Factorial Energy and Stellantis Begin North American Testing of FEST Solid-State Battery, Accelerating EV Commercialization

Electrek USA

Overview

Factorial Energy announced the start of North American testing for its FEST all-solid-state battery cells in partnership with Stellantis. These 77Ah FEST cells, integrated into Stellantis’ STLA Large platform, are powering the Dodge Charger Daytona prototype. The cells achieved an energy density of 375 Wh/kg over 600 cycles, maintained performance across extreme temperatures from -30°C to 45°C, and demonstrated ultra-fast charging from 15% to 90% in just 18 minutes. This marks a significant milestone towards all-solid-state battery commercialization in EVs.

In Depth

Key Findings

Factorial Energy has announced the commencement of North American testing for its FEST (Factorial Electrolyte System Technology) all-solid-state battery cells, through a strategic partnership with automotive giant Stellantis. This advanced technology has been integrated into Stellantis’ next-generation EV platform, STLA Large, and is actively powering the Dodge Charger Daytona prototype. Notably, Factorial’s 77Ah FEST cells have achieved an impressive energy density of 375 Wh/kg maintained over 600 cycles. Beyond this, they demonstrate stable operation across an extreme temperature range from -30°C to 45°C and achieve ultra-fast charging from 15% to 90% in a mere 18 minutes, establishing a critical milestone for the practical implementation of all-solid-state batteries in electric vehicles.

Technical / Clinical Details

Factorial’s FEST technology aims to overcome the safety, energy density, and charging speed limitations of existing liquid-electrolyte lithium-ion batteries by employing a solid electrolyte alongside proprietary electrode materials. The tested 77Ah FEST cells have unequivocally demonstrated their superior performance. The 375 Wh/kg energy density suggests a significant potential for extending EV driving ranges. Achieving high capacity retention over 600 cycles indicates robust long-term reliability and durability. Most impressively, the ability to maintain stable performance across a wide temperature spectrum, from frigid -30°C to scorching 45°C, is paramount for enabling EV operation in diverse geographical regions. Furthermore, the ultra-fast charging capability—allowing a 15% to 90% charge in just 18 minutes—elevates EV convenience to a level comparable with gasoline vehicles, dramatically reducing waiting times at charging stations. These metrics clearly demonstrate that all-solid-state battery technology is progressing beyond laboratory-scale achievements to reach a deployable level in real-world vehicles.

Background & Context

While the electric vehicle (EV) market is experiencing rapid growth, key consumer concerns remain range anxiety, lengthy charging times, and battery safety. All-solid-state batteries are anticipated as the ‘holy grail’ solution to these challenges, spurring intense global competition among automakers and battery developers. The partnership between Factorial Energy and Stellantis represents a powerful strategic move, combining an emerging battery technology firm with a traditional automotive manufacturer to accelerate development from research to real-vehicle integration and, ultimately, mass production. The integration of FEST cells into the Dodge Charger Daytona prototype signifies that all-solid-state battery technology is indeed beginning to shape the future of the automotive industry.

Strategic Significance & Outlook

The success of Factorial Energy’s FEST cells strongly reinforces the potential for all-solid-state batteries to profoundly transform the electric vehicle market. The immediate focus will now shift to optimizing manufacturing processes and reducing costs for large-scale production of this technology. The collaboration with Stellantis is crucial for Factorial to rapidly bring its technology to market and establish itself as a key player in the global EV supply chain. This development is expected to significantly impact other automakers and battery companies, acting as a catalyst to further accelerate the development and adoption of all-solid-state batteries. Ultimately, consumers can look forward to enjoying safer, longer-range, and faster-charging electric vehicles.

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