Testing device and testing method of humidifying film for fuel cell

Abstract

The invention relates to the field of research, development and production of hydrogen fuel cells, in particular to a testing device and a testing method of a humidifying membrane for a fuel cell. According to the testing device and the testing method, the data comparison of the humidifying performance of the humidifying films with different parameters under the specified testing pressure, temperature and flow in the research and development process can be tested to determine which group of data is good, so that the research and development direction is narrowed, and the testing device and the testing method are simple, efficient, convenient to operate and low in cost.

Description

Technical Field

[0001] The invention relates to the field of hydrogen fuel cell research and development and production, and in particular to a testing device and a testing method for a humidifying membrane for a fuel cell. Background Art

[0002] The hydrogen fuel cell humidifier is an important component in the hydrogen fuel cell system. Its main function is to humidify the gas entering the fuel cell to improve the performance and efficiency of the fuel cell. It mainly relies on the humidification hollow fiber membrane tube to effectively transfer water to the reaction gas. Therefore, the core function of the humidification membrane for fuel cells is humidification. At present, in the research and development and production, to determine the humidification performance of the humidification membrane, a humidifier needs to be made for testing, which has a long cycle and high production and testing costs. Summary of the invention

[0003] In order to solve the technical problem in the prior art that determining the humidification performance of the humidification membrane in research and development and production requires a long testing cycle of a humidifier and the high cost of manufacturing and testing, the present invention provides a testing device and a testing method for a humidification membrane for a fuel cell, the purpose of which is to ensure the humidification performance of the humidification membrane assembly in the production process, and to use a humidification membrane tube sample to form a test assembly, so as to test the humidification performance of the humidification membrane assembly itself under specified pressure, temperature and flow.

[0004] According to one aspect of the invention, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a test device for a humidification membrane for a fuel cell, comprising an air compressor, a first pressure reducing valve, a first flow controller, a digital mass flow meter, a first pressure transmitter, a first temperature transmitter, a first humidity transmitter, a second pressure transmitter, a second temperature transmitter, a second humidity transmitter, a second flow controller, a second pressure reducing valve, an electromagnetic steam engine, a third humidity transmitter and a humidification membrane assembly;

[0005] The humidifying membrane assembly includes first to fifth air pipes, first to second three-way pipes and a humidifying membrane tube, the first to third connecting ends of the first three-way pipe are respectively sealed and connected to the second end of the first air pipe, the second end of the second air pipe and the first end of the third air pipe, the first to third connecting ends of the second three-way pipe are respectively sealed and connected to the second end of the fourth air pipe, the second end of the third air pipe and the first end of the fifth air pipe; the humidifying membrane tube is arranged along the first end of the second air pipe to the second end of the fifth air pipe and is located inside the corresponding air pipe and the three-way pipe, the first end of the second air pipe and the second end of the fifth air pipe are sealed and fixed with the corresponding air pipe by using potting glue, the humidifying membrane tube is connected at the first end of the second air pipe and the second end of the fifth air pipe to form a dry side gas inlet and a dry side gas outlet respectively, the first end of the first three-way pipe and the first end of the second three-way pipe are respectively used as the wet side gas inlet and the wet side gas outlet, a wet gas channel is formed between the outer wall of the humidifying membrane tube and the inner wall of the air pipe and the three-way pipe passed through, and the internal pipeline of the humidifying membrane tube forms a dry gas channel;

[0006] The output end of the air compressor is connected to the dry side gas inlet, and a first pressure reducing valve and a first flow controller are arranged in sequence between the two. A digital mass flow meter, a first pressure transmitter, a first temperature transmitter and a first humidity transmitter are arranged between the first flow controller and the dry side gas inlet; the output end of the electromagnetic steam engine is connected to the wet side gas inlet, and a second pressure reducing valve and a second flow controller are arranged in sequence between the two. A second pressure transmitter, a second temperature transmitter and a second humidity transmitter are arranged between the second flow controller and the wet side gas inlet; the dry side gas outlet and the wet side gas outlet are respectively connected to a dry outlet pipeline and a wet outlet pipeline, and a third humidity transmitter is arranged on the dry outlet pipeline.

[0007] Preferably, the testing device for the humidifying membrane for a fuel cell of the present invention further comprises an air filter, and the output end of the air filter is connected to the input end of the air compressor.

[0008] Preferably, the testing device for the humidification membrane for the fuel cell of the present invention also includes a paperless recorder, which is electrically connected to the first pressure transmitter, the first temperature transmitter, the first humidity transmitter, the second pressure transmitter, the second temperature transmitter, the second humidity transmitter and the third humidity transmitter.

[0009] Preferably, in the test device for the humidifying membrane for a fuel cell of the present invention, the wet side gas inlet and the wet side gas outlet of the humidifying membrane assembly are manufactured in the following manner:

[0010] First, the first to second three-way pipes are fixedly connected with the first air pipe, the third air pipe, and the fourth air pipe respectively, and then the second air pipe to be cut and the fifth air pipe to be cut are fixedly connected to the first three-way pipe and the second three-way pipe respectively, and the first end of the second air pipe to be cut and the second end of the fifth air pipe to be cut are sealed and fixed with the corresponding air pipes respectively. After the potting glue is dried, the first end of the second air pipe to be cut and the second end of the fifth air pipe to be cut are cut respectively, so as to form the wet side air inlet and the wet side air outlet of the humidification membrane assembly.

[0011] Preferably, in the test device for a humidifying membrane for a fuel cell of the present invention, each humidifying membrane assembly comprises one or more humidifying membrane tubes.

[0012] According to another aspect of the present invention, the present invention also provides a test method for a humidifying membrane for a fuel cell, which is used in the above-mentioned test device, and the test method comprises the following process:

[0013] The air enters the air compressor for compression, then reduces the pressure to a specified pressure range through the pressure reducing valve, and then is controlled to a certain flow rate through the first flow controller and sent to the dry side gas inlet. The first pressure transmitter, the first temperature transmitter, and the first humidity transmitter collect data on the gas between the first flow controller and the dry side gas inlet, and send it to the processing device for data processing and analysis;

[0014] The electromagnetic steam engine evaporates water into gaseous state and discharges it. The steam is reduced to a specified pressure range through the second pressure reducing valve and then controlled by the second flow controller to be sent to the wet gas side gas inlet. The second pressure transmitter, the second temperature transmitter and the second humidity transmitter collect data on the gas between the second flow controller and the wet gas side gas inlet and send it to the processing device for data processing and analysis.

[0015] The moisture in the wet gas channel passes through the humidification membrane tube to humidify the gas in the dry gas channel;

[0016] The gas from the wet side gas outlet is directly discharged through the wet outlet pipeline;

[0017] The gas from the dry side gas outlet is discharged using a dry outlet pipeline, and a third humidity transmitter is used to collect the gas humidity at the dry side gas outlet and send it to a processing device for data processing and analysis.

[0018] Preferably, in the testing method of a humidifying membrane for a fuel cell of the present invention, the processing device is implemented by a paperless recorder.

[0019] Preferably, in a test method for a humidifying membrane for a fuel cell of the present invention, the air is processed by an air filter before entering the air compressor for compression to filter out impurities in the air.

[0020] The beneficial effect of using the present invention is that the present invention adopts a humidifying membrane component, and then uses the test device of the present invention to test, analyze the humidification performance of the humidifying membrane component, so as to obtain which data samples are better, and then conduct detailed tests to confirm whether its performance is qualified. The present invention can test the humidification performance of humidifying membranes with different parameters under specified test pressure, temperature, and flow rate during the research and development process to compare the data to determine which group of data is better, thereby narrowing the research and development direction. The test device and test method of the present invention are simple and efficient, easy to operate, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the humidification membrane assembly of the present invention;

[0022] Figure 2 It is a schematic diagram of a testing device for a humidifying membrane for a fuel cell according to the present invention.

[0023] Reference numerals include:

[0024] 1-air filter, 2-air compressor, 3-pressure reducing valve, 4-first flow controller, 5-first digital mass flowmeter, 6-first pressure transmitter, 7-first temperature transmitter, 8-first humidity transmitter, 9-first paperless recorder, 10-second paperless recorder, 11-second pressure transmitter, 12-second temperature transmitter, 13-second humidity transmitter, 14-second flow controller, 15-second pressure reducing valve, 16-second electromagnetic steam engine, 17-third paperless recorder, 18-third humidity transmitter, 19-humidification membrane assembly, 24-second air pipe, 25-potting glue, 26-first air pipe, 27-first three-way joint, 28-humidification membrane tube, 29-second air pipe, 30-fourth air pipe, 31-second three-way joint, 32-fifth air pipe, 33-potting glue. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0026] The purpose of the present invention is to compare the data of humidification performance of humidification membranes with different parameters under specified test pressure, temperature and flow rate during the research and development process to determine which set of data is better, thereby narrowing down the research and development direction.

[0027] refer to Figure 1 and Figure 2The test device for the humidification membrane for a fuel cell of this embodiment comprises an air filter 1, an air compressor 2, a first pressure reducing valve 3, a first flow controller 4, a digital mass flowmeter 5, a first pressure transmitter 6, a first temperature transmitter 7, a first humidity transmitter 8, a second pressure transmitter 11, a second temperature transmitter 12, a second humidity transmitter 12, a second flow controller 14, a second pressure reducing valve 15, an electromagnetic steam engine 16, a third humidity transmitter 18 and a humidification membrane assembly 19, and each air pipe and a three-way pipe are implemented by a circular pipe.

[0028] The humidifying membrane assembly 19 includes the first to fifth air pipes 26, 24, 29, 30, 32, the first to second three-way pipes 27, 31 and the humidifying membrane 28. The upper, left and right connecting ends of the first three-way pipe 27 are respectively sealed to connect the lower end of the first air pipe 26, the right end of the second air pipe 24, and the left end of the third air pipe 29. The upper, left and right connecting ends of the second three-way pipe 31 are respectively sealed to connect the lower end of the fourth air pipe 30, the right end of the third air pipe 24, and the left end of the fifth air pipe 32. The humidifying membrane tube 28 is arranged along the leftmost end of the second air pipe 24 to the rightmost end of the fifth air pipe 32 and is located inside the corresponding air pipes and three-way pipes. The leftmost end of the second air pipe 24 The rightmost end of the first and fifth air pipes is sealed and fixed with the corresponding second air pipe 24 and fifth air pipe 32 by potting glue 25 and 33. The humidifying membrane tube 28 is connected at the leftmost end of the second air pipe 24 and the rightmost end of the fifth air pipe to form a dry side gas inlet and a dry side gas outlet respectively. The upper end of the first three-way pipe 27 and the upper end of the second three-way pipe 31 are used as the wet side gas inlet and the wet side gas outlet respectively. The gap between the outer wall of the humidifying membrane tube 28 and the inner wall of the second air pipe 24, the third air pipe 29, the fifth air pipe 32, the first three-way pipe 27, and the second three-way pipe 31 formed a wet gas channel, and the internal pipeline of the humidifying membrane tube 28 formed a dry gas channel. Among them, the humidifying membrane tube 28 is 1, 2, 3, or more, which can be set according to the specific test needs. In this embodiment, it is preferably 20 to 30, but the present invention is not limited to this.

[0029] The output end of the air filter 1 is connected to the input end of the air compressor 2. The air filter 1 processes the air and filters impurities in the air, such as dust, water vapor, etc. The output end of the air compressor 2 is connected to the dry side gas inlet through the dry inlet pipeline 20, and the first pressure reducing valve 3 and the first flow controller 4 are arranged in sequence between the two. The first pressure reducing valve 3 and the first flow controller 4 can reduce the pressure of the dry gas transmitted by the air compressor 2, and the first flow controller 4 can control the flow through the dry inlet pipeline 20. The digital mass flow meter 5, the first pressure transmitter 6, the first temperature transmitter 7 and the first humidity transmitter 8 are arranged between the first flow controller 4 and the dry side gas inlet, and are respectively used to measure the mass flow, gas pressure and gas temperature flowing through the dry inlet pipeline 20. In this embodiment, the first pressure transmitter 6, the first temperature transmitter 7 and the first humidity transmitter 8 are respectively electrically connected to the first paperless recorder 9 for data graphic analysis and processing.

[0030] The output end of the electromagnetic steam engine 16 is connected to the wet side gas inlet through the wet inlet pipeline 21, and the second pressure reducing valve 15 and the second flow controller 14 are arranged in sequence between the two. The electromagnetic steam engine generates steam as wet gas. The second pressure reducing valve 15 and the second flow controller 14 can reduce the pressure of the wet gas transmitted by the electromagnetic steam engine 16, and the second flow controller 14 can control the flow through the wet inlet pipeline 21. The second pressure transmitter 11, the second temperature transmitter 12, and the second humidity transmitter 13 are arranged between the second flow controller 14 and the wet side gas inlet, and are used to measure the mass flow, gas pressure, and gas temperature flowing through the wet inlet pipeline 21 respectively; the dry side gas outlet and the wet side gas outlet are connected to the dry outlet pipeline 23 and the wet outlet pipeline 22 respectively, and the third humidity transmitter 18 is arranged on the dry outlet pipeline 23, and the third humidity transmitter 18 is used to measure the humidity of the dry gas in the dry outlet pipeline 23. In this embodiment, the second pressure transmitter 11, the second temperature transmitter 12, and the second humidity transmitter 13 are respectively electrically connected to the second paperless recorder 10 for data graphic analysis and processing, and the third humidity transmitter 18 is electrically connected to the third paperless recorder 16 for data graphic analysis and processing.

[0031] It should be understood that, in this embodiment, three paperless recorders are used for data graphic analysis and processing, but in other embodiments of the present invention, more or fewer paperless recorders may be used for analysis and processing.

[0032] The wet side gas inlet and wet side gas outlet of the humidifying membrane assembly 19 are manufactured in the following manner:

[0033] First, the first to second three-way pipes 27 and 31 are fixedly connected to the first air pipe 26, the third air pipe 29, and the fourth air pipe 30 respectively, and then the second air pipe to be cut and the fifth air pipe to be cut are fixedly connected to the first three-way pipe 27 and the second three-way pipe 31 respectively, and the left end of the second air pipe to be cut and the right end of the fifth air pipe to be cut are sealed and fixed with the corresponding second air pipe 24 and fifth air pipe 32 respectively. After the potting glue is dried, the left end of the second air pipe to be cut and the right end of the fifth air pipe to be cut are cut respectively. When cutting, it is preferably cut along the axial direction of the second air pipe 24 and the fifth air pipe 32, so as to form the wet side air inlet and the wet side air outlet of the humidification membrane assembly 19, wherein the second air pipe to be cut and the fifth air pipe to be cut form the second air pipe 24 and the fifth air pipe 32 in the present invention after cutting.

[0034] The test method for the humidifying membrane for a fuel cell provided by the present invention is used in the above-mentioned test device, and the test method comprises the following process:

[0035] Before the air enters the air compressor 2 for compression, it is also processed by the air filter 1 to filter out impurities in the air. Then the air enters the air compressor 2 for compression, and then the pressure is reduced to a specified pressure range of 60kpa~120kpa through the first pressure reducing valve 3, and then controlled to a certain flow rate of 8~12slpm through the first flow controller 4 and sent to the dry side gas inlet. The first pressure transmitter 6, the first temperature transmitter 7 and the first humidity transmitter 8 collect data on the gas between the first flow controller 4 and the dry side gas inlet, and send it to the first paperless recorder 9 for data graphic analysis and processing. Among them, the air filter 1 and the air compressor 2 are powered by 220V, the first flow controller 4, the digital mass flowmeter 5, the first pressure transmitter 6, the first temperature transmitter 7, the first humidity transmitter 8, and the first paperless recorder 9 are all powered by a 24V DC power supply, among which the first pressure transmitter 6 and the first humidity transmitter 8 transmit signals to the first paperless recorder 9 through the voltage signal line, and the first temperature transmitter 7 transmits signals to the first paperless recorder 9 through the current signal line.

[0036] The electromagnetic steam engine 16 evaporates water into gaseous state and discharges it. The steam is reduced to a specified pressure range of 60kpa to 120kpa through the second pressure reducing valve 15, and then the steam is sent to the second gas inlet on the wet side by controlling the flow rate to a certain flow rate of 8 to 12slpm through the second flow controller 14. The second pressure transmitter 11, the second temperature transmitter 12 and the second humidity transmitter 12 collect data on the gas between the second flow controller 14 and the wet side gas inlet, and send it to the first paperless recorder 10 for data graphic analysis and processing. Among them, the electromagnetic steam engine is powered by 220V / 380V, the second flow controller 14, the second pressure transmitter 11, the second temperature transmitter 12, the second humidity transmitter 13 and the second paperless recorder 10 are all powered by 24V DC power supply, and the second pressure transmitter 11 and the second temperature transmitter 12 transmit signals to the second paperless recorder 10 through the voltage signal line, and the second temperature transmitter 12 transmits signals to the second paperless recorder 10 through the current signal line.

[0037] At this time, dry gas flows through the dry gas channel and wet gas flows through the wet gas channel. Since the humidification membrane is water-permeable but not air-permeable, the moisture in the humidification wet gas channel passes through the humidification membrane tube to humidify the gas in the dry gas channel.

[0038] The gas outlet at the wet side gas outlet is directly discharged through the wet outlet pipeline 22 .

[0039] The dry side gas outlet is discharged using the dry outlet pipeline 23, and the third humidity transmitter 18 is used to collect the gas humidity of the dry outlet, and sent to the third paperless recorder 17 for data graphic analysis and processing. The third humidity transmitter 18 and the third paperless recorder 17 are both powered by a 24V DC power supply, and the third humidity transmitter 18 transmits the signal to the third paperless recorder 17 through the voltage signal line.

[0040] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A test device for a humidifying membrane for a fuel cell, characterized in that: It includes an air compressor, a first pressure reducing valve, a first flow controller, a digital mass flow meter, a first pressure transmitter, a first temperature transmitter, a first humidity transmitter, a second pressure transmitter, a second temperature transmitter, a second humidity transmitter, a second flow controller, a second pressure reducing valve, an electromagnetic steam engine, a third humidity transmitter and a humidifying membrane assembly; The humidifying membrane assembly includes first to fifth air pipes, first to second three-way pipes and a humidifying membrane tube, the first to third connecting ends of the first three-way pipe are respectively sealed and connected to the second end of the first air pipe, the second end of the second air pipe and the first end of the third air pipe, the first to third connecting ends of the second three-way pipe are respectively sealed and connected to the second end of the fourth air pipe, the second end of the third air pipe and the first end of the fifth air pipe; the humidifying membrane tube is arranged along the first end of the second air pipe to the second end of the fifth air pipe and is located inside the corresponding air pipe and the three-way pipe, the first end of the second air pipe and the second end of the fifth air pipe are sealed and fixed with the corresponding air pipe by using potting glue, the humidifying membrane tube is connected at the first end of the second air pipe and the second end of the fifth air pipe to form a dry side gas inlet and a dry side gas outlet respectively, the first end of the first three-way pipe and the first end of the second three-way pipe are respectively used as the wet side gas inlet and the wet side gas outlet, a wet gas channel is formed between the outer wall of the humidifying membrane tube and the inner wall of the air pipe and the three-way pipe passed through, and the internal pipeline of the humidifying membrane tube forms a dry gas channel; The output end of the air compressor is connected to the dry side gas inlet, and a first pressure reducing valve and a first flow controller are arranged in sequence between the two. A digital mass flow meter, a first pressure transmitter, a first temperature transmitter and a first humidity transmitter are arranged between the first flow controller and the dry side gas inlet; the output end of the electromagnetic steam engine is connected to the wet side gas inlet, and a second pressure reducing valve and a second flow controller are arranged in sequence between the two. A second pressure transmitter, a second temperature transmitter and a second humidity transmitter are arranged between the second flow controller and the wet side gas inlet; the dry side gas outlet and the wet side gas outlet are respectively connected to a dry outlet pipeline and a wet outlet pipeline, and a third humidity transmitter is arranged on the dry outlet pipeline.

2. A test device for a humidifying membrane for a fuel cell according to claim 1, characterized in that: It also includes an air filter, the output end of the air filter is connected to the input end of the air compressor.

3. A test device for a humidifying membrane for a fuel cell according to claim 1, characterized in that: It also includes a paperless recorder, which is electrically connected to the first pressure transmitter, the first temperature transmitter, the first humidity transmitter, the second pressure transmitter, the second temperature transmitter, the second humidity transmitter and the third humidity transmitter.

4. A test device for a humidifying membrane for a fuel cell according to claim 1, characterized in that: The wet side gas inlet and wet side gas outlet of the humidification membrane module are manufactured in the following way: First, the first to second three-way pipes are fixedly connected with the first air pipe, the third air pipe, and the fourth air pipe respectively, and then the second air pipe to be cut and the fifth air pipe to be cut are fixedly connected to the first three-way pipe and the second three-way pipe respectively, and the first end of the second air pipe to be cut and the second end of the fifth air pipe to be cut are sealed and fixed with the corresponding air pipes respectively. After the potting glue is dried, the first end of the second air pipe to be cut and the second end of the fifth air pipe to be cut are cut respectively, so as to form the wet side air inlet and the wet side air outlet of the humidification membrane assembly.

5. A test device for a humidifying membrane for a fuel cell according to claim 1, characterized in that: Each humidification membrane assembly includes one or more humidification membrane tubes.

6. A method for testing a humidifying membrane for a fuel cell, used in a testing device as claimed in any one of claims 1 to 5, characterized in that: The test method includes the following process: The air enters the air compressor for compression, then reduces the pressure to a specified pressure range through the first pressure reducing valve, and then is controlled to a certain flow rate through the first flow controller and sent to the dry side gas inlet. The first pressure transmitter, the first temperature transmitter, and the first humidity transmitter collect data on the gas between the first flow controller and the dry side gas inlet, and send the data to the processing device for data processing and analysis. The electromagnetic steam engine evaporates water into gaseous state and discharges it. The steam is reduced to a specified pressure range through the second pressure reducing valve, and then controlled to a certain flow rate by the second flow controller and sent to the wet gas side gas inlet. The second pressure transmitter, the second temperature transmitter and the second humidity transmitter collect data on the gas between the second flow controller and the wet gas side gas inlet, and send it to the processing device for data processing and analysis. The moisture in the wet gas channel passes through the humidification membrane tube to humidify the gas in the dry gas channel; The gas from the wet side gas outlet is directly discharged through the wet outlet pipeline; The gas from the dry side gas outlet is discharged using a dry outlet pipeline, and a third humidity transmitter is used to collect the gas humidity at the dry side gas outlet and send it to a processing device for data processing and analysis.

7. A method for testing a humidifying membrane for a fuel cell according to claim 6, characterized in that: The processing device is implemented by a paperless recorder.

8. The method for testing a humidifying membrane for a fuel cell according to claim 6, characterized in that: Before the air enters the air compressor for compression, it is processed by an air filter to filter out impurities in the air.

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