MIXING DEVICE AND METHOD FOR SECONDARY BATTERY

A mixing device for a secondary battery, the mixing device including a container part (10) storing a slurry (90), a driving part (20) configured to rotate the container part, and a mixing jig part (30) in the container part, wherein the slurry has a stirring hole (95) therein, the mixing jig part creating the stirring hole in the slurry, the stirring hole increasing a contact area of the slurry for an additive (99).