Electrochemical cell (112; 114) having the following features: a. the cell comprises a band-shaped electrode-separator composite having the sequence anode/separator/cathode, b. the anode comprises a band-shaped metallic anode current collector laden with negative active electrode material, c. the cathode comprises a band-shaped metallic cathode current collector laden with positive active electrode material, d. the electrode-separator composite is in the form of a winding having two terminal end faces (103; 109), e. the anode and the cathode are arranged offset inside the electrode-separator composite, so that a longitudinal edge of the anode current collector exits from one of the terminal end faces and a longitudinal edge of the cathode current collector exits from the other of the terminal end faces, f. the cell has a contact plate (104; 704) which rests on one of the longitudinal edges, thus forming a line-like contact zone, g. the contact plate (104; 704) is joined to the longitudinal edge by welding, h. the contact plate (104; 704) comprises at least one slit (105a, 105b, 105c, 105d; 705a, 705b, 705c, 705d) and/or at least one perforation and the at least one slit and/or the at least one perforation are configured to counter a deformation of the contact plate during fabrication of a welded join, i. the electrode-separator composite is in the form of a spiral winding, j. the longitudinal edges (102; 110) of the anode current collector and the cathode current collector exiting from the terminal end faces (103; 109) of the winding have a spiral geometry and k. the line-like contact zone along which the contact plate (104; 704) is welded to the longitudinal edge has a spiral geometry, and characterized in that l. the longitudinal edge comprises one or more sections each of which are over their total length uninterruptedly joined to the contact plate (104; 704) via a weld seam (108; 116), wherein the section(s) uninterruptedly joined over their total length to the contact plate (104; 704) extend over at least 25% of the total length of the longitudinal edge. a. the cell comprises a band-shaped electrode-separator composite having the sequence anode/separator/cathode, b. the anode comprises a band-shaped metallic anode current collector laden with negative active electrode material, c. the cathode comprises a band-shaped metallic cathode current collector laden with positive active electrode material, d. the electrode-separator composite is in the form of a winding having two terminal end faces (103; 109), e. the anode and the cathode are arranged offset inside the electrode-separator composite, so that a longitudinal edge of the anode current collector exits from one of the terminal end faces and a longitudinal edge of the cathode current collector exits from the other of the terminal end faces, f. the cell has a contact plate (104; 704) which rests on one of the longitudinal edges, thus forming a line-like contact zone, g. the contact plate (104; 704) is joined to the longitudinal edge by welding, h. the contact plate (104; 704) comprises at least one slit (105a, 105b, 105c, 105d; 705a, 705b, 705c, 705d) and/or at least one perforation and the at least one slit and/or the at least one perforation are configured to counter a deformation of the contact plate during fabrication of a welded join, i. the electrode-separator composite is in the form of a spiral winding, j. the longitudinal edges (102; 110) of the anode current collector and the cathode current collector exiting from the terminal end faces (103; 109) of the winding have a spiral geometry and k. the line-like contact zone along which the contact plate (104; 704) is welded to the longitudinal edge has a spiral geometry, and characterized in that l. the longitudinal edge comprises one or more sections each of which are over their total length uninterruptedly joined to the contact plate (104; 704) via a weld seam (108; 116), wherein the section(s) uninterruptedly joined over their total length to the contact plate (104; 704) extend over at least 25% of the total length of the longitudinal edge.