Stellantis and Factorial Energy have achieved a significant milestone in developing solid-state batteries by successfully validating automotive-sized FEST solid-state battery cells with an energy density of 375 watt-hours per kilogram (Wh/kg). This progress marks an important step toward the commercial use of next-generation electric vehicle batteries.
The breakthrough FEST technology enables fast charging from 15% to 90% in just 18 minutes and demonstrates the ability to operate at temperatures ranging from -30°C to 45°C, with high power capabilities up to a 4C discharge rate.
Stellantis plans to incorporate Factorial's solid-state batteries into a demonstration fleet by 2026. The collaboration between the two companies goes beyond cell development, focusing on optimizing battery pack architecture and enhancing vehicle integration to improve range and cost efficiency.
Stellantis Chief Engineering and Technology Officer Ned Curic emphasized the impact of this advancement on the solid-state battery revolution and the continued efforts to deliver more advanced solutions for better efficiency and reduced costs for customers.
The validated 77-ampere-hours (Ah) FEST cells offer higher energy density and faster charging compared to conventional lithium-ion batteries. These cells signify a milestone in large-format, lithium-metal solid-state battery automotive qualification. Developed using scientific engineering and AI-driven tools, the latest electrolyte formulation supports battery performance across various climates, surpassing previous solid-state limitations.
Factorial Energy CEO Siyu Huang highlighted the breakthrough in balancing high-energy density, cycle life, fast charging and safety in an automotive-sized battery with original equipment manufacturer validation. The collaboration between Stellantis and Factorial aims to optimize battery pack design for better weight savings and system efficiency, contributing to sustainable and affordable EV solutions. This advancement builds on Stellantis' $75 million investment in Factorial Energy in 2021, reinforcing their strategic partnership.
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