Energy-storage element and method for producing same

An energy storage element, comprising:

• a cathode comprising a cathode current collector comprising a main region loaded on both sides with a layer of positive electrode material and a first free edge strip not loaded with the positive electrode material, the first free edge strip extending along an edge of the cathode current collector;
• an anode comprising an anode current collector comprising a main region loaded on both sides with a layer of negative electrode material and a second free edge strip not loaded with the negative electrode material, the second free edge strip extending along an edge of the anode current collector;
• and
• a first contact sheet metal member in direct contact with the cathode current collector and a second contact sheet metal member in direct contact with the anode current collector,
• wherein the cathode and the anode are separated by a separator or a solid electrolyte layer and form a sequence cathode/separator or solid electrolyte layer/anode,
• wherein a respective free edge strip of the first free edge strip or the second free edge strip has, as a result of a forming process, a U-shaped or V-shaped cross-section and thus an elongated depression on one side and an elongated elevation corresponding to the depression on an opposite side, and
• wherein a respective portion of the elongated elevation is inserted into one of:
• a portion of the elongated depression, the portion of the elongated depression being disposed in a turn of the respective free edge strip that is radially adjacent to the respective portion of the elongated elevation, or
• an elongated depression of a further free edge strip of a further electrode.