Accelerating electrolyte filling of battery cells using electrolyte vapor pretreatment

Abstract

A system for filling a battery cell with electrolyte includes an electrolyte filling chamber configured to enclose a battery cell including an electrolyte filling port. A first heater is configured to heat the electrolyte filling chamber to a predetermined temperature. A vacuum source is configured to control a vacuum in the electrolyte filling chamber. A vapor generator is configured to supply a vapor from at least one of a liquid electrolyte and a liquid electrolyte co-solvent in the electrolyte filling chamber for a predetermined period. An electrolyte hopper is configured to fill the battery cell with the liquid electrolyte after the predetermined period. The predetermined temperature is greater than 40º C. and vacuum is less than 1bar. The vapor generator is located inside or outside of the electrolyte filling chamber.

Dependencies are inferred from the claim text.