Secondary battery

摘要

A secondary battery according to the present exemplary embodiment is a secondary battery including a laminated electrode body provided with at least one pair of positive and negative electrodes and an outer enclosure that accommodates the laminated electrode body, wherein the outer enclosure includes one or more concave portions, inside a border corresponding to an outer edge of an electrode surface of an outermost layer of the laminated electrode body, on a surface facing the electrode surface, and wherein, when a band-shaped outer circumferential region having an area that is a half of an area inside the border is set inside the border, at least one of the concave portions is located inside the outer circumferential region.

主权项

1. A secondary battery comprising:
a laminated electrode body provided with at least one pair of positive and negative electrodes, a non-aqueous electrolyte which is lithium salt as an electrolyte dissolved in a non-aqueous solvent, and an outer enclosure that accommodates the laminated electrode body and the non-aqueous electrolyte, wherein said outer enclosure comprises one or more concave portions, inside a border corresponding to an outer edge of an electrode surface of an outermost layer of said laminated electrode body, on a surface facing said electrode surface, wherein at least one of said concave portions is located inside a band-shaped outer circumferential region having an area that is a half of a total area encompassed by said border, said band-shaped outer circumferential region set inside said border, and wherein the ratio of the height of said concave portion to the thickness of said laminated electrode body is 1 to 17%, and wherein the outer enclosure is entirely sealed.