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Anode Emission Control in Fuel Cell Stacks

A fuel cell stack, fuel cell technology, applied in fuel cell control, fuel cells, fuel cell additives, etc., can solve problems such as waste of fuel

Active Publication Date: 2019-06-28
INTELLIGENT ENERGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has the potential disadvantage of wasting fuel

Method used

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  • Anode Emission Control in Fuel Cell Stacks
  • Anode Emission Control in Fuel Cell Stacks
  • Anode Emission Control in Fuel Cell Stacks

Examples

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Embodiment Construction

[0032] refer to figure 1 , an electrochemical fuel cell device 1 comprising a fuel cell stack 2 having a fuel delivery inlet 3 and a fuel delivery outlet 4 . The fuel cell stack 2 is constructed from a plurality of fuel cells 5 in stack formation according to known principles. Each cell 5 has a membrane-electrode assembly (MEA), an anode fluid flow path for delivering fluid fuel to the anode side of the MEA, and a cathode fluid flow path for delivering fluid oxidant to the cathode side of the MEA. The cathode flow paths and cathode fluid delivery infrastructure for delivering oxidant fluid such as air to the MEA and removing reaction by-products such as water from the MEA may be configured in a completely conventional manner and are not shown or described herein.

[0033] The fuel delivery inlet 3 is coupled to a fuel delivery conduit 6 which is fed from a fuel supply 7 such as the hydrogen supply shown. The fuel delivery conduits thus deliver the fluid fuel to the fuel cell...

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PUM

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Abstract

An electrochemical fuel cell assembly includes a fuel cell stack having a fuel delivery inlet and a fuel delivery outlet. The fuel cell stack also includes a plurality of fuel cells each having a membrane-electrode assembly and a fluid flow path coupled between the fuel delivery inlet and the fuel delivery outlet for delivering fuel to all The membrane-electrode assembly is described. A fuel delivery conduit is coupled to the fuel delivery inlet for delivering fluid fuel to the stack. A drain conduit is coupled to the fuel delivery outlet for draining fluid out of the stack. A variable orifice flow control device coupled to the discharge conduit is configured to dynamically vary the amount of fluid entering the discharge conduit from the fuel delivery outlet as a function of one or more of the following control parameters: (i) the measured fuel concentration; (ii) the measured humidity; (iii) the cell voltage of the fuel cells in the stack; (iv) the impedance of the fuel cells in the stack; Fuel cell resistance. The variable orifice flow control device may be coupled to a recirculation conduit and may be configured to dynamically vary the proportion of fluid entering the discharge conduit from the fuel delivery outlet as a function of the control parameter.

Description

technical field [0001] The present invention relates to fuel cells, and in particular, but not exclusively, to fuel cells of the proton exchange membrane type in which hydrogen is supplied to the anode side of the fuel cell, oxygen is supplied to the cathode side of the fuel cell and water by-products are present in the fuel cell It is produced on the cathode side of the cell and removed from the cathode side of the fuel cell. Background technique [0002] Such fuel cells comprise a proton exchange membrane (PEM) sandwiched between two porous electrodes which together comprise a membrane-electrode assembly (MEA). The MEA itself is generally sandwiched between (i) a cathode diffusion structure having a first side adjacent to the cathode side of the MEA and (ii) an anode diffusion structure having a first side adjacent to the anode side of the MEA. The second face of the anode diffusion structure contacts the anode fluid flow field plate for current collection and for distrib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04089H01M8/04119H01M8/04223H01M8/04746H01M8/0432H01M8/0438H01M8/0444H01M8/04492H01M8/04537
CPCH01M8/04097H01M8/04179H01M8/04231H01M8/04328H01M8/04388H01M8/04447H01M8/045H01M8/04552H01M8/04559H01M8/04641H01M8/04649H01M8/04761H01M2008/1095Y02E60/50H01M8/04156H01M8/04313H01M8/0444H01M8/04462H01M8/04492H01M8/04514H01M8/04544H01M8/04634H01M8/04753H01M8/04164H01M8/241H01M8/2457
Inventor 普拉塔普·罗摩保尔·莱纳德·阿德科克吉格纳什·卡尔萨·德瓦什·帕特尔
Owner INTELLIGENT ENERGY LTD