ELECTROCHEMICAL ENERGY STORAGE CELL

An energy storage cell includes a cylindrical housing that encloses an interior space and a housing casing, a wound composite body arranged in the interior space and having a helical structure including at least two electrode strips and at least one separator strip arranged between the electrode strips, each including a strip-shaped current collector having an active material coating, the wound composite body includes two terminal end faces, a circumferential outer composite body lateral surface and a circumferential inner composite body lateral surface, the inner composite body lateral surface defines an axially oriented cavity, a winding core having a substantially cylindrical or hollow cylindrical shape and has an outer circumferential surface that rests flat on the inner composite body lateral surface, and the winding core has a local deviation from the cylindrical or hollow cylindrical shape in at least one region of the outer circumferential surface.