SageBrush
Posts: 4907
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 4:06 pm

Weasel wording aside, the verbiage that the throttling only kicks in with repeat QC stops is I suspect going to turn out to not be true on hot summer days (> 90F)
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

LeftieBiker
Moderator
Posts: 14863
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 4:07 pm

If Hx is the average value of the battery resistance (mohms) over time and NOT the present value for the battery resistance,
(battery resistance changes with temp and over time), then Hx could possibly represent the average battery resistance
over time.
It's always been my guess that Hx represents the resistance (inverse resistance, more accurately) at the moment the reading is taken, while SOH is an average of Hx over time. If you take "H" to mean "Health" then this makes sense.
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.

DaveinOlyWA
Posts: 14806
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 5:00 pm

SageBrush wrote:Weasel wording aside, the verbiage that the throttling only kicks in with repeat QC stops is I suspect going to turn out to not be true on hot summer days (> 90F)
A LEAFer in AZ ha throttling issues on first QC but her situation is uniq... ah, hopeless.

She lives in apt, has charging in uncovered parking lot. Charge finishes in afternoon and she leaves early evening. Dk if this her normal daily routine but she was getting 22 kw on first QC of the day. Its only March... or April if you will. She has no chance of being happy...
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; 10,081 mi, 95.03% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

lorenfb
Posts: 2426
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 7:55 pm

LeftieBiker wrote:
If Hx is the average value of the battery resistance (mohms) over time and NOT the present value for the battery resistance,
(battery resistance changes with temp and over time), then Hx could possibly represent the average battery resistance
over time.
It's always been my guess that Hx represents the resistance (inverse resistance, more accurately) at the moment the reading is taken, while SOH is an average of Hx over time. If you take "H" to mean "Health" then this makes sense.
As I understand you, you're saying Hx is the present state of health of the battery versus SOH which is its average over time, right?
If so, it's not resistance nor its inverse (conductance), right? I think Gary (Gid) assigned the names and meanings when the Leaf BMS
was analyzed. If we agree, let's move on.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

LeftieBiker
Moderator
Posts: 14863
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 8:46 pm

I think that whatever Hx is, it's a momentary reading, while SOH is a longer term average. It appears that, barring a BMS reset, these two LeafSpy readings may allow a valid comparison of degradation between the 24, 30 and 40kwh packs.
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.

DaveinOlyWA
Posts: 14806
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 9:35 pm

LeftieBiker wrote:I think that whatever Hx is, it's a momentary reading, while SOH is a longer term average. It appears that, barring a BMS reset, these two LeafSpy readings may allow a valid comparison of degradation between the 24, 30 and 40kwh packs.
This is plausible. Hx changes frequently thru out the day. SOH? Not so much.
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; 10,081 mi, 95.03% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

lorenfb
Posts: 2426
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Mon Apr 02, 2018 11:23 pm

Making progress!
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

User avatar
OrientExpress
Posts: 1554
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Tue Apr 03, 2018 8:07 am

I've got an '18 LEAF SL this week, and tried some quick charges with it yesterday, here is the second QC I did which ran for 35 minutes. It did not seem any different from how my 2014 charges at this QC.

Image

Image

Image

Image

Image

Image

Image

On Thursday we will be driving it from Monterey to South Lake Tahoe and back. That will be the real test I think.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

Becky50
Gold Member
Posts: 166
Joined: Mon Apr 02, 2012 9:42 pm
Delivery Date: 02 Aug 2012
Leaf Number: 019032
Location: San Jose, CA

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Tue Apr 03, 2018 9:01 am

I live in San Jose and will be looking forward to your report on the trip/adventure.

lorenfb
Posts: 2426
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Possible Widespread 2018 Traction Battery Quick Charge Problems

Tue Apr 03, 2018 9:11 am

DaveinOlyWA wrote:
LeftieBiker wrote:I think that whatever Hx is, it's a momentary reading, while SOH is a longer term average. It appears that, barring a BMS reset, these two LeafSpy readings may allow a valid comparison of degradation between the 24, 30 and 40kwh packs.
This is plausible. Hx changes frequently thru out the day. SOH? Not so much.
This graphic in the TM-Spy would be helpful in the LeafSpy for a comparative analysis of the 24/30/40 kWh batteries.

http://mynissanleaf.com/viewtopic.php?f ... 47#p523547
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

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