Battery Cell Filling Head With Dual Pressure Electrolyte Wetting

The patent applies parameter changes by dynamically adjusting the pressure differential across the electrolyte injection system. A pump creates positive pressure to force electrolyte into the cell while a vacuum pump creates negative pressure to enhance infiltration into porous electrodes. This dual pressure control transforms the slow passive infiltration process into an active, accelerated process that maintains high filling speed without requiring excessive dead volume buffering.

The patent implements periodic action through cyclic vacuum treatment during the filling process. The vacuum pump operates in cycles to periodically evacuate trapped gases from the porous electrodes, creating favorable conditions for electrolyte infiltration at each cycle. This periodic vacuum assistance prevents gas blockages that would otherwise slow down the wetting process and extend filling time.

The patent applies segmentation by treating each battery cell individually rather than as part of a batch. Each cell receives dedicated electrolyte injection through its own fluid channel, and vacuum treatment is applied independently to each cell. This segmentation prevents electrolyte spilling from one cell from contaminating others, eliminating the need for extensive cleaning and maintenance while maintaining batch processing capability through parallel individual treatment.

The patent introduces an intermediary sealing mechanism at the cell level. A seal is positioned between the electrolyte injection point and the cell interior to prevent electrolyte from escaping onto external surfaces or neighboring cells. This intermediary barrier allows vacuum and pressure operations to proceed without generating harmful spilling effects that would require cleaning and maintenance downtime.