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US 2025/0030040 A1Published application
Battery and method for manufacturing battery
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsMinoru TAKAHASHI, Ryota TAJIMA
Life of this patent
Estimating the term…
Abstract
A battery capable of changing its form safely is provided. A bendable battery having a larger thickness is provided. A battery with increased capacity is provided. For an exterior body of the battery, a film in the shape of a periodic wave in one direction is used. A space is provided in an area surrounded by the exterior body and between an end portion of the electrode stack that is not fixed and an interior wall of the exterior body. Furthermore, the phases of waves of a pair of portions of the exterior body between which the electrode stack is located are different from each other. In particular, the phases are different from each other by 180 degrees so that wave crest lines overlap with each other and wave trough lines overlap with each other.
Claims22
(canceled)
A head-mounted display comprising a flexible battery:
- wherein the flexible battery comprises 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, a second portion, a pair of third portions, and a fourth portion,
- wherein the pair of first portions overlaps with each other,
- wherein each of the first portion is surrounded by the second portion, the pair of third portions, and the fourth portion and includes a portion overlapping with the stack,
- wherein the second portion is a folded portion located between the pair of first portions,
- wherein the pair of third portions is belt-like portions located opposite to each other with each of the first portions therebetween and extending in a direction intersecting with the second portion,
- wherein the fourth portion is a belt-like portion located opposite to the second portion with the first portion therebetween,
- wherein the exterior body is bonded in the third portions and the fourth 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.
10 more elements
An electronic device comprising a display portion and a flexible battery:
- wherein the display portion has a curved surface,
- wherein the flexible battery has a curved portion along the curved surface of the display portion,
- wherein the flexible battery comprises 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, a second portion, a pair of third portions, and a fourth portion,
- wherein the pair of first portions overlaps with each other,
- wherein each of the first portion is surrounded by the second portion, the pair of third portions, and the fourth portion and includes a portion overlapping with the stack,
- wherein the second portion is a folded portion located between the pair of first portions,
- wherein the pair of third portions is belt-like portions located opposite to each other with each of the first portions therebetween and extending in a direction intersecting with the second portion,
- wherein the fourth portion is a belt-like portion located opposite to the second portion with the first portion therebetween,
- wherein the exterior body is bonded in the third portions and the fourth 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.
12 more elements
An electronic device comprising a display portion and a flexible battery:
- wherein the display portion has a curved surface,
- wherein the flexible battery has a curved portion along the curved surface of the display portion,
- wherein the flexible battery comprises 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, a second portion, a pair of third portions, and a fourth portion,
- wherein the pair of first portions overlaps with each other,
- wherein each of the first portion is surrounded by the second portion, the pair of third portions, and the fourth portion and includes a portion overlapping with the stack,
- wherein the second portion is a folded portion located between the pair of first portions,
- wherein the pair of third portions is belt-like portions located opposite to each other with each of the first portions therebetween and extending in a direction intersecting with the second portion,
- wherein the fourth portion is a belt-like portion located opposite to the second portion with the first portion therebetween,
- wherein the exterior body is bonded in the third portions and the fourth portion,
- wherein each of the first portion includes a plurality of projections and depressions,
- 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.
13 more elements
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, a second portion, a pair of third portions, and a fourth portion,
- wherein the pair of first portions overlaps with each other,
- wherein each of the first portion is surrounded by the second portion, the pair of third portions, and the fourth portion and includes a portion overlapping with the stack,
- wherein the second portion is a folded portion located between the pair of first portions,
- wherein the pair of third portions is belt-like portions located opposite to each other with each of the first portions therebetween and extending in a direction intersecting with the second portion,
- wherein the fourth portion is a belt-like portion located opposite to the second portion with the first portion therebetween,
- wherein the exterior body is bonded in the third portions and the fourth portion,
- wherein each of the first portion includes a plurality of projections and depressions,
- wherein the stack comprises a first positive electrode current collector, a second positive electrode current collector, and a negative 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.
14 more elements
Dependencies are inferred from the claim text.