Method of producing an electrode-separator winding, electrode-separator winding and button cell with such a winding

A method of producing an electrode-separator winding comprising:

• feeding a first current collector in strip form, which is divided in the longitudinal direction into mass sections covered with a positive electrode material and, arranged between the mass sections, contact sections not covered with the electrode material, to a winding device,
• feeding a second current collector in strip form, which is divided in the longitudinal direction into mass sections covered with a negative electrode material and, arranged between the mass sections, contact sections not covered with the electrode material, to the winding device,
• feeding two separators in strip form to the winding device, and
• winding up the first current collector in strip form, the second current collector in strip form and the separators in the winding device to form a winding with the sequence first current collector/separator/second current collector/separator or second current collector/separator/first current collector/separator,
• wherein
• a contact strip is welded on in at least one of the contact sections for the electrical contacting of the current collectors, or at least one of the contact sections is folded over to form a contact strip for the electrical contacting of the current collectors, and
• at least one of the separators is reinforced in a Z-shaped folding and at least one risk region in which the at least one separator within the completed electrode-separator winding lies against the at least one contact section in which the contact strip is welded on or against the at least one contact section folded over to form a contact strip.