What are some good companies to look at that are players in the EV space?

I'm confident electric vehicles are going to be the mainstream vehicles in the next decade or two, and i was wondering what companies are looking to make big plays in the EV space, whether they are car producers or part manufacturers. I know every major car brand is developing their own electric cars, but are there some potentially undervalued companies that might have an explosion once electric vehicles become mainstream? I'm interested in any companies that have something to do with electric vehicles.