CN115172824A - Fuel cell test bench - Google Patents
Fuel cell test bench Download PDFInfo
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- CN115172824A CN115172824A CN202210697946.2A CN202210697946A CN115172824A CN 115172824 A CN115172824 A CN 115172824A CN 202210697946 A CN202210697946 A CN 202210697946A CN 115172824 A CN115172824 A CN 115172824A
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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
- H01M8/04791—Concentration; Density
- H01M8/04798—Concentration; Density of fuel cell reactants
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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
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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
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
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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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
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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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- 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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Abstract
The invention provides a fuel cell test bed which comprises an air supply module, a hydrogen supply module and an integrated control module. The air supply module is used for communicating with the cathode of the fuel cell, the air supply module is provided with a first circulation loop which enables the reaction gas on the outlet side of the cathode of the fuel cell to flow back to the cathode of the fuel cell, and the first circulation loop is communicated with a first flow control valve. And the hydrogen supply module is used for being communicated with the anode of the fuel cell, and is provided with a second circulation loop which enables the reaction gas on the outlet side of the anode of the fuel cell to flow back to the anode of the fuel cell, and a second flow control valve is communicated with the second circulation loop. According to the invention, by arranging the first circulation loop, the closed-loop control of the oxygen concentration is realized, the oxygen concentration in the fuel cell is flexibly adjusted, and the service life attenuation of the fuel cell caused by high voltage during idling and small load of the fuel cell is avoided.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell test bed.
Background
The performance test and characterization of the fuel cell are indispensable links in the development of the fuel cell, and common basic tests comprise a polarization curve test, a dynamic working condition test and the like.
The current fuel cell testing device is usually large in total oxygen amount or equivalence ratio due to the fact that oxygen concentration in the fuel cell cannot be adjusted when the fuel cell is in idling or under small load, and then the fuel cell voltage is high, and the high working voltage is extremely unfavorable for the service life of the fuel cell.
Disclosure of Invention
The invention mainly aims to provide a fuel cell test bed to solve the problem that the oxygen concentration in a fuel cell cannot be adjusted in the process of idling or small-load testing in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fuel cell test stand including: the air supply module is used for being communicated with the cathode of the fuel cell and is provided with a first circulation loop which enables the reaction gas on the outlet side of the cathode of the fuel cell to flow back to the cathode of the fuel cell, and a first flow control valve is communicated with the first circulation loop; the hydrogen supply module is used for being communicated with the anode of the fuel cell and is provided with a second circulation loop which enables the reaction gas on the outlet side of the anode of the fuel cell to flow back to the anode of the fuel cell, and a second flow control valve is communicated with the second circulation loop; and the integrated control module is respectively in signal communication with the air supply module and the hydrogen supply module and is used for controlling the air supply module to supply air for the fuel cell and controlling the hydrogen supply module to supply hydrogen for the fuel cell.
Further, the air supply module further includes: the fuel cell system comprises a first air inlet branch, a second air inlet branch, a third air inlet branch and a fourth air inlet branch, wherein the first air inlet branch is used for being communicated with a cathode inlet of a fuel cell, an air inlet stop valve, an air flow sensor, an air compressor, a third flow control valve, an intercooler and a humidifier are arranged on the first air inlet branch, and a first temperature sensor and a first pressure sensor are arranged on the exhaust side of the first air inlet branch; the first exhaust branch is used for being communicated with a cathode outlet of the fuel cell, a first water separator and a first back pressure control valve are arranged on the first exhaust branch, and a second temperature sensor and a second pressure sensor are arranged on the air inlet side of the first exhaust branch; the air inlet end of the first circulation loop is communicated with the first exhaust branch, and the exhaust end of the first circulation loop is communicated with the first air inlet branch.
Furthermore, a first bypass branch is arranged on the first air inlet branch, one end of the first bypass branch is communicated with a pipeline on the air inlet side of the intercooler, and the other end of the first bypass branch is communicated with a pipeline on the air exhaust side of the intercooler.
Furthermore, a second bypass branch is arranged on the first air inlet branch, one end of the second bypass branch is communicated with a pipeline on the air inlet side of the humidifier, and the other end of the second bypass branch is communicated with a pipeline on the air outlet side of the humidifier.
Further, the exhaust side of the air compressor is communicated with a pressure stabilizing device.
Further, the hydrogen supply module further includes: the second air inlet branch is communicated with an anode inlet of the fuel cell, a hydrogen cylinder, a fourth flow control valve, a pressure reducing device and a hydrogen flow sensor are arranged on the second air inlet branch, and a third temperature sensor and a third pressure sensor are arranged on the exhaust side of the second air inlet branch; the second exhaust branch is communicated with an anode outlet of the fuel cell, a second water separator and a second back pressure control valve are arranged on the second exhaust branch, and a fourth temperature sensor and a fourth pressure sensor are arranged on the air inlet side of the second exhaust branch; the air inlet end of the second circulation loop is communicated with the second exhaust branch, and the air outlet end of the second circulation loop is communicated with the second air inlet branch.
Further, still include: and the cooling loop is used for being communicated with the fuel cell and used for cooling the fuel cell.
Further, still include: and the single-chip voltage inspection device is integrated in the fuel cell and is in signal connection with the integrated control module.
Further, still include: and the electrochemical impedance module is used for being integrated in the fuel cell and is in signal connection with the integrated control module.
Further, the method also comprises the following steps: and the electronic load module is electrically connected with the fuel cell and is in signal connection with the integrated control module.
By applying the technical scheme of the invention, the oxygen content in the air is a fixed value, the oxygen content in the first circulation loop is lower than the oxygen content in the air, and the air is mixed with the gas in the first circulation loop, so that the closed-loop control of the oxygen concentration is realized, and the oxygen concentration in the fuel cell is flexibly adjusted. In the process of idling and small-load operation of the fuel cell, air entering the fuel cell is mixed with gas in the first circulation loop, so that the oxygen concentration in the fuel cell is reduced, the output voltage and power of the fuel cell are ensured to be at a lower level, and the service life attenuation of the fuel cell caused by high voltage during idling and small load is avoided. In the process of idle speed and small load operation of the fuel cell, the gas in the first circulation loop operates in a circulating mode, and liquid water generated by long-time operation can be removed, so that the phenomenon of flooding of the fuel cell caused by long-time small load operation is avoided. The fuel cell is shut down, the air supply is closed, the first circulation loop keeps running, gas exhausted from the cathode of the fuel cell enters the cathode of the fuel cell through the first circulation loop for multiple times, oxygen is gradually reacted, and the oxygen content is gradually reduced to zero, so that the fuel cell can be shut down naturally to ensure the durability and the service life of the fuel cell. The second circulation loop is arranged, so that the hydrogen utilization rate is improved, the distribution uniformity of the hydrogen concentration in the anode is improved, and the lack of local hydrogen is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a system schematic of a fuel cell test rig according to the present invention;
fig. 2 shows a system block diagram of a fuel cell test stand in the present invention.
Wherein the figures include the following reference numerals:
100. a fuel cell; 200. a first circulation loop; 201. a first flow control valve; 202. an air circulation pump; 300. a second circulation loop; 301. a second flow control valve; 302. a hydrogen circulation pump; 400. a first air intake branch; 401. an air compressor; 402. a third flow rate control valve; 403. an intercooler; 404. a humidifier; 405. a first temperature sensor; 406. a first pressure sensor; 407. an air flow sensor; 408. an intake stop valve; 409. a voltage stabilizer; 410. a first filter; 411. a first bypass branch; 412. a second bypass branch; 500. a first exhaust branch; 501. a first water separator; 502. a first backpressure control valve; 503. a second temperature sensor; 504. a second pressure sensor; 505. an oxygen concentration sensor; 600. a second air intake branch; 601. a hydrogen gas cylinder; 602. a first-stage pressure reducer; 603. a second stage pressure reducer; 604. a second filter; 605. a fourth flow control valve; 606. a hydrogen flow rate sensor; 607. a third temperature sensor; 608. a third pressure sensor; 700. a second exhaust branch; 701. a fourth temperature sensor; 702. a fourth pressure sensor; 703. a purge valve; 704. a drain valve; 705. a second backpressure control valve; 706. a second water separator; 800. a cooling circuit; 801. a water pump; 802. a water tank; 803. a heat sink.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, and in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same reference numerals are used to designate the same devices, and thus the description thereof will be omitted.
Referring to fig. 1-2, a fuel cell 100 test rig is provided according to an embodiment of the present application.
Specifically, the fuel cell 100 test stand includes an air supply module, a hydrogen supply module, and an integrated control module. The air supply module is used for communicating with the cathode of the fuel cell 100, the air supply module is provided with a first circulation loop 200 which enables the reaction gas on the outlet side of the cathode of the fuel cell 100 to flow back to the cathode of the fuel cell 100, and a first flow control valve 201 is communicated with the first circulation loop 200. And a hydrogen supply module for communicating with the anode of the fuel cell 100, the hydrogen supply module having a second circulation circuit 300 for returning the reactant gas on the anode outlet side of the fuel cell 100 to the anode of the fuel cell 100, the second circulation circuit 300 being communicated with a second flow control valve 301. And the integrated control module is respectively in signal communication with the air supply module and the hydrogen supply module, and is used for controlling the air supply module to supply air to the fuel cell 100 and controlling the hydrogen supply module to supply hydrogen to the fuel cell 100.
In the embodiment of the present application, the oxygen content in the air is a fixed value, the oxygen content in the first circulation loop 200 is lower than the oxygen content in the air, and the air is mixed with the gas in the first circulation loop 200 to realize closed-loop control of the oxygen concentration, flexibly adjust the oxygen concentration in the fuel cell 100, and flexibly adjust the oxygen concentration between 0% and 20%. During the idle speed and the small load operation of the fuel cell 100, the air entering the fuel cell 100 is mixed with the gas in the first circulation loop 200, so as to reduce the oxygen concentration inside the fuel cell 100, ensure that the output voltage and the power of the fuel cell 100 are both at a lower level, and avoid the service life attenuation of the fuel cell 100 caused by the high voltage during the idle speed and the small load. During the idling and low-load operation of the fuel cell 100, the gas in the first circulation loop 200 circulates and operates, so that liquid water generated by long-time operation can be removed, and the phenomenon of flooding caused by long-term low-load operation of the fuel cell 100 is avoided. During the shutdown of the fuel cell 100, the air supply is turned off, the first circulation loop 200 is kept running, the gas discharged from the cathode of the fuel cell 100 enters the cathode of the fuel cell 100 through the first circulation loop 200 for a plurality of times, the oxygen is gradually reacted, and the oxygen content is gradually reduced to zero, so that the fuel cell 100 can be naturally shut down to ensure the durability and the service life of the fuel cell 100. The second circulation loop 300 improves the utilization rate of hydrogen, improves the distribution uniformity of hydrogen concentration inside the anode, and avoids the lack of local hydrogen.
As shown in fig. 1, the air supply module further includes a first intake branch 400 and a first exhaust branch 500. The first intake branch 400 is configured to communicate with a cathode inlet of the fuel cell 100, the first intake branch 400 is provided with an intake shutoff valve 408, an air flow sensor 407, an air compressor 401, a third flow control valve 402, an intercooler 403, and a humidifier 404, and an exhaust side of the first intake branch 400 is provided with a first temperature sensor 405 and a first pressure sensor 406. The first exhaust branch 500 is used for communicating with the cathode outlet of the fuel cell 100, the first exhaust branch 500 is provided with a first water separator 501 and a first back pressure control valve 502, and the inlet side of the first exhaust branch 500 is provided with a second temperature sensor 503 and a second pressure sensor 504. The intake end of the first circulation circuit 200 communicates with the first exhaust branch 500, and the exhaust end of the first circulation circuit 200 communicates with the first intake branch 400. Wherein, an air circulation pump 202 is further provided on the first circulation loop 200.
The first temperature sensor 405 monitors the temperature of the cathode inlet of the fuel cell 100 in real time, the second temperature sensor 503 monitors the temperature of the cathode outlet of the fuel cell 100 in real time, the first pressure sensor 406 monitors the pressure of the cathode inlet of the fuel cell 100 in real time, and the second pressure sensor 504 monitors the pressure of the cathode inlet of the fuel cell 100 in real time, preventing the intake air temperature and pressure from exceeding the limit values. The opening degree of the first backpressure control valve 502 at the cathode outlet of the fuel cell 100 is adjusted according to the measured pressure at the cathode inlet of the fuel cell 100 and the target demand pressure, so as to control the cathode inlet pressure of the fuel cell 100.
Meanwhile, the gas exhausted from the cathode of the fuel cell 100 carries part of the water, and the first circulation loop 200 may achieve internal self-humidification using the water in the exhaust gas.
Optionally, an oxygen concentration sensor 505 is disposed on the first exhaust branch 500, and the oxygen content of the gas in the first circulation loop 200 is monitored by the oxygen concentration sensor 505.
Preferably, a first filter 410 is disposed on the first air inlet branch 400 to filter the redundant physical and chemical impurities in the air.
Further, a first bypass branch 411 is provided on the first intake branch 400, one end of the first bypass branch 411 is communicated with a pipeline on the intake side of the intercooler 403, and the other end of the first bypass branch 411 is communicated with a pipeline on the exhaust side of the intercooler 403. Specifically, the first bypass branch 411 is connected to the first intake branch 400 by a three-way valve. By adjusting the opening of the three-way valve, the flow rate of the gas flowing through the intercooler 403 is flexibly distributed, that is, the ratio of the air at different temperatures is adjusted, and the temperature of the air entering the fuel cell 100 is flexibly controlled.
Further, a second bypass branch 412 is provided on the first intake branch 400, one end of the second bypass branch 412 is communicated with a pipe on the intake side of the humidifier 404, and the other end of the second bypass branch 412 is communicated with a pipe on the exhaust side of the humidifier 404. Specifically, the second bypass branch 412 is connected to the first intake branch 400 by a three-way valve. By adjusting the opening of the three-way valve, the flow rate of the gas flowing through the humidifier 404 is flexibly distributed, that is, the ratio of the air with different humidity is adjusted, and the humidity of the air entering the fuel cell 100 is flexibly controlled.
In order to solve the problem that air flow control is inaccurate due to large air supply pressure fluctuation in the experimental process, system spectrum analysis is carried out on the actually measured pressure fluctuation, and a pressure stabilizing device 409 is communicated with the exhaust side of the air compressor 401. Wherein, the pressure stabilizing device 409 is a pressure stabilizing tank.
As shown in fig. 1, the hydrogen supply module further includes a second intake branch 600 and a second exhaust branch 700. The second intake branch 600 is communicated with the anode inlet of the fuel cell 100, the second intake branch 600 is provided with a hydrogen cylinder 601, a fourth flow control valve 605, a pressure reducing device, and a hydrogen flow sensor 606, and the exhaust side of the second intake branch 600 is provided with a third temperature sensor 607 and a third pressure sensor 608. The second exhaust branch 700 is communicated with the anode outlet of the fuel cell 100, a second water separator 706 and a second back pressure control valve 705 are provided on the second exhaust branch 700, and a fourth temperature sensor 701 and a fourth pressure sensor 702 are provided on the intake side of the second exhaust branch 700. The air inlet end of the second circulation circuit 300 is communicated with the second exhaust branch 700, and the air outlet end of the second circulation circuit 300 is communicated with the second air inlet branch 600. Preferably, the pressure reduction device is a first-stage pressure reducer 602 and a second-stage pressure reducer 603 which are connected in series in sequence. Wherein, the second circulation loop 300 is also provided with a hydrogen circulation pump 302.
The third temperature sensor 607 monitors the temperature of the anode inlet of the fuel cell 100 in real time, the fourth temperature sensor 701 monitors the temperature of the anode outlet of the fuel cell 100 in real time, the third pressure sensor 608 monitors the pressure of the anode inlet of the fuel cell 100 in real time, and the fourth pressure sensor 702 monitors the pressure of the anode inlet of the fuel cell 100 in real time, preventing the temperature and the pressure of the intake air from exceeding the limit values. The opening of the second backpressure control valve 705 at the anode outlet of the fuel cell 100 is adjusted according to the measured pressure at the anode inlet of the fuel cell 100 and the target demand pressure, so as to control the anode inlet pressure of the fuel cell 100.
Preferably, a second filter 604 is disposed on the second gas inlet branch 600 to filter the redundant physical and chemical impurities in the hydrogen gas.
Further, a second water separator 706 is in communication with a drain branch, on which a drain valve 704 is disposed.
Furthermore, a purge valve 703 is provided in the second inlet branch 600, so that after the fuel cell 100 is stopped, nitrogen gas may be introduced into the fuel cell 100 to purge the reaction gas and the water vapor in the fuel cell 100.
To investigate the fuel cell 100 engine cold start problem, a cooling circuit 800 is provided. The cooling circuit 800 is used to communicate with the fuel cell 100, and the cooling circuit 800 is used to cool the fuel cell 100. The cooling circuit 800 is provided with a water pump 801, a water tank 802 and a radiator 803, the temperature of the cooling liquid is adjusted according to different power requirements of the fuel cell 100, and the rotating speed of the water pump 801 can be adjusted in real time according to the actually measured flow rate of the cooling circuit 800 and the target required flow rate.
As shown in fig. 2, the fuel cell 100 test bed is further provided with a single-chip voltage inspection device, an electrochemical impedance module and an electronic load module, the single-chip voltage inspection device and the electrochemical impedance module are all integrated in the fuel cell 100, the electronic load module is electrically connected with the fuel cell 100, and the single-chip voltage inspection device, the electrochemical impedance module and the electronic load module are all in signal connection with the integrated control module.
The electronic load module is used to measure the ac impedance within the stack of fuel cells 100 for conducting research in water management of the fuel cells 100. The electrochemical impedance module can generate alternating current excitation current, superpose the alternating current excitation current and load current, apply the alternating current excitation current and the load current to the fuel cell 100 together, and utilize signal processing methods such as fast Fourier change or wavelet change and the like according to the acquired high-frequency current and voltage data to realize impedance calculation under different frequencies, so that the electrochemical impedance module can be used for diagnosing dry and water flooding phenomena of the fuel cell 100. The voltage of the fuel cell 100 is monitored by the single-chip voltage inspection device, and the voltage monitoring precision is improved.
Specifically, the integrated control module comprises a rack control unit, a data acquisition unit, an analysis unit, an alarm unit and a wireless communication unit, and can realize real-time accurate measurement of a plurality of parameters in the test process of the vehicle fuel cell 100. The integrated control module effectively integrates a test monitoring interface, system control, state monitoring, data acquisition and data storage into a whole based on a Labview software platform and a CAN bus network communication technology. The real-time communication of each sensor, each actuator and each monitoring software is realized by applying the vehicle CAN bus technology, and the communication speed is 250kbps/500kbps.
The rack control unit mainly used controls each executor on the test rack, includes: on-off of each electromagnetic valve on the bench, communication of a flow control valve, opening adjustment of a back pressure valve, flow and pressure control of a water pump 801, rotation speed control of a hydrogen circulation pump 302 and an air circulation pump 202, dry and wet air bypass control, load mode control, and the like. The inlet pressure, flow, temperature and load current of the fuel cell 100 are set in advance according to the operating conditions of different working conditions and are controlled by automatic programming so as to meet the test of different working conditions for vehicles.
The data acquisition unit is mainly used for acquiring signals such as pressure, temperature, humidity and the like in an air supply system, a humidification system, a cooling system, an electrical system and the like, and high-frequency voltage and current data, and is used for quickly calculating impedance and realizing automatic acquisition and storage of the data.
The analysis unit is used for analyzing the data of gathering, possesses visual function, and sensor data alternative shows, can draw the impedance spectrogram of calculation in real time, shows impedance value, phase angle isoparametric under the different key frequency, convenient real-time analysis.
The alarm unit is used for monitoring safety problems in the test process of the rack in real time, monitoring and alarming on the hydrogen concentration overrun online, monitoring and alarming on the intake temperature, pressure, flow and cooling water flow overrun online, monitoring and alarming on the voltage, current and temperature of the fuel cell 100 online, and protecting system hardware in an emergency stop mode.
The wireless communication unit is mainly used for communicating with a wireless terminal to ensure real-time communication of each node, and by applying the vehicle CAN bus communication technology, the embedded controller is integrated, so that networking communication and data fusion are realized, flexible control of experimenters to the system in the experimental process is ensured, and a convenient and reliable operation platform is provided. Meanwhile, key data of the test bench can be transmitted to the wireless terminal, remote data monitoring is achieved, required parameters are sent to the test bench through the wireless terminal device, and remote experiments are achieved.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fuel cell test rig, comprising:
an air supply module for communicating with the cathode of the fuel cell (100), the air supply module having a first circulation circuit (200) for returning the reactant gas on the cathode outlet side of the fuel cell (100) to the cathode of the fuel cell (100), the first circulation circuit (200) being communicated with a first flow control valve (201);
a hydrogen supply module which is used for communicating with the anode of the fuel cell (100), the hydrogen supply module is provided with a second circulation loop (300) which enables the reaction gas on the outlet side of the anode of the fuel cell (100) to flow back to the anode of the fuel cell (100), and a second flow control valve (301) is communicated with the second circulation loop (300);
the integrated control module is respectively in signal communication with the air supply module and the hydrogen supply module and is used for controlling the air supply module to supply air for the fuel cell (100) and controlling the hydrogen supply module to supply hydrogen for the fuel cell (100).
2. The fuel cell test rig of claim 1, wherein the air supply module further comprises:
the fuel cell system comprises a first air inlet branch (400), wherein the first air inlet branch (400) is used for being communicated with a cathode inlet of a fuel cell (100), an air inlet stop valve (408), an air flow sensor (407), an air compressor (401), a third flow control valve (402), an intercooler (403) and a humidifier (404) are arranged on the first air inlet branch (400), and a first temperature sensor (405) and a first pressure sensor (406) are arranged on an exhaust side of the first air inlet branch (400);
the fuel cell system comprises a first exhaust branch (500), the first exhaust branch (500) is used for being communicated with a cathode outlet of a fuel cell (100), a first water divider (501) and a first back pressure control valve (502) are arranged on the first exhaust branch (500), and a second temperature sensor (503) and a second pressure sensor (504) are arranged on an air inlet side of the first exhaust branch (500);
the air inlet end of the first circulation loop (200) is communicated with the first exhaust branch (500), and the air outlet end of the first circulation loop (200) is communicated with the first air inlet branch (400).
3. The fuel cell test bed according to claim 2, wherein a first bypass branch (411) is provided on the first intake branch (400), one end of the first bypass branch (411) communicates with a pipe on an intake side of the intercooler (403), and the other end of the first bypass branch (411) communicates with a pipe on an exhaust side of the intercooler (403).
4. The fuel cell test bed according to claim 2, wherein a second bypass branch (412) is provided on the first air inlet branch (400), one end of the second bypass branch (412) communicates with a pipe line on an air inlet side of the humidifier (404), and the other end of the second bypass branch (412) communicates with a pipe line on an air outlet side of the humidifier (404).
5. The fuel cell test bench according to claim 2, wherein the exhaust side of the air compressor (401) is communicated with a pressure stabilizer (409).
6. The fuel cell test rig according to claim 1, wherein the hydrogen supply module further comprises:
the fuel cell system comprises a second air inlet branch (600), the second air inlet branch (600) is communicated with an anode inlet of the fuel cell (100), a hydrogen cylinder (601), a fourth flow control valve (605), a pressure reducing device and a hydrogen flow sensor (606) are arranged on the second air inlet branch (600), and a third temperature sensor (607) and a third pressure sensor (608) are arranged on an exhaust side of the second air inlet branch (600);
a second exhaust branch (700), wherein the second exhaust branch (700) is communicated with an anode outlet of the fuel cell (100), a second water separator (706) and a second back pressure control valve (705) are arranged on the second exhaust branch (700), and a fourth temperature sensor (701) and a fourth pressure sensor (702) are arranged on an air inlet side of the second exhaust branch (700);
the air inlet end of the second circulation loop (300) is communicated with the second exhaust branch (700), and the air outlet end of the second circulation loop (300) is communicated with the second air inlet branch (600).
7. The fuel cell test rig according to claim 1, further comprising:
a cooling circuit (800), the cooling circuit (800) being configured to communicate with a fuel cell (100), the cooling circuit (800) being configured to cool the fuel cell (100).
8. The fuel cell test rig according to claim 1, further comprising:
the single-chip voltage inspection device is integrated in the fuel cell (100) and is in signal connection with the integrated control module.
9. The fuel cell test rig according to claim 1, further comprising:
an electrochemical impedance module for integration within a fuel cell (100), the electrochemical impedance module in signal connection with the integrated control module.
10. The fuel cell test rig according to claim 1, further comprising:
an electronic load module for electrical connection with a fuel cell (100), the electronic load module in signal connection with the integrated control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697946.2A CN115172824A (en) | 2022-06-20 | 2022-06-20 | Fuel cell test bench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210697946.2A CN115172824A (en) | 2022-06-20 | 2022-06-20 | Fuel cell test bench |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116779912A (en) * | 2023-06-15 | 2023-09-19 | 大连锐格新能源科技有限公司 | Modularized structure for fuel cell test bench and replacement and test method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116779912A (en) * | 2023-06-15 | 2023-09-19 | 大连锐格新能源科技有限公司 | Modularized structure for fuel cell test bench and replacement and test method thereof |
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