As the demand for battery recycling accelerates alongside the global shift toward electrification, the need for efficient, safe, and scalable solid-/liquid separation technologies has become increasingly critical in black mass recovery. In particular, the drying process has a significant effect on safety, quality and recyclability of the components in lithium-ion batteries. A high solvent extraction rate is needed to achieve consistently high recovery rates while maintaining low foil attrition. Highly variable feed materials, including pouch and prismatic cells containing foil strings, black mass, and metal chips often pose a challenge for the drying process step. In his presentation, after an introduction into common drying methods used in lithium-ion battery recycling, Jasper Aalders will deep-dive into the method of “helix drying” an the importance of solvent removal, focusing on the engineering principles behind a helix dryer (including helical flow design, inert gas integration, dust handling, and temperature control systems). Another presentation focus will be an insight into the R&D developments in adapting the helix drying technology to address the unique challenges posed by shredded battery materials during the removal of the electrolytes, backed up by statistics from trials. Attendees will gain insights into the design rationale, operational benefits, and strategic value of helix drying in both centralized and decentralized recycling facilities aiming to meet tightening environmental regulations and circular economy targets.