Electrode, secondary battery, battery pack, vehicle, and stationary power supply

Patent metadata

Field	Value
Publication number	US-2025096281-A1
Application number	US-202418777156-A
Country	US
Kind code	A1
Filing date	Jul 18, 2024
Priority date	Sep 20, 2023
Publication date	Mar 20, 2025
Grant date	—

Abstract

An electrode includes a current collector and an active material-containing portion. The current collector has a first porosity, and the electrode including the current collector and the active material-containing portion has a second porosity. The first porosity is 70% or more and 90% or less and the second porosity is 60% or more and 80% or less.

First claim

What is claimed is:

1 . An electrode, comprising:
a current collector; and an active material-containing portion, the current collector has a first porosity, and the electrode including the current collector and the active material-containing portion has a second porosity, wherein the first porosity is 70% or more and 90% or less and the second porosity is 60% or more and 80% or less.

2 . The electrode according to claim 1 , wherein the active material-containing portion is supported on the current collector.

3 . The electrode according to claim 1 , wherein the current collector contains metal fibers, and an average curved path ratio inside the current collector is 1.3 or more and 2.5 or less.

4 . The electrode according to claim 3 , wherein a fiber diameter of the metal fibers is 1 μm or more and 100 μm or less.

5 . The electrode according to claim 1 , wherein a thickness of the current collector is 1 mm or more and 50 mm or less.

6 . The electrode according to claim 1 , wherein the active material-containing portion includes an active material, a conductive agent, and a binder.

7 . A secondary battery, comprising:
a positive electrode; a negative electrode; and an electrolyte, wherein at least one of the positive electrode and the negative electrode is the electrode according to claim 1 .

8 . A battery pack comprising the secondary battery according to claim 7 .

9 . The battery pack according to claim 8 , further comprising:
an external power distribution terminal; and a protective circuit.

10 . The battery pack according to claim 8 , comprising a plurality of the secondary batteries,
wherein the secondary batteries are electrically connected in series, in parallel, or in combination of series and parallel.

11 . A vehicle comprising the battery pack according to claim 8 .

12 . The vehicle according to claim 11 , wherein the vehicle includes a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.

13 . A stationary power supply comprising the battery pack according to claim 8 .

Assignees

• Toshiba Kk

Inventors

• Yamashita Yasunobu
• Hoshina Keigo

Classifications

• H01M2004/021

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

• H01M4/806

  Nonwoven fibrous fabric containing only fibres · CPC title

• H01M2220/10

  Batteries in stationary systems, e.g. emergency power source in plant · CPC title

• H01M4/801 Primary

  Sintered carriers · CPC title

• H01M10/36

  Accumulators not provided for in groups H01M10/05-H01M10/34 · CPC title