Patent ID: 7554791
Filing Date: 2009-06-30
Classification: H01G

Abstract:
1. An electrolytic capacitor stack disposed in a case, the case filled with electrolyte, the electrolytic capacitor stack comprising: a substantially planar anode having an anode perimeter and an anode connection member; a substantially planar separator in alignment with the substantially planar anode, the substantially planar separator having a separator perimeter; and a substantially planar cathode sandwiching the substantially planar separator against the substantially planar anode, the substantially planar anode, the substantially planar cathode, and the substantially planar separator being in alignment, with the anode perimeter extending outside the separator perimeter along a first section of the separator perimeter, the cathode perimeter extending outside the separator perimeter along a second section of the separator perimeter, and the anode and cathode perimeters overlapping outside the separator perimeter at an overlap portion, defining an opening between the overlap portion and the separator perimeter, the opening having at least one acute vertex disposed along the separator perimeter, with the separator perimeter extending outside the anode perimeter and the cathode perimeter along a third section of the separator perimeter which extends at least partially across the opening, wherein along the first section, the separator perimeter is sized such that an electrical isolation distance, sized to resist breakdown, exists between the separator perimeter and the cathode perimeter, and along the second section the separator perimeter is sized such that the electrical isolation distance exists between the separator perimeter and the anode perimeter, and along the third section, the separator is sized to provide the electrical isolation distance across the separator between the anode perimeter and the cathode perimeter.