Electrical energy store

Patent metadata

Field	Value
Publication number	US-10096874-B2
Application number	US-201314410977-A
Country	US
Kind code	B2
Filing date	May 23, 2013
Priority date	Jun 29, 2012
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

An electrical energy store is provided, including a storage cell, which in turn has an air electrode, which is connected to air channels in an air supply device, and a storage electrode, wherein the storage electrode adjoins a storage structure, wherein electrical contacts rest on the storage electrode, further wherein contact pins which protrude out of a surface of the storage structure are integrated in the storage structure, and the contact pins are in electrical contact with the storage electrode.

First claim

The invention claimed is:

1. An electrical energy store comprising:
a storage cell, which in turn comprises an air electrode, which is connected to air channels of an air inlet apparatus, and
a storage electrode, wherein the storage electrode adjoins a storage structure comprising a porous energy storage medium comprising a functionally effective oxidizable material as an active storage material, wherein electrical contacts rest on the storage electrode,
wherein contact pins are integrated in the storage structure, said contact pins protruding out of a surface of the storage structure and being in electrical contact with the storage electrode, and
wherein the functionally effective oxidizable material comprises at least one of iron and iron oxide.

2. The energy store as claimed in claim 1 , further comprising
an interconnector plate, wherein the air channels are arranged on an air side of the interconnector plate, and a receiving depression for the storage structure is arranged on a storage side of the interconnector plate.

3. The energy store as claimed in claim 2 , wherein a current path is defined through the energy store by:
a volume material of a first interconnector plate making contact with
contact webs between the air channels of the first interconnector plate which, in turn, make contact with
the air electrode which, in turn, makes contact with
a solid electrolyte which, in turn, makes contact with
the storage electrode which, in turn, makes contact with
the contact pins of the storage structure which, in turn, make contact with
the volume material of a second interconnector plate.

4. The energy store as claimed in claim 1 , wherein a diameter of the contact pins is between 2 mm and 7 mm.

5. The energy store as claimed in claim 1 , wherein the contact pins have a spacing of between 10 mm and 30 mm.

6. The energy store as claimed in claim 1 , wherein the contact pins have rounded heads.

7. The energy store as claimed in claim 1 , wherein a diameter of the contact pins is between 2 mm and 4 mm.

8. The energy store as claimed in claim 1 , wherein the contact pins have a spacing of between 17 mm and 21 mm.

9. An electrical energy store comprising:
an electrode/electrolyte unit comprising an air electrode, a solid electrolyte and a storage electrode;
a storage structure comprising an active storage material;
a plurality of contact pins extending through a thickness of the storage material, a first end of the contact pins extending beyond the thickness of the storage material to make contact with the storage electrode;
an interconnector plate comprising an upper side in contact with a second end of the contact pins extending beyond the thickness of the storage material; and
contact webs formed on a lower side of the interconnector plate and defining air channels there between.

10. The energy store as claimed in claim 9 , wherein a critical resistance is defined as being equal to 10% of a resistance of the electrode/electrolyte unit calculated assuming ideal contact between the air electrode/solid electrolyte and between the solid electrolyte/storage electrode, and spacing between and diameter of the contact pins is selected such that an effective resistance contribution caused by a passage of current through an interface between the interconnector plate and the contact pins is less than the critical resistance.

11. The energy store as claimed in claim 9 , wherein a critical resistance is defined as being equal to 10% of a resistance of the electrode/electrolyte unit calculated assuming ideal contact between the air electrode/solid electrolyte and between the solid electrolyte/storage electrode, and spacing between and diameter of the contact pins is selected such that an effective resistance contribution caused by a passage of current through an interface between the contact pins and the storage electrode is less than the critical resistance.

12. The energy store as claimed in claim 9 , wherein a critical resistance is defined as being equal to 10% of a resistance of the electrode/electrolyte unit calculated assuming ideal contact between the air electrode/solid electrolyte and between the solid electrolyte/storage electrode, and spacing between and diameter of the contact pins is selected such that an effective resistance contribution caused by a voltage drop along the contact pins is less than the critical resistance.

13. The energy store as claimed in claim 9 , wherein a critical resistance is defined as being equal to 10% of a resistance of the electrode/electrolyte unit calculated assuming ideal contact between the air electrode/solid electrolyte and between the solid electrolyte/storage electrode, and an effective resistance of a current constriction in the storage electrode is less than the critical resistance.

14. The energy store as claimed in claim 9 , wherein a material of construction of the contact pins is different than a material of construction of the interconnector plate.

15. The energy store as claimed in claim 9 , wherein the contact pins comprise a sintered metal powder.

16. The energy store as claimed in claim 9 , wherein the upper side of the interconnector plate comprises a rim defining a depression receiving the storage structure therein.

17. The energy store as claimed in claim 9 , wherein the active storage material comprises at least one of iron and iron oxide.

18. An electrical energy store comprising:
an electrode/electrolyte unit comprising an air electrode, a solid electrolyte and a storage electrode;
an interconnector plate comprising contact webs defining air channels in contact with the air electrode;
a storage structure comprising an active storage material; and
a plurality of contact pins extending through a thickness of the storage structure, an end of each contact pin extending beyond the thickness of the storage structure to make contact with the storage electrode.

19. The energy store as claimed in claim 18 , wherein the active storage material comprises at least one of iron and iron oxide.

Assignees

• Siemens Ag

Inventors

• Landes Harald
• Schuh Carsten
• Soller Thomas

Classifications

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• Y02E60/128

  Cross-Sectional Technologies · mapped topic

• H01M8/0256

  Vias, i.e. connectors passing through the separator material · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02E60/50

  Fuel cells · CPC title