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Method and system for diagnosing the state of a fuel cell stack

A fuel cell stack and fuel technology, applied in fuel cells, circuits, measuring electricity, etc., can solve problems such as the problem of fuel cell stacks that cannot be solved

Active Publication Date: 2021-03-12
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the proper measures are not taken, so the problems of the fuel cell stack cannot be solved, and new problems may be created

Method used

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  • Method and system for diagnosing the state of a fuel cell stack
  • Method and system for diagnosing the state of a fuel cell stack
  • Method and system for diagnosing the state of a fuel cell stack

Examples

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Embodiment Construction

[0027] Hereinafter, a method and system for diagnosing a state of a fuel cell stack as contamination according to a preferred embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0028] figure 1 is a block diagram illustrating a system for diagnosing a state of a fuel cell stack as fouled according to one embodiment of the present disclosure.

[0029] refer to figure 1 , the diagnostic system may include: a fuel cell stack 10; a voltmeter 11, which detects the output voltage of the fuel cell stack 10; an impedance meter 12, which measures the impedance of the fuel cell stack 10; and a controller 13, which receives the impedance of the fuel cell stack 10 and voltage and determine the state of the fuel cell stack 10 .

[0030]The fuel cell stack 10 may be an element that generates electricity through a redox reaction of oxygen and hydrogen.

[0031] The fuel cell stack 10 may include a plurality of individual cells stacked in s...

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Abstract

The present application discloses methods and systems for diagnosing the status of a fuel cell stack. A method for diagnosing a condition of a fuel cell stack as fouled comprising: measuring an impedance of the fuel cell stack at a predetermined low frequency and a predetermined high frequency; the impedance at the predetermined high frequency being below a first critical point and predetermined low When the impedance at the frequency is higher than the second critical point, increasing the amount of fuel or oxidant provided to the fuel cell stack; re-measuring the impedance of the fuel cell stack at a predetermined low frequency; and the predetermined low frequency measured in the step of re-measuring Fuel cell stack fouling is determined when the lower impedance is above the second critical point.

Description

technical field [0001] The present disclosure relates to techniques for detecting contamination of fuel cells, and more particularly, to methods and systems for diagnosing the status of a fuel cell stack as being contaminated by measuring the impedance of the fuel cell stack at high and low frequencies . Background technique [0002] A fuel cell system is a power generation system that directly converts the chemical energy of fuel into electricity. A fuel cell system includes a fuel cell stack that generates electricity; a fuel supply unit that supplies fuel (i.e., hydrogen) to the fuel cell stack; an air supply unit that supplies the fuel cell stack with air (i.e., oxygen) used as an oxidant that generating the electrochemical reaction; and a heat and water management unit that removes heat from the fuel cell stack and controls the operating temperature of the fuel cell stack. The fuel cell stack generates electricity through the electrochemical reaction between hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04664H01M8/04537H01M8/04746G01N27/02
CPCG01N27/02H01M8/04559H01M8/04649H01M8/04679H01M8/04753H01M8/04529H01M2008/1095Y02E60/50G01R31/389G01R31/392H01M8/04589H01M8/1004
Inventor 皮贤英郑贵成
Owner HYUNDAI MOTOR CO LTD
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