Power storage device and electronic device

Patent metadata

Field	Value
Publication number	US-11075387-B2
Application number	US-201615015374-A
Country	US
Kind code	B2
Filing date	Feb 4, 2016
Priority date	Feb 12, 2015
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A power storage device having flexibility is provided. A power storage device of which the capacity is not likely to deteriorate even when being curved is provided. A power storage device includes a first electrode, a second electrode, and an electrolytic solution. The first electrode and the second electrode overlap with each other. The first electrode includes a first current collector and a first active material layer. The first current collector has a first surface and a second surface. The first active material layer is provided on the first surface. The first current collector has a first bent portion with the second surface inside. The second surface includes a first region and a second region. The first region overlaps with the second region. The first region is connected to the second region at a portion different from the first bent portion.

First claim

What is claimed is:

1. A power storage device comprising:
a first electrode;
a second electrode; and
an electrolytic solution,
wherein the first electrode and the second electrode overlap with each other,
wherein the first electrode includes a first current collector and a first active material layer,
wherein the first current collector includes a first surface and a second surface opposite to the first surface,
wherein the first surface includes a first region, a second region, and a third region,
wherein the first active material layer is in direct contact with the first region of the first surface,
wherein the first current collector includes a first bent portion with the first surface inside,
wherein the second region is in direct contact with the third region at the first bent portion,
wherein the first current collector includes a second bent portion with the second surface inside,
wherein the second surface includes a fourth region and a fifth region,
wherein the fourth region faces the fifth region,
wherein the fourth region is in direct contact with the fifth region at a portion different from the second bent portion, and
wherein the second region, the third region, the fourth region, and the fifth region overlap with each other.

2. The power storage device according to claim 1 ,
wherein the first active material layer is not provided on the first bent portion.

3. The power storage device according to claim 2 ,
wherein the second electrode includes a second current collector and a second active material layer,
wherein the second current collector includes a third bent portion, and
wherein the third bent portion is substantially parallel to the second bent portion.

4. The power storage device according to claim 1 ,
wherein the first electrode is one of a positive electrode and a negative electrode, and
wherein the second electrode is the other one of the positive electrode and the negative electrode.

5. The power storage device according to claim 1 , further comprising an exterior body surrounding the first electrode, the second electrode, and the electrolytic solution,
wherein the exterior body includes a film.

6. The power storage device according to claim 1 , wherein the electrolytic solution is a gel.

7. The power storage device according to claim 1 ,
wherein the first electrode includes a friction layer, and
wherein the friction layer is provided on the second surface.

8. The power storage device according to claim 1 , wherein the power storage device is flexible.

9. The power storage device according to claim 1 , wherein the power storage device is curved.

10. An electronic device comprising the power storage device according to claim 1 , and a housing which is flexible.

11. An electronic device comprising the power storage device according to claim 1 and a housing which includes a curved portion.

Assignees

• Semiconductor Energy Lab

Inventors

• Tajima Ryota
• Momo Junpei

Classifications

• H01M50/566

  by welding, soldering or brazing · CPC title

• H01M50/548

  on opposite sides of the cell · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/126

  comprising three or more layers · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title