Energy storage cell and production method

An energy storage cell, comprising:

• an electrode-separator assembly with the sequence anode/separator/cathode, the anode being ribbon-shaped and comprising a ribbon-shaped anode current collector with a first longitudinal edge, a second longitudinal edge parallel thereto, a main region loaded with a layer of negative electrode material, and a free edge strip extending along the first longitudinal edge and being not loaded with the negative electrode material, the cathode being ribbon-shaped and comprising a ribbon-shaped cathode current collector with a first longitudinal edge and a second longitudinal edge parallel thereto, a main region loaded with a layer of positive electrode material, and a free edge strip extending along the first longitudinal edge and being not loaded with the positive electrode material, wherein the electrode-separator assembly is in the form of a cylindrical winding with a first terminal end face bounded by a circumferential edge and a second terminal end face bounded by a circumferential edge and a winding shell located therebetween, wherein the anode and the cathode are arranged within the electrode-separator assembly such that the first longitudinal edge of the anode current collector protrudes from one of the terminal end faces and the first longitudinal edge of the cathode current collector protrudes from the other terminal end face of the electrode-separator assembly;
• an airtight and liquid-tight housing cup comprising a bottom and a terminal circular opening;
• a lid component with a circular edge that closes the terminal circular opening;
• wherein, in the housing cup, the electrode-separator assembly is arranged in axial alignment, with the first end face pointing towards the lid component and the second end face pointing towards the bottom, in certain cases being in direct contact with the bottom;
• an annular seal made of an electrically insulating material, that encloses the circular edge of the lid component and electrically insulates the housing cup and the lid component from each other;
• a sheet metal component connected by welding to a respective first longitudinal edge of a current collector protruding from the first terminal end face and wherein this current collector is electrically connected to the lid component via sheet metal component;
• and
• at least one insulating element made of an electrically insulating material that protects the sheet metal component and/or the first longitudinal edge of the current collector protruding from the first end face and/or the separate electrical conductor fixed to the sheet metal component from direct contact with the inner side of the housing cup, in particular in the region of the indentation,
• wherein the housing cup comprises an inner side and an outer side and, in axial sequence, a bottom, a central section and a closure section, wherein the central section is cylindrical and in the central section the winding shell of the electrode-separator assembly in the form of a winding is in contact with the inner side of the housing cup, and in the closure section, the annular seal is in press contact with the lid component and the inner side of the housing cup, and
• wherein the central section and the closure section are separated by an indentation which annularly circumferentially surrounds the outer side of the housing cup.