Simulation test system for working condition of air-cooled stack of hydrogen fuel cell

Abstract

The utility model relates to a hydrogen fuel cell air cooling electric pile working condition simulation test system, which comprises an air compressor, a plurality of air modulation branches, a mixed gas cylinder and an electric pile to be tested, the air compressor is respectively connected with the air inlet end of each air modulation branch, the air outlet end of each air modulation branch is connected with the mixed gas cylinder, and the mixed gas cylinder is connected with the electric pile to be tested. And the mixed gas cylinder is connected with the galvanic pile to be tested. The air conditioning system has the advantages that a plurality of air conditioning branches are arranged, dry air, wet air, hot air and cold air can be obtained and stored, and then the dry air, the wet air, the hot air and the cold air in different proportions are mixed through the mixed air bottle, so that air with different temperatures and humidity can be obtained; pistons are arranged on the gas cylinder and the mixed gas cylinder, the gas pressure in the gas cylinder and the mixed gas cylinder can be adjusted by controlling the pistons, and the situation that gas output stability is affected by gas pressure changes is avoided.

Description

Technical Field

[0001] The utility model relates to the field of fuel cell detection, in particular to a hydrogen fuel cell air-cooled stack operating condition simulation test system. Background Art

[0002] In hydrogen fuel cells, the air-cooled stack system is relatively simple and the cathode is usually in open mode, but different operating conditions have a great impact on the performance and life of the stack, so the stack solution needs to be adjusted according to different usage environments, which requires a series of environmental simulation tests and comparisons, such as extreme cold, heat, dryness, humidity, etc. However, it is usually difficult for laboratories to provide low-cost air input with controllable temperature and humidity for the stack. Summary of the invention

[0003] The utility model mainly solves the above-mentioned problems and provides a hydrogen fuel cell air-cooled stack operating condition simulation test system, which can provide humidity and temperature controllable air input for the stack according to demand.

[0004] The technical solution adopted by the utility model to solve its technical problems is a hydrogen fuel cell air-cooled stack working condition simulation test system, including an air compressor, a plurality of air modulation branches, a mixed gas cylinder and a stack to be tested, the air compressor is respectively connected to the air inlet end of each air modulation branch, the air outlet end of each air modulation branch is connected to the mixed gas cylinder, and the mixed gas cylinder is connected to the stack to be tested.

[0005] As a preferred embodiment of the above scheme, a diverter valve is provided between the air compressor and the air modulation branch.

[0006] As a preferred embodiment of the above scheme, the air modulation branch includes a modulator, a gas cylinder and a control valve connected in sequence from the air inlet end to the air outlet end, and the modulators are a dryer, a humidifier, a heater and a cooler respectively.

[0007] As a preferred embodiment of the above scheme, the gas cylinder has the same structure as the mixed gas cylinder, including a cylinder and a piston slidably disposed in the cylinder and sealed with the side wall of the cylinder, and an air inlet and an air outlet are provided on the bottom surface of the cylinder.

[0008] As a preferred embodiment of the above scheme, both the air inlet and the air outlet are provided with a one-way valve.

[0009] As a preferred embodiment of the above scheme, the gas cylinder and the gas storage cylinder are both provided with a temperature sensor, a humidity sensor and an air pressure sensor.

[0010] As a preferred embodiment of the above scheme, a proportional valve and a flow sensor are provided between the mixed gas cylinder and the fuel cell stack to be tested.

[0011] As a preferred embodiment of the above scheme, the piston is fixed to the piston rod of the cylinder.

[0012] The advantages of the utility model are: a plurality of air modulation branches are provided, dry air, humid air, hot air and cold air can be obtained and stored, and then different proportions of dry air, humid air, hot air and cold air can be mixed through a mixing gas cylinder to obtain air with different temperatures and humidities; pistons are provided on the gas cylinders and the mixing gas cylinders, and the air pressure in the gas cylinders and the mixing gas cylinders can be adjusted by controlling the pistons, so as to avoid affecting the stability of gas output due to changes in air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the structural frame of the hydrogen fuel cell air-cooled stack operating condition simulation test system.

[0014] 1- air compressor 2- diverter valve 3- dryer 4- humidifier 5- heater 6- cooler 7- gas cylinder 8- piston 9- control valve 10- mixed gas cylinder 11- flow sensor 12- fuel cell to be tested. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described below through embodiments and in conjunction with the accompanying drawings.

[0016] Example:

[0017] This embodiment provides a hydrogen fuel cell air-cooled stack operating condition simulation test system, such as Figure 1 As shown, it includes an air compressor 1, several air modulation branches, a mixed gas cylinder 10 and a test stack 12. The air compressor 1 is connected to the air inlet end of each air modulation branch through a diverter valve 2, and the air outlet end of each air modulation branch is connected to the mixed gas cylinder 10. The mixed gas cylinder 10 is connected to the test stack 12. A proportional valve and a flow sensor 11 are arranged between the mixed gas cylinder 10 and the test stack 12. When the mixed gas cylinder is connected to the test stack, the output pipeline of the mixed gas cylinder is connected to the air inlet surface of the test stack and sealed.

[0018] The air modulation branch includes a modulator, a gas cylinder 7 and a control valve 9 connected in sequence from the air inlet end to the air outlet end. The modulators are a dryer 3, a humidifier 4, a heater 5 and a cooler 6. The four air modulation branches generate and store dry air, humid air, hot air and cold air. In this embodiment, a steam-water separator is provided in the hot air modulation branch and the cold air modulation branch, and an insulation layer is provided on the outside of the gas cylinder 7; a desiccant is provided in the gas cylinder of the dry air modulation branch.

[0019] The gas cylinder 7 and the mixed gas cylinder 10 have the same structure, both of which include a cylinder and a piston 8 which is slidably arranged in the cylinder and sealed with the side wall of the cylinder. The piston is fixed to the piston rod of the cylinder. The position of the piston in the cylinder can be controlled by controlling the cylinder to control the gas pressure in the gas cylinder and the mixed gas cylinder. An air inlet and an air outlet are provided on the bottom surface of the cylinder, and a one-way valve is provided in the air inlet and the air outlet. In addition, in this embodiment, a temperature sensor, a humidity sensor and an air pressure sensor are provided in the gas cylinder and the gas storage bottle.

[0020] When the test stack 12 is simulated, air is filled into the gas cylinder by an air compressor. In the process of air entering the gas cylinder, each modulator modulates the air accordingly. At the same time, as the gas is filled, the air pressure in the gas cylinder increases, and the piston rod in the gas cylinder is lifted up, so as to ensure that the air pressure in each gas cylinder is balanced, providing a basis for the subsequent gas supply to the mixed gas cylinder. After the filling is completed, the temperature, humidity and air pressure parameters of the gas in each gas cylinder can be obtained through the sensors in each gas cylinder. Then the control valve 9 is opened, and the gas in each gas cylinder is transported to the mixed gas cylinder in the required proportion by pressing down the piston rod to mix to obtain a mixed gas with a specific temperature and humidity. Finally, the mixed gas is stably transported to the cathode of the test stack through the piston rod in the mixed gas cylinder to perform a working condition simulation test. In addition, by controlling the piston rod, the air pressure in the mixed gas cylinder can also be changed to test the working condition of the test stack under low pressure or high pressure environment.

[0021] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A hydrogen fuel cell air-cooled stack operating condition simulation test system, characterized by: It includes an air compressor, several air modulation branches, a mixed gas bottle and a fuel cell stack to be tested. The air compressor is respectively connected to the air inlet end of each air modulation branch, the air outlet end of each air modulation branch is connected to the mixed gas bottle, and the mixed gas bottle is connected to the fuel cell stack to be tested.

2. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 1 is characterized by: A diverter valve is provided between the air compressor and the air modulation branch.

3. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 1 is characterized by: The air modulation branch includes a modulator, a gas cylinder and a control valve connected in sequence from the air inlet end to the air outlet end, and the modulators are a dryer, a humidifier, a heater and a cooler respectively.

4. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 3 is characterized by: The gas cylinder has the same structure as the mixed gas cylinder, comprising a cylinder and a piston slidably arranged in the cylinder and sealed with the side wall of the cylinder. The bottom surface of the cylinder is provided with an air inlet and an air outlet.

5. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 4 is characterized in that: One-way valves are provided in the air inlet and the air outlet.

6. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 4 is characterized by: The gas cylinder and the gas storage cylinder are both provided with a temperature sensor, a humidity sensor and an air pressure sensor.

7. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 1 is characterized by: A proportional valve and a flow sensor are provided between the mixed gas bottle and the battery stack to be tested.

8. The hydrogen fuel cell air-cooled stack operating condition simulation test system according to claim 4 is characterized by: The piston is fixed to the piston rod of the cylinder.

Images