Join Date: Mar 2015
Location: Pittsburgh, USA
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What specifically do you mean by "tried to charge the 12 volt battery"?
Plugging the car to a charging station or adapter with a dead 12V battery will not hurt the car - it just won't charge until the 12V battery has been separately charged so it has enough voltage to turn on the control systems.
You need to get to the 12 volt battery connected a charger - or jump it from another car. As soon as the 12 volt battery is charged a bit, turn the key and the car should "turn on" and the battery will be charged the rest of the way from the traction pack and DC-DC converter. It is just like jumping an IC engine car, starting the engine, then letting the alternator charge the battery the rest of the way.