jlsoaz said:
Hi - a fellow driver and I are using my Leaf DD to take measurements so he can put his data into the PIA Survey. A question or two:
- for aH measurement, do you recommend use the "C" number ("true" aH) or use the other aH number. I think I have been using the C number.
- I never really have bothered with the SOC % reading (have just left it toggled to the GID read-out and then forgotten about other options. If the car is fully charged should the SOC % read out as 100% or near 100%? I think on the car we are reading, it is around 93 or 94% fully charged (192 or 193 GIDs.
A description of what the various readings mean is in the first post of the thread.
For battery capacity, the number you want is indeed "C" on second page of the display. It is the total capacity of the battery in Amp•hours. The Ah reading on the first page is how much of that capacity is currently filled.
The reason the car doesn't show "100%" when fully charged is because Leaf DD shows real %SOC and the LEAF doesn't allow charge higher than about 94-95% to protect the battery from overcharging; I believe that turtle is somewhere in the 1-2% range to prevent undercharging.
The %SOC display on 2013 and newer LEAFs is normalized so that full = "100%", regardless of how much charge the battery actually holds. There is some evidence that real SOC might vary with battery balancing, temperature and, perhaps, battery resistance but I don't know if that has really been pinned down yet.
Regardless, using an actual energy unit, such as Gids as you have been doing, is more useful than %SOC. I also use Gids as my fuel gauge. Knowing that LBW is at 49 Gids and VLBW is at 24 Gids is very helpful. %SOC isn't as useful because the energy content of each percent declines as the battery ages.