Fully electric vehicles, compared to their combustion engine counterparts, are actually less complicated to build because they require fewer parts. Combustion engines, compared to electric motors and battery packs, require more practical attention. By having battery cell manufacturing in-house, automakers will be in a better position to avoid general manufacturing issues that could cause delays. Combining simpler manufacturing and eliminating third-party suppliers would also help reduce overall costs.
For the time being, Ford hasn’t made a final decision, but if both GM and Tesla are pursuing in-house battery cell production, then it would probably make business sense to follow suit.