Patent ID: 11973180
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 17:
18. A battery comprising:
an exterior body;
a stack in the exterior body; and
an ionic liquid in the exterior body,
wherein the exterior body has a film-like form and is folded in half with the stack between facing portions of the exterior body,
wherein the exterior body includes a pair of first portions and a second portion,
wherein the pair of first portions overlaps with each other,
wherein each of the first portions includes a portion overlapping with the stack,
wherein the second portion is a folded portion located between the pair of first portions,
wherein in an area surrounded by the exterior body, the stack and the second portion are not in contact with each other but there is a space between the stack and the second portion,
wherein each of the first portions has a wave shape in which a plurality of crest lines and a plurality of trough lines are parallel to each other and alternately located,
wherein the pair of first portions of the exterior body includes a region in which the crest lines of one first portion do not overlap with the trough lines of the other first portion,
wherein the stack comprises a first positive electrode current collector and a second positive electrode current collector,
wherein a first positive electrode active material layer is provided on a first surface of the first positive electrode current collector,
wherein a second positive electrode active material layer is provided on a first surface of the second positive electrode current collector, and
wherein a second surface of the first positive electrode current collector is in contact with a second surface of the second positive electrode current collector.