KR-102960772-B1 - LAMINATED BATTERY, AND MANUFACTURING METHOD OF LAMINATED BATTERY

KR102960772B1KR 102960772 B1KR102960772 B1KR 102960772B1KR-102960772-B1

Abstract

A laminated battery having an electrode body and a laminate film that covers and encloses the electrode body, wherein the laminate film has a fused portion in which the inner surface is fused by overlapping the ends, and the fused portion has two bending portions that are bent into an angle or arc shape at an angle of 90° or less, and a roll portion that is arranged on the leading edge side of the fused portion and is rounded in a roll shape.

Inventors

치하라 마사시
가키시타 겐이치
기토 스미코

Assignees

도요타지도샤가부시키가이샤

Dates

Publication Date: 20260507
Application Date: 20240528
Priority Date: 20230727

Claims (5)

Electrode body and, having a laminate film that covers and encloses the above electrode body, The above laminate film has a fused portion in which the inner surface is fused by overlapping the ends, and A laminated battery having two bending portions that are bent into an angle of 50° or more and 74° or less, and a roll portion that is rounded into a roll shape and positioned at the leading edge of the fusion portion relative to the two bending portions.
In paragraph 1, A laminated battery having an angle of 60° or more of the above-mentioned bending portion.
In paragraph 1 or 2, A laminated battery in which the height of the fused portion in the thickness direction of the electrode body is less than or equal to the thickness of the portion having the electrode body in the laminated battery.
Electrode body and, having a laminate film that covers and encloses the above electrode body, A method for manufacturing a laminate-type battery having a fused portion in which the inner surface is fused by overlapping the ends of the laminate films above. A roll process for rounding the fused portion into a roll shape from the leading edge, and A method for manufacturing a laminated battery having a press process in which a press member is pressed against a rounded fused portion from at least two directions, and the portion is bent into an angle of 50° or more and 74° or less to form two bending portions.
In paragraph 4, A method for manufacturing a laminated battery, wherein the above-described press process is a process of pressing the press member by pressing it from three directions.

Description

Laminated Battery and Manufacturing Method of Laminated Battery The present disclosure relates to a laminated battery and a method for manufacturing a laminated battery. In a laminate-type battery in which an electrode body is covered by a laminate film, a portion of the laminate film is fused to form a fused portion in order to encapsulate the electrode body. For example, Japanese Patent Publication No. 2019-200973 discloses a method for manufacturing a secondary battery having a bending portion at at least one end of an outer body that has undergone laminate processing, comprising a step of bringing a pressing plate into contact with the starting point of the bending of the end of the outer body, and, after the step of bringing it into contact, a step of sliding a pressing plate and a pressure plate positioned opposite the pressing plate so as to be inserted with the end between them, thereby forming a bending portion by bending the end around the starting point and supporting the end by fitting the pressing plate and the pressure plate, wherein the end of the pressure plate and the surface of the surface of the surface of the surface of the pressure plate that slides together have an inclined surface that performs the bending of the end and a supporting surface that supports the end, wherein the inclined surface is inclined such that the cross-sectional area of the pressure plate narrows in the direction of sliding, and the inclined surface is inclined in the said width direction. The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, wherein similar numbers in the drawings indicate similar elements, and where: FIG. 1 is a schematic cross-sectional view illustrating a laminated battery according to an embodiment of the present disclosure; FIG. 2 is a schematic cross-sectional view illustrating one process of a method for manufacturing a laminated battery according to an embodiment of the present disclosure; FIG. 3 is a schematic cross-sectional view illustrating one process of a method for manufacturing a laminated battery according to an embodiment of the present disclosure; FIG. 4 is a schematic top view and a schematic cross-sectional view illustrating a roll process in a method for manufacturing a laminated battery according to an embodiment of the present disclosure; FIG. 5 is a schematic cross-sectional view illustrating one process of a method for manufacturing a laminated battery according to an embodiment of the present disclosure; Figure 6 is a schematic cross-sectional view showing an example of a solid-state battery. Laminated battery A laminated battery according to an embodiment of the present disclosure comprises an electrode body and a laminate film that covers and encloses the electrode body. The laminate film has a fused portion in which the inner surface is fused by overlapping the ends. The fused portion has two bending portions that are bent into an angle or arc shape at an angle of 90° or less, and a roll portion that is arranged on the leading edge side of the fused portion and rounded into a roll shape. Hereinafter, an embodiment of a laminated battery according to an embodiment of the present disclosure will be described with reference to the drawings. Each drawing shown below is schematic, and the size and shape of each part are appropriately exaggerated to facilitate understanding. FIG. 1 is a schematic cross-sectional view illustrating a laminated battery according to an embodiment of the present disclosure. The laminated battery (10) illustrated in FIG. 1 has an electrode body (2) and a laminate film (4) that covers and encloses the electrode body (2). The laminate film (4) has a fused portion (40) in which the inner surface is fused by overlapping the ends. The fused portion (40) has two bending portions (40A, 40B) that are bent into an angle or arc shape at an angle of 90° or less, and a roll portion (40C) that is arranged on the leading edge (40D) of the fused portion (40) and rounded into a roll shape. The roll portion (40C) is rounded in a roll shape toward the inner direction of the fusion portion (40) having two bending portions (40A, 40B) (i.e., the direction of the side that is at an angle of 90° or less in the two bending portions (40A, 40B)). Also, the term "roll portion" refers to a continuous curved shape. A laminated battery according to an embodiment of the present disclosure can increase structural efficiency in the fused portion while also suppressing the occurrence of rupture in the laminated film by having the above configuration. First, the laminated battery according to the embodiment of the present disclosure has a roll portion rounded in a roll shape on the leading edge of the fusion portion, so space can be saved and structural efficiency in the fusion portion can be increased. In addition, since the laminated battery has