IMPLANTABLE MEDICAL DEVICE BATTERY

• US 20110190842A1
• Filed: 01/29/2010
• Published: 08/04/2011
• Est. Priority Date: 01/29/2010
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Snyder, Terrence J., Johnson, David M.
• Granted Patent: US 8,433,409 B2
• Time in Patent Office: Days
• US Class Current: 607/37
• CPC Class Codes: A61N 1/375 Constructional arrangements, e.g. casings
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery comprises a tubular housing. An external surface of the tubular housing comprises a biocompatible material. The battery further comprises a battery header secured to an open end of the tubular housing, and the tubular housing and the battery header combine to form a substantially sealed enclosure. The battery also comprises one or more voltaic cells within the substantially sealed enclosure, and a feedthrough electrically connected to the voltaic cells and extending through the battery header to form a battery terminal. The battery header includes a radial groove opposite the tubular housing, and the radial groove is configured to receive a mating snap-fit electronic component subassembly of an implantable medical device.

Claims

1. A battery comprising:

a tubular housing, wherein an external surface of the tubular housing comprises a biocompatible material;

a battery header secured to an open end of the tubular housing, wherein the tubular housing and the battery header combine to form a substantially sealed enclosure;

one or more voltaic cells within the substantially sealed enclosure; and

a feedthrough electrically connected to the voltaic cells and extending through the battery header to form a battery terminal,

wherein the battery header includes a radial groove opposite the tubular housing, wherein the radial groove is configured to receive a mating snap-fit electronic component subassembly of an implantable medical device.

2. The battery of claim 1, further comprising a weld joint hermetically sealing an interface between the battery header and the tubular housing.

3. The battery of claim 1, wherein the battery terminal is a positively-charged battery terminal.

4. The battery of claim 3, wherein voltaic cells are electrically connected to the tubular housing such that the tubular housing and the battery header comprise a negatively-charged battery terminal.

5. The battery of claim 1, wherein the voltaic cells include lithium/silver vanadium oxcide voltaic cells.

6. The battery of claim 1, wherein the tubular housing and the battery header comprise titanium alloys.

7. The battery of claim 1, wherein the tubular housing is cylindrical.

8. An implantable medical device comprising:

a battery including;

a tubular battery housing, wherein an external surface of the tubular battery housing comprises a biocompatible material,

a battery header secured to an open end of the tubular battery housing, wherein the tubular battery housing and the battery header combine to form a substantially sealed enclosure,

one or more voltaic cells within the substantially sealed enclosure, and

a feedthrough electrically connected to the voltaic cells and extending through the battery header to form a battery terminal;

an electronic component subassembly including;

an electronics tray secured to the battery header opposite the tubular battery housing, and

a set of electronic components coupled to the electronics tray and electrically connected to the battery terminal; and

a tubular cover secured to the battery header opposite to the tubular battery housing, wherein the battery header and the tubular cover combine to form an enclosure encasing the feedthrough and the electronic component subassembly.

9. The implantable medical device of claim 8, wherein the battery header includes a radial groove opposite the tubular battery housing, wherein the electronics tray includes a radial protrusion, and wherein the electronics tray is snap-fit to the battery header in that the radial protrusion of the electronics tray is mated to the radial groove of the battery header.

10. The implantable medical device of claim 9, further comprising an insulative shield separating the set of electronic components from the tubular cover,

wherein the insulative shield is mated to radial groove opposite the electronics tray,

wherein the electronics tray comprises an insulative material that insulates the set of electronic components from the tubular cover, and

wherein the insulative shield and the electronics tray substantially surround the set of electronic components.

11. The implantable medical device of claim 8, wherein the electronics tray comprises an insulative material that insulates the set of electronic components from the tubular cover.

12. The implantable medical device of claim 8, further comprising a first weld joint hermetically sealing a first interface between the battery header and the tubular battery housing and a second weld joint hermetically sealing a second interface between the battery header and the tubular cover.

13. The implantable medical device of claim 8,

wherein the battery terminal is a positively-charged battery terminal,

wherein voltaic cells are electrically connected to the tubular battery housing such that the tubular battery housing and the battery header comprise a negatively-charged battery terminal.

14. The implantable medical device of claim 8, wherein the tubular battery housing, the battery header and the tubular cover comprise titanium alloys.

15. The implantable medical device of claim 8, wherein the tubular battery housing and the tubular cover are cylindrical, wherein the tubular battery housing and the tubular cover are have about equal diameters.

16. The implantable medical device of claim 8, wherein the tubular cover is a deep drawn component.

17. The implantable medical device of claim 8, wherein the implantable medical device is configured to one or more of a group consisting of:

deliver a cardiac rhythm management therapy;

deliver electrical stimulation therapy via one or more leads coupled to the implantable medical device;

deliver electrical stimulation therapy via one or more electrodes integrated in the tubular cover;

deliver drug therapy to a patient;

sense one or more physiological parameters of the patient via one or more electrodes; and

measure pressure within a patient cavity.

18. The implantable medical device of claim 8, wherein the set of electronic components includes a processor configured to control delivery of a medical therapy to a patient by the implantable medical device and/or sense one or more physiological parameters of the patient with the implantable medical device.

19. A method of manufacturing an implantable medical device comprising:

obtaining a battery, the battery including;

a tubular battery housing, wherein an external surface of the tubular battery housing comprises a biocompatible material,

a battery header secured to an open end of the tubular battery housing, wherein the tubular battery housing and the battery header combine to form a substantially sealed enclosure,

one or more voltaic cells within the substantially sealed enclosure, and

a feedthrough electrically connected to the voltaic cells and extending through the battery header to form a battery terminal;

obtaining an electronic component subassembly, the electronic component subassembly including;

an electronics tray, and

a set of electronic components coupled to the electronics tray and electrically connected to the battery terminal;

securing the electronic tray to the battery header opposite the tubular battery housing;

obtaining a tubular cover; and

securing the tubular cover to the battery header opposite to the tubular battery housing to form an enclosure encasing the feedthrough and the electronic component subassembly.

20. The method of claim 19, wherein securing the tubular cover to the battery header opposite to the tubular battery housing comprises welding the tubular cover to the battery header opposite to the tubular battery housing.

21. The method of claim 20, further comprising welding the battery header to the open end of the tubular battery housing before securing the electronic tray to the battery header.

22. The method of claim 19,

wherein the battery header includes a radial groove opposite the tubular battery housing, wherein the electronics tray includes a radial protrusion,

wherein securing the electronic tray to the battery header opposite the tubular battery housing includes snap-fitting the electronics tray to the battery header such that that the radial protrusion of the electronics tray is mated to the radial groove of the battery header.

23. The method of claim 19, further comprising forming an electrical connection between the set of electronic components and the feedthrough after securing the electronic tray to the battery header and before securing the tubular cover to the battery header.

24. The method of claim 23, wherein forming the electrical connection between the set of electronic components and the feedthrough comprises welding the feedthrough to an electrical contact of the set of electronic components.

25. The method of claim 23, wherein the implantable medical device is configured to one or more of a group consisting of:

deliver a cardiac rhythm management therapy;

deliver electrical stimulation therapy via one or more leads coupled to the implantable medical device;

deliver electrical stimulation therapy via one or more electrodes integrated in the tubular cover;

deliver drug therapy to a patient;

sense one or more physiological parameters of the patient via one or more electrodes; and

measure pressure within a patient cavity.

26. The method of claim 19, wherein the set of electronic components includes a processor configured to control delivery of a medical therapy to a patient by the implantable medical device and/or sense one or more physiological parameters of the patient with the implantable medical device.