goldbrick
Posts: 1376
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 11:40 am

I do think 75mph is a big factor. I'd guess-timate twice the range at 35mph than 75mph. Speed makes a big difference and the effect increases exponentially not linearly.

LeftieBiker
Moderator
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 2:19 pm

Two minutes at 75MPH wouldn't cost a lot of range, barring a hill or headwind. 5+ minutes would.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

alozzy
Posts: 2035
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 4:06 pm

@derbartman Do this simple range test when: the ambient temperature is above 32F (is possible), it's not raining or snowing, and it's not windy.

You'll need to pick a highway route that's not hilly over a 25 mile route (occasional gentle hills OK) and has a speed limit of 60 MPH or lower.
  • Charge to 100%, using a charging location close to your selected highway route
  • Get on the highway ASAP, in the slow lane, and set the cruise control to 55 MPH and reset your trip counter
  • Drive until the SOC is 75%
  • Note the trip counter mileage
Multiply the number of miles on the trip counter by 4 - the result is a reasonably good estimate of the true range of your LEAF at this time of year.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

LeftieBiker
Moderator
Posts: 17290
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 4:24 pm

You can also do 20% and multiply by 5, etc. The shorter the distance traveled, though, the less reliable the estimate.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

derbartman
Posts: 28
Joined: Sun Jan 03, 2021 1:41 pm
Delivery Date: 03 Jan 2021
Leaf Number: 304749

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 7:58 pm

ok new updates on this issue:
I took it to the dealer and they did the dealer battery test and said it all looked good.
They did test the 12v battery and replaced it.
They claim the BMS software update was done ~ a year ago when the last dealer battery test was performed.

I filled up the tire - all were around 36 which seems to be spec in the door label.
I doubled checked and charged up the 12v battery to 100%
I reset all the miles and average counters

So new empirical data:
wife drove her commute this morning it was cold (21F) .
She estimates its ~10 miles of freeway out of the one way 20.

She says she got to work with about 80% battery - so 1:1 % per mile - which is great!
but - tonight she drove home and the rate of consumption was much higher and she ended up home with 33% battery.
20% one way and 47% the other way doesn't seem right at all. Now I started to wonder if we have some elevation difference. It was more windy on the way home.

This sort of pretty good one way and then pretty bad way back feels like last time too.
So question is - is there commonly a non linearity of the displayed % of the battery charge - like does everyone experience the first "20%" does as much as the next 40%?

Even if one explained the bad return on wind and cold etc.. there seems to be another question which is why does the car tell us it got 4.2 miles per kwh for the trip? It seems to me that if it got 4.2 miles per kwh and we went 40 miles it thinks it used 9.5kwh. It seems that if it was left with 33% and thus 67% = 9.5kwh then it thinks I have a 14 kwh battery - not a 30 kwh battery..

I guess I have heard about some people talking about measuring the amount of power it takes to charge a battery - IDK what to ask for or do with the dealer when they say the battery checks out fine.

Maybe I just get leafspy and perhaps I have a going bad cell or such, but shouldn't the dealer test show that?

derbartman
Posts: 28
Joined: Sun Jan 03, 2021 1:41 pm
Delivery Date: 03 Jan 2021
Leaf Number: 304749

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 8:08 pm

I checked at least at the city level elevation and the work city seems to be higher than the home city - so that would support the opposite of the drain we see.

I guess I might really need to do a test drive with all the variables the same and just drive some 10 mile path over and over exactly the same or something like that to see if there is some serious non-linearity.

goldbrick
Posts: 1376
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: New to me low mile 2017 with poor range?

Tue Jan 05, 2021 8:16 pm

I've noticed big changes with % SOC used on my commute which has about a 500 ft elevation change. I've also noticed changes in the SOC % when the battery is cold in the morning vs when it is warmer in the afternoon. But all those things affect the range in the way one would expect.

I think getting LeafSpyPro would be well worth the $30 to you. There is something odd about this behavior and I'm not surprised the dealer tests didn't show anything as they are usually quite worthless, at least with what they share with you. Nissan corporate may get better data via the web but I've never heard of anyone being let in on that, if it does exist.

Driver8
Posts: 53
Joined: Tue Sep 29, 2020 11:32 am
Delivery Date: 26 Sep 2020
Location: CT

Re: New to me low mile 2017 with poor range?

Wed Jan 06, 2021 7:17 am

At the bare minimum the free version of LeafSpy will give you a more accurate SOC (state of charge) of your battery as you drive. All you need to buy is the OBD2 Dongle.

Am I remembering correctly that you keep the car in an unheated garage overnight? And I'm guessing at your wife's work the car is kept outside (at 20 degrees)? Maybe that has a little to do with the difference between the two trips?

derbartman
Posts: 28
Joined: Sun Jan 03, 2021 1:41 pm
Delivery Date: 03 Jan 2021
Leaf Number: 304749

Re: New to me low mile 2017 with poor range?

Wed Jan 06, 2021 9:56 am

@ Driver8

"At the bare minimum the free version of LeafSpy will give you a more accurate SOC (state of charge) of your battery as you drive. All you need to buy is the OBD2 Dongle. "
Yes - I think I only found pro for the iPhone and I have two OBD2 dongles - would love to try the free version to check if my current dongles will work with leafspy.


"Am I remembering correctly that you keep the car in an unheated garage overnight? And I'm guessing at your wife's work the car is kept outside (at 20 degrees)? Maybe that has a little to do with the difference between the two trips?"
Ya unheated insulated garage - yes parked at work is just outside/uncovered. I think on the day in question the day was warmer maybe high 30s maybe low 40s, and the return trip outside temp was higher than the morning to work - but there was wind.

derbartman
Posts: 28
Joined: Sun Jan 03, 2021 1:41 pm
Delivery Date: 03 Jan 2021
Leaf Number: 304749

Re: New to me low mile 2017 with poor range?

Wed Jan 06, 2021 10:41 am

As I think about using leafspy and this consistent drive test - it seems like to really check the battery I would want to put it on a static load like a heater with 100% consistent load and just get stats all the way - see if anything weird happens with cells and just how much energy does it put out going from say 100 to 20 or 10..

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