Electricity storage device and insulating holder

Patent metadata

Field	Value
Publication number	US-2022407166-A1
Application number	US-202017777859-A
Country	US
Kind code	A1
Filing date	Nov 12, 2020
Priority date	Nov 20, 2019
Publication date	Dec 22, 2022
Grant date	—

Abstract

An electricity storage device includes: an electrode body including at least one positive electrode plate, at least one negative electrode plate, and a separator. an insulating holder that is formed by folding a sheet made of an insulating material and accommodates therein the electrode body; an outer case which has an opening and accommodates therein the electrode body with the insulating holder and an electrolyte; and a sealing plate. The outer case has a bottom plate part and a plurality of side walls standing from the bottom plate part, and the opening is formed in a position to face the bottom plate part. The insulating holder has a plurality of side surface parts respectively facing the plurality of side walls, and a bottom surface part that faces the bottom plate part. At least one of the side surface parts or the bottom surface part has a bellow-folded structure.

First claim

1 . An electricity storage device, comprising:
an electrode body including at least one positive electrode plate, at least one negative electrode plate, and a separator interposed between the at least one positive electrode plate and the at least one negative electrode plate being stacked. an insulating holder that is formed by folding a sheet made of an insulating material and accommodates therein the electrode body; an outer case which has an opening and accommodates therein the electrode body with the insulating holder and an electrolyte; and a sealing plate that seals the opening, wherein the outer case has a bottom plate part and a plurality of side walls standing from the bottom plate part, and the opening is formed in a position to face the bottom plate part, the insulating holder has a plurality of side surface parts respectively facing the plurality of side walls, and a bottom surface part that faces the bottom plate part, and at least one of the side surface parts or the bottom surface part has a bellow-folded structure.

2 . The electricity storage device of claim 1 , wherein the bottom surface part has the bellow-folded structure.

3 . The electricity storage device of claim 1 , wherein mountains in the bellow-folded structure count two or more but not more than eight.

4 . The electricity storage device of claim 1 , wherein a portion of the sheet having the bellow-folded structure has a plurality of holes.

5 . The electricity storage device of claim 4 , wherein
in two regions of the sheet having the bellow-folded structure, which regions face each other when the sheet is folded, each of the holes formed in one of the regions faces a portion of the other region having no hole.

6 . An insulating holder formed by folding a sheet made of an insulating material, comprising:
a bottom surface part; and a plurality of side surface parts standing from the bottom surface part, wherein at least one of the side surface parts or the bottom surface part has a bellow-folded structure.

Assignees

• Sanyo Electric Co

Inventors

• Maeda Hitoshi
• Okada Mitsuhiro
• Takabayashi Hiroshi

Classifications

• H01M50/593

  Spacers; Insulating plates · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• Y02P70/50

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

• H01G11/82 Primary

  Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title