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Unfortunately, V10 hasn't helped this issue....
View attachment 461130
So armed with ScanMyTesla and OBDII/CANBUS data I really don't know much more! It's still happening and I don't see things like I'd expect (like cell voltage dropping). Here's the only things I've got which shows cell temp dropping:
View attachment 498407
The other params you suggest are very very steady during this time (to my surprise). It's an hour of data with over 800K rows of data, so not easy to work with....but I can plot anything (including boring plots like the cell imbalance which is basically ~4.0 mV over the entire hour. My SMT imbalance data appears to be pretty coarse- it appears to be 2.0mV of resolution. I will plot it for completeness and share.Cool. You should plot the cell imbalance, pack voltage, and other cell parameters (max and min cell voltages) like that to see whether anything correlates. It doesn't really appear to be temperature related and it's not like this is a very significant temperature shift anyway.
It's an hour of data with over 800K rows of data, so not easy to work with
So armed with ScanMyTesla and OBDII/CANBUS data I really don't know much more! It's still happening and I don't see things like I'd expect (like cell voltage dropping). Here's the only things I've got which shows cell temp dropping:
View attachment 498407
Here's imbalance vs SOC:Cool. You should plot the cell imbalance, pack voltage, and other cell parameters (max and min cell voltages) like that to see whether anything correlates. It doesn't really appear to be temperature related and it's not like this is a very significant temperature shift anyway.
I guess you should check the size of the buffer and nominal remaining and see what they are doing. Those would both affect SoC but not change full capacity.
Is the current draw from either the 12V or large battery changing
Specifically, should it be possible for the GUI displayed SOC to change by 15 or 16 miles while the nominal full pack value holds the same? I was thinking about this and thought that SOC was just a constant X nominal full pack, no? I'm still trying to make sense out of my post-commute phenomena here....
SOC was just a constant X nominal full pack,
Yes, your replies have resulted in me thinking about this properly again (I think). For my unusual range loss phenomena, my nominal full energy is staying constant, but my remaining energy is what is decaying after my commute in and then growing back after my commute home. What's interesting is that when I plug my car in upon arriving at home, while I can verify no energy is being supplied from the wall (because I have CT taps on my EVSE), the API data shows the energy growth as "charging" under the energy_added attribute. So, it looks like crazy high vampire loss at work (15-16 mi per hour) and then magical charging from heaven at home (even faster!). Still mentally struggling to understand since the voltage imbalance reports things are balanced at around 4mV upon arriving at both work and home. I rarely see full recoup but close (lose 15-16 and gain 11-14), but getting most back makes me a little less hyper that my car is broke, but as an engineer this behavior is irritating me!Since Buffer kWh is 4.5 % of nominal full kWh, this can also be expressed as:
SoC % = (RemainingkWh - 0.045*NominalFullkWh) / (0.955*NominalFullkWh)
By the way, even if you modify this statement to " SoC just a constant x nominal remaining energy," it is still not a true statement. That is why the SoC and rated miles are not equivalent and not interchangeable. The SoC depends on both the remaining energy and the full energy, while the rated miles depend only on remaining energy.
I rarely see full recoup but close (lose 15-16 and gain 11-14), but getting most back makes me a little less hyper that my car is broke, but as an engineer this behavior is irritating me!