Folded headspace insulator

Patent metadata

Field	Value
Publication number	US-12102832-B2
Application number	US-202117324556-A
Country	US
Kind code	B2
Filing date	May 19, 2021
Priority date	May 19, 2021
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A battery comprising a tubular battery housing having a first end and a second end. The first end and the second end can have a substantially same inner diameter and a substantially same outer diameter. The battery further comprises a battery cell within the tubular battery housing. The battery further comprises a top battery cover coupled to the first end and a bottom battery cover coupled to the second end to form a substantially sealed enclosure around the battery cell. Method for manufacturing the battery are also described.

First claim

What is claimed is:

1. A battery comprising:
a battery cell within a battery housing; and
a headspace insulator inserted between the battery cell and a top cover, the headspace insulator including an upper insulator portion, a lower insulator portion, and a neck joining the upper insulator portion and the lower insulator portion, wherein the upper insulator portion comprises a first planar surface and a second planar surface, wherein the neck exerts a compressive force against the lower insulator portion to retain the lower insulator portion against the battery cell, wherein the upper insulator portion includes a first plurality of openings and the lower insulator portion includes a second plurality of openings, wherein the first and the second plurality of openings are configured to provide electrolyte to the battery.

2. The battery of claim 1 , wherein the neck includes a neck opening for accommodating a battery tab of the battery.

3. The battery of claim 2 , wherein the neck opening accommodates a positive battery tab of the battery.

4. The battery of claim 2 , wherein the neck opening accommodates a negative battery tab of the battery.

5. The battery of claim 2 , wherein the neck displaces the battery tab from the battery housing.

6. The battery of claim 2 , further comprising an insulation tape disposed on at least a portion of the battery tab.

7. The battery of claim 1 , wherein the headspace insulator is comprised of electrically and thermally insulating material.

8. The battery of claim 1 wherein the lower insulator portion comprises a lower first planar surface and a lower second planar surface, wherein the lower first planar surface and the lower second planar surface are parallel to the first planar surface and the second planar surface.

9. The battery of claim 8 , wherein the neck joins the upper insulator portion to the lower insulator portion along a perimeter of the upper insulator portion and a perimeter of the lower insulator portion.

10. The battery of claim 1 , wherein the neck comprises a hinge.

11. The battery of claim 1 , wherein the upper insulator portion is movable relative to the lower insulator portion about the neck.

12. The battery of claim 1 , wherein a number of the first plurality of openings is different from a number of the second plurality of openings.

13. The battery of claim 1 , wherein a number of the first plurality of openings is equal to a number of the second plurality of openings.

14. The battery of claim 1 , wherein one or both of the first plurality of openings and the second plurality of openings forms a symmetrical pattern.

15. The battery of claim 1 , wherein one or both of the first plurality of openings and the second plurality of openings forms an asymmetrical pattern.

16. The battery of claim 1 , wherein a size of the first and the second plurality of openings is between 0.03 inches to 0.25 inches.

17. The battery of claim 2 , wherein a size of the first and the second plurality of openings is sufficiently small so that the battery tab cannot fit through any of the first and the second plurality of openings.

Assignees

• Medtronic Inc

Inventors

• Viavattine Joseph J
• Stockton Christopher T
• Zhao Hailiang
• Bomstad Timothy T
• Mallawaaratchy Jude M
• Patras George

Classifications

• H01M50/179

  for cells having curved cross-section, e.g. round or elliptic (H01M50/176, H01M50/181 take precedence) · CPC title

• H01M50/528

  Fixed electrical connections, i.e. not intended for disconnection · CPC title

• H01M50/169

  by welding, brazing or soldering · CPC title

• A61N1/3758

  Packaging of the components within the casing · CPC title

• H01M50/559

  Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells (H01M50/553 takes precedence) · CPC title