete bars like our prior 30 kWh Leaf. On the few times I have looked, the battery was not in the red zone.

The vehicle is cold soaked overnight and only driving a few miles until the DCFC for local shopping then probably only <30 miles driven on it the rest of the day. She also does not charge up to 100% SOC with DCFC.

SageBrush wrote:
Tue Aug 11, 2020 8:55 am
Since it is only a local car I'm not sure why DC fast charging is needed. It sure seems like something to avoid in the summer if possible.
Yes but free. :D
If we owned the vehicle instead of leased again (3 year), and knowing the Leaf battery history, yeah would likely avoid that entirely.
SageBrush wrote:
Tue Aug 11, 2020 8:55 am
At our home, we set the LEAF to finish charging at 6:30 am during the summer. That way the charging is during the cool(er) early AM hours.
Similar here. Temps in our garage coolest just before sunrise. She usually plugs it in ~7 am in the summer to charge up a couple hours.
'19 Model 3 SR+, '19 Leaf SV, '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr prod.), 20.5 SEER/13.0 HSPF ducted air-source HP, 3.70 UEF HPWH, Induction Cooktop, Variable Speed Pool Pump, Battery powered yard tools

Return to “Batteries & Charging”