2015: Battery Data Report @ 100% Charge

I'm happy to contribute data from my 2015 S with QC. Leased 09/30/14, Picked up 10/01/14. 9 miles and one QC on it when got it from dealer.

Mixed charging L1/L2:
-At office: L2 32A at office on 208V using Clipper Creek HCS-40
-At home: L1 using Nissan level 1 and intermatic timer to charge only when the EV rate kicks in.
-54km one way commute (reverse commuting out of Atlanta).
-I intend to baby the battery as much as possible.
-Charging at work to approximately 85% SOC (per leaf display) each day in mid morning after battery cools
-L1 trickle charging at home each night to approximately 65% SOC before the morning commute.
-I'm driving more than 95% in ECO mode.

Initial Battery AHr was 62.8 (forgot to screencap the rest) when I first discovered leaf spy about ten days ago.

Since then the battery AHr has increased to 64.38AHr.
SOH = 100%
Hx = 99.15%
Temp = 81F

I'm in the process of doing the first true 100% charge with balancing before today's commute home (on Level 2 since 11:30). I'll update the battery on either side of that commute if something changes.

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Battery Data after First 100% charge:

Miles: 646
GIDs: 292
SOC: 97.4%
AHr: 64.38
SOH: 100%
Hx: 99.50%
V_avg: 4.122V (18mV min to max)
T_max: 76.3 F

So it appears I am also seeing the new maximum GID value

How many gids?

DougWantsALeaf said:

How many gids?

Click to expand...

292, added to the post above

I have some new data from a 100% charge. Dropped since last assessment at 1500 miles. Not too happy about this. The car has been sitting in the garage for a week at about 50% charge since I was on vacation. I've also been trickle charging since I found out my wiring on my L2 charger isn't up to code. I only saw 292 Gids until about 1500 miles, max reading after that was 289, now a bit lower. Anyways....

2015 - S with 2154 miles.

286 Gids
22.17kwh
97.13% SOC
91.88 SOH
93.98% HX 60.88 Ahr
70.3 Avg temp

Date: 10/31/2014
Mileage:131
GIDs:292
kWh:22.63
SOC:97.02%
SOH:97.17%
HX:99.71%
Ahr:64.38
Avg Battery Temp:74.4

Date: 10/26/2014
Mileage:2539

GIDs:278
kWh:21.5
SOC:97.2%
SOH:95%
HX:91.30%
Ahr:59.25

Here is my data at 100% charge with 3,258 miles now on my 2015 S. This was taken after about 4 days of using the car for a 60 mile commute and charging to 100% each day. Looks like the days of 292 Gids are gone for good now. Haven't seen that number since mile 1,200, and we've settled in for 289. I'll settle for 289 if it stays there for another 10,000 miles or so. Seems like it came up a bit since my last reading, which was taken after the car sat in the garage at <50% charge for a week, amazing how use behavior can effect the battery.

289 Gids
22.40 kwh
97.2% SOC
92.64% SOH
94.81% HX 61.38 Ahr
63.6 F Avg Temp

Taken with Leaf Stat for iPhone.

I generally find I get a slightly better reading when I charge from a low % SOC starting point (<30%). Usually get an extra GID or two vs. when charging from 60-70%.

billg said:

Date: 10/26/2014
Mileage:2539

GIDs:278
kWh:21.5
SOC:97.2%
SOH:95%
HX:91.30%
Ahr:59.25

Click to expand...

Already dropped to 278 from 292 in just 2500 miles ?

camasleaf said:

288 GIDs
97.3% SOC
61.35 Ahr

Min 4.122
Avg 4.127
Max 4.138

Click to expand...

Is it my imagination or do the lizard packs seem to be charging to a slightly higher voltage?
I think I've seen 4.11-4.12v (on my 2011/12) while charging near the top but after charge has completed and the voltages settled a bit seeing 4.138v seems kinda high?
Perhaps that explains the higher GID readings at lower Ah capacities... ?

I just charged to "full" a few hours ago and right now my highest cell voltage is 4.102v.

Could someone with a 2015 and instrumentation confirm what the highest cell voltage is at rest an hour or two after a full charge is completed?

GregH said:

camasleaf said:

288 GIDs 97.3% SOC 61.35 Ahr

Min 4.122 Avg 4.127 Max 4.138

Click to expand...

Is it my imagination or do the lizard packs seem to be charging to a slightly higher voltage?
I think I've seen 4.11-4.12v (on my 2011/12) while charging near the top but after charge has completed and the voltages settled a bit seeing 4.138v seems kinda high?

Click to expand...

Definitely higher than anything I've ever seen. The highest average I can recall seeing is around 4.10V, with the highest cell being 4.11V or so while charging. 4.127V avg would put the pack voltage at 396V which is definitely higher than the 394-395V you'd see with older LEAFs while charging. Looking back at all my recent 100% data, I don't see anything but 393.5-394.0V total pack voltages from my LeafDD - none of those were taken while charging, all anywhere from right after charging to a couple hours later.

The higher voltage is probably also contributing to the high SOC of 97.3% - I haven't seen anything higher than high 95% as far as I can tell, though it's highly variable - can be anywhere from 90.7% to 95.9%

mkjayakumar said:

billg said:

Date: 10/26/2014
Mileage:2539

GIDs:278
kWh:21.5
SOC:97.2%
SOH:95%
HX:91.30%
Ahr:59.25

Click to expand...

Already dropped to 278 from 292 in just 2500 miles ?

Click to expand...

I apologize for not returning to this thread to respond. I'm not sure what my beginning stats were. Oct 26 is when I first used Leaf Spy to check my stats, and that was nearly 3 months after leasing the car. It is now 6 weeks later and my stats after a 100% charge are:

Mileage:3542 (+1003)
GIDs:271 (down 7)
kWh:21.0 (down 0.5)
SOC:97.3% (up 0.1)
SOH:92% (down 3)
HX:88.21% (down 3.09)
Ahr:57.61 (down 1.64)

This doesn't look good for the long-term health of this battery.

What was your starting charge % SOC. I find the lower the starting SOC, the more GIDS I have at the end.

Does the 2015 Leaf have improved battery capacity (range)?

Click to expand...

http://www.mynissanleaf.com/viewtopic.php?f=27&t=18485

billg said:

This doesn't look good for the long-term health of this battery.

Click to expand...

I don't know if I would panic quite yet. If what Nissan, and others, have asserted is true, all batteries will lose 5% capacity in the first year, and then level off. The problem with Nissan's Gen1 battery was that it didn't level off, at least not in hotter areas, but continued a steady decline. Only time will tell, be patient. I think the data between 1 and 2 years will be the most telling.

On my 2014 SV, I did not drop a single Gid from 282 when new for nearly 5k miles or more, but that was in the colder months of Feb & March. So seeing 271 Gids down from 294 on just 3K miles - on a 2015 model with a supposedly 'Lizard' battery is odd.

Here's my most recent stats. Taken from Leaf stat. 4,000 miles on the car.

280 GIDs
21.70 Kwh
97.29% SOC
89.87% SOH
91.78% HX
59.54 Ahr
69 degrees average temp

These are lower than I saw in the first couple months. Only got 292 gids until 1300 miles, reading at 3,000 miles was 285.

I think the 2015 lizards are reading much different that other packs in the past. We have much higher gids for lower Ahr readings. I'm hoping this is just a 5% loss settling out situation.

tkdbrusco said:

Here's my most recent stats. Taken from Leaf stat. 4,000 miles on the car.

280 GIDs
21.70 Kwh
97.29% SOC
89.87% SOH
91.78% HX
59.54 Ahr
69 degrees average temp

These are lower than I saw in the first couple months. Only got 292 gids until 1300 miles, reading at 3,000 miles was 285.

I think the 2015 lizards are reading much different that other packs in the past. We have much higher gids for lower Ahr readings. I'm hoping this is just a 5% loss settling out situation.

Click to expand...

How are you charging? Daily? Running til LBW? Running to VLBW? Quick charging? Are you leaving it sit?

I probably have the highest usage in the shortest time on a 2015

In about a month I have 2100 on my '15.

I think I'm using pretty standard charging procedures. For the first month or so I charged up to 100% most days, but then realized that I didn't need that much for my round trip commute, so now I charge to about 85%, which gets me home with about 30% left. I rarely run it lower than 30% charge. When my wife drives it, we usually leave the house with about 60%, she has chargers at work, so she plugs in at work when she gets there (with 30% or so) and usually charges it to 100% before heading home. So I'd say its charged to 100% about 3 days a week on average. We have an S, so its really hard to calculate a less than 100% charge, especially for my wife when she plugs in at work. Had I known that it would be such a hassle with program charges on the S, I'd have gotten an SV. L2 charger at home, L2 charger at my wife's work. Never QC'd, at least not by us. It went to the dealer twice for some warranty stuff and they might have QC'd it, but I'm not sure. My readings were really high until about 2,000 miles and then started dropping. I also noticed that they vary quite a bit depending on usage. I had it sitting in the garage for about a week with no use and I got really low readings at 100% (278 I think) and then after using it for a few days, they shot up to 289. I'm kind of over it to be honest. I'd almost rather have not ever bought the battery reader because now I analyze the crap out of it.