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A fuel cell startup and shutdown control method

A technology of fuel cells and control methods, applied in fuel cells, circuits, electrical components, etc., can solve problems such as decrease in active area, loss of metal catalysts, corrosion, etc.

Active Publication Date: 2021-09-14
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can make the voltage of each battery average as much as possible in the operation of reducing the voltage, and the auxiliary system for reducing the voltage is complicated, but it does not solve the problem of the carbon carrier and the carbon carrier of the cathode catalytic layer under the condition of high voltage (1.4V) in the process of starting and stopping. Water reacts, causing carbon corrosion, causing the loss and agglomeration of metal catalysts, resulting in a decrease in active area and rapid performance decay

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  • A fuel cell startup and shutdown control method
  • A fuel cell startup and shutdown control method
  • A fuel cell startup and shutdown control method

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Embodiment

[0035] Such as figure 1 As shown, the present invention provides a fuel cell startup and shutdown control method, wherein the shutdown method includes the following steps:

[0036] S1) Control the fuel cell to maintain the operating current I, respectively perform the first purge on the anode and cathode of the fuel cell until the single-chip high-frequency internal resistance of the battery reaches the second internal resistance R 2 ;

[0037] S2) Turn off the load, respectively carry out the second purge to the anode and the cathode of the fuel cell until the high-frequency internal resistance of the monolithic battery reaches the third internal resistance R 3 ;

[0038] S3) stop feeding air, continue feeding hydrogen, keep the second set time t 2 ;

[0039] S4) stop feeding hydrogen, and complete shutdown.

[0040] The start method includes the following steps:

[0041] 1) Simultaneously purging the anode and cathode of the fuel cell;

[0042]2) Keep the first set ti...

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Abstract

The present invention relates to a fuel cell startup and shutdown control method, including a startup method and a shutdown method. The shutdown method includes the following steps: S1) controlling the fuel cell to maintain the operating current I, respectively performing the first Purge until the monolithic high-frequency internal resistance of the battery reaches the second internal resistance R 2 ; S2) turn off the load, respectively carry out the second purge to the anode and the cathode of the fuel cell until the monolithic high-frequency internal resistance of the battery reaches the third internal resistance R 3 ; S3) stop feeding air, continue feeding hydrogen, keep the second set time t 2 ; S4) Stop feeding the hydrogen to complete the shutdown. Compared with the prior art, the present invention has the advantages of reducing the performance degradation of the fuel cell startup and shutdown process.

Description

technical field [0001] The invention relates to the technical field of fuel cell systems, in particular to a method for controlling start-up and shutdown of fuel cells. Background technique [0002] Fuel cells can convert the chemical energy of fuel and oxidant into electrical energy, and its energy conversion efficiency is not limited by the theoretical efficiency of the Carnot heat engine cycle. It has the advantages of high efficiency, environmental friendliness, quietness, and high reliability, and has broad development prospects in many fields. . Among them, proton exchange membrane fuel cells have high power density, fast start-up, and fast response to load changes, which have become an important development direction of energy in the field of transportation. Proton exchange membrane fuel cells as vehicle power must withstand the test of complex working conditions and harsh environments such as high potential, high current, frequency variable load, sub-zero start-up, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04303H01M8/04302H01M8/04537H01M8/04828
CPCH01M8/04641H01M8/04828H01M8/04302H01M8/04303Y02E60/50
Inventor 陈广明徐鑫甘全全王永湛
Owner SHANGHAI SHENLI TECH CO LTD