EnigmaEV
Posts: 21
Joined: Mon May 07, 2018 9:52 am
Delivery Date: 31 Mar 2018
Leaf Number: 301349
Location: Saskatchewan, Canada

Re: The 40KWH Battery Topic

Fri Nov 15, 2019 1:34 pm

In my experience, Nissan seems to want you to think you have far less battery remaining than you actually do. I find it falls mostly linear until about 50% than far faster until about 10%. On several trips I've seen the GOM drop to 10%, rise back over 20% then very slowly drop back down all while driving at consistent highway speeds. Leafspy readings seem to be consistent throughout and at 2% on the GOM, Leafspy was still showing 6.4 kWh remaining. Here are some stats from that trip - my most inefficient one yet!

Conditions: -29C (-20F), dark, 15 kph (9 mph) crosswind, mostly flat terrain, 106km (66mi) round trip, average speed 75 kph (47 mph)

Start:
GOM: 100%, 174km (109mi)
Leafspy: 34.8 kWh available, battery temp 2.2C (36F)

Finish:
GOM: 2%, ---km, very low battery warning
Leafspy: 6.4 kWh available, 29.8 kWh used (I know, the math doesn't add up!), battery temp 16.3C (61F)

Efficiency: 3.56 km/kWh (2.22 mi/kWh) => calculated range of 124km (77mi) based on original 34.8 kWh indicated by Leafspy and assuming it would keep going to 0 kWh indicated.
2018 Leaf SL, 35,632 km, SOH - 93.66%, Hx - 117.29, AHr - 108.121

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Fri Nov 15, 2019 5:04 pm

Excellent info!

On my return trip I went from 100% to 24%.
Leafspy shows 34.1% remaining as opposed to the cars 24%.

My return efficiency was also a bit higher. I made some stops but the longest segment had the lowest average was 3.56 mi per kWh. Had to check out the status of a EA charger.

I also noticed 100% charge is 96.4% (401.5 v) in leafspy. Once before I charged to 100% and saw 98.7% in leafspy (403.49 v)
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 14207
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Fri Nov 15, 2019 6:22 pm

danrjones wrote:
Fri Nov 15, 2019 5:04 pm
Excellent info!

On my return trip I went from 100% to 24%.
Leafspy shows 34.1% remaining as opposed to the cars 24%.

My return efficiency was also a bit higher. I made some stops but the longest segment had the lowest average was 3.56 mi per kWh. Had to check out the status of a EA charger.

I also noticed 100% charge is 96.4% (401.5 v) in leafspy. Once before I charged to 100% and saw 98.7% in leafspy (403.49 v)
Notice your GOM is "bloated" at full charge, then seems to drift downwards rapidly. This is because its building its hidden reserve. I have found my GOM on full charge to be well within 5% of my actual range but still tells me I am at double _ _ _ (GOM and SOC) when LEAF Spy says I have 15 more miles of range. This is why LEAF Spy is so valuable. It adds 15 "stress free" miles to your usable range.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 412 mi, 99.72% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Fri Nov 15, 2019 7:54 pm

I have pretty well ignored the GOM. I pay more attention to %. Its obviously not perfect but I find it more useful.

I'm thinking the GoM uses your rescent efficiency in its calculation. So most of the time we are in town and getting 4 to 5 miles per kWh. Then today I get on the highway and suddenly I'm getting 3.3 over two nearly full charges. I do not think it adequately takes that into account. When I left this am it said something like 160 miles. Lol

Maybe at 45 mph.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 14207
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Sat Nov 16, 2019 8:49 am

danrjones wrote:
Fri Nov 15, 2019 7:54 pm
I have pretty well ignored the GOM. I pay more attention to %. Its obviously not perfect but I find it more useful.

I'm thinking the GoM uses your rescent efficiency in its calculation. So most of the time we are in town and getting 4 to 5 miles per kWh. Then today I get on the highway and suddenly I'm getting 3.3 over two nearly full charges. I do not think it adequately takes that into account. When I left this am it said something like 160 miles. Lol

Maybe at 45 mph.
I think you missed my point. The only time I look at it is on a full charge. Since I have LEAF Spy, I see no reason to look at it any other time. I also reset my trip computer daily so figuring out my range from a charge that might last 3 days is also not really possible either.

As far as how the GOM calculates range, you are correct and that has been true since day one but I do see the GOM becoming more accurate. Previously, it would be as much as 20% off at full charge. I mentioned it being being less than 5% off on my 40, but there were a few times it was nearly dead on so it is considering more driving history than earlier versions of the LEAF.

But range predictions shouldn't be considered more than simply one data point among several you need to consider. Its like Tesla's range predictions. They have the same issues and some people swear by it while others swear at it. In the end, the range is still on you.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 412 mi, 99.72% SOH
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LeftieBiker
Moderator
Posts: 13438
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: The 40KWH Battery Topic

Sat Nov 16, 2019 2:40 pm

My Fall stats - a bit late:

AH: 105.97

SOH: 91.80%

PACK VOLTAGE: 379.51

Hx: 105.75

ODOMETER: 2843 MILES

SOC: 77.8%

18 QCs & 97 L-1/L-2S

24 MV Differential


NOTES:

* My efforts to preserve capacity by cooling the garage in hot weather don't seem to have done much - unless the SOH would be worse without them, in which case this is NOT a very heat-resistant pack. Degradation seems to be averaging a little over 5.3% a year with garage cooling.

* I almost never charge to 100% anymore, but the pack is still fairly well balanced. One EQ charge every 6 months is probably all I need.

* Yes, the odometer reading is correct.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Sat Nov 16, 2019 3:18 pm

LeftieBiker wrote:
Sat Nov 16, 2019 2:40 pm
My Fall stats - a bit late:

AH: 105.97

SOH: 91.80%

PACK VOLTAGE: 379.51
Is the pack voltage something to watch? I assumed everyone would have close to the same voltage at full and empty, but their AmpHrs would vary based on degradation.

I live in a much hotter area than you and here are my specs as of yesterday after a long trip for service, all from leaf spy. I parked outside day and night.

AH: 107.52

SOH: 93.14%%

PACK VOLTAGE: 345.54V

Hx: 105.32

ODOMETER: 3040 MILES

SOC: 34.2%

4 QCs & 166 L-1/L-2S

18 MV Differential


One interesting thing to note is that yesterday's trip with a fast charge in the middile jumped my HX from 104.83 to 105.32 in one day. It has been going down until then from our cooler weather (I presume).

Also note my 3 month adjustment is coming in about 2-3 weeks. If there is one.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 14207
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Sat Nov 16, 2019 6:14 pm

Yeah, wondering if more exercise would help pack numbers. I know someone who recently went to a Plus (a common thing it seems ;) ) but had 50,000 miles on his 40 kwh and just under 91% SOH.

My stats 25,185 miles, ahr 106.47, SOH 92.23%, HX 117.23% 261 QCs, 200 L2's.

And.... well, some people never learn and I guess I am one of them :)
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 412 mi, 99.72% SOH
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DougWantsALeaf
Posts: 1057
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: The 40KWH Battery Topic

Sat Nov 16, 2019 6:29 pm

If 150 miles meets your needs, no reason to buy another car, except to invest to help the industry move forward.
2019 SV Plus Silver
2013 Leaf SV
100 Mile Club Member (Number 87)
Max distance on 13 Leaf: 120 miles
Max distance on 19 Leaf: 242 Highway 4.5 miles/kWh (4.9 KWh remaining)

DaveinOlyWA
Posts: 14207
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Sun Nov 17, 2019 7:18 am

DougWantsALeaf wrote:
Sat Nov 16, 2019 6:29 pm
If 150 miles meets your needs, no reason to buy another car, except to invest to help the industry move forward.
Not always true. Stay tuned for details.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 412 mi, 99.72% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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