Energy storage cell

An energy storage cell, comprising:

• a housing comprising a metallic, tubular housing portion with a terminal circular opening;
• an electrode-separator assembly in the form of a winding having two terminal end faces and a wound jacket, the electrode-separator assembly comprising an anode, a cathode, and a separator in a sequence of anode/separator/cathode, the anode being in ribbon form and comprising an anode current collector in ribbon form with a first longitudinal edge and a second longitudinal edge, the cathode being in ribbon form and comprising a cathode current collector in ribbon form with a first longitudinal edge and a second longitudinal edge, wherein the anode current collector comprises a main region in strip form laden with a layer of negative electrode material and a free edge strip not laden with the negative electrode material that extends along the first longitudinal edge of the anode current collector, wherein the cathode current collector comprises a main region in strip form laden with a layer of positive electrode material and a free edge strip not laden with the positive electrode material that extends along the first longitudinal edge of the cathode current collector;
• and
• an at least partly metallic contact element in direct contact with a respective first longitudinal edge and connected to the respective longitudinal edge by welding, wherein the respective first longitudinal edge is the first longitudinal edge of the anode current collector or the first longitudinal edge of the cathode current collector,
• wherein the electrode-separator assembly in the form of the winding is disposed in the housing and aligned axially such that the wound jacket adjoins an inside of the tubular housing portion,
• wherein, within the electrode-separator assembly in the form of the winding, the anode and the cathode are formed and/or arranged with respect to one another such that the first longitudinal edge of the anode current collector surpasses one of the terminal end faces, and the first longitudinal edge of the cathode current collector surpasses the other of the terminal end faces,
• wherein the contact element comprises a circular edge and closes the terminal circular opening of the tubular housing portion in a gas- and liquid-tight manner, and
• wherein the contact element is or comprises a metallic membrane electrically connected to the respective first longitudinal edge and configured to, in response to a pressure in the housing exceeding a threshold, bend such that electrical contact between the contact element and the respective first longitudinal edge is lost.