danrjones
Posts: 1384
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: Looking to buy a 2nd Leaf - How Old Should We Go?

Falcon73 wrote: Sat May 21, 2022 12:35 pm No, but probably just below 80.5%
Ok, well if that's the case, then I have a ways yet to go before loosing the first battery bar.

Speaking of HX, I always thought a lower resistance was better - but your vehicle seems to show a low HX being a symptom of a bad or degraded battery (assuming your low HX is connected to the degradation)
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19
lorenfb
Posts: 2598
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Looking to buy a 2nd Leaf - How Old Should We Go?

danrjones wrote: Mon May 23, 2022 8:33 am
Falcon73 wrote: Sat May 21, 2022 12:35 pm No, but probably just below 80.5%
Ok, well if that's the case, then I have a ways yet to go before loosing the first battery bar.

Speaking of HX, I always thought a lower resistance was better - but your vehicle seems to show a low HX being a symptom of a bad or degraded battery (assuming your low HX is connected to the degradation)
Why do you think Gen 2 Hx is a resistance value? Based on the Gen 1 data, Hx data infer a battery conductance,
i.e. extensive Gen 1 sample data indicate such. What's being called Hx for Gen 2 vehicles may represent a parameter
unrelated to either resistance or conductance.
#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: 28K miles, SOH 105Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F
danrjones
Posts: 1384
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: Looking to buy a 2nd Leaf - How Old Should We Go?

Previous discussions somewhere on here, and that was speculation, as 2018 HX appeared to behave very differently than it did for the older models. Last I had read nobody seemed to REALLY know what HX actually was for 2018's and beyond.

My HX has always jumped up after fast charging (which I haven't done much of) so it "seemed" like that could be connected, as in, a jump up being a negative impact of the fast charging. Overall my HX is fairly low though, right now around 95.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19
lorenfb
Posts: 2598
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Looking to buy a 2nd Leaf - How Old Should We Go?

danrjones wrote: Mon May 23, 2022 11:09 am Previous discussions somewhere on here, and that was speculation, as 2018 HX appeared to behave very differently than it did for the older models. Last I had read nobody seemed to REALLY know what HX actually was for 2018's and beyond.

My HX has always jumped up after fast charging (which I haven't done much of) so it "seemed" like that could be connected, as in, a jump up being a negative impact of the fast charging. Overall my HX is fairly low though, right now around 95.
Correct. Only with more longitudinal data, e.g. correlation with SOH/Ahr, can one possibly explain what Hx might represent.
#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: 28K miles, SOH 105Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

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