The 62kWh Battery Topic

[Learjet]

Didn't know how to attach an image, but I did at trickle charge to full charge today (from 95% earlier charge) prior to some incoming snow, and since there were questions concerning what the Leaf charge circuit was doing in the last 5%. I monitor my household power with a Brultech GEM and Dashbox, so I just watched the power input to the trickle charger. Basically I saw an avg of 1450 watts to the charger for about two hours, then tapered down to about 600 watts during the next half hour. The charge circuit then waited about 5 minutes then delivered 3 more 15 minutes charges at around 600 watts. With around 5 min wait between these last 3. Your results may vary but that was with my 2022 SV+.
I still have questions about how frequently my 12v is charged, but I think in the next week or so, I'll attach a voltage data logger to the 12v and leave it attached for a week or so. Should give me a good general idea of how the Leaf is handling the 12v. I'll post afterwards...

you should see the 12 volt battery charged:

When charging the traction battery

every 24 hours of non-use the car charges the 12volt for 5 min....not plugged in....not sure what it does plugged in.

normal charge starts at ~14.1-14.6 volts...temp compensated...then drops to float charge of ~13.1 volts...also temp compensated.

Turn the windshield wipers on will change the charge voltage to ~14.1-14.6 as long as the wipers are on.

Unplug the sense wire on the battery current sensor...will charge at 14.1-14.6 volts...but generate a DTC code.

(edit voltage range)

[LeftieBiker]

Turn the windshield wipers on will change the charge voltage to 14.1 as long as the wipers are on.

Turning the windshield wipers on will raise the system voltage to 14.1 - 14.6 volts, for about one minute.

[Learjet]

Turn the windshield wipers on will change the charge voltage to 14.1 as long as the wipers are on.

Turning the windshield wipers on will raise the system voltage to 14.1 - 14.6 volts, for about one minute.

I agree on the voltage range...but my car stays at that voltage as long as the wipers are on....observed on my plug in USB/Voltage meter....many many times.

[LeftieBiker]

I wasn't clear about that: if you blip the windshield wipers once, the voltage will stay at 14.X volts for about a minute after that - and for about a minute after shutting them off, regardless.

[Learjet]

I wasn't clear about that: if you blip the windshield wipers once, the voltage will stay at 14.X volts for about a minute after that - and for about a minute after shutting them off, regardless.

yes, I agree with that statement...but while in the intermittent mode, Low or High...the voltage stays in the ~14.1-14.6 range

[LeftieBiker]

Yes. If I actually need the wipers, I use intermittent mode with the longest delay. If I don't need them, I blip them once, once or twice on a short trip.

[DougWantsALeaf]

Do you think there is a way to emulate this "trick" to improve the battery SoH? Floor it away from the charging station? Is that what they mean by a discharge even at the end of charging?

https://www.autoevolution.com/news/li-i ... TltkldYsYM

[LeftieBiker]

That appears to be what they mean. It is not clear, however, that they have actually tried to do this - to prove the hypothesis. Their description of the process by which lithium batteries degrade sounds a bit...simplistic. This may just be journalistic 'explain-ese' or it may be something less benign.

[DougWantsALeaf]

My S+ has not lost a hundredth now in over a month in the small daily adjustments. I guess it's a benefit of the cold. (SV+ has lost 3 hundredths in the same time period). Let's hope we are at the flat part of the curve on the batteries as we approach 3 years. The SV+ was charged above 90% a couple times in that period.

[Marktm]

Do you think there is a way to emulate this "trick" to improve the battery SoH? Floor it away from the charging station? Is that what they mean by a discharge even at the end of charging?

https://www.autoevolution.com/news/li-i ... TltkldYsYM

Seems a bit antithetical - especially after a "quick charge" when the battery is already heated up - then apply a very high discharge current?? Maybe more applicable to "home" charge controllers - with the side benefit of requiring a V2H capability that turns on (e.g.) the water heater - OK, dream on!