Feedthrough insulator cap for medical device battery

A medical device comprising:

• an outer housing;
• and
• a high-rate primary battery within the outer housing, wherein the high-rate primary battery is configured to supply power to one or more electronic components of the medical device, and wherein the high-rate primary battery comprises:
• an enclosure defining an interior of the battery and a feedthrough aperture open to an exterior of the battery;
• a ferrule extending through the feedthrough aperture and coupled to the enclosure;
• an insulator extending through the ferrule to the exterior of the battery;
• a pin extending through the insulator from the interior of the battery to the exterior of the battery, wherein the insulator electrically insulates the pin from the ferrule;
• a feedthrough insulator cap disposed on at least a portion of the ferrule, at least a portion of the insulator, and at least a portion of an interior segment of the pin, the feedthrough insulator cap comprising a brim comprising an annular disk extending substantially within a plane, the brim having an interior edge and an exterior edge, and a crown integrally formed with the interior edge of the brim, wherein the crown extends above the plane of the brim in a first direction;
• a first electrode disposed within the enclosure and electrically coupled to the pin;
• a second electrode disposed within the enclosure and separated a distance from the first electrode;
• and
• an electrolyte disposed between the first electrode and the second electrode.