Pipcecil
Posts: 810
Joined: Thu Apr 14, 2011 4:15 pm
Location: Midlothian, TX

Re: Tuning the Battery Aging Model

Tue Jun 17, 2014 7:13 am

Pipcecil wrote:Manufactured - 05/11
Delivered - 6/17/11
P3227 update - 6/24/13
Location - Midlothian, TX; Leaf spends 5 days a week in Arlington, TX
Miles/kwh - 4.0
Odometer - 51,040
Capacity - 45.76
Date - 1/28/14
Parked in sun - 5 days/week
Its my 3 year ownership anniversary so I will re-update my car:

Delivered - 6/17/11
P3227 update - 6/24/13
Location - Midlothian, TX; Leaf spends 5 days a week in Arlington, TX
Miles/kwh - 4.0
Odometer - 57,735
Capacity - 43.27
SOH - 65%
Hx - 44.89%
Date - 6/17/2014
Parked in sun - 5 days/week

Still only 3 capacity bars lost.
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91040
Posts: 1012
Joined: Fri Mar 11, 2011 10:36 pm
Delivery Date: 06 May 2011
Location: Los Angeles, CA

Re: Tuning the Battery Aging Model

Tue Jun 17, 2014 10:45 am

Manufactured - 03/11
Delivered - 5/6/11
P3227 update - 8/12/13
Location - Los Angeles, CA (Crescenta Valley)
Miles/kwh - 4.8
Odometer - 74,795
Capacity (Ahr) - 46.62
SOH - 71%
Hx - 50.38
Date - 6/17/2014
Parked in sun - 1 days/week
1st Capacity Bar loss 30k mi 16.25mo
2nd- 49k mi 25.5mo 51.5Ah
3rd- 73k mi 36.5mo 46.9Ah
4th- 86.5k mi 43mo 42.61Ah
5th- 101k mi 50.5mo 38.38Ah, end 36.13Ah
New Battery 9/28/15 104k mi 66.14Ah
1st- 160.5k mi 34mo 54.02Ah

tivollix
Posts: 65
Joined: Wed Apr 03, 2013 6:56 am
Delivery Date: 18 Mar 2013
Leaf Number: 006065

Re: Tuning the Battery Aging Model

Tue Jul 08, 2014 10:33 am

Here is an update 10 month later:

Manufactured - 06/11
Delivered - 3/13
P3227 update - 8/13
Location - Montreal, QC, Canada
Miles/kwh - 4.6 ( 7.5km/kwh )
Odometer - 19375 (31000km)
Capacity (Ahr) - 56.8
SOH - 86%
Hx - 72.35
Date - 7/7/2014
Parked in sun - 3 days/week
2016 Leaf since 21000KM.
2015 for 30000KM
2011 Black SL Leaf. Demo. In service: 2013/03
Sold at 38000 KM

vegastar
Posts: 208
Joined: Mon Dec 13, 2010 11:29 am
Delivery Date: 07 Jul 2011
Leaf Number: 5564
Location: Portugal

Re: Tuning the Battery Aging Model

Tue Jul 15, 2014 9:01 am

My update at 3 years old:

Manufactured: 05/11
Delivered: 07/11
P3227 update: 7/2013
Location: Porto, Portugal
Miles/kW.h: 3.5
Odometer: 47k miles
Capacity: 52,9Ahr
SOH: 80%
HX: 64%
Date: 7/15/2014
Parked in Sun: Never
2011 Nissan LEAF since 2011-07-07, 151000 km on 2018-03-03, 7 bars, 37.9Ah.

sksingh
Posts: 56
Joined: Sat Jan 22, 2011 12:56 pm
Delivery Date: 02 May 2011
Leaf Number: 1755

Re: Tuning the Battery Aging Model

Thu Jul 17, 2014 9:54 pm

Here is an update:


Delivered - 6/11
Odometer - 39400
Capacity (Ahr) - 43.11
SOH - 65%
Hx - 59.02
Date - 7/17/2014
Parked in sun - 5 days/week
SL+QC Black
La Mirada, CA
Charged by 18 Sunpower 327S Solar Array

Stoaty
Posts: 4488
Joined: Fri Jun 18, 2010 9:50 pm
Delivery Date: 12 Jun 2011
Leaf Number: 3871
Location: West Los Angeles

Re: Tuning the Battery Aging Model

Thu Jul 24, 2014 10:00 pm

My Leaf battery pack is weathering this summer very well so far. In the last 2 months I have only lost about 0.5 Ah of capacity. I am still running ahead of the battery aging model, which is very surprising to me since I expected to get behind during the summer and make up the difference the rest of the year:

Van Nuys
5.6 miles/kwh
mileage - 30930
Days in the sun - 4
capacity - 54.13 Ah
Date of reading - 7/24/13
Manufacture - 4/15/11
Delivered - 6/12/11

Predicted Loss - 18.83%
Actual Loss - 18.29%

Actual minus predicted loss = -0.54%

I believe that factors other than climate and mileage affect battery capacity. I have seen there are a couple of people in very similar climate getting battery replacement under warranty or close to it without having much higher mileage. My guess is that keeping average SOC low and driving very conservatively (5.6 miles/kwh) are helping preserve my capacity. However, I have no way to prove my hypothesis. Still on track for 6.5 years (another 3.5 years from now) to 70% capacity remaining.
2011 Leaf with 62,000 miles given to Nephew
2013 Tesla Model S85 with 251 miles rated range at full charge
Leaf Spy Manual
Battery Aging Model Spreadsheet

User avatar
DaveEV
Forum Supporter
Posts: 6239
Joined: Fri Apr 23, 2010 3:51 pm
Location: San Diego

Re: Tuning the Battery Aging Model

Fri Jul 25, 2014 12:31 am

Latest data:

Manufactured - 4/11
Delivered - 6/7/11
P3227 update - 6/28/13
Location - Encinitas, CA (~3 mi inland)
Miles/kwh - 4.5
Odometer - 30500
Capacity - 52.90
Date - 7/25/13
Parked in sun - 5 days/week

Capacity has dropped about 0.5 Ah in the last month and about 0.8 Ah over the last two months.

DaveinOlyWA
Posts: 14223
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Tuning the Battery Aging Model

Tue Jul 29, 2014 7:49 am

Have a Seattle area LEAFer with a bit of an outlier stat

https://www.facebook.com/groups/seattle ... 609234278/" onclick="window.open(this.href);return false;

has 18,200 miles after 3 years 2 months of ownership and has lost a bar.
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; 412 mi, 99.72% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

User avatar
RegGuheert
Posts: 6419
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Tuning the Battery Aging Model

Mon Aug 18, 2014 2:16 pm

It's been a bit over 11 weeks since the P3227 update and the capacity number seems to have stopped its dramatic plummet, so I thought I would finally post some numbers:

Manufactured - 06/11
Delivered - 3/16/12
P3227 update - 5/23/14
Location - Winchester, VA; Leaf spends its time parked in a garage which is often open except in Winter
Miles/kwh - 4.8
Odometer - 20,361
Capacity - 55.55
Date - 8/17/14
Parked in sun - 0 days/week

Vehicle reported loss - 16.15%
Predicted loss - 13.30%
Actual percent of predicted - 121.5%

A couple of notes:

- We have had about the coolest summer on record here, but the P3227 update has managed to "ruin the ride" these last couple of months!
- I took a trip last Friday similar to one I had done about this time of year in 2012. Conditions were similar. In 2012, I arrived at the destination 71 miles away about three miles after LBW. On Friday, I arrived at the destination after 69 miles with 34% SOC remaining. The point being that it sure didn't *feel* like I had lost 16% capacity since 2012; more like I had *gained* 16% capacity.
- OTOH, this winter was also the coldest one we have had in a long time. (Our PV array has been through four winters here and this was the first winter it ever recorded temperatures of 0F or below...and it did it 7 mornings this winter.) At sub-10F temperatures and with high winds, I once left the LEAF home for one 46-mile trip which I normally wouldn't even think twice about taking.

I guess I'll have to wait until next summer to see if my experience matches Stoaty's: rapid drop in reported capacity during the summer following P3227, but very little capacity drop the following summer.
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

Reddy
Posts: 1544
Joined: Fri Feb 11, 2011 3:09 pm
Delivery Date: 18 Aug 2011
Leaf Number: 006828
Location: Pasco, WA

Re: Tuning the Battery Aging Model

Tue Aug 19, 2014 10:58 am

I'm not very knowledgeable about this stuff, but since it was my 3 year ownership anniversary this week, I decided to get the Leaf Spy (lite version only) so I could put out some info about my car/area. For those not familiar with WA state, Pasco is in the hottest, driest part and routinely gets temps above 100 F and often above 110 F. This summer has been a bit hotter and longer than usual, but I'll have to wait until it's over to know for sure.

Date - 8/18/2014
11 capacity bars
Delivered - 8/18/11
P3227 update - 1/10/14
Location - Pasco, WA
Miles/kwh - 4.7 (I normally get 5.2 in summer and 2.5-4.0 in winter)
Odometer - 20,700
Capacity - 54.38 AHr
SOH - 82%
Hx - 67.29%
Parked in sun - 3 days/week (this one is tough since I normally bicycle through the summer and the car sits in an uninsulated garage. However, I still drive it for errands and get lazy at times. I also park outside at night in the summer to help cool the battery as much as possible. I also keep the battery between 40-60% SOC most of the time. However, now that I have LeafSpy, it appears that the outside cooling doesn't really help much, and the %SOC is higher than it would appear from just the number of battery bars)

I have no idea how this might help the Battery Aging Model since any close city (Seattle/Portland/Spokane) has a completely different thermal environment. If I were to guess, maybe I'm closer to Sacramento.
Reddy
2011 SL; 9 bar, 45.80 AHr; 45,000 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

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