Post Your Battery Degradation Results

[HighDesertDriver]

Low 43 AHr range is what I have seen reported for the 4th bar going away.
TT

Although...I was quite shocked to hear that 91040 lost his at 41.6AHr.

Looking at my graph that would put me exactly at my 5 year date. ha, maybe i'll have to take a couple of adventure weekend vacations to the desert !
The 9th-bar line right now on my graph is at 42.75Ahr.

From other posts over the years, I've kept the low-to-mid 43 AHr span as the target for loosing the 9th bar. As daytime highs have begun to creep higher since late winter, our batttery capacity has begun to drop dramatically again, currently to 44.85 AHr and max 178 Gids. The remaining range is quite sufficient for local valley driving, but longer drives through the hills to Santa Clarita are now out except for exended charging stays. We are greatly anticipating a new warranty battery this summer, but are not trying to predict a precise date. Sooner will be much better than later, however.

 

[mwalsh]

Although...I was quite shocked to hear that 91040 lost his at 41.6AHr. I hope to God mine doesn't hang on that long! :shock:

I was wrong in quoting this as 91040's reading at the loss of 4 bars...misread his SIG. His AHr reading at the loss of bar 9 was actually 42.61. But that still leaves us with brettcgb with a loss of bar 9 at 41.77AHr, so not too far off and still distressingly low.

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.

 

[lorenfb]

Good data for those of us late adopters 'following closely' behind.

 

[opencar]

wow, our battery stats are almost identical. what was the Ahr reading upon drop of bar 10? i'm @ 47.70 now
thanks

It was 47.36.
During that last Santa Ana we had it dropped a lot, going from 47.63 to 47.36 in just 6 days and right past the 47.47 I had as my "10th bar target". But then it came back up a little (47.40) and held for a few days before dropping again and this time losing the bar on the day it again showed the 47.36Ahr

Do we have an expectation for when to lose the 9th bar?

Shaun

man, our batteries are still tracking the same; just lost my 3rd bar today at 47.47 Ahr, like clockwork.

 

[gbshaun]

man, our batteries are still tracking the same; just lost my 3rd bar today at 47.47 Ahr, like clockwork.

Indeed !
Shaun
Melba Rd, Encinitas

 

[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

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

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

I think the thread is "post your battery degradation results" not, "post your battery growth results"

All kidding aside though, these are spectacular numbers. My 2015 is still tracking 287 Gids at 100% with 10K miles on it, but nothing near what you have for ahr and soh.

 

[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

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

I think the thread is "post your battery degradation results" not, "post your battery growth results"

All kidding aside though, these are spectacular numbers. My 2015 is still tracking 287 Gids at 100% with 10K miles on it, but nothing near what you have for ahr and soh.

I completely expected to be showing degradation by now. Apparently, the secret to keeping the new battery healthy is to not care whatsoever about its health.

 

[gbshaun]

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

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

I think the thread is "post your battery degradation results" not, "post your battery growth results"

All kidding aside though, these are spectacular numbers. My 2015 is still tracking 287 Gids at 100% with 10K miles on it, but nothing near what you have for ahr and soh.

I completely expected to be showing degradation by now. Apparently, the secret to keeping the new battery healthy is to not care whatsoever about its health.

...and keep it in a refrigerator !

But those are a remarkable set of figures. Please keep us posted as summer approaches

 

[tkdbrusco]

Here's mine for comparison sake. At 10,200mi

285 Gids
22.09kwh
97.24 SOC
91.58 SOH
93.66 HX
60.68 AHR
78 Temp

This is on a 1 year old battery for a 2015 Mfg in 4/14 and taken delivery in 8/14. Not sure how it was treated on the lot for that period of time, but it was summer. This is about 2% degradation at 10K miles and 1 year old. Given that, I will be at 20% degradation at 100K miles. Perhaps even less since it will only take me about 6-7 years to get there. I'll take that.

 

[bradbissell]

Update on my degradation:

Date       Ahr      %CAP    %SOC        SOH       GIDS    V Max   mv Delta   Max Batt Temp F     Total Miles
6/24/13   66.850  101.905  97.100                         4.135    10.000     80.000
7/22/13   67.050  102.210  96.900       103.090    283    4.125     9.000     79.500
8/1/13    66.150  100.838  97.100       101.400    284    4.128     9.000     78.800               4960
8/12/13   65.810  100.320  96.800       100.760    283    4.128    12.000     68.900               5443 
8/28/13   65.220   99.421  97.100        99.760    283    4.134     9.000     75.200               6166
9/6/13    65.370   99.649  96.800        99.960    283    4.113    11.000     67.100               6415
9/18/13   65.090   99.223  97.000        99.590    283    4.125    14.000     58.100               6879
9/26/13   63.580   96.921  96.700        97.610    274    4.132    12.000     63.900               7223
9/27/13   64.090   97.698  97.000        98.270    278    4.121    10.000     70.000               7274
10/10/13  63.020   96.067  96.800        96.870    272    4.130    11.000     56.500               7706
10/23/13  64.990   99.070  96.900        99.460    282    4.128     9.000     59.200               8303
11/26/13  64.900   98.933  97.200        99.0      281    4.130    11.000     50.500               9575
4/19/15	63.420   96.677  96.000        97.390    275	 4.112	 11.000	  53.900               28,501

 

[NasGoreList]

your last data point can't be right, no way you lost only 1Ahr in 20k miles and 16 months.....

 

[lorenfb]

your last data point can't be right, no way you lost only 1Ahr in 20k miles and 16 months.....

Especially for a 2013! Mine (12/2013) at about 20K is at 56 Ahr (~ loss 3-4 Ahr).

 

[bradbissell]

All data taken via screenshots, so no question it is right. The wonders of living in a cold climate.

 

[edatoakrun]

All data taken via screenshots, so no question it is right...

Sorry to have to contradict you, but there is actually no question, the LBC report data is wrong.

The question is how inaccurate (how wrong) your LBC data is.

Your LEAF's instrumentation is not capable of calculating values to the level of accuracy as posted.

If you'd like to know how inaccurate those LBC reports are, and whether they are overstating or understating your actual available battery capacity, I'd suggest you test your pack's range capacity and recharge capacity.

But you may not need to hurry, since it might be some more time before you have lost enough available battery capacity, so that you can detect a loss with significant accuracy by those methods.

 

[gbshaun]

There is something fishy about the figures:
eg (rounding to one decimal point)
as of 10/10/13 = 63.0 Ahr
Two weeks later = 65.0 Ahr

ie it actually GAINED 2 Ahrs
I've been monitoring mine frequently for the past year, and the biggest capacity apparently ever regained =~0.1Ahr

Another place:
9/18/13 capacity= 65.1 Ahr
8 days later = 63.6 Ahr
= drop of 1.5Ahr's in just over a week
I think the most I've ever seen mine apparently drop is 0.27 Ahr in 10 days (warm week)

I don't have the knowledge to suggest why this should be happening. Faulty information sent out from the car? Different gadget plugged into the port?

Shaun

 

[memoryisram]

Ahr: 44.49
SOH: 67%
Hx: 46.87%

I'm so close to losing the next bar, a few more hot Palm Springs days and it'll be toast. It's a 2011 and has spent most of it's time in the cooler San Diego climate, but coming here to Palm Springs during the summer murdered the capacity.

 

[RegGuheert]

Nice shot of cell voltage loss inspection (CVLI), memoryisram! Right at the correct voltage, too!

If you happen to still have that screen on your phone, it would be great to see it with the y-axis zoomed.

This is how I'm hoping to get my pack repaired/replaced once it degrades while out of the capacity warranty. (I know, so far no one has had success doing that...)

 

[bradbissell]

Perhaps LeafSpy is totally wrong, but overall my degradation is less than I would have expected. The car showed 281 Gids today after a full 100% charge. In the end, I'm not going to complain. The car is totally useful for my 52 mile commute.

 

[DNAinaGoodWay]

My Ahs and GIDs fluctuate like that too. Weird, but now that it's warmer I have no trouble getting 100 miles, so I don't care. Degradation is as minimal here as it will be anywhere. Feeling confident about buying my next EVs and driving more than on a lease.