Batteries including a flat plate design

Patent metadata

Field	Value
Publication number	US-10115995-B2
Application number	US-201715474699-A
Country	US
Kind code	B2
Filing date	Mar 30, 2017
Priority date	Dec 31, 2002
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A battery having flat, stacked, anode and cathode layers. The battery can be adapted to fit within an implantable medical device.

First claim

What is claimed is:

1. A battery comprising:
a battery stack;
a battery case having a backfill hole, wherein the battery stack is located within the battery case; and
a terminal having a first end extending away from the case and a second end mounted within the backfill hole and coupled to the case, wherein the second end includes an upper cap portion and a lower widened portion with a narrow waist between the upper cap portion and the lower widened portion, wherein the lower widened portion is physically attached to the case at an inner surface of the backfill hole and the upper cap portion is connected to an outer surface of the case.

2. The battery of claim 1 , wherein the second end of the terminal is welded to the battery case to seal the backfill hole.

3. The battery of claim 1 , wherein the weld is a laser weld.

4. The battery of claim 1 , wherein the battery stack includes a plurality of alternating anode and cathode layers.

5. The battery of claim 4 , wherein each of the anode and cathode layers includes a substantially non-rectangular shape.

6. The battery of claim 4 , wherein the cathode material layer includes MnO 2 .

7. The battery of claim 1 wherein the case has a curved interior surface; and
the battery stack includes:
a first battery stack portion having an anode layer and a cathode layer and having a first edge surface that confronts the curved interior surface of the case; and
a second battery stack portion having an anode layer and a cathode layer and having a second edge surface that confronts the curved interior surface of the case;
wherein the first edge surface is set back from the second edge surface to define a profile generally congruent to a profile of the curved interior surface.

8. The battery of claim 7 , wherein the battery includes a third battery stack portion having an anode layer and a cathode layer and having a third edge surface that confronts the curved interior surface of the case, wherein the third edge surface is set back from the second edge surface.

9. The battery of claim 7 , wherein the first and second battery stacks have respective third and fourth edges, wherein the third edge surface is set back from the fourth edge surface.

10. The battery of claim 1 , wherein the battery stack includes:
a plurality of anode layers;
a plurality of separators; and
a plurality of cathode layers;
wherein the battery stack includes a layered stack structure having alternating anode layers and cathode layers with one or more separators interposed between each adjacent anode layer and cathode layer, and further wherein an outer perimeter edge surface of at least one of the cathode layers is offset from an outer perimeter edge surface of at least one of the anode layers that is adjacent to the cathode layer.

11. The battery of claim 10 , wherein the battery includes a flat, stacked battery structure such that the anode layer, the separator, and the cathode layer are in a layered, stacked configuration.

12. The battery of claim 1 , wherein the second end of the terminal has a larger diameter than a diameter of the backfill hole in the battery case such that there is an interference fit between the second end and the backfill hole.

13. The battery of claim 1 , wherein the battery stack includes a plurality of alternating anode and cathode layers; and including a one-piece insulating sheath dimensioned to substantially surround the battery stack, the insulating sheath including an opening for receiving the battery stack within the insulating sheath and an integral flap to at least partially cover the opening when the battery stack is within the insulating sheath.

14. The battery of claim 13 , wherein the insulating sheath includes one or more spaces for one or more extension tabs of the anode and cathode layers to extend through the insulating sheath.

15. The battery of claim 1 , wherein the backfill port is configured to allow electrolyte to be filled into the battery case before the terminal is mounted within the backfill hole.

16. The battery of claim 1 , wherein the terminal is metal and the case is metal and the terminal is mechanically and electrically coupled to the case.

17. The battery of claim 1 , wherein the terminal includes a chamfered region.

Assignees

• Cardiac Pacemakers Inc

Inventors

• O'Phelan Michael J
• Victor Tom G
• Haasl Benjamin J
• Swanson Lawrence D
• Kavanagh Richard J
• Barr A Gordon
• Dillon Reilly M

Classifications

• H01M10/0404 Primary

  Machines for assembling batteries · CPC title

• H01M2220/00

  Batteries for particular applications · CPC title

• H01M6/005

  Devices for making primary cells · CPC title

• H01M50/107

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

• H01M2002/0205

  Electricity · mapped topic