Summary
GM has outlined an upcoming EV platform combining lithium manganese-rich batteries, revised electric drive units and a new computing architecture. The company says the changes are intended to improve range per unit of energy and simplify vehicle development and manufacturing.
General Motors has outlined an upcoming fourth-generation electric-vehicle platform that combines lithium manganese-rich (LMR) batteries, redesigned electric drive units, centralized computing and changes to vehicle development and factory assembly. GM says the integrated design is intended to improve efficiency and make future EVs simpler to build and update.
The company describes the platform as forthcoming and says it is intended for high-volume vehicle segments. Its announcement presents platform-level engineering plans and early development figures, rather than specifications for a named production model.
Designing the vehicle as one system
GM says its engineering teams are developing the platform through a more concurrent process, bringing designers, engineers and manufacturing teams together earlier instead of passing work sequentially between them. The approach uses digital models to explore many design options and assess how decisions about weight, aerodynamics, structure and components affect one another.
The company expects this process to halve a traditional five-year vehicle-development timeline. GM also says early work on the platform indicates roughly 20% more range per kilowatt-hour than its current EVs, with gains attributed to the combined effects of the batteries, drive units and aerodynamics. The figure is presented as an initial platform-level result, not as a range estimate for a specific vehicle.
Digital models will also let factory teams examine production steps, equipment placement and potential safety or ergonomic concerns before installing new hardware. During production, GM’s PlantBrAIn factory intelligence platform will combine plant-floor data with computer models to help teams adjust how vehicles and battery packs are built. GM says this approach has helped battery packs move through assembly at its facilities 30% faster. The new architecture will also let vehicles test electrical connections as they move down the assembly line, removing a final validation check after assembly.
Battery, propulsion and computing changes
The platform’s battery cells use LMR chemistry in a prismatic format. GM says the cells will be made at Spring Hill, Tennessee, by Ultium Cells, its joint venture with LG Energy Solution. The company describes the battery as the world’s first production LMR battery and says it plans to use the chemistry in its highest-volume EV segments.
Rather than physically building and testing each design, GM used computer modelling to evaluate more than 300,000 battery designs before producing a physical prototype. The company says the first LMR battery-pack concept reached formal program approval in one month. GM says LMR is designed to provide 33% more energy density than lithium iron phosphate (LFP), while supporting a smaller, lighter pack at a price comparable to LFP. Those are design aims for the chemistry, not a price or range specification for a particular vehicle.
A new family of electric motors and power electronics is intended to reduce the number of parts inside each drive unit by 40%. GM says the resulting systems are smaller and lighter, which can free space for occupants and cargo and help reduce production costs.
The platform’s computing and electrical architecture will use fewer control modules and 30% less wiring than today’s GM EVs, according to the company. GM says it provides 40 times more processing power for AI-enabled features. The architecture is intended to support future software updates, energy management, displays and voice controls, as well as continued development of features such as Super Cruise and OnStar.