The discussion initiated by Phil in another thread
and the data presented there prompted me to update the spreadsheet. Version three is now available on Google Docs
The revelation that Gids represented stored energy and corresponded to 80 Wh, allowed me to come up with an fairly simple model, which I used to replace the empirical data I've collected over the course of two months almost seamlessly. I feel much more confident about the data presented in the spreadsheet now, although the mapping to battery bars is still a bit iffy. I pulled up Tony's range chart as a reference, and tried to fix it, but ran out of time and had to admit defeat on that front.
The SOC column has been renamed to indicate that it's only an estimate, since we cannot reliably derive a true SOC reading from Gids or the hours on the charging time display. This estimate equates 300 Gids to 100% SOC, and it assumes that there is no additional reserve beyond the 4 Gids remaining in the battery when the car stops dead after turtle.
I've created a new column that indexes the energy available to the driver from 100% to 0. Perhaps this will be more useful than what we had previously. And finally, I've included a column with Gids. This is based purely on the assumption that each hour on the charing time display is 11 Gids. Surprisingly, this simple model, combined with the observation that there are 25 hours max on the display, delivers unexpectedly good results. It predicts 232 Gids for an 80% charge, where I typically observed 231. It also predicts the Gid value for LBW and VLBW quite accurately.
I moved the 25-hour mark down a notch to indicate that the car can enter power-restricted mode (announced by disappearing power bubbles) a bit earlier. This was driven by the model, which predicts very low energy at the 25th-hour mark. I observed this twice, most recently in January
. On another occasion, I was able to drive a mile or two beyond this mark without any trouble. In any case, the car won't go very far once you see 24 hours on the charging time display.
Your feedback and correction requests are greatly appreciated.
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