Cell stack device, module, and module-containing device

Patent metadata

Field	Value
Publication number	US-10651481-B2
Application number	US-201515126685-A
Country	US
Kind code	B2
Filing date	Mar 25, 2015
Priority date	Mar 26, 2014
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A cell stack device ( 1 ) according to the present invention includes a plurality of cells ( 3 ) having a columnar shape; and
electrically conductive members ( 4 ) interposed between adjacent cells ( 3 ) of the plurality of cells ( 3 ), and connected to the each adjacent cell ( 3 ) with a bonding material ( 15 ) having electrically conductive property. The bonding material ( 15 ) contains electrically conductive particles and fibrous bodies ( 16 ) having electrically insulating properties, and a major axis direction of the fibrous bodies ( 16 ) is oriented in a predetermined direction in regions where the electrically conductive members ( 4 ) face to the each adjacent cell ( 3 ).

First claim

What is claimed is:

1. A cell stack device comprising:
a plurality of cells having a columnar shape; and
an electrically conductive member interposed between adjacent cells of the plurality of cells and connected to each of the respective adjacent cells with a bonding material having electrically conductive property,
wherein
the bonding material contains electrically conductive particles and fibrous bodies having electrically insulating property, and
a major axis direction of the fibrous bodies is oriented in a predetermined direction in regions where the electrically conductive members face each of the respective adjacent cells, wherein
the major axis direction of the fibrous bodies is oriened in a longitudinal direction of the plurality of cells and
in a cross-section of the bonding material perpendicular to a lateral direction of the plurality of cells, a percentage of the fibrous bodies, whose major axis directions are oriented in the longitudinal direction of the plurality of cells, is no greater than 30%.

2. The cell stack device according to claim 1 ,
wherein in a cross-section perpendicular to a thickness direction of the bonding material, a percentage of the fibrous bodies, whose major axis directions are oriented in the longitudinal direction of the plurality of cells, is no less than 50%.

3. The cell stack device according to claim 1 , wherein
the electrically conductive particles are composed of a perovskite oxide containing La, and
the fibrous bodies having electrically insulating properties are composed of an oxide of at least one of Al, Si, and Ti.

4. A module comprising:
the cell stack device according to claim 1 ; and
a housing container containing the cell stack device therein.

5. A module-containing device comprising:
the module according to claim 4 ;
an auxiliary device configured to operate the module; and
an external case containing the module and the auxiliary device therein.

6. The cell stack device according to claim 1 ,
wherein the fibrous bodies are 5 to 30 mass % of the bonding material.

7. The cell stack device according to claim 2 ,
wherein in the cross-section perpendicular to the thickness direction of the bonding material, an angle at which the major axis direction of the fibrous bodies intersects the longitudinal direction is in a range of −40 to 40 degrees.

8. The cell stack device according to claim 1 ,
wherein in the cross-section of the bonding material perpendicular to the lateral direction of the plurality of cells, an angle at which the major axis direction of the fibrous bodies intersects the longitudinal direction is in a range of −25 to 25 degrees.

9. The cell stack device according to claim 8 ,
wherein in a cross-section perpendicular to a thickness direction of the bonding material, a percentage of the fibrous bodies, whose major axis directions are oriented in the longitudinal direction of the plurality of cells, is no less than 50%.

10. The cell stack device according to claim 8 , wherein
the electrically conductive particles are composed of a perovskite oxide containing La, and
the fibrous bodies having the electrically insulating property are composed of an oxide of at least one of Al, Si, and Ti.

11. A module comprising:
the cell stack device according to claim 8 ; and
a housing container containing the cell stack device therein.

12. A module-containing device comprising:
the module according to claim 11 ;
an auxiliary device configured to operate the module; and
an external case containing the module and the auxiliary device therein.

13. The cell stack device according to claim 8 ,
wherein the fibrous bodies are 5 to 30 mass % of the bonding material.

14. The cell stack device according to claim 9 ,
wherein in the cross-section perpendicular to the thickness direction of the bonding material, an angle at which the major axis direction of the fibrous bodies intersects the longitudinal direction is in a range of −40 to 40 degrees.

Assignees

• Kyocera Corp

Inventors

• Sugihara Kazunari

Classifications

• H01M8/243

  Grouping of unit cells of tubular or cylindrical configuration · CPC title

• H01M8/0228

  in the form of layered or coated products · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/0223 Primary

  Composites · CPC title

• H01M8/0217

  Complex oxides, optionally doped, of the type AMO3, A being an alkaline earth metal or rare earth metal and M being a metal, e.g. perovskites · CPC title