Battery encasement for implantable devices

• US 10,700,312 B2
• Filed: 03/27/2018
• Issued: 06/30/2020
• Est. Priority Date: 03/05/2015
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Nielsen, Christian S., Day, John K., Hovland, Erik J., Klaassen, Jody J., Tamirisa, Prabhakar, Vanelzen, Collette M.
• Primary Examiner(s): Gatewood, Daniel S
• Application Number:
  US15/936,984
• Publication Number:
  US 20180219189A1
• Time in Patent Office: 826 Days
• Field of Search: None
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/052 Li-accumulators
• 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 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• 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 50/119 Metals
• CPC Class Codes: H01M 50/184 characterised by their shape or structure
• CPC Class Codes: H01M 50/446 Composite material consisting of a mixture of organic and inorganic materials
• CPC Class Codes: H01M 50/545 formed by the casing of the cells cup shaped terminals adapted for cells having curved cross-section H01M50/56
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

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.

Claims

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 μ

m and 75 μ

m.

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.

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.

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 μ

m and 75 μ

m, 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.