Method for manufacturing secondary battery

Patent metadata

Field	Value
Publication number	US-10637092-B2
Application number	US-201515509535-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Sep 18, 2014
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A method for manufacturing a secondary battery having a film package by covering upper and lower sides of a laminate structure constituting a battery with a pair of film materials respectively and bonding the film materials together sequentially in a process direction from one end of the film materials to the other, the method including overlapping the film materials such that the laminate structure is sandwiched therebetween, and sealing one end of the overlapping part of the films, the one end being located at an upstream of the process direction, and bonding the overlapped film materials together at one or each of side portions thereof extending along the process direction sequentially in the process direction, while pressing a middle portion of the overlapped film materials sequentially in the process direction to thereby degas an internal space between the film materials, the middle portion being located between the side portions.

First claim

The invention claimed is:

1. A method for manufacturing a secondary battery having a film package by covering upper and lower sides of a laminate structure constituting a battery with a pair of film materials respectively and bonding the pair of film materials together sequentially in a process direction from one end of the pair of film materials to the other, the method comprising:
overlapping the pair of film materials such that the laminate structure is sandwiched therebetween, and sealing one end of an overlapping part of the overlapped pair of film materials, the one end being located at an upstream of the process direction,
bonding the overlapped pair of film materials together at one or each of side portions thereof extending along the process direction sequentially in the process direction, while pressing a middle portion of the overlapped pair of film materials sequentially in the process direction to thereby degas an internal space between the overlapped pair of film materials, the middle portion being located between each of the side portions, and
providing the laminate structure with a terminal that protrudes from one of the side portions in a length direction of the terminal, and wherein
the process direction is perpendicular to the length direction of the terminal, and
wherein the side portions are bonded in advance of pressing the middle portion as viewed with respect to a position corresponding to a single straight line orthogonal to the process direction.

2. The method according to claim 1 , wherein a plurality of embossed portions are formed on at least one of the pair of film materials, and a portion corresponding to the internal space between the pair of film materials is surrounded by the plurality of embossed portions and hypothetical lines connecting the plurality of embossed portions.

3. The method according to claim 1 , further comprising, prior to sealing one end of the overlapping part of the overlapped pair of film materials, continuously or intermittently sending out the overlapped pair of film materials which are in a strip form while maintaining the overlapped pair of film materials facing each other, and
feeding the sent-out overlapped pair of film materials, wherein sealing one end of the overlapping part of the overlapped pair of film materials and bonding the overlapped pair of film materials together are repeated in accordance with the sending-out of the strip-formed overlapped pair of film materials to thereby continuously or intermittently manufacture the secondary battery having a film package.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Ogawa Hiroshi
• Nogami Mitsuhide

Classifications

• H01M10/0413 Primary

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• B65B51/22

  by friction or ultrasonic or high-frequency electrical means · CPC title

• B65B31/00

  Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers · CPC title

• B65B9/02

  Enclosing successive articles, or quantities of material between opposed webs · CPC title

• H01M10/04 Primary

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title