mitch672 said:
The "battery pack heater" uses battery power to generate the heat! except when connected to the J-1772 EVSE... the heat/AC in the vehicle uses battery power. You get stuck in one of our typical traffic jams or one of our famous 3-4 hour winter commutes, you're going to have to shutoff the heat, to have any chance of making it. What I am saying is, even though an EV could work here, drivers will have to make a lot of compromises, and many are not willing to - yet. $4,$5, or $6 gasoline, maybe more will, but larger packs would also help
With respect, Mitch, battery pack heaters are not new tech. Throw some 1/4 inch insulation around the battery box and line the bottom with
these thin electric blankets and we're done.
The pack doesn't need the heater when driving - the heater will be used to keep the pack somewhat warm when the car's sitting and plugged in.
LiFePO4 can be charged when the cell core temperature is 0°C/32°F, and can be discharged down to minus 20°C -- and LiMn2O4 is better in the cold.
In the days before synthetic engine oil, we'd prepare for an Upper Peninsula winter by getting a cheap charcoal grill and breaking off the legs - it was easier to slide under the oil pan once we got the fire lit.