CN116435549A - Fuel cell hydrogen system, control method and fuel cell - Google Patents

Fuel cell hydrogen system, control method and fuel cell Download PDF

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Publication number
CN116435549A
CN116435549A CN202310551778.0A CN202310551778A CN116435549A CN 116435549 A CN116435549 A CN 116435549A CN 202310551778 A CN202310551778 A CN 202310551778A CN 116435549 A CN116435549 A CN 116435549A
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ejector
pressure sensor
pressure
valve
mode
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王肖奎
陈涛
张潇丹
方川
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Beijing Sinohytec Co Ltd
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Beijing Sinohytec Co Ltd
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Priority to CN202310551778.0A priority Critical patent/CN116435549A/en
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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
    • 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
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
    • 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
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04104—Regulation of differential pressures
    • 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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04225—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during start-up
    • 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
    • H01M8/04746—Pressure; Flow
    • 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
    • H01M8/04746—Pressure; Flow
    • H01M8/04776—Pressure; Flow at auxiliary devices, e.g. reformer, compressor, burner
    • 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

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

Abstract

The invention provides a fuel cell hydrogen system, a control method and a fuel cell. Wherein, fuel cell hydrogen system includes: the system comprises an air source, a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor, a fourth pressure sensor, a galvanic pile, a water separator, a first electric control valve, a second electric control valve, a hydrogen circulating pump, a one-way valve, a third electric control valve, a fourth electric control valve and a fifth pressure sensor. The problems of high power consumption, reduced net efficiency, short service life, higher failure rate and reduced pressure at the inlet of the ejector in the prior art are solved.

Description

Fuel cell hydrogen system, control method and fuel cell
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell hydrogen system, a control method and a fuel cell.
Background
The fuel cell engine system is a new type of fuel cell power generation system that converts chemical energy generated by chemical reactions within the device into electrical energy through the electrochemical device. The hydrogen fuel cell engine system is used as an important carrier for hydrogen fuel application, and has the characteristics of no pollution, environmental friendliness and the like. The fuel cell system is complex, mainly comprising hydrogen, air, water, electricity, pile and other subsystems, and the hydrogen subsystem is used as the supply part of the electrochemical reaction of the fuel cell, and the stability and the advancement of the operation of the hydrogen subsystem directly determine the characteristics of the fuel cell engine system.
Currently, the hydrogen subsystem architecture of fuel cell engine systems is mainly divided into two types: first is a hydrogen circulation pump scheme. The hydrogen circulation pump is utilized to boost the unreacted gas of the fuel cell to enter the electric pile again, so that the use efficiency of the hydrogen is improved; the other is a hydrogen ejector scheme. The ejector scheme works by utilizing the Venturi principle, and improves the reliability of the fuel cell engine system in application.
The inventor finds that the following problems exist in the prior art in the process of implementing the technical scheme:
1. the design of a single hydrogen circulating pump requires that the hydrogen pressure at the outlet of a circulating path is compressed and lifted to the target pressure at the inlet of a reactor, and the lifting pressure is relatively high, so that the power consumption is high;
2. the single hydrogen circulating pump has high dependence, no fault tolerance measure, high fault rate of the hydrogen circulating pump and high fault rate of the fuel cell system;
3. in the low-temperature cold start process, the hydrogen circulating pump is easy to cause a state that icing cannot be started, and the service life of the circulating pump can be reduced when the circulating pump breaks ice;
4. when the fuel cell engine is operated at high power, the power consumption of the hydrogen circulating pump is increased along with the improvement of the operating power of the electric pile, so that the net output power of the electric pile is reduced, and the net efficiency is reduced;
5. the scheme that the ejector is connected with the circulating pump in parallel has the problem that the inlet pressure is reduced due to the operation of the circulating pump, so that the inlet flow of the ejector is reduced, and the ejector is caused to flow back seriously.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a fuel cell hydrogen system, a control method and a fuel cell, which at least partially solve the problems of high power consumption, reduced net efficiency, short service life, higher failure rate and reduced pressure at the inlet of an ejector in the prior art.
In a first aspect, embodiments of the present disclosure provide a fuel cell hydrogen system comprising: the system comprises an air source, a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor, a fourth pressure sensor, a galvanic pile, a water separator, a first electric control valve, a second electric control valve, a hydrogen circulating pump, a one-way valve, a third electric control valve, a fourth electric control valve and a fifth pressure sensor;
a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor and a fourth pressure sensor are sequentially arranged between the outlet of the air source and the inlet of the electric pile, the inlet of the second proportional valve is communicated with the inlet of the first proportional valve, and the outlet of the second proportional valve is communicated with the outlet of the ejector;
the electric pile outlet and the reflux port of the ejector are sequentially provided with a water separator, a second electric control valve, a hydrogen circulating pump, a fourth electric control valve and a fifth pressure sensor, the first electric control valve is communicated with the water separator, the one-way valve is arranged between the inlet of the second electric control valve and the inlet of the fourth electric control valve, and the three electric control valves are arranged between the outlet of the hydrogen circulating pump and the outlet of the ejector.
Optionally, the system working mode includes a circulating pump mode, an ejector mode or a circulating pump+ejector mode.
Optionally, when the system is in a circulating pump mode, the gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the gas after the electric pile reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulating pump, the third electric control valve and the fourth pressure sensor to enter the electric pile.
Optionally, when the system is in the ejector mode, the gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the gas after the electric pile reaction sequentially passes through the water separator, the one-way valve and the fourth electric control valve to enter the reflow port of the ejector.
Optionally, when the system is in a mode of a circulating pump and an ejector, the gas in the gas source is divided into two paths, one path sequentially passes through a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor and a fourth pressure sensor to enter the galvanic pile, and the other path sequentially passes through the second proportional valve and the fourth pressure sensor to enter the galvanic pile;
the gas after the reactor reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulating pump, the third electric control valve and the fourth electric control valve to enter the reflux port of the ejector.
In a second aspect, an embodiment of the present disclosure further provides a method for controlling a hydrogen system of a fuel cell, applied to the system in any one of the first aspect, where the method includes:
judging the magnitude of the loading working condition current, and controlling the system to work in a circulating pump mode, an ejector mode or a circulating pump and ejector mode based on the magnitude of the loading working condition current.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is idle current, a first proportional valve is opened, the target pressure P3 of the reactor is regulated, when the actual pressure of the system reaches the target pressure P3 of the reactor, a circulating pump mode is opened, the target rotating speed of the hydrogen circulating pump is set, and when the hydrogen circulating pump reaches the first set rotating speed, the fuel cell carries out current loading.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is small working condition current, a first proportional valve is opened, the target pressure P3 for piling is regulated, when the target pressure for piling is equal to the actual pressure, a hydrogen circulating pump is closed, an ejector is opened, and the pressure of a backflow port of the ejector is set;
when the pressure of the fifth pressure sensor reaches the set range, the fuel cell performs current loading.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is a large working condition current, a first proportional valve and a second proportional valve are opened, the target pressure P2 and the target pressure P4 are regulated, and after the actual pressure of the system reaches the target pressure P2 and the target pressure P4, a circulating pump and ejector mode is opened, and the target rotating speed of the hydrogen circulating pump and the target pressure of an ejector inlet are set;
and when the pressure values detected by the second pressure sensor and the fifth pressure sensor reach the set value, and when the rotating speed of the hydrogen circulating pump reaches the second set rotating speed, the fuel cell carries out current loading.
In a third aspect, embodiments of the present disclosure also provide a fuel cell using the system of any one of the first aspects.
The invention provides a fuel cell hydrogen system, a control method and a fuel cell, wherein the fuel cell hydrogen system has the following effects:
1. the cold start failure in the circulating pump mode can be switched to the start in the ejector mode, so that the reliability of cold start of the electric pile is enhanced.
2. Through the arrangement of the hydrogen circulating pump and the ejector, the problems that the control range of the reflux flow of the ejector is narrow and the circulating flow cannot be accurately regulated in a single ejector are effectively solved; the problem of ejector reflux caused by overlarge flow resistance of a circulating path during idle point operation can be effectively solved.
3. Meanwhile, the hydrogen circulating pump and the ejector are arranged, when the fuel cell engine runs at high power, the ejector is introduced, and the power consumption of the hydrogen circulating pump is not increased along with the improvement of the running power of the electric pile, so that the net output efficiency of the electric pile is improved.
4. By adopting the system of the scheme, the lifting pressure of the hydrogen circulating pump is reduced, the design difficulty of the circulating pump can be reduced, and the power consumption is reduced.
5. The hydrogen circulating pump solves the problem that the circulating flow of the galvanic pile is reduced due to the fact that the inlet of the circulating pump sucks in the outlet gas when the circulating pump works and the problem that the pressure of the inlet of the ejector is reduced due to the fact that the circulating pump works.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
Fig. 1 is a schematic structural diagram of a fuel cell hydrogen system provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a fuel cell hydrogen system according to an embodiment of the present disclosure when operating in a circulation pump mode;
FIG. 3 is a schematic diagram of a fuel cell hydrogen system according to an embodiment of the present disclosure when operating in an ejector mode;
fig. 4 is a schematic structural diagram of a fuel cell hydrogen system according to an embodiment of the present disclosure when the fuel cell hydrogen system is operated in a circulation pump and an ejector;
FIG. 5 is a flow chart of a method of controlling a fuel cell hydrogen system according to an embodiment of the present disclosure;
the system comprises a gas source 1, a pressure reducing valve 2, a safety valve 3, a first pressure sensor 4, a second proportional valve 5, a proportional valve 6, a second pressure sensor 7, an ejector 8, a third pressure sensor 9, a temperature sensor 10, a fourth pressure sensor 11, a galvanic pile 12, a water separator 13, a first electric control valve 14, a second electric control valve 15, a hydrogen circulating pump 16, a one-way valve 17, a third electric control valve 18, a fourth electric control valve 19 and a fifth pressure sensor 20.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
It should be appreciated that the following specific embodiments of the disclosure are described in order to provide a better understanding of the present disclosure, and that other advantages and effects will be apparent to those skilled in the art from the present disclosure. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the disclosure by way of illustration, and only the components related to the disclosure are shown in the illustrations, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
Hydrogen system: an external supply system for electrochemical reaction of fuel cell is responsible for hydrogen supply and hydrogen circulation of anode of fuel cell.
As shown in fig. 1, the present embodiment discloses a fuel cell hydrogen system including: the system comprises an air source, a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor, a fourth pressure sensor, a galvanic pile, a water separator, a first electric control valve, a second electric control valve, a hydrogen circulating pump, a one-way valve, a third electric control valve, a fourth electric control valve and a fifth pressure sensor;
a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor and a fourth pressure sensor are sequentially arranged between the outlet of the air source and the inlet of the electric pile, the inlet of the second proportional valve is communicated with the inlet of the first proportional valve, and the outlet of the second proportional valve is communicated with the outlet of the ejector;
the electric pile outlet and the reflux port of the ejector are sequentially provided with a water separator, a second electric control valve, a hydrogen circulating pump, a fourth electric control valve and a fifth pressure sensor, the first electric control valve is communicated with the water separator, the one-way valve is arranged between the inlet of the second electric control valve and the inlet of the fourth electric control valve, and the three electric control valves are arranged between the outlet of the hydrogen circulating pump and the outlet of the ejector.
Optionally, the system working mode includes a circulating pump mode, an ejector mode or a circulating pump+ejector mode. Each mode can be adjusted according to the actual state of the electric pile in the operation process of the electric pile, so that the problems of high cold start failure rate, high power consumption of a circulating pump, small flow adjusting range of an ejector and the like in the operation process of the electric pile are solved, and the operation reliability of the electric pile is enhanced.
Optionally, as shown in fig. 2, when the system is in a circulating pump mode, the gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the gas after the electric pile reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulating pump, the third electric control valve and the fourth pressure sensor to enter the electric pile.
Optionally, as shown in fig. 3, when the system is in the ejector mode, the gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the gas after the electric pile reaction sequentially passes through the water separator, the one-way valve and the fourth electric control valve to enter the return port of the ejector.
Optionally, as shown in fig. 4, when the system is in a mode of a circulating pump and an ejector, the gas in the gas source is divided into two paths, one path sequentially passes through a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor and a fourth pressure sensor to enter the electric pile, and the other path sequentially passes through the second proportional valve and the fourth pressure sensor to enter the electric pile;
the gas after the reactor reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulating pump, the third electric control valve and the fourth electric control valve to enter the reflux port of the ejector.
As shown in fig. 5, the present embodiment further discloses a control method of a hydrogen system of a fuel cell, including:
judging the magnitude of the loading working condition current, and controlling the system to work in a circulating pump mode, an ejector mode or a circulating pump and ejector mode based on the magnitude of the loading working condition current.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is idle current, a first proportional valve is opened, the target pressure P3 of the reactor is regulated, when the actual pressure of the system reaches the target pressure P3 of the reactor, a circulating pump mode is opened, the target rotating speed of the hydrogen circulating pump is set, and when the hydrogen circulating pump reaches the first set rotating speed, the fuel cell carries out current loading.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is small working condition current, a first proportional valve is opened, the target pressure P3 for piling is regulated, when the target pressure for piling is equal to the actual pressure, a hydrogen circulating pump is closed, an ejector is opened, and the pressure of a backflow port of the ejector is set;
when the pressure of the fifth pressure sensor reaches the set range, the fuel cell performs current loading.
Optionally, the magnitude control system based on the loading working condition current works in a circulating pump mode, an ejector mode or a circulating pump and ejector mode, and comprises:
when the loading working condition current is a large working condition current, a first proportional valve and a second proportional valve are opened, the target pressure P2 and the target pressure P4 are regulated, and after the actual pressure of the system reaches the target pressure P2 and the target pressure P4, a circulating pump and ejector mode is opened, and the target rotating speed of the hydrogen circulating pump and the target pressure of an ejector inlet are set;
and when the pressure values detected by the second pressure sensor and the fifth pressure sensor reach the set value, and when the rotating speed of the hydrogen circulating pump reaches the second set rotating speed, the fuel cell carries out current loading.
I.e. after the fuel cell engine is started, the working mode is selected according to the pulling load current/power of the electric pile. When the device runs under normal working conditions, the idle working conditions can select a circulating pump mode, so that the problem that the ejector ejects backflow amount at an idle point is small or the backflow risk is solved; the ejector mode is selected under the low-current working condition, when the mode is switched, a fourth electric control valve is opened, the second electric control valve and the rotating speed of the hydrogen circulating pump are closed, the third electric control valve is closed, and the air flow control switching is realized through a one-way valve; and the large-current working condition selects an ejector and circulating pump mode, the first proportional valve and the second proportional valve control the pile-in pressure P4, wherein the first proportional valve controls the inlet pressure of the ejector and regulates the circulating flow together with the rotating speed of the circulating pump (fifth pressure sensor). Under a special state, if the cold start fails in a circulating pump mode, the mode can be switched to an ejector mode to carry out the load pulling operation of the electric pile;
the system of the embodiment comprises a circulating pump mode, an ejector mode, an ejector+circulating pump mode and the like, wherein each mode can be stably controlled and switched, and a reasonable mode is selected according to the actual state of a pile system, so that the running stability of the pile is enhanced;
the embodiment also discloses a fuel cell, and the system disclosed by the embodiment is used.
The embodiment also discloses a fuel cell, and the control method disclosed in the embodiment is used.
The basic principles of the present disclosure have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present disclosure are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present disclosure. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, since the disclosure is not necessarily limited to practice with the specific details described.
In this disclosure, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and the block diagrams of devices, apparatuses, devices, systems involved in this disclosure are merely illustrative examples and are not intended to require or implicate that connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
In addition, as used herein, the use of "or" in the recitation of items beginning with "at least one" indicates a separate recitation, such that recitation of "at least one of A, B or C" for example means a or B or C, or AB or AC or BC, or ABC (i.e., a and B and C). Furthermore, the term "exemplary" does not mean that the described example is preferred or better than other examples.
It is also noted that in the systems and methods of the present disclosure, components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered equivalent to the present disclosure.
Various changes, substitutions, and alterations are possible to the techniques described herein without departing from the teachings of the techniques defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the particular aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. The processes, machines, manufacture, compositions of matter, means, methods, or acts, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or acts.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the disclosure to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A fuel cell hydrogen system, comprising: the system comprises an air source, a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor, a fourth pressure sensor, a galvanic pile, a water separator, a first electric control valve, a second electric control valve, a hydrogen circulating pump, a one-way valve, a third electric control valve, a fourth electric control valve and a fifth pressure sensor;
a pressure reducing valve, a safety valve, a first pressure sensor, a first proportional valve, a second pressure sensor, an ejector, a third pressure sensor, a temperature sensor and a fourth pressure sensor are sequentially arranged between the outlet of the air source and the inlet of the electric pile, the inlet of the second proportional valve is communicated with the inlet of the first proportional valve, and the outlet of the second proportional valve is communicated with the outlet of the ejector;
the electric pile outlet and the reflux port of the ejector are sequentially provided with a water separator, a second electric control valve, a hydrogen circulating pump, a fourth electric control valve and a fifth pressure sensor, the first electric control valve is communicated with the water separator, the one-way valve is arranged between the inlet of the second electric control valve and the inlet of the fourth electric control valve, and the three electric control valves are arranged between the outlet of the hydrogen circulating pump and the outlet of the ejector.
2. The fuel cell hydrogen system of claim 1 wherein the system operating modes include a circulation pump mode, an eductor mode, or a circulation pump + eductor mode.
3. The fuel cell hydrogen system of claim 2, wherein when the system is in a circulation pump mode, the gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the gas after the electric pile reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulation pump, the third electric control valve and the fourth pressure sensor to enter the electric pile.
4. The fuel cell hydrogen system of claim 2, wherein when the system is in an ejector mode, gas in the gas source sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and gas after the electric pile reaction sequentially passes through the water separator, the one-way valve and the fourth electric control valve to enter the return port of the ejector.
5. The fuel cell hydrogen system of claim 2, wherein when the system is in a circulating pump plus ejector mode, the gas in the gas source is divided into two paths, one path sequentially passes through the pressure reducing valve, the safety valve, the first pressure sensor, the first proportional valve, the second pressure sensor, the ejector, the third pressure sensor, the temperature sensor and the fourth pressure sensor to enter the electric pile, and the other path sequentially passes through the second proportional valve and the fourth pressure sensor to enter the electric pile;
the gas after the reactor reaction sequentially passes through the water separator, the second electric control valve, the hydrogen circulating pump, the third electric control valve and the fourth electric control valve to enter the reflux port of the ejector.
6. A fuel cell hydrogen system control method applied to the system according to any one of claims 1 to 5, characterized by comprising:
judging the magnitude of the loading working condition current, and controlling the system to work in a circulating pump mode, an ejector mode or a circulating pump and ejector mode based on the magnitude of the loading working condition current.
7. The method according to claim 6, wherein the system for controlling the magnitude of the current based on the loading condition operates in a circulation pump mode, an ejector mode or a circulation pump+ejector mode, and comprises:
when the loading working condition current is idle current, a first proportional valve is opened, the target pressure P3 of the reactor is regulated, when the actual pressure of the system reaches the target pressure P3 of the reactor, a circulating pump mode is opened, the target rotating speed of the hydrogen circulating pump is set, and when the hydrogen circulating pump reaches the first set rotating speed, the fuel cell carries out current loading.
8. The method according to claim 6, wherein the system for controlling the magnitude of the current based on the loading condition operates in a circulation pump mode, an ejector mode or a circulation pump+ejector mode, and comprises:
when the loading working condition current is small working condition current, a first proportional valve is opened, the target pressure P3 for piling is regulated, when the target pressure for piling is equal to the actual pressure, a hydrogen circulating pump is closed, an ejector is opened, and the pressure of a backflow port of the ejector is set;
when the pressure of the fifth pressure sensor reaches the set range, the fuel cell performs current loading.
9. The method according to claim 6, wherein the system for controlling the magnitude of the current based on the loading condition operates in a circulation pump mode, an ejector mode or a circulation pump+ejector mode, and comprises:
when the loading working condition current is a large working condition current, a first proportional valve and a second proportional valve are opened, the target pressure P2 and the target pressure P4 are regulated, and after the actual pressure of the system reaches the target pressure P2 and the target pressure P4, a circulating pump and ejector mode is opened, and the target rotating speed of the hydrogen circulating pump and the target pressure of an ejector inlet are set;
and when the pressure values detected by the second pressure sensor and the fifth pressure sensor reach the set value, and when the rotating speed of the hydrogen circulating pump reaches the second set rotating speed, the fuel cell carries out current loading.
10. A fuel cell characterized by using the system according to any one of claims 1 to 5.
CN202310551778.0A 2023-05-16 2023-05-16 Fuel cell hydrogen system, control method and fuel cell Pending CN116435549A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116706160A (en) * 2023-08-02 2023-09-05 山东美燃氢动力有限公司 Controllable fuel pressure control system of fuel cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116706160A (en) * 2023-08-02 2023-09-05 山东美燃氢动力有限公司 Controllable fuel pressure control system of fuel cell
CN116706160B (en) * 2023-08-02 2023-12-08 山东美燃氢动力有限公司 Controllable fuel pressure control system of fuel cell

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