CN215641103U - Multi-range fuel cell tail hydrogen discharge concentration testing device - Google Patents
Multi-range fuel cell tail hydrogen discharge concentration testing device Download PDFInfo
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- CN215641103U CN215641103U CN202121480067.1U CN202121480067U CN215641103U CN 215641103 U CN215641103 U CN 215641103U CN 202121480067 U CN202121480067 U CN 202121480067U CN 215641103 U CN215641103 U CN 215641103U
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 176
- 239000000446 fuel Substances 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 169
- 239000007789 gas Substances 0.000 claims abstract description 117
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000005070 sampling Methods 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
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- 230000009471 action Effects 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a multi-range fuel cell tail exhaust hydrogen concentration testing device which comprises a tail gas pretreatment module and a hydrogen concentration detection module. Treat gaseous through the processing of tail gas pretreatment module, the output is in the gaseous to be detected of the operating temperature humidity range of hydrogen concentration detection module and to be detected in the hydrogen concentration detection module, avoids ordinary hydrogen concentration sensor unable problem of using under the high temperature and high humidity environment. Because the hydrogen concentration detection module comprises at least 3 hydrogen concentration sensors with different measuring ranges, and all the hydrogen concentration sensors are in a working state in an initial state, the accuracy of detecting the hydrogen concentration is improved through the hydrogen concentration sensors with different measuring ranges. In addition, when the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, the hydrogen concentration sensor is in a non-working state after the preset time is delayed, and therefore the problem that detected hydrogen concentration data are unstable in the switching process of different ranges is solved.
Description
Technical Field
The utility model relates to the technical field of hydrogen concentration detection devices, in particular to a multi-range fuel cell tail exhaust hydrogen concentration testing device.
Background
The national standards 'test method for hydrogen emission of fuel cell engine' and 'test method for hydrogen emission of whole fuel cell electric vehicle' stipulate a detection method for hydrogen emission of fuel cell engine, and require measurement of hydrogen emission relative volume concentration from the start of fuel cell engine until the fuel cell engine is completely shut down; the measurement point is positioned 100mm outside the exhaust port and on the extension line of the geometric center line of the exhaust port.
The fuel cell has high operation temperature, and the gas at the exhaust outlet of the engine is high-temperature and high-humidity, so that the detection equipment is required to be highly required in the detection state. For the purpose that realizes that ordinary hydrogen concentration sensor uses under the high temperature and high humidity environment, some increase waterproof ventilated membrane in collection mouth department, but the device makes the tail calandria flow resistance increase, and has waterproof ventilated membrane to block up the risk, easily causes and detects inaccurate phenomenon. Still another is to mount a hydrogen concentration sensor on the gas-liquid separator, but the measurement point position is deviated from the national standard requirement "100 mm outside the exhaust port and on the extension line of the geometric center line of the exhaust port". In addition, the detection accuracy of the detection device is not high.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention aims to provide a multi-range fuel cell tail-exhaust hydrogen concentration testing device, which aims to realize the application of a common hydrogen concentration sensor in a high-temperature and high-humidity environment and improve the detection accuracy of hydrogen concentration.
In order to achieve the above object, the present invention provides the following solutions:
a multi-range fuel cell tail exhaust hydrogen concentration testing device comprises a tail gas pretreatment module and a hydrogen concentration detection module;
at a preset distance from the outlet of the fuel cell engine, the inlet of the tail gas pretreatment module is communicated with the outlet of the fuel cell engine through a gas sampling pipe, and the outlet of the tail gas pretreatment module is communicated with the inlet of the hydrogen concentration detection module and is used for outputting gas to be detected within the working temperature and humidity range of the hydrogen concentration detection module;
the hydrogen concentration detection module comprises at least 3 hydrogen concentration sensors with different measuring processes, and in an initial state, all the hydrogen concentration sensors are in a working state; and when the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, delaying the preset time for entering a non-working state by the hydrogen concentration sensor.
In a specific embodiment, in the adjacent hydrogen concentration sensors, the inlet and the outlet of the hydrogen concentration sensor with a smaller range are respectively provided with a switch valve, the switch valve at the outlet of the hydrogen concentration sensor with a smaller range is communicated with the inlet of the hydrogen concentration sensor with a larger range, and the inlet of the hydrogen concentration sensor with a larger range is also communicated with the outlet of the hydrogen concentration detection module.
In another specific embodiment, the predetermined time is 3 s;
the preset measuring range value is 98% of the measuring range of the concentration sensor;
the hydrogen concentration sensor is a pump-suction type hydrogen concentration sensor;
and the outlet of the tail gas pretreatment module is communicated with the inlet of the hydrogen concentration detection module through a hose.
In another specific embodiment, the tail gas pretreatment module comprises a gas-water separator, a three-way valve and a tail gas recovery device;
the inlet of the gas-water separator is communicated with the outlet of the fuel cell engine through the gas sampling pipe, the gas outlet of the gas-water separator is communicated with the inlet of the three-way valve, the first outlet of the three-way valve is communicated with the tail gas recovery device, and the second outlet of the three-way valve is communicated with the inlet of the hydrogen concentration detection module;
when the temperature of the gas to be detected is within the working temperature range of the hydrogen concentration detection module, the inlet of the three-way valve is communicated with the first outlet of the three-way valve;
and when the temperature of the gas to be detected is out of the working temperature range of the hydrogen concentration detection module, the inlet of the three-way valve is communicated with the second outlet of the three-way valve.
In another specific embodiment, the exhaust gas pretreatment module further comprises a first temperature sensor;
the first temperature sensor is arranged between the gas outlet of the gas-water separator and the inlet of the three-way valve and used for detecting the temperature of the gas to be detected.
In another specific embodiment, the exhaust gas pretreatment module further comprises a pressure sensor and a rotameter;
the inlet of the pressure sensor is communicated with the gas outlet of the gas-water separator, the outlet of the pressure sensor is communicated with the inlet of the rotor flow meter, and the outlet of the rotor flow meter is communicated with the inlet of the first temperature sensor.
In another specific embodiment, the exhaust gas pretreatment module further comprises a second temperature sensor and a secondary filter;
the inlet of the second temperature sensor is communicated with the outlet of the fuel cell engine through the gas sampling pipe, and the outlet of the second temperature sensor is communicated with the inlet of the gas-water separator;
the inlet of the secondary filter is communicated with the gas outlet of the gas-water separator, and the outlet of the secondary filter is communicated with the inlet of the pressure sensor.
In another specific embodiment, the exhaust gas pretreatment module further comprises a first on-off valve and a second on-off valve;
an inlet of the first on-off valve communicates with an outlet of the fuel cell engine through the gas sampling pipe, and an outlet of the first on-off valve communicates with an inlet of the second temperature sensor;
the second open-close valve is arranged at the water outlet of the gas-water separator.
In another specific embodiment, the multi-range fuel cell tail-exhausted hydrogen concentration testing device further comprises a data acquisition control module;
the data acquisition control module is in signal connection with the tail gas pretreatment module and the hydrogen concentration detection module.
In another specific embodiment, the data acquisition control module comprises a data acquisition module, a test system control module, and a rack control module;
the data acquisition module is respectively in signal connection with the tail gas pretreatment module and the hydrogen concentration detection module, and the test system control module is in signal connection with the data acquisition module;
the rack control module is in communication connection with the data acquisition module through a CAN box.
The various embodiments according to the utility model can be combined as desired, and the embodiments obtained after these combinations are also within the scope of the utility model and are part of the specific embodiments of the utility model.
When the multi-range fuel cell tail-exhausted hydrogen concentration testing device provided by the utility model is used, the inlet of the tail gas pretreatment module is communicated with the outlet of the fuel cell engine through the gas sampling pipe, and the inlet of the tail gas pretreatment module is away from the outlet of the fuel cell engine by a preset distance of 100mm, so that the device meets the national standard. The gas to be detected discharged from the outlet of the fuel cell engine is processed by the tail gas pretreatment module, and the gas to be detected within the working temperature and humidity range of the hydrogen concentration detection module is output to the hydrogen concentration detection module, so that the problem that a common hydrogen concentration sensor cannot be used in a high-temperature high-humidity environment is solved. Because the hydrogen concentration detection module comprises at least 3 hydrogen concentration sensors with different measuring ranges, and all the hydrogen concentration sensors are in a working state in an initial state, the accuracy of detecting the hydrogen concentration is improved through the hydrogen concentration sensors with different measuring ranges. In addition, when the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, the hydrogen concentration sensor is in a non-working state after the preset time is delayed, and therefore the problem that detected hydrogen concentration data are unstable in the switching process of different ranges is solved.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without novelty work.
Fig. 1 is a schematic structural diagram of a multi-range fuel cell tail-exhaust hydrogen concentration testing device provided by the utility model.
Wherein, in fig. 1:
the system comprises a tail gas pretreatment module 1, a hydrogen concentration detection module 2, a gas sampling pipe 3, a gas-water separator 101, a three-way valve 102, a tail gas recovery device 103, a first temperature sensor 104, a pressure sensor 105, a rotor flow meter 106, a second temperature sensor 107, a secondary filter 108, a first on-off valve 109, a second on-off valve 110, a data acquisition control module 4, a data acquisition module 401, a test system control module 402, a bench control module 403, a CAN box 404, a first hydrogen concentration sensor 201, a second hydrogen concentration sensor 202, a third hydrogen concentration sensor 203, an on-off valve 204, a fuel cell engine 5, an audible and visual alarm device 405 and a hose 6.
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 the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the position or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the utility model provides a multi-range fuel cell tail-exhaust hydrogen concentration testing device, which can realize the application of a common hydrogen concentration sensor in a high-temperature and high-humidity environment and improve the detection precision of hydrogen concentration.
Specifically, the multi-range fuel cell tail-exhausted hydrogen concentration testing device comprises a tail gas pretreatment module 1 and a hydrogen concentration detection module 2.
The outlet of the fuel cell engine 5 is communicated with the gas sampling pipe 3, and the gas sampling pipe 3 is communicated with the inlet of the tail gas pretreatment module 1 at a preset distance from the outlet of the fuel cell engine 5. Specifically, the preset distance is 100mm to meet the national standard.
The outlet of the tail gas pretreatment module 1 is communicated with the inlet of the hydrogen concentration detection module 2, and is used for outputting the gas to be detected within the working temperature and humidity range of the hydrogen concentration detection module 2, so that the problem that a common sensor cannot be used in a high-temperature and high-humidity environment is solved.
The hydrogen concentration detection module 2 comprises at least 3 hydrogen concentration sensors with different measuring ranges, and in an initial state, all the hydrogen concentration sensors are in a working state, so that the accuracy of detecting the hydrogen concentration is improved through the hydrogen concentration sensors with different measuring ranges.
When the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, the hydrogen concentration sensor is in a non-working state after delaying the preset time, so that the problem that detected hydrogen concentration data are unstable in the switching process of the hydrogen concentration sensors with different ranges is solved.
It should be noted that the operating state refers to that hydrogen can enter the hydrogen concentration sensor, and the hydrogen concentration sensor is in a state capable of detecting the hydrogen concentration; the non-operating state refers to a state in which the inlet end of the hydrogen concentration sensor is disconnected and hydrogen cannot pass through the hydrogen concentration sensor.
In some embodiments, the on-off valve 204 is disposed at the inlet and the outlet of the smaller range hydrogen concentration sensor, respectively, of the adjacent hydrogen concentration sensors, and the on-off valve 204 at the outlet of the smaller range hydrogen concentration sensor is communicated with the inlet of the larger range hydrogen concentration sensor, which is also communicated with the outlet of the hydrogen concentration detection module 2.
Taking the example that the hydrogen concentration detection module 2 includes 3 hydrogen concentration sensors with different measurement ranges, for convenience of description, the 3 hydrogen concentration sensors are respectively named as a first hydrogen concentration sensor 201, a second hydrogen concentration sensor 202, and a third hydrogen concentration sensor 203. The first hydrogen concentration sensor 201 is a hot-wire semiconductor type hydrogen concentration sensor, the second hydrogen concentration sensor 202 is a contact combustion type hydrogen concentration sensor, and the third hydrogen concentration sensor 203 is a gas heat conduction type hydrogen concentration sensor.
The preset time is 3s, namely when the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, the hydrogen concentration sensor is delayed for 3s and enters a non-working state. It is understood that the preset time of 3s is only one preferred embodiment of the present invention, and in practical applications, the preset time may be set to be greater than or less than 3 s.
The preset range value is 98% of the range of the concentration sensor, and it should be noted that the preset range value is only one preferred embodiment of the present invention, and in practical applications, the preset range value may be set to be greater than or less than 98% of the range of the concentration sensor.
Specifically, the utility model discloses that the hydrogen concentration sensor is a pump-suction type hydrogen concentration sensor, and the outlet pressure of the fuel cell engine 5 is one atmospheric pressure or micro negative pressure, so that automatic air extraction and sampling are realized by adopting the pump-suction type hydrogen concentration sensor. Specifically, the pumping type hydrogen concentration sensor is a hydrogen concentration sensor with a built-in micro air pump.
Further, the utility model discloses that the outlet of the tail gas pretreatment module 1 is communicated with the inlet of the hydrogen concentration detection module 2 through a hose 6, and the hose 6 is adopted to facilitate the communication between the outlet and the inlet. The outlet of the exhaust gas pretreatment module 1 and the inlet of the hydrogen concentration detection module 2 are not limited to be communicated through the hose 6, and may be communicated through a hard pipe or the like.
In some embodiments, the tail gas pretreatment module 1 includes a gas-water separator 101, a three-way valve 102 and a tail gas recovery device 103, an inlet of the gas-water separator 101 is communicated with an outlet of the fuel cell engine 5 through a gas sampling pipe 3, a gas outlet of the gas-water separator 101 is communicated with an inlet of the three-way valve 102, a first outlet of the three-way valve 102 is communicated with the tail gas recovery device 103, and a second outlet of the three-way valve 102 is communicated with an inlet of the hydrogen concentration detection module 2. Through the arrangement of the gas-water separator 101, the moisture contained in the gas discharged by the fuel cell engine 5 is reduced, and the problem that a conventional sensor cannot be used due to high gas humidity is further avoided.
When the temperature of the gas to be detected is outside the working temperature range of the hydrogen concentration detection module 2, the inlet of the three-way valve 102 is communicated with the second outlet of the three-way valve 102, so that the gas discharged from the fuel cell engine 5 enters the tail gas recovery device 103 through the three-way valve 102, and the damage to the hydrogen concentration sensor caused by overhigh gas temperature is avoided. It is understood that the outside of the operating temperature range of the hydrogen concentration detection module 2 herein refers to a temperature greater than the maximum temperature value at which the hydrogen concentration detection module 2 can perform normal detection.
When the temperature of the gas to be detected is within the operating temperature range of the hydrogen concentration detection module 2, the inlet of the three-way valve 102 is communicated with the first outlet of the three-way valve 102, so that the gas discharged from the fuel cell engine 5 enters the hydrogen concentration detection module 2 through the three-way valve 102.
Further, the present invention discloses that three-way valve 102 is a three-way solenoid valve. Three-way valve 102 may be a manual valve. Of course, instead of three- way valve 102, 2 on-off valves may be provided: the inlet of the tail gas recovery device 103 and the inlet of the hydrogen concentration detection module 2 are respectively provided with 1 on-off valve, and the inlets of the 2 on-off valves are communicated with the outlet of the fuel cell engine 5.
In some embodiments, the exhaust gas pretreatment module 1 further includes a first temperature sensor 104, and the first temperature sensor 104 is disposed between the gas outlet of the gas-water separator 101 and the inlet of the three-way valve 102, and is used for detecting the temperature of the gas to be detected. When the temperature detected by the first temperature sensor 104 is outside the operating temperature range of the hydrogen concentration detection module 2, the inlet of the three-way valve 102 is communicated with the second outlet of the three-way valve 102; when the temperature detected by the first temperature sensor 104 is within the operating temperature range of the hydrogen concentration detection module 2, the inlet of the three-way valve 102 communicates with the first outlet of the three-way valve 102.
In some embodiments, the exhaust gas pretreatment module 1 further comprises a pressure sensor 105 and a rotameter 106, an inlet of the pressure sensor 105 is communicated with the gas outlet of the gas-water separator 101, an outlet of the pressure sensor 105 is communicated with an inlet of the rotameter 106, and an outlet of the rotameter 106 is communicated with an inlet of the first temperature sensor 104. The pressure sensor 105 and the rotameter 106 can complete the airtightness detection of the whole multi-range fuel cell tail exhaust hydrogen concentration testing device.
In addition, adjusting rotameter 106 can also ensure that tail exhaust can evenly pass through the test system, ensuring test accuracy.
In some embodiments, the exhaust gas pretreatment module 1 further comprises a second temperature sensor 107 and a secondary filter 108, an inlet of the second temperature sensor 107 is communicated with an outlet of the fuel cell engine 5 through the gas sampling pipe 3, and an outlet of the second temperature sensor 107 is communicated with an inlet of the gas-water separator 101. The inlet of the secondary filter 108 is communicated with the gas outlet of the gas-water separator 101, the outlet of the secondary filter 108 is communicated with the inlet of the pressure sensor 105, the secondary filter 108 can complete secondary filtration of gas, and damage to the hydrogen concentration sensor caused by impurities entering the hydrogen concentration detection module 2 is avoided.
In some embodiments, the exhaust gas pretreatment module 1 further includes a first on-off valve 109 and a second on-off valve 110, an inlet of the first on-off valve 109 communicates with an outlet of the fuel cell engine 5 through the gas sampling pipe 3, an outlet of the first on-off valve 109 communicates with an inlet of the second temperature sensor 107, and the second on-off valve 110 is provided at a water outlet of the gas-water separator 101. Specifically, the first opening-closing valve 109 and the second opening-closing valve 110 are both manual ball valves. The first opening/closing valve 109 and the second opening/closing valve 110 may be solenoid valves or the like.
When the accumulated water in the gas-liquid separator needs to be discharged, the second opening/closing valve 110 is opened to discharge the water.
In some embodiments, the multi-range fuel cell tail-gas hydrogen-discharging concentration testing device further comprises a data acquisition control module 4, and the data acquisition control module 4 is in signal connection with the tail-gas pretreatment module 1 and the hydrogen concentration detection module 2. The data acquisition control module 4 can acquire each data in the tail gas pretreatment module 1 and the hydrogen concentration detection module 2, and can output each instruction for controlling the tail gas pretreatment module 1 and the hydrogen concentration detection module 2 according to each data.
Further, the present invention discloses that the data acquisition control module 4 includes a data acquisition module 401, a test system control module 402, and a rack control module 403.
The data acquisition module 401 is in signal connection with the tail gas pretreatment module 1 and the hydrogen concentration detection module 2, and is used for acquiring data of the tail gas pretreatment module 1 and the hydrogen concentration detection module 2.
The test system control module 402 is in signal connection with the data acquisition module 401 to receive each data acquired by the data acquisition module 401. Specifically, the test system control module 402 is capable of performing data processing to ensure that there is no sudden change in range during the hydrogen concentration sensor switching process. The system has the capability of monitoring and recording the instantaneous value of the hydrogen volume concentration in real time and calculating the maximum value of the instantaneous value, the average value in a period of time and the maximum value of the average value of the current hydrogen volume concentration in real time.
The rack control module 403 is in communication connection with the data acquisition module 401 through the CAN box 404, so that data synchronism is guaranteed, and subsequent test data analysis is facilitated. An alarm value is set through the test system control module 402 or the rack control module 403, when a detection value reaches the alarm value, the sound and light alarm device 405 turns on a red light with a buzzer, and turns on a green light during normal operation.
In some embodiments, the multi-range fuel cell tail-exhaust hydrogen concentration testing device further comprises moving trolley fast-assembly hardware, and the tail gas pretreatment module 1, the hydrogen concentration detection module 2 and the data acquisition control module 4 are all integrated on the moving trolley fast-assembly hardware, so that the device can be conveniently moved and used on different fuel cell testing tables, and the testing efficiency is improved.
According to the multi-range fuel cell tail exhaust hydrogen concentration testing device, the tail gas pretreatment module 1 is used for enabling gas after water removal and impurity removal to uniformly pass through the hydrogen concentration detection module 2, and testing precision is guaranteed. The utility model can also monitor the temperature of the gas entering the hydrogen concentration detection module 2, and avoid the problem of damage of the hydrogen concentration sensor caused by high-temperature gas; the pumping type hydrogen concentration sensors with different ranges can simultaneously extract sample gas, all detection results are uploaded through the data acquisition module 401 through the quick switching of the electromagnetic valve, and the data processing is carried out through the test system control module 402, so that the range is ensured to have no mutation in the switching process. Meanwhile, the data of the test system control module 402 and the data of the engine CAN be communicated with each other through the CAN box 404, so that the data synchronism is guaranteed, and the subsequent test data analysis is facilitated.
It is 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 an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A multi-range fuel cell tail hydrogen discharge concentration testing device is characterized by comprising a tail gas pretreatment module and a hydrogen concentration detection module;
at a preset distance from the outlet of the fuel cell engine, the inlet of the tail gas pretreatment module is communicated with the outlet of the fuel cell engine through a gas sampling pipe, and the outlet of the tail gas pretreatment module is communicated with the inlet of the hydrogen concentration detection module and is used for outputting gas to be detected within the working temperature and humidity range of the hydrogen concentration detection module;
the hydrogen concentration detection module comprises at least 3 hydrogen concentration sensors with different measuring processes, and in an initial state, all the hydrogen concentration sensors are in a working state; and when the concentration of the gas to be detected is smaller than the preset range value of the hydrogen concentration sensor, delaying the preset time for entering a non-working state by the hydrogen concentration sensor.
2. The multi-range fuel cell tail-gas hydrogen concentration testing device according to claim 1, wherein in adjacent hydrogen concentration sensors, an inlet and an outlet of the hydrogen concentration sensor with a smaller range are respectively provided with a switch valve, the switch valve at the outlet of the hydrogen concentration sensor with a smaller range is communicated with the inlet of the hydrogen concentration sensor with a larger range, and the inlet of the hydrogen concentration sensor with a larger range is also communicated with the outlet of the hydrogen concentration detection module.
3. The multirange fuel cell tail hydrogen concentration test device of claim 2, wherein the preset time is 3 s;
the preset measuring range value is 98% of the measuring range of the concentration sensor;
the hydrogen concentration sensor is a pump-suction type hydrogen concentration sensor;
and the outlet of the tail gas pretreatment module is communicated with the inlet of the hydrogen concentration detection module through a hose.
4. The multi-range fuel cell tail-gas hydrogen concentration testing device according to claim 1, wherein the tail gas pretreatment module comprises a gas-water separator, a three-way valve and a tail gas recovery device;
the inlet of the gas-water separator is communicated with the outlet of the fuel cell engine through the gas sampling pipe, the gas outlet of the gas-water separator is communicated with the inlet of the three-way valve, the first outlet of the three-way valve is communicated with the tail gas recovery device, and the second outlet of the three-way valve is communicated with the inlet of the hydrogen concentration detection module;
when the temperature of the gas to be detected is within the working temperature range of the hydrogen concentration detection module, the inlet of the three-way valve is communicated with the first outlet of the three-way valve;
and when the temperature of the gas to be detected is out of the working temperature range of the hydrogen concentration detection module, the inlet of the three-way valve is communicated with the second outlet of the three-way valve.
5. The multi-range fuel cell tail-out hydrogen concentration testing device of claim 4, wherein the tail gas pretreatment module further comprises a first temperature sensor;
the first temperature sensor is arranged between the gas outlet of the gas-water separator and the inlet of the three-way valve and used for detecting the temperature of the gas to be detected.
6. The multi-range fuel cell tail-out hydrogen concentration testing device of claim 5, wherein the tail gas pretreatment module further comprises a pressure sensor and a rotameter;
the inlet of the pressure sensor is communicated with the gas outlet of the gas-water separator, the outlet of the pressure sensor is communicated with the inlet of the rotor flow meter, and the outlet of the rotor flow meter is communicated with the inlet of the first temperature sensor.
7. The multi-range fuel cell tail-out hydrogen concentration testing device of claim 6, wherein the tail gas pretreatment module further comprises a second temperature sensor and a secondary filter;
the inlet of the second temperature sensor is communicated with the outlet of the fuel cell engine through the gas sampling pipe, and the outlet of the second temperature sensor is communicated with the inlet of the gas-water separator;
the inlet of the secondary filter is communicated with the gas outlet of the gas-water separator, and the outlet of the secondary filter is communicated with the inlet of the pressure sensor.
8. The multi-range fuel cell tail-gas hydrogen concentration testing device according to claim 7, wherein the tail gas pretreatment module further comprises a first on-off valve and a second on-off valve;
an inlet of the first on-off valve communicates with an outlet of the fuel cell engine through the gas sampling pipe, and an outlet of the first on-off valve communicates with an inlet of the second temperature sensor;
the second open-close valve is arranged at the water outlet of the gas-water separator.
9. The multirange fuel cell tail hydrogen concentration test device of any one of claims 1-8, further comprising a data acquisition control module;
the data acquisition control module is in signal connection with the tail gas pretreatment module and the hydrogen concentration detection module.
10. The multi-range fuel cell tail-out hydrogen concentration testing device of claim 9, wherein the data acquisition control module comprises a data acquisition module, a testing system control module and a bench control module;
the data acquisition module is respectively in signal connection with the tail gas pretreatment module and the hydrogen concentration detection module, and the test system control module is in signal connection with the data acquisition module;
the rack control module is in communication connection with the data acquisition module through a CAN box.
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| CN202121480067.1U CN215641103U (en) | 2021-06-30 | 2021-06-30 | Multi-range fuel cell tail hydrogen discharge concentration testing device |
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| CN202121480067.1U CN215641103U (en) | 2021-06-30 | 2021-06-30 | Multi-range fuel cell tail hydrogen discharge concentration testing device |
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Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: WEICHAI POWER Co.,Ltd. Country or region after: China Patentee after: Weichai New Energy Power Technology Co.,Ltd. Address before: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee before: WEICHAI POWER Co.,Ltd. Country or region before: China Patentee before: Weichai New Energy Technology Co.,Ltd. |