Electrode and secondary battery

Patent metadata

Field	Value
Publication number	US-2023216090-A1
Application number	US-202217981950-A
Country	US
Kind code	A1
Filing date	Nov 7, 2022
Priority date	Jan 5, 2022
Publication date	Jul 6, 2023
Grant date	—

Abstract

An electrode includes a base material and an active material layer. The active material layer is disposed on a base material surface. One or more grooves are formed on an active material layer surface. The one or more grooves linearly extend along the surface of the active material layer. In a plan view, each of the one or more grooves includes an inlet region, an intermediate region, and an outlet region. Each of the inlet region and the outlet regions is configured such that a first pressure loss occurring when a fluid flows in a forward direction is smaller than a second pressure loss occurring when the fluid flows in a backward direction.

First claim

What is claimed is:

1 . An electrode comprising:
a base material; and an active material layer, wherein the active material layer is disposed on a surface of the base material, the active material layer has one or more grooves on a surface of the active material layer, the one or more grooves linearly extend along the surface of the active material layer, in a plan view, each of the one or more grooves includes an inlet region, an intermediate region, and an outlet region, the inlet region includes an inlet opening portion at a periphery of the active material layer, the outlet region includes an outlet opening portion at the periphery of the active material layer, the intermediate region is disposed between the inlet region and the outlet region, the intermediate region connects the inlet region with the outlet region, each of the inlet region and the outlet region is configured such that a first pressure loss occurring when a fluid flows in a forward direction is smaller than a second pressure loss occurring when the fluid flows in a backward direction, the forward direction represents a direction from the inlet region to the outlet region, and the backward direction represents a direction from the outlet region to the inlet region.

2 . The electrode according to claim 1 , wherein at least one of the inlet region and the outlet region is configured such that streams of the fluid converge when the fluid flows in the forward direction and diverge when the fluid flows in the backward direction.

3 . The electrode according to claim 1 , wherein at least one of the inlet region and the outlet region includes a portion where a cross-sectional area decreases in the forward direction.

4 . The electrode according to claim 1 , wherein at least one of the inlet region and the outlet region includes a Tesla valve-shaped planar pattern.

5 . The electrode according to claim 1 , wherein
in a cross section orthogonal to a direction along which the one or more grooves extend, the inlet opening portion has a first cross-sectional area, the intermediate region has a second cross-sectional area, and the first cross-sectional area is smaller than the second cross-sectional area.

6 . A secondary battery comprising:
an electrode having a base material and an active material layer; and an electrolytic solution, wherein the active material layer is disposed on a surface of the base material, the active material layer has one or more grooves on a surface of the active material layer, the one or more grooves linearly extend along the surface of the active material layer, in a plan view, each of the one or more grooves includes an inlet region, an intermediate region, and an outlet region, the inlet region includes an inlet opening portion at a periphery of the active material layer, the outlet region includes an outlet opening portion at the periphery of the active material layer, the intermediate region is disposed between the inlet region and the outlet region, the intermediate region connects the inlet region with the outlet region, each of the inlet region and the outlet region is configured such that a first pressure loss occurring when a fluid flows in a forward direction is smaller than a second pressure loss occurring when the fluid flows in a backward direction, the forward direction represents a direction from the inlet region to the outlet region, and the backward direction represents a direction from the outlet region to the inlet region.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shionoya Haruka
• Kintsu Yusuke
• Mimura Tetsuya
• Kondo Takeshi
• Kawamoto Yuta

Classifications

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M4/0445 Primary

  Forming after manufacture of the electrode, e.g. first charge, cycling · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/052

  Li-accumulators · CPC title