Battery died, purchased a new one and now car won't idle

Sounds like an alternator to me to check it start the car and then remove one of the battery terminals if the engine shuts down when you do this it's about 95% sure it's the alternator

I have this same problem and it's NOT the alternator, did you finally find out what the problem is? I was told it's the ECU that takes some time to read all the sensors and takes some time but it's been three days now and still the same thing.