Method of manufacturing sealed battery

Patent metadata

Field	Value
Publication number	US-2017077544-A1
Application number	US-201615264018-A
Country	US
Kind code	A1
Filing date	Sep 13, 2016
Priority date	Sep 16, 2015
Publication date	Mar 16, 2017
Grant date	—

Abstract

A method of manufacturing a sealed battery includes a welding step of forming a welded portion, and the welding step includes a first step of sequentially forming a plurality of weld beads in an opening edge portion and an outer peripheral edge portion such that the plurality of weld beads are spaced apart from one another, and a second step of forming a weld bead in each gap portion located between the weld beads, with a plurality of gap portions being formed in the opening edge portion and the outer peripheral edge portion.

First claim

What is claimed is:

1 . A method of manufacturing a sealed battery including a case formed by welding a lid and a case body having an opening with a laser beam, and an electrode body housed in the case, the method comprising:
arranging the lid in the opening of the case body; and forming a welded portion connecting an opening edge portion of the case body and an outer peripheral edge portion of the lid, forming the welded portion including: sequentially forming a plurality of first weld beads in the opening edge portion and the outer peripheral edge portion such that the plurality of first weld beads are spaced apart from one another; and forming a second weld bead in each gap portion located between the first weld beads, with a plurality of gap portions being formed in the opening edge portion and the outer peripheral edge portion.

2 . The method of manufacturing a sealed battery according to claim 1 , wherein
forming the second weld bead is repeatedly performed until each of the gap portions is filled with the second weld bead.

3 . The method of manufacturing a sealed battery according to claim 1 , wherein
lengths of the first weld bead and the second weld bead are set to be within a range of equal to or longer than 2 mm and equal to or shorter than 12 mm, and when the lengths of the first weld bead and the second weld bead are set to be within a range of longer than 8 mm and equal to or shorter than 12 mm, the lengths of the first weld bead and the second weld bead are set to become shorter as a processing speed becomes lower.

4 . The method of manufacturing a sealed battery according to claim 1 , wherein
the laser beam is output from a laser welding device, and the laser welding device forms the first weld bead by emitting the laser beam to a position on the case body apart from the opening edge portion or a position on the lid apart from the outer peripheral edge portion, and then, moving a position irradiated with the laser beam toward the opening edge portion and the outer peripheral edge portion, and moving the irradiated position on the opening edge portion and on the outer peripheral edge portion when the irradiated position reaches the opening edge portion and the outer peripheral edge portion.

Assignees

• Toyota Motor Co Ltd

Inventors

• Umeyama Hiroya
• Takamatsu Hiroshi
• Imanishi Hiroaki

Classifications

• H01M10/0431

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

• H01M10/0404

  Machines for assembling batteries · CPC title

• B23K2101/36

  Electric or electronic devices · CPC title

• B23K26/206 Primary

  Laser sealing · CPC title

• B23K26/24 Primary

  Seam welding · CPC title