4.1 Clean & Dry Rooms

Clean and dry rooms are specialized, tightly controlled environments that protect sensitive battery materials from contamination and moisture. They are essential for ensuring product quality and process stability in key production steps like electrode manufacturing and cell assembly.

A typical clean and dry room setup includes several critical components:

• Sealed dry room: An airtight space built with moisture-resistant materials to maintain ultra-low humidity (often below 1% RH) to protect lithium-based materials from reacting with water vapor.
• Vapour-tight ductwork: Prevents moisture ingress through the ventilation system and ensures controlled airflow throughout the space.
• Dehumidification unit (DHU): Continuously removes moisture from incoming air to maintain the required low humidity levels inside the dry room.
• Fan filter units (FFUs): Combine HEPA filters with fans to circulate and clean the air, removing airborne particles and maintaining cleanroom classification standards.
• Personal and material airlocks: Serve as transition zones between controlled and uncontrolled areas, minimizing contamination during personnel movement or material transfer.

Together, these systems create a stable, ultra-clean and dry environment that is foundational to safe and high-performance battery cell production.