Quote:
Originally Posted by retepsnikrep
I have also acquired 100 x 48v to 5v dc-dc converters which could drive the battery fan at 5v for silent cooling (it works down to 3.5v I tested it) and or the led meter as well.
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I've run a Molex-ended pack and fan tap for once the power supplies arrive, and run a second from that to the console so I can check voltages as I drive if I wish (the cupholders are perfect for VOMs). The fan seems to start out at about 3 - 3.5V, then go to about 7V and then about 13V as it warms up will full assist up a long hill etc. (At full fan voltage I put a hand back to the vent a couple times and felt essentially nothing; having a fan rated for 0.6A at 12V seems a bit weak for keeping the pack cool at ~14kW out/~7kW in IMHO.)
A full SOC (meaning full minus 1 bar) roughly corresponds to 158V, gradually dipping down to around 128 under sustained full assist. I saw 175V or so under mostly sustained regen; 180V from sustained full regen would seemingly be likely.
I also noticed the more powerful blower for the DC-DC and invertor appears to get its air from one frame rail, and deposit in the other. Makes sense actually. Didn't see anything resembling a filter housing though so I suspect dust/grime buildup on the heat exchangers over time is likely.
Regards,
Roger
