Post Your Battery Degradation Results

[Valdemar]

Did my first "drive to nowhere" today, in an effort to increase the number of charge cycles despite not really having much of anyplace I need to be. It's not that onerous - in D with a fair bit of acceleration and cruising only slightly above legal highway speeds my car is only good for about 35 miles anymore, so I can go from fully charged to fairly well discharged in around a half-hour.

Why not just run the heater all the way to turtle and do something useful meanwhile?

 

[ishiyakazuo]

Did my first "drive to nowhere" today, in an effort to increase the number of charge cycles despite not really having much of anyplace I need to be. It's not that onerous - in D with a fair bit of acceleration and cruising only slightly above legal highway speeds my car is only good for about 35 miles anymore, so I can go from fully charged to fairly well discharged in around a half-hour.

Why not just run the heater all the way to turtle and do something useful meanwhile?

I suspect they're recording all sorts of fun data like that...

 

[DaveEV]

D with a fair bit of acceleration and cruising only slightly above legal highway speeds my car is only good for about 35 miles anymore

Your sig says 50-55 mi / charge?

With 48.7 Ah right now if I drive without regard to efficiency, I'll get LBW in the low 40 mile range (3.6 mi/kWh). Knock off about 7-8 miles if I charge to 80%. I took it down to 20 GIDs / 9.7% the other day and made it 57.9 miles @ 4.1 mi/kWh (17.7 kWh to recharge from the wall).

I'm currently losing capacity at just under 4 Ah / year. With only 9 months to go before I hit 5 years, I will lose about another 3 Ah putting me just under 46 Ah. This would seem to put me at my 4th bar lost at around the 6 year mark.

Since it seems very unlikely that I'll lose 4 bars in time to get the warranty, I probably should go back to trying to be extra nice on the battery instead of halfway nice, though it does not seem to make that much of a difference.

 

[mwalsh]

Your sig says 50-55 mi / charge?

In ECO, driving like a grannie on her way to the church social.

 

[Henchman]

Here's my numbers since I bought my used Leaf in March.
It seems I have. A particularly crap battery.
I just started taking note of the Ahrs.
Leaf Battery stats

Started:
3/25  SOH 81% Hx 64%
4/12  SOH 77% Hx 58%
4/14  SOH 76% Hx 57%
4/21  SOH 75% Hx 56%
4/29  SHO 75% Hx 55%
5/1    SHO 74% Hx 55%
5/21  SOH 74% HX 54%
6/9    SOH 73% HX 53%
7/25  SOH 72% HX 52%
8/25  SOH 72% HX 51% LOST 3rd Bar 22000 miles 47.5 Ahr
9/5. SOH 71% HX51% 46.88 Ahr

Hopefully I'll drop the next bar before the warranty is up

 

[keydiver]

Wow, where are you located? I've never seen anyone lose 10% in 6 months (other than those that had their BMS reset). Do you know what date your Leaf was put into service?

 

[dhanson865]

Here's my numbers since I bought my used Leaf in March.
It seems I have. A particularly crap battery.
I just started taking note of the Ahrs.
Leaf Battery stats

Started:
3/25  SOH 81% Hx 64%
4/12  SOH 77% Hx 58%
4/14  SOH 76% Hx 57%
4/21  SOH 75% Hx 56%
4/29  SHO 75% Hx 55%
5/1    SHO 74% Hx 55%
5/21  SOH 74% HX 54%
6/9    SOH 73% HX 53%
7/25  SOH 72% HX 52%
8/25  SOH 72% HX 51% LOST 3rd Bar 22000 miles 47.5 Ahr
9/5. SOH 71% HX51% 46.88 Ahr

Hopefully I'll drop the next bar before the warranty is up

Yeah, that has to be a reset BMS.

Car from Arizona? Southern California? Texas?

Can we get the manufacturing date from the driver door jamb label?

And is it a 2012 Model?

|- style="background:#ffffff;" valign=top
| #
| Aug 25, 2015
| Henchman
| City, ST?
| 22,000
| ?? months
| mfg date?
| 201? Model Year?
| 8376
|
|
| http://www.mynissanleaf.com/viewtopic.php?f=31&t=13371&start=440#p436020

 

[Stanton]

Did my first "drive to nowhere" today, in an effort to increase the number of charge cycles despite not really having much of anyplace I need to be. It's not that onerous - in D with a fair bit of acceleration and cruising only slightly above legal highway speeds my car is only good for about 35 miles anymore, so I can go from fully charged to fairly well discharged in around a half-hour.

Join the club! I did one of those yesterday (ok, went downtown to the Farmer's Market, but there's a *free* charger near there which helps keep my battery temp up), and am getting ready to do another today (to a different *free* charger). My goal on these things is to trigger that 7th TB, and my LeafDD tells me I get to 106+ when the outside temps are close to 100. Problem is, those days will soon be gone, which will makes these sort of trips less effective at dropping Amps.

 

[Evoforce]

I am still having the same degradation on both the 2011 battery and the 2015 battery. Both cars have lost an additional 1% just in the last week since I reported. 9 bar car now at 67% and lizard is 96%.

Lizard battery has lost an additional 1% in less than a week. It now has lost 5% in less than 2 months.

SOH 95%
SOC 89.3%
AHr 61.17
GIDs 256

Posting in thread... 2015: Battery Data Report @ 100% Charge

 

[jhm614]

Lizard battery has lost an additional 1% in less than a week. It now has lost 5% in less than 2 months.

SOH 95%
SOC 89.3%

Are you tracking the Ahr as well? What are those values?

Thanks,

J.

 

[Evoforce]

Lizard battery has lost an additional 1% in less than a week. It now has lost 5% in less than 2 months.

SOH 95%
SOC 89.3%

Are you tracking the Ahr as well? What are those values?

Thanks,

J.

Yes, revised now above your post

 

[Valdemar]

Here's my numbers since I bought my used Leaf in March.
It seems I have. A particularly crap battery.
I just started taking note of the Ahrs.
Leaf Battery stats

Started:
3/25  SOH 81% Hx 64%
4/12  SOH 77% Hx 58%
4/14  SOH 76% Hx 57%
4/21  SOH 75% Hx 56%
4/29  SHO 75% Hx 55%
5/1    SHO 74% Hx 55%
5/21  SOH 74% HX 54%
6/9    SOH 73% HX 53%
7/25  SOH 72% HX 52%
8/25  SOH 72% HX 51% LOST 3rd Bar 22000 miles 47.5 Ahr
9/5. SOH 71% HX51% 46.88 Ahr

Hopefully I'll drop the next bar before the warranty is up

Did you happen to record gid count on a full charge for these data points?

 

[pjoseph]

Congrats on qualifying for a warranty battery! Out of curiosity, do you plan to ride out the summer with the old battery to spare the new one the wear?

Intriguing dilemma but the car is increasingly untenable in its current state.

48 mi range
3.3 KW onboard c
80 mi daily driving

Ambient temperatures still in the mid 90s and my battery swap is scheduled in about a week.

 

[TomT]

My new Lizard battery has now lost about 2% (or more, depending on which metric you use)... I suspect a portion of that happened during the three weeks of exceptionally high heat we had here (I saw a battery temp of 100+ and seven temperature bars a number of times). I've also done 5 QCs since the battery was installed, but never more than one in a day... Based on what I am seeing (and hearing from others), I'm not as confident of the Lizard as I was initially and whether or not it has actually solved the heat degradation problem...

I am still having the same degradation on both the 2011 battery and the 2015 battery. Both cars have lost an additional 1% just in the last week since I reported. 9 bar car now at 67% and lizard is 96%.

 

[tkdbrusco]

Your stats are really strange. I wonder if it has something to do with the fact that it was installed in a 2011 car? Shouldn't make a difference though. My 2015 has 17K miles on it now and we are getting 289 Gids on a full charge. The lowest I have ever seen is 276 in the dead of winter this January (that was with about 11K miles).

 

[mwalsh]

Your stats are really strange. I wonder if it has something to do with the fact that it was installed in a 2011 car? Shouldn't make a difference though. My 2015 has 17K miles on it now and we are getting 289 Gids on a full charge. The lowest I have ever seen is 276 in the dead of winter this January (that was with about 11K miles).

A long, long time ago, some of us suggested that there might be something fundamentally wrong with the LEAF's insturmentation, and the temporary gain in AHr I saw from the P3227 update (that was actually usable) not only revived that discussion in my memory but also did not completely dissuade me that it might be the case. If Nissan hasn't investigated this as a possibility for these packs appearing to degrade faster than expected, they certainly should.

 

[mtndrvr]

2013 Leaf, purchased in April 2014

4/27/15
12,094 miles
65.96 Ahr
97% SoC
284 GIDs

9/22/15
19,294 miles
62.7 Ahr
97 SoC
272 GIDs

 

[peakay]

Just recently picked up a GID meter and am shocked by what I see this morning. hopefully its an anomaly, but this battery appears to be going south fast:

9/28/15 7:30 am after overnight charge:

2012 Leaf w/21,000 Miles
11 Bars (-1)
204 Gids
88.2 SOC

 

[Stanton]

Just recently picked up a GID meter and am shocked by what I see this morning. hopefully its an anomaly, but this battery appears to be going south fast:

9/28/15 7:30 am after overnight charge:

2012 Leaf w/21,000 Miles
11 Bars (-1)
204 Gids
88.2 SOC

On the contrary, that looks pretty good to me! GIDs are in the eye of the beholder. Where do you live?

 

[DiamondDan73]

I bought a used 2012 SL with 9 bars on Sept 1st 2015 and had the P3227 reprogram done next day.

Sept 1 38,950 mi AHr 42.94 SOH 65% Hx 58.77%
Sept 2 38,950 mi AHr 50.80 SOH 65% Hx 58.58%
Oct 1 40,900 mi AHr 45.66 SOH 69% Hx 49.02%

I am getting between 193-195 GIDs on a full charge.