Page 47 of 80

Re: The 40KWH Battery Topic

Posted: Mon Sep 23, 2019 12:42 pm
by danrjones
HerdingElectrons wrote:
Mon Sep 23, 2019 10:40 am

For comparison I get 4.8-4.9 in the summer & around 3.7-3.9 in the winter and of course in between in spring & fall. Any chance your tire psi is at 39 cold?
I haven't checked the tires for about a month. It was blazing hot outside at that time, but ever since I brought it home I've been around 4.1 and my wife upper 3's on average. Part of it might be lots of shorts drives, so each time it has to cool the cabin down. Its just getting cool inside and my drive is done. I also don't use eco mode. I'm not too worried about it. Pretty sure my wife is lower because she drives it harder.

In the morning I'll get something like 4.5 going to work. Lunch maybe 4.0. Going home like 3.6. Could be elevation, more likely AC usage. Not sure yet if it will flip this winter.

All in all, i'm happy with it. Gas is 3.49 right now and at night my power is 0.12 / kWh. I'm well ahead.

Re: The 40KWH Battery Topic

Posted: Mon Sep 23, 2019 4:27 pm
by HerdingElectrons
We're all WAY ahead, gas is now 3.69/gal here & $.16/kWh so I feel ya there. I was doing 4.2 last summer when I first got the car so there's potential if you care to play the efficiency game more but it's already so much cheaper that's simply more for personal challenge than real economic savings.

Re: The 40KWH Battery Topic

Posted: Wed Oct 16, 2019 8:03 am
by danrjones
Updated Battery Stats below. As the weather has cooled, you can see SOH decline rate dropped, and HX has started dropping.

Can't remember my ODO at the moment and leafspy never reports it correctly, so I'll add it later. Battery Temps this AM were around 68 for the three averaged.

Date SOH AMPHr Hx
5/3/2019 97.63 112.7 97.5
5/6/2019 97.62 112.69 97.94
5/7/2019 97.61 112.68 98.03
5/10/2019 97.6 112.67 98.39
5/13/2019 97.59 112.66 98.55
5/15/2019 97.58 112.65 98.73
5/19/2019 97.57 112.63 98.84
5/27/2019 97.55 112.61 99.27
6/1/2019 97.53 112.59 99.61
6/4/2019 97.5 112.55 100.12
6/11/2019 97.44 112.48 101.03
6/12/2019 97.43 112.47 101.25
6/13/2019 97.42 112.46 101.25
6/14/2019 96.49 111.39 101.58
6/15/2019 96.28 111.15 101.58
6/16/2019 95.64 110.41 101.67
6/17/2019 95.42 110.15 101.82
6/19/2019 95.4 110.13 102.15
6/20/2019 95.38 110.11 102.25
7/15/2019 95.19 109.89 103.22
7/24/2019 95.1 109.78 104.04
8/11/2019 94.9 109.55 104.95
8/30/2019 94.73 109.36 106.05
9/05/2019 94.68 109.3 106.27
9/10/2019 94.65 109.26 106.45
9/11/2019 94.64 109.25 106.48
9/12/2019 94.5 109.09 106.47
9/13/2019 93.73 108.2 106.48
9/14/2019 93.3 107.71 106.45
9/15/2019 93.29 107.69 106.45
9/17/2019 93.28 107.68 106.42
9/19/2019 93.27 107.67 106.41
9/23/2019 93.25 107.65 106.25
9/29/2019 93.23 107.62 106.5
10/16/2019 93.19 107.58 105.56

Re: The 40KWH Battery Topic

Posted: Wed Oct 16, 2019 10:15 am
by Astros
My 40kWh and 60kWh Leaf seem to be following the same degradation curve. The SOH drops uncomfortably quickly until the odometer reached 7000 miles, and then the decline slows down to about 1/3 the rate. That’s after taking out the big drops every 90 days, of course.

Re: The 40KWH Battery Topic

Posted: Wed Oct 16, 2019 7:32 pm
by DaveinOlyWA
Astros wrote:
Wed Oct 16, 2019 10:15 am
My 40kWh and 60kWh Leaf seem to be following the same degradation curve. The SOH drops uncomfortably quickly until the odometer reached 7000 miles, and then the decline slows down to about 1/3 the rate. That’s after taking out the big drops every 90 days, of course.
my drop is now 5 days late (never more than 2 days off the 90 day cycle before) and considering the last adjustment went up, I am thinking the BMS is simply a lot slower getting a fix on the pack than previous models :roll:

Re: The 40KWH Battery Topic

Posted: Thu Oct 17, 2019 5:12 pm
by jmurtagh13
2018-03-09
12 miles
SOH 99.61
Hx 98.86
AHR 115.0

2018-07-14 SOH loss 2.48%
3215 miles
SOH 97.13
Hx 111.58
AHR 112.13

2018-09-21 SOH loss 3.56%
3753 miles
SOH 96.15
Hx 111.74
AHR 111.00

2018-10-18 SOH loss 4.7%
5190 miles
SOH 94.91
Hx 112.07
AHR 109.56

2018-12-31 SOH loss 4.84%
7143 miles
SOH 94.77
Hx 111.47
AHR 109.40

2019-01-15 SOH loss 5.92%
7559
SOH 93.69
Hx 111.75
AHR 108.16

2019-01-21 SOH loss 7.4%
7729 miles
SOH 92.21
Hx 111.97
AHR 106.45

2019-03-01 - Last 3 months loss 1.57 1 Year SOH drop 7.49%
8708 miles
SOH 92.14
Hx 112.26
AHR 106.37

2019-04-06
9738
SOH 92.09
Hx 112.27
AHR 106.31

2019-06-13 – SOH decrease - .75% last 3 months -.8% YTD loss 3.43% Total loss 8.27%
SOH 91.34
AHR 105.44

2019-07-10 – SOH decrease -.14% Last 3 months -.89% Total loss -8.41%
12,330 miles
SOH 91.20
Hx 113.8
AHR 105.28

*2019-07-12 - SOH increase +.47% to 91.67 Last 3 Month loss .42 total Loss 7.94%
12.373 Miles
SOH 91.67
Hx 113.83
AHR 105.83

2019-09-10 (18 months) Decrease -27% - SOH 91.4% last 3 months Gain +.06; Last 6 months decrease -.74%
Last 1 Year lost 4.75%
13,800 Miles
SOH 91.4
Hx 113.57
AHR 105.51

*2019-10-13 (19 months) Increase +.52% - SOH 91.92% last 3 months Gain +.25; Last 6 months decrease -.17%
Last 1 Year lost 2.99% Total Loss 7.69%
14,455 miles
SOH 91.92
Hx 113.52
AHR 106.11

In July and October I had an upward correction of .47% and .52% this left me with a total loss for the summer (6 months) of only .17%
The first year was the bad one where I lost 7.49%. My total loss at 19 months is 7.69%, so for the last 7 months I have a very small loss or the BMS is just making up for it’s over zealous first year estimate. Who knows

Re: The 40KWH Battery Topic

Posted: Thu Oct 17, 2019 5:53 pm
by LeftieBiker
I'm coming up on the 18 month mark on November 1st. I'll check mine then.

Re: The 40KWH Battery Topic

Posted: Thu Oct 17, 2019 7:53 pm
by sthbeach
2018 Nissan Leaf SL
Ontario, Canada
46,000 kms = 28,583 miles
SOH : 93.96%

I check it weekly with LeafSpy and I have never seen my SOH go up it just goes down daily at a rate of .02%

Re: The 40KWH Battery Topic

Posted: Fri Oct 18, 2019 2:18 am
by Dala
I checked the stats on the 40kWh I have in storage

Image

2018 / x? model
6 000km
SOH = 95,9%

Re: The 40KWH Battery Topic

Posted: Fri Oct 18, 2019 3:21 am
by golfcart
Holding relatively steady in the 94.xx% range. After the large drop in May/June I've just been seeing very slow degradation of about 0.2% each month.

Date SOH% SOH %Chg Ahr Ahr %Chg TempF

3/15/19 97.47 -2.53% 112.52 -2.53% 69.1
4/15/19 97.41 -2.59% 112.45 -2.59% 75.2
5/15/19 97.34 -2.66% 112.37 -2.66% 82.2
6/15/19 95.38 -4.62% 110.11 -4.62% 90.8
7/15/19 94.98 -5.02% 109.64 -5.02% 97
8/15/19 94.63 -5.37% 109.24 -5.37% 101.8
9/15/19 94.41 -5.59% 108.99 -5.59% 92.2
10/15/19 94.26 -5.74% 108.81 -5.74% 81