Is GM’s Ultium really all that “advanced” as compared to Ford, Rivian, Geely, Volvo, Porche, Audi, Kia, Tesla.
Just some examples … Tesla is out, their architecture is designed for production, not R&D design. Look at their motor design which uses magnet wire. GM wrote papers on the ideal EV motor wiring which is bars back in the 90’s after the EV1. You want high current and low losses, the downside to bars is they take tricky machinery to manufacture, which Tesla didn’t want to mess with for quick production startup. The battery design is again for production, not good R&D. Remember when Steve Jobs went from cylindrical to pouch? Every other EV OED does pouches, except Tesla and Lucid (startup from Tesla early employees).
Ford doesn’t have an architecture, but a design derived from the Focus EV which was the worst EV in the industry (compliance). They’re designing their first architecture now due to their ‘iPhone moment’ when they realized that hey, EV’s are a thing (Jim Farley’s words)
The Europeans have a mish-mash of designs, the best is VW MEB, while there’s few details I don’t see anything other than a specification. Their software is an absolute mess, as an engineer I can guarantee its a Ball of Mud. They’re trying to work with a Chinese EV OEM to fix it but it won’t happen, best to start over (been there, done that).
Keeping the post short so will mention just one Ultium feature - wireless per module BMS. Nobody AFAIK has anything close. This will allow them and customers to mix/match chemistries and modules. Have a poor module? Swap it out. Want to upgrade your battery? Upgrade as much or little as you want. These features may or may not be offered, but the architecture enables it (nobody else has a per module BMS).
I could go into depth on Ultifi and the specific features (Linux plugin based inversion of control decoupling, and what that means for customers) but you get the idea.