Slurry mixer for secondary battery electrode material and secondary battery manufacturing apparatus including slurry mixer

A secondary battery manufacturing apparatus comprising:

• a slurry mixer comprising (i) an inner cylinder that comprises an inner cylinder body configured to accommodate a slurry to be mixed and an upper support member having a ring shape and fixed to an upper end portion of the inner cylinder body, (ii) an outer cylinder that comprises an outer cylinder body configured to rotatably accommodate the inner cylinder, a flange fixed to the upper end portion of the outer cylinder body, and a cover mounted on the fixed flange and positioned on the upper support member, and (iii) an elastic sealing portion mounted on the cover, the elastic sealing portion being elastically deformable, the elastic sealing portion including a lower end portion in contact with the upper support member, and the elastic sealing portion being configured to prevent the slurry from leaking through a space between the cover and the upper support member;
• a driving unit connected to the inner cylinder of the slurry mixer and configured to provide a rotational force to the inner cylinder;
• and
• a stirring unit configured to stir the slurry accommodated in the inner cylinder as the inner cylinder rotates.