Battery and method of manufacturing battery

Patent metadata

Field	Value
Publication number	US-2026058335-A1
Application number	US-202519269755-A
Country	US
Kind code	A1
Filing date	Jul 15, 2025
Priority date	Aug 20, 2024
Publication date	Feb 26, 2026
Grant date	—

Abstract

A battery includes: an electrode body configured by laminating a positive electrode current collector, a negative electrode current collector, a positive electrode foil that extends from the positive electrode current collector, and a negative electrode foil that extends from the negative electrode current collector; a first foil collection portion at which one of the positive electrode foil or the negative electrode foil is collected into one; a second foil collection portion at which another of the positive electrode foil or the negative electrode foil is divided into more than one and collected; a first terminal to which the first foil collection portion is joined; and a second terminal to which the second foil collection portion is joined.

First claim

What is claimed is:

1 . A battery, comprising:
an electrode body configured by laminating a positive electrode current collector, a negative electrode current collector, a positive electrode foil that extends from the positive electrode current collector, and a negative electrode foil that extends from the negative electrode current collector; a first foil collection portion at which one of the positive electrode foil or the negative electrode foil is collected into one; a second foil collection portion at which another of the positive electrode foil or the negative electrode foil is divided into more than one and collected; a first terminal to which the first foil collection portion is joined; and a second terminal to which the second foil collection portion is joined.

2 . The battery according to claim 1 , wherein:
the first terminal is provided at one end side of the electrode body; and the second terminal is provided at another end side of the electrode body.

3 . The battery according to claim 2 , wherein:
a distance from another end portion of the electrode body to the second terminal is less than a distance from one end portion of the electrode body to the first terminal.

4 . The battery according to claim 1 , wherein a number of foils collected at the second foil collection portion is greater than a number of foils collected at the first foil collection portion.

5 . The battery according to claim 1 , wherein the first foil collection portion is bent at a vicinity of one corner portion of the electrode body and is joined to the first terminal.

6 . The battery according to claim 5 , wherein:
the first foil collection portion is joined to the first terminal at one location; and the second foil collection portion is joined to the second terminal at a plurality of locations.

7 . The battery according to claim 1 , further comprising:
a case that houses the electrode body; a first external terminal that is provided at the case and that is electrically connected to the first terminal; and a second external terminal that is provided at the case and that is electrically connected to the second terminal.

8 . A method of manufacturing a battery that comprises an electrode body configured by laminating a positive electrode current collector, a negative electrode current collector, a positive electrode foil that extends from the positive electrode current collector, and a negative electrode foil that extends from the negative electrode current collector, the method comprising:
collecting one of the positive electrode foil or the negative electrode foil into one, and joining the one of the positive electrode foil or the negative electrode foil to a first terminal that is arranged at one end side of the electrode body; and dividing another of the positive electrode foil or the negative electrode foil into more than one and collecting foils, and joining the other of the positive electrode foil or the negative electrode foil to a second terminal that is arranged at another end side of the electrode body.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kagami Ryo
• Ose Norihiro
• Kakishita Kenichi

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/3425

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/548

  on opposite sides of the cell · CPC title