Power storage device and power storage system

Patent metadata

Field	Value
Publication number	US-2017244135-A1
Application number	US-201715432337-A
Country	US
Kind code	A1
Filing date	Feb 14, 2017
Priority date	Feb 19, 2016
Publication date	Aug 24, 2017
Grant date	—

Abstract

A power storage system or a power storage device that can restore reduced capacity is provided. The power storage device includes a first exterior body, a first electrode, a second electrode, a first electrolyte solution, and a carrier ion permeable film. The first electrode, the second electrode, and the first electrolyte solution are covered with the first exterior body. The first electrode and the second electrode are in contact with the first electrolyte solution. The first electrolyte solution includes carrier ions. A first opening is provided in the first exterior body. The carrier ion permeable film is provided to be in contact with the first electrolyte solution and so as to block the first opening without any space. The carrier ion permeable film is configured to be impermeable to water and air but permeable to the carrier ions.

First claim

What is claimed is:

1 . A power storage device comprising:
a first electrode and a second electrode; a first electrolyte solution including carrier ions; a carrier ion permeable film; and a first exterior body having a first opening and covering the first electrode, the second electrode, and the first electrolyte solution, wherein: part of the first electrode and the second electrode are exposed from the first exterior body, the first electrode and the second electrode are in contact with the first electrolyte solution, the carrier ion permeable film is in contact with the first electrolyte solution, and is provided to block the first opening without any space, and the carrier ion permeable film is configured to be impermeable to water and air but permeable to the carrier ions.

2 . The power storage device according to claim 1 , wherein the carrier ions contain a lithium ion.

3 . A power storage system comprising:
the power storage device according to claim 1 ; and a capacity restoration device comprising:
a third electrode;
a second electrolyte solution including the carrier ions; and
a second exterior body having a second opening and covering the third electrode and the second electrolyte solution,
wherein: part of the third electrode is exposed from the second exterior body, the second opening is connected to the first opening, and the second electrolyte solution is in contact with the carrier ion permeable film and the third electrode.

4 . The power storage system according to claim 3 , wherein a solvent of the second electrolyte solution is water.

5 . The power storage system according to claim 3 , wherein the capacity restoration device further comprises an electrolyte including the carrier ions inside the second exterior body.

6 . The power storage system according to claim 3 , further comprising:
an ion conducting portion having flexibility; a charger; and a cable, wherein: the ion conducting portion is connected to the first opening and the second opening without any space, and the charger is electrically connected to the first electrode and the third electrode through the cable.

7 . The power storage system according to claim 6 , further comprising a pump connected to the ion conducting portion.

8 . The power storage system according to claim 6 , further comprising an air vent in the ion conducting portion.

9 . A power storage system comprising:
a first power storage device and a second power storage device each comprising:
a first electrode and a second electrode;
a first electrolyte solution;
a carrier ion permeable film; and
a first exterior body having a first opening;
a capacity restoration device comprising:
a third electrode;
a second electrolyte solution; and
a second exterior body having a second opening;
an ion conducting portion comprising:
a pump connected to the ion conducting portion; and
an air vent in the ion conducting portion;
a charger; and a cable, wherein: the ion conducting portion is connected to the first opening of the first power storage device, the first opening of the second power storage device, and the second opening without any space, and the charger is electrically connected to the first electrode of the first power storage device, the first electrode of the second power storage device, and the third electrode through the cable.

10 . A method for restoring capacity of a power storage device using a power storage system:
the power storage system comprising:
the power storage device comprising:
a first electrode and a second electrode;
a first electrolyte solution;
a carrier ion permeable film; and
a first exterior body having a first opening; and

a capacity restoration device comprising:
a third electrode; and
a second exterior body having a second opening,

the method comprising:
connecting the capacity restoration device to the power storage device through the first opening and the second opening;
injecting a second electrolyte solution including carrier ions into the capacity restoration device; and
applying voltage between the first electrode and the third electrode,
wherein: the second electrolyte solution is in contact with the carrier ion permeable film and the third electrode after injecting, and current flows from the first electrode to the third electrode in applying voltage.

11 . A method for restoring capacity of a power storage device using a power storage system:
the power storage system comprising:
the power storage device comprising:
a first electrode and a second electrode;
a first electrolyte solution;
a carrier ion permeable film; and
a first exterior body having a first opening; and

a capacity restoration device comprising:
a third electrode;
an electrolyte including carrier ions; and
a second exterior body having a second opening,

the method comprising:
connecting the capacity restoration device to the power storage device through the first opening and the second opening;
injecting a solvent into the capacity restoration device to form a second electrolyte solution; and
applying voltage between the first electrode and the third electrode,
wherein: the second electrolyte solution is in contact with the carrier ion permeable film and the third electrode after injecting, and current flows from the first electrode to the third electrode in applying voltage.

Assignees

• Semiconductor Energy Lab

Inventors

• Momo Junpei

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H01M10/0583

  of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators · CPC title

• H01M10/46

  Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title