POWER STORAGE DEVICE EXTERIOR CASE AND PRODUCTION METHOD THEREFOR

Title:

POWER STORAGE DEVICE EXTERIOR CASE AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2018/097054

Kind Code:

A1

Abstract:

Provided is a power storage device exterior case whereby a large distortion focused on a trihedral angular portion can be suppressed sufficiently, the occurrence of a wrinkle or a crack can be suppressed, and strength can be secured sufficiently. The invention has a configuration comprising: a housing case 2 shaped as an approximately polygonal column and having an open bottom surface; and a flanged portion extending outward in an approximately horizontal direction from the peripheral border of the opening at the housing case bottom surface. Adjacent side walls 11 constituting the housing case are joined by a corner wall portion 4 disposed therebetween and having a curved surface. Each edge of a ceiling wall 12 constituting the housing case is joined to an upper edge 11a of the corresponding side wall through a ridge line portion 5 having a curved surface, each corner border 12b of the ceiling wall 12 is joined to an upper border 4a of the corresponding corner wall portion 4 through a corner summit portion 6 provided with a curved surface. The configuration has the relationship: curvature radius R1 of the ridge line portion 5 < curvature radius R2 of the angle summit portion 6 in a vertical cross section.

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Inventors:

MINAMIBORI YUUJI (JP)
YAMANISHI YOSHIHIKO (JP)
ITO YOSHINORI (JP)

Application Number:

PCT/JP2017/041443

Publication Date:

May 31, 2018

Filing Date:

November 17, 2017

Export Citation:

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Assignee:

SHOWA DENKO PACKAGING CO LTD (JP)
SHOWA DENKO KK (JP)

International Classes:

B21D19/00; B21D22/20; B21D22/22; B21D24/00; B21D51/26; B21D53/00; H01G9/08; H01G11/78; H01G11/84; H01M50/103

Foreign References:

JP2005294212A	2005-10-20
JP2016502238A	2016-01-21
JP2013154389A	2013-08-15
JP2002208384A	2002-07-26

Attorney, Agent or Firm:

SHIMIZU Yoshihito et al. (JP)

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