For the next generation of batteries, the utilization of a solid-state electrolyte presents a promising alternative. These offer a range of advantages in comparison to conventional lithium-ion batteries which utilize a liquid electrolyte. Solid-state electrolytes are, for example, considered non-flammable, cannot leak, and enable a substantial increase in energy and output density. Within the framework of the BMBF project “BiSSFest”, the Fraunhofer Institute for Surface Engineering and Thin Films IST is working, in collaboration with project partners, on the production of safe and high-performance solid-state batteries. The aim of the project, which started in December 2021, is the manufacture of solid-state batteries on a pilot scale in order to facilitate their industrial production within Germany in the long term.