Submitted by krdmsn on 24. Oktober 2018
because HV Bat. is at or almost 0 ( zero ) V's car will not charge off a AC charger.. I held when this happen one needs to charge it with DC Voltage at very current..i guessing it be in mA of charge current ?? is there any problem by doing this ?? do want to take to tesla shop in south bay. have charged other Li-ion Bat. this way ..Have High Voltage , low current power supply , less 2.5 amp and can limit current down to less then 250 mA ( 1/4 amp ) or less if need be ..I know it may take several day at this low current to get battery up to the minium charging voltage , which think is around 2.5 V per cell ,,, 247 Volt for total pack voltage.. w
well BMS allow me to do this with doing any thing ??? do need to over ride some in BMS ??? does tasla have a shop maintance maunual for roadster ??