Chloride ion resistance testing device for fuel cell stack

Abstract

The invention discloses a fuel cell stack chloride ion resistance testing device which is characterized in that the testing device comprises a salt mist storage tank (1), the salt mist storage tank (1) is communicated with a mixing storage tank (3) through a main liquid inlet pipe (2), and a temperature sensor (4) and an atomization supply pump (5) are arranged on the main liquid inlet pipe (2); meanwhile, an atomization generator (6) located in the salt mist storage tank (1) is further arranged at the tail end of the main liquid inlet pipe (2), the mixing storage tank (3) is connected with a pure water storage tank (8) through a pure water pipeline (7), a water pump (9), an electromagnetic valve (10) and a flow meter (11) are arranged on the pure water pipeline (7), and the mixing storage tank (3) is further connected with a saline water storage tank (13) through a saline water pipeline (12). And a brine pump (14), an electromagnetic valve (10) and a fluid flowmeter (11) are arranged on the brine pipeline (12).

Description

Technical Field

[0001] The present invention relates to the field of new energy, and in particular to a fuel cell stack chloride ion resistance testing device. Background Art

[0002] A hydrogen fuel cell is a device that can convert the chemical energy in hydrogen into electrical energy. Since its product is water, it does not pollute the environment and has been widely used in the fields of automobiles and ships. When hydrogen fuel cell vehicles are operating in coastal environments, or when hydrogen fuel cell ships are sailing, they often need to face high salt fog air. When hydrogen fuel cells are working, they need to inhale the air in the environment into the fuel cell stack. However, the high content of chloride ions in this air will have an adverse effect on the metal bipolar plates and membrane electrodes of the fuel cell. For this reason, before the fuel cell stack is operated in a coastal environment or a high salt fog environment, it is necessary to evaluate the impact of salt fog with different chloride ion concentrations on the performance of the stack, and then evaluate the stack's tolerance to chloride ions. However, the current fuel cell related test equipment cannot meet the above requirements.

[0003] Chinese patent CN116908717A discloses a fuel cell testing device and control method for simulating high-salt fog atmosphere in the ocean. Salt fog is generated by an ultrasonic atomization module and is diverted through air to a salt fog / air mixer to mix with air, thereby simulating high-salt fog atmosphere in the ocean. However, the above scheme cannot adjust the concentration of chloride ions in the salt fog in real time. At the same time, in test scenarios such as single-cell fuel cell testing, low-electrical-density testing, or low-voltage testing, its air diversion function is difficult to achieve. Although it can be coordinated through a back-end three-way valve, the entire control process is complicated and needs to take into account both pressure and flow, resulting in poor control stability.

[0004] Therefore, there is an urgent need for a fuel cell stack chloride ion resistance testing device that can simulate salt spray air with different chloride ion contents online and adapt to test scenarios such as different air intake flow rates and pressures. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned deficiencies in the prior art and proposes a fuel cell stack chloride ion resistance testing device with a simple structure, ingenious design, and reasonable layout, which can simulate air with a variety of different chloride ion contents online to achieve accurate and efficient testing.

[0006] The technical solution of the present invention is: a fuel cell stack chloride ion resistance test device, characterized in that: the test device includes a salt spray tank 1, the salt spray tank 1 is connected to a mixing tank 3 through a main liquid inlet pipe 2, a temperature sensor 4 and an atomization supply pump 5 are provided on the main liquid inlet pipe 2, and an atomization generator 6 located in the salt spray tank 1 is also provided at the end of the main liquid inlet pipe 2. The mixing tank 3 is connected to the pure water tank 8 via a pure water pipeline 7, on which a water pump 9, a solenoid valve 10 and a flow meter 11 are provided. The mixing tank 3 is also connected to the brine tank 13 via a brine pipeline 12, on which a brine pump 14, a solenoid valve 10 and a liquid flow meter 11 are provided. The bottom of the salt spray storage tank 1 is provided with a drain pipe 15, and the drain pipe 15 is provided with a drain valve 16. The salt spray storage tank 1 is also connected to the gas source through an air inlet pipe 17, and a pressure regulating valve 18 is provided on the air inlet pipe 17. The salt spray storage tank 1 is also connected to the air inlet of the fuel cell stack 20 through an outlet pipe 1. A solenoid valve 10 and a gas flow meter 21 are provided on the outlet pipe 19. The hydrogen inlet of the fuel cell stack 20 is connected to the hydrogen cylinder 23 through a hydrogen pipeline 22 , and a pressure regulating valve 18 is provided on the hydrogen pipeline 22 .

[0007] The air source is an air storage tank 24 .

[0008] The main liquid inlet pipe 2 and the gas outlet pipeline 19 are both provided with a temperature sensor 4 , and the salt spray storage tank 1 , the gas outlet pipeline 19 and the hydrogen pipeline 22 are both provided with a pressure sensor 25 .

[0009] The atomization generator 6 is an ultrasonic atomizer or a pressure-type mechanical atomizer.

[0010] The salt spray storage tank 1 is provided with an electric heating device and a stirring device.

[0011] Compared with the prior art, the present invention has the following advantages: This fuel cell stack chloride ion resistance test device has a simple structure, ingenious design, and reasonable layout. It addresses the problems of traditional fuel cell test devices in salt spray environments by designing a special structure. It uses a pure water storage tank and a salt water storage tank to provide pure water and high-concentration salt water. The pure water and salt water are then mixed by supplying a mixing tank, thereby enabling online adjustment of salt water of varying concentrations. This allows for testing the effects of multiple salt spray concentrations on fuel cell stack performance in a single operation, effectively shortening the test cycle and improving experimental efficiency. Furthermore, its air source is a high-pressure air storage tank. The high-pressure air enters the salt spray storage tank after passing through a pressure regulating valve. After fully mixing with the salt spray, it simulates the chloride ion-rich air found in coastal or offshore environments before being supplied to the fuel cell stack under test. The entire process is driven by air pressure and can be adapted to fuel cell stacks of varying sizes and specifications, demonstrating strong adaptability. Furthermore, this test device has a simple manufacturing process and low manufacturing cost. Therefore, it possesses multiple advantages, making it particularly suitable for promotion and application in this field, and its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a system composition block diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 The figure shows a fuel cell stack chloride ion resistance test device, characterized in that: the test device includes a salt spray tank 1, which is connected to a mixing tank 3 through a main liquid inlet pipe 2, and a temperature sensor 4 and an atomization supply pump 5 are provided on the main liquid inlet pipe 2. At the same time, an atomization generator 6 located in the salt spray tank 1 is also provided at the end of the main liquid inlet pipe 2. The mixing tank 3 is connected to the pure water tank 8 via a pure water pipeline 7, on which a water pump 9, a solenoid valve 10 and a flow meter 11 are provided. The mixing tank 3 is also connected to the brine tank 13 via a brine pipeline 12, on which a brine pump 14, a solenoid valve 10 and a liquid flow meter 11 are provided. The bottom of the salt spray storage tank 1 is provided with a drain pipe 15, and the drain pipe 15 is provided with a drain valve 16. The salt spray storage tank 1 is also connected to the gas source through an air inlet pipe 17, and a pressure regulating valve 18 is provided on the air inlet pipe 17. The salt spray storage tank 1 is also connected to the air inlet of the fuel cell stack 20 through an outlet pipe 1. A solenoid valve 10 and a gas flow meter 21 are provided on the outlet pipe 19. The hydrogen inlet of the fuel cell stack 20 is connected to the hydrogen cylinder 23 through a hydrogen pipeline 22 , and a pressure regulating valve 18 is provided on the hydrogen pipeline 22 .

[0014] The air source is an air storage tank 24 .

[0015] The main liquid inlet pipe 2 and the gas outlet pipeline 19 are both provided with a temperature sensor 4 , and the salt spray storage tank 1 , the gas outlet pipeline 19 and the hydrogen pipeline 22 are both provided with a pressure sensor 25 .

[0016] The atomization generator 6 is an ultrasonic atomizer or a pressure-type mechanical atomizer.

[0017] The salt spray storage tank 1 is provided with an electric heating device and a stirring device.

[0018] The working process of the fuel cell stack chloride ion resistance testing device of the embodiment of the present invention is as follows: when the fuel cell stack 20 needs to be tested for chloride ion resistance, a signal is sent to the water pump 9 and the brine pump 14 through the control system, which respectively extract pure water from the pure water storage tank 8 and extract concentrated brine from the brine storage tank 13, and input them into the mixing tank 3 for thorough mixing. The amount of pure water and brine can be controlled by the opening / closing time of the solenoid valve 10 provided on the pure water pipeline 7 and the brine pipeline 12, and the flow meter 11 can feed back the amount of water flowing through the two pipelines to the control system. In this way, brine of the required concentration can be prepared in the mixing tank 3, and the electric heating device and stirring device provided in the mixing tank 3 can quickly mix the pure water and brine; After the brine of the required concentration is prepared, the atomizing supply pump 5 starts working to extract the brine from the mixing tank 3 and pump it to the atomizing generator 6, which changes the brine from liquid to water mist. At the same time, the pressure regulating valve 18 is opened under the control of the control system, and the air in the air source enters the salt spray tank 1 through the air inlet pipe 17. The high-pressure air will bring the water mist rich in chloride ions produced by the atomizing generator 6 into the air outlet pipe 19, and finally input it into the air inlet of the fuel cell stack 20. At the same time, hydrogen will also enter the fuel cell stack 20 through the hydrogen pipe 22, thereby simulating the scene when the fuel cell stack 20 is working in a seaside or marine environment; During the above process, the temperature sensor 4 will detect the temperature of the medium in the main liquid inlet pipe 2 and the gas outlet pipe 19 in real time, while the pressure sensor 25 can detect the air pressure in the salt spray storage tank 1, the gas outlet pipe 19 and the hydrogen pipe 22. The above data will be summarized in the control system, that is, the control system will monitor the temperature and pressure values at various locations during the operation of the device.

[0019] After the work is completed, open the drain valve 16 to drain the liquid remaining in the salt spray storage tank 1.

Claims

1. A fuel cell stack chloride ion resistance testing device, characterized by: The test device comprises a salt spray tank (1), which is connected to a mixing tank (3) via a main liquid inlet pipe (2). A temperature sensor (4) and an atomization supply pump (5) are provided on the main liquid inlet pipe (2). An atomization generator (6) located in the salt spray tank (1) is also provided at the end of the main liquid inlet pipe (2). The mixing storage tank (3) is connected to the pure water storage tank (8) via a pure water pipeline (7), on which a water pump (9), a solenoid valve (10) and a flow meter (11) are provided. The mixing storage tank (3) is also connected to the brine storage tank (13) via a brine pipeline (12), on which a brine pump (14), a solenoid valve (10) and a liquid flow meter (11) are provided. A drainage pipeline (15) is provided at the bottom of the salt spray storage tank (1), and a drainage valve (16) is provided on the drainage pipeline (15). The salt spray storage tank (1) is also connected to an air source via an air inlet pipe (17), and a pressure regulating valve (18) is provided on the air inlet pipe (17). The salt spray storage tank (1) is also connected to the air inlet of the fuel cell stack (20) via an air outlet pipeline (19), and a solenoid valve (10) and a gas flow meter (21) are provided on the air outlet pipeline (19). The hydrogen inlet of the fuel cell stack (20) is connected to the hydrogen cylinder (23) via a hydrogen pipeline (22), and a pressure regulating valve (18) is provided on the hydrogen pipeline (22).

2. The fuel cell stack chloride ion resistance testing device according to claim 1, characterized in that: The gas source is an air storage tank (24).

3. The fuel cell stack chloride ion resistance testing device according to claim 1, characterized in that: The main liquid inlet pipe (2) and the gas outlet pipe (19) are both provided with a temperature sensor (4), and the salt spray storage tank (1), the gas outlet pipe (19) and the hydrogen pipe (22) are both provided with a pressure sensor (25).

4. The fuel cell stack chloride ion resistance testing device according to claim 1, characterized in that: The atomization generator (6) is an ultrasonic atomizer or a pressure-type mechanical atomizer.

5. The fuel cell stack chloride ion resistance testing device according to claim 1, characterized in that: The salt spray storage tank (1) is provided with an electric heating device and a stirring device.

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