SageBrush
Posts: 4907
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 1:18 pm

https://www.mdpi.com/2076-3417/8/10/1825/pdf

This is a fantastic read, study from 2018
Spoiler: sitting at high SoC in high temperatures is the quick way to cook a battery.
Last edited by SageBrush on Fri Apr 19, 2019 4:07 pm, edited 1 time in total.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

joeriv
Posts: 248
Joined: Sun Mar 24, 2013 1:33 pm
Location: Fairfield County CT

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 1:46 pm

url busted. Edit- Fixed
Last edited by joeriv on Sat Apr 20, 2019 7:37 pm, edited 1 time in total.
2017 Leaf S with QC, JUN mfg date

SageBrush
Posts: 4907
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 3:31 pm

^^
Sorry, I am not sure how to fix the URL but if you copy and paste it into a new tab the file opens.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

LeftieBiker
Moderator
Posts: 13201
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 3:48 pm

Try replacing the "file:" with "http:". It may work for you because you have the file on your home drive. It may not work for us because we don't already have it stored.
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.

cwerdna
Posts: 9725
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 4:01 pm

^^^
Yep. "Home" isn't a valid host name on the Internet. It needs to point a protocol like http, https or ftp and also have a valid hostname.

However, some Googling for the filename helped. Led me to:
https://www.mdpi.com/journal/applsci/sp ... ic_Vehicle
https://www.mdpi.com/2076-3417/8/10/1825
PDF link at the above points to https://www.mdpi.com/2076-3417/8/10/1825/pdf which triggers a d/l.

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

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

SageBrush
Posts: 4907
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 4:05 pm

Try this link. For me it downloads the file to my local hard drive

https://www.mdpi.com/2076-3417/8/10/1825/pdf
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

iPlug
Posts: 420
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Effect of SoC and Temperature on Battery Life

Fri Apr 19, 2019 11:48 pm

What SoC are others keeping their Leafs or other BEVs at here?

My wife drives our Leaf, will usually charge it up to 100% when it gets to 20-50% SoC. It rarely sits at 100% SoC for very long, usually driven within 12 hours after achieving such.

With our new Model 3, have read that Musk says ok to leave it at ~80% max SoC where I have also kept it max charged, but wonder if lower is better. Since I only travel <25 miles on 90%+ of days, will probably keep it around 50% SOC and max charge it right before the rare long road trips.
'19 Model 3 SR+ (own), '19 Leaf SV (leased), '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr real production), 20.5 SEER/13.0 HSPF ducted air-source heat pump, 3.70 UEF heat pump water heater, Induction Cooktop

LeftieBiker
Moderator
Posts: 13201
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Effect of SoC and Temperature on Battery Life

Sat Apr 20, 2019 12:01 am

I rarely charge to an indicated 100%. I keep my 40kwh Leaf at 50-80%, generally. Usually around 65%.
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.

SageBrush
Posts: 4907
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Effect of SoC and Temperature on Battery Life

Sat Apr 20, 2019 4:13 am

iPlug wrote: With our new Model 3, have read that Musk says ok to leave it at ~80% max SoC where I have also kept it max charged, but wonder if lower is better. Since I only travel <25 miles on 90%+ of days, will probably keep it around 50% SOC and max charge it right before the rare long road trips.
I think you are doing fine.

I mostly do the same although I bumped up the charge limit to 90% a week ago to improve range calibration. I'll drop it down to 70-80% in a few weeks. As summer approaches I'll drop the charging limit further since I think the message here is to not combine high SoC with extended time at high temperature. Since I no longer use the Tesla every day it has become more important to pay attention to this issue.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

joeriv
Posts: 248
Joined: Sun Mar 24, 2013 1:33 pm
Location: Fairfield County CT

Re: Effect of SoC and Temperature on Battery Life

Sun Apr 21, 2019 10:47 am

If you read the study, the conclusion:

"The final conclusion from this study is that there is a huge potential for prolonging the battery lifetime by avoiding high SOC values. Additional prolonging of the lifetime can also be reached by only charging the battery with the needed energy, using a small DOD, and to do this just before the driving. This strategic planning of the charging will limit the impact from the calendar ageing."

For those of us who use a BEV for local driving, keeping the battery at something like 30-60% SOC and charging only as much is needed to maintain this range will significantly increase battery life. It also suggests, all things being equal, the larger the battery the better.
2017 Leaf S with QC, JUN mfg date

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