I'm surprised with all this talk about EV tech, frankly it is not that hard, evidenced by people doing conversion's in their garage.

Take a bunch of battery cells, assemble them in a pack with a management system, get an electric motor, (plus little ones for the likes of air conditioning), a bunch of power electronics, and wire them all together.

Basically the same stuff that you would find in a brush-less drill for a few hundred dolars at a hardware store, but bigger.

Much of the stuff can be purchased from OEM's if automakers don't want to do it themselves. Generally the battery cells are made by (or in a joint effort) with companies that are specialist in that area in that like LG. Other bits can be purchased from OEM's like Bosch if the automaker doesn't want to do it in-house.

The reall challenge for automakers with EV's are:

• Supply - getting their hands on enough bits (especially battery cells) to meet customer demand.
• Getting it profitable - Batteries are expensive... Consumers demand lots of them for long range.