CN111725546A - Test system and test method for fuel cell stack working condition - Google Patents
Test system and test method for fuel cell stack working condition Download PDFInfo
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- CN111725546A CN111725546A CN202010616238.2A CN202010616238A CN111725546A CN 111725546 A CN111725546 A CN 111725546A CN 202010616238 A CN202010616238 A CN 202010616238A CN 111725546 A CN111725546 A CN 111725546A
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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
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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
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a system and a method for testing the working condition of a fuel cell stack, which realize the control of the pressure and the flow of hydrogen entering the fuel cell stack by adjusting the action strategies of a hydrogen bypass pressure regulating valve and a hydrogen exhaust electromagnetic valve, and realize the control of the pressure and the flow of ambient air entering the fuel cell stack by adjusting the action strategies of an air compressor and an exhaust back pressure valve. That is to say, this test system can be fast accurate controls hydrogen and the pressure and the flow of air, combines the hydrogen circulating pump simultaneously, can simulate the circulation of hydrogen to furthest's reproduction galvanic pile is in the dynamic behavior of fuel cell system.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a system and a method for testing the working condition of a fuel cell stack.
Background
The proton exchange membrane fuel cell, also called as a fuel cell, is considered to be a new energy power generation system which is intensively developed in the future due to its advantages of environmental friendliness, high energy conversion rate, no noise, rapid response and the like.
The fuel cell uses hydrogen and air as reactant gases of an anode and a cathode respectively, and generates electric energy through electrochemical reaction. In a fuel cell development project, a fuel cell stack is often taken as a tested object, and hydrogen and air are supplied to the fuel cell stack through a certain device and a control strategy to simulate the working state of the fuel cell stack in a fuel cell system.
Traditional galvanic pile test system all designs to the galvanic pile work demand under the steady state, and the stability of admitting air of hydrogen and air is high, needs to guarantee stability and the accuracy of parameters such as temperature, humidity, pressure and flow under the steady state as far as possible.
With the development of fuel cell technology and the promotion of commercialization, more and more attention is paid to the simulation test requirement of the actual working condition of the stack in the fuel cell research and development process.
Therefore, the technical problem to be solved by the technical staff in the field is how to accurately simulate the working state of the fuel cell stack under the working condition of the whole vehicle and accurately and quickly control the parameters of hydrogen and air to be attached to the actual working condition to the maximum extent.
Disclosure of Invention
In view of the above, in order to solve the above problems, the present invention provides a system and a method for testing the operating condition of a fuel cell stack, and the technical scheme is as follows:
a system for testing the operating conditions of a fuel cell stack, the system comprising: a compressed hydrogen gas passage and an air passage;
the compressed hydrogen passage includes: a first shunt; the first shunt includes: the hydrogen inlet electromagnetic valve, the hydrogen bypass pressure regulating valve, the hydrogen path three-way valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve;
compressed hydrogen enters a hydrogen cavity of the fuel cell stack after sequentially passing through the hydrogen inlet electromagnetic valve, the hydrogen bypass pressure regulating valve and the hydrogen path three-way valve, hydrogen discharged by the fuel cell stack enters the hydrogen cavity of the fuel cell stack again through the hydrogen circulating pump for cyclic utilization, and nitrogen accumulated in the fuel cell stack is discharged through the hydrogen discharge electromagnetic valve;
the air passage includes: an ambient air passageway; the ambient air passage includes: the air filter, the air bypass flow meter, the air compressor, the intercooler, the first three-way valve of the air path and the evacuation back pressure valve;
the ambient air sequentially passes through the air filter, the air bypass flow meter, the air compressor, the intercooler and the first three-way valve of the air path and then enters the cavity of the fuel cell stack, and the air exhausted by the fuel cell stack is exhausted through the evacuation back pressure valve;
the control of the pressure and the flow of the hydrogen entering the fuel cell stack is realized by adjusting the action strategies of the hydrogen bypass pressure regulating valve and the hydrogen exhaust electromagnetic valve, and the control of the pressure and the flow of the ambient air entering the fuel cell stack is realized by adjusting the action strategies of the air compressor and the exhaust back pressure valve.
Preferably, in the above test system, the compressed hydrogen passage further includes: a second branch circuit;
the second branch comprises: the hydrogen quality flow controller, the hydrogen humidifying tank, the hydrogen heater and the hydrogen exhaust back pressure valve;
compressed hydrogen sequentially enters a hydrogen cavity of the fuel cell stack after passing through the hydrogen inlet electromagnetic valve, the hydrogen mass flow controller, the hydrogen humidifying tank, the hydrogen heater and the hydrogen path three-way valve, and hydrogen discharged by the fuel cell stack is discharged through the hydrogen discharge back pressure valve.
Preferably, in the above test system, the air passage further includes: a compressed air passage;
the compressed air passage includes: the air inlet electromagnetic valve, the air mass flow controller, the air humidifying tank, the air heater and the air channel second three-way valve;
compressed air sequentially passes through the air inlet electromagnetic valve, the air mass flow controller, the air humidifying tank, the air heater, the air path second three-way valve and the air path first three-way valve and then enters the cavity of the fuel cell stack, and air exhausted by the fuel cell stack is exhausted through the evacuation back pressure valve.
Preferably, in the above test system, the air inlet of the air humidification tank is connected to the second three-way valve of the air path.
Preferably, in the above test system, the hydrogen discharge solenoid valve is opened in a periodic strategy to discharge nitrogen gas accumulated inside the fuel cell stack.
A method of testing the operating conditions of a fuel cell stack, the method comprising:
calibrating the air passage and the compressed hydrogen passage of each working point to obtain an air passage working strategy and a compressed hydrogen passage working strategy;
sequentially implementing an air passage working strategy and a compressed hydrogen passage working strategy obtained at all working condition points by an automatic operation program according to a preset time step to obtain an initial test result;
and adjusting the working strategy of the air passage and the working strategy of the compressed hydrogen passage according to the initial test result to obtain a target working strategy of the air passage and a target working strategy of the compressed hydrogen passage.
Preferably, in the above test method, the calibrating the air passage and the compressed hydrogen passage at each operating point to obtain the air passage operating strategy and the compressed hydrogen passage operating strategy includes:
setting a target ambient air intake pressure and a target ambient air intake flow rate;
calibrating the working strategies of an air compressor and an evacuation back pressure valve according to the target ambient air inlet pressure and the target ambient air inlet flow rate to obtain an ambient air passage working strategy;
setting a pressure difference between the compressed hydrogen and air;
and calibrating the working strategies of the hydrogen bypass pressure regulating valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve according to the pressure difference to obtain a working strategy of a compressed hydrogen passage.
Preferably, in the above test method, the calibrating the air passage and the compressed hydrogen passage at each operating point includes:
setting a target compressed air inlet pressure and a target compressed air inlet flow rate;
controlling an air mass flow controller to bring the flow of compressed air to the target compressed air intake flow rate and controlling an evacuation backpressure valve to bring the pressure of compressed air to the target compressed air intake pressure;
setting a target compressed hydrogen inlet pressure and a target compressed hydrogen inlet flow rate;
and controlling a hydrogen mass flow controller to enable the flow of the compressed hydrogen to reach the target compressed hydrogen inlet flow, and controlling a hydrogen discharge back pressure valve to enable the pressure of the compressed hydrogen to reach the target compressed hydrogen inlet pressure.
Compared with the prior art, the invention has the following beneficial effects:
according to the fuel cell stack working condition testing system provided by the invention, the pressure and the flow of hydrogen entering the fuel cell stack are controlled by adjusting the action strategies of the hydrogen bypass pressure regulating valve and the hydrogen exhaust electromagnetic valve, and the pressure and the flow of ambient air entering the fuel cell stack are controlled by adjusting the action strategies of the air compressor and the evacuation back pressure valve. That is to say, this test system can be fast accurate controls hydrogen and the pressure and the flow of air, combines the hydrogen circulating pump simultaneously, can simulate the circulation of hydrogen to furthest's reproduction galvanic pile is in the dynamic behavior of fuel cell system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for testing the operating condition of a fuel cell stack according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another fuel cell stack condition testing system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a system for testing the operating condition of a fuel cell stack according to another embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for testing the operating condition of a fuel cell stack according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a system for testing the operating condition of a fuel cell stack according to an embodiment of the present invention.
The test system comprises: a compressed hydrogen gas passage and an air passage.
The compressed hydrogen passage includes: a first shunt; the first shunt includes: a hydrogen inlet electromagnetic valve 11, a hydrogen bypass pressure regulating valve 12, a hydrogen path three-way valve 13, a hydrogen circulating pump 14 and a hydrogen discharge electromagnetic valve 15;
the compressed hydrogen enters a hydrogen cavity of a fuel cell stack 16 after passing through the hydrogen inlet electromagnetic valve 11, the hydrogen bypass pressure regulating valve 12 and the hydrogen path three-way valve 13 in sequence, the hydrogen discharged from the fuel cell stack 16 enters the hydrogen cavity of the fuel cell stack 16 again through the hydrogen circulating pump 14 for recycling, and meanwhile, the nitrogen accumulated in the fuel cell stack 16 is discharged through the hydrogen discharge electromagnetic valve 15;
the air passage includes: an ambient air passageway; the ambient air passage includes: an air filter 17, an air bypass flow meter 18, an air compressor 19, an intercooler 20, an air path first three-way valve 21 and an evacuation backpressure valve 22;
the ambient air sequentially passes through the air filter 17, the air bypass flow meter 18, the air compressor 19, the intercooler 20 and the air path first three-way valve 21 and then enters the cavity of the fuel cell stack 16, and the air discharged by the fuel cell stack 16 is discharged through the evacuation back pressure valve 22;
wherein the control of the pressure and flow rate of the hydrogen gas entering the fuel cell stack 16 is realized by adjusting the operation strategies of the hydrogen bypass pressure regulating valve 12 and the hydrogen exhaust solenoid valve 15, and the control of the pressure and flow rate of the ambient air entering the fuel cell stack 16 is realized by adjusting the operation strategies of the air compressor 19 and the exhaust back pressure valve 22.
In this embodiment, the test system can rapidly and accurately control the pressure and flow of hydrogen and air by adjusting the operation strategies of the hydrogen bypass pressure regulating valve 12 and the hydrogen exhaust solenoid valve 15, and by adjusting the operation strategies of the air compressor 19 and the exhaust back pressure valve 22, and can simulate the circulation of hydrogen by combining with a hydrogen circulating pump, thereby maximally reproducing the dynamic operation condition of the stack in the fuel cell system.
Specifically, based on the above test system (a dynamic condition test system using an air compressor (ambient air passage) and a compressed hydrogen passage in a circulation and pulse mode), the corresponding test method may be: discretizing the dynamic working condition data of the fuel cell system by preset time step, for example, discretizing by 10 ms-1000 ms, and calibrating the ambient air passage and the compressed hydrogen passage of each working condition point.
Setting a target ambient air intake pressure and a target ambient air intake flow rate; calibrating the working strategies of an air compressor and an evacuation back pressure valve according to the target ambient air inlet pressure and the target ambient air inlet flow rate to obtain an ambient air passage working strategy; setting a pressure difference between the compressed hydrogen and air; and calibrating the working strategies of the hydrogen bypass pressure regulating valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve according to the pressure difference to obtain a working strategy of a compressed hydrogen passage.
That is, the air compressor 19 may be preset to a predetermined rotation speed, and the back pressure of the entire ambient air passage may be controlled by evacuating the opening degree of the back pressure valve 22, thereby controlling the pressure inside the fuel cell stack.
When the pressure reaches the target ambient air intake pressure, the rotation speed of the air compressor 19 is adjusted to achieve the required air intake flow rate, i.e., the target ambient air intake flow rate.
This procedure is a procedure for calibrating the operating strategy of the air compressor 19 and the evacuation back-pressure valve 22, resulting in an operating strategy of the ambient air passage.
It should be noted that if the set pressure changes due to the changing rotation speed of the air compressor 19, the evacuation backpressure valve 22 needs to be adjusted again so that the air intake pressure and the air intake flow rate can meet the target requirements at the same time.
After the control parameter of the ambient air passage side is determined, the compressed hydrogen passage is calibrated.
The rotation speed of the hydrogen circulation pump 14 is determined based on the hydrogen circulation amount of the dynamic condition of the fuel cell system.
Then, the actual pressure of the first branch in the compressed hydrogen gas passage is controlled by adjusting the opening degree of the hydrogen bypass pressure-regulating valve 12, and at the same time, a periodic opening frequency is set to the hydrogen discharge solenoid valve 15.
The pressure of a hydrogen cavity in the fuel cell stack is required to be kept stable at the current working condition point in the whole calibration process, and meanwhile, the internal humidity of the fuel cell stack is ensured to meet the requirement and to be close to the actual working condition data of the fuel cell system state.
Optionally, including but not limited to real-time measurement of the gas composition exiting the hydrogen discharge solenoid valve by a mass spectrometer or hydrogen concentration sensor.
The operation is completed, namely the calibration of the ambient air circuit and the compressed hydrogen circuit of one working condition point is realized, and all control parameters of the current working condition point are recorded. And repeating the operations for each discrete operating point in sequence until the calibration of the dynamic operating point of the whole fuel cell system is completed.
And then, sequentially implementing all calibrated control strategies by a preset time step through an automatic operation program to obtain an initial dynamic working condition test result of the galvanic pile rack.
And comparing the test result with the actual dynamic working condition data of the fuel cell system, and then adjusting the control strategy again and continuously iterating until the fitting requirement is met.
It should be noted that the selection of the operating point may be adjusted according to the dynamic target operating condition, and the calibration point of a certain area may be increased or decreased.
Further, based on the above embodiment of the present invention, referring to fig. 2, fig. 2 is a schematic structural diagram of another fuel cell stack condition testing system provided in the embodiment of the present invention.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a system for testing the operating condition of a fuel cell stack according to another embodiment of the present invention.
The compressed hydrogen passage further includes: a second branch.
The second branch comprises: a hydrogen mass flow controller 23, a hydrogen humidification tank 24, a hydrogen heater 25, and a hydrogen discharge back pressure valve 26.
The compressed hydrogen sequentially passes through the hydrogen inlet electromagnetic valve 11, the hydrogen mass flow controller 23, the hydrogen humidification tank 24, the hydrogen heater 25 and the hydrogen path three-way valve 26 and then enters a hydrogen cavity of the fuel cell stack 16, and the hydrogen discharged from the fuel cell stack 16 is discharged through the hydrogen discharge back pressure valve 26.
The air passage further includes: a compressed air passage.
The compressed air passage includes: an air inlet solenoid valve 27, an air mass flow controller 28, an air humidification tank 29, an air heater 30, and an air passage second three-way valve 31.
The compressed air sequentially passes through the air inlet electromagnetic valve 27, the air mass flow controller 28, the air humidification tank 29, the air heater 30, the air path second three-way valve 31 and the air path first three-way valve 21 and then enters the cavity of the fuel cell stack 16, and the air discharged from the fuel cell stack 16 is discharged through the evacuation back pressure valve 22.
Further, an air inlet of the air humidification tank 29 is connected to the second three-way valve 31 of the air path.
Alternatively, the humidification of the compressed air may be controlled by the air path second three-way valve 31, and the humidification of the compressed hydrogen may be controlled by the hydrogen path three-way valve 13.
Specifically, based on the above test system (a dynamic condition test system using a compressed air and compressed hydrogen passage long discharge mode), the corresponding test method may be: discretizing the dynamic working condition data of the fuel cell system by preset time step, for example, discretizing by 10 ms-1000 ms, and calibrating the ambient air passage and the compressed hydrogen passage of each working condition point.
Firstly, the compressed air path is calibrated.
A target compressed air intake pressure and a target compressed air intake flow rate are set.
The compressed air flow rate is set by the mass air flow controller 28 so that the flow rate of the compressed air reaches the target compressed air intake flow rate. Meanwhile, the back pressure of the whole compressed air path is controlled by the emptying back pressure valve 22, so that the pressure of the compressed air is ensured to reach the target compressed air inlet pressure.
Meanwhile, the temperature and humidity of the compressed air are controlled by the air humidifying tank 24 and the air heater 25 together, and whether the compressed air is heated and humidified or not can be controlled by the air path second three-way valve 31.
And after the calibration of the compressed air circuit is completed, calibrating a second branch of the compressed hydrogen circuit.
A target compressed hydrogen intake pressure and a target compressed hydrogen intake flow rate are set.
The flow rate of the compressed hydrogen is set by the hydrogen mass flow controller 23 so that the flow rate of the compressed hydrogen reaches the target compressed hydrogen intake flow rate. At the same time, the hydrogen chamber pressure is controlled by the hydrogen discharge back pressure valve 26 so that the pressure of the compressed hydrogen gas reaches the target compressed hydrogen gas intake pressure.
Meanwhile, the temperature and humidity of the compressed hydrogen gas are controlled by the hydrogen humidification tank 24 and the hydrogen heater 25.
The operation is completed, namely the calibration of the ambient air circuit and the compressed hydrogen circuit of one working condition point is realized, and all control parameters of the current working condition point are recorded. And repeating the operations for each discrete operating point in sequence until the calibration of the dynamic operating point of the whole fuel cell system is completed.
And then, sequentially implementing all calibrated control strategies by a preset time step through an automatic operation program to obtain an initial dynamic working condition test result of the galvanic pile rack.
And comparing the test result with the actual dynamic working condition data of the fuel cell system, and then adjusting the control strategy again and continuously iterating until the fitting requirement is met.
It should be noted that the selection of the operating point may be adjusted according to the dynamic target operating condition, and the calibration point of a certain area may be increased or decreased.
Further, based on all the above embodiments of the present invention, in another embodiment of the present invention, a method for testing the operating condition of a fuel cell stack is further provided, and referring to fig. 4, fig. 4 is a schematic flow chart of the method for testing the operating condition of a fuel cell stack according to the embodiment of the present invention.
The test method comprises the following steps:
s101: and calibrating the air passage and the compressed hydrogen passage of each working point to obtain an air passage working strategy and a compressed hydrogen passage working strategy.
In this step, the dynamic condition data of the fuel cell system is discretized in a preset time step, for example, in a range of 10ms to 1000ms, and the air passage and the compressed hydrogen passage at each operating point are calibrated.
S102: and sequentially implementing the air passage working strategy and the compressed hydrogen passage working strategy obtained at all working condition points by an automatic operation program according to a preset time step to obtain an initial test result.
S103: and adjusting the working strategy of the air passage and the working strategy of the compressed hydrogen passage according to the initial test result to obtain a target working strategy of the air passage and a target working strategy of the compressed hydrogen passage.
In the embodiment, the simulation test is carried out according to the finally obtained target air passage operating strategy and the target compressed hydrogen passage operating strategy, so that the dynamic operating condition of the electric pile in the fuel cell system can be reproduced to the maximum extent.
Further, based on the above embodiment of the present invention, the calibrating the air passage and the compressed hydrogen passage at each operating point by using the dynamic operating condition testing system based on the air compressor (ambient air passage) and the compressed hydrogen passage circulation and pulse-row mode includes:
setting a target ambient air intake pressure and a target ambient air intake flow rate;
calibrating the working strategies of an air compressor and an evacuation back pressure valve according to the target ambient air inlet pressure and the target ambient air inlet flow rate to obtain an ambient air passage working strategy;
setting a pressure difference between the compressed hydrogen and air;
and calibrating the working strategies of the hydrogen bypass pressure regulating valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve according to the pressure difference to obtain a working strategy of a compressed hydrogen passage.
Further, based on the above embodiment of the present invention, the calibrating the air passage and the compressed hydrogen passage at each operating point based on the dynamic operating condition testing system in the long-row mode of the compressed air passage and the compressed hydrogen passage includes:
setting a target compressed air inlet pressure and a target compressed air inlet flow rate;
controlling an air mass flow controller to bring the flow of compressed air to the target compressed air intake flow rate and controlling an evacuation backpressure valve to bring the pressure of compressed air to the target compressed air intake pressure;
setting a target compressed hydrogen inlet pressure and a target compressed hydrogen inlet flow rate;
and controlling a hydrogen mass flow controller to enable the flow of the compressed hydrogen to reach the target compressed hydrogen inlet flow, and controlling a hydrogen discharge back pressure valve to enable the pressure of the compressed hydrogen to reach the target compressed hydrogen inlet pressure.
It should be noted that the principle of the testing method provided by the embodiment of the present invention is the same as that of the testing system provided by the above embodiment of the present invention, and details are not repeated herein.
The present invention provides a fuel cell stack condition testing system and method, and the specific examples are used to explain the principle and implementation of the present invention, and the above description of the embodiments is only used to help understanding the method and its core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A system for testing the operating conditions of a fuel cell stack, the system comprising: a compressed hydrogen gas passage and an air passage;
the compressed hydrogen passage includes: a first shunt; the first shunt includes: the hydrogen inlet electromagnetic valve, the hydrogen bypass pressure regulating valve, the hydrogen path three-way valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve;
compressed hydrogen enters a hydrogen cavity of the fuel cell stack after sequentially passing through the hydrogen inlet electromagnetic valve, the hydrogen bypass pressure regulating valve and the hydrogen path three-way valve, hydrogen discharged by the fuel cell stack enters the hydrogen cavity of the fuel cell stack again through the hydrogen circulating pump for cyclic utilization, and nitrogen accumulated in the fuel cell stack is discharged through the hydrogen discharge electromagnetic valve;
the air passage includes: an ambient air passageway; the ambient air passage includes: the air filter, the air bypass flow meter, the air compressor, the intercooler, the first three-way valve of the air path and the evacuation back pressure valve;
the ambient air sequentially passes through the air filter, the air bypass flow meter, the air compressor, the intercooler and the first three-way valve of the air path and then enters the cavity of the fuel cell stack, and the air exhausted by the fuel cell stack is exhausted through the evacuation back pressure valve;
the control of the pressure and the flow of the hydrogen entering the fuel cell stack is realized by adjusting the action strategies of the hydrogen bypass pressure regulating valve and the hydrogen exhaust electromagnetic valve, and the control of the pressure and the flow of the ambient air entering the fuel cell stack is realized by adjusting the action strategies of the air compressor and the exhaust back pressure valve.
2. The test system of claim 1, wherein the compressed hydrogen gas pathway further comprises: a second branch circuit;
the second branch comprises: the hydrogen quality flow controller, the hydrogen humidifying tank, the hydrogen heater and the hydrogen exhaust back pressure valve;
compressed hydrogen sequentially enters a hydrogen cavity of the fuel cell stack after passing through the hydrogen inlet electromagnetic valve, the hydrogen mass flow controller, the hydrogen humidifying tank, the hydrogen heater and the hydrogen path three-way valve, and hydrogen discharged by the fuel cell stack is discharged through the hydrogen discharge back pressure valve.
3. The test system of claim 2, wherein the air passage further comprises: a compressed air passage;
the compressed air passage includes: the air inlet electromagnetic valve, the air mass flow controller, the air humidifying tank, the air heater and the air channel second three-way valve;
compressed air sequentially passes through the air inlet electromagnetic valve, the air mass flow controller, the air humidifying tank, the air heater, the air path second three-way valve and the air path first three-way valve and then enters the cavity of the fuel cell stack, and air exhausted by the fuel cell stack is exhausted through the evacuation back pressure valve.
4. The testing system of claim 3, wherein an air inlet of the air humidification tank is connected to the air circuit second three-way valve.
5. The test system of claim 1, wherein the hydrogen bleed solenoid valve is configured to open in a periodic strategy to bleed accumulated nitrogen inside the fuel cell stack.
6. A method for testing the working condition of a fuel cell stack is characterized by comprising the following steps:
calibrating the air passage and the compressed hydrogen passage of each working point to obtain an air passage working strategy and a compressed hydrogen passage working strategy;
sequentially implementing an air passage working strategy and a compressed hydrogen passage working strategy obtained at all working condition points by an automatic operation program according to a preset time step to obtain an initial test result;
and adjusting the working strategy of the air passage and the working strategy of the compressed hydrogen passage according to the initial test result to obtain a target working strategy of the air passage and a target working strategy of the compressed hydrogen passage.
7. The test method of claim 6, wherein the calibrating the air passage and the compressed hydrogen passage for each operating point to obtain an air passage operating strategy and a compressed hydrogen passage operating strategy comprises:
setting a target ambient air intake pressure and a target ambient air intake flow rate;
calibrating the working strategies of an air compressor and an evacuation back pressure valve according to the target ambient air inlet pressure and the target ambient air inlet flow rate to obtain an ambient air passage working strategy;
setting a pressure difference between the compressed hydrogen and air;
and calibrating the working strategies of the hydrogen bypass pressure regulating valve, the hydrogen circulating pump and the hydrogen discharge electromagnetic valve according to the pressure difference to obtain a working strategy of a compressed hydrogen passage.
8. The method of claim 6, wherein the calibrating the air path and the compressed hydrogen path for each operating point comprises:
setting a target compressed air inlet pressure and a target compressed air inlet flow rate;
controlling an air mass flow controller to bring the flow of compressed air to the target compressed air intake flow rate and controlling an evacuation backpressure valve to bring the pressure of compressed air to the target compressed air intake pressure;
setting a target compressed hydrogen inlet pressure and a target compressed hydrogen inlet flow rate;
and controlling a hydrogen mass flow controller to enable the flow of the compressed hydrogen to reach the target compressed hydrogen inlet flow, and controlling a hydrogen discharge back pressure valve to enable the pressure of the compressed hydrogen to reach the target compressed hydrogen inlet pressure.
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| CN202010616238.2A CN111725546B (en) | 2020-06-30 | 2020-06-30 | Test system and test method for fuel cell stack working condition |
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| CN202010616238.2A CN111725546B (en) | 2020-06-30 | 2020-06-30 | Test system and test method for fuel cell stack working condition |
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| CN111725546B CN111725546B (en) | 2021-08-24 |
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| CN112186225A (en) * | 2020-10-19 | 2021-01-05 | 惠州绿保科技有限公司 | Fuel cell stack test board and backpressure control method |
| CN112751061A (en) * | 2020-12-31 | 2021-05-04 | 吉林大学 | Fuel cell air circuit testing system and method |
| CN112993340A (en) * | 2021-02-02 | 2021-06-18 | 武汉众宇动力系统科技有限公司 | Fuel cell stack test system, test bench thereof and backpressure control method |
| CN113285100A (en) * | 2021-05-18 | 2021-08-20 | 中船重工(重庆)西南装备研究院有限公司 | Performance test system for hydrogen circulating pump of hydrogen fuel cell |
| CN114520352A (en) * | 2022-01-10 | 2022-05-20 | 江苏氢导智能装备有限公司 | Gas pressure control device and electric pile test platform |
| CN114719558A (en) * | 2022-04-19 | 2022-07-08 | 江苏凌氢新能源科技有限公司 | Hydrogen cooling and cooling integrated unit and control method |
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| CN112186225A (en) * | 2020-10-19 | 2021-01-05 | 惠州绿保科技有限公司 | Fuel cell stack test board and backpressure control method |
| CN112751061A (en) * | 2020-12-31 | 2021-05-04 | 吉林大学 | Fuel cell air circuit testing system and method |
| CN112993340A (en) * | 2021-02-02 | 2021-06-18 | 武汉众宇动力系统科技有限公司 | Fuel cell stack test system, test bench thereof and backpressure control method |
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| CN114520352A (en) * | 2022-01-10 | 2022-05-20 | 江苏氢导智能装备有限公司 | Gas pressure control device and electric pile test platform |
| CN114520352B (en) * | 2022-01-10 | 2024-02-23 | 江苏氢导智能装备有限公司 | Gas pressure control device and electric pile test platform |
| CN114719558A (en) * | 2022-04-19 | 2022-07-08 | 江苏凌氢新能源科技有限公司 | Hydrogen cooling and cooling integrated unit and control method |
| CN114864996A (en) * | 2022-05-25 | 2022-08-05 | 中国第一汽车股份有限公司 | Air supply system of fuel cell and control method |
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