Apparatus and Method for Making a Coil, Preferably for an Electrochemical Cell Intended for the Production of Batteries

An apparatus (100) for making a coil (B) for an electrochemical cell intended for the production of batteries, said apparatus (100) comprising:

• a feed unit (2) configured to feed at least one strip-shaped article (N) formed by a plurality of strips preferably including conductor strips (N1, N3) and separator strips (N2, N4), said feed unit (2) comprising a movable portion (20), wherein respective feed paths (8) are defined for each of said strips, said feed paths (8) comprising a respective storage segment (81), said storage segments (81) being substantially parallel to each other;
• a winding unit (1) that includes at least one winding head (10) configured to wind said strip-shaped article (N) to make said coil (B);
• said feed unit (2) being configured so as to vary, by moving said movable portion (20), a respective longitudinal extension of each of said storage segments (81), said longitudinal extension of said storage segments (81) being varied simultaneously, for a same amount, and keeping said storage segments (81) substantially parallel to each other.