hmmwv
Posts: 79
Joined: Wed Jun 10, 2015 8:27 am
Location: Seattle, WA

Re: Post Your Battery Degradation Results

Mon Jun 12, 2017 12:53 pm

hmmwv wrote:Here is my latest readings, this is an early 2013 build. I expect to lose my first bar sometime this summer.

AHr: 57.78
SOH: 88%
Hx: 85.5%
24QC & 1635 L1/L2
Mileage: 38,762


Finally crossed the 40,000 miles mark. Here is my latest figures:
AHr: 57.13
SOH: 87%
Hx: 84.22%
24 QC & 1674 L1/L2
Mileage: 30,159
2013 LEAF SL w/Premium Pkg, Brilliant Silver, 45,113 miles, LeafSpy: 56.28 AHr, SOH 86%, Hx82.37% as of 11/20/2017, 11 bars, 27 QC, 1830 L2/L2

qualitytech123
Posts: 8
Joined: Tue Oct 25, 2016 7:11 am
Delivery Date: 19 Sep 2016
Leaf Number: 019880

Re: Post Your Battery Degradation Results

Thu Jun 15, 2017 7:21 am

I have a 2012 Leaf. I bought it used in September of 2016. I still have 12 bars and the GOM reads 75 miles avg (full charge) at 47K. Based on what I've read, I should have less life in my battery if it is the original. How can I tell if this car has a replacement battery? Thanx

I live in Maryland - hot summers and cold (not frigid) winter temps.

bigbearballs
Posts: 55
Joined: Sun Feb 21, 2016 9:57 am
Delivery Date: 21 Feb 2016
Location: Austin, TX

Re: Post Your Battery Degradation Results

Wed Jul 05, 2017 9:32 am

I lost my second bar and immediately took these readings. I have a 14 SL. Can anyone predict if I'll lose two more bars before 2/19?

AHr: 51.45
SOH: 78%
Hx: 70.69%
odo: 41,855 miles

User avatar
lpickup
Posts: 985
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 23 Dec 2016
Leaf Number: 312310
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Wed Jul 05, 2017 10:57 am

bigbearballs wrote:I lost my second bar and immediately took these readings. I have a 14 SL.

It's definitely not that simple. Even if we had a detailed track record of your past stats, it depends on your climate (i.e. how hot this summer and next are), how many miles you are going to drive it, what kind of charging you are subjecting the car to, etc. I found that I was able to get some relatively accurate predictions after 3 bars and within about 7500 miles of losing that 4th bar, but it was so dependent on the weather that once summer was over my predictions got to be way off.
...Lance

Coulis Red 2016 SV (312310)
Delivered: 12/23/16
Glacier Pearl 2012 SL (016138)
Delivered: 12/9/11; traded in 12/23/16
NOGA$4ME Blog

oleviking
Posts: 37
Joined: Fri Oct 14, 2016 6:35 am
Delivery Date: 21 Oct 2016
Leaf Number: 301969
Location: Orlando, FL

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 5:44 am

Mileage 7,293
Lost 1st Bar
SOH 78%
Hx 76.75
AHr 62.68

2016 SV, Living in Florida, leased this car 10/2016 and I suspect the dealership had it for several months before I got it. I usually QC in the morning for around 15 minutes, getting the SOC up in the 80% range. Didn't know I had lost a bar until I L2 charged overnight to 100% as I was going somewhere the next morning.

Going to Nissan to have them check both batteries.

User avatar
lpickup
Posts: 985
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 23 Dec 2016
Leaf Number: 312310
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 8:56 am

oleviking wrote:Going to Nissan to have them check both batteries.


Don't want to talk you out of it, but all they are probably going to do is get the same measurements you get out of LEAFSpy and then requote you the warranty terms (5 years, 60K miles, 4 bars).

If, as you suspect, you are losing bars at a faster rate than you should, then you will no doubt lose your 4th bar before those limits expire, at which time (and only at which time) they would replace your battery. I doubt they would do anything beforehand due to a suspected failure.

Having said that, you should probably check the full battery cell display. LEAFSpy will indicate weak cells (plus they will be pretty obvious in the graph. If you do have a small number of cells that are way below the voltage of the others, then that is at least something you could discuss with them.
...Lance

Coulis Red 2016 SV (312310)
Delivered: 12/23/16
Glacier Pearl 2012 SL (016138)
Delivered: 12/9/11; traded in 12/23/16
NOGA$4ME Blog

oleviking
Posts: 37
Joined: Fri Oct 14, 2016 6:35 am
Delivery Date: 21 Oct 2016
Leaf Number: 301969
Location: Orlando, FL

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 10:17 am

How do you tell the weak cells, I have the photo of the Leaf Spy reading, not sure how to post it here though.

User avatar
lpickup
Posts: 985
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 23 Dec 2016
Leaf Number: 312310
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 10:33 am

Well if you are looking at the cell voltage display (96 lines running vertically) if you see any that are much shorter than the others (you should look at this when you are at a low stage of charge--when full they will be more or less even), then those are your weakest cells. If you see that there are only a few weak cells that are quite a bit shorter than all the rest, then those cells would be considered "weak" and could potentially identify a problem with those particular cells.

Otherwise if all the lines are all pretty close, then the degradation is across the pack as a whole and it's unlikely that there is any kind of manufacturing defect that would explain your loss other than normal degradation.
...Lance

Coulis Red 2016 SV (312310)
Delivered: 12/23/16
Glacier Pearl 2012 SL (016138)
Delivered: 12/9/11; traded in 12/23/16
NOGA$4ME Blog

oleviking
Posts: 37
Joined: Fri Oct 14, 2016 6:35 am
Delivery Date: 21 Oct 2016
Leaf Number: 301969
Location: Orlando, FL

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 1:33 pm

OK, what about blue vs red? I have 9 blue lines, the rest are red.

User avatar
lpickup
Posts: 985
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 23 Dec 2016
Leaf Number: 312310
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Fri Jul 07, 2017 1:53 pm

oleviking wrote:OK, what about blue vs red? I have 9 blue lines, the rest are red.


Blue vs red show which cells are "shunted" I believe. Shunting is used to balance the pack and is a normal operation. Don't worry about that. Just concentrate on the raw height of the bars.

You can also look at the Voltage Histogram chart. Ideally you want a very tall peak right in the middle, with a few smaller bars to the left and right. If you see a few outliers way to the left, that might indicate some weak cells (outliers to the right wouldn't be good either, but it's hard to imagine that would be a realistic scenario).
...Lance

Coulis Red 2016 SV (312310)
Delivered: 12/23/16
Glacier Pearl 2012 SL (016138)
Delivered: 12/9/11; traded in 12/23/16
NOGA$4ME Blog

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