GerryAZ wrote: ↑
Sat Oct 12, 2019 7:32 am
I carefully ran my new car completely dead to get a baseline on actual range and battery storage capacity. I posted results in the thread !inked above. The SL+ was different than my previous LEAFs in that the Low Battery Warning came in with much more energy left and there was no audible or visual Very Low Battery Warning. The distance to empty (DTE or GOM) did change to flashing numbers at LBW and then to flashing --- a little later (i consider that VLBW even though there was no other audible or visual warning).
That was an informative post -- thanks.
Is your LeafSpy set at the default Wh/Gid ?
This forum has a fantastic thread called "What is a Gid" started back in 2012 that has an excellent discussion about measuring usable battery capacity and associated pitfalls.
One important message is to not trust the SoC or Gid values at the bottom of the battery, anecdotes notwithstanding.
Choice quotes from Phil, aka Engineer the LEAF hacker extra-ordinaire (now in Tesla land) and Gary Giddings of Gid reknown:
The Battery ECU computes SOC and Watt-hours remaining by 2 methods; One is by coulomb counting with a hall-effect ammeter, and the other is by watching open-circuit voltage of the pack and performing a complex calculation based on multiple inputs. Because the coulomb counting method has some drift due to the hall-effect system, Periodically the battery ECU will dynamically adjust these figures to keep them accurate. This is why the apparent charge drops a little faster initially sometimes.
Scaling these "Gids" by 80 (or 100/281) does not change the base data, which still gets "used up" faster at the top end, and occasionally appears to be "not really available" at the low end.
You can scale 281 (by 80) to 22480 Wh (or by 0.08 to get 22.5 kWh) if you find it helpful, however the top "kWh" will still disappear faster, and the bottom couple of "kWh" might occasionally be just "wishful thinking".
So, however you like it scaled, please use this "Gid" value ... cautiously.