Energy storage cell and production method

A lithium-ion cell, comprising:

• a housing comprising a metallic tubular housing part made of aluminum or an aluminum alloy with a terminal circular opening;
• a contact element that closes the terminal circular opening of the tubular housing part, the contact element comprising a metal disk, a contact sheet metal member, a tubular metal pole pin, and an insulator, and
• an electrode-separator assembly having an anode, a cathode, and a separator with the sequence anode/separator/cathode, wherein the electrode-separator assembly is in the form of a cylindrical winding with two terminal end faces and a winding shell located therebetween, wherein the electrode-separator assembly is disposed and is axially aligned so that the winding shell abuts an inside of the tubular housing part,
• wherein the anode is ribbon-shaped and comprises a ribbon-shaped anode current collector made of nickel or copper or a nickel or copper alloy, wherein the anode current collector comprises a first longitudinal edge and a second longitudinal edge and two ends, wherein the anode current collector further comprises a strip-shaped main region loaded with a layer of negative electrode material and a free edge strip extending along the first longitudinal edge which is not loaded with the negative electrode material,
• wherein the cathode is ribbon-shaped and comprises a ribbon-shaped cathode current collector made of aluminum or an aluminum alloy, wherein the cathode current collector comprises a first longitudinal edge and a second longitudinal edge and two ends, wherein the cathode current collector further comprises a strip-shaped main region loaded with a layer of positive electrode material and a free edge strip extending along the first longitudinal edge which is not loaded with the positive electrode material,
• 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 of the terminal end faces,
• wherein the metal disk comprises aluminum or an aluminum alloy, wherein the metal disk has a circular edge and is arranged in the tubular housing part such that the circular edge abuts the inside of the tubular housing part along a circumferential contact zone, and wherein the edge of the metal disk is connected to the tubular housing part by a circumferential weld seam,
• wherein the contact sheet metal member comprises nickel or copper or a nickel or copper alloy, wherein the contact sheet metal member has two sides, one side facing in the direction of the metal disk and the other side being in direct contact with a respective longitudinal edge and is connected to the respective longitudinal edge by welding, the respective longitudinal edge being the first longitudinal edge of the anode current collector or the first longitudinal edge of the cathode current collector,
• wherein the tubular metal pole pin is welded to the contact sheet metal member and is led out of the housing of the cell through an opening in the metal disk, and
• wherein the insulator electrically insulates the pole pin and the contact sheet metal member against the metal disk.