Fuel cell stack column including stress-relief components

Patent metadata

Field	Value
Publication number	US-10673092-B2
Application number	US-201916245721-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Oct 7, 2015
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A fuel cell column includes termination plates, fuel cell stacks disposed between the termination plates, and fuel manifolds disposed between the fuel cell stacks. The fuel cell stacks include fuel cells, interconnects disposed between the fuel cells, and end plates disposed on opposing ends of the fuel cell stacks. At least one of the termination plates and/or the fuel manifold may include first and second separate pieces separated by an expansion zone. The fuel cell stack may also include one or more buffer layers and/or seals configured to reduce CTE differences of components of the fuel cell stack.

First claim

What is claimed is:

1. A fuel cell stack column comprising:
first and second termination plates; and
at least one fuel cell stack disposed between the first and second termination plates,
wherein at least one of the first and second termination plates comprises first and second pieces separated by an expansion zone; and
wherein each of the first and second pieces comprises a fuel riser opening sealing surface.

2. A fuel cell stack column comprising:
first and second termination plates; and
at least one fuel cell stack disposed between the first and second termination plates,
wherein at least one of the first and second termination plates comprises first and second pieces separated by an expansion zone; and
wherein the first and second the termination plates comprise electrical connectors attached to one of the corresponding first and second pieces.

3. A fuel cell stack column comprising:
first and second termination plates; and
at least one fuel cell stack disposed between the first and second termination plates,
wherein at least one of the first and second termination plates comprises first and second pieces separated by an expansion zone;
wherein the fuel cell stack column comprises a plurality of the fuel cell stacks and fuel manifolds disposed between the fuel cell stacks, each fuel cell stack comprising:
fuel cells;
interconnects disposed between the fuel cells; and
end plates disposed on opposing sides of the fuel cell stack,

wherein the coefficient of thermal expansion (CTE) of the fuel cell stack is not equal to the CTE of the termination plates; and
wherein the fuel manifolds each comprise first and second pieces separated by an expansion zone.

4. The fuel cell stack column of claim 3 , further comprising:
a first buffer layers disposed between the fuel manifolds and an adjacent fuel cell stack; and
a second buffer layers disposed between the termination plates and the adjacent fuel cell stacks,
wherein the first and second buffer layers each comprise first and second pieces separated by an expansion zone.

Assignees

• Bloom Energy Corp

Inventors

• Armstrong Tad
• Lesher Michael
• Lee Christopher

Classifications

• H01M8/2484 Primary

  characterised by external manifolds · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/2428

  Grouping by arranging unit cells on a surface of any form, e.g. planar or tubular · CPC title

• H01M8/021

  Alloys based on iron · CPC title

• H01M8/248

  Means for compression of the fuel cell stacks · CPC title