Battery encasement for implantable devices

Patent metadata

Field	Value
Publication number	US-10700312-B2
Application number	US-201815936984-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Mar 5, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Various embodiments of a battery assembly include a first housing shell, a second housing shell, an insulator and battery components. The first housing shell has a first perimeter side wall, a first housing bottom, and a first contact area on the first housing bottom. The second housing shell has a second perimeter side wall, a second housing bottom, and a second contact area on the second housing bottom. The second housing shell is disposed in the first housing shell with the second contact area opposing the first contact area. The insulator is interposed between the first housing shell and the second housing shell to effect electrical insulation between the first housing shell and the second housing shell. The battery components include an anode electrode, a cathode electrode, and a separator interposed between the cathode electrode and the anode electrode. The separator contains an electrolyte.

First claim

What is claimed is:

1. A battery assembly comprising:
a first housing shell having a bottom wall and a perimeter wall extending from the bottom wall, the perimeter wall comprising a first surface that engages the bottom wall and an opposite second surface, inner surfaces of the walls defining a cavity;
a second housing shell disposed in the cavity;
an insulator interposed between the housing shells to effect electrical insulation between the housing shells, the insulator comprising a flange having a bottom surface that covers the second surface and an opposite top surface, the second housing shell being spaced apart from the top surface;
an anode electrode disposed in cavity that is electrically communicated to one of the housing shells;
a cathode electrode disposed in cavity that is electrically communicated to another one of the housing shells;
a separator interposed between the cathode electrode and the anode electrode, the separator including an electrolyte; and
an electronic assembly directly engaging the top surface,
wherein the first housing shell has a first contact projecting from the perimeter wall and the second housing shell comprises a perimeter wall and a second contact projecting from the perimeter wall of the second housing shell, the contacts each engaging a bonding pad of the electronic assembly.

2. The battery assembly recited in claim 1 , wherein the first housing shell has a first contact projecting from the perimeter wall and the second housing shell comprises a perimeter wall and a second contact projecting from the perimeter wall of the second housing shell, the contacts each extending perpendicular to the bottom wall.

3. The battery assembly recited in claim 1 , wherein the housing shells are formed of a titanium foil material.

4. The battery assembly recited in claim 1 , wherein the housing shells are formed of a titanium foil material having a thickness between 50 μm and 75 μm.

5. The battery assembly recited in claim 1 , wherein the first housing shell is formed of a first material and the second housing shell is formed of a second material that is different than the first material.

6. The battery assembly recited in claim 1 , wherein the insulator is formed of molded polypropylene.

7. The battery assembly recited in claim 1 , wherein the insulator comprises molded polypropylene and Kevlar®.

8. The battery assembly recited in claim 1 , wherein the insulator comprises a thermoplastic material.

9. The battery assembly recited in claim 1 , wherein the insulator comprises a tubular body.

10. The battery assembly recited in claim 1 , wherein the housing shells are bonded together.

11. The battery assembly as recited in claim 1 , wherein the electronic assembly includes at least one monitoring sensor selected from the group consisting of blood pressure sensors, glucose sensors, activity sensors, and cardiac sensors.

12. A battery assembly comprising:
a first housing shell having a bottom wall, opposite front and back walls that each extend from the bottom wall and opposite first and second side walls that each extend from the bottom wall, the first and second side walls each being positioned between the front and back walls, inner surfaces of the walls defining a cavity;
a second housing shell disposed in the cavity;
an insulator interposed between the housing shells;
an anode electrode disposed in cavity that is electrically communicated to one of the housing shells;
a cathode electrode disposed in cavity that is electrically communicated to another one of the housing shells;
a separator interposed between the cathode electrode and the anode electrode, the separator including an electrolyte; and
an electronic assembly directly engaging the flange,
wherein the first housing shell has a first contact projecting from the first side wall and the second housing shell comprises a perimeter wall and a second contact projecting from the perimeter wall, the contacts each engaging a bonding pad of the electronic assembly.

13. The battery assembly recited in claim 12 , wherein the front wall, the back wall and the first and second side walls each comprise a first surface that engages the bottom wall and an opposite second surface, the insulator comprising a flange that engages the second surfaces.

14. The battery assembly recited in claim 13 , wherein the flange has a bottom surface that covers the second surfaces and an opposite top surface, the second housing shell being spaced apart from the top surface.

15. The battery assembly recited in claim 12 , wherein the first housing shell has a first contact projecting from the first side wall and the second housing shell comprises a perimeter wall and a second contact projecting from the perimeter wall, the contacts each extending parallel to the bottom wall.

16. A battery assembly comprising:
a first housing shell formed of a titanium foil material having a thickness between 50 μm and 75 μm, the first housing shell having a bottom wall, opposite front and back walls that each extend from the bottom wall and opposite first and second side walls that each extend from the bottom wall, the first and second side walls each being positioned between the front and back walls, inner surfaces of the walls defining a cavity, the first housing shell having a first contact projecting from the first side wall, the first contact extending parallel to the bottom wall;
a second housing shell being disposed in the cavity, the second housing shell comprising a perimeter wall and a second contact projecting from the perimeter wall, the second contact extending parallel to the bottom wall;
an insulator comprising molded polypropylene and Kevlar® interposed between the housing shells;
an electronic assembly directly engaging the insulator, the contacts each engaging a bonding pad of the electronic assembly, the electronic assembly including at least one monitoring sensor selected from the group consisting of blood pressure sensors, glucose sensors, activity sensors, and cardiac sensors;
an anode electrode disposed in cavity that is electrically communicated to one of the housing shells;
a cathode electrode disposed in cavity that is electrically communicated to another one of the housing shells; and
a separator interposed between the cathode electrode and the anode electrode, the separator including an electrolyte,
wherein the front wall, the back wall and the first and second side walls each comprise a first surface that engages the bottom wall and an opposite second surface, the insulator comprising a flange that engages the second surfaces.

17. The battery assembly recited in claim 1 , wherein the separator is formed of a polymer electrolyte membrane.

18. The battery assembly recited in claim 1 , wherein the insulator is an insulating film laminated on at least one of the first housing shell and the second housing shell.

19. The battery assembly recited in claim 1 , wherein the insulator includes at least one of fibers, alumina particles, or glass spheres configured to effect separation and electrical isolation of the first housing shell and the second housing shell.

Assignees

• Medtronic Inc

Inventors

• Nielsen Christian S
• Day John K
• Hovland Erik J
• Klaassen Jody J
• Tamirisa Prabhakar
• Vanelzen Collette M

Classifications

• H01M10/425 Primary

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/184

  characterised by their shape or structure · CPC title

• H01M50/119

  Metals · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title