Quote:
Originally Posted by badpelican
I understand that activating the button in the footwell of the FEH uses the 12v battery to warm the HV battery, thereby increasing its ability to provide power. Since the optimal battery temp is 82 F and having the ability of the HV battery to accept as well as deliver power is an important factor in optimal hybrid performance would there be any advantage to using this function routinely during cold weather operations?
Thanks,
DavidH
And greetings from the burbs of Seattle!
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Hi David,
Good question, but I don't think the jump start feature would work that well if the battery was not low enough to accept the charge as it would with a low enough battery that could not start the FEH/MMH ICE. Also, a cold battery does not accept charging that well anyway. After starting and dumping the 12V battery, the high DC to low DC converter would need to replace that 12V battery energy quickly from the generators and HV battery.
At any rate, if you leave your HV battery low when parked, the small generator will still heat up the battery during warm-up of the ICE. If my temp here is in the low 50F, the battery will not accept regen in addition to the small generator anyway, till things warm up.
Bottom line, I would not even try it unless I had a HV battery that would not start the FEH/MMH and had no choice.
GaryG