US 8,574,746 B2 · Film-covered electrical device and assembled battery

Abstract

The film-covered electrical device of the present invention includes covered portion (S1) where a portion of covering film (6) is folded to cover end surface (5d) of covering film (5) through which metal layer (5b) is exposed, non-covered portion (S2) where end surface (5d) of covering film (5) is not covered with folded covering film (6), sealing portion (8) (a first sealing portion) produced by thermally fusing thermally-fusible resin layer (6c) of covering film (6) and thermally-fusible resin layer (5c) of covering film (5), and portion B (a second sealing portion) produced by thermally fusing protective layer (5a) of covering film (5) and thermally-fusible resin layer (6c) of covering film (6), wherein sealing portion (8) (the first sealing portion and non-covered portion (S2)) is provided with a safety valve for releasing internal gas when a rise in internal pressure occurs.

Claims20

Dependent claims

A film-covered electrical device, comprising:

an electrical device element formed by laminating a plurality of positive electrode plates and a plurality of negative electrode plates in an opposed condition;
and
a covering film having a metal layer, a resin layer having thermal fusion properties and which is provided on one surface of the metal layer and a protective layer provided on another surface of the metal layer,
wherein the electrical device-element is housed in a space formed by thermally fusing edge portions of the covering film to each other, one side of a peripheral edge portion of the covering film comprises both a folded region having a folded portion and a non-folded region not having the folded portion, and the folded portion is positioned in a direction in which the folded portion departs more from the electrical device element than from an end surface of the covering film in the non-folded region.

1 more element

A film-covered electrical device, comprising:

an electrical device element formed by laminating a plurality of positive electrode plates and a plurality of negative electrode plates in an opposed condition;
and
a covering film having a metal layer, a resin layer having thermal fusion properties and which is provided on one surface of the metal layer and a protective layer provided on another surface of the metal layer,
wherein the electrical device-element is housed in a space formed by thermally fusing edge portions of the covering film to each other, one side of peripheral edge portions of the covering film comprises both a folded region having a folded portion and a non-folded region not having the folded portion, and the resin layers in the folded portion of the covering film are thermally fused to each other.

1 more element

Dependencies are inferred from the claim text.

Film-covered electrical device and assembled battery

Life of this patent

Film-covered electrical device and assembled battery

Life of this patent

Abstract

Claims20