Power storage device and electronic device

Patent metadata

Field	Value
Publication number	US-2016240325-A1
Application number	US-201615015374-A
Country	US
Kind code	A1
Filing date	Feb 4, 2016
Priority date	Feb 12, 2015
Publication date	Aug 18, 2016
Grant date	—

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 has a first surface and a second surface, wherein the first active material layer is provided on the first surface, wherein the first current collector has a first bent portion with the second surface inside, wherein the second surface includes a first region and a second region, wherein the first region overlaps with the second region, and wherein the first region is connected to the second region at a portion different from the first bent portion.

2 . The power storage device according to claim 1 ,
wherein the first current collector includes a second bent portion with the first surface inside, and wherein the first active material layer is not provided on the second 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 first 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, 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 has a curved portion.

12 . A power storage device comprising:
a first electrode; a second electrode; a first lead; a second lead; and an exterior body, wherein the first lead is electrically connected to the first electrode, wherein the second lead is electrically connected to the second electrode, wherein the exterior body has a first side, a second side, a third side, and a fourth side, wherein the first side is not adjacent to the second side, wherein the exterior body includes a bent portion, wherein the bent portion includes the first side and the second side, wherein the first electrode and the second electrode are surrounded by the exterior body, and wherein the first lead and the second lead overlap with the first side.

13 . The power storage device according to claim 12 ,
wherein when a length of the first side and a length of the third side are denoted by W and L, respectively, L is greater than or equal to W.

14 . The power storage device according to claim 12 ,
wherein the first electrode is one of a positive electrode and a negative electrode, wherein the second electrode is the other one of the positive electrode and the negative electrode.

15 . The power storage device according to claim 12 ,
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 has a first surface and a second surface, wherein the first active material layer is provided on the first surface, wherein the first current collector has a first bent portion with the second surface inside, wherein the second surface includes a first region and a second region, wherein the first region overlaps with the second region, and wherein the first region is connected to the second region at a portion different from the first bent portion.

16 . The power storage device according to claim 15 ,
wherein the first current collector includes a second bent portion with the first surface inside, and wherein the first active material layer is not provided on the second bent portion.

17 . The power storage device according to claim 12 , wherein the power storage device is flexible.

18 . The power storage device according to claim 12 , wherein the power storage device is curved.

19 . An electronic device comprising the power storage device according to claim 12 , and a housing which is flexible.

20 . An electronic device comprising the power storage device according to claim 12 and a housing which has 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