2015: Battery Data Report @ 100% Charge

[tivollix]

I was down to 58AH with my 8 month old 2015 Leaf (built in february 2015).

A week after a week-end drive of 400KM with 2 ChaDemo charge needed and using the pack down to 7%, I am back to much better numbers.

Measurement after some pre-heating and not fully charged:
288GID
61,72AH
SOH 99%
Hx 95,38%
22,3KWH
odo =12644 KM

A week before it was:

276GID
21,4KWH
58,79AH
SOH 94%
Hx 90,54%
odo = 11650KM

Could it be that the BMS is not good at tracking slow charges and stays on the safe side?

 

[LeafMuranoDriver]

After looking at many stats, it seems strange most of my stats are low while the SOH is still 99%. Does that mean my other stats could come back? Anybody else see high SOH but all other stats low?

I think the temps will really be coming down in the SoCal area and I'm hoping my stats improve.

 

[tkdbrusco]

Recent stats from my 2015 S (mfg 4/14) so its one of the first 2015 models. Purchased 8/14.

With 19,500mi numbers starting to drop. However they were around this low last winter when the car only had about 6,000mi on it. I'm hopeful they come back up in the spring, but I'm not terribly optimistic.

276 Gids
21.39 kwh
97.22 SOC
88.52 SOH
90.3 HX
58.65 Ahr
73.9 degrees F

Considering hidden capacity of the battery, this is about a 5% drop from the 292 it was reading when new. Considering that the full GIDS drop during the cooler weather, I'd be willing to bet that it will come up a little in the Spring, but probably not much past 280. My prediction on this pack is about 3-4% loss per year for the average driver with 12,000k annual miles. This puts the first bar drop at somewhere around 45K miles and 3-4 years for most people, better than earlier gen packs, but nothing spectacular.

It seems like I'm one of the early adopters of the 2015 and we drive ours quite a bit so I bet that I'll be one of the few to drop my first bar in the next two years. At this rate I'm guessing it goes at about 50K miles, sometime around July 2017.

 

[tkdbrusco]

I was down to 58AH with my 8 month old 2015 Leaf (built in february 2015).

A week after a week-end drive of 400KM with 2 ChaDemo charge needed and using the pack down to 7%, I am back to much better numbers.

Measurement after some pre-heating and not fully charged:
288GID
61,72AH
SOH 99%
Hx 95,38%
22,3KWH
odo =12644 KM

A week before it was:

276GID
21,4KWH
58,79AH
SOH 94%
Hx 90,54%
odo = 11650KM

Could it be that the BMS is not good at tracking slow charges and stays on the safe side?

I noticed that the first 288 number said "not fully charged". I've noticed that if you sometimes take a reading during the last bit of charging (the cell balancing portion), you will sometimes get a slightly higher reading then if you let it do the full cycle.

 

[jwalbaum]

Wow, jwalbaum! Great stats! Your climate must have something to do with it. Highest reading of 82!

I spent the majority of the summer at 6 temp bars and hit 7 a handful of times. Just recently I finally got back to 5 temp bars but will hit 6 at the peak temp of the day.

Is 4-5 temp bars the sweet spot?

I usually have 5-6 bars in the summer. I have an insulated garage I keep it in, which helps keep the car at a more stable temp. I think it also helps that the car is driven every day from 100% down to about 30% and then recharged at 6kW. Stats seem to improve when the battery is cycled regularly at cooler temps.

Its also worth noting that real life range has not changed at all for the last 19k miles.

 

[LeafMuranoDriver]

I'm starting to get disappointed in the latest stats. I'm down 6-8% on various metrics from my best in only 6 months and less than 4,000 miles.
(GIDs -6.5%, kWh -6.2%, Hx -8.3%) My SOH and SOC have barely budged though.

The summer was hot but the last 2 weeks have started to cool down. I thought I'd see the stats stay the same and start to trend up but they're still going down. I've been charging to 100% lately but I always drive it down to 80% or less within a few hours.

Date: 10/28/2015
Mfg: 01/2015 Pur: 05/2015
Mileage: 3,859
11 QC & 84 L1/L2s

GIDs: 273 (93.5%)
kWh: 21.2
SOC: 97.3%
SOH: 99%
Hx: 89.14%
AHr: 58.06

WOW! Only 1 week and 1 L2 charge later, stats dropped even more while it's been in the 50-70's the past week.

Mileage: 3,925
11 QC & 85 L1/L2s

GIDs: 269 (92.1%) (Down 1.5% from last week and 7.9% from best)
kWh: 20.8 (Down 1.9% from last week and 8% from best)
SOC: 97.3% (staying the same)
SOH: 99% (staying the same)
Hx: 87.61% (Down 1.7% from last week and 9.9% from best)
AHr: 57.32 (Down 1.3% from last week and 9.2% from best)

Am I not driving it enough? Some days I only drive 4-5 miles. My lifetime average (6 months) is only about 21.2 miles/week.

 

[Bufordleaf]

I am definitely starting to notice a decline in stats, especially over the last 2 months. That seems odd to me since it has been cooling off in Georgia, I thought if anything that would help. Could there perhaps be a delay of several months between hot weather and the degredation that follows? At any rate, here's my latest:

2015 Leaf S w/QC
Odo: 9892
Gids: 280
kWh: 21.7
Soc: 97.2
SOH: 95 (was still 100 2 months ago!)
Hx: 91.71 (was 97.22 2 months ago)
AHr: 59.50 (was 63.09 2 months ago)
Av Tmp: 69.6 (was 83.9 2 months ago, in the 90s in July & Aug)
# QCs: 30

 

[LeafMuranoDriver]

Bufordleaf - A delay might be the case for both of us as it has been very cool here the last 1-2 weeks too and still declining.

 

[tkdbrusco]

Cold temps and lack of use will drive the numbers down (at least max Gids). last year, when my car had only 5K miles on it, it was dropping to 276 or so when the temp really dropped in December. Once we warmed up in April, I was back up to 289 or so.

 

[pncguy]

Okay, so perhaps my car needs to learn about itself, but what I see for my numbers in LeafSpy is a bit disappointing.

Mfg: 7/2015
Purchase: 10/23/2015 Odo @ delivery: 12 miles

Three days ago after I set up LeafSpy

AHr: 58.19
SOH: 93%
V: 380.84
6 QC, 20 L1/L2

Drove it to LBW this morning and charged using L2. Car's SOC says 100%. L2 EVSE stopped charging (because the car thinks it is fully charged) GOM says 95 miles.

Odo: 495 mi
6 QC, 22 L1/L2
GIDs at full: 273
kWH: 21.2
SOC: 97.2% <- why does this disagree with the car's SOC?
SOH: 93%
Hz 89.09
AHr: 58.04
395.72V
Battery temps 60.6, 62.9, 57.6

I recall seeing an adjustable parameter (default around 67, some change it to 66.something?) but I can't find it in my settings.

Shall I just sit tight, run fully to LBW and charge to 100% a few times?

I'm still showing 12 bars....

 

[Bufordleaf]

@ LeafMuranoDriver - we shall see. I'm hopeful the stats might pick up a bit over the winter, as others have indicated, but won't hold my breath. I may try QCing it soon as I haven't done that in a while and, oddly enough, my stats were better when QCing on a semi-regular basis.

 

[tkdbrusco]

Okay, so perhaps my car needs to learn about itself, but what I see for my numbers in LeafSpy is a bit disappointing.

Mfg: 7/2015
Purchase: 10/23/2015 Odo @ delivery: 12 miles

Three days ago after I set up LeafSpy

AHr: 58.19
SOH: 93%
V: 380.84
6 QC, 20 L1/L2

Drove it to LBW this morning and charged using L2. Car's SOC says 100%. L2 EVSE stopped charging (because the car thinks it is fully charged) GOM says 95 miles.

Odo: 495 mi
6 QC, 22 L1/L2
GIDs at full: 273
kWH: 21.2
SOC: 97.2% <- why does this disagree with the car's SOC?
SOH: 93%
Hz 89.09
AHr: 58.04
395.72V
Battery temps 60.6, 62.9, 57.6

I recall seeing an adjustable parameter (default around 67, some change it to 66.something?) but I can't find it in my settings.

Shall I just sit tight, run fully to LBW and charge to 100% a few times?

I'm still showing 12 bars....

Your car is showing 97.2% SOC instead of 100% because the software in the car intentionally restrict you from charging the battery to 100%. There's about 3% held back at the top end and about 5% held back at the bottom. This is why at 292 GIDS (max possible for 2015), you will only get 22.6kwh of charge max, even though the pack is actually 24 kWh. Since its bad for Li-Ion batteries to every be fully charged or fully depleted, this is to keep you from ruining the pack over time. Every EV does this. Even though these stats are pretty low for a new car, I will point out that my car was tracking this low in January of last year (after 5K miles) and it came back up to 289 over the summer. Now here I am in November and its back down to about 275 at full charge and similar temps. As far as your bars go. You won't lose one until 15% loss, which is about 250 Gids or so. The 2011-2012 cars would lose it at about 55 AHR, but I think it will take about 53 AHR for the 2015 since they have several GIDS more when new.

 

[LeafMuranoDriver]

I charted my data. Almost 4k miles over the past 6 months. I QC'd today from 35 to 70% and had 56.6 Ahr on the 1st screen of LeafSpy. Planning to QC 3-4 times tomorrow on a long trip and will charge to 100% Monday/Tuesday.

 

[Evoforce]

Lizard battery in 2011 car is tracking the same losses as 2011 with original pack. Lizard and original have each lost 7% SOH respectively during the same time period and conditions. Tracking is still under a year. I was hoping this would not be the results.

 

[LeafMuranoDriver]

Lizard battery in 2011 car is tracking the same losses as 2011 with original pack. Lizard and original have each lost 7% SOH respectively during the same time period and conditions. Tracking is still under a year. I was hoping this would not be the results.

Are your GIDs and kWh down 7% too?

I'm still confused why my SOH is 99% but everything else is down so much more (GIDs & kWh are -7.5%, Hx -10%, Ahr -9.2%)

My lowest Ahr reading of 56.6 on Friday is down 10.3%! I QC'd 5 times (4 times for a 200+ mile trip) over the weekend and some stats are up and others down.

Date: 11/4/2015
Mfg: 01/2015 Pur: 05/2015
Mileage: 3,925
11 QC & 85 L1/L2s

GIDs: 269 (92.1%)
kWh: 20.8
SOC: 97.3%
SOH: 99%
Hx: 87.61%
AHr: 57.32


Date: 11/9/2015
Mfg: 01/2015 Pur: 05/2015
Mileage: 3,925
16 QC & 86 L1/L2s

GIDs: 270 (92.5%)
kWh: 20.9
SOC: 97.5%
SOH: 99%
Hx: 87.56%
AHr: 57.30

Hx and AHr are still down slightly from the last L2 charge but are up from the last QC on 11/7/15.

I'm really starting to notice I can't get as many miles per charge as I have in the past.

 

[Evoforce]

Lizard battery in 2011 car is tracking the same losses as 2011 with original pack. Lizard and original have each lost 7% SOH respectively during the same time period and conditions. Tracking is still under a year. I was hoping this would not be the results.

Are your GIDs and kWh down 7% too?

I'm still confused why my SOH is 99% but everything else is down so much more (GIDs & kWh are -7.5%, Hx -10%, Ahr -9.2%)

My lowest Ahr reading of 56.6 on Friday is down 10.3%! I QC'd 5 times (4 times for a 200+ mile trip) over the weekend and some stats are up and others down.

Date: 11/4/2015
Mfg: 01/2015 Pur: 05/2015
Mileage: 3,925
11 QC & 85 L1/L2s

GIDs: 269 (92.1%)
kWh: 20.8
SOC: 97.3%
SOH: 99%
Hx: 87.61%
AHr: 57.32


Date: 11/9/2015
Mfg: 01/2015 Pur: 05/2015
Mileage: 3,925
16 QC & 86 L1/L2s

GIDs: 270 (92.5%)
kWh: 20.9
SOC: 97.5%
SOH: 99%
Hx: 87.56%
AHr: 57.30

Hx and AHr are still down slightly from the last L2 charge but are up from the last QC on 11/7/15.

I'm really starting to notice I can't get as many miles per charge as I have in the past.

SOC 91%
SOH 93%
AHr 59.5
Hx 88.83%
GIDs 254
394V
odo 28,810 mi (6,600 on lizard)

I've only been tracking results for four months but on page (23) of this thread is my first notation of my readings. 7 months from new the GIDs were 266.

 

[Tyger]

So I did below 20% charge to 100% last night, and it got more of a charge, but the SOH and AHr are down...

Date:             10/25/2015  10/30/2015
Mileage:          834         970
GIDs:             267         271
kWh:              20.7        21.0
SOC:              95.2%       97.3%
SOH:              93%         92%
HX:               89.31%      88.33%
Ahr:              58.14       57.67
Avg Battery Temp: 77.7        76.3

After multiple full cycles (Including a day w/ 2 QCs and 180 miles travelled) things were still hovering around the same level, with the SOH between 92 and 94, and the AHr from 57.48 and 58.57.

Then yesterday I was out and about and was able to let the leaf sit on L2 charging partway through cell equalization, then moved it to a different L2 charger and let it do more cell equalization (It did not complete charging in either case). After the second charge, it showed 94% SOH (Same as the day before) but 58.89 AHr and 277 gids, the highest reading I've seen on either.

After all that I plugged it into the usual L1 charge and saw these numbers in the morning:

Date: 11/11/2015
Mileage: 1527
GIDs: 284
kWh: 22.0
SOC: 97.2%
SOH: 97%
HX: 93.42%
AHr: 60.53
Avg Battery Temp: 70.6

 

[EVFuture]

I've lost 5% battery capacity in the last 15 days and less than 500 miles according to LEAF Spy. Temperatures dropped quite a bit, but it's SoCal so it's not cold. I did have the car in the shop for 4 days at 60% charge last week, could that have resulted in lower numbers from my reading today? I've noticed the range seemed a bit lower the past few days.

2015 SV w/LED+QC
08/2014 Build Date (purchased 12/2014)

Date: 10/30/2015
Mileage: 12,975
GIDs: 292
kWh: 22.6
SOC: 97.4%
SOH: 100%
HX: 97.77%
AHr: 61.94
Ah: 61.91
Hx: 97.77%
Avg Battery Temp: 96.4
34 QCs
397 L1/L2s

Date: 11/14/2015
Mileage: 13,412
GIDs: 278
kWh: 21.5
SOC: 97.2%
SOH: 95%
Hx: 91.03%
AHr: 59.09
AH: 57.44
Avg Battery Temp: 70.6
34 QCs
413 L1/L2s

 

[DaveEV]

There's a lot of angst on what LeafSpy and the in-car LBC reports when there doesn't necessarily need to be. The 2013+ LEAFs are well known to show highly variable Ah values. In actuality, the only direction pack capacity can go is down, yet it often will jump up significantly under different usage conditions.

If you really want a better idea of how much capacity is left in the pack independent of what the LBC reports, discharge the pack to turtle (note overall pack voltage and individual cell-pair voltages) and charge to 100% (again note overall pack voltage and individual cell-pair voltages) while measuring energy drawn from the wall using an accurate energy meter.

Compare this to someone else's car charged under the same conditions and you'll have a much better idea of what you actual usable battery capacity is.

 

[mayo]

Starting to see a sharp decline in the last 2 months. Was a mild summer here. Kept under carport. Bummer.

Mfg 9/14
13,685 miles
262 Gids
SOH 89%
Ahr 55.59
Hx 84.01