Electrical storage device element and electrical storage device

Patent metadata

Field	Value
Publication number	US-9728343-B2
Application number	US-201314141573-A
Country	US
Kind code	B2
Filing date	Dec 27, 2013
Priority date	Jun 28, 2011
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A highly-reliable electrical storage device element and electrical storage device, in each of which on predetermined regions of predetermined end surfaces of a laminate forming an electrical storage component, sprayed end surface electrodes each having a high bond strength to the laminate are provided.

First claim

The invention claimed is:

1. An electrical storage device element comprising:
a laminate having:
a first end surface,
a second end surface opposing the first end surface,
a plurality of positive electrode layers alternating with a plurality of negative electrode layers, each positive electrode layer including a positive electrode collector extending to the first end surface and a positive electrode active material disposed on a portion of the positive electrode collector, and each negative electrode layers including a negative electrode collector extending to the second end surface and a negative electrode active material disposed on a portion of the negative electrode collector,
a plurality of resin-containing insulating layers that insulate the plurality of positive electrode layers from the plurality of negative electrode layers, respectively; and

a pair of end surface electrodes adjacent to the first end surface and the second end surface, respectively,
wherein the positive electrode collectors have an average thickness x1 and an average distance y1 between adjacent positive electrode collectors, where:
0.2 μm≦ x 1≦2.0 μm,

10 μm≦ y 1≦30 μm,

y 1≧15 x 1−5, and

and
wherein the negative electrode collectors have an average thickness x2 and an average distance y2 between adjacent negative electrode collectors, where:
0.2 μm≦ x 2≦2.0 μm,

10 μm≦ y 2≦30 μm, and

y 2≧15 x 2−5 μm,

wherein each insulating layer between each of the adjacent positive electrode collectors has at least a portion that extends in the thickness direction directly between the adjacent positive electrode collectors, such that the respective portions of the insulating layers have an average thickness equal to y1.

2. The electrical storage device element according to claim 1 , wherein the plurality of positive electrode layers and the plurality of negative electrode layers are adhered to and integrated with each other by the resin-containing insulating layers.

3. The electrical storage device element according to claim 1 , wherein the resin-containing insulating layers each include a resin material having a glass transition temperature equal to or less than −20° C.

4. The electrical storage device element according to claim 1 , wherein the resin-containing insulating layers form a positive electrode extension region of the first end surface and a negative electrode extension region of the second end surface.

5. The electrical storage device element according to claim 4 , wherein the positive and negative electrode extension regions each include a plurality of concave portions.

6. The electrical storage device element according to claim 5 , wherein the positive electrode collectors and the negative electrode collectors are exposed to voids defined by the concave portions, respectively, to increase a contact area between the respective end surface electrodes and the positive electrode collectors the negative electrode collectors.

7. The electrical storage device element according to claim 5 , wherein the pair of end surface electrodes each have concave portions that conform to the positive electrode extension region having the concave portions and the negative electrode extension region having the concave portions, respectively.

8. The electrical storage device element according to claim 1 , wherein the plurality of resin-containing insulating layers are not disposed on the positive electrode active material and the negative electrode active material.

9. The electrical storage device element according to claim 8 , further comprising electrolyte disposed in a void between the positive electrode active material and the negative electrode active material of each adjacent positive and negative electrode layer.

10. An electrical storage device comprising:
the electrical storage device element according claim 1 ,
an air-tightly sealed package housing the electrical storage device element and having:
a pair of package electrodes electrically connected to the pair of end surface electrodes, respectively, and
electrolyte disposed in the air-tightly sealed package.

Assignees

• Murata Manufacturing Co

Inventors

• Horikawa Keiji
• Horiguchi Hiroki
• Ehara Yukio
• Ueda Yasuhiko
• Harada Hiroyuki
• Itaya Masaharu
• Fukuda Yasutake
• Hayashi Shigeo

Classifications

• H01G11/70

  characterised by their structure · CPC title

• H01G11/04 Primary

  Hybrid capacitors · CPC title

• H01G11/12

  Stacked hybrid or EDL capacitors · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01M2/166

  Electricity · mapped topic