# US 2025/0096281 A1 · Electrode, secondary battery, battery pack, vehicle, and stationary power supply

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2025/0096281 A1
- Document ID: US20250096281A1
- Status: Published application
- Kind: A1
- Application number: 18/777,156
- Filed: 2024-07-18
- Published: 2025-03-20
- Earliest claimed: 2023-09-20
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Yasunobu YAMASHITA; Keigo HOSHINA
- Web page: https://patentgrep.com/patent/US20250096281A1

## CPC

- H01M 4/801: {Sintered carriers}
- B60L 50/64: Constructional details of batteries specially adapted for electric vehicles
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/806: {Nonwoven fibrous fabric containing only fibres}
- H01M 10/36: Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- H01M 2220/10: Batteries in stationary systems, e.g. emergency power source in plant
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 7)

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

### Claim 9 (depends on 8)

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

### Claim 10 (depends on 8)

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.

### Claim 11 (depends on 8)

A vehicle comprising the battery pack according to claim 8.

### Claim 12 (depends on 11)

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

### Claim 13 (depends on 8)

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