Some more data to chew on. I drove the LEAF to dead again yesterday so took the oportunity to grab another log. Some interesting observations when I compare the log from two separate dead to 100% charge records.
1) Just like last time I drove to dead and charged 100%, my maximum gids increased again. Now I am up to 256 (was 244). However...
2) The average charge per gid changed from 86Wh/gid to 79Wh/gid
3) To go from 29 gids to 243 gids, I was only able to add 16.6kWh to the battery the second time compared to 17.7kWh 1.5 months ago.
4) To go from 4 to max (243 first time, 256 second time) my wall meter read
[EDIT:I remembered I failed to accound for 0.81kWh used to pre-heat that morning] .81kwH lower (21.74kWh now versus 22.60kWh before)[/EDIT]
[delete]almost exactly the same (22.60kWh vs. 22.58kWh)[/delete]
5) The charge appears to stop at a fixed voltage
So not really sure what to think. It appears my capacity [delete]didn't really change[/delete]
[edit]dropped a little[/edit] but I am seeing a change in the unit charge. Could it be the car very slowly adjusts the quantity associated with a gid and over time I will converge on 281 like everyone else?
Here is a plot of the energy stored to the battery (battery voltage * battery current * time) versus battery voltage for the range 29 to 243 (I picked this range because it was the range common to both logs). X axis is kWh, Y axis is battery voltage. Note, the reduced final charge on the battery (ch100b stops at 16.6kWh while the previous log ch100a got to 17.7kWh).
In the following plot, X axis is gids and the Y axis is battery voltage for the entire charge. Note the same ending voltage, but higher final gid (256 - was 244 before). I failed to capture the first hour of the earlier charge log (why you don't see data below 28 gids).