Quote:
Originally Posted by GaryG
David, I found a section in the workshop manual that talks about the "Jump Start Control Module Fault" on page 414-03-31 of the '05 workshop manual. One of the things that page state is "the vehicle (and the HVTB) must be at room temperature for the jump start proccedure to have optimum effect. "Under Normal Operations" it says "the jump start button is momentarily pressed, the jump start control module within the HVTB uses the low voltage battery during a 10-minute process (8-minute charge plus 2 minute rest) to step up the low voltage in an effort to charge the high voltage battery to the point where it may start the engine.
Everything I read says this is a charging process, not a heating process, and the minimum SOC must be at a minimum of 30%. If John can give me a page he is reading that states it's a heater, I'll confirm that for us.
GaryG
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John and Willard
The above is right out of the '05 FEH workshop manual page 414-03-31 which says "the vehicle (and the HVTB) must be at room temperature for the jump start proccedure to have optimum effect". We were not talking about how much power can come from the HV battery when it's hot (140F) or how high the battery can be charged cold as you both are pointing out. I don't agree or disagree because that subject is not what we are talking about. The HVTB can charge and discharge very rapidly for EV mode, but this is effected by both cold and heat. The only way to heat the battery in cold weather is to charge it, there is no HV battery "heater" provided that I have seen ref. anywhere. If you disagree, please provide us the documents like I do.
Anyone who has driven the FEH knows we get into problems charging the HVTB in too cold or too hot conditions. This is mainly with the high charging effects of "L" regen. It appears to me from the manuals in many places that the HV battery work better in the range between 77F to 100F with 82F being optimum.
GaryG