Battery assembly for medical device

Patent metadata

Field	Value
Publication number	US-12311187-B2
Application number	US-202217812506-A
Country	US
Kind code	B2
Filing date	Jul 14, 2022
Priority date	Apr 18, 2019
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

In some examples, a battery assembly for an implantable medical device. The battery assembly may include an electrode stack comprising a plurality of electrode plates, wherein the plurality of electrode plates comprises a first electrode plate including a first tab extending from the first electrode plate and a second electrode plate including a second tab extending from the second electrode plate; a spacer between the first tab and the second tab; and a rivet extending through the first tab, second tab, and spacer, wherein the rivet is configured to mechanically attach the first tab, second tab, and spacer to each other.

First claim

The invention claimed is:

1. A battery assembly comprising:
a battery housing;
an electrode stack comprising a plurality of electrode plates, wherein the plurality of electrode plates including a first tab stack of anode tabs extending from anode plates of the electrode stack and a second tab stack of cathode tabs extending from cathodes plates of the electrode stack, wherein the first tab stack is adjacent to the second tab stack and a gap separates the first tab stack from the second tab stack; and
a shim located on a top tab of at least one of the first tab stack or the second tab stack, wherein the shim is located between the at least one of the first tab stack or the first tab of the second tab stack and the battery housing.

2. The assembly of claim 1 , wherein the shim spans the gap between the first tab stack and the second tab stack.

3. The assembly of claim 1 , wherein the shim is formed of an electrically insulative material to electrically isolate the first tab stack and the second tab stack from the battery housing.

4. The assembly of claim 1 , wherein the battery housing is configured to apply a compressive force to the first tab stack and the second tab stack via the shim.

5. The assembly of claim 1 , wherein the second tab stack includes a first cathode tab and a second cathode tab, the assembly further comprising a first spacer located between the first cathode tab and the second cathode tab.

6. The assembly of claim 5 , further comprising a second spacer between the first cathode tab and the second cathode tab, and wherein the first spacer has a thickness less than a thickness of the second spacer.

7. The assembly of claim 5 , wherein the second tab stack includes a third cathode tab, the assembly further comprising a second spacer between the second cathode tab and the third cathode tab.

8. The assembly of claim 7 , wherein the first spacer has a thickness less than a thickness of the second spacer.

9. The assembly of claim 1 , further comprising a weld on the second tab stack extending from a top tab of the second tab stack to a bottom tab of the second tab stack.

10. An implantable medical device system comprising:
an outer housing;
processing circuitry; and
a battery assembly within the outer housing, the battery assembly comprising:
a battery housing,
an electrode stack comprising a plurality of electrode plates, wherein the plurality of electrode plates including a first tab stack of anode tabs extending from anode plates of the electrode stack and a second tab stack of cathode tabs extending from cathodes plates of the electrode stack, wherein the first tab stack is adjacent to the second tab stack and a gap separates the first tab stack from the second tab stack, and
a shim located on a top tab of at least one of the first tab stack or the second tab stack, wherein the shim is located between the at least one of the first tab stack or the first tab of the second tab stack and the battery housing,

wherein the processing circuitry is configured to control at least one of the delivery electrical stimulation from the implantable medical device to a patient or sensing of electrical signals of the patient by the implantable medical device using power supplied by the battery assembly.

11. The system of claim 10 , wherein the shim spans the gap between the first tab stack and the second tab stack.

12. The system of claim 10 , wherein the shim is formed of an electrically insulative material to electrically isolate the first tab stack and the second tab stack from the battery housing.

13. The system of claim 10 , wherein the battery housing is configured to apply a compressive force to the first tab stack and the second tab stack via the shim.

14. The system of claim 10 , wherein the second tab stack includes a first cathode tab and a second cathode tab, the assembly further comprising a first spacer located between the first cathode tab and the second cathode tab.

15. The system of claim 14 , further comprising a second spacer between the first cathode tab and the second cathode tab, and wherein the first spacer has a thickness less than a thickness of the second spacer.

16. The system of claim 14 , wherein the second tab stack includes a third cathode tab, the assembly further comprising a second spacer between the second cathode tab and the third cathode tab.

17. The system of claim 16 , wherein the first spacer has a thickness less than a thickness of the second spacer.

18. The system of claim 10 , further comprising a weld on the second tab stack extending from a top tab of the second tab stack to a bottom tab of the second tab stack.

19. The system of claim 10 , further comprising an implantable medical lead including at least one electrode electrically coupled to the battery assembly, wherein the processing circuitry is configured to control the delivery electrical stimulation from the implantable medical device to a patient using power supplied by the battery assembly by at least controlling the delivery of the electrical stimulation to the patient via the at least one electrode on the implantable medical lead.

20. The system of claim 10 , wherein the electrical stimulation delivered to the patient includes as least one of pacing pulses, a cardioversion shock, or a defibrillation shock.

Assignees

• Medtronic Inc

Inventors

• Louwagie Jeffrey J
• Aamodt Paul B
• Brama Vincent
• Finstrom Nicholas H
• Hintz Michael B
• Yakovlev Vadim A
• O'Connell Kevin D
• Swenson Richard W
• Schmidt Brian P
• Viavattine Joseph J
• Zhang Puqiang
• Zhao Hailiang
• Hu Chao

Classifications

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M50/477

  characterised by their shape · CPC title

• A61N1/378 Primary

  Electrical supply · CPC title

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title