Current collector with vent channels

Patent metadata

Field	Value
Publication number	US-2023099946-A1
Application number	US-202217895659-A
Country	US
Kind code	A1
Filing date	Aug 25, 2022
Priority date	Sep 29, 2021
Publication date	Mar 30, 2023
Grant date	—

Abstract

A battery includes a positive electrode. The positive electrode includes a first current collector and a first active material. A negative electrode includes a second current collector. The second current collector includes at least one vent channel on at least one surface of the second current collector. The negative electrode includes a second active material.

First claim

What is claimed is:

1 . A battery comprising:
a positive electrode comprising a first current collector and a first active material; a negative electrode comprising:
a second current collector comprising at least one vent channel on at least one surface of the second current collector; and
a second active material.

2 . The battery of claim 1 , wherein the at least one vent channel is configured to prevent air from being trapped between the second current collector and the second active material.

3 . The battery of claim 1 , wherein the negative electrode comprises lithium.

4 . The battery of claim 1 , wherein the at least one vent channel is configured to facilitate adhesion between the second current collector and the negative electrode.

5 . The battery of claim 1 , wherein the second current collector has a first planar surface and a second opposing planar surface and at least one first vent channel is configured to be disposed on the first planar surface and at least one second vent channel is configured to be disposed on the second opposing planar surface.

6 . The battery of claim 5 , further comprising, wherein the at least one first vent channel and the at least one second vent channel intersect at one or more points

7 . The battery of claim 5 , wherein the at least one first vent channel and the at least one second vent channel do not intersect.

8 . The battery of claim 1 , wherein the at least one vent channel is configured to reach a periphery of the at least one surface of the second current collector.

9 . The battery of claim 1 , wherein the at least one vent channel has a depth that is about half a thickness of the second current collector.

10 . The battery of claim 1 , wherein the at least one vent channel comprises a channel pattern comprising a plurality of channels that connect at a central location on the at least one surface.

11 . A battery comprising:
a positive electrode comprising a first current collector; a negative electrode comprising:
a second current collector comprising:
a first planar surface;
a second opposing planar surface;
a first vent channel pattern disposed on the first planar surface on at least one surface of the second current collector; and
a second vent channel pattern disposed on the second opposing planar surface of the second current collector, the first vent channel pattern being different than the second vent channel pattern.

12 . The battery of claim 11 , wherein at least one of the first vent channel pattern and the second vent channel pattern is configured to prevent air from being trapped between the second current collector and an active material.

13 . The battery of claim 11 , wherein the negative electrode comprises lithium.

14 . The battery of claim 11 , wherein at least one of the first vent channel pattern and the second vent channel pattern is configured to facilitate adhesion between the second current collector and an active material.

15 . A method, comprising:
providing a current collector having a first planar surface and a second opposing planar surface; depositing a mask on a portion of at least one of the first planar surface and the second opposing planar surface; and etching an unmasked region to create at least one vent channel.

16 . The method of claim 15 , further comprising depositing a mask on a portion of both of the first planar surface and the second opposing planar surface.

17 . The method of claim 15 , wherein the at least one vent channel is configured to prevent air from being trapped between the current collector and an active material.

18 . The method of claim 15 , wherein the at least one vent channel is configured to facilitate adhesion between the current collector and an active material.

19 . The method of claim 15 , wherein the at least one vent channel is configured to reach a periphery of at least one of the first planar surface and the second opposing planar surface.

20 . The method of claim 15 , wherein the at least one vent channel has a depth that is about half a thickness of the current collector.

Assignees

• Medtronic Inc

Inventors

• Viavattine Joseph J

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• C23F1/04 Primary

  Chemical milling · CPC title

• H01M4/70 Primary

  characterised by shape or form · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M50/30

  Arrangements for facilitating escape of gases · CPC title