2015: Battery Data Report @ 100% Charge

[keydiver]

Update on my Battery Numbers - might find interesting battery behaviors
The more we used the car, the better the numbers started getting.
So, appears the batter is not as bad as I thought

Thank you very much for the update. I, probably like many others on MNL, was concerned about the low SOH you received your Leaf in. It just goes to show how different this new 2015 chemistry is, and we have much to learn yet about its characteristics. Most people have been reporting really good SOH numbers from their 2015, even in hot climates with lots of miles, so I'm optimistic (for once).

 

[BooKittyLeaf]

Most people have been reporting really good SOH numbers from their 2015, even in hot climates with lots of miles, so I'm optimistic (for once).

It will be interesting to see how the numbers hold up after a full summer in AZ.

Now that I can see a direct correlation between consistent usage & charge cycles and battery health - I am more optimistic that the Gids will stay strong throughout the summer - depending on how much the heat tolerance has improved on the 2015 battery, it should hold up well for many years.

 

[o00scorpion00o]

This Leaf has a lot of fast charges and is one year old, so Maybe Nissan changed the chemistry for non U.S leafs too ?

I know we don't have a hot climate or anything resembling hot but I wasn't expecting this Leaf to have 100% Capacity or the exact same AH as my 6.5 week old Leaf !

This 2013 Demo Leaf I had last year for a few days had lost a bit of capacity after 3,500 miles, it was around 97% and mainly fast charged. It certainly had a tiny fraction of the fast charges and L2 charges on the leaf above. I'll see if I can find the screen shot of that leaf.

 

[camasleaf]

2015 Leaf SV Manufactured date June 2014 - Leased Sept 2nd 2014 : Mileage: 4080 Charged: 25 QC 148 L2

100% Charge:
GIDs: 292
kWh: 22.6
SOC: 97.3%
SOH: 100%
Hx: 99.11%
Ahr: 64.38
Battery Temp: 62.5 deg F
Voltage min 4.117
Voltage average 4.124
Voltage max 4.130

Update at 6500 miles
100% Charge:
GIDs: 293
kWh: 22.7
SOC: 97.5%
SOH: 100%
Hx: 98.41%
Ahr: 64.06
Battery Temp: 62.7 deg F
Voltage min 4.124
Voltage average 4.128
Voltage max 4.134

 

[DaveEV]

It just goes to show how different this new 2015 chemistry is, and we have much to learn yet about its characteristics.

I think it has more to do with the LBC/BMS rather than the batteries themselves...

 

[RegGuheert]

... - however, the Dealer did the CVLI at 100% charge - which I thought was odd since it is supposed to be dome at LOW battery charge to spot cell indifference's??

I find it very frustrating that dealers consistently do this test incorrectly. As you say, since the LEAF battery pack is top balanced, calculating CVLI at 100% is nonsense. It tells you nothing about whether or not you have a low-capacity cell.

BTW, how did you find out that they ran the test at 100%? Was there a report that they provided that showed the SOC or the cell voltage?

 

[BooKittyLeaf]

BTW, how did you find out that they ran the test at 100%? Was there a report that they provided that showed the SOC or the cell voltage?

I did get a copy of the report.
Along the top of the report is has some values:

Recording Time: 10 sec
Sampling Rate: 10 msec
Trigger Rate: Pre 80% / Post 20%
Cell Voltage Loss Judgement Value: 3694.677083 mv
"No Module Requires Replacement"

What leads me to believe the test was dome at 100% Charge is:
8 pages lists all 96 cell pairs, and they are all at 4.118 - 4.131 (13mv) - thats the same as I show in LeafSpy at 100% charge
Total Battery Voltage: 395.80v - thats the same voltage at 100% shown by LeafSpy

However, I was keeping an eye on the battery via car wings - checking it a few time throughout each day they had the car
The day I dropped it off (to be there for a week or so - dealer is about 40 miles away) I got a text that evening that the car stopped charging - and it was at 100%. So it will sit there for a week at 100% - geeez!
Anyway, two days later I noticed the charge went down to 30% or so. Then was charged again to 100%.
After checking the milage, car was not driven. Perhaps that was the test??

The voltages in the report look very much like a 100% charge.

I understand the voltage requirement for the test is 3.712v

When I did a Range Test last month, I took battery down to 2.15% (LeafSpy) and had 5 GIDs, .39kwh, cells were 2.995/3.062/3.142 (147mv) 294.02 Volts

No cells were shunting, they were all blue. The cells appeared to be in TWO banks - divided about 50/50 the averages of one bank a little lower than the other.
LeafSpy reported "All Cells OK"

My Driving range is good, and predictable - so I believe the pack is good,in fact, getting better the more I use it

I was not able to talk to anyone about the test.
There is ONE person in Service that seems to have some knowledge of Leaf Battery and is friendly and entertains my questions.
Everyone else gets upset and irritated when I ask any questions at all, other then "where is the bathroom".
I called 2 times & specifically requested the test results be attached to my repair order AND my keys so I can get them when I pick up the car to discuss as I expected that I would not get the results when I showed up because they "couldn't find them" - thats why I called TWICE to make sure, plus, I live 38 miles from Dealer.
As I predicted, the results were not with my paperwork. I had to call the next day, and they mailed the results out to me. So, I was not able to review them and speak to a Leaf technician about the results... likely that would not have revealed anything anyways, but still... Frustrating!

 

[RegGuheert]

Cell Voltage Loss Judgement Value: 3694.677083 mv

That looks like what I would expect for the Cell Voltage Loss Judgement Value" in the case the test is run correctly.

However, I was keeping an eye on the battery via car wings - checking it a few time throughout each day they had the car
The day I dropped it off (to be there for a week or so - dealer is about 40 miles away) I got a text that evening that the car stopped charging - and it was at 100%. So it will sit there for a week at 100% - geeez!

My dealer always does the same thing: They charge it to full as soon as they get the car. Drives me nuts. I need to make sure I only ever take it to them on cold days.

Anyway, two days later I noticed the charge went down to 30% or so. Then was charged again to 100%.
After checking the milage, car was not driven. Perhaps that was the test??

Yes, I think that was the test.

Frustrating!

It sounds like it! I'll never take it in to have this done unless our LEAF fails that test consistently with a fully-balanced pack. It sounds like you are in good shape now.

I only recall one or two owners ever having their LEAF fail this test.

 

[mayo]

Date: 3/27/2015
Mileage: 7026
1 QC & 222 L1/L2s

GIDs: 275
SOC: 97.3%
SOH: 94%
Hx: 90.07%
Ahr: 58.51

 

[tkdbrusco]

Numbers climbing with every new charge. Will they get back up to 292? I doubt it.

2015 S w/QC package - 9,035mi - MFG 4/14 - Bought 8/14 - Never QC'd - Past 2 months have mostly charged to 100% from about 35% Seem like the battery likes to be cycled through like this.

287 GIDS
22.24 KWH
97.15% SOC
92.18% SOH
94.31% HX
61.08 Ahr
71.6 F

Starting to get much less worried about degradation on 2015 models, perhaps they got this lizard thing right!

 

[MartinChico]

12/28/14 / 93mi / 9 L1/L2s & 1 QC:
96.4% SOC / 289 GIDs / 22.4 kWh / 63.28 AHr / 100% SOH / 97.45% Hx

01/31/15 / 652mi / 24 L1/L2s & 1 QC / ~3.9 mi/kWh (for the past month):
97.2% SOC / 281 GIDs / 21.8 kWh / 59.76 AHr / 96% SOH / 92.14% Hx

02/28/15 / 1,477mi / 54 L1/L2s & 1 QC / 4.4 mi/kWh (for the past month):
97.3% SOC / 281 GIDs / 21.0 kWh / 59.72 AHr / 96% SOH / 92.08% Hx

03/29/15 / 2,161mi / 74 L1/L2s & 1 QC / 4.6 mi/kWh (for the past month):
97.4% SOC / 284 GIDs / 22.0 kWh / 60.27 AHr / 97% SOH / 92.98% Hx

I was really disappointed when my GIDs dropped to 281 after the first month, but now all the battery numbers are creeping UP a bit!

 

[TheGiz05]

April Reading for mine...

Date: 3/30/15
Mileage: 4537
8 QC & 205 L1/L2s

GIDs: 286
kWh: 24.83 (calculated)
SOC: 95.60%
SOH: 100%
Hx: 96.84%
Ahr: 62.78
Avg Battery Temp: 77.4 F

 

[boba]

What does 61.08 Ahr mean relative to the LEAF? I assume it stands for amp hours.

Numbers climbing with every new charge. Will they get back up to 292? I doubt it.

2015 S w/QC package - 9,035mi - MFG 4/14 - Bought 8/14 - Never QC'd - Past 2 months have mostly charged to 100% from about 35% Seem like the battery likes to be cycled through like this.

287 GIDS
22.24 KWH
97.15% SOC
92.18% SOH
94.31% HX
61.08 Ahr
71.6 F

Starting to get much less worried about degradation on 2015 models, perhaps they got this lizard thing right!

 

[lorenfb]

What does 61.08 Ahr mean relative to the LEAF? I assume it stands for amp hours.

That's correct. As for any battery, e.g. phone, laptop or Leaf, Ahr is a measure of the capacity of the battery.
As with any battery, its fully charged Ahr capacity will decrease over time as a function of the number
of charges/discharges, age, and the average temperature it's exposed to.

Some prefer to use/monitor the battery energy capacity kWhr represented by GIDs. But since the Leaf's
battery voltage changes little (<10%) as the battery discharges or ages, some prefer to focus on the Ahr.
Using Ahr over time and mileage, one can more accurately predict one's remaining range better
than what the GOM (instrument cluster displayed range) does. A key problem with GOM is that it uses
your coasting mileage (low power demand per mile) in predicting your remaining range, which results
in an inaccuracy. It's misleading to assume that previous coasting or low power demands will exist
in the future as one's trip continues. So monitoring the usable remaining Ahrs (based on range history)
is a better predictor of remaining range for a given trip.

 

[jwalbaum]

Date: 4/2/2015
Mileage: 9617
0 QC & 522 L1/L2s

GIDs 292
kWh: 22.6
SOC: 97.1
SOH: 100
Hx: 101.89
Ahr: 64.38
Avg Battery Temp: 70.7F

Manufacture date: 8/14 Lease date: 9/13/2014

 

[minispeed]

2015 Leaf SV got it on July 25 2014

The only thing I recorded was a mental note of 292 GIDS when I got the leaf spy ap.

Nov 3rd these screen shots were at 100% from the L2 at home, I drove to work and charged to 100% on L1 and took a single screen shot and it had 292 GIDS and 22.6 kWh SOC 97.4 but I didn't take screen shots with the other info. I think I might have had CC running in the AM though.
Nov 3 '14: KM - 11 962, Soh - 100%, Charges - 11 QC 256 L1/L2, Gidds - 289, kWh - 22.4, Soc - 96.4%, Hx - 101.94%, Ahr - 64.38
Jan 17 '15: KM - 19 338, Soh - 100%, Charges - 38 QC 453 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.2%, Hx - 108.32%, Ahr - 64.38
Mar 31 '15: KM - 26 786, Soh - 100%, Charges - 65 QC 647 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.1%, Hx - 111.18%, Ahr - 64.38

 

[MartinChico]

12/28/14 / 93mi / 9 L1/L2s & 1 QC:
96.4% SOC / 289 GIDs / 22.4 kWh / 63.28 AHr / 100% SOH / 97.45% Hx

01/31/15 / 652mi / 24 L1/L2s & 1 QC / ~3.9 mi/kWh (for the past month):
97.2% SOC / 281 GIDs / 21.8 kWh / 59.76 AHr / 96% SOH / 92.14% Hx

02/28/15 / 1,477mi / 54 L1/L2s & 1 QC / 4.4 mi/kWh (for the past month):
97.3% SOC / 281 GIDs / 21.0 kWh / 59.72 AHr / 96% SOH / 92.08% Hx

03/29/15 / 2,161mi / 74 L1/L2s & 1 QC / 4.6 mi/kWh (for the past month):
97.4% SOC / 284 GIDs / 22.0 kWh / 60.27 AHr / 97% SOH / 92.98% Hx

04/27/15 / 2,927mi / 95 L1/L2s & 1 QC / 4.5 mi/kWh (for the past month):
97.3% SOC / 287 GIDs / 22.2 kWh / 61.02 AHr / 98% SOH / 94.22% Hx

I was really disappointed when my GIDs dropped to 281 after the first month, but now all the battery numbers are clearly creeping up. As others here pointed out, the battery management system requires some time to "learn" the battery, and thus the early data is probably not very accurate. In any case, I'm very happy with these numbers and my LEAF in general.

 

[mayo]

Date: 5/2/2015
Mileage: 8065
1 QC & 233 L1/L2s

GIDs 275
kWh: 21.3
SOC: 97.2
SOH: 94%
Hx: 89.84
Ahr: 58.40

 

[lorenfb]

Date: 5/2/2015
Mileage: 8065
1 QC & 233 L1/L2s

GIDs 275
kWh: 21.3
SOC: 97.2
SOH: 94%
Hx: 89.84
Ahr: 58.40

Another 2015 that correlates with my 2013 (12/2013), now at 20K with 56 Ahr.

 

[rexki]

Date: 5/6/2015
Mileage: 3,446
0.5 QC 39 L1 88 L2s

GIDs 291
kWh: 22.55
SOC: 96.88
SOH: 97.17%
Hx: 99.64
Ahr: 64.38