Method and system for controlling low-temperature quick start of fuel cell

A fuel cell, fast start technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as difficulty in cold start, inability to start, etc., to improve concentration polarization, prevent start failure, reduce effect of concentration

Pending Publication Date: 2021-07-20
KUSN FUERSAI ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fuel cell low-temperature rapid start control method and system, which can overcome the defects of the prior art that cold start is difficult or impossible to start when the ambient temperature is low

Method used

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  • Method and system for controlling low-temperature quick start of fuel cell
  • Method and system for controlling low-temperature quick start of fuel cell
  • Method and system for controlling low-temperature quick start of fuel cell

Examples

Experimental program
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Embodiment 1

[0033] refer to figure 1 and figure 2 , an embodiment of the present invention provides a fuel cell low-temperature fast start-up control method, comprising the following steps:

[0034] The fuel cell stack is provided with an auxiliary heating and cooling circuit and a heat radiation cooling circuit (ie, cooling circuit a and cooling circuit b) for circulating circulating cooling liquid, and the initial temperature value T2 of the cooling liquid of the fuel cell stack is obtained;

[0035] When the initial temperature T2 of the coolant is lower than the cold start preset threshold T1, the fuel cell executes the low-temperature rapid start control strategy, and the coolant is circulated by the auxiliary heating and cooling circuit;

[0036] When the initial temperature T2 of the coolant is higher than the preset cold start threshold T1, the fuel cell executes the normal temperature start control strategy, and the coolant is circulated by the heat dissipation and cooling circ...

Embodiment 2

[0040] refer to image 3 , the embodiment of the present invention provides a fuel cell low-temperature quick-start control system, including a fuel cell stack 6, an auxiliary heating and cooling circuit pipeline 1, a heat dissipation and cooling circuit pipeline 8, a temperature and pressure integrated sensor 5, and a fuel cell controller 19, wherein :

[0041] Auxiliary heating and cooling circuit pipelines 1 are respectively connected to the fuel cell stack 6 and the heat dissipation and cooling circuit pipeline 8, and are used for auxiliary heating of the coolant circulating into the fuel cell stack 6;

[0042] The heat dissipation and cooling circuit pipeline 8 is connected to the fuel cell stack 6, and is used to dissipate heat and reduce the temperature of the coolant circulating into the fuel cell stack 6;

[0043] The temperature and pressure integrated sensor 5 is arranged at the coolant inlet of the fuel cell stack, and is used to monitor and obtain the initial tem...

Embodiment 3

[0052] refer to Figure 3-Figure 5 , the embodiment of the present invention provides a fuel cell low temperature quick start control method and system, further comprising the fuel cell stack 6 is also connected with an air circulation loop pipeline 17, and the air circulation loop pipeline 17 is provided with a proportional valve 16 and an air compressor 12. Specifically, it also includes an air intake pipeline 10, a chemical filter 11, an air compressor 12, an intercooler 13, and a humidifier 14 connected in sequence, for supplying air to the fuel cell stack 6, and the air circulation loop The pipeline 17 is also provided with a vacant pipeline 15 and a vacant pipeline 18 through a proportional valve 16, the vacant pipeline 15 is connected to the humidifier 14, and the proportional valve 16 is connected to control the circulating intake air entering the air compressor 12; When the fuel cell executes the low-temperature quick-start control strategy, by reducing the air flow r...

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PUM

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Abstract

The invention discloses a method and system for controlling low-temperature quick start of a fuel cell, and the method comprises the following steps that an auxiliary heating cooling loop and a heat dissipation cooling loop which are used for circulating a circulating cooling liquid are set for a fuel cell stack, and an initial temperature value of the cooling liquid of the fuel cell stack is obtained; when the initial temperature value of the cooling liquid is lower than a cold start preset threshold value, the fuel cell executes a low-temperature quick start control strategy, and the cooling liquid circularly circulates through the auxiliary heating and cooling loop; and when the initial temperature value of the cooling liquid is higher than a cold start preset threshold value, the fuel cell executes a normal-temperature start control strategy, and the cooling liquid circularly circulates through the heat dissipation cooling loop or circularly circulates through the auxiliary heating cooling loop and the heat dissipation cooling loop at the same time. The defect that cold start is difficult or cannot be started when the environment temperature is low in the prior art can be overcome.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a method and system for rapid start-up control of fuel cells at low temperature. Background technique [0002] When the fuel cell is running, an electrochemical reaction occurs inside the battery to generate a large amount of water, and at the same time a large amount of waste heat is generated. When the starting temperature of the fuel cell is lower than zero, the liquid water generated inside the stack will freeze quickly, and the temperature inside the fuel cell will reach 0°C Before, the water generated by the reaction will block the fuel or air (oxygen) intake channel of the battery catalytic layer after freezing, hindering the normal chemical reaction in the local area. Failure to start or damage to the fuel cell. Therefore, the fuel cell cannot meet the normal start-up requirements at an ambient temperature below zero, and the problem of water freezing needs to be solved. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04007H01M8/04029H01M8/04223H01M8/04225H01M8/04302H01M8/0432H01M8/04701
CPCH01M8/04029H01M8/04037H01M8/04225H01M8/04268H01M8/04302H01M8/04358H01M8/04723Y02E60/50
Inventor 王文智张超管俊生夏冬冬陶安文戴俊
Owner KUSN FUERSAI ENERGY
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