The Filling Nozzle Assembly is a critical component of the Electrolyte Filling System, responsible for the accurate, controlled, and leak-free transfer of liquid electrolyte from the supply system into individual battery cells. It ensures precise volumetric dosing and prevents contamination or spillage. The assembly is designed for use in electrical equipment manufacturing, specifically in battery production lines. It is a component-level product, meaning it is typically integrated into a larger filling system by original equipment manufacturers or system integrators. The assembly is constructed from materials selected for compatibility with electrolyte and corrosive environments: stainless steel (316L) for the body, fluoropolymers (e.g. PTFE, PFA) for internal seals and linings, and ceramic for wear-resistant components. Key parameters include operating pressure (1.0–1.6 MPa), flow rate (0.5–5.0 L/min, adjustable per cell type), filling accuracy (±0.5% relative to target volume), nozzle diameter (2–8 mm, selected based on cell fill port), operating temperature (10–50°C), seal material (FKM, per ASTM D2000), body material (316L, per ASTM A240), weight (0.3–0.8 kg, depending on configuration), connection thread (G1/4–G1/2, per ISO 228-1), leakage rate (≤0.01 mL/min at rated pressure), cycle life (≥500,000 cycles under normal operating conditions), and IP rating (IP54–IP65, per IEC 60529). These values are reference ranges and must be verified for the specific model and application. The assembly operates under the control of a PLC, which regulates the valve opening and closing to achieve the desired fill volume. It is essential to confirm compatibility with the electrolyte chemistry, cell design, and filling system requirements. Always consult the legal manufacturer or supplier for model-specific specifications and standards compliance.
The assembly connects to the electrolyte supply line. A valve mechanism within the assembly opens to allow pressurized electrolyte to flow through the nozzle tip into the cell. The flow is precisely controlled by the system's PLC based on set volume parameters, after which the valve closes to seal the line. The nozzle tip is positioned over the cell fill port, and the assembly ensures a leak-free seal during the filling process. The valve's opening and closing are timed to deliver the exact volume required, with accuracy maintained by the PLC's feedback control. The assembly is designed to minimize dead volume and prevent contamination, and its materials resist corrosion from the electrolyte.
