Method for accelerating activation of fuel cell

A fuel cell and fuel electrode technology, applied in the direction of fuel cells, fuel cell control, fuel cell additives, etc., can solve problems such as complex systems, increased activation time, and complex methods

Active Publication Date: 2009-11-18
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] (1) For the method of controlling the reactant gas by applying direct current, since the reactant gas should change from air to nitrogen, the method is very complicated and requires an additional nitrogen supply device
[0018] (2) For activation methods run by constant current mode, nitrogen must also be supplied, requiring additional nitrogen supply equipment
[0020] (4) For the method of activating a fuel cell by applying a voltage using a battery, it is necessary to provide a primary battery and a capacitor as well as a battery, so the system is very complicated
[0021] (5) For the method of preconditioning by membrane hydration, an inert gas such as nitrogen must be used instead of air, and an additional activation process must be performed after the hydration process is completed, so the system is very complicated and the activation time increases

Method used

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  • Method for accelerating activation of fuel cell
  • Method for accelerating activation of fuel cell
  • Method for accelerating activation of fuel cell

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Embodiment 1

[0065] In a preferred embodiment, as the first step, hydrogen is preferably supplied to the fuel electrode of the fuel cell, and at the same time, oxygen is preferably supplied to the air electrode of the fuel cell; but the amount used is relatively small, and the cell voltage is properly maintained at 0.95-1.2V Under the open circuit voltage (OCV) and hold for 10-20 seconds.

[0066] In a preferred embodiment, as a second step, the air supply to the air electrode is appropriately cut off, preferably, as a third step, after cutting off the air supply to the air electrode, the battery voltage is preferably changed from 0.95-1.2V OCV Appropriately lowered to the threshold level, which is 0.2V.

[0067] In a preferred embodiment, as a fourth step, when the cell voltage preferably drops to a threshold voltage of 0.2V, air is preferably supplied to the air electrode again to properly increase the cell voltage to an OCV of 0.95-1.2V.

[0068] In a further preferred embodiment, the ...

Embodiment 2

[0073] In a preferred embodiment, as a first step, hydrogen and air are preferably supplied to the fuel and air electrodes of the fuel cell, and a current load is preferably applied to the fuel cell to maintain the proper cell voltage of the fuel cell at 0.8-1.23V , which is lower than the open circuit voltage (OCV).

[0074] In some embodiments, since the OCV of most commonly used batteries is close to 0.9V, when a small amount of current is applied, the voltage can be properly maintained at 0.8V, with 1.23V representing the theoretical voltage.

[0075] In other embodiments, as a second step, the air supply to the air electrode is preferably cut off, and preferably, as a third step, the cell voltage is reduced to a threshold level of 0.2V after the air supply to the air electrode is cut off.

[0076] Thus, in other embodiments, the cell voltage is suitably maintained at 0-0.2V with the air supply suitably cut off and preferably only hydrogen supplied to the fuel cell.

[00...

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Abstract

The present invention provides a method for accelerating activation of a fuel cell, which can significantly reduce the time required for the activation of the fuel cell and the amount of hydrogen used and facilitate the activation of the fuel cell.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119(a) to Korean Patent Application No. 10-2008-44894 filed on May 15, 2008, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a method for accelerating the activation of fuel cells. More specifically, the present invention relates to a method for accelerating the activation of a fuel cell, wherein the method can reduce the time required for the activation of the fuel cell and the amount of hydrogen used, and promote the activation of the fuel cell. Background technique [0004] Typically, fuel cells are powered by hydrogen (H 2 ) and oxygen (O 2 ) A device that generates electrical energy through an electrochemical reaction between the device, which includes a membrane electrode assembly (MEA). [0005] Such as Figure 6 As shown, the MEA may include a fuel electrode 12 (anode) supplied with hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCH01M2008/1095H01M8/04089H01M8/0488H01M8/0491H01M8/04223Y02E60/50H01M8/04753H01M8/04559H01M8/043H01M8/04H01M8/04302
Inventor 吴承灿高载准金永敏孙翼齐李钟贤尹钟震
Owner HYUNDAI MOTOR CO LTD
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