Patent ID: 6986796

Claim:
An electrical energy storage device, which comprises: a) a container having a surrounding side wall providing an opening leading into the container; b) an electrode assembly comprising an anode and a cathode in an electrochemical association with each other and disposed inside the container; c) a lid having space apart upper and lower surfaces joined by a peripheral edge and secured to the open end of the container to provide a casing housing the electrode assembly, wherein the lid has at least a unitary terminal ferrule extending below the lid lower surface and comprising a cylindrically shaped inner surface with at least a portion thereof having machined scoring marks; d) a terminal lead connected to one of the anode and cathode electrodes and extending through the terminal ferrule to a position spaced above the upper surface of the lid, wherein a glass surrounds the terminal lead and fills and anchors into the machined scoring marks to hermetically seal the terminal lead in the terminal ferrule in an insulated relationship with respect to the casing; and e) an electrolyte provided in the casing to activate the anode and cathode electrodes.