Method and apparatus for connecting electrodes having apertures

An apparatus, comprising:

• a capacitor stack including a plurality of substantially planar electrodes;
• a first substantially planar anode disposed in the capacitor stack, the first substantially planar anode including a first etched portion, a first unetched portion, and material defining a first aperture extending through the first unetched portion;
• a second substantially planar anode having a second etched portion and a second unetched portion;
• a capacitor case including a first opening sized for passage of the capacitor stack, with the capacitor stack disposed in the capacitor case;
• a substantially planar cathode disposed in the capacitor stack and connected to the capacitor case;
• electrolyte disposed in the capacitor case;
• a first seal connecting a conforming cover to the first opening, the first seal adapted to resist the flow of electrolyte;
• an anode terminal connected to the first and second substantially planar anode and passing through the case, with a second seal sealing the anode terminal to the capacitor case, the second seal adapted to resist the flow of electrolyte;
• a cathode terminal connected to the capacitor case;
• cardiac rhythm management electronics connected to the anode terminal and the cathode terminal;
• and
• a hermetically sealed device housing the capacitor case and the cardiac rhythm management electronics;
• wherein the first and second substantially planar anodes are in alignment with a first laser weld connecting the material defining the first aperture and the second unetched portion.

An apparatus, comprising:

• a capacitor stack with a first substantially planar electrode including a first protruding connection member with a first aperture passing through the first protruding connection member, and a second substantially planar electrode including a second protruding connection member in overlapping alignment with the first protruding connection member such that the first aperture in the first protruding connection member overlaps with a non-aperture portion of the second protruding connection member, with a weld at least partially disposed through the first aperture, the weld connecting the first and second substantially planar electrodes;
• a capacitor case, the capacitor stack disposed in the capacitor case;
• and
• electrolyte disposed in the capacitor case.