Stellantis and Factorial have completed the integration of Factorial’s FEST® solid-state battery cells into a Dodge Charger Daytona development vehicle, marking the first automotive application of this technology in North America. The collaboration advances a multi-stage development program and has now entered a road-testing phase to validate performance, safety and reliability under real-world conditions.
Building on laboratory results that demonstrated FEST® cells with an energy density of 375 Wh/kg, ultra-fast charging from 15% to 90% in just 18 minutes, and reliable operation between –30 °C and 45 °C, engineers from both companies worked together to translate these capabilities into a full vehicle platform. Factorial’s cells were incorporated into the existing pack structure through an innovative, patented mechanical architecture developed by Stellantis. In parallel, control systems and pack designs were adjusted to meet stringent automotive requirements for durability, thermal management and crash safety.
The ongoing road-testing and calibration program will assess the integrated system’s behavior under a range of driving and charging scenarios. Data collected during these trials will help refine pack performance, optimize battery management strategies and confirm safety protocols before broader application.
Factorial’s CEO noted that the deep, full-stack collaboration—from cell chemistry through pack architecture—sets a new benchmark for automotive-grade solid-state batteries. Stellantis highlights the importance of leveraging FEST®’s compatibility with existing lithium-ion manufacturing processes, which it says offers a clear path to large-scale production and cost efficiencies.
This integration milestone represents a significant step forward in both companies’ demonstration program and underscores Factorial’s progress toward industrializing solid-state battery technology for automotive use. Continued testing and development will focus on ensuring consistent performance across diverse climates and driving conditions, paving the way for future vehicle programs that aim to capitalize on the promise of longer range, faster charging and enhanced safety.
Source: Stellantis Media
