CN116169319B - Air supply system and control method for air supply system - Google Patents
Air supply system and control method for air supply system Download PDFInfo
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- CN116169319B CN116169319B CN202310196647.5A CN202310196647A CN116169319B CN 116169319 B CN116169319 B CN 116169319B CN 202310196647 A CN202310196647 A CN 202310196647A CN 116169319 B CN116169319 B CN 116169319B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000006722 reduction reaction Methods 0.000 claims description 8
- 238000013507 mapping Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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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
- H01M8/04082—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
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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
- H01M8/04082—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
- H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
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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
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- 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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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The application belongs to the technical field of fuel cells, and particularly relates to an air supply system and a control method of the air supply system. The air supply system includes: the air compressor is used for pressurizing air; the turbocharger is connected with the air compressor; the pressure end bypass valve is positioned at the pressure end of the turbocharger, one end of the pressure end bypass valve is connected with the turbocharger, and the other end of the pressure end bypass valve is connected with the air compressor; and one end of the vortex end bypass valve is connected to a passage between the electric pile and the air compressor, and the other end of the vortex end bypass valve is connected with the vortex end of the turbocharger. The method comprises the following steps: receiving an operating power of the air supply system; converting the operation power into a load working condition of the air compressor; and controlling the on-off of the bypass valve and the vortex end bypass valve according to the load working condition, so that the air supply system operates in a corresponding working interval. The utility model provides a work efficiency that can improve air supply system.
Description
Technical Field
The application belongs to the technical field of fuel cells, and particularly relates to an air supply system and a control method of the air supply system.
Background
The main function of the air supply system of the fuel cell is to supply air with certain pressure to the electric pile, and the core of the air supply system is an air compressor. Under different load working conditions, the air compressor needs to adjust the relation between air flow and pressure ratio according to the pile requirements. The air compressor of the existing fuel cell mostly adopts an electric two-stage centrifugal compressor, which is difficult to simultaneously meet the requirements of different load working conditions. Under the working condition of small load, surge is easy to occur in the case of small flow and high pressure ratio; under the working condition of large load, the high flow and high voltage ratio consumes higher electric power. The air compressor is damaged when surge is serious, the system efficiency is reduced when electric power is high, and the working efficiency of the air supply system is affected by the air compressor and the electric power.
Disclosure of Invention
The invention provides an air supply system and a control method thereof, which are used for improving the working efficiency of the air supply system.
According to an aspect of the embodiments of the present application, there is provided an air supply system for supplying air to a fuel cell, the air supply system including:
the air compressor is used for pressurizing air entering the air compressor;
the pressure end of the turbocharger is connected with the first end of the air compressor and is used for pressurizing air and sending the pressurized air to the air compressor;
the inlet end of the electric pile is connected with the air compressor, the outlet end of the electric pile is connected with the vortex end of the turbocharger, the air compressor and the electric pile are sequentially connected to form a closed loop, and the electric pile is used for carrying out reduction reaction on air output by the air compressor;
the first end of the bypass valve is connected with the second end of the air compressor, and the second end of the bypass valve is connected with the vortex end of the turbocharger and used for circulating air output by the air compressor;
the first end of the pressure end bypass valve is connected with the pressure end of the turbocharger, and the second end of the pressure end bypass valve is connected with the first end of the air compressor;
and a vortex end bypass valve, wherein a first end of the vortex end bypass valve is connected with a passage between the electric pile and the turbocharger, and a second end of the vortex end bypass valve is connected with a vortex end of the turbocharger.
Optionally, the air supply system further comprises:
the first end of the intercooler is connected with the second end of the air compressor;
the first end of the reactor-entering stop valve is connected with the second end of the intercooler, and the second end of the reactor-entering stop valve is connected with the inlet end of the electric reactor;
and the first end of the pile outlet stop valve is connected with the outlet end of the electric pile, and the second end of the pile outlet stop valve is connected with the vortex end of the turbocharger.
Optionally, the air supply system comprises:
the first end of the bypass valve is connected to a passage between the intercooler and the in-stack stop valve;
the first end of the vortex end bypass valve is connected to a passage between the off-stack shut-off valve and the turbocharger.
According to an aspect of the embodiments of the present application, there is provided a control method of an air supply system, the method including:
a turbocharger for pressurizing air;
the air compressor is connected with the turbocharger and is used for pressurizing air output by the turbocharger;
a bypass valve connected with the downstream of the air compressor for adjusting the flow rate of the air output by the air compressor;
the vortex end bypass valve is positioned at the vortex end of the turbocharger and used for controlling the working state of the turbocharger;
the electric pile is characterized in that an inlet end of the electric pile is connected with the air compressor, and an outlet end of the electric pile is connected with the turbocharger and is used for carrying out reduction reaction on air;
the method comprises the following steps:
receiving an operating power of the air supply system;
converting the operation power into a load working condition of the air compressor, wherein the load working condition is the relation between the pressure ratio and the air flow of the air compressor;
and controlling the on-off of the bypass valve and the vortex end bypass valve according to the load working condition, so that the air supply system operates in a corresponding working interval.
The air supply system provided in the embodiment of the application comprises: the air compressor is used for pressurizing air entering the air compressor; one end of the turbocharger is connected with the inlet end of the air compressor; the pressure end bypass valve is positioned at the pressure end of the turbocharger, one end of the pressure end bypass valve is connected with the turbocharger, and the other end of the pressure end bypass valve is connected with the air compressor; the vortex end bypass valve is positioned at the vortex end of the turbocharger, one end of the bypass valve is connected with the turbocharger, and the other end of the bypass valve is connected to a loop between the electric pile and the turbocharger; the galvanic pile is used for carrying out reduction reaction on air. The control method of the air supply system provided by the embodiment of the application comprises the following steps: receiving the operation power of the air supply system and converting the operation power into a load working condition of the air compressor; according to load working conditions, the on-off of the bypass valve and the vortex end bypass valve is controlled, so that the air supply system works in a corresponding working interval; the load working condition refers to the relation between the air flow and the pressure ratio of the air compressor during working; the air supply system is controlled to be on-off of each component element, so that the air compressor can work under each load working condition, the air supply system can keep higher working efficiency and better working performance under different load working conditions, and the working efficiency of the air supply system is further improved to meet the working requirements of a galvanic pile.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 shows a schematic structural diagram of an air supply system according to an embodiment of the present application.
Fig. 2 shows a schematic structural diagram of an air supply system according to another embodiment of the present application.
Fig. 3 is a schematic step flow diagram of a control method of an air supply system according to an embodiment of the present application.
FIG. 4 is a schematic diagram showing on-off states of the air-fuel supply system under the first load condition according to an embodiment of the present application.
FIG. 5 is a schematic diagram showing on-off states of the air-fuel supply system under the second load condition according to an embodiment of the present application.
FIG. 6 is a schematic diagram showing on-off states of the air-fuel supply system under the third load condition according to an embodiment of the present application.
Fig. 7 shows a schematic diagram of an operation region of an air supply system according to an embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
In a fuel cell, the air supply system is used for supplying air with a certain pressure to the electric pile, and oxygen receives electrons from the anode at the cathode of the electric pile and generates water through reduction reaction.
Fig. 1 shows a schematic structural diagram of an air supply system according to an embodiment of the present application.
In the present embodiment, as shown in fig. 1, there is provided an air supply system including:
the air compressor 4 is used for pressurizing the air entering the air compressor 4.
The turbocharger 1, the pressure end of the turbocharger 1 is connected with the first end of the air compressor 4, is used for pressurizing air, and sends the air after being pressurized to the air compressor 4.
The inlet end of the electric pile 9 is connected with the air compressor 4, the outlet end of the electric pile 9 is connected with the vortex end of the turbocharger 1, the air compressor 4 and the electric pile 9 are sequentially connected to form a closed loop, and the electric pile is used for carrying out reduction reaction on air output by the air compressor 4.
The bypass valve 6, the first end of the bypass valve 6 is connected with the second end of the air compressor 4, and the second end of the bypass valve 6 is connected with the vortex end of the turbocharger 1 for circulating the air output by the air compressor 4.
The pressure end bypass valve 2, the first end of the pressure end bypass valve 2 is connected with the pressure end of the turbocharger 1, and the second end of the pressure end bypass valve 2 is connected with the first end of the air compressor 4.
A scroll-side bypass valve 3, a first end of the scroll-side bypass valve 3 is connected to a passage between the stack and the turbocharger 1, and a second end of the scroll-side bypass valve 3 is connected to a scroll-side of the turbocharger 1.
Specifically, in the air supply system, the air compressor 4 is used to pressurize air entering the air compressor 4 and output air with a certain pressure to the electric pile.
In the embodiment of the application, the first-stage turbocharger 1 is added and used for adjusting the working effect of the air supply system under the third load working condition and the first load working condition.
The turbocharger 1 is connected upstream of the air compressor 4, i.e. the pressure end of the turbocharger 1 is connected to the inlet end of the air compressor 4. The outlet end of the electric pile 9 is connected with the vortex end of the turbocharger 1, and the exhaust gas discharged from the outlet end of the electric pile 9 drives the turbine of the turbocharger 1 to enable the turbocharger 1 to work.
The pressure end of the turbocharger 1 is located on the left side of the turbocharger 1 shown in fig. 1, and the turbine end of the turbocharger 1 is located on the right side of the turbocharger 1 shown in fig. 1.
Alternatively, the turbocharger 1 is a centrifugal compressor, and the air compressor 4 is an electric two-stage centrifugal compressor. The centrifugal compressor has the advantages of small noise, high efficiency and small volume, and can effectively improve the working efficiency of the air supply system.
The turbocharger 1 is an air compressor that increases the amount of intake air by compressing air.
The pressure end bypass valve 2 has a first end connected to the pressure end of the turbocharger 1 and a second end connected to a passage between the turbocharger 1 and the air compressor 4. Specifically, the first end of the pressure side bypass valve 2 is connected to the intake pipe on the pressure side of the turbocharger 1.
The scroll-side bypass valve 3 has a first end connected to a passage between the stack 9 and the turbocharger 1 and a second end connected to a scroll-side of the turbocharger 1. Specifically, the turbine end side of the turbocharger 1 is provided with an air outlet end, and the second end of the turbine end bypass valve 3 is connected to the air outlet end of the turbine end side of the turbocharger 1.
Optionally, the pressure end bypass valve 2 is a differential pressure driven valve, and the vortex end bypass valve 3 is an electric butterfly valve.
The bypass valve 6, the first end of the bypass valve 6 is connected to a passage between the outlet end of the air compressor 4 and the inlet end of the stack 9, and the connection of the second end is located on the turbine side of the turbocharger 1, specifically, on the outlet end of the turbine side of the turbocharger 1.
When the bypass valve 6 is opened, the bypass valve 6 is used to circulate the air output from the air compressor 4, so that the flow rate of the air flowing into the stack 9 is reduced. When the bypass valve 6 is closed, the air flow into the stack 9 is related to the air flow out of the air compressor 4.
Optionally, the bypass valve 6 is an electric butterfly valve.
The turbocharger 1 is located upstream of the air compressor 4, the electric pile 9 is located downstream of the air compressor 4, and the outlet end of the electric pile 9 is connected with the turbocharger 1, so that the exhaust gas discharged by the electric pile 9 can drive the turbocharger 1 to drive. A closed circuit is formed among the turbocharger 1, the air compressor 4 and the electric pile 9.
The air supply system provided by the embodiment comprises a pressure end bypass valve 2 and a vortex end bypass valve 3, wherein the pressure end bypass valve 2 is positioned at the pressure end of the turbocharger 1, one end of the pressure end bypass valve 2 is connected with the inlet end of the air compressor 4, and the other end of the pressure end bypass valve is connected with the pressure end of the turbocharger 1. The vortex end bypass valve 3 is located the vortex end of turbo charger 1, the one end of vortex end bypass valve 3 is connected with the return circuit between pile 9 and the turbo charger 1, the other end is connected with the vortex end of turbo charger 1, the break-make of pressure end bypass valve 2 and vortex end bypass valve 3 can influence the operating condition of turbo charger 1, further influence the air flow and the pressure ratio of air in air compressor 4 for air supply system can keep good work effect under various load operating mode, has further improved air supply system's work efficiency, and then satisfies the work demand of pile.
As an alternative embodiment, as shown in fig. 2, the air supply system further includes:
and the first end of the intercooler 5 is connected with the second end of the air compressor.
The first end of the reactor-in stop valve 7 is connected with the second end of the intercooler 5, and the second end of the reactor-in stop valve 7 is connected with the inlet end of the electric reactor 9.
The first end of the stack outlet stop valve 8 is connected with the outlet end of the electric stack 9, and the second end of the stack outlet stop valve 8 is connected with the vortex end of the turbocharger 1.
Specifically, the air supply system further includes an intercooler 5, an in-stack shut-off valve 7, and an out-stack shut-off valve 8.
After the air is compressed by the air compressor 4, the temperature increases. The air with too high temperature is directly connected to the electric pile 9, so that irreversible damage is caused to the proton membrane in the electric pile 9. The intercooler 5 functions to reduce the temperature of the air entering the stack 9, preventing the high temperature air from damaging the stack 9.
Thus, an intercooler 5 is connected after the air compressor 4 to reduce the temperature of the air entering the stack 9. The first end of the intercooler 5 is connected with the second end of the air compressor 4, and the second end of the intercooler 5 is connected with the first end of the in-pile stop valve 7. The second end of the in-stack shut-off valve 7 is connected to the inlet end of the galvanic pile 9.
The air cooled by the intercooler 5 enters the electric pile 9 through the pile-entering stop valve 7.
The stack outlet stop valve 8 is located at the outlet end of the electric stack 9, one end of the stack outlet stop valve 8 is connected with the outlet end of the electric stack 9, and the other end is connected to the vortex end of the turbocharger 1. The stack outlet tail gas discharged by the electric stack 9 is introduced into the vortex end of the turbocharger 1 through the stack outlet stop valve 8, so that the turbine in the vortex end is driven to rotate, and the turbocharger 1 is driven to work.
In the present embodiment, the air supply system includes an intercooler 5, a stack-in shutoff valve 7, and a stack-out shutoff valve 8, which further constitute a complete circuit of the air supply system.
As an alternative embodiment, as shown in fig. 2, the air supply system includes:
the first end of the bypass valve 6 is connected to a passage between the intercooler 5 and the in-stack shutoff valve 7.
The first end of the vortex end bypass valve 3 is connected to the passage between the off-stack shut-off valve 8 and the turbocharger 1.
Specifically, the intercooler 5 is connected to the rear end of the air compressor 4. The first end of the bypass valve 6 is connected to a passage between the intercooler 5 and the in-stack shutoff valve 7, and the second end of the bypass valve 6 is connected to an outlet end of the turbocharger 1 near the turbine end.
When the bypass valve 6 is opened, air discharged from the air compressor 4 enters the intercooler 5 and flows out of the passage of the bypass valve 6, so that the flow rate of air entering the stack 9 decreases.
The first end of the vortex end bypass valve 3 is connected to the passage of the stack outlet stop valve 8 and the turbocharger 1, and the second end of the vortex end bypass valve 3 is connected to the outlet end beside the vortex end of the turbocharger 1. When the turbine-side bypass valve 3 is opened, the off-stack exhaust gas passing through the off-stack shut-off valve 8 is discharged through the turbine-side bypass valve 3, and thus the flow rate of the exhaust gas entering the turbocharger 1 is reduced, and thus the operation efficiency of the turbocharger 1 is affected.
In the present embodiment, the mounting positions of the bypass valve 6 and the vortex side bypass valve 3 are set according to the characteristics of the air supply system. Based on the use requirement of the load working condition, the on-off of the bypass valve 6 and the vortex end bypass valve 3 is controlled, so that the working states of the air compressor 4 and the turbocharger 3 are changed, and the working interval of the air supply system is adjusted, so that the air supply system can adapt to different load working conditions and can ensure higher working efficiency.
In the present embodiment, there is provided a control method of an air supply system, as shown in fig. 2, including:
a turbocharger 1 for pressurizing air.
And an air compressor 4 connected to the turbocharger 2 for pressurizing air output from the turbocharger 2.
And a bypass valve 6 connected downstream of the air compressor 4 for adjusting the flow rate of the air output from the air compressor 4.
And the vortex end bypass valve 3 is positioned at the vortex end of the turbocharger 1 and is used for controlling the working state of the turbocharger 1.
And the electric pile 9 is connected with the air compressor 4 at the inlet end and the turbocharger 1 at the outlet end, and is used for carrying out reduction reaction on air.
The air is first pressurized at the pressure end of the turbocharger 1 and then flows through the air compressor 4, and the temperature and pressure of the air are raised again.
Optionally, the air compressor 4 is connected with the intercooler 5 and the pile-entering stop valve 7, and air after being pressurized by the air compressor 4 is cooled by the intercooler 5 and then enters the pile 9 for reaction.
The exhaust gas after the reaction of the electric pile 9 is discharged to the turbine end of the turbocharger 1.
Further, the bypass valve 6 is connected downstream of the air compressor 4, and when the bypass valve 6 is opened, air discharged from the air compressor 4 is discharged through the bypass valve 6, so that the air flow rate flowing into the stack 9 is reduced.
The turbo-end bypass valve 3 is located on the turbo-end side of the turbocharger 1. One end of the turbine-end bypass valve 3 is connected to the outlet end of the turbine end of the turbocharger 1, and the other end is connected to a passage between the outlet end of the stack 9 and the turbine end of the turbocharger 1.
When the turbo-end bypass valve 3 is opened, the exhaust gas discharged from the stack 9 is discharged through the passage of the turbo-end bypass valve 3 instead of entering the turbo-end of the turbocharger 1.
The function of the air supply system is to supply the stack 9 with sufficient air at a certain pressure to meet the power required by the fuel cell.
The air supply system provided by the embodiment of the application is used for supplying air to the fuel cell. The stack 9 is a place where an electrochemical reaction occurs, and is a core part of the fuel cell power system.
The control method provided in this embodiment will be described below with reference to the configuration of the air supply system shown in fig. 2.
Fig. 3 is a flowchart showing the steps of a control method of the air supply system provided in the present embodiment.
As shown in fig. 3, the control method of the air supply system provided in this embodiment includes:
s10, receiving the operation power of the air supply system.
Specifically, the operating power of the air supply system refers to the operating strength of the air supply system, which is related to the air intake demand of the air supply system.
First, the fuel cell controller receives the operation power of the fuel cell, and obtains the operation power of the air supply system based on the relationship between the operation power of the fuel cell and the intake air demand of the air supply system.
S20, converting the operation power into a load working condition of the air compressor, wherein the load working condition is the relation between the pressure ratio and the air flow of the air compressor.
Specifically, the operating power of the air supply system is converted into the load condition of the air compressor.
The intake air demand of the air supply system eventually breaks down to the air flow and air pressure required for the electrochemical reaction of the stack.
Thus, the load conditions of the air compressor are actually related to the air flow rate and the air pressure required by the stack.
The operation power of the air supply system and the load working condition of the air compressor have a mapping relation. The different load conditions can be divided according to the range of values of the operating power.
S30, controlling the on-off of the bypass valve and the vortex end bypass valve according to the load working condition, so that the air supply system operates in a corresponding working interval.
Specifically, the on-off of the bypass valve and the vortex end bypass valve is controlled according to the load working condition. The operation power of the air compressor is adjusted by controlling the on-off of the bypass valve and the vortex end bypass valve, the air flow entering the electric pile is influenced, the corresponding load working condition is met, the air supply system works in a working interval corresponding to the load working condition, and the working efficiency of the air supply system meets the working requirement of the electric pile.
The working range of the air supply system corresponds to the load working condition of the air compressor, and is finally decomposed into the relation of air flow and pressure ratio.
In this embodiment, the operation power of the air supply system is received and converted into the load working condition of the air compressor, and the on-off of the bypass valve and the vortex end bypass valve are controlled according to the corresponding load working condition, so that the working efficiency of the turbocharger and the air compressor is affected, the air supply system works in a working interval corresponding to the load working condition, the operable area of the air compressor is widened to a certain extent, the air supply system can maintain higher working efficiency under various load working conditions, and the working requirements of a galvanic pile can be met.
As an alternative embodiment, in S20, converting the operation power into the load condition of the air compressor includes:
and converting the operating power into the load working condition of the air compressor according to the mapping relation between the operating power and the load working condition.
Specifically, a mapping relation exists between the operation power and the load working condition, and the operation power is converted into the load working condition of the air compressor according to the mapping relation.
The method comprises the steps of carrying out off-line test calibration, dividing load working conditions according to the actual running power of the fuel cell and the working state of the air compressor, and obtaining corresponding dividing thresholds. When the value of the running power meets the dividing threshold value of a certain load working condition, the running power can be converted into a corresponding load working condition.
In this embodiment, according to the mapping relationship between the operating power and the load working condition, the operating power is converted into the load working condition of the air compressor, and the on-off of the components in the air supply system can be adjusted more flexibly according to the load working condition, so that the air compressor can ensure a better working effect, and the working efficiency of the air supply system is improved to a certain extent.
As an alternative embodiment, the load conditions include a first load condition, a second load condition, and a third load condition. In step S30, according to the load condition, the on-off of the bypass valve and the vortex end bypass valve is controlled, so that the air supply system operates in a corresponding working interval, including:
and controlling the bypass valve and the vortex end bypass valve to be opened or closed according to the corresponding load working conditions so as to control the working state of the turbocharger.
The air supply system is operated in an operating region corresponding to the load condition by the turbocharger.
Specifically, the load conditions in the embodiments of the present application include a first load condition, a second load condition, and a third load condition.
And after the operation power is converted to obtain the corresponding load working condition, the bypass valve and the vortex end bypass valve are controlled to be opened or closed according to the corresponding load working condition, so that the working state of the turbocharger is controlled. The flow and the pressure of air entering the electric pile are further influenced by the turbocharger, so that the air supply system works in a working area corresponding to a load working condition, and further the working requirement of the electric pile is met.
In the present embodiment, the operation state of the turbocharger is referred to as whether the turbocharger is operating or not by controlling the opening or closing of the bypass valve and the turbo-end bypass valve. The working state of the air compressor at the downstream of the turbocharger is related to the working state of the turbocharger, so that the air supply system can adapt to the working strength of each load working condition, the working efficiency is ensured, and the working requirement of a pile is met.
As an alternative embodiment, the load condition is a first load condition. In step S30, according to the load condition, the on-off of the bypass valve and the vortex end bypass valve is controlled, so that the air supply system operates in a corresponding working interval, including:
s41, controlling the vortex end bypass valve and the bypass valve to be opened so as to control the turbocharger to stop working.
S42, adjusting the working efficiency of the air compressor through the turbocharger.
S43, the air supply system is operated in an operation region corresponding to the first load working condition through the air compressor.
It should be noted that the pressure ratio of the air compressor is an important parameter of the air compressor, and refers to the ratio of the outlet pressure to the inlet pressure of the air compressor.
FIG. 4 shows the on-off state of the air supply system when the load condition is the first load condition.
Specifically, if the load condition corresponding to the operation power of the air supply system is the first load condition, the vortex side bypass valve 3 and the bypass valve 6 are controlled to be opened.
At this time, after the turbo-end bypass valve 3 is opened, air does not enter the turbo end of the turbocharger 1, and the turbine cannot rotate, so that the turbocharger 1 does not operate, and thus no supercharging is performed.
Air enters the air compressor 4 through the pressure end of the turbocharger 1, the air compressor 4 pressurizes the air, and the working efficiency of the air compressor 4 is adjusted to achieve the pressure ratio required by the first load working condition, so that the air meets the working range corresponding to the first load working condition, and further the working requirement of the electric pile in the first load working condition is achieved.
After the bypass valve 6 is opened, the portion of the pressurized air discharged through the air compressor 4 is discharged from the bypass valve 6, and therefore the flow rate of the air into the stack 9 becomes small, and the pressure ratio of the air compressor 4 is also directed toward the high pressure ratio.
The operation region of the air supply system corresponds to the operation region of the air compressor 4, and is described in detail below with reference to fig. 7.
Fig. 7 is a schematic view showing an intake characteristic of the stack in an operation region of the air compressor 4. The rotational speed, flow and pressure ratio of the air compressor 4 are closely coupled, and the operation area thereof is mainly limited by the surge line, the rotational speed line and the blockage line.
When the load condition is the first load condition, the air intake characteristic of the electric pile 9 is represented in that the operation area of the air compressor 4 is the area 1 in fig. 7, the air flow entering the electric pile 9 is smaller, the air pressure ratio is higher, the operation effect of the air compressor 4 shows a small flow high pressure ratio, and the operation area of the air compressor 4 where surge occurs is effectively avoided.
In this embodiment, by controlling the opening of the vortex end bypass valve 3 and the bypass valve 6, the turbocharger 1 is controlled to stop working, and then the operation power of the air compressor 4 is adjusted, so that the air intake characteristic of the electric pile 9 satisfies the working interval corresponding to the first load working condition, the air compressor 4 in the air supply system can be ensured to adapt to the first load working condition and no surge occurs, the working efficiency of the air supply system is improved to a certain extent, and further the working requirement of the electric pile in the first load working condition is satisfied.
As an optional implementation manner, the load condition is a second load condition, and in step S30, the on-off of the bypass valve and the vortex end bypass valve is controlled according to the load condition, so that the air supply system operates in a corresponding working interval, including:
s51, controlling the bypass valve to be closed.
S52, controlling the opening of the vortex end bypass valve to stop the turbocharger.
And S53, adjusting the rotation speed of the air compressor to increase the pressure ratio of the air compressor.
S54, the air supply system is operated in an operation region corresponding to the second load working condition through the air compressor.
FIG. 5 shows the on-off state of the air supply system when the load condition is the second load condition.
Specifically, when the load condition is the second load condition, the bypass valve 6 is controlled to be closed and the vortex end bypass valve 3 is controlled to be opened.
When the turbo-end bypass valve 3 is opened, air does not enter the turbo-end of the turbocharger 1, and thus the turbocharger 1 stops operating.
At this time, air enters the air compressor 4 through the pressure end of the turbocharger 1, and the rotation speed of the air compressor 4 is controlled so as to meet the pressure ratio required by the second load working condition.
In general, the higher the rotational speed of the air compressor 4, the greater the pressure ratio, with the air flow rate entering the air compressor 4 unchanged.
At this point, the bypass valve 6 is closed, so that the air flow into the stack 9 is increased compared to the first load condition, and the operating demand of the stack 9 is matched to the second load condition.
When the load condition is the second load condition, the air intake characteristic of the electric pile 9 is represented in that the operation area of the air compressor 4 is the area 2 in fig. 7, the air flow entering the electric pile 9 is obviously increased, the numerical value of the pressure ratio is higher, the operation effect of the air compressor 4 is represented by decoupling the flow and the pressure ratio, and the operation effect is more efficient.
In this embodiment, the bypass valve 6 is controlled to be closed, and the vortex end bypass valve 3 is controlled to be opened, so that the working state of the turbocharger 1 is controlled, the rotation speed of the air compressor 4 is adjusted on the basis of ensuring that the air flow is not reduced, the pressure ratio of the air compressor 4 is improved, and the air supply system is operated in a safe and efficient direction as a whole.
As an alternative embodiment, as shown in fig. 2, the air supply system further includes:
the stack outlet stop valve 8 is connected with the outlet end of the electric stack 9 and is used for adjusting the pressure ratio of the electric stack 9.
After adjusting the rotational speed of the air compressor, the method further comprises:
and controlling the opening and closing angles of valves of the stack stop valves to enable the air supply system to work in a working interval corresponding to the second load working condition.
Further, the pile outlet stop valve 8 is connected with the outlet end of the pile 9 and is used for adjusting the voltage ratio of the pile 9 and meeting the working requirement of the pile 9 under the second load working condition.
Optionally, the air supply system is operated in a working area corresponding to the second load working condition by controlling the opening and closing angle of the valve of the stack stop valve 8, so as to meet the working requirement of the electric stack 9.
As an optional implementation manner, the load condition is a third load condition, and in step S30, the on-off of the bypass valve and the vortex end bypass valve is controlled according to the load condition, so that the air supply system operates in a corresponding working interval, including:
and S61, controlling the vortex end bypass valve and the bypass valve to be closed, enabling the turbocharger to work, and carrying out primary supercharging on air through the turbocharger.
And S62, controlling the air compressor to boost the air output by the turbocharger, so that the air supply system works in a working area corresponding to the third load working condition.
FIG. 6 shows the on-off state of the air supply system when the load condition is the third load condition. The pressure side bypass valve 2 in this embodiment is a differential pressure driven valve.
Specifically, when the load condition is the third load condition, the control vortex end bypass valve 3 and the bypass valve 6 are closed.
When the vortex end bypass valve 3 is closed, the gas discharged after the reaction of the electric pile 9 enters the vortex end of the turbocharger 1 through the pile outlet stop valve 8, so that the turbine in the vortex end is driven to rotate, and the turbocharger 1 starts to work. Because the pressure end bypass valve 2 is a differential pressure valve, when the turbine of the turbocharger 1 rotates, a front-back differential pressure is formed on the pressure end bypass valve 2, so that the pressure end bypass valve 2 is closed, and a first-stage supercharging is formed. The pressurized air enters the air compressor 4, and two ends of the air compressor 4 are subjected to secondary pressurization, so that three-stage pressurization is realized.
After the bypass valve 6 is closed, the air subjected to three-stage supercharging enters the electric pile 9, so that the working efficiency of the air supply system is improved, and the working requirement of the electric pile 9 under the third load working condition can be met.
When the load condition is the third load condition, the intake characteristic of the stack 9 is represented in the region 3 in fig. 7 of the operation region of the air compressor 4. The intake characteristic of the stack 9 exhibits the effect of a large flow rate to high pressure ratio.
In this embodiment, the bypass valve 6 and the vortex end bypass valve 3 are controlled to be closed, so as to adjust the working state of the air supply system, so as to meet the requirement of the electric pile 9 under the third load working condition, and the requirement of high running power can be met on the basis of no extra consumption of electric power, thereby further improving the working efficiency of the air supply system.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit, in accordance with embodiments of the present application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. An air supply system for providing air to a fuel cell, the air supply system comprising:
the air compressor is used for pressurizing air entering the air compressor;
the pressure end of the turbocharger is connected with the first end of the air compressor and is used for pressurizing air and sending the pressurized air to the air compressor;
the inlet end of the electric pile is connected with the air compressor, the outlet end of the electric pile is connected with the vortex end of the turbocharger, the air compressor and the electric pile are sequentially connected to form a closed loop, and the electric pile is used for carrying out reduction reaction on air output by the air compressor;
the first end of the bypass valve is connected with the second end of the air compressor, and the second end of the bypass valve is connected with the vortex end of the turbocharger and used for circulating air output by the air compressor;
the first end of the pressure end bypass valve is connected with the pressure end of the turbocharger, and the second end of the pressure end bypass valve is connected with the first end of the air compressor;
and a vortex end bypass valve, wherein a first end of the vortex end bypass valve is connected with a passage between the electric pile and the turbocharger, and a second end of the vortex end bypass valve is connected with a vortex end of the turbocharger.
2. The air supply system of claim 1, further comprising:
the first end of the intercooler is connected with the second end of the air compressor;
the first end of the reactor-entering stop valve is connected with the second end of the intercooler, and the second end of the reactor-entering stop valve is connected with the inlet end of the electric reactor;
and the first end of the pile outlet stop valve is connected with the outlet end of the electric pile, and the second end of the pile outlet stop valve is connected with the vortex end of the turbocharger.
3. The air supply system according to claim 2, characterized in that the air supply system comprises:
the first end of the bypass valve is connected to a passage between the intercooler and the in-stack stop valve;
the first end of the vortex end bypass valve is connected to a passage between the off-stack shut-off valve and the turbocharger.
4. A control method of an air supply system, characterized in that the air supply system comprises:
a turbocharger for pressurizing air;
the air compressor is connected with the turbocharger and is used for pressurizing air output by the turbocharger;
a bypass valve connected with the downstream of the air compressor for adjusting the flow rate of the air output by the air compressor;
the vortex end bypass valve is positioned at the vortex end of the turbocharger and used for controlling the working state of the turbocharger;
the electric pile is characterized in that an inlet end of the electric pile is connected with the air compressor, and an outlet end of the electric pile is connected with the turbocharger and is used for carrying out reduction reaction on air;
the method comprises the following steps:
receiving an operating power of the air supply system;
converting the operation power into a load working condition of the air compressor, wherein the load working condition is a relation between the pressure ratio and the air flow of the air compressor, and comprises a first load working condition, a second load working condition and a third load working condition;
according to the corresponding load working conditions, the bypass valve and the vortex end bypass valve are controlled to be opened or closed so as to control the working state of the turbocharger;
and operating the air supply system in an operating region corresponding to the load working condition through the turbocharger.
5. The method of claim 4, wherein said converting said operating power to a load condition of said air compressor, comprises:
and converting the operating power into the load working condition of the air compressor according to the mapping relation between the operating power and the load working condition.
6. The method according to claim 4, wherein when the load condition is a first load condition, the controlling the bypass valve and the vortex side bypass valve according to the load condition to make the air supply system operate in a corresponding working range includes:
controlling the vortex end bypass valve and the bypass valve to be opened so as to control the turbocharger to stop working;
adjusting the working state of the air compressor through the turbocharger;
and the air supply system works in a working area corresponding to the first load working condition through the air compressor.
7. The method according to claim 4, wherein when the load condition is a second load condition, the controlling the bypass valve and the vortex side bypass valve according to the load condition to make the air supply system operate in a corresponding working range includes:
controlling the bypass valve to be closed;
controlling the vortex end bypass valve to be opened so as to stop the turbocharger;
adjusting the rotation speed of the air compressor to increase the pressure ratio of the air compressor;
and the air supply system works in a working area corresponding to the second load working condition through the air compressor.
8. The method of controlling an air supply system according to claim 7, wherein the air supply system further comprises:
the pile outlet stop valve is connected with the outlet end of the pile and is used for adjusting the pressure ratio of the pile;
after adjusting the rotational speed of the air compressor, the method further includes:
and controlling the opening and closing angles of valves of the pile-outlet stop valves to enable the air supply system to work in a working interval corresponding to the second load working condition.
9. The method according to claim 4, wherein when the load condition is a third load condition, the controlling the bypass valve and the vortex side bypass valve according to the load condition to make the air supply system operate in a corresponding working interval includes:
the vortex end bypass valve and the bypass valve are controlled to be closed, so that the turbocharger works, and air is subjected to primary supercharging through the turbocharger;
and controlling the air compressor to boost the air output by the turbocharger, so that the air supply system works in a working interval corresponding to a third load working condition.
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| CN202310196647.5A CN116169319B (en) | 2023-03-01 | 2023-03-01 | Air supply system and control method for air supply system |
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| CN202310196647.5A CN116169319B (en) | 2023-03-01 | 2023-03-01 | Air supply system and control method for air supply system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485469A (en) * | 2014-12-30 | 2015-04-01 | 清华大学 | Waste heat and pressure utilization-based fuel cell air supply system |
| CN112421075A (en) * | 2020-11-17 | 2021-02-26 | 一汽解放汽车有限公司 | Air supply system of fuel cell engine |
| CN115621497A (en) * | 2021-07-14 | 2023-01-17 | 北京亿华通科技股份有限公司 | Fuel cell system with energy recovery capability and control method |
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- 2023-03-01 CN CN202310196647.5A patent/CN116169319B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485469A (en) * | 2014-12-30 | 2015-04-01 | 清华大学 | Waste heat and pressure utilization-based fuel cell air supply system |
| CN112421075A (en) * | 2020-11-17 | 2021-02-26 | 一汽解放汽车有限公司 | Air supply system of fuel cell engine |
| CN115621497A (en) * | 2021-07-14 | 2023-01-17 | 北京亿华通科技股份有限公司 | Fuel cell system with energy recovery capability and control method |
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