Stack for an electrical energy accumulator

Patent metadata

Field	Value
Publication number	US-9768480-B2
Application number	US-201314373315-A
Country	US
Kind code	B2
Filing date	Jan 11, 2013
Priority date	Jan 25, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A stack for an electrical energy accumulator is provided having at least one storage cell, which in turn has a storage electrode and an air electrode that is connected to an air supply device, the air supply device having an air distribution plate, wherein the stack also has a water vapor supply device which is in contact with the storage electrode and the air distribution plate has at least one element of the water vapor supply device.

First claim

The invention claimed is:

1. A stack for an electrical energy accumulator comprising:
at least one storage cell which in turn comprises a storage electrode and an air electrode which is connected to an air supply apparatus, and the air supply apparatus comprises an air distribution plate,
wherein the stack additionally comprises a water vapor supply apparatus which is in contact with the storage electrode, wherein water vapor is at a stationary excess pressure in relation to an ambient pressure, and
wherein the air distribution plate comprises:
an air inlet configured to receive air and to deliver the air to an air inlet recess, wherein the air inlet recess is configured to move the air laterally to an air channel;
an air outlet recess configured to receive the air from the air channel and move the air laterally to an air outlet;
a water vapor inlet configured to receive water vapor and to deliver the water vapor to a water vapor inlet recess, wherein the water vapor inlet recess is configured to move the water vapor laterally to a water vapor channel; and
a water vapor outlet recess configured to receive the water vapor from the water vapor channel and to move the water vapor laterally to a water vapor outlet.

2. The stack as claimed in claim 1 , further comprising a bottom plate and at least one interconnector plate, said plates each having at least two vertically continuous cutouts which, when the plates are stacked, each form the air channel and the water vapor channel in the stack.

3. The stack as claimed in claim 2 , wherein at least two water vapor channels are provided, said water vapor channels being connected to in each case one recess.

4. The stack as claimed in claim 1 , further comprising a top plate, said top plate being connected to the air electrode.

5. The stack as claimed in claim 4 , wherein the top plate has recesses which are connected to the air channel and at least one hole of which leads to an additional channel which is in direct contact with the air electrode.

Assignees

• Siemens Ag

Inventors

• Drenckhahn Wolfgang
• Greiner Horst
• Rothfischer Johann

Classifications

• H01M8/0202

  Collectors; Separators, e.g. bipolar separators; Interconnectors · CPC title

• H01M8/04089

  of gaseous reactants · CPC title

• H01M12/08 Primary

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

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M8/2432

  Grouping of unit cells of planar configuration · CPC title