Flat capacitor having staked foils and edge-connected connection members
First Claim
1. An implantable medical device comprising:
- one or more leads for sensing electrical signals of a patient or for applying electrical energy to the patient;
a monitoring circuit for monitoring heart activity of the patient through one or more of the leads; and
a therapy circuit for delivering electrical energy through one or more of the leads to a heart of the patient, wherein the therapy circuit includes a capacitor, the capacitor comprising;
a plurality of anodes, each anode comprising an anode foil having a formation voltage of approximately 441 volts or greater and having a porous structure;
a plurality of cathodes;
a plurality of electrolyte impregnated separators, wherein the capacitor is formed in a stack having alternating anodes and cathodes and at least one of the plurality of electrolyte impregnated separators located between each anode and each cathode;
wherein each of the plurality of anodes includes a separate connection member attached to the anode, the connection member having a first section extending over and confronting a front edge face of the anode, wherein the connection member comprises a main member having a generally L-shaped cross-section; and
and wherein adjacent anodes are stacked so that their respective connection members are positioned in a stacked relationship adjacent to each other such that the outer faces of the adjacent connection members are substantially planar relative to each other.
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Accused Products
Abstract
A method of joining a connection member to a capacitor foil using a staking tool having a tip of less than 0.030″ (0.762 mm) in diameter. Another embodiment couples multiple connection members of a capacitor together by edge-connecting each connection member to its substantially flush neighboring connection members. In one aspect, a capacitor includes a multi-anode stack connected at a first weld by a weld joint less than 0.060″ (1.524 mm) in diameter and a tab attached to one of the anodes of the multi-anode stack at a second weld. In one aspect, an exemplary method joining one or more foils using a staking tool having a tip of less than approximately 0.060″ (1.524 mm) in diameter. In another aspect, a capacitor including a capacitor case having an electrolyte therein and a high formation voltage anode foil having a porous structure and located within the capacitor case.
283 Citations
19 Claims
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1. An implantable medical device comprising:
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one or more leads for sensing electrical signals of a patient or for applying electrical energy to the patient; a monitoring circuit for monitoring heart activity of the patient through one or more of the leads; and a therapy circuit for delivering electrical energy through one or more of the leads to a heart of the patient, wherein the therapy circuit includes a capacitor, the capacitor comprising; a plurality of anodes, each anode comprising an anode foil having a formation voltage of approximately 441 volts or greater and having a porous structure; a plurality of cathodes; a plurality of electrolyte impregnated separators, wherein the capacitor is formed in a stack having alternating anodes and cathodes and at least one of the plurality of electrolyte impregnated separators located between each anode and each cathode; wherein each of the plurality of anodes includes a separate connection member attached to the anode, the connection member having a first section extending over and confronting a front edge face of the anode, wherein the connection member comprises a main member having a generally L-shaped cross-section; and and wherein adjacent anodes are stacked so that their respective connection members are positioned in a stacked relationship adjacent to each other such that the outer faces of the adjacent connection members are substantially planar relative to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable medical device comprising:
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one or more leads for sensing electrical signals of a patient or for applying electrical energy to the patient; a monitoring circuit for monitoring heart activity of the patient through one or more of the leads; and a therapy circuit for delivering electrical energy through one or more of the leads to a heart of the patient, wherein the therapy circuit includes one or more capacitors, each capacitor comprising; a plurality of anodes, each anode having a front edge surface; a plurality of connection members, wherein each of the plurality of anodes includes one of the plurality of connection members attached to the anode, each connection member comprising a member having an inner surface confronting and abutting the front edge surface of the attached anode, and wherein stacked, adjacent connection members are positioned such that the outer surfaces of the adjacent connection members are substantially planar relative to each other; a plurality of cathodes; and a plurality of electrolyte impregnated separators, wherein the capacitor is formed in a stack having alternating anodes and cathodes and at least one of the plurality of electrolyte impregnated separators located between each anode and each cathode. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification