Power storage device and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-9368776-B2
Application number	US-201213729094-A
Country	US
Kind code	B2
Filing date	Dec 28, 2012
Priority date	Jun 28, 2010
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A power storage device having: a laminated body formed by providing a separator layer between a first electrode which is one of a cathode and an anode and a second electrode which is the other electrode; an electrolyte; and a package which houses the laminated body and the electrolyte. At least two first electrode composite sheets are included which are each obtained by integrating a first collector electrode, a first electrode active material layer provided on one principal surface of the first collector electrode, and a separator layer covering at least part of the one principal surface, and the other principal surface of the first collector electrode of one first electrode composite sheet out of the at least two first electrode composite sheets is opposed to, and bonded to, the other principal surface of the first collector electrode of the other first electrode composite sheet.

First claim

The invention claimed is:

1. A power storage device, comprising:
a laminated body having a first electrode and a second electrode;
an electrolyte; and
a package which houses the laminated body and the electrolyte,
wherein at least one of the first electrode and the second electrode include at least two first electrode composite sheets, each of the at least two first electrode composite sheets including a first collector electrode, a first electrode active material layer on a first surface of the first collector electrode, and a first separator layer covering at least part of the first surface of the first collector electrode, and
wherein, of the at least two first electrode composite sheets, respective second surfaces of each of the first collector electrodes are opposed to, and electrically bonded to, each other, the second surfaces being opposite the first surfaces.

2. The power storage device according to claim 1 , wherein the at least one of the first electrode and the second electrode further include a second electrode composite sheet comprising a second collector electrode, a second electrode active material layer on a second surface of the second collector electrode, and a second separator layer covering at least part of the second surface of the second collector electrode.

3. The power storage device according to claim 1 , wherein the at least one of the first electrode and the second electrode further include at least two second electrode composite sheets each comprising a second collector electrode, a second electrode active material layer on a second surface of the second collector electrode, and a second separator layer covering at least part of the second surface of the second collector electrode, wherein
of the at least two second electrode composite sheets, the respective second surfaces of each of the second collector electrodes are opposed to, and bonded to, each other.

4. The power storage device according to claim 2 , wherein one of the first separator layers of the two first electrode composite sheets and the second separator layer of the second electrode composite sheet are bonded to each other.

5. The power storage device according to claim 3 , wherein the one of the first separator layers of the two first electrode composite sheets and one of the second separator layers of one of the two second electrode composite sheets are bonded to each other.

6. The power storage device according to claim 1 , wherein the separator layer contains an inorganic filler.

Assignees

• Murata Manufacturing Co

Inventors

• Horikawa Keiji
• Ehara Yukio
• Itaya Masaharu
• Fukuda Yasutake
• Sawada Manabu
• Harada Hiroyuki
• Ueba Yuusuke
• Ueda Yasuhiko

Classifications

• H01G11/12 Primary

  Stacked hybrid or EDL capacitors · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/449

  having a layered structure · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title

• H01M6/40

  Printed batteries {, e.g. thin film batteries} · CPC title