Implantable medical devices with electrically isolated batteries in a separate enclosure

Patent metadata

Field	Value
Publication number	US-2016129264-A1
Application number	US-201514936942-A
Country	US
Kind code	A1
Filing date	Nov 10, 2015
Priority date	Nov 12, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

Medical devices include a separate enclosure that houses a battery and electrically isolates the battery from external conditions such as any metal enclosures and ultimately isolates the battery from body fluids. Thus, the separate enclosure attaches to a housing of a medical device and provides for modularity of the battery which allows, for instance, different size batteries to be used with the same medical device design. The separate enclosure further prevents stimulation current from leaking back to the battery housing by providing the electrical isolation.

First claim

What is claimed is:

1 . A method of electrically isolating a battery of a medical device, comprising:
providing an outer enclosure; providing an insulation enclosure; placing the battery inside of the insulation enclosure, the battery having battery terminals; placing the insulation enclosure inside of the outer enclosure; and coupling the outer enclosure to the medical device while the battery is inside of the insulation enclosure and while the insulation enclosure is inside of the outer enclosure with the battery terminals extending beyond the insulation enclosure and outer enclosure and into the medical device.

2 . The method of claim 1 , further comprising attached an adapter plate to the outer enclosure while the battery is inside of the insulation enclosure and while the insulation enclosure is inside of the outer enclosure with the battery terminals extending through an opening in the adapter plate.

3 . The method of claim 2 , wherein the adapter plate is welded to the outer enclosure and to the medical device.

4 . The method of claim 2 , wherein the adapter plate is constructed of a biocompatible metal.

5 . The method of claim 1 , wherein the outer enclosure is constructed of a biocompatible metal.

6 . The method of claim 1 , wherein the insulation enclosure is constructed of a polymer.

7 . A medical device, comprising:
a metal housing; circuitry within the metal housing; an outer enclosure coupled to the metal housing; an insulation enclosure inside of the outer enclosure; a battery inside of the insulation enclosure, the battery having battery terminals that extend beyond the insulation enclosure and the outer enclosure and into the medical device and are electrically coupled to the circuitry.

8 . The medical device of claim 7 , further comprising an adapter plate attached to the outer enclosure and attached to the medical device while the battery is inside of the insulation enclosure and while the insulation enclosure is inside of the outer enclosure with the battery terminals extending through an aperture in the adapter plate.

9 . The medical device of claim 8 , wherein the adapter plate is welded to the outer enclosure and to the medical device.

10 . The medical device of claim 8 , wherein the adapter plate is constructed of a biocompatible metal.

11 . The medical device of claim 7 , wherein the outer enclosure is constructed of a biocompatible metal.

12 . The medical device of claim 7 , wherein the insulation enclosure is constructed of a polymer.

13 . A method of electrically isolating a battery of a medical device, comprising:
providing an insulation enclosure; providing the battery inside of the insulation enclosure, the battery having battery terminals; providing an adapter plate attached to the insulation enclosure; and attaching the adapter plate to the medical device while the battery is inside of the insulation enclosure and while the insulation enclosure is attached to the adapter plate with the battery terminals extending beyond the insulation enclosure and the adapter plate and into the medical device.

14 . The method of claim 13 , wherein providing the insulation enclosure comprises overmolding the insulation enclosure over the battery and into openings within the adapter plate.

15 . The method of claim 13 , wherein the adapter plate is constructed of a biocompatible metal.

16 . The method of claim 13 , wherein the insulation enclosure is constructed of a polymer.

17 . A medical device, comprising:
a metal housing; circuitry within the metal housing; an adapter plate attached to the metal housing; an insulation enclosure attached to the adapter plate; a battery inside of the insulation enclosure, the battery having battery terminals that extend beyond the insulation enclosure and the adapter plate and into the medical device and are electrically coupled to the circuitry.

18 . The medical device of claim 17 , wherein the insulation enclosure is an overmold about the battery and into openings within the adapter plate.

19 . The medical device of claim 17 , wherein the adapter plate is constructed of a biocompatible metal.

20 . The medical device of claim 17 , wherein the insulation enclosure is constructed of a polymer.

Assignees

• Medtronic Inc

Inventors

• Hovland Erik J
• Iyer Rajesh V
• May Steven J
• Munns Gordon O
• Santa Wesley A

Classifications

• A61N1/375

  Constructional arrangements, e.g. casings · CPC title

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title

• H01M50/224

  Metals · CPC title

• H01M50/202

  Casings or frames around the primary casing of a single cell or a single battery · CPC title

• H01M50/55

  on the same side of the cell · CPC title