philip
Posts: 127
Joined: Tue Nov 27, 2012 8:18 pm
Delivery Date: 25 Aug 2015
Leaf Number: 327341
Location: El Cajon, CA

Re: 2015: Battery Data Report @ 100% Charge

Fri Nov 09, 2018 11:48 am

Being in Texas, heat will be the largest factor that shortens battery life. If you are okay with only charging to 80%, then keep doing it, it won't hurt anything.

The following paper shows that a lower charge voltage is better for longevity than a higher one (even if slight): https://www.researchgate.net/publicatio ... Assessment). The data they present show that the batteries that were cycled from 100% SOC had accelerated capacity loss when the battery was new, but eventually the degradation follows the same rate as those batteries that terminated charge at 85% on Page 7. They speculate that this initial rapid degradation may have been caused by overcharging early in the tested batteries life, but they don't have data on that. When they adjust that early degradation out, it shows only a couple % difference in degradation between the 100% charged and 85% charged batteries that had the same DOD after many cycles.

According to the data presented, there will be a slight advantage to maintaining a lower SOC as far as battery lifetime. So slight, that you may get an extra month or two of life out of the battery over a five year battery lifetime.

I suspect for my use case (and probably yours), being in a warm climate, that charging to 80 vs 100 will make very little difference in the total lifetime of the battery.
2015 SV
Old 11/11/15: 2012SL, SOH76% 49.97AHr 35,644mi vin 26790
LEAF press kits

tattoogunman
Posts: 211
Joined: Tue Jun 07, 2016 6:17 pm
Delivery Date: 08 Jun 2016
Location: Plano, Texas

Re: 2015: Battery Data Report @ 100% Charge

Sun Nov 11, 2018 7:28 pm

philip wrote:Being in Texas, heat will be the largest factor that shortens battery life. If you are okay with only charging to 80%, then keep doing it, it won't hurt anything.

The following paper shows that a lower charge voltage is better for longevity than a higher one (even if slight): https://www.researchgate.net/publicatio ... Assessment). The data they present show that the batteries that were cycled from 100% SOC had accelerated capacity loss when the battery was new, but eventually the degradation follows the same rate as those batteries that terminated charge at 85% on Page 7. They speculate that this initial rapid degradation may have been caused by overcharging early in the tested batteries life, but they don't have data on that. When they adjust that early degradation out, it shows only a couple % difference in degradation between the 100% charged and 85% charged batteries that had the same DOD after many cycles.

According to the data presented, there will be a slight advantage to maintaining a lower SOC as far as battery lifetime. So slight, that you may get an extra month or two of life out of the battery over a five year battery lifetime.

I suspect for my use case (and probably yours), being in a warm climate, that charging to 80 vs 100 will make very little difference in the total lifetime of the battery.
Yeah, that was sort of what I was thinking, but I obviously want to mitigate it as much as possible. Given my limited driving, I could probably get away with 60%-70% SOC for my daily driving (gives me a bit of a buffer just in case). I'm already noticing the cold making an impact on range over the last few days since it's dropped into the 30's and 40's, so I feel more comfortable with 80% (+/-).

tattoogunman
Posts: 211
Joined: Tue Jun 07, 2016 6:17 pm
Delivery Date: 08 Jun 2016
Location: Plano, Texas

Re: 2015: Battery Data Report @ 100% Charge

Sun Nov 18, 2018 1:37 pm

Lost my first bar today at around 82.07% SOH and three weeks of ownership :( I'm still under warranty until 2020, so the faster the better probably :)

evtifosi
Posts: 42
Joined: Sun Sep 27, 2015 8:15 pm
Delivery Date: 30 Sep 2015
Location: Monterey Bay/Central Coast, CA

Re: 2015: Battery Data Report @ 100% Charge

Fri Jan 04, 2019 4:46 pm

Latest Numbers From Jan 2019:

SOC=93.6%
AHr=52.93
SOH=85.24%
Hx=74.40%

ODO=11,008 mi

Might be getting close to the magic bar loss zone - not that bad for 3+ years I guess...
2015 SV Leaf - 1 bar lost as of 1/2019

cwerdna
Posts: 9758
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: 2015: Battery Data Report @ 100% Charge

Sat Jan 12, 2019 8:59 pm

Relayer1956 wrote:I finally lost the 3rd bar yesterday 1/27/18. My 2015 Leaf SL stats were:

Mileage: 45,575
kWh: 15.4
SOC: 96%
GIDs: 199
SOH: 69%
Hx: 43.84%
Ah: 43.0

So I’m on track for a warranty battery replacement in 2018.
Did you end up losing your 4th bar yet?

'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.

Relayer1956
Posts: 27
Joined: Fri Jan 17, 2014 6:13 pm
Delivery Date: 02 Sep 2014
Leaf Number: 304279
Location: Indio, CA

Re: 2015: Battery Data Report @ 100% Charge

Sat Jan 12, 2019 10:12 pm

Actually I did just a few days ago on 1/7/19. I've been meaning to post about it.

Mileage: 52,722
kWh: 14.1
SOC: 96.6%
GIDs: 182
SOH: 63%
Hx: 34.75%
Ah: 39.22
Mike McNamara, P.E.
Indio, CA
2015 Grey Leaf SL (8 bars visible & 38% capacity lost);
2017 Chevy Bolt Premium;
2012 BMW R1200GS Adventure
18.0kW PV Solar System

cwerdna
Posts: 9758
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: 2015: Battery Data Report @ 100% Charge

Sat Jan 12, 2019 10:15 pm

^^^
Thanks!

'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.

evtifosi
Posts: 42
Joined: Sun Sep 27, 2015 8:15 pm
Delivery Date: 30 Sep 2015
Location: Monterey Bay/Central Coast, CA

Re: 2015: Battery Data Report @ 100% Charge

Sun Jan 13, 2019 10:01 am

This was not a good week for our Leaf...

We finally lost the first bar - like I thought would happen - right about 11,050 miles and 3 years, 3 months of ownership.

We also were side swiped in a parking lot on the rear bumper which left some scratches and gouges in the bumper cover...and they didn't leave a note or anything.

Plus, we hit a curb and gouged up one rim a little...
2015 SV Leaf - 1 bar lost as of 1/2019

User avatar
mwalsh
Posts: 9644
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: 2015: Battery Data Report @ 100% Charge

Sat Feb 02, 2019 8:47 pm

Lost bar 12 on my warranty replacement pack today. 3 years one month, and probably 22,000 miles. Was too harried today to get numbers for you, but will try tomorrow or Monday.

That's about 8 months more than it took on the old pack to lose the first bar, but about 10k fewer miles (my driving needs changed substantially coincidental with getting the new pack).
2011 Blue Ocean SL with 83,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

ixnay
Posts: 26
Joined: Mon Jan 22, 2018 11:21 pm
Delivery Date: 26 Mar 2019
Leaf Number: 326087
Location: Beaverton, OR

Re: 2015: Battery Data Report @ 100% Charge

Wed Mar 27, 2019 10:51 am

2nd Owner on 2/2015 Leaf; 28,507 miles; First full charge, using L2 at home, was last night.

Gids SOC AHr SOH Km
271 970853 578772 93.2 45878

At purchase 3 weeks ago, SOH was 95.18.

Return to “Range / Efficiency / Carwings”