Electrochemical stack compression system

Patent metadata

Field	Value
Publication number	US-10109880-B2
Application number	US-201414198317-A
Country	US
Kind code	B2
Filing date	Mar 5, 2014
Priority date	Mar 8, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

In accordance with one embodiment, an electrochemical cell stack compression system may include an integral, hollow frame configured to contain a plurality of electrochemical cells arranged along an axis in a stack configuration. The frame may have a defined shape and may form a continuous border around a periphery of the electrochemical cell stack when inserted. The frame may be formed of a plurality of fibers.

First claim

What is claimed is:

1. An electrochemical cell stack compression system comprising:
an integral, hollow frame that defines a cavity configured to contain a plurality of electrochemical cells arranged in a stack along an axis of the hollow frame, wherein the entire stack is configured to be contained within the cavity,
a pair of end blocks configured to be positioned at opposite ends of the stack,
a compression mechanism contained within the frame configured to apply a compressive force to the stack, wherein the compression mechanism includes a first gib and a second gib inserted between the stack and an end block, the first and second gibs each having a flat surface and an opposite, angled surface, the flat surface of the first gib lies adjacent the stack, and the angled surface of the second gib is sloped at an angle complimentary to the angled surface of the first gib and is inserted adjacent the angled surface of said first gib,
wherein the frame has a defined shape and forms a continuous border around a periphery of the electrochemical cell stack when contained within the frame, and
wherein the frame is formed of a plurality of fibers.

2. The compression system of claim 1 , wherein the plurality of fibers are composed of a plurality of different materials.

3. The compression system of claim 1 , wherein the frame includes multiple layers.

4. The compression system of claim 3 , wherein the frame includes a friction-reducing layer located adjacent at least one of the multiple layers.

5. The compression system of claim 1 , wherein the frame includes at least two opposing wall surfaces that form at least a portion of the continuous border.

6. The compression system of claim 1 , wherein the compression mechanism is configured to expand in response to an increase in temperature.

7. The compression system of claim 1 , wherein the compression mechanism includes one or more internal drive screws extending between two separate portions, wherein rotating the internal drive screws in a first direction moves the two separate portions further away from each other and rotating the internal drive screws in a second direction moves the two separate portions closer to each other.

8. The compression system of claim 1 , wherein the first or second gib includes one or more gripping mechanisms configured to engage the wall of the frame.

9. The compression system of claim 8 , wherein the gripping mechanism includes hooks protruding from the first or second gib configured to engage the frame.

10. The compression system of claim 1 , wherein the first and second gibs are located on either side of the stack.

Assignees

• Nuvera Fuel Cells Inc
• Nuvera Fuel Cells Llc

Inventors

• Blanchet Scott
• Domit Edward
• Lawrie Duncan

Classifications

• H01M8/2475 Primary

  Enclosures, casings or containers of fuel cell stacks · CPC title

• H01M8/248

  Means for compression of the fuel cell stacks · CPC title

• C25B9/65

  Means for supplying current; Electrode connections; Electric inter-cell connections · CPC title

• C25B9/77

  having diaphragms · CPC title

• C25B1/04

  by electrolysis of water · CPC title