Method for manufacturing angular battery, and angular battery

Patent metadata

Field	Value
Publication number	US-12148936-B2
Application number	US-202117386991-A
Country	US
Kind code	B2
Filing date	Jul 28, 2021
Priority date	Aug 12, 2020
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

The present disclosure provides a method for manufacturing an angular battery having improved insertability of an electrode body. According to the present disclosure, there is provided a method for manufacturing an angular battery including a battery case that has a rectangular bottom surface and a pair of long side surfaces having, as one side thereof, a long side of the rectangular bottom surface and facing each other, and an electrode body that is accommodated in the battery case and wide surfaces facing the long side surfaces. The manufacturing method includes a preparation step of preparing a first member having substantially U-shaped end faces including the bottom surface and the pair of long side surfaces extending from the bottom surface, and a second member and a third member that are to be joined to respective end faces of the first member and constitute short side surfaces; a sandwiching step of sandwiching the wide surfaces of the battery body between the pair of long side surfaces of the first member; and a joining step of joining the second and third members to the respective end faces of the first member in a state in which the electrode body is sandwiched by the pair of long side surfaces.

First claim

What is claimed is:

1. A method for manufacturing an angular battery including a battery case that has a rectangular bottom surface, a pair of rectangular long side surfaces having, as one side thereof, a long side of the rectangular bottom surface and facing each other, and a pair of short side surfaces having, as one side thereof, a short side of the rectangular bottom surface and facing each other; and an electrode body that is accommodated inside the battery case and has a pair of wide surfaces facing the rectangular long side surfaces, the manufacturing method including:
a preparation step of preparing a first member having substantially U-shaped end faces including the bottom surface and the pair of rectangular long side surfaces extending from the bottom surface, and a second member and a third member that are to be joined to respective end faces of the first member and constitute the short side surfaces, the members constituting the battery case;
a sandwiching step of sandwiching the wide surfaces of the electrode body between the pair of rectangular long side surfaces of the first member; and
a joining step of joining the second and third members to the respective end faces of the first member in a state in which the electrode body is sandwiched by the pair of rectangular long side surfaces, wherein
in the preparation step, the first member is prepared with the pair of rectangular long side surfaces inclined relative to each other along their entire respective lengths so that a distance between the rectangular long side surfaces becomes smaller as a distance from the bottom surface of the first member increases, and the second and third members constituting the short side surfaces are each prepared such that an entirety of each of the short side surfaces is shaped as a trapezoid, and
the joining step results in the battery case for the angular battery having a finished, trapezoidal outer shape with the trapezoid-shaped short side surfaces fixing the pair of rectangular long side surfaces at an inclined angle relative to each other with a greater distance between the rectangular long side surfaces at the bottom surface of the first member than a distance between the rectangular long side surfaces at an opposite top side of the first member.

2. The method for manufacturing an angular battery according to claim 1 , wherein in the sandwiching step, the pair of long side surfaces of the first member sandwich the wide surfaces of the electrode body with a sandwiching force of 15 N or more.

3. The method for manufacturing an angular battery according to claim 1 , wherein at least portions of the wide surfaces of the electrode body that are to be sandwiched between the pair of long side surfaces are covered with an insulating film, and the electrode body is sandwiched together with the insulating film between the pair of long side surfaces of the first member in the sandwiching step.

4. The method for manufacturing an angular battery according to claim 1 , wherein
the first member having substantially U-shaped end faces is made of a metal.

Assignees

• Prime Planet Energy & Solutions Inc

Inventors

• Shimura Yosuke
• Asadachi Hideki
• Funato Minehiro

Classifications

• H01M50/102 Primary

  characterised by their shape or physical structure · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M50/103 Primary

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

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title