I have been reading through this thread, including the exchange about feeding the traction batteries to extend range.
Here is what I put together, please correct me as I am definitely not an expert, just using my pre-university physics.
1) if we feed the traction batteries around the heater connection with 80% of max charge, we should be ok and not cause any issue with BMS.
2) for my 80 cell 14.5KW battery, I calculated roughly 300 V full voltage, therefore the 80% would be roughly 250v DC...
3) what happens if I feed the heater with five 48V 40Ah batteries in parallel ?
If my math is accurate, each battery pack would deliver nearly 2kw, then that would add to the car another ~10KW ?
To be switched in when the batteries drop below 250 V ?
That would of course make a real mess in the boot
and demand separate chargers. But seems to be a workable solution.
Make sense ?