Stellantis N.V. and Factorial Energy have successfully validated automotive-sized solid-state battery cells, achieving an energy density of 375Wh/kg. This development marks a significant advancement toward the commercial deployment of solid-state batteries in electric vehicles (EVs). The breakthrough FEST® (Factorial Electrolyte System Technology) enables rapid charging, allowing the battery to charge from 15% to 90% in approximately 18 minutes.
The validated battery cells demonstrate operational stability across a temperature range of -30°C to 45°C (-22°F to 113°F) and exhibit high power capabilities with discharge rates reaching up to 4C. Stellantis has announced plans to incorporate Factorial’s solid-state batteries into a demonstration fleet by 2026, highlighting the practical application of this technology in real-world driving conditions.
The partnership between Stellantis and Factorial extends beyond battery cell development, encompassing the optimization of battery pack architecture, vehicle integration, and enhancements in range and cost efficiency. This collaboration aims to advance battery technology, contributing to the evolution of more efficient and affordable EV solutions.
“Reaching this level of performance reflects the strengths of our collaboration with Factorial,” said Ned Curic, Stellantis Chief Engineering and Technology Officer. “This breakthrough puts us at the forefront of the solid-state revolution, but we are not stopping there. We continue working together to push the boundaries and deliver even more advanced solutions, bringing us closer to lighter, more efficient batteries that reduce costs for our customers.”
Factorial Energy’s FEST® cells, unlike conventional lithium-ion batteries, offer higher energy density and faster charging capabilities. The cells have demonstrated over 600 cycles, progressing towards automotive qualification—a key milestone for large-format lithium-metal solid-state batteries. Additionally, Factorial’s scientific engineering and AI-driven tools have facilitated the development of an electrolyte formulation that enhances performance across various climates.
“Battery development is about compromise. While optimizing one feature is simple, balancing high energy density, cycle life, fast charging, and safety in an automotive-sized battery with OEM validation is a breakthrough,” said Siyu Huang, CEO of Factorial Energy. “This achievement with Stellantis is bringing next-generation battery technology from research to reality.”
The collaboration builds on Stellantis’ $75 million investment in Factorial Energy in 2021, strengthening their strategic partnership. The successful validation of FEST® technology marks a critical step toward commercializing solid-state batteries, with the demonstration fleet set to further validate performance and integration in the coming years.
Source: Stellantis Press Release
