Fuel cell testing device and fuel cell system

Abstract

The utility model provides a fuel cell test device and a fuel cell system, the fuel cell test device comprises a main test pipeline, a gas analyzer, a prediction test pipeline and an inspection pipeline, the gas analyzer is arranged on the main test pipeline; the prediction test pipeline is respectively communicated with an inlet of the main test pipeline and the gas supply source; an outlet of the inspection pipeline is communicated with an inlet of the main test pipeline, and an inlet of the inspection pipeline is communicated with the gas filter; wherein the prediction test pipeline is used for conveying gas which is not filtered by the gas filter into the main test pipeline, and component detection is carried out by the gas analyzer; the inspection pipeline is used for conveying the gas filtered by the gas filter into the main test pipeline, and component detection is carried out by the gas analyzer. According to the utility model, the working condition of the gas filter can be efficiently detected, so that the real-time detection of the gas filter in the fuel cell system is realized, and the working reliability of the gas filter is verified.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell testing device and a fuel cell system. Background Art

[0002] The cathode of the fuel cell is easily poisoned and polluted by impurity gases (such as carbon monoxide, hydrogen, ammonia, etc.). These pollutants may reduce the performance of the fuel cell in various ways. Therefore, it is necessary to detect the gas composition of the gas entering the cathode of the fuel cell and treat the harmful gas. A common method in the prior art is to set a gas filter at the cathode gas inlet of the fuel cell to remove the impurity gas in the gas entering the cathode.

[0003] However, during the use of fuel cells, it is found that the fuel cell may gradually degrade in performance or fail as the operating time passes, and may be locally damaged. Therefore, there is an urgent need for a device that can test the fuel cell to detect the above problems. Utility Model Content

[0004] The utility model provides a fuel cell testing device and a fuel cell system, so as to solve the problem in the prior art that there is a lack of a testing device for real-time detection of whether a gas filter is invalid.

[0005] In order to solve the above problems, according to one aspect of the utility model, a fuel cell testing device is provided, which is used to test the gas filter in the fuel cell system, including: a main test pipeline, a gas analyzer, a pre-test pipeline and a test pipeline, the gas analyzer is arranged on the main test pipeline, and is used to measure the gas composition passing through the main test pipeline; the pre-test pipeline is connected to the inlet of the main test pipeline and the gas supply source respectively; the outlet of the test pipeline is connected to the inlet of the main test pipeline, and the inlet of the test pipeline is connected to the gas filter; wherein the pre-test pipeline is used to transport the gas that has not been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection; the test pipeline is used to transport the gas that has been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection.

[0006] Furthermore, the fuel cell testing device also includes an environmental detection pipeline and an air-driven pump. The environmental detection pipeline can be connected to the main test pipeline and the external environment in an on-off manner, so as to transport the air of the external environment to the gas analyzer for detection; the air-driven pump is arranged in the environmental detection pipeline to drive the air flow in the environmental detection pipeline.

[0007] Furthermore, the fuel cell testing device also includes a gas processing component, which can be connected to the outlet of the main test pipeline in an on-off manner; wherein, when the gas analyzer detects that the air composition meets the safety standards, the outlet of the main test pipeline is connected to the environmental detection pipeline to transport the detected air to the external environment for discharge; when the gas analyzer detects that the air composition does not meet the safety standards, the outlet of the main test pipeline is connected to the gas processing component, and the gas processing component safely processes the gas.

[0008] Furthermore, the fuel cell testing device also includes a sampling gas cylinder, a first one-way valve, a second one-way valve, a first valve and a second valve, which are respectively arranged on the main test pipeline, and the first valve is used to control the on-off of the inlet of the main test pipeline; the sampling gas cylinder is detachably arranged on the main test pipeline and is located between the inlet of the gas analyzer and the first valve to collect the gas in the main test pipeline that has not been analyzed by the gas analyzer; the first one-way valve is located between the sampling gas cylinder and the inlet of the gas analyzer; the second one-way valve is arranged at the outlet of the gas analyzer, and the second valve is located between the second one-way valve and the outlet of the gas analyzer, and the second valve is used to control the on-off of the outlet of the main test pipeline.

[0009] Furthermore, the fuel cell testing device also includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged at the inlet end of the gas filter to detect and obtain first pressure data; the second pressure sensor is arranged at the outlet end of the gas filter to detect and obtain second pressure data; by comparing the first pressure data and the second pressure data, the flow resistance change of the gas filter is detected.

[0010] Furthermore, the fuel cell testing device also includes a gas processing pipeline, a gas processing component respectively arranged on the gas processing pipeline and a third solenoid valve, the third solenoid valve is used to control the on-off of the gas processing pipeline; wherein, the outlet of the main test pipeline, the outlet of the pre-test pipeline, and the outlet of the inspection pipeline can be connected to the gas processing pipeline in an on-off manner, respectively, and the gas processing component is used to safely process the gas in the main test pipeline, the pre-test pipeline and the inspection pipeline.

[0011] Furthermore, the fuel cell testing device also includes a first exhaust pipeline and a second exhaust pipeline which are respectively connected to the outlet of the main test pipeline in a switchable manner. The first exhaust pipeline is connected to the inlet of the gas filter so that the gas analyzed by the gas analyzer can be filtered by the gas filter; the second exhaust pipeline is connected to the fuel cell stack in the fuel cell system so that the gas analyzed by the gas analyzer can be used by the fuel cell stack.

[0012] Furthermore, the fuel cell testing device also includes a purge assembly, which purges the main test pipeline to purge and discharge the gas in the main test pipeline; the purge assembly includes a purge pipeline, a purge gas supply source and a fourth solenoid valve respectively arranged on the purge pipeline, the purge pipeline is connected to the main test pipeline, the purge gas supply source is used to provide gas for purge, and the fourth solenoid valve is used to control the on and off of the purge pipeline.

[0013] Furthermore, the fuel cell testing device also includes a first solenoid valve and a second solenoid valve. The first solenoid valve is arranged on the pre-test pipeline to control the on-off of the pre-test pipeline and the main test pipeline; the second solenoid valve is arranged on the inspection pipeline to control the on-off of the inspection pipeline and the main test pipeline.

[0014] According to another aspect of the utility model, a fuel cell system is provided, comprising the above-mentioned fuel cell testing device; the fuel cell system also comprises a fuel cell stack, a gas filter, a cathode gas supply source, a first input pipeline, a first inlet valve arranged on the first input pipeline, a second input pipeline, and a second inlet valve arranged on the second input pipeline; the cathode gas supply source is respectively connected to the first input pipeline and the second input pipeline, and is used to supply gas to the cathode of the fuel cell stack; the first inlet valve is used to control the on-off of the first input pipeline, and the second inlet valve is used to control the on-off of the second input pipeline; wherein the first input pipeline is respectively connected to the inlet of the gas filter and the inlet of the pre-test pipeline; the second input pipeline is connected to the cathode of the fuel cell stack; the outlet of the gas filter is connected to the second input pipeline, so that the gas filtered by the gas filter can be used by the fuel cell stack.

[0015] Furthermore, the fuel cell system also includes a first bypass branch, a second bypass branch, a gas-water separator, a humidifying tank, a fifth solenoid valve, a sixth solenoid valve and a heating belt. The inlets of the first bypass branch and the second bypass branch are respectively connected to the outlet of the second input pipeline, and the outlets of the first bypass branch and the second bypass branch are respectively connected to the cathode of the fuel cell stack; the fifth solenoid valve is arranged on the first bypass branch to control the on-off of the first bypass branch; the sixth solenoid valve is arranged on the second bypass branch to control the on-off of the second bypass branch; the humidifying tank is arranged on the second bypass branch to humidify the gas; the heating belt is respectively wound around the first bypass branch and the second bypass branch to heat the gas; the fuel cell testing device also includes a gas processing pipeline and a gas processing assembly arranged on the gas processing pipeline. The inlet of the gas-water separator is connected to the gas outlet of the fuel cell stack, and the outlet of the gas-water separator is connected to the inlet of the gas processing pipeline. The gas processing assembly is used to safely process the gas discharged from the outlet of the gas-water separator.

[0016] Applying the technical scheme of the utility model, the utility model provides a fuel cell testing device, which is used to test the gas filter in the fuel cell system, including: a main test pipeline, a gas analyzer, a pre-test pipeline and a test pipeline, the gas analyzer is arranged on the main test pipeline, and is used to measure the gas composition passing through the main test pipeline; the pre-test pipeline is respectively connected with the inlet of the main test pipeline and the gas supply source; the outlet of the test pipeline is connected with the inlet of the main test pipeline, and the inlet of the test pipeline is connected with the gas filter; wherein the pre-test pipeline is used to transport the gas that has not been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection; the test pipeline is used to transport the gas that has been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection.

[0017] The utility model sets a main test pipeline, a gas analyzer, a pre-test pipeline and a test pipeline for cooperation. The pre-test pipeline conveys the gas that has not been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection to obtain a first gas parameter; the test pipeline conveys the gas that has been filtered by the gas filter into the main test pipeline, and the gas analyzer performs component detection to obtain a second gas parameter. By comparing the changes between the first gas parameter and the second gas parameter, the working condition of the gas filter can be efficiently detected, thereby realizing the function of real-time detection of the gas filter in the fuel cell system and verification of the working reliability. The utility model The new type can detect the composition of the gas after filtering by the gas filter, can realize the detection of the content of poisoned gas (including hydrogen) in the cathode gas, and can also provide a reference and early prevention for the subsequent detection of whether hydrogen is leaking; the utility model fills the gap in the prior art in the technology of detecting whether the gas filter is failed, avoids the phenomenon of gas blockage at the cathode or a large amount of impurity gas entering the fuel cell, and thus avoids the problem of safety accidents and fuel cell damage; the utility model has a simple structure, reliable operation and low cost, and can realize real-time monitoring of the gas filter without affecting the operation of the fuel cell stack and the gas filter, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A specific structural schematic diagram of a fuel cell system provided by an embodiment of the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 1. Main test pipeline; 2. Gas analyzer; 3. Pre-test pipeline; 4. Inspection pipeline; 5. Purge assembly; 51. Purge pipeline; 52. Purge gas supply source; 53. Fourth solenoid valve; 6. Environmental detection pipeline; 7. Air drive pump; 8. Gas treatment assembly; 9. Sampling gas cylinder; 10. First one-way valve; 11. Second one-way valve; 12. First valve; 13. Second valve; 14. First pressure sensor; 15. Second pressure sensor; 16. First solenoid valve; 17. Second solenoid valve ; 18. Gas processing pipeline; 19. Third solenoid valve; 20. First discharge pipeline; 21. Second discharge pipeline; 22. Fuel cell; 23. Gas filter; 24. Cathode gas supply source; 25. First input pipeline; 26. First inlet valve; 27. Second input pipeline; 28. Second inlet valve; 29. ​​First bypass branch; 30. Second bypass branch; 31. Gas-water separator; 32. Humidifier tank; 33. Fifth solenoid valve; 34. Sixth solenoid valve; 35. Heating belt; 36. External environment. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] like Figure 1 As shown, an embodiment of the utility model provides a fuel cell testing device, which is used to test a gas filter 23 in a fuel cell system, and includes: a main test pipeline 1, a gas analyzer 2, a pre-test pipeline 3 and a test pipeline 4, wherein the gas analyzer 2 is arranged on the main test pipeline 1, and is used to measure the gas composition passing through the main test pipeline 1; the pre-test pipeline 3 is respectively connected to the inlet of the main test pipeline 1 and the gas supply source; the outlet of the test pipeline 4 is connected to the inlet of the main test pipeline 1, and the inlet of the test pipeline 4 is connected to the gas filter 23; wherein the pre-test pipeline 3 is used to transport the gas that has not been filtered by the gas filter 23 into the main test pipeline 1, and the gas analyzer 2 performs component detection; the test pipeline 4 is used to transport the gas that has been filtered by the gas filter 23 into the main test pipeline 1, and the gas analyzer 2 performs component detection; by comparing the detection result of the gas analyzer 2, the working condition of the gas filter 23 is detected.

[0024] It should be noted that: in the actual use and testing of fuel cells, it was creatively discovered that the main reason for the gradual performance decline or failure of fuel cells is the lack of real-time detection of whether the gas filter has failed. Once the gas filter fails, it may cause gas blockage at the cathode or a large amount of impurity gas to enter the fuel cell, thereby causing serious safety accidents and fuel cell damage. With the development of hydrogen fuel cells and the actual use of hydrogen fuel cell systems, the increase in researchers' research on fuel cell poisoning tests and the need to study the performance of gas filters in fuel cell systems, a test device is needed that does not affect the operation of the gas filter and can realize real-time detection of the gas filter performance.

[0025] Therefore, in order to solve the technical problems found above, the utility model sets a main test pipeline 1, a gas analyzer 2, a pre-test pipeline 3 and a test pipeline 4 to work together. The pre-test pipeline 3 conveys the gas that has not been filtered by the gas filter 23 to the main test pipeline 1, and the gas analyzer 2 performs component detection to obtain a first gas parameter; the test pipeline 4 conveys the gas filtered by the gas filter 23 to the main test pipeline 1, and the gas analyzer 2 performs component detection to obtain a second gas parameter. By comparing the changes between the first gas parameter and the second gas parameter, the working condition of the gas filter 23 can be efficiently detected, thereby realizing real-time detection and verification of the gas filter 23 in the fuel cell system. Function of working reliability; the utility model can detect the gas composition after being filtered by the gas filter 23, can realize the detection of the content of cathode gas poisoning gas (including hydrogen), and can also provide reference and early prevention for the subsequent detection of whether hydrogen is leaking; the utility model fills the gap in the prior art of detecting whether the gas filter 23 is invalid, avoids the phenomenon of gas blockage at the cathode or a large amount of impurity gas entering the fuel cell, and thus avoids the problem of safety accidents and fuel cell damage; the utility model has a simple structure, reliable operation and low cost, and can realize real-time monitoring of the gas filter 23 without affecting the operation of the fuel cell stack 22 and the gas filter 23, and is suitable for large-scale promotion and use.

[0026] It should be noted that: in a specific embodiment of the present invention, in order to ensure the accuracy of the detection results of the first gas parameter and the second gas parameter, a test pipeline 4 can be set to transport the gas filtered by the gas filter 23 to the main test pipeline 1. After passing through for a period of time, the gas analyzer 2 performs component detection to obtain the second gas parameter. That is, the gas that has not been filtered by the gas filter 23 and remains in the main test pipeline 1 is discharged after ventilation for a period of time, and then the gas analyzer 2 performs accurate detection.

[0027] like Figure 1As shown, the fuel cell test device further includes an environment detection pipeline 6 and an air driven pump 7. The environment detection pipeline 6 can be connected to the main test pipeline 1 and the external environment 36 in an on-off manner, so as to deliver the air of the external environment 36 to the gas analyzer 2 for detection; the air driven pump 7 is arranged on the environment detection pipeline 6 to drive the air flow of the environment detection pipeline 6. With this arrangement, the fuel cell test device has the function of detecting the gas composition of the external environment 36, thereby fully ensuring the safety of the external environment 36.

[0028] It is worth mentioning that the prior art lacks detection and protection of the external environment safety during the fuel cell poisoning test process. The utility model realizes real-time detection of harmful gases in the environment with a simple structure by setting up an environmental detection pipeline 6 and an air-driven pump 7. It can then work in conjunction with other equipment to further protect the safety of testers.

[0029] like Figure 1 As shown, the fuel cell test device also includes a gas processing component 8, which can be connected to the outlet of the main test pipeline 1 in an on-off manner; wherein, when the gas analyzer 2 detects that the air composition meets the safety standard, the outlet of the main test pipeline 1 is connected to the environmental detection pipeline 6 to transport the detected air to the external environment 36 for discharge; when the gas analyzer 2 detects that the air composition does not meet the safety standard, the outlet of the main test pipeline 1 is connected to the gas processing component 8, and the gas processing component 8 safely processes the gas. This arrangement enables the fuel cell test device proposed by the utility model to have the function of purifying harmful gases in the external environment 36, thereby further ensuring the safety of test personnel and equipment.

[0030] like Figure 1 As shown, the fuel cell testing device also includes a sampling gas cylinder 9, a first one-way valve 10, a second one-way valve 11, a first valve 12 and a second valve 13 respectively arranged on the main test pipeline 1, and the first valve 12 is used to control the on-off at the inlet of the main test pipeline 1; the sampling gas cylinder 9 is detachably arranged on the main test pipeline 1, and is located between the inlet of the gas analyzer 2 and the first valve 12 to collect the gas in the main test pipeline 1 that has not been analyzed by the gas analyzer 2; the first one-way valve 10 is located between the sampling gas cylinder 9 and the inlet of the gas analyzer 2; the second one-way valve 11 is arranged at the outlet of the gas analyzer 2, and the second valve 13 is located between the second one-way valve 11 and the outlet of the gas analyzer 2, and the second valve 13 is used to control the on-off at the outlet of the main test pipeline 1.

[0031] With this arrangement, the fuel cell testing device proposed in the utility model not only has the function of detecting the gas composition before and after filtration, but can also collect and store the gas samples detected each time; in addition, subsequent detection of the gas samples collected by the sampling gas cylinder 9 can also verify whether the accuracy of the analysis results of the gas analyzer 2 meets the actual use requirements.

[0032] like Figure 1 As shown, the fuel cell test device further includes a first pressure sensor 14 and a second pressure sensor 15. The first pressure sensor 14 is arranged at the inlet end of the gas filter 23 to detect and obtain first pressure data; the second pressure sensor 15 is arranged at the outlet end of the gas filter 23 to detect and obtain second pressure data; the first pressure data and the second pressure data are compared to detect the change of the flow resistance of the gas filter 23. By arranging the first pressure sensor 14 and the second pressure sensor 15 to work together, the pressures at the outlet end and the inlet end of the gas filter 23 can be monitored in real time, and then by comparing the first pressure data and the second pressure data, it can be detected in real time whether the flow resistance of the gas filter 23 increases or decreases abnormally, thereby preventing the gas filter 23 from being clogged.

[0033] In a specific embodiment of the utility model, the first pressure sensor 14 and the second pressure sensor 15 before and after the gas filter 23 can detect and calculate the flow resistance of the gas through the gas filter 23 in real time. When the flow resistance is abnormally too large, the pressure at the inlet end of the gas filter 23 can be detected, which facilitates timely shutdown of the fuel cell testing device and the fuel cell system, effectively avoiding the occurrence of safety accidents.

[0034] like Figure 1 As shown, the fuel cell test device also includes a gas processing pipeline 18, a gas processing assembly 8 and a third solenoid valve 19 respectively arranged on the gas processing pipeline 18, and the third solenoid valve 19 is used to control the on-off of the gas processing pipeline 18; wherein, the outlet of the main test pipeline 1, the outlet of the pre-test pipeline 3, and the outlet of the inspection pipeline 4 can be connected to the gas processing pipeline 18 respectively, and the gas processing assembly 8 is used to safely process the gas in the main test pipeline 1, the pre-test pipeline 3, and the inspection pipeline 4. By setting the gas processing pipeline 18 and the gas processing assembly 8, the gas in the main test pipeline 1, the pre-test pipeline 3, and the inspection pipeline 4 can be safely processed, which not only ensures safety but also avoids environmental pollution.

[0035] like Figure 1As shown, the fuel cell testing device also includes a first exhaust pipeline 20 and a second exhaust pipeline 21 which are respectively connected to the outlet of the main test pipeline 1 in a switchable manner. The first exhaust pipeline 20 is connected to the inlet of the gas filter 23 so that the gas analyzed by the gas analyzer 2 can be filtered by the gas filter 23; the second exhaust pipeline 21 is connected to the fuel cell stack 22 in the fuel cell system so that the gas analyzed by the gas analyzer 2 can be used by the fuel cell stack 22.

[0036] By setting the first exhaust pipeline 20 to be connected with the inlet of the gas filter 23, the gas analyzed by the gas analyzer 2 can be filtered by the gas filter 23, and when the gas filter 23 is not invalid, the reliable operation of the fuel cell system is guaranteed and the waste of gas is avoided. By setting the second exhaust pipeline 21 to be connected with the battery stack 22 in the test fuel cell system, the qualified gas can directly enter the battery stack 22 for use, which does not affect the normal operation of the battery stack 22 and avoids the waste of gas.

[0037] like Figure 1 As shown, the fuel cell testing device also includes a purge assembly 5, which purges the main test pipeline 1 to purge and discharge the gas in the main test pipeline 1; the purge assembly 5 includes a purge pipeline 51, a purge gas supply source 52 and a fourth solenoid valve 53 respectively arranged on the purge pipeline 51, the purge pipeline 51 is connected to the main test pipeline 1, the purge gas supply source 52 is used to provide a purge gas (such as nitrogen or any other suitable gas, for ease of explanation, "nitrogen" will be used as an example below), and the fourth solenoid valve 53 is used to control the on-off of the purge pipeline 51.

[0038] By providing the purge assembly 5 , the main test pipeline 1 can be purged with a simple structure, thereby ensuring the accuracy and representativeness of the test results of the gas analyzer 2 each time it is tested.

[0039] like Figure 1 As shown, in a specific embodiment of the utility model, the function of nitrogen purging is realized by controlling the fourth solenoid valve 53 and the solenoid valve on the branch at the outlet of the second one-way valve 11 on the main test pipeline 1 to work in coordination; during the test, after it is detected in real time that the concentration of harmful gases in the environment exceeds the safety limit, the purge component 5 can be linked with external equipment to promptly shut down the fuel cell system after purging the main test pipeline 1 to protect the safety of the test personnel.

[0040] like Figure 1As shown, the fuel cell test device further includes a first solenoid valve 16 and a second solenoid valve 17. The first solenoid valve 16 is arranged on the pre-test pipeline 3 to control the on-off of the pre-test pipeline 3 and the main test pipeline 1; the second solenoid valve 17 is arranged on the inspection pipeline 4 to control the on-off of the inspection pipeline 4 and the main test pipeline 1. By arranging the first solenoid valve 16 and the second solenoid valve 17, reliable control of the on-off of the pre-test pipeline 3 and the main test pipeline 1, and the on-off of the inspection pipeline 4 and the main test pipeline 1 is achieved, thereby ensuring safety and controllability.

[0041] It should be noted that: Figure 1 As shown, in a specific embodiment of the present invention, at the outlet of the second one-way valve 11 on the main test pipeline 1, each branch arranged in parallel is provided with a solenoid valve for realizing the switching function, so as to realize the on-off controllable of each branch, which will not be repeated here.

[0042] like Figure 1 As shown, the utility model also provides a fuel cell system, including the above-mentioned fuel cell testing device; the fuel cell system also includes a fuel cell stack 22, a gas filter 23, a cathode gas supply source 24, a first input pipeline 25, a first inlet valve 26 arranged on the first input pipeline 25, a second input pipeline 27, and a second inlet valve 28 arranged on the second input pipeline 27; the cathode gas supply source 24 is connected to the first input pipeline 25 and the second input pipeline 27 respectively, and is used to supply gas to the cathode of the fuel cell stack 22; the first inlet valve 26 is used to control the on-off of the first input pipeline 25, and the second inlet valve 28 is used to control the on-off of the second input pipeline 27; wherein the first input pipeline 25 is connected to the inlet of the gas filter 23 and the inlet of the pre-test pipeline 3 respectively; the second input pipeline 27 is connected to the cathode of the fuel cell stack 22; the outlet of the gas filter 23 is connected to the second input pipeline 27, so that the gas filtered by the gas filter 23 can be used by the fuel cell stack 22.

[0043] By setting the first input pipeline 25 and the second input pipeline 27, it is ensured that the normal operation of the fuel cell system is not affected when the fuel cell testing device is working; by setting the first inlet valve 26 and the second inlet valve 28, the operation of the fuel cell system is controllable and the working safety is guaranteed.

[0044] like Figure 1As shown, the fuel cell system also includes a first bypass branch 29, a second bypass branch 30, a gas-water separator 31, a humidifying tank 32, a fifth solenoid valve 33, a sixth solenoid valve 34 and a heating belt 35. The inlets of the first bypass branch 29 and the second bypass branch 30 are respectively connected to the outlet of the second input pipeline 27, and the outlets of the first bypass branch 29 and the second bypass branch 30 are respectively connected to the cathode of the fuel cell stack 22; the fifth solenoid valve 33 is arranged on the first bypass branch 29 to control the on and off of the first bypass branch 29; the sixth solenoid valve 34 is arranged on the second bypass branch 30 to control the on and off of the first bypass branch 29; The second bypass branch 30 is switched on and off; the humidifying tank 32 is arranged on the second bypass branch 30, and is used to humidify the gas; the heating belt 35 is respectively wound on the first bypass branch 29 and the second bypass branch 30, and is used to heat the gas; the fuel cell test device also includes a gas processing pipeline 18, a gas processing assembly 8 arranged on the gas processing pipeline 18, the inlet of the gas-water separator 31 is connected to the gas outlet of the stack 22, the outlet of the gas-water separator 31 is connected to the inlet of the gas processing pipeline 18, and the gas processing assembly 8 is used to safely process the gas discharged from the outlet of the gas-water separator 31. This arrangement not only ensures the working reliability of the fuel cell system, but also simplifies the structure of the fuel cell system, and effectively reduces the cost.

[0045] Now the specific working process and principle of the utility model are described in detail as follows:

[0046] 1. Open the first inlet valve 26, close the second inlet valve 28, and most of the gas supplied by the cathode gas supply source 24 flows to the gas filter 23 through the first inlet valve 26, that is, the gas flows to the gas filter 23 and the pre-test pipeline 3 respectively; open the first solenoid valve 16, and the gas passes through the first solenoid valve 16, the first valve 12, the sampling gas cylinder 9 and the first one-way valve 10 into the gas analyzer 2. After the gas analyzer 2 detects the gas composition, the gas passes through the second valve 13, the second one-way valve 11 and the solenoid valve, and converges with the gas at the inlet end of the gas filter 23 and then passes into the gas filter 23 for filtration; the sampling gas cylinder 9 is disassembled to complete the collection and storage of the sampled gas; the gas composition test process after filtration is basically the same as the gas detection process before filtration, that is, the second solenoid valve 17 cooperates with the solenoid valve at the outlet of the second one-way valve 11 to collect the filtered gas through the sampling gas cylinder 9 and detect it with the gas analyzer 2, and the performance of the gas filter 23 in the fuel cell poisoning gas test is verified by analyzing and comparing the changes between the first gas parameter and the second gas parameter;

[0047] 2. The first pressure sensor 14 and the second pressure sensor 15 before and after the gas filter 23 can detect the flow resistance of the gas through the gas filter 23. When the flow resistance is abnormally large, the pressure at the inlet end of the gas filter 23 can be detected, which is convenient for subsequent linkage with the test equipment for emergency stop. At the same time, the flow resistance detected can indirectly reflect the working condition of the gas filter 23;

[0048] 3. Nitrogen purging process. To ensure the accuracy and safety of the test, nitrogen must be fully purged between each test, that is, when switching the test channel by opening and closing the valve; by controlling the fourth solenoid valve 53 and the solenoid valve on the branch at the outlet of the second one-way valve 11 on the main test pipeline 1 to work together, the nitrogen in the purge gas supply source 52 can be introduced into the main test pipeline 1 for sufficient purging, and the gas in the purging process can be discharged to the gas treatment component 8 for safe treatment.

[0049] In summary, the utility model provides a fuel cell testing device and a fuel cell system. The utility model sets a main test pipeline 1, a gas analyzer 2, a pre-test pipeline 3 and a test pipeline 4 to work together. The pre-test pipeline 3 conveys the gas that has not been filtered by the gas filter 23 to the main test pipeline 1, and the gas analyzer 2 performs component detection to obtain a first gas parameter; the test pipeline 4 conveys the gas that has been filtered by the gas filter 23 to the main test pipeline 1, and the gas analyzer 2 performs component detection to obtain a second gas parameter. By comparing the changes between the first gas parameter and the second gas parameter, the working condition of the gas filter 23 can be efficiently detected, thereby realizing the detection of the gas filter 23 in the fuel cell system. Function of real-time detection and verification of working reliability; the utility model can detect the gas composition after being filtered by the gas filter 23, can realize the detection of the content of cathode gas poisoning gas (including hydrogen), and can also provide reference and early prevention for subsequent detection of hydrogen leakage; the utility model fills the gap in the prior art of detecting whether the gas filter 23 is invalid, avoids the phenomenon of gas blockage at the cathode or a large amount of impurity gas entering the fuel cell, and thus avoids the problem of safety accidents and fuel cell damage; the utility model has a simple structure, reliable operation and low cost, can realize real-time monitoring of the gas filter 23 without affecting the operation of the fuel cell stack 22 and the gas filter 23, and is suitable for large-scale promotion and use.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fuel cell testing device, characterized in that: The fuel cell testing device is used to test a gas filter (23) in a fuel cell system, and comprises: a main test pipeline (1), a gas analyzer (2), a pre-test pipeline (3) and a test pipeline (4); the gas analyzer (2) is arranged on the main test pipeline (1) and is used to measure the gas composition passing through the main test pipeline (1); the pre-test pipeline (3) is respectively connected to the inlet of the main test pipeline (1) and a gas supply source; the outlet of the test pipeline (4) is connected to the inlet of the main test pipeline (1), and the inlet of the test pipeline (4) is connected to the gas filter (23); wherein the pre-test pipeline (3) is used to transport the gas that has not been filtered by the gas filter (23) into the main test pipeline (1), and the gas analyzer (2) performs component detection; the test pipeline (4) is used to transport the gas that has been filtered by the gas filter (23) into the main test pipeline (1), and the gas analyzer (2) performs component detection.

2. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises an environment detection pipeline (6) and an air driven pump (7); the environment detection pipeline (6) is respectively connectable to the main test pipeline (1) and the external environment (36) so as to transport the air of the external environment (36) to the gas analyzer (2) for testing; and the air driven pump (7) is arranged in the environment detection pipeline (6) and is used to drive the air flow in the environment detection pipeline (6).

3. The fuel cell testing device according to claim 2, characterized in that: The fuel cell testing device further comprises a gas processing assembly (8), and the gas processing assembly (8) is connected to the outlet of the main test pipeline (1) in an on-off manner; wherein, when the gas analyzer (2) detects that the air composition meets the safety standard, the outlet of the main test pipeline (1) is connected to the environmental detection pipeline (6) to transport the detected air to the external environment (36) for discharge; when the gas analyzer (2) detects that the air composition does not meet the safety standard, the outlet of the main test pipeline (1) is connected to the gas processing assembly (8), and the gas processing assembly (8) safely processes the gas.

4. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a sampling gas cylinder (9), a first one-way valve (10), a second one-way valve (11), a first valve (12) and a second valve (13) respectively arranged on the main testing pipeline (1); the first valve (12) is used to control the on-off of the inlet of the main testing pipeline (1); the sampling gas cylinder (9) is detachably arranged on the main testing pipeline (1) and is located between the inlet of the gas analyzer (2) and the first valve (12) to collect gas in the main testing pipeline (1) that has not been analyzed by the gas analyzer (2); the first one-way valve (10) is located between the sampling gas cylinder (9) and the inlet of the gas analyzer (2); the second one-way valve (11) is arranged at the outlet of the gas analyzer (2), the second valve (13) is located between the second one-way valve (11) and the outlet of the gas analyzer (2), and the second valve (13) is used to control the on-off of the outlet of the main testing pipeline (1).

5. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a first pressure sensor (14) and a second pressure sensor (15), wherein the first pressure sensor (14) is arranged at the inlet end of the gas filter (23) to detect and obtain first pressure data; the second pressure sensor (15) is arranged at the outlet end of the gas filter (23) to detect and obtain second pressure data; and the first pressure data and the second pressure data are compared to detect changes in the flow resistance of the gas filter (23).

6. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a gas processing pipeline (18), a gas processing assembly (8) respectively arranged on the gas processing pipeline (18) and a third solenoid valve (19), wherein the third solenoid valve (19) is used to control the on-off of the gas processing pipeline (18); wherein the outlet of the main test pipeline (1), the outlet of the pre-test pipeline (3) and the outlet of the inspection pipeline (4) are respectively connectable and disconnectable to the gas processing pipeline (18), and the gas processing assembly (8) is used to safely process the gas in the main test pipeline (1), the pre-test pipeline (3) and the inspection pipeline (4).

7. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a first exhaust pipeline (20) and a second exhaust pipeline (21) which are respectively connected to the outlet of the main testing pipeline (1) in an on-off manner, wherein the first exhaust pipeline (20) is connected to the inlet of the gas filter (23) so that the gas analyzed by the gas analyzer (2) is filtered by the gas filter (23); and the second exhaust pipeline (21) is connected to the fuel cell stack (22) in the fuel cell system so that the gas analyzed by the gas analyzer (2) is used by the fuel cell stack (22).

8. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a purge assembly (5), the purge assembly (5) purges the main test pipeline (1) to purge and discharge the gas in the main test pipeline (1); the purge assembly (5) comprises a purge pipeline (51), a purge gas supply source (52) and a fourth solenoid valve (53) respectively arranged on the purge pipeline (51); the purge pipeline (51) is connected to the main test pipeline (1), the purge gas supply source (52) is used to provide purge gas, and the fourth solenoid valve (53) is used to control the on-off of the purge pipeline (51).

9. The fuel cell testing device according to claim 1, characterized in that: The fuel cell testing device further comprises a first solenoid valve (16) and a second solenoid valve (17); the first solenoid valve (16) is arranged on the pre-test pipeline (3) and is used to control the connection and disconnection between the pre-test pipeline (3) and the main test pipeline (1); the second solenoid valve (17) is arranged on the inspection pipeline (4) and is used to control the connection and disconnection between the inspection pipeline (4) and the main test pipeline (1).

10. A fuel cell system, characterized in that: A fuel cell testing device comprising the fuel cell testing device according to any one of claims 1 to 9; the fuel cell system further comprises a fuel cell stack (22), a gas filter (23), a cathode gas supply source (24), a first input pipeline (25), a first inlet valve (26) arranged on the first input pipeline (25), a second input pipeline (27), and a second inlet valve (28) arranged on the second input pipeline (27); the cathode gas supply source (24) is respectively connected to the first input pipeline (25) and the second input pipeline (27) for supplying gas to the cathode of the fuel cell stack (22); The first inlet valve (26) is used to control the on / off of the first input pipeline (25), and the second inlet valve (28) is used to control the on / off of the second input pipeline (27); wherein the first input pipeline (25) is respectively connected to the inlet of the gas filter (23) and the inlet of the pre-test pipeline (3); the second input pipeline (27) is connected to the cathode of the fuel cell stack (22); the outlet of the gas filter (23) is connected to the second input pipeline (27), so that the gas filtered by the gas filter (23) is used by the fuel cell stack (22).

11. The fuel cell system according to claim 10, characterized in that: The fuel cell system further comprises a first bypass branch (29), a second bypass branch (30), a gas-water separator (31), a humidifying tank (32), a fifth solenoid valve (33), a sixth solenoid valve (34) and a heating belt (35); the inlets of the first bypass branch (29) and the second bypass branch (30) are respectively connected to the outlet of the second input pipeline (27); the outlets of the first bypass branch (29) and the second bypass branch (30) are respectively connected to the cathode of the fuel cell stack (22); The solenoid valve (33) is arranged on the first bypass branch (29) and is used to control the on-off of the first bypass branch (29); the sixth solenoid valve (34) is arranged on the second bypass branch (30) and is used to control the on-off of the second bypass branch (30); the humidifying tank (32) is arranged on the second bypass branch (30) and is used to humidify the gas; the heating belt (35) is respectively wound on the first bypass branch (29) and the second bypass branch (30) and is used to heat the gas; The fuel cell testing device further comprises a gas processing pipeline (18) and a gas processing assembly (8) arranged on the gas processing pipeline (18); the inlet of the gas-water separator (31) is connected to the gas outlet of the fuel cell stack (22); the outlet of the gas-water separator (31) is connected to the inlet of the gas processing pipeline (18); and the gas processing assembly (8) is used to safely process the gas discharged from the outlet of the gas-water separator (31).

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