CN110661016A - Flow resistance testing device and flow resistance testing method of fuel cell - Google Patents
Flow resistance testing device and flow resistance testing method of fuel cell Download PDFInfo
- Publication number
- CN110661016A CN110661016A CN201910829507.0A CN201910829507A CN110661016A CN 110661016 A CN110661016 A CN 110661016A CN 201910829507 A CN201910829507 A CN 201910829507A CN 110661016 A CN110661016 A CN 110661016A
- Authority
- CN
- China
- Prior art keywords
- pressure
- medium
- fuel cell
- flow
- flow resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 151
- 238000012360 testing method Methods 0.000 title claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 111
- 239000007924 injection Substances 0.000 claims abstract description 111
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims 4
- 239000003570 air Substances 0.000 description 21
- 239000001257 hydrogen Substances 0.000 description 19
- 229910052739 hydrogen Inorganic materials 0.000 description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 18
- 239000000498 cooling water Substances 0.000 description 16
- 238000010248 power generation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal 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
Images
Classifications
-
- 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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04417—Pressure; Ambient pressure; Flow of the coolant
-
- 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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a flow resistance testing device and a flow resistance testing method of a fuel cell, and relates to the field of fuel cells. The medium is injected into the medium injection port of the fuel cell, the pressure of the medium injection port is increased from the first pressure to the second pressure, the resistance to the medium in the fuel cell can be obtained according to the difference of the two pressures by detecting the pressure of the medium injection port and the pressure of the medium outflow port of the fuel cell, and meanwhile, the resistance to the medium in the fuel cell can be obtained by detecting the flow of the medium injection port under the condition of different flows, so that the flow resistance of the fuel cell when the medium is injected at any flow and pressure is tested, and the normal work of the fuel cell is ensured.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to a flow resistance testing device and a flow resistance testing method of a fuel cell.
Background
The fuel cell is a chemical device which directly converts chemical energy of fuel into electric energy, belongs to electrochemical power generation, and is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation.
The fuel cell is provided with a hydrogen injection port, a hydrogen flow outlet, an air injection port, an air flow outlet, a cooling water injection port and a cooling water flow outlet, when the fuel cell works, hydrogen and air are respectively introduced into the hydrogen injection port and the air injection port, oxygen in the hydrogen and the air reacts in the fuel cell to generate electric energy, and unreacted hydrogen and air are discharged. Water for cooling is injected into the cooling water injection port and discharged from the cooling water outlet port. The medium (hydrogen, air or water) will be subjected to a certain resistance when flowing in the fuel cell, the resistance to the medium inside the fuel cell will affect the working state of the fuel cell, and the normal operation of the fuel cell will be affected by too much or too little resistance.
Disclosure of Invention
The embodiment of the invention provides a flow resistance testing device and a flow resistance testing method of a fuel cell, which can test the flow resistance in the fuel cell. The technical scheme is as follows:
in one aspect, an embodiment of the present invention provides a flow resistance testing apparatus for a fuel cell, where the flow resistance testing apparatus includes:
a medium injection pipe for connecting with the medium injection port of the fuel cell;
a first pressure sensor for detecting a pressure of the medium injection port, provided on the medium injection pipe;
a first flow sensor for detecting a flow rate of the medium injection port, provided on the medium injection pipe;
a regulating valve for regulating the pressure of the medium injection port, which is provided on the medium injection pipe;
the regulating valve controller is used for increasing the pressure of the medium injection port from a first pressure to a second pressure, the regulating valve controller is connected with the regulating valve, the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell works;
a medium flow outlet pipe having one end for connection with a medium flow outlet of the fuel cell;
a second pressure sensor for detecting the pressure of the medium outflow opening is arranged on the medium outflow pipe.
Optionally, the flow resistance testing device further comprises a first gate valve for controlling on-off of the medium outflow pipe, and the first gate valve is arranged on the medium outflow pipe.
Optionally, the flow resistance testing device further includes a second gate valve for controlling on/off of the medium injection pipe, the second gate valve is disposed on the medium injection pipe, and the first pressure sensor is located at an outlet end of the second gate valve, or the second pressure sensor is located at an inlet end of the first gate valve.
Optionally, the flow resistance test device further comprises a second flow sensor for detecting a flow rate of the medium outflow port, the second flow sensor being provided on the medium outflow pipe.
Optionally, the flow resistance testing device further comprises an alarm configured to issue an alarm when a deviation of the pressure of the medium outflow port from a reference pressure, which is a reference value of the pressure of the medium outflow port corresponding to a current pressure of the medium injection port at a current medium injection flow rate, exceeds a predetermined range.
Optionally, the alarm includes any one of an audible alarm, a light alarm and an audible and visual alarm.
On the other hand, the embodiment of the invention also provides a flow resistance testing method of the fuel cell, which comprises the following steps:
injecting a medium into a medium injection port of the fuel cell;
increasing the pressure of the medium injection port to enable the pressure of the medium injection port to be increased from a first pressure to a second pressure, wherein the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell works;
the flow rate and pressure of the medium inlet and the pressure of the medium outlet of the fuel cell are detected.
Optionally, prior to said increasing the pressure of said medium injection port, said method further comprises:
maintaining the pressure of the fuel cell;
and judging whether the fuel cell has leakage or not according to the pressure change of the medium injection port or the medium outflow port within a preset time.
Optionally, the flow resistance testing method further comprises:
an alarm is issued when the deviation of the pressure at the medium outlet from a reference pressure, which is a reference value of the pressure at the medium outlet corresponding to the current pressure at the medium inlet at the current medium injection flow rate, exceeds a predetermined range.
Optionally, the alarm comprises any one of an audible alarm, a light alarm and an audible and visual alarm.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least: the pressure of the medium injection opening is increased from a first pressure to a second pressure by injecting the medium into the medium injection opening of the fuel cell and increasing the pressure of the medium injection opening, the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, the second pressure is the upper limit pressure of the medium introduced when the fuel cell works, the pressure range of the medium inlet of the fuel cell can be simulated when the fuel cell actually works, and by detecting the pressure of the medium inlet and the pressure of the medium outlet of the fuel cell, the resistance to the medium in the fuel cell can be obtained according to the difference value of the two pressures, and the resistance to the medium in the fuel cell can be obtained under the condition of different flow rates by detecting the flow rate of the medium injection port, therefore, the flow resistance of the fuel cell when the medium is injected at any flow and pressure is tested, and the normal operation of the fuel cell is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flow resistance testing device of a fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another fuel cell flow resistance testing device provided by an embodiment of the invention;
FIG. 3 is a flow chart of a flow resistance testing method for a fuel cell according to an embodiment of the present invention;
fig. 4 is a flow chart of another fuel cell flow resistance testing method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a flow resistance testing device of a fuel cell according to an embodiment of the present invention. As shown in fig. 1, the flow resistance testing device of the fuel cell includes a medium injection pipe 10, a first pressure sensor 11, a first flow sensor 12, a regulating valve 13, a regulating valve controller 14, a medium outflow pipe 20, and a second pressure sensor 21.
The medium inlet pipe 10 is connected to a medium inlet of the fuel cell 1.
The first pressure sensor 11 is used to detect the pressure of the medium injection port, and the first pressure sensor 11 is provided on the medium injection pipe 10.
The first flow sensor 12 detects the flow rate of the medium inlet, and the first flow sensor 12 is provided in the medium inlet pipe 10.
The regulating valve 13 is used to regulate the pressure of the medium injection port, and the regulating valve 13 is provided on the medium injection pipe 10.
The control valve 14 is used to increase the pressure of the medium inlet from a first pressure to a second pressure, the control valve 14 being connected to the control valve 13. The first pressure is the lower limit pressure of the medium introduced when the fuel cell 1 works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell 1 works. The first pressure may be different and the second pressure may be different for different fuel cells 1. Illustratively, the first pressure may be 1atm and the second pressure may be 3 atm.
One end of the medium outflow pipe 20 is used for connection to a medium outflow port of the fuel cell 1.
The second pressure sensor 21 is used to detect the pressure at the medium outflow opening, and the second pressure sensor 21 is arranged at the medium outflow opening 20.
The pressure of the medium injection opening is increased from a first pressure to a second pressure by injecting the medium into the medium injection opening of the fuel cell and increasing the pressure of the medium injection opening, the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, the second pressure is the upper limit pressure of the medium introduced when the fuel cell works, the pressure range of the medium inlet of the fuel cell can be simulated when the fuel cell actually works, and by detecting the pressure of the medium inlet and the pressure of the medium outlet of the fuel cell, the resistance to the medium in the fuel cell can be obtained according to the difference value of the two pressures, and the resistance to the medium in the fuel cell can be obtained under the condition of different flow rates by detecting the flow rate of the medium injection port, therefore, the flow resistance of the fuel cell when the medium is injected at any flow and pressure is tested, and the normal operation of the fuel cell is ensured.
The medium injection port of the fuel cell 1 may include a hydrogen injection port 1a, an air injection port 1c, a cooling water injection port 1e, and the medium outflow port may include a hydrogen outflow port 1b, an air outflow port 1d, and a cooling water outflow port 1f, and the medium outflow pipe 20 communicates with the hydrogen outflow port 1b if the medium injection pipe 10 communicates with the hydrogen injection port 1a when the flow resistance test is performed on the fuel cell 1; if the medium injection pipe 10 is communicated with the air injection port 1c, the medium outflow pipe 20 is communicated with the air outflow port 1 d; if the medium injection pipe 10 is communicated with the cooling water injection port 1e, the medium outflow pipe 20 is communicated with the cooling water flow outlet 1 f. By the respective tests, the flow resistance between the hydrogen gas injection port 1a and the hydrogen gas flow outlet 1b, the flow resistance between the air injection port 1c and the air flow outlet 1d, and the flow resistance between the cooling water injection port 1e and the cooling water flow outlet 1f in the fuel cell 1 can be obtained. In testing the hydrogen injection port 1a and the air injection port 1c, the medium used may be a gaseous medium, such as hydrogen, nitrogen, air, or helium. In testing the cooling water inlet 1e, the medium used may be a liquid medium such as water, although a gaseous medium may also be used.
Alternatively, regulator valve Controller 14 may be a PLC (Programmable Logic Controller).
In the process of increasing the pressure of the medium injection port from the first pressure to the second pressure, the pressure may be increased by a fixed value each time, may be increased by a fixed proportion, or may be increased from the first pressure having the smallest value to the second pressure having the largest value in sequence according to a plurality of preset pressure values including the first pressure and the second pressure. The flow rate, pressure at the respective media injection port and the pressure at the media outflow port can be sensed after each increment. The resistance to the medium in the fuel cell at the flow rate can be obtained according to the difference value of the two pressures, so that whether the fuel cell is normal or not can be judged.
Alternatively, the ends of the medium inlet pipe 10 and the medium outlet pipe 20 for connection to the fuel cell may each be provided with a quick coupling. The quick coupling is a coupling that can connect or disconnect the pipes without using tools, and is easy to operate, and can facilitate the connection and disconnection of the medium inlet pipe 10 and the medium outlet pipe 20 to and from the fuel cell.
The medium injection pipe 10 and the medium outflow pipe 20 may be metal pipes, which are hard and do not bend during the testing process, so as to avoid the pressure and flow changes caused by the bending of the pipe during the testing process, and improve the testing accuracy.
Fig. 2 is a schematic structural diagram of another fuel cell flow resistance testing device provided in an embodiment of the invention. As shown in fig. 2, the flow resistance test device may further include a first gate valve 22 for controlling on/off of the medium outflow pipe 20, and the first gate valve 22 is disposed on the medium outflow pipe 20. The fuel cell may have leakage due to a manufacturing process or a material, and when a test is performed, a medium is introduced through the medium injection pipe 10, the first gate valve 22 is closed after a period of time, and pressure maintaining is performed on the fuel cell, so that whether the fuel cell leaks or not can be judged according to a change of the pressure detected by the first pressure sensor 11 within a preset time, the sealing performance of the fuel cell can be detected, and a subsequent test can be continuously performed after the fuel cell is ensured not to leak. If the gas medium is used, the medium can be continuously introduced into the medium injection pipe 10 after the first gate valve 22 is closed, the outer surface of the fuel cell is coated with soapy water, if bubbles appear on the surface of the fuel cell, the surface leaks, the sealing performance is poor, and if no bubbles exist, the surface does not leak, and the sealing performance is good.
Optionally, the preset time may be 1min to 10 min.
As shown in fig. 2, the flow resistance testing device may further include a second gate valve 15 for controlling the on/off of the medium injection pipe 10. A second gate valve 15 is arranged on the medium inlet pipe 10, and a first pressure sensor 11 is located at the outlet end of the second gate valve 15. When the pressure is maintained and the tightness of the fuel cell is tested, the first gate valve 22 is closed first, the medium is continuously introduced for a period of time, after the pressure in the fuel cell rises, the second gate valve 15 is closed to isolate the medium source and the fuel cell, and the detection of the tightness is prevented from being influenced by the pressure fluctuation of the medium source. It is possible to determine whether there is a leak of the fuel cell based on a change in the pressure of the first pressure sensor 11 within a preset time.
In other possible implementations, the second pressure sensor 21 may also be located at the inlet end of the first gate valve 22. It is also possible to determine whether there is a leak in the fuel cell by a change in the pressure of the second pressure sensor 21 over a preset time.
As shown in fig. 2, the flow resistance test device may further include a second flow sensor 23 for detecting a flow rate of the medium outflow port, the second flow sensor 23 being provided on the medium outflow pipe 20. Since no reaction takes place in the fuel cell, gas is used as a medium, gas is not consumed when passing through the fuel cell, and liquid is used as a medium, and liquid is not gasified during the test, the flow rate of the medium outlet and the flow rate of the medium inlet should be equal. By comparing the value detected by the second flow sensor 23 with the value detected by the first flow sensor 12, it is possible to determine whether or not the fuel cell has leaked during the test. Even if the tightness test is passed, there is a possibility that a defect exists inside due to a quality problem of the fuel cell itself, and the defect of the fuel cell is not exposed during the tightness test, but is exposed during the process that the pressure of the medium injection port is increased from the first pressure to the second pressure, and a leak occurs. The relationship between the value detected by the second flow sensor 23 and the value detected by the first flow sensor 12 may reflect whether a leak has occurred. If there is a large deviation between the value detected by the second flow sensor 23 and the value detected by the first flow sensor 12, this may indicate that a leak has occurred during the test, and the test may be stopped, and the fuel cell may be serviced or otherwise treated.
There may be some deviation between the value detected by the second flow sensor 23 and the value detected by the first flow sensor 12 due to the sensors themselves, media pressure fluctuations, etc., but the deviation is generally small, e.g., the deviation does not exceed 5%. If a leak occurs, the medium will overflow from the leak, which will cause a large drop in the value detected by the second flow sensor 23 and thus a large deviation.
The first flow sensor 12 and the second flow sensor 23 may each be a turbine flow sensor. The turbine flow sensor has higher precision and higher anti-interference capability, can accurately measure the flow of injected and flowed media, is convenient for being connected with a computer for data processing, and can also zero the recorded flow numerical value.
Optionally, the flow resistance testing device may further comprise an alarm. The alarm is configured to issue an alarm when the deviation of the pressure of the medium outlet from the reference pressure exceeds a predetermined range. The reference pressure is a reference value of the pressure at the medium outlet corresponding to the current pressure at the medium inlet at the current medium injection flow rate. In the test, if the medium is injected at a certain flow rate, the pressure of the medium outflow port and the pressure of the medium injection port have a corresponding relationship, and a is between the first pressure and the second pressure when the pressures of the medium injection ports are all a, the difference between the pressure of the medium outflow port and the reference pressure at the flow rate and the pressure of the medium injection port is not large for a qualified fuel cell, and the deviation does not exceed a predetermined range, while the deviation is large for a unqualified fuel cell and exceeds the predetermined range. The deviation can be the difference between the pressure at the medium outflow opening and the reference pressure or the ratio of this difference to the reference pressure.
The pressure at the medium outflow of a normal fuel cell under test can be used as a reference pressure by performing a flow resistance test on a known normal fuel cell. The reference pressure is different at different flow rates, i.e. one reference pressure for each flow rate.
For two normal fuel cells, even if the models are the same, the pressure at the medium outflow port may be different at the time of the test, so that a plurality of known normal fuel cells can be tested with the average value of the pressures at the medium outflow ports of these normal fuel cells at the time of the test as the reference pressure.
Illustratively, the alarm may include any one of an audible alarm, a light alarm, and an audible and visual alarm. Different alarm forms can be set according to different requirements so as to be known by workers.
Fig. 3 is a flowchart of a flow resistance testing method for a fuel cell according to an embodiment of the present invention. The method may be applied to the flow resistance testing device shown in fig. 1 or 2. As shown in fig. 3, the method includes:
s11: the medium is injected into the medium injection port of the fuel cell.
S12: the pressure in the media injection port is increased to increase the pressure in the media injection port from the first pressure to a second pressure.
The first pressure is the lower limit pressure of the medium introduced when the fuel cell works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell works.
S13: the flow rate and pressure of the medium inlet and the pressure of the medium outlet of the fuel cell are detected.
The pressure of the medium injection opening is increased from a first pressure to a second pressure by injecting the medium into the medium injection opening of the fuel cell and increasing the pressure of the medium injection opening, the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, the second pressure is the upper limit pressure of the medium introduced when the fuel cell works, the pressure range of the medium inlet of the fuel cell can be simulated when the fuel cell actually works, and by detecting the pressure of the medium inlet and the pressure of the medium outlet of the fuel cell, the resistance to the medium in the fuel cell can be obtained according to the difference value of the two pressures, and the resistance to the medium in the fuel cell can be obtained under the condition of different flow rates by detecting the flow rate of the medium injection port, therefore, the flow resistance of the fuel cell when the medium is injected at any flow and pressure is tested, and the normal operation of the fuel cell is ensured.
Fig. 4 is a flow chart of another fuel cell flow resistance testing method according to an embodiment of the present invention. The method may be applied to the flow resistance testing device shown in fig. 1 or 2. As shown in fig. 4, the method includes:
s21: the medium is injected into the medium injection port of the fuel cell.
Referring to fig. 1, the medium injection port of the fuel cell 1 may include a hydrogen injection port 1a, an air injection port 1c, and a cooling water injection port 1e, and the medium outflow port may include a hydrogen outflow port 1b, an air outflow port 1d, and a cooling water outflow port 1f, and when a flow resistance test is performed on the fuel cell, a flow resistance between the hydrogen injection port 1a and the hydrogen outflow port 1b, a flow resistance between the air injection port 1c and the air outflow port 1d, and a flow resistance between the cooling water injection port 1e and the cooling water outflow port 1f in the fuel cell may be obtained by the respective tests. In testing the hydrogen injection port 1a and the air injection port 1c, the medium used may be a gaseous medium, such as hydrogen, nitrogen, air, or helium. In testing the cooling water inlet 1e, the medium used may be a liquid medium such as water, although a gaseous medium may also be used.
S22: and maintaining the pressure of the fuel cell.
S23: and judging whether the fuel cell has leakage or not according to the pressure change of the medium inlet or the medium outlet within the preset time.
The fuel cell may have leakage due to a manufacturing process or a material, and when the fuel cell is tested, the fuel cell is subjected to pressure maintaining, so that whether the fuel cell has leakage or not can be judged according to pressure change of the medium inlet or the medium outlet within a preset time, the tightness of the fuel cell can be detected, and subsequent tests can be continued after the fuel cell is ensured not to have leakage.
Optionally, the preset time may be 1min to 10 min.
S24: the pressure in the media injection port is increased to increase the pressure in the media injection port from the first pressure to a second pressure.
The first pressure is the lower limit pressure of the medium introduced when the fuel cell works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell works.
In the process of increasing the pressure of the medium injection port from the first pressure to the second pressure, the pressure may be increased by a fixed value each time, may be increased by a fixed proportion, or may be increased from the first pressure having the smallest value to the second pressure having the largest value in sequence according to a plurality of preset pressure values including the first pressure and the second pressure.
S25: the flow rate and pressure of the medium inlet and the pressure of the medium outlet of the fuel cell are detected.
Step S25 may be performed simultaneously with step S24, and the flow rate, pressure, and pressure of the respective media injection port and media outflow port may be detected after each increment. The resistance to the medium in the fuel cell at the flow rate can be obtained according to the difference value of the two pressures, so that whether the fuel cell is normal or not can be judged.
S26: an alarm is issued when the deviation of the pressure at the medium outflow from the reference pressure exceeds a predetermined range.
The reference pressure is a reference value of the pressure at the medium outlet port corresponding to the current pressure at the medium inlet port at the current medium injection flow rate.
In the test, if the medium is injected at a certain flow rate, the pressure of the medium outflow port and the pressure of the medium injection port have a corresponding relationship, and a is between the first pressure and the second pressure when the pressures of the medium injection ports are all a, the difference between the pressure of the medium outflow port and the reference pressure at the flow rate and the pressure of the medium injection port is not large for a qualified fuel cell, and the deviation does not exceed a predetermined range, while the deviation is large for a unqualified fuel cell and exceeds the predetermined range. The deviation can be the difference between the pressure at the medium outflow opening and the reference pressure or the ratio of this difference to the reference pressure.
The pressure at the medium outflow of a normal fuel cell under test can be used as a reference pressure by performing a flow resistance test on a known normal fuel cell. The reference pressure is different at different flow rates, i.e. one reference pressure for each flow rate.
For two normal fuel cells, even if the models are the same, the pressure at the medium outflow port may be different at the time of the test, so that a plurality of known normal fuel cells can be tested with the average value of the pressures at the medium outflow ports of these normal fuel cells at the time of the test as the reference pressure.
Alternatively, the alarm may comprise any one of an audible alarm, a light alarm, and an audible and visual alarm. Different alarm forms can be set according to different requirements so as to be known by workers.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flow resistance testing device of a fuel cell, characterized by comprising:
a medium injection pipe (10) for connecting to a medium injection port of the fuel cell (1);
a first pressure sensor (11) for detecting the pressure of the medium injection opening, which is arranged on the medium injection pipe (10);
a first flow sensor (12) for detecting a flow rate of the medium injection port, provided in the medium injection pipe (10);
a regulating valve (13) for regulating the pressure of the medium injection opening, which is arranged on the medium injection pipe (10);
a regulating valve controller (14) for increasing the pressure of the medium inlet from a first pressure to a second pressure, the regulating valve controller (14) being connected to the regulating valve (13), the first pressure being a lower limit pressure of the medium introduced during operation of the fuel cell (1), the second pressure being an upper limit pressure of the medium introduced during operation of the fuel cell (1);
a medium outflow pipe (20) having one end for connection to a medium outflow port of the fuel cell (1);
a second pressure sensor (21) for detecting the pressure at the medium outlet opening is arranged on the medium outlet pipe (20).
2. A flow resistance test device according to claim 1, further comprising a first gate valve (22) for controlling the on/off of the medium outflow tube (20), the first gate valve (22) being arranged on the medium outflow tube (20).
3. A flow resistance testing device according to claim 2, further comprising a second gate valve (15) for controlling the on/off of the medium injection tube (10), wherein the second gate valve (15) is arranged on the medium injection tube (10), wherein the first pressure sensor (11) is located at the outlet end of the second gate valve (15), or wherein the second pressure sensor (21) is located at the inlet end of the first gate valve (22).
4. A flow resistance test device according to claim 1, further comprising a second flow sensor (23) for detecting the flow of the medium flow outlet, the second flow sensor (23) being arranged on the medium flow outlet tube (20).
5. A flow resistance test device according to claim 1, further comprising an alarm configured to issue an alarm when the deviation of the pressure of the medium flow outlet from a reference pressure, which is a reference value of the pressure of the medium flow outlet corresponding to the current pressure of the medium injection inlet at the current medium injection flow rate, exceeds a predetermined range.
6. A flow resistance testing device according to claim 5, wherein said alarm comprises any one of an audible alarm, a light alarm, and an audible and visual alarm.
7. A flow resistance test method of a fuel cell, characterized by comprising:
injecting a medium into a medium injection port of the fuel cell;
increasing the pressure of the medium injection port to enable the pressure of the medium injection port to be increased from a first pressure to a second pressure, wherein the first pressure is the lower limit pressure of the medium introduced when the fuel cell works, and the second pressure is the upper limit pressure of the medium introduced when the fuel cell works;
the flow rate and pressure of the medium inlet and the pressure of the medium outlet of the fuel cell are detected.
8. A flow resistance test method as claimed in claim 7, wherein prior to said increasing the pressure of the media injection port, the method further comprises:
maintaining the pressure of the fuel cell;
and judging whether the fuel cell has leakage or not according to the pressure change of the medium injection port or the medium outflow port within a preset time.
9. The flow resistance test method of claim 7, further comprising:
an alarm is issued when the deviation of the pressure at the medium outlet from a reference pressure, which is a reference value of the pressure at the medium outlet corresponding to the current pressure at the medium inlet at the current medium injection flow rate, exceeds a predetermined range.
10. A flow resistance test method according to claim 9, wherein the alarm comprises any one of an audible alarm, a light alarm, and an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910829507.0A CN110661016A (en) | 2019-09-03 | 2019-09-03 | Flow resistance testing device and flow resistance testing method of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910829507.0A CN110661016A (en) | 2019-09-03 | 2019-09-03 | Flow resistance testing device and flow resistance testing method of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110661016A true CN110661016A (en) | 2020-01-07 |
Family
ID=69037826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910829507.0A Pending CN110661016A (en) | 2019-09-03 | 2019-09-03 | Flow resistance testing device and flow resistance testing method of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110661016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964346A (en) * | 2020-07-20 | 2022-01-21 | 国家能源投资集团有限责任公司 | Gas distribution plate for fuel cell stack, pressure drop test platform and test method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006147240A (en) * | 2004-11-17 | 2006-06-08 | Nissan Motor Co Ltd | Fuel cell system |
| CN205319236U (en) * | 2015-12-25 | 2016-06-15 | 新源动力股份有限公司 | Detect device of fuel cell bipolar plate resistance uniformity |
| CN105895939A (en) * | 2016-04-27 | 2016-08-24 | 北京建筑大学 | Dynamic performance test system of vehicle fuel cell and working method of dynamic performance test system |
| CN106941184A (en) * | 2017-03-09 | 2017-07-11 | 清华大学 | Hydrogen pressure differential detection method, detection means and hydrogen differential pressure pickup |
| CN210866377U (en) * | 2019-09-03 | 2020-06-26 | 武汉中极氢能产业创新中心有限公司 | Flow resistance testing device of fuel cell |
-
2019
- 2019-09-03 CN CN201910829507.0A patent/CN110661016A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006147240A (en) * | 2004-11-17 | 2006-06-08 | Nissan Motor Co Ltd | Fuel cell system |
| CN205319236U (en) * | 2015-12-25 | 2016-06-15 | 新源动力股份有限公司 | Detect device of fuel cell bipolar plate resistance uniformity |
| CN105895939A (en) * | 2016-04-27 | 2016-08-24 | 北京建筑大学 | Dynamic performance test system of vehicle fuel cell and working method of dynamic performance test system |
| CN106941184A (en) * | 2017-03-09 | 2017-07-11 | 清华大学 | Hydrogen pressure differential detection method, detection means and hydrogen differential pressure pickup |
| CN210866377U (en) * | 2019-09-03 | 2020-06-26 | 武汉中极氢能产业创新中心有限公司 | Flow resistance testing device of fuel cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964346A (en) * | 2020-07-20 | 2022-01-21 | 国家能源投资集团有限责任公司 | Gas distribution plate for fuel cell stack, pressure drop test platform and test method |
| CN113964346B (en) * | 2020-07-20 | 2023-06-16 | 国家能源投资集团有限责任公司 | Gas distribution plate, pressure drop test platform and test method for fuel cell stack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104180958A (en) | Device and method for testing fuel cell stack leakage rate | |
| CN210866377U (en) | Flow resistance testing device of fuel cell | |
| CN110987324A (en) | Fuel cell air tightness testing device and testing method | |
| CN112240819A (en) | Valve detection system | |
| KR100731148B1 (en) | A performance test equipments of multi-channel fuel cell | |
| CN111693229A (en) | Electric pile testing device and system with air tightness online detection function | |
| CN102278302B (en) | Mechanical seal identification platform and method for reactor coolant pump of million-kilowatt nuclear power station | |
| CN112290062A (en) | Hydrogen safety test system of fuel cell automobile | |
| CN108469390B (en) | Detachable loop type single-phase flow erosion test device | |
| CN110411676B (en) | Valve leakage detection device | |
| CN111982252A (en) | Water meter test board | |
| CN110661016A (en) | Flow resistance testing device and flow resistance testing method of fuel cell | |
| CN109884263B (en) | Dissolved oxygen sensor test device and test method thereof | |
| CN212567830U (en) | Electric pile testing device and system with air tightness online detection function | |
| CN111982420B (en) | Fuel cell stack differential pressure type air leakage testing device and testing method | |
| CN113280983A (en) | On-line diagnosis method for internal leakage of pneumatic regulating valve | |
| CN110425745B (en) | Method and device for water heater and water heater | |
| CN108760271B (en) | Safety valve opening and closing pressure testing device and method for simulating actual working conditions | |
| CN215294548U (en) | Standard meter method compressed hydrogen adds mechanism of qi calibrating installation | |
| CN209821181U (en) | Dissolved oxygen sensor test device | |
| CN212159042U (en) | Flow resistance testing system for converter valve assembly | |
| CN211829060U (en) | Flow battery pipeline system convenient to detect leakproofness | |
| CN211373965U (en) | Air tightness detection system for bipolar plate | |
| CN221055991U (en) | Device for detecting airtight flow resistance of single cell of fuel cell | |
| CN219391645U (en) | Automatic circulation pressure test equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |