ELECTROLYTE INJECTION NOZZLE, ELECTROLYTE INJECTION APPARATUS, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

An electrolyte injection nozzle, an electrolyte injection apparatus, a battery cell, a battery, and an electric apparatus are provided. This application pertains to the field of battery technologies. The electrolyte injection nozzle includes an expansion segment, where a flow area of the electrolyte injection nozzle increases in the expansion segment along a direction from an inlet end of the electrolyte injection nozzle to an outlet end of the electrolyte injection nozzle.