A winding device includes: a first unwinding equipment, a second unwinding equipment, a third unwinding equipment and a fourth unwinding equipment, respectively configured for outputting a first diaphragm, a cathode pole piece, a second diaphragm and an anode pole piece; a merging equipment, configured for merging passing material strip layers; a pole-piece-inserting equipment, configured for cutting off the passing cathode pole piece, and transporting a starting end of the cathode pole piece downstream; a winding equipment, including a turret and at least two winding needles, the turret is adapted to drive each of the winding needles to pass by a first station and a second station sequentially; and a guiding roller, the layers of material strip located between the first station and the second station winding through the guiding roller.

An apparatus (100) for making coils, preferably for electrochemical cells intended for battery production, comprises a feed unit (2) configured to feed at least a first strip-shaped article (N1) intended to form a first coil (B1) and a second strip-shaped article (N2) intended to form a second coil (B2), a winding unit (1) comprising a plurality of winding heads (10) including at least a first winding head (11) configured to wind the first strip-shaped article (N1) and a second winding head (12) configured to wind the second strip-shaped article (N2) and at least one movement device (3) of said winding heads (10) configured to move said first winding head (11) and said second winding head (12). Said first winding head (11) and said second winding head (12) define respective winding axes (X1, X2) substantially parallel to each other. Said winding unit (1) is configured so as to define a separation plane (P), said separation plane (P) being substantially perpendicular to said winding axes (X1, X2) and being positioned so that said first strip-shaped article (N1) and said second strip-shaped article (N2) are located one on one side and the other on the opposite side of said separation plane (P) at least at said first winding head (11) and said second winding head (12).