ECS-R Vacuum Electrolyte Injection & Standing Machine for Pouch/Cylindrical Cells, ERPCCVEISM

A Vacuum Electrolyte Injection & Standing Machine is a critical piece of hardware in both laboratory R&D and automated battery pilot lines. The primary challenge during the electrolyte wetting step is that modern dense, highly compacted electrodes (especially polyanionic cathodes like NFPP or ultra-high nickel NCM layers) feature extremely tight pore networks. Injecting electrolyte under standard atmospheric conditions traps air pockets within the cell stack, resulting in dry areas, high local current hotspots, and premature capacity fade.

The vacuum electrolyte injection & standing machine normally includes the following procedures: (1) Pre-Evacuation (Vacuuming): The assembled pouch or cylindrical cell is placed into the machine's sealed working chamber. The system draws a deep vacuum (typically -90 to -95 kPa), extracting all trace air and ambient moisture from the internal electrode folds and separator pores. (2) Precision Micro-Injection: While remaining under vacuum, a high-purity ceramic rotary metering pump delivers a precisely metered volume of electrolyte into the cell. (3) Vacuum Standing & Diffusion (The Pressure Swing): The machine enters its programmed standing phase. It toggles between deep vacuum levels and controlled atmosphere venting (often using an inert gas like Argon). This pressure swing mechanism utilizes capillary action to forcefully drive the liquid electrolyte deep into the micro-pores of the electrodes, achieving maximum wetting.