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Re: The 40KWH Battery Topic

Posted: Mon Sep 23, 2019 7:59 am
by danrjones
HerdingElectrons wrote:
Fri Sep 20, 2019 11:11 pm
A/C or Heat as well as "Eco" vs std mode. The GOM show 2-7 miles of additional range depending on my SOC when I toggle the Eco button
I haven't used the heater yet, so that will be interesting to see what that does to range. I have the weather package though, which was suppose to be a lot better than without. I tried the seat heater and it felt nice, didn't appear to change the GOM.

The nice thing is, since we only put about 20-30 miles per day I never really need to worry. I've noticed that when I drive I averaged about 4.1 miles / kWh and when my wife did she averaged about 3.75 miles / kWh this summer. (someone might be a lead foot!) But that's still a lot better than my truck or even our outback. Even if she cranks the heat up this winter I have to believe its still a lot better than getting 13 mpg in my truck or 23 in the outback. Our outback was suppose to be 32 highway 24 city but around town it never gets much above about 23. And that is a 4 cyl.


Checked my data this AM and my HX has started to drop. Noticed my average battery temps now in the low to mid 70s instead of mid 100s this summer.

Re: The 40KWH Battery Topic

Posted: Mon Sep 23, 2019 10:40 am
by HerdingElectrons
I have the SL so we have the same "HVAC" system. The heat pump seems to be similar in efficiency in either temp direction however winter temps are a much greater temp differential than Sumer temps relative to our skin temp so the power draw is roughly double in winter vs summer although seat & steering wheel heating can mitigate that spending on your clothing choice & tolerance level.

To be honest your consumption for both of you is on the high side so the HVAC consumption will be smaller chunk of total energy consumed but you daily range needs are so small it's immaterial.

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?

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%