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Systems and methods of fuel cell stack compression

A technology for compression systems and battery stacks, applied in the field of compression systems, can solve problems such as being expensive, not optimal, affecting contact resistance, gas diffusion layer porosity, microporous layer porosity, etc.

Pending Publication Date: 2020-08-04
NUVERA FUEL CELLS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although existing compression systems provide a mechanism for maintaining the electrochemical stack in compression, they are not optimal
For example, these existing systems can be overly complex, heavy and expensive
The process of compacting the heap with existing systems is often lengthy and complex
Additionally, the compressive force applied by existing compression systems is not always applied uniformly across the stack, which affects contact resistance, electrical conduction, and the porosity of the gas diffusion layer within the stack, the porosity of the microporous layer, the cell The porosity of the membrane, and other components
Therefore, unevenly applied compressive forces may affect the overall performance of the stack

Method used

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  • Systems and methods of fuel cell stack compression
  • Systems and methods of fuel cell stack compression
  • Systems and methods of fuel cell stack compression

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Embodiment Construction

[0022] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Although described with respect to electrochemical cells used to generate electricity, it should be understood that the apparatus and methods of the present application may be used with various types of fuel cells or electrochemical cells, including but not limited to electrolyzers, hydrogen purifiers, Hydrogen extender and hydrogen pump.

[0023] figure 1 A perspective view of electrochemical cell stack assembly 10 is shown in accordance with an exemplary embodiment. Assembly 10 may include an electrochemical cell stack 12 and a compression system 14 configured to maintain the stack 12 in a compressed state. Electrochemical cell stack 12 (which may be referred to herein as stack 12 ) may includ...

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Abstract

An electrochemical-cell stack assembly is provided. The assembly has an electrochemical-cell stack and a compression system that holds the electrochemical- cell stack in a state of compression. The compression system has a first endplate and a second endplate positioned at opposite ends of the electrochemical-cell stack. The compression system has a set of tension members coupled to the first endplate and the second endplate that maintain a fixed distance between the first endplate and the second endplate. The compression system has a compression plate disposed between the second endplate andthe electrochemical-cell stack. The compression system has a compression member in contact with the compression plate, wherein the compression member is configured to transfer a force to the compression plate. The compression system has a locking nut fastened to the second plate. The locking nut secures the position of the compression member and compression plate relative to the second endplate.

Description

technical field [0001] This application claims the benefit of US Provisional Application No. 62 / 536,157, filed July 24, 2017, which is hereby incorporated by reference in its entirety. [0002] The present disclosure relates to systems and methods of compression, and more particularly, to systems and methods for fuel cell stack compression. Background technique [0003] An electrochemical cell, such as a fuel cell or an electrolysis cell, is a device that can be used to generate an electric current from a chemical reaction or that can be used to cause a chemical reaction using the flow of electric current. Fuel cells convert the chemical energy of fuels (such as hydrogen, natural gas, methanol, gasoline, etc.) and oxidants (such as air or oxygen) into electricity and waste products (such as heat and water). A fuel cell may include a first electrode (eg, a negatively charged anode), a second electrode (eg, a positively charged cathode), and an ionically conductive material (...

Claims

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Application Information

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IPC IPC(8): H01M8/248
CPCH01M8/248Y02E60/50H01M8/0247
Inventor 本杰明·史蒂芬·兰特菲利波·甘比尼
Owner NUVERA FUEL CELLS LLC
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