Battery lithium cluster growth control

Patent metadata

Field	Value
Publication number	US-11387498-B2
Application number	US-202117181355-A
Country	US
Kind code	B2
Filing date	Feb 22, 2021
Priority date	May 2, 2016
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

An apparatus includes a battery stack including a plurality of alternating anodes and cathodes, wherein each of the anodes is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators, and an edge tape extending across a top of the first and second separators.

First claim

The claimed invention is:

1. An apparatus comprising:
a battery stack including a plurality of alternating anodes and cathodes;
wherein each of the anodes is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators; and
wherein the battery stack is positioned within a soaker pad assembly.

2. The apparatus of claim 1 , wherein the soaker pad assembly includes an internal soaker pad and an external tape.

3. The apparatus of claim 2 , wherein the internal soaker pad is positioned adjacent to one or more edges of the battery stack.

4. The apparatus of claim 3 , wherein the internal soaker pad is configured to soak up any electrolyte from a perimeter of the anodes.

5. The apparatus of claim 2 , wherein the external tape includes a polyamide tape.

6. The apparatus of claim 1 , wherein the soaker pad assembly includes a middle hole cut-out of the soaker pad assembly configured to improve electrolyte wetting of the battery stack.

7. The apparatus of claim 1 , further including a battery case, wherein the battery stack is enclosed within the battery case.

8. The apparatus of claim 7 , including a case tape located on an inner surface of the case proximate a feedthrough, wherein the case tape at least partially covers a bottom surface of the case and extends to at least partially cover two sidewalls of the case.

9. The apparatus of claim 1 , further including an edge tape extending across a top of the first and second separators.

10. The apparatus of claim 9 , wherein the edge tape covers over a portion of the tab.

11. An apparatus comprising:
an implantable housing holding electronics;
a battery located within the implantable housing, the battery including a battery case and a battery stack within the case, the battery stack including a plurality of alternating anodes and cathodes, wherein each anode is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators;
wherein the battery stack is positioned within a soaker pad assembly.

12. The apparatus of claim 11 , wherein the soaker pad assembly includes an internal soaker pad and an external tape.

13. The apparatus of claim 12 , wherein the internal soaker pad is positioned adjacent to one or more edges of the battery stack.

14. The apparatus of claim 13 , wherein the internal soaker pad is configured to soak up any electrolyte from a perimeter of the anodes.

15. The apparatus of claim 12 , wherein the external tape includes a polyamide tape.

16. The apparatus of claim 11 , wherein the soaker pad assembly includes a middle hole cut-out of the soaker pad assembly configured to improve electrolyte wetting of the battery stack.

17. The apparatus of claim 11 , further including an edge tape extending across a top of the first and second separators.

18. A method comprising:
stacking a plurality of alternating anodes and cathodes into a battery stack, wherein each anode is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators; and
positioning a soaker pad assembly around the battery stack.

19. The method of claim 18 , wherein the soaker pad assembly includes an internal soaker pad and an external tape.

20. The method of claim 19 , wherein the internal soaker pad is positioned adjacent to one or more edges of the battery stack and is configured to soak up any electrolyte from a perimeter of the anodes.

Assignees

• Cardiac Pacemakers Inc

Inventors

• Vedoy Arild

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/466

  U-shaped, bag-shaped or folded · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title