WO2021258704A1 - Procédé basé sur l'intensité pour commander la fréquence d'ouverture de valve d'évacuation d'hydrogène et de valve de vidange d'eau - Google Patents

Procédé basé sur l'intensité pour commander la fréquence d'ouverture de valve d'évacuation d'hydrogène et de valve de vidange d'eau Download PDF

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Publication number
WO2021258704A1
WO2021258704A1 PCT/CN2020/141496 CN2020141496W WO2021258704A1 WO 2021258704 A1 WO2021258704 A1 WO 2021258704A1 CN 2020141496 W CN2020141496 W CN 2020141496W WO 2021258704 A1 WO2021258704 A1 WO 2021258704A1
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WIPO (PCT)
Prior art keywords
opening
different
current
opening time
valve
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Application number
PCT/CN2020/141496
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English (en)
Chinese (zh)
Inventor
马秋玉
赵洪辉
鲍金成
都京
丁天威
黄兴
曲禄成
王宇鹏
秦晓津
芦岩
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中国第一汽车股份有限公司
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Publication of WO2021258704A1 publication Critical patent/WO2021258704A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04828—Humidity; Water content
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04791—Concentration; Density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to a method for controlling the opening frequency of a hydrogen exhaust valve and a drain valve, in particular to a method for controlling the opening frequency of a hydrogen exhaust valve and a drain valve based on electric current.
  • the fuel cell system may have excessive humidity under certain circumstances and is extremely prone to flooding. Therefore, a drain solenoid valve must be integrated in the general stack or system.
  • a water separator is integrated to separate hydrogen and water in advance, and then the water and hydrogen are discharged from the system through different channels.
  • the existing schemes mostly use a fixed hydrogen discharge frequency, and it is impossible to flexibly adjust the hydrogen discharge frequency according to different efficiencies.
  • Patent Document 1 discloses a fuel cell anode intermittent hydrogen discharge system and a control method thereof.
  • the control method includes: real-time monitoring of the voltage of the fuel cell stack and the nitrogen concentration at the anode outlet of the fuel cell stack; When the voltage drop of the fuel cell stack during the period when the anode hydrogen discharge is off is greater than the preset pressure drop threshold, the hydrogen at the anode outlet of the fuel cell stack is controlled to start to discharge; when it is determined that the fuel cell stack anode outlet When the nitrogen concentration of is less than the preset nitrogen concentration threshold, the hydrogen discharge from the anode outlet of the fuel cell stack is controlled to stop.
  • the hydrogen exhaust system and the control method thereof can improve the hydrogen utilization efficiency of the fuel cell system on the basis of maintaining the stability of the fuel cell stack voltage.
  • Patent Document 2 discloses a hydrogen exhaust system for a proton exchange membrane fuel cell that can be quickly opened at low temperatures, including: a hydrogen exhaust pipe, a hydrogen exhaust valve, a coolant branch, and a liquid injection valve.
  • the hydrogen exhaust pipe includes an inlet pipe. The two are connected by a hydrogen exhaust valve, and the air inlet of the inlet pipe is connected with the fuel cell stack; the inlet pipe of the hydrogen exhaust pipe and the coolant branch are connected by a liquid injection valve, and the coolant Coolant can be injected into the other end of the branch.
  • the invention takes advantage of the low freezing point of the fuel cell system coolant, covers and protects the hydrogen discharge pipeline and the hydrogen discharge valve, avoids pipeline blockage and valve body freezing caused by low-temperature solidification of gas and liquid water, and significantly improves hydrogen discharge
  • the opening speed of the system also shortens the cold start-up time of the fuel cell system at low temperatures, improves the efficiency of the fuel cell system, and the overall design is simple and easy to implement.
  • the present invention provides a current-based method for controlling the opening frequency of a hydrogen discharge valve and a discharge valve.
  • the hydrogen discharge frequency is adjusted according to different efficiencies.
  • the discharge frequency is high in the high-efficiency zone and low in the low-efficiency zone. .
  • the efficiency of a fuel cell is determined by the current. The greater the current, the lower the efficiency. Therefore, when supplying hydrogen, the amount of hydrogen supplied can be controlled according to the efficiency of the battery under different currents, as well as the control of the hydrogen circulation loop.
  • An electric current-based method for controlling the opening frequency of a drain valve and a drain valve controls the opening period and opening time of the drain valve and the drain valve according to different current intervals, thereby improving the utilization rate of hydrogen.
  • the opening period of the hydrogen exhaust valve is different at different intervals of the current; the opening time of the hydrogen exhaust valve is different at different intervals of the current; the opening period of the drain valve is the same at different current intervals; the opening time of the drain valve is different at different currents The interval, the opening time is different.
  • the opening period of the hydrogen exhaust valve is different in different current intervals; when the opening period is 0 ⁇ 1/4I, the opening period is T1, when the opening period is between 1/4I and 1/2I, the opening period is T2, which is at 1/ At 2I to 3/4I, the turn-on period is T3, and at 3/4I to I, the turn-on period is T4;
  • the opening time of the hydrogen exhaust valve is different in the interval of the current.
  • the opening time is t1, at 1/4I ⁇ 1/2I, the opening time is t2, and at 1/2I ⁇ 3/4I, the opening time is t3, at 3
  • /4I amount ⁇ I amount the opening time is t4;
  • the opening period of the drain valve is the same in different sections of the current, and both are T0.
  • the opening time of the drain valve is different in the interval of the current.
  • the opening time is t5
  • the opening time is t6
  • 1/2I ⁇ 3/4I the opening time is t7, at 3
  • the opening time is t8;
  • the present invention provides a current-based method for controlling the opening frequency of a hydrogen discharge valve and a discharge valve, which adjusts the hydrogen discharge frequency according to different efficiencies, and has a high hydrogen discharge frequency in a high-efficiency interval and a low hydrogen discharge frequency in a low-efficiency interval.
  • Figure 1 is a schematic diagram of the relationship between fuel cell efficiency and current
  • Figure 2 is a schematic diagram of a fuel cell anode drainage hydrogen exhaust system
  • Figure 3 shows the change curve of fuel cell hydrogen discharge cycle and open time with current
  • Figure 4 is a curve of the opening frequency and opening time of the fuel cell drain valve as a function of current
  • Figure 5 shows an example of how the opening frequency and opening time of the fuel cell hydrogen exhaust valve vary with current
  • Figure 6 shows an example of how the opening frequency and opening time of the fuel cell drain valve vary with current.
  • An electric current-based method for controlling the opening frequency of a drain valve and a drain valve controls the opening period and opening time of the drain valve and the drain valve according to different current intervals, thereby improving the utilization rate of hydrogen.
  • the opening period of the hydrogen exhaust valve is different at different intervals of the current; the opening time of the hydrogen exhaust valve is different at different intervals of the current; the opening period of the drain valve is the same at different intervals of the current; the opening time of the drain valve is different at different currents The interval, the opening time is different.
  • the opening period of the hydrogen exhaust valve is different in different current intervals; when the opening period is 0 ⁇ 1/4I, the opening period is T1, when the opening period is between 1/4I and 1/2I, the opening period is T2, which is at 1/ At 2I to 3/4I, the turn-on period is T3, and at 3/4I to I, the turn-on period is T4;
  • the opening time of the hydrogen exhaust valve is different in the interval of the current.
  • the opening time is t1, at 1/4I ⁇ 1/2I, the opening time is t2, and at 1/2I ⁇ 3/4I, the opening time is t3, at 3
  • /4I amount ⁇ I amount the opening time is t4;
  • the opening period of the drain valve is the same in different sections of the current, and both are T0;
  • the opening time of the drain valve is different in the interval of the current.
  • the opening time is t5
  • the opening time is t6
  • 1/2I ⁇ 3/4I the opening time is t7, at 3
  • the opening time is t8;
  • the opening period of the hydrogen exhaust valve is different in different areas of the current; when it is 0 ⁇ 1/4I, the opening period is 20s, when it is 1/4I ⁇ 1/2I, the opening period is 17.5s, and it is at 1/2I. At ⁇ 3/4I rating, the turn-on period is 15s, and at 3/4I ⁇ I rating, the turn-on period is 12.5s;
  • the turn-on time is different.
  • the opening time is 4s, at 1/4I ⁇ 1/2I, the opening time is 3s, at 1/2I ⁇ 3/4I, the opening time is 2s, at 3
  • /4I amount ⁇ I amount the opening time is 1s;
  • the opening period of the drain valve is the same in different areas of current, both are 20s;
  • the opening time of the drain valve is different in the interval of the current. At 0 ⁇ 1/4I, the opening time is 1s, at 1/4I ⁇ 1/2I, the opening time is 2s, at 1/2I ⁇ 3/4I, the opening time is 3s, at 3 When /4I ⁇ I, the opening time is 4s.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un procédé basé sur l'intensité pour commander la fréquence d'ouverture d'une valve d'évacuation d'hydrogène et d'une valve de vidange d'eau. Selon différentes plages d'intensités, les périodes d'ouverture et le temps d'ouverture d'une valve de vidange d'eau et d'une valve d'évacuation d'hydrogène sont respectivement commandés, ce qui permet d'améliorer le taux d'utilisation de l'hydrogène. Pour la période d'ouverture de la valve d'évacuation d'hydrogène, la période d'ouverture est différente dans différentes plages d'intensités, et pour le temps d'ouverture de la valve d'évacuation d'hydrogène, le temps d'ouverture est différent dans les différentes plages d'intensités. Pour la période d'ouverture de la valve de vidange d'eau, la période d'ouverture est la même dans les différentes plages d'intensités, et pour le temps d'ouverture de la valve de vidange d'eau, le temps d'ouverture est différent dans les différentes plages d'intensités.
PCT/CN2020/141496 2020-06-24 2020-12-30 Procédé basé sur l'intensité pour commander la fréquence d'ouverture de valve d'évacuation d'hydrogène et de valve de vidange d'eau WO2021258704A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010588134.5A CN111799488B (zh) 2020-06-24 2020-06-24 一种基于电流的排氢阀和排水阀开启频率控制方法
CN202010588134.5 2020-06-24

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111799488B (zh) * 2020-06-24 2021-09-10 中国第一汽车股份有限公司 一种基于电流的排氢阀和排水阀开启频率控制方法
CN115000462A (zh) * 2021-03-01 2022-09-02 广州汽车集团股份有限公司 一种氢燃料电池系统排水阀的控制方法及装置
CN115224308B (zh) * 2021-06-01 2024-03-26 广州汽车集团股份有限公司 燃料电池氢气回路压力控制方法、装置、车辆及存储介质
CN113793960B (zh) * 2021-09-15 2023-09-01 上海捷氢科技股份有限公司 一种燃料电池排氢方法及装置

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CN111799488A (zh) * 2020-06-24 2020-10-20 中国第一汽车股份有限公司 一种基于电流的排氢阀和排水阀开启频率控制方法

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KR101583914B1 (ko) * 2014-03-25 2016-01-21 현대자동차주식회사 연료전지 시스템의 제어방법
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Publication number Priority date Publication date Assignee Title
JP2016018611A (ja) * 2014-07-04 2016-02-01 株式会社デンソー 燃料電池システム
CN108539222A (zh) * 2018-06-06 2018-09-14 同济大学 一种车载燃料电池多模块并联氢气循环系统及其控制方法
CN110676484A (zh) * 2018-07-03 2020-01-10 上海汽车集团股份有限公司 车辆、燃料电池的氢气循环系统及氢气循环控制方法
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CN110364753A (zh) * 2019-07-26 2019-10-22 东风汽车集团有限公司 一种氢燃料电池的阳极排水控制方法及其排水系统
CN111799488A (zh) * 2020-06-24 2020-10-20 中国第一汽车股份有限公司 一种基于电流的排氢阀和排水阀开启频率控制方法

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