Sintered electrodes to store energy in an implantable medical device
First Claim
1. An apparatus, comprising:
- a capacitor case sealed to retain electrolyte, the capacitor case inner surface defining a conductive substrate;
a first electrode comprising a plurality of first electrode material portions disposed in the capacitor case, the plurality of first electrode material portions comprising a sintered portion disposed on a second substrate, wherein the plurality of first electrode material portions are disposed onto the second substrate, in a nested configuration, with at least a first first electrode portion having a different area than a second first electrode portion;
a conductor coupled to the second substrate in electrical communication with the sintered portion, the conductor seatingly extending through the capacitor case to a terminal disposed on an exterior of the capacitor case with the terminal in electrical communication with the sintered portion;
a second electrode disposed in the capacitor case, the second electrode comprising a sintered portion disposed on the conductive substrate on the inner surface of the capacitor case;
a separator disposed between the first electrode and the second electrode; and
a second terminal disposed on the exterior of the capacitor case and in electrical communication with the second electrode, with the terminal and the second terminal electrically isolated from one another.
1 Assignment
0 Petitions
Accused Products
Abstract
An example includes a capacitor case sealed to retain electrolyte, at least one anode disposed in the capacitor case, the at least one anode comprising a sintered portion disposed on a substrate, an anode conductor coupled to the substrate in electrical communication with the sintered portion, the anode conductor sealingly extending through the capacitor case to an anode terminal disposed on the exterior of the capacitor case with the anode terminal in electrical communication with the sintered portion, a cathode disposed in the capacitor case, a separator disposed between the cathode and the anode and a cathode terminal disposed on an exterior of the capacitor case and in electrical communication with the cathode, with the anode terminal and the cathode terminal electrically isolated from one another.
111 Citations
18 Claims
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1. An apparatus, comprising:
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a capacitor case sealed to retain electrolyte, the capacitor case inner surface defining a conductive substrate; a first electrode comprising a plurality of first electrode material portions disposed in the capacitor case, the plurality of first electrode material portions comprising a sintered portion disposed on a second substrate, wherein the plurality of first electrode material portions are disposed onto the second substrate, in a nested configuration, with at least a first first electrode portion having a different area than a second first electrode portion; a conductor coupled to the second substrate in electrical communication with the sintered portion, the conductor seatingly extending through the capacitor case to a terminal disposed on an exterior of the capacitor case with the terminal in electrical communication with the sintered portion; a second electrode disposed in the capacitor case, the second electrode comprising a sintered portion disposed on the conductive substrate on the inner surface of the capacitor case; a separator disposed between the first electrode and the second electrode; and a second terminal disposed on the exterior of the capacitor case and in electrical communication with the second electrode, with the terminal and the second terminal electrically isolated from one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system, comprising:
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a hermetically sealed device housing; a battery disposed in the hermetically sealed device housing; a capacitor disposed in the hermetically sealed device housing, the capacitor comprising; a capacitor case sealed to retain electrolyte; a plurality of anode material portions disposed in the capacitor case, the plurality of anode material portions comprising a sintered portion disposed on a substrate, wherein the plurality of anode material portions are disposed onto the substrate in a nested configuration, with at least a first anode portion having a different area than a second anode portion; an anode conductor coupled to the substrate in electrical communication with the sintered portion, the anode conductor sealingly extending through the capacitor case to an anode terminal disposed on exterior of the capacitor case with the anode terminal in electrical communication with the sintered portion; a cathode disposed in the capacitor case; a separator disposed between the cathode and the anode; and a cathode terminal disposed on the exterior of the capacitor case and in electrical communication with the cathode, with the anode terminal and the cathode terminal electrically isolated from one another, and an electronic cardiac rhythm management circuit coupled to the battery and the capacitor and adapted to discharge the capacitor to provide a therapeutic defibrillation pulse. - View Dependent Claims (10, 11, 12, 13)
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14. A method, comprising:
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sintering anode material onto an anode foil; and sintering a plurality of anode material portions onto the foil in a nested configuration, with at least a first anode portion having a different area than a second anode portion; stacking the anode material and foil into a capacitor stack that includes a cathode separated from the anode material and the anode foil by a separator; disposing the capacitor stack into a capacitor case; coupling the anode material to an anode conductor disposed through the capacitor case; sealing the anode conductor to the capacitor case with a seal that resists a flow of electrolyte; filling the capacitor case with an electrolyte; and sealing the electrolyte in the capacitor case. - View Dependent Claims (15, 16)
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17. An apparatus, comprising:
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a capacitor case sealed to retain electrolyte, the capacitor case inner surface defining a conductive substrate; a first electrode comprising a sintered portion disposed on the conductive substrate on the inner surface of the capacitor case; a second electrode disposed in the interior of the capacitor case and disposed against the first electrode, the second electrode separated from the first electrode with a separator that is disposed between the first electrode and the second electrode, wherein the second electrode includes a plurality of second electrode material portions disposed in the capacitor case, the plurality of second electrode material portions comprising a sintered portion disposed on a second substrate, wherein the plurality of second electrode material portions are disposed onto the second substrate in a nested configuration, with at least a first second electrode portion having a different area than a second second electrode portion; a conductor sealingly disposed through the capacitor case in electrical isolation from the capacitor case, the conductor coupled with the second electrode and with a terminal disposed outside the capacitor case, the terminal in electrical communication with the second electrode; and a second terminal disposed outside the capacitor case in electrical communication with the capacitor case. - View Dependent Claims (18)
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Specification