Injection nozzle and injection apparatus containing same

An injection nozzle for injecting an electrolyte solution into a battery cell, comprising:

• a body, containing a channel arranged along a height direction of the injection nozzle, wherein a first outlet is disposed at a lower part of the channel;
• an injection pipe configured to inject the electrolyte solution, the injection pipe threaded through the channel in a manner of reciprocating movement along the height direction;
• and
• a baffle, connected to the body and configured to cover the first outlet when a lower end portion of the injection pipe is higher than the first outlet to block a residual liquid of the electrolyte solution dripping from the lower end portion of the injection pipe, and be propped open by the injection pipe when the lower end portion of the injection pipe is lower than the first outlet to allow the electrolyte solution to be conveyed from an upper end portion of the injection pipe to the lower end portion of the injection pipe,
• wherein the baffle comprises a plurality of sectorial elastic sheets capable of deforming elastically, the sectorial elastic sheets each have a beveled face and a tip portion, the beveled face is a flat face at an inclination to a plane on the baffle, when the injection pipe moves downward and touches the sectorial elastic sheets, the sectorial elastic sheets are deformed and the tip portions of the sectorial elastic sheets are propped open.