Post Your Battery Degradation Results

[DNAinaGoodWay]

At 8-1/2 months, 8.5 k miles, and now that it's warming up, finally starting to show some degradation. First two screenshots are from last Friday, second set from this morning. Notice that Ah goes up, but GIDs go down. Both after 100% charge.

 

[DNAinaGoodWay]

Oops, only 3 attachments allowed.

 

[mwalsh]

So far our spread appears to be 43.19AHr on the high side and 41.77AHr on the low side. If anyone knows of any more, higher or lower, please report back here or in the Early Capacity Losses thread.

Spread now 43.56 AHr (jpvleaf) on the high side and 41.77 AHr (brettcgb) on the low side.

 

[jwalbaum]

Ahr - Hx - GIDs - L1/L2 - Temp F - Miles - Date
63.98 - 99.87 - 291 - 152 - 36.25 - 3175 - 11/6/2014
64.38 - 100.73 - 292 - 158 - 35.75 - 3287 - 11/7/2014
64.1 - 100.93 - 293 - 196 - 36.5 - 4034 - 11/20/2014
64.38 - 104.34 - 293 - 236 - 40 - 4661 - 12/5/2014
64.24 - 104.24 - 292 - 335 - 36.5 - 6039 - 1/15/2015
64.38 - 104.57 - 292 - 369 - 38.5 - 6694 - 1/31/2015
64.38 - 105.3 - 292 - 448 - 29.1 - 7863 - 3/1/2015
64.38 - 104.25 - 292 - 493 - 58.1 - 8968 - 3/18/2015
64.38 - 101.89 - 292 - 522 - 70.7 - 9617 - 4/2/2015
64.38 - 104.52 - 292 - 538 - 42.75 - 10066 - 4/10/2015
64.38 - 100.36 - 292 - 598 - 72 - 11578.6 - 5/8/2015


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

 

[tkdbrusco]

Ahr - Hx - GIDs - L1/L2 - Temp F - Miles - Date
63.98 - 99.87 - 291 - 152 - 36.25 - 3175 - 11/6/2014
64.38 - 100.73 - 292 - 158 - 35.75 - 3287 - 11/7/2014
64.1 - 100.93 - 293 - 196 - 36.5 - 4034 - 11/20/2014
64.38 - 104.34 - 293 - 236 - 40 - 4661 - 12/5/2014
64.24 - 104.24 - 292 - 335 - 36.5 - 6039 - 1/15/2015
64.38 - 104.57 - 292 - 369 - 38.5 - 6694 - 1/31/2015
64.38 - 105.3 - 292 - 448 - 29.1 - 7863 - 3/1/2015
64.38 - 104.25 - 292 - 493 - 58.1 - 8968 - 3/18/2015
64.38 - 101.89 - 292 - 522 - 70.7 - 9617 - 4/2/2015
64.38 - 104.52 - 292 - 538 - 42.75 - 10066 - 4/10/2015
64.38 - 100.36 - 292 - 598 - 72 - 11578.6 - 5/8/2015


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

I think this thread is for "degradation" results.

 

[jwalbaum]

Ahr - Hx - GIDs - L1/L2 - Temp F - Miles - Date
63.98 - 99.87 - 291 - 152 - 36.25 - 3175 - 11/6/2014
64.38 - 100.73 - 292 - 158 - 35.75 - 3287 - 11/7/2014
64.1 - 100.93 - 293 - 196 - 36.5 - 4034 - 11/20/2014
64.38 - 104.34 - 293 - 236 - 40 - 4661 - 12/5/2014
64.24 - 104.24 - 292 - 335 - 36.5 - 6039 - 1/15/2015
64.38 - 104.57 - 292 - 369 - 38.5 - 6694 - 1/31/2015
64.38 - 105.3 - 292 - 448 - 29.1 - 7863 - 3/1/2015
64.38 - 104.25 - 292 - 493 - 58.1 - 8968 - 3/18/2015
64.38 - 101.89 - 292 - 522 - 70.7 - 9617 - 4/2/2015
64.38 - 104.52 - 292 - 538 - 42.75 - 10066 - 4/10/2015
64.38 - 100.36 - 292 - 598 - 72 - 11578.6 - 5/8/2015


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

I think this thread is for "degradation" results.

I suppose I can wait until it actually starts to "degrade", if that happens before the lease ends.

 

[DNAinaGoodWay]

Here's a question, just last week, at 100%, Leaf Spy read 281 GIDs, 59.95 AHr. Today it's back to 292 GIDS, 64.01 AHr.

Assuming my pack can't gain capacity, why would it temporarily read lower?

 

[mwalsh]

Here's a question, just last week, at 100%, Leaf Spy read 281 GIDs, 59.95 AHr. Today it's back to 292 GIDS, 64.01 AHr.

Assuming my pack can't gain capacity, why would it temporarily read lower?

It bounces around some, you can see that from my daily readings over the last 3 months. Has the weather been a tad cooler this week?

 

[DNAinaGoodWay]

Here's a question, just last week, at 100%, Leaf Spy read 281 GIDs, 59.95 AHr. Today it's back to 292 GIDS, 64.01 AHr.

Assuming my pack can't gain capacity, why would it temporarily read lower?

It bounces around some, you can see that from my daily readings over the last 3 months. Has the weather been a tad cooler this week?

Yeah, about 20-30 degrees cooler today than last week. And my readings did begin dropping as the weather warmed up here. So, warmer temps can give a false low reading?

 

[tkdbrusco]

Here's a question, just last week, at 100%, Leaf Spy read 281 GIDs, 59.95 AHr. Today it's back to 292 GIDS, 64.01 AHr.

Assuming my pack can't gain capacity, why would it temporarily read lower?

Over the course of my 9 months of ownership now, I've seen it go as low as 278 and as high as 292. Since I now have 11,500mi on the car, I doubt I'll see 292 again. The highest I've seen since hitting 10K miles has been 288. The fluctuations I've see have mainly dealt with temperature. In the winter months (even in CA) I was seeing between 278-283 on average. There was also one time where it dropped to about 278 or so after sitting in the garage for a week unused (at about 50% charge). If you cycle through the battery frequently, and charge up to 100% for a few days in a row, you should see this number climb. During the summer months, with said cycling and repeated 100% charging, you'll likely be at your max GIDS.

 

[DaveInAvl]

'14 SL, mfd 1/14, leased 3/14, Asheville NC, 8847 mi.
251 GIDs @ 97.2% SOC
57.71 AHr
SOH 88
Hx 87.02
32 L3 / 295 L1+L2
Batt temp ~73F

 

[tkdbrusco]

'14 SL, mfd 1/14, leased 3/14, Asheville NC, 8847 mi.
251 GIDs @ 97.2% SOC
57.71 AHr
SOH 88
Hx 87.02
32 L3 / 295 L1+L2
Batt temp ~73F

Wow this is surprisingly different than my 2015 S. Mine was manufactured in 4/14, so the pack is only 3 months older by age and my car has 11,500mi now, but I'm showing 286 Gids at a full charge. Seems like the new lizard packs are holding up well.

 

[69800]

1/1/2012 Delivery (2 1/2 years old)
Mileage 27453
AH-60.09 SOH 91%
80% charges except once a week 50 mile RT normally
North Idaho

51.4 AH 48,918 miles, 91040 2011 LEAF (2yrs 1.5 months)
53.5 AH 19,500 miles. Stanton 2011 LEAF
54.07AH 30,455 miles mwalsh 2011 LEAF (29.75 months)
54.7 AH 28,310 miles HighDesert2011 LEAF (21 months) 79.31% capacity
55.23AH 32,745 miles ttweed 2011 LEAF (27 months) 83.36% capacity
56.7 AH 24,000 miles Boomer23 2011 LEAF
56.75AH 6,800 miles vrwl 2011 LEAF (12 months) 84.7% capacity
57.6 AH 21,000 miles opencar 2011 LEAF (2yrs) 86% capacity
57.8 AH 34,704 miles LEAFer 2011 LEAF (2.5yrs) 87.26% capacity
57.8 AH 5,918 miles rickbeckr 2011 LEAF (2.25yrs)
57.88AH 22,000miles tbleakne 2011 LEAF (2yrs, 3wks) 87.36 capacity
58 AH 19,500 miles. drees. 2011 LEAF (2yrs)
60 AH 27,500 miles. 69800 2012 LEAF (2.5 yrs)
61 AH 3,500 miles LEAFfan 2013 LEAF (3 months)
61.5 AH 6,000 miles ELROY 2012 LEAF (8 months) 92.88% capacity
61.8 AH 10,900 miles dp Colorado 2012 LEAF (1 1/2 yrs)
62.5 AH 8000 miles GregH 2012 LEAF (5 months)
63.99AH 1400 miles lion 2013 LEAF (1 month) 98.15% capacity
66.02AH 13000 miles WetEV 2012 LEAF (13 months) (Leaf Logger)
67.36AH 7400 miles MarvG 2013 LEAF (4 months) 101.67% capacity
67.4 AH 4925 miles IraqiInvr 2013 LEAF (4 months) 101.67%

 

[mwalsh]

The weather is getting hotter, and battery degradation is accelerating nicely with it - down to 44.77AHr today from 45.07AHr 9 days ago. However, all of a sudden I've found out that I no longer need to commute, so there will be very little mileage accumulated in the immediate future and far fewer full charge cycles unless I actually take the car out and drive to "nowhere" (and back) each day. On the plus side, I suppose, I no longer need to worry at all about running out of warranty miles before I run out of warranty months.

So I guess what I'm wondering out loud is how much weight should be assigned to miles driven and the resultant charge/discharge cycles as they relate to degradation. My gut feeling is that it's not going to be significant, but I can't afford to take any chances being as I only have 6.5 months of warranty available and under 4 months of hot weather ahead.

Of course, I could always see how the next week to 10 days go to get a rough idea - if the weather stays more or less the same and degradation continues to track at the same levels even without the car being driven, I guess I'd have my answer, but I wouldn't yell at any of you should you want to make an educated guess.

 

[mwalsh]

The weather is getting hotter, and battery degradation is accelerating nicely with it - down to 44.77AHr today from 45.07AHr 9 days ago. However, all of a sudden I've found out that I no longer need to commute, so there will be very little mileage accumulated in the immediate future and far fewer full charge cycles unless I actually take the car out and drive to "nowhere" (and back) each day. On the plus side, I suppose, I no longer need to worry at all about running out of warranty miles before I run out of warranty months.

So I guess what I'm wondering out loud is how much weight should be assigned to miles driven and the resultant charge/discharge cycles as they relate to degradation. My gut feeling is that it's not going to be significant, but I can't afford to take any chances being as I only have 6.5 months of warranty available and under 4 months of hot weather ahead.

Of course, I could always see how the next week to 10 days go to get a rough idea - if the weather stays more or less the same and degradation continues to track at the same levels even without the car being driven, I guess I'd have my answer, but I wouldn't yell at any of you should you want to make an educated guess.

Felt the need to recharge today after 6 days/33 miles of usage (city driving in D with no particular attention to energy conservation) and was pleasantly surprised to find that AHrs had slipped quite a bit more, to 44.64AHr from 44.77AHr last Friday.

Right now, after just finishing charging (and this is the first I've seen this summer), I've got 6 battery temperature bars and pack temps ranging from 80.8 degrees (sensor 4) to 83.8 degrees (sensor 1). Temperature bars until now have been pretty much 5 after every morning charge, and then hovering between 5 and 6 during the day (remember the temps at the office were typically much cooler than here at home). Could somebody remind me what the thresholds are for temperature bars? Edit: Never mind...found it:

http://www.mynissanleaf.com/viewtopic.php?f=8&t=13242&start=10" onclick="window.open(this.href);return false;

So it would appear that the only thing that matters is keeping that battery pack temperature up, which should be a pretty easy task from here on in.

 

[HighDesertDriver]

...So it would appear that the only thing that matters is keeping that battery pack temperature up, which should be a pretty easy task from here on in.

Once our higher summer temperatures arrived and stayed, TBs maintained mostly at 6 and our capacity melted away at .02-.03 Amphr per day. Looks like you'll qualify within the warranty period.

 

[DaveInAvl]

2014 SL - mfd 1/14, leased 3/14, Asheville NC. Overnight L1 with "charge complete" text about an hour before these readings:

 

[mwalsh]

Once our higher summer temperatures arrived and stayed, TBs maintained mostly at 6 and our capacity melted away at .02-.03 Amphr per day.

That corresponds very well with my own observations of ~0.50AHr capacity loss per month. Thanks for the info.

 

[RonDawg]

As of 6/6/2015:

Car was manufactured 8/2012, leased 1/2013, currently has a bit over 24k miles. Garage kept both at home and at work. Never QC'd (since it doesn't have that port). I'll probably lose that first bar by the end of summer.

 

[keydiver]

I finally lost my 3rd bar today. At 72% capacity, the car is getting more challenging to use, especially with the A/C on.