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Stellantis and Factorial Energy have reached a groundbreaking milestone in electric vehicle (EV) technology by successfully validating automotive-sized solid-state battery cells. This achievement brings the industry closer to commercializing advanced batteries that promise faster charging, higher energy density, and improved performance for EVs.
Key Highlights
- Validation of 77Ah FEST™ solid-state battery cells with 375Wh/kg energy density
- Fast charging from 15% to 90% in just 18 minutes
- Operates in temperatures from -30°C to 45°C (-22°F to 113°F)
- High power output with discharge rates up to 4C
- Stellantis to deploy these batteries in a demonstration fleet by 2026
This milestone centers on Factorial’s FEST™ (Factorial Electrolyte System Technology), which has produced battery cells with an energy density of 375Wh/kg. These cells have endured over 600 cycles and are moving toward automotive qualification, a significant feat for large-format lithium-metal solid-state batteries. Unlike traditional lithium-ion batteries, these solid-state cells offer substantial improvements, including the ability to charge from 15% to over 90% in 18 minutes at room temperature. They also support high power demands with discharge rates up to 4C, making them ideal for modern EVs.
The batteries excel in diverse conditions, operating reliably between -30°C and 45°C (-22°F to 113°F), thanks to Factorial’s innovative electrolyte formulation. This overcomes previous solid-state limitations, ensuring performance across various climates. Stellantis and Factorial are also optimizing battery pack designs to reduce weight and boost efficiency, which could enhance vehicle range and lower costs.
Ned Curic, Stellantis Chief Engineering and Technology Officer, called this a “solid-state revolution,” while Factorial’s CEO, Siyu Huang, praised the balance of energy density, cycle life, and safety. Building on a $75 million investment from Stellantis in 2021, the companies plan to integrate these batteries into a demonstration fleet by 2026, advancing the future of sustainable EVs.
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