ECS-R Economic Vacuum Electrolyte Standing Machine for Pouch/Cylindrical Cells, ERPCCEVESM

A Vacuum Electrolyte Standing (Soaking/Diffusion) Machine is a dedicated piece of post-injection battery equipment used in both laboratory pilot lines and mass manufacturing of pouch, cylindrical, and prismatic lithium-ion, sodium-ion, and supercapacitor cells. While the injection machine introduces liquid electrolyte into the cell casing, the standing machine applies controlled, multi-stage vacuum-pressure cycling and high-temperature soaking to drive the viscous liquid deep into the dense, microporous structure of the electrodes and separator.

The vacuum electrolyte standing machine normally includes the following procedures: (1) Cell Loading & Chamber Evacuation: Cells are loaded into multi-tray standing chambers (or individual vacuum fixtures for cylindrical/prismatic cells). Chambers are sealed and evacuated to target vacuum levels (typically -90 kPa to -98 kPa) to extract residual air pockets trapped inside the internal cell stack. (2) Cyclic Pressure & Vacuum Diffusion (Pressure Pulsing): The machine alternates between deep vacuum and controlled pressure backfilling (using dry N2, Ar, or dry air). Deep vacuum expands trapped micro-bubbles (N2/O2) and draws them out of capillary channels, while positive pressure pushes the liquid electrolyte into sub-micron pores of thick cathodes (e.g., high-nickel NMC, LFP) and dense graphite/silicon anodes. (3) Thermostatic Thermal Soaking: Integrated heating platens or circulating hot air maintain an elevated temperature (35-55 °C). Elevating temperature lowers the viscosity and surface tension of carbonate solvents, significantly accelerating wetting kinetics without decomposing heat-sensitive lithium salts (LiPF6, LiFSI). (4) Mechanical Clamping & Pressure Equalization (Optional): For pouch cells, soft-pack pneumatic or spring-loaded clamping platens apply uniform mechanical pressure (0.05 MPa - 0.3 MPa) across the face of the pouch.