When General Motors unveiled its Ultium battery cells in March of 2020, the presentation left little doubt that the U.S. auto giant was determined to roll out a compelling lineup of electric vehicles in record time. Developed in partnership with LG Energy Solution, the revolutionary cells were the fundamental building blocks of two Ultium-based skateboard platforms that could support a wide variety of EV models. Unibody passenger cars and crossover SUVs would ride on GM’s new BEV3 architecture...