Danger Will Robinson
Making batteries is a little more complicated than cars - and a lot less well understood.
A lot of entrenched makers of Lithium batteries are entrenched makers because their product works, you change anything and it stops working, or occasionally burns your new Boeing to the ground.
It's a lot like building a chip fab, it looks like it's all engineering but there is a lot of black magic - it works if we do this but we don't exactly know why.