Electrolytic capacitor capable of insertion into the vasculature of a patient

A capacitor, which comprises:

• a) a casing having a cylindrical casing sidewall extending to closed opposed first and second end walls;
• b) a first anode and a second anode, each comprising a radiused anode sidewall meeting a planar sidewall portion extending to first and second anode end walls, wherein the anodes are in a side-by-side relationship having the respective planar sidewall portions facing each other;
• c) a cathode comprising a conductive substrate having first and second major faces supporting a cathode active material and extending to spaced apart first and second side edges meeting with upper and lower edges, wherein a middle portion of the conductive substrate has the cathode active material supported on both the first and second major faces thereof and is positioned between the facing planar anode sidewall portions with the remaining portions of the conductive substrate curving around the first and second anode sidewalls in opposite directions with the first and second side edges each meeting the conductive substrate adjacent to the middle portion thereof and wherein the curving portions of the conductive substrate support the cathode active material on the major face facing the respective anode sidewalls to thereby provide an electrode assembly housed inside the casing;
• d) a separator positioned between the side-by-side anodes and the cathode to prevent them from contacting each other;
• e) a working electrolyte contained inside the casing;
• and
• f) wherein each of the first and second anodes is connected to an anode terminal electrically isolated from a cathode terminal.

A method for providing a capacitor, comprising the steps of:

• a) providing a casing having a cylindrical casing sidewall extending to closed first and second end walls;
• b) providing at least one anode comprising a radiused anode sidewall extending to first and second anode end walls;
• c) providing a cathode comprising at least one conductive substrate having first and second major faces, at least one of which supports a cathode active material, wherein the conductive substrate curves around the anode sidewall, but is prevented from contact therewith by an intermediate separator to thereby form an electrode assembly housed inside the casing;
• d) filling a working electrolyte inside the casing;
• e) connecting the anode to an anode terminal electrically isolated from a cathode terminal;
• and
• f) hermetically sealing the casing by one of an electrolyte fill opening provided with a plug sealed to the casing sidewall or with an electrolyte fill opening through the casing sidewall having the sidewall fused to itself.

A capacitor, which comprises:

• a) a casing having a casing sidewall extending to closed first and second end walls;
• b) an anode comprising a radiused anode sidewall extending to first and second anode end walls with at least two slots formed into the anode sidewall;
• c) a cathode comprising first and second conductive substrates, each having first and second major faces extending to spaced apart first and second side edges meeting with upper and lower edges with a cathode active material supported on at least the first major faces thereof, wherein a first side edge of each conductive substrate resides in one of the respective slots with the remaining portion of the substrates curving around the anode sidewall in opposite directions with the second side edges meeting the other conductive substrate adjacent to its slot, wherein the conductive substrates curving around the anode sidewall are prevented from contact with the anode by an intermediate separator to thereby form an electrode assembly housed inside the casing;
• d) a working electrolyte contained inside the casing;
• and
• e) wherein the anode is connected to an anode terminal electrically isolated from a cathode terminal.

A capacitor, which comprises:

• a) a casing having a casing sidewall extending to closed first and second end walls;
• b) anode comprises first and second anodes, each comprising a radiused anode sidewall meeting a planar sidewall portion extending to first and second anode end walls, wherein the anodes are in a side-by-side relationship having the respective planar sidewall portions facing each other;
• c) a cathode comprising a conductive substrate having first and second major faces, wherein a middle portion of the conductive substrate has cathode active material supported on both the first and second major faces thereof and is positioned between the facing planar anode sidewall portions with the remaining portions of the conductive substrate curving around the first and second anode sidewalls in opposite directions with the first and second side edges each meeting adjacent to the middle portion of the conductive substrate and wherein the curving portions of the conductive substrate support the cathode active material on the major face facing the respective anode sidewalls and being prevented from contact with the anode by an intermediate separator to thereby form an electrode assembly housed inside the casing;
• d) a working electrolyte contained inside the casing;
• and
• e) wherein the anode is connected to an anode terminal electrically isolated from a cathode terminal.

A capacitor, which comprises:

• a) a casing having a casing sidewall extending to closed first and second end walls;
• b) an anode comprises first and second anodes, each comprising a radiused anode sidewall meeting a planar sidewall portion extending to first and second anode end walls, wherein the anodes are in a side-by-side relationship having the respective planar sidewall portions facing each other;
• c) a cathode comprising a conductive substrate having first and second major faces, wherein a first portion of the conductive substrate adjacent to a first side edge has the cathode active material supported on both the first and second major faces thereof and is positioned between the facing planar anode sidewall portions with the remaining portion of the conductive substrate curving around the first then the second anode sidewalls with a second substrate side edge meeting the conductive substrate adjacent to the first portion thereof and wherein the curving portion of the conductive substrate supports the cathode active material on the major face facing the respective anode sidewalls and is prevented from contact with the anode by an intermediate separator to thereby form an electrode assembly housed inside the casing;
• d) a working electrolyte contained inside the casing;
• and
• e) wherein the anode is connected to an anode terminal electrically isolated from a cathode terminal.