DougWantsALeaf wrote: ↑
Tue Jan 14, 2020 4:28 pm
Ideally the fan would be with thermometer and actuator to either route air to or from cabin or outside depending on what you need. Cold battery and warm cabin, take cabin air. Battery at 120F, pull in outside air. Battery at 70F and outside at 0F, no fan....etc.
Actually I have wondered if a small airscoop on the bottom of the car to pull air over the battery (with actuator to close in winter) would effectively solve the small remaining hot battery long long trip issue.
Yeah that would be the ultimate. Simply a system that has two outlets. One to the atmosphere, the other back into the car. Adjustable Thermostat control. Turn on when batt temps hit 90º... It would be an interesting contest in Summer between A/C and battery (A/C will have ambient solar to fight as well) Not sure Summer will improve a ton.
Winter would be a different story. Keeping pack cool and warming passengers would be great. We have had cold weather and even with defrost on 61º (one degree up from lowest) and fan speed of one, its still rather warm. Since set point is so low compared to cabin temp, the low fan seems to have an effect of just warming the front of car only.
Power output is still high for a time so not sure if its more efficient or not?
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 15, 235.1mi, 93.12% SOH
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