Device for manufacturing an electrode for a battery comprising an extruder having a current collector

A device for manufacturing an electrode strip for a battery, said electrode strip comprising at least one layer of electrochemically active composite material and a current collector strip, the manufacturing device comprising:

• an extruder comprising:
• a sheath delimiting a mixing chamber,
• an extrusion head giving the electrode strip leaving the extruder its shape;
• and
• an extrusion screw arranged in the mixing chamber,
• wherein the extrusion screw comprises:
• an outer tube mounted such that it rotates on itself in the mixing chamber, said outer tube comprising drive means to mix the active composite material in the mixing chamber and to cause said material to move downstream toward the extrusion head, and
• an inner tube arranged at least partially inside the outer tube and coaxially with said outer tube, said inner tube being stationary relative to the sheath and comprising an outlet located upstream of the extrusion head;
• and
• advancing and unwinding means to convey the current collector strip through the inner tube as far as the extrusion head.