Factorial, a developer of solid-state EV batteries has delivered B-samples of its 106+Ah lithium-metal solid-state battery cells to Mercedes-Benz.

Representing the latest step in their joint development agreement as both companies work towards product maturity and the series production of passenger EVs equipped with Factorial’s solid-state battery technology. In addition to Mercedes-Benz, Factorial has joint development agreements with Stellantis, Hyundai Motor Company, and Kia Corporation.

Factorial had previously delivered more than 1,000 100+Ah solid-state battery cells to Mercedes-Benz as part of the A-sample phase. The B-samples will be integrated into modules and battery packs for extensive testing and optimization. This phase will see Factorial validate the module and pack designs against Mercedes-Benz’s performance, while assessing the robustness of its own supply chain and manufacturing processes, ensuring scalability for future vehicle testing.

The solid-state battery cells delivered to Mercedes-Benz utilize Factorial’s proprietary FEST (Factorial Electrolyte System Technology) platform, which includes a lithium-metal anode. Factorial’s batteries are manufactured using existing equipment from lithium-ion battery production (requiring minimal modifications) that, in turn, streamline the manufacturing validation process and reduce long-term operating costs.