eyemgh
Posts: 33
Joined: Thu Oct 26, 2017 1:32 am
Delivery Date: 26 Oct 2017
Location: Ashland, OR

Best and Worst Case

Fri Oct 27, 2017 10:50 pm

I there a way to know best and worst case scenarios based on a good history and number of bars without Leaf Spy data?

Specifically, I found a '14 SL, original owner, mild climate, daily commuter, with 40,000 miles, but under 10 QCs and still with 12, I believe legitimate, bars. The guess-o-meter says 87 miles on full charge. I trust the seller. The car has a perfect record and was just given a clean bill of health, but of course with limited hard data, by Nissan today. It's 6 hours from me so I can't Leaf Spy it.

Given the miles, assuming no hanky panky with resetting the computer, is it possible to extrapolate best and worst case SoH, AHr and Hx from the history?

eyemgh
Posts: 33
Joined: Thu Oct 26, 2017 1:32 am
Delivery Date: 26 Oct 2017
Location: Ashland, OR

Re: Best and Worst Case

Sat Oct 28, 2017 11:45 am

Bueller? Bueller? Bueller? :D

Any thoughts?

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Nubo
Posts: 4512
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Best and Worst Case

Sat Oct 28, 2017 12:21 pm

eyemgh wrote: ...Given the miles, assuming no hanky panky with resetting the computer...


I wouldn't grant that assumption. But if you do... The GOM is not useful for the kind of estimate you're looking for. If it truly is a 12-bar with 40K miles, then we could reasonably speculate that it is likely on the cusp of losing the first bar. Use the range chart(s) and plan for 11-bar performance. If you want better estimate you'll need LeafSpy readings, imho.
I noticed you're still working with polymers.

alozzy
Posts: 716
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Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Best and Worst Case

Sat Oct 28, 2017 12:31 pm

You should also verify what LeafSpy is telling you, as unscrupulous dealers can reset the BMS. An SOH of 95% or higher on an 2013/2014 is highly unlikely to be legit.

To do that, you need to do an extended driving test, using at least 25% pack charge, to verify the expected range. Lots of existing posts on how to do that...
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

BuckMkII
Posts: 169
Joined: Sat May 06, 2017 8:04 am
Location: Seattle

Re: Best and Worst Case

Sat Oct 28, 2017 1:10 pm

Is anyone other than a Nissan dealer able to do a BMS reset? Remind me what the "legitimate" reasons for doing the reset are.

I would have thought that with a private seller who is the original owner, that would be pretty low on the list of concerns.

OP, has the seller described their use of the car in detail to you? I.e., do they mostly charge at home or at work? What town do they live in?
2013 SV no QC, manufactured July 2013
car grew up in San Jose CA, purchased 5/31/17 in Seattle
on 6/16/17: AHr = 56.4; SOH = 86%; Hx = 84.3; ODO = 39,250
on 9/29/17: AHr = 55.3; SOH = 84%; Hx = 81.6; ODO = 41,492
bar 12 lost 8/21/17

cwerdna
Gold Member
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Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Best and Worst Case

Sat Oct 28, 2017 1:31 pm

BuckMkII wrote:Is anyone other than a Nissan dealer able to do a BMS reset?

Yes. See posts by AntronX in this thread, besides these posts:
viewtopic.php?p=489739#p489739
viewtopic.php?f=30&t=23714&p=489818&hilit=reset#p489818
viewtopic.php?p=489868#p489868

viewtopic.php?p=489807#p489807 before and after BMS reset.
BuckMkII wrote:Remind me what the "legitimate" reasons for doing the reset are.

The only one is when the battery pack is changed.

I wonder who did the reset of the car mentioned at http://daveinolywa.blogspot.com/2014/11 ... -read.html and with what.

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

eyemgh
Posts: 33
Joined: Thu Oct 26, 2017 1:32 am
Delivery Date: 26 Oct 2017
Location: Ashland, OR

Re: Best and Worst Case

Sat Oct 28, 2017 1:58 pm

It’s been charged almost exclusively at home on L2. It has had less than 10 DCQCs. It has 43,000 miles and is still at 12 bars. I’m vetting it as though it’s full 11 bars. Given where it lives, its ownership history, how it has been used and communicating with the owner, I believe it’s very possible to still have 12 bars, very likely just though.

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Nubo
Posts: 4512
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Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Best and Worst Case

Sat Oct 28, 2017 5:35 pm

cwerdna wrote:
BuckMkII wrote:Is anyone other than a Nissan dealer able to do a BMS reset?

Yes. See posts by AntronX in this thread, besides these posts:
viewtopic.php?p=489739#p489739
viewtopic.php?f=30&t=23714&p=489818&hilit=reset#p489818
viewtopic.php?p=489868#p489868

viewtopic.php?p=489807#p489807 before and after BMS reset.
BuckMkII wrote:Remind me what the "legitimate" reasons for doing the reset are.

The only one is when the battery pack is changed.

I wonder who did the reset of the car mentioned at http://daveinolywa.blogspot.com/2014/11 ... -read.html and with what.


Thanks, I hadn't run across that before. So even LeafSpy can't catch the shenanigans.
I noticed you're still working with polymers.

alozzy
Posts: 716
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Best and Worst Case

Sat Oct 28, 2017 10:03 pm

Yup, which is why I always tell people the only real peace of mind comes from doing an extended driving test - reset trip counter, drive until SOC drops 25%, multiply trip miles by 4 to estimate full range. If the LeafSpy data doesn't jive with the estimated range (based on the empirical data), then walk away from the deal.
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

DaveinOlyWA
Posts: 12336
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Best and Worst Case

Sun Oct 29, 2017 8:36 am

Not with the info you have. The GOM without miles per kwh is all but useless. and the MPK has to be reset every time the car is recharged. If its an SV, I think it has a history accessible from the center console (my 2011 SL had it anyway...) that would give you a somewhat better pix

but keep in mind a new pack can display 125 miles on the GOM at full charge quite easily so 87 is not very good.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 (build 10/2016)"low water marks" 27,000 miles.363GID Ahr 79.13Hx95.17%kwh28.1QCs238,L2's 251
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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