I am aware of what Tesla pays to Panasonic, but I was talking about whole battery pack costs - BMS, complex cooling system, fire protection and armour around cells and costs of putting it all together, you will get IMO to at least 2000USD. Bob Lutz said that all those costs in Volt are around 3500 USD -which is much simplier battery system than Tesla´s.
Plus I think it is more expensive to build rest of the car for 16.000 on BMW3 quality level.
I have high respect for Tesla technology, but I think big guys are still much better in scaling up production and bringing down the costs of parts and production process. Just look at BMW how easily, without any fuss, they doubled their prodcution of I3 within 6 months of introduction. And that is completly new concept for them.
Tesla has better car than others not because they are better in producing it, but because it has better technology. So to expect Tesla to be better in this game than big guys in timeframe of 2 years is IMO too optimistic.