Hydrogen circulating pump cold start drainage calibration system and calibration method

Abstract

The invention relates to the technical field of fuel cells, in particular to a hydrogen circulating pump cold start drainage calibration system and method, the hydrogen circulating pump cold start drainage calibration system comprises an air compressor, the air supply pressure of the air compressor can be set; the water supply amount of the water supply device can be set according to the anode water amount of the electric pile dense point corresponding to the fuel cell; the mixer is communicated with the air compressor and the water supply device; the environment simulation device is provided with a hollow cavity, the temperature and humidity of the environment simulation device can be adjusted, a hydrogen circulating pump is arranged in the hollow cavity, an outlet of the mixer is communicated with an inlet of the hydrogen circulating pump, a drain valve is integrated at the outlet of the hydrogen circulating pump, and an opening of the drain valve is vertically arranged downwards; and the water quantity measuring device is arranged right below the drain valve. According to the invention, the hydrogen circulating pump can be smoothly started in a cold environment.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells, and in particular to a cold start drainage calibration system and a calibration method for a hydrogen circulation pump. Background Art

[0002] During the operation of the fuel cell on a hydrogen fuel cell vehicle, the anode of the fuel cell corresponding to the stack density point will produce a certain amount of water, and the amount of water produced by the anode of the fuel cell corresponding to different stack density points is determined. Some of the gas containing water will be discharged through the drain valve of the hydrogen circulation pump, but at the same time some water will accumulate in the hydrogen circulation pump. In the cold winter, low-temperature starting is a very important performance of fuel cell vehicles. After the car has been parked in a damp and cold environment for a period of time, some water will accumulate in the hydrogen circulation pump, causing the hydrogen circulation pump to freeze and be unable to start. When the problem occurs, the entire vehicle will not be able to start, resulting in system failure and even the need for repairs, resulting in a very poor customer experience.

[0003] Therefore, a hydrogen circulation pump cold start drainage calibration system and calibration method are needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a hydrogen circulation pump cold start drainage calibration system and calibration method, which can ensure the smooth start of the hydrogen circulation pump in a cold environment, thereby improving the driving experience.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Hydrogen circulation pump cold start drainage calibration system, including:

[0007] An air compressor, the air supply pressure of which can be set;

[0008] A water supply device, wherein the water supply amount of the water supply device can be set according to the anode water amount of the fuel cell corresponding to the electric density point of the fuel cell stack;

[0009] A mixer, the mixer being in communication with the air compressor and the water supply device;

[0010] An environmental simulation device, comprising a hollow cavity, wherein the temperature and humidity of the environmental simulation device can be adjusted, wherein a hydrogen circulation pump is arranged in the hollow cavity, wherein the outlet of the mixer is connected to the inlet of the hydrogen circulation pump, wherein a drain valve is integrated at the outlet of the hydrogen circulation pump, and wherein the opening of the drain valve is arranged vertically downward;

[0011] A water volume measuring device is arranged below the drain valve and is used to collect and measure the amount of water discharged through the drain valve.

[0012] Furthermore, it also includes a power supply and a controller, the power supply is electrically connected to the controller, and the controller is electrically connected to the hydrogen circulation pump, the air compressor and the water supply device.

[0013] Furthermore, the environment simulation device is provided with a temperature sensor and a humidity sensor, and both the temperature sensor and the humidity sensor are electrically connected to the controller.

[0014] Furthermore, a display is integrated on the controller, and the display is used to display the temperature of the environment simulation device collected by the temperature sensor and the humidity of the environment simulation device collected by the humidity sensor.

[0015] Furthermore, a humidifier and a temperature regulator are fixedly arranged in the hollow cavity of the environment simulation device, and both the humidifier and the temperature regulator are electrically connected to the controller.

[0016] Furthermore, a rotation speed sensor is provided on the hydrogen circulation pump, the rotation speed sensor is electrically connected to the controller, and the rotation speed sensor is used to detect the rotation speed of the hydrogen circulation pump.

[0017] Furthermore, it also includes a timer, which is electrically connected to the controller.

[0018] Furthermore, the air compressor is provided with a pressure relief valve, and the pressure relief valve is communicated with a pressure relief port of the air compressor.

[0019] Furthermore, a first switch valve is provided at the exhaust port of the air compressor, and a second switch valve is provided at the water outlet of the water supply device.

[0020] The calibration method uses the hydrogen circulation pump cold start drainage calibration system as described above to calibrate the start of the hydrogen circulation pump, comprising the following steps:

[0021] S1. Place the hydrogen circulation pump in an environmental simulation device, and place a water volume measuring device below the drain valve of the hydrogen circulation pump;

[0022] S2, setting the temperature and humidity of the environmental simulation device, and freezing the hydrogen circulation pump to a preset temperature in the environmental simulation device;

[0023] S3, setting the air supply pressure of the air compressor, and setting the water supply amount of the water supply device according to the anode water amount of the fuel cell corresponding to the electric density point of the stack;

[0024] S4, turning on the air compressor, the water supply device and the hydrogen circulation pump, and opening the drain valve at a set frequency;

[0025] S5, after the hydrogen circulation pump has worked for a first set time, the hydrogen circulation pump and the water supply device are turned off, and the gas supply is continued for a second set time for purging;

[0026] S6, the drain valve is powered off and stops working, and the air compressor is turned off;

[0027] S7, the hydrogen circulation pump is frozen in the environmental simulation device for a third set time;

[0028] S8. Open the drain valve and the air compressor, and start the hydrogen circulation pump at the set speed. If it is successfully started, the drainage volume of the hydrogen circulation pump, the second set time, the speed of the hydrogen circulation pump and the set frequency of the switch valve are recorded.

[0029] Beneficial effects of the present invention:

[0030] The present invention provides a hydrogen circulation pump cold start drainage calibration system, wherein the air blown out by the air compressor at a certain pressure and the water supplied by the water supply device are mixed in the mixer and then enter the hydrogen circulation pump located in the environmental simulation device, and the temperature and humidity of the environmental simulation device can be adjusted, and the water is discharged from the drainage valve to the water quantity measuring device during the operation of the hydrogen circulation pump. During the calibration process, the environmental simulation device is first adjusted according to the humidity and temperature of the environment corresponding to the calibration, so as to simulate the state of the hydrogen circulation pump in the external environment, and the water supply corresponding to the electric density point of the fuel cell stack is set according to the anode water volume of the fuel cell by setting the air pressure, so as to simulate the gas state of the hydrogen circulation pump during the operation process, and the water quantity measuring device is used to collect and measure the water quantity discharged through the drainage valve, so as to determine the discharged water quantity, thereby determining the residual water quantity in the hydrogen circulation pump, and by controlling the opening of the hydrogen circulation pump, the air compressor and the drainage valve, the residual water quantity in the hydrogen circulation pump can be reduced, so as to start the hydrogen circulation pump in the environmental simulation device. Through the above method, the conditions for starting the hydrogen circulation pump under the corresponding ambient temperature and humidity can be tested, so that in the actual environment, in a cold environment, the hydrogen circulation pump can be started smoothly, thereby improving the driving experience.

[0031] A calibration method provided by the present invention uses the hydrogen circulation pump cold start drainage calibration system as described above to calibrate the start of the hydrogen circulation pump, which can ensure the smooth start of the hydrogen circulation pump in a cold environment, thereby improving the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a cold start drainage calibration system for a hydrogen circulation pump of the present invention;

[0033] Figure 2 It is a flow chart of a calibration method of the present invention.

[0034] In the figure:

[0035] 1. Air compressor; 2. Water supply device; 3. Mixer; 4. Environmental simulation device; 41. Humidifier; 42. Temperature regulator; 43. Temperature sensor; 44. Humidity sensor; 5. Hydrogen circulation pump; 51. Drain valve; 6. Water quantity measuring device; 7. Power supply; 71. Controller; 711. Display. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] During the driving of fuel cell vehicles, in order to ensure that the hydrogen circulation pump can be started smoothly in a cold environment, thereby improving the driving experience, such as Figure 1 As shown, the present invention provides a hydrogen circulation pump cold start drainage calibration system. The hydrogen circulation pump cold start drainage calibration system comprises an air compressor 1, a water supply device 2, a mixer 3, an environment simulation device 4 and a water quantity measuring device 6.

[0040] Among them, the air supply pressure of the air compressor 1 can be set; the water supply amount of the water supply device 2 can be set according to the anode water amount of the fuel cell corresponding to the electrical density point of the stack; the mixer 3 is connected to the air compressor 1 and the water supply device 2; the environmental simulation device 4 has a hollow cavity, the temperature and humidity of the environmental simulation device 4 can be adjusted, and a hydrogen circulation pump 5 is arranged in the hollow cavity, the outlet of the mixer 3 is connected to the inlet of the hydrogen circulation pump 5, and a drain valve 51 is integrated at the outlet of the hydrogen circulation pump 5, and the opening of the drain valve 51 is arranged vertically downward; the water volume measuring device 6 is arranged below the drain valve 51, and is used to collect and measure the amount of water discharged through the drain valve 51.

[0041] During the calibration process, the environmental simulation device 4 is first adjusted according to the humidity and temperature of the environment corresponding to the calibration, so as to simulate the state of the hydrogen circulation pump 5 in the external environment. By setting the air pressure and setting the corresponding water supply according to the anode water volume of the fuel cell corresponding to the electric density point of the stack, the gas state of the hydrogen circulation pump 5 during operation can be simulated. The water volume measuring device 6 is used to collect and measure the water volume discharged through the drain valve 51, so as to determine the discharged water volume, thereby determining the residual water volume in the hydrogen circulation pump 5. By controlling the opening of the hydrogen circulation pump 5, the air compressor 1 and the drain valve 51, the residual water volume in the hydrogen circulation pump 5 can be reduced, thereby starting the hydrogen circulation pump 5 in the environmental simulation device 4. In the above manner, the conditions for starting the hydrogen circulation pump 5 under the corresponding environmental temperature and humidity can be tested, so that in the actual environment, the hydrogen circulation pump 5 can be ensured to start smoothly in a cold environment, thereby improving the driving experience.

[0042] Furthermore, the hydrogen circulation pump cold start drainage calibration system also includes a power supply 7 and a controller 71, the power supply 7 is electrically connected to the controller 71, and the controller 71 is electrically connected to the hydrogen circulation pump 5, the air compressor 1 and the water supply device 2. By setting the controller 71, it is convenient to control the start and stop and the speed of the hydrogen circulation pump 5, and it is also possible to control the air compressor 1 and the water supply device 2, and the power supply 7 is provided to provide electrical energy.

[0043] Furthermore, a humidifier 41 and a temperature regulator 42 are fixedly arranged in the hollow cavity of the environmental simulation device 4, and the humidifier 41 and the temperature regulator 42 are both electrically connected to the controller 71. The humidifier 41 and the temperature regulator 42 can be controlled by the controller 71, so that the temperature and humidity in the environmental box can be adjusted according to the needs of the test. Different temperatures and humidities can be set according to actual needs, and different environments can be fully simulated. The hydrogen circulation pump 5 is tested and calibrated under different temperatures and humidities.

[0044] Furthermore, the environment simulation device 4 is provided with a temperature sensor 43 and a humidity sensor 44, and both the temperature sensor 43 and the humidity sensor 44 are electrically connected to the controller 71. By providing the temperature sensor 43, the temperature of the environment simulation device 4 can be detected in real time, and by providing the humidity sensor 44, the humidity of the environment simulation device 4 can be detected in real time, and the collected data is transmitted to the controller 71. The controller 71 adjusts the humidity and temperature of the environment simulation device 4 in real time according to the collected data of the temperature sensor 43 and the humidity sensor 44, so as to ensure that the humidity and temperature of the environment simulation device 4 meet the test requirements.

[0045] Furthermore, the controller 71 is integrated with a display 711, and the display 711 is used to display the temperature of the environment simulation device 4 collected by the temperature sensor 43 and the humidity of the environment simulation device 4 collected by the humidity sensor 44. By setting the display 711, the humidity and temperature of the environment simulation device 4 can be displayed, which is convenient for the tester to understand the status of the environment simulation device 4 in time and ensure the smooth progress of the calibration work.

[0046] Further, a speed sensor is provided on the hydrogen circulation pump 5, and the speed sensor is electrically connected to the controller 71, and the speed sensor is used to measure the speed of the hydrogen circulation pump 5. By providing the speed sensor, the speed of the hydrogen circulation pump 5 can be measured, so that when controlling the start of the hydrogen circulation pump 5, it is convenient to judge at what speed the hydrogen circulation pump 5 can be started smoothly in a cold environment, which is convenient for subsequent calibration work.

[0047] Furthermore, the hydrogen circulation pump cold start drainage calibration system further includes a timer, which is electrically connected to the controller 71. By setting the timer, it is convenient to time the calibration time, thereby facilitating accurate control of the calibration test process.

[0048] Furthermore, a pressure relief valve is provided on the air compressor 1, and the pressure relief valve is connected to the pressure relief port of the air compressor 1. By providing the pressure relief valve, when the air compressor 1 fails, the gas can be quickly discharged through the pressure relief valve, thereby ensuring the safety of the air compressor 1.

[0049] Furthermore, a first switch valve is provided at the exhaust port of the air compressor 1, and a second switch valve is provided at the water outlet of the water supply device 2. When the air compressor 1 is used for air supply and the water supply device 2 is used for water supply, the first switch valve and the second switch valve are opened, and after the air supply and water supply are completed, the first switch valve and the second switch valve are closed. By providing the first switch valve and the second switch valve, the influence of external water vapor on the hydrogen circulation pump 5 is avoided, thereby ensuring the smooth progress of the test work and the accuracy of the test data. Moreover, during the test process, if the hydrogen circulation pump 5 fails, the gas path can be quickly cut off by the first switch valve and the second switch valve to avoid accidents.

[0050] Furthermore, a water volume detection sensor is provided in the water volume measuring device 6 , and the water volume detection sensor is electrically connected to the controller 71 . The controller 71 can obtain the water volume in the water volume measuring device 6 in real time, thereby facilitating rapid determination of the water volume discharged through the hydrogen circulation pump 5 .

[0051] like Figure 2 As shown, this embodiment also provides a calibration method, using the above hydrogen circulation pump cold start drainage calibration system to calibrate the start of the hydrogen circulation pump 5, including the following steps:

[0052] S1, placing the hydrogen circulation pump 5 in the environmental simulation device 4, and placing the water volume measuring device 6 below the drain valve 51 of the hydrogen circulation pump 5;

[0053] S2, setting the temperature and humidity of the environment simulation device 4, and freezing the hydrogen circulation pump 5 to a preset temperature in the environment simulation device 4;

[0054] S3, setting the air supply pressure of the air compressor 1, and setting the water supply amount of the water supply device 2 according to the anode water amount of the fuel cell corresponding to the electric density point of the stack;

[0055] S4, open the first switch valve, the second switch valve, the air compressor 1, the water supply device 2 and the hydrogen circulation pump 5, and open the drain valve 51 according to the set frequency;

[0056] S5, after the hydrogen circulation pump 5 has worked for the first set time, the hydrogen circulation pump 5 and the water supply device 2 are turned off, the second switch valve is closed, and the gas supply is continued for the purge operation for the second set time;

[0057] S6, the drain valve 51 is powered off and stops working, the air compressor 1 is turned off, and the first switch valve is closed;

[0058] S7, the hydrogen circulation pump 5 is frozen in the environmental simulation device 4 for a third set time;

[0059] S8, open the first switch valve, the drain valve 51 and the air compressor 1, start the hydrogen circulation pump 5 according to the set speed, if it is successfully started, then record the drainage of the hydrogen circulation pump 5, the second set time, the rotation speed of the hydrogen circulation pump 5 and the set frequency of the switch valve. If the hydrogen circulation pump 5 is not started, repeat steps S4-S8, and adjust the length of the second set time, the rotation speed of the hydrogen circulation pump 5 and the set frequency of the switch valve until the hydrogen circulation pump 5 can be started. The drainage of the hydrogen circulation pump 5, the second set time, the rotation speed of the hydrogen circulation pump 5 and the set frequency of the switch valve are stored in the vehicle controller 71. When facing the temperature and humidity of the corresponding environment and the corresponding fuel cell stack density point, the hydrogen circulation pump 5 can be started directly by using the corresponding second set time length, the rotation speed of the hydrogen circulation pump 5 and the set frequency of the switch valve to improve the driving experience.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Hydrogen circulation pump cold start drainage calibration system, characterized in that: include: An air compressor (1), the air supply pressure of the air compressor (1) being adjustable; A water supply device (2), wherein the water supply amount of the water supply device (2) can be set according to the anode water amount of the fuel cell corresponding to the electric density point of the fuel cell stack; A mixer (3), the mixer (3) being in communication with the air compressor (1) and the water supply device (2); An environmental simulation device (4) has a hollow cavity, the temperature and humidity of the environmental simulation device (4) can be adjusted, a hydrogen circulation pump (5) is arranged in the hollow cavity, the outlet of the mixer (3) is connected to the inlet of the hydrogen circulation pump (5), a drain valve (51) is integrated at the outlet of the hydrogen circulation pump (5), and the opening of the drain valve (51) is arranged vertically downward; A water volume measuring device (6), the water volume measuring device (6) is arranged below the drain valve (51) and is used to collect and measure the volume of water discharged through the drain valve (51).

2. The hydrogen circulation pump cold start drainage calibration system according to claim 1, characterized in that: It also includes a power supply (7) and a controller (71), wherein the power supply (7) is electrically connected to the controller (71), and the controller (71) is electrically connected to the hydrogen circulation pump (5), the air compressor (1) and the water supply device (2).

3. The hydrogen circulation pump cold start drainage calibration system according to claim 2, characterized in that: The environment simulation device (4) is provided with a temperature sensor (43) and a humidity sensor (44), and both the temperature sensor (43) and the humidity sensor (44) are electrically connected to the controller (71).

4. The hydrogen circulation pump cold start drainage calibration system according to claim 3, characterized in that: The controller (71) is integrated with a display (711), and the display (711) is used to display the temperature of the environment simulation device (4) collected by the temperature sensor (43) and the humidity of the environment simulation device (4) collected by the humidity sensor (44).

5. The hydrogen circulation pump cold start drainage calibration system according to claim 2, characterized in that: A humidifier (41) and a temperature regulator (42) are fixedly arranged in the hollow cavity of the environment simulation device (4), and the humidifier (41) and the temperature regulator (42) are both electrically connected to the controller (71).

6. The hydrogen circulation pump cold start drainage calibration system according to claim 2, characterized in that: The hydrogen circulation pump (5) is provided with a rotation speed sensor, the rotation speed sensor is electrically connected to the controller (71), and the rotation speed sensor is used to detect the rotation speed of the hydrogen circulation pump (5).

7. The hydrogen circulation pump cold start drainage calibration system according to claim 2, characterized in that: It also includes a timer, which is electrically connected to the controller (71).

8. The hydrogen circulation pump cold start drainage calibration system according to claim 1, characterized in that: The air compressor (1) is provided with a pressure relief valve, and the pressure relief valve is connected to the pressure relief port of the air compressor (1).

9. The hydrogen circulation pump cold start drainage calibration system according to claim 1, characterized in that: A first switch valve is provided at the exhaust port of the air compressor (1), and a second switch valve is provided at the water outlet of the water supply device (2).

10. A calibration method, characterized in that: Using the hydrogen circulation pump cold start drainage calibration system as claimed in any one of claims 1 to 9 to calibrate the start of the hydrogen circulation pump (5), comprising the following steps: S1, placing the hydrogen circulation pump (5) in the environmental simulation device (4), and placing the water volume measuring device (6) below the drain valve (51) of the hydrogen circulation pump (5); S2, setting the temperature and humidity of the environment simulation device (4), wherein the hydrogen circulation pump (5) is frozen to a preset temperature in the environment simulation device (4); S3, setting the air supply pressure of the air compressor (1), and setting the water supply amount of the water supply device (2) according to the anode water amount of the fuel cell corresponding to the electric density point of the fuel cell stack; S4, turning on the air compressor (1), the water supply device (2) and the hydrogen circulation pump (5), and opening the drain valve (51) according to a set frequency; S5, after the hydrogen circulation pump (5) has worked for a first set time, the hydrogen circulation pump (5) and the water supply device (2) are turned off, and the gas supply is continued for a second set time for purging operation; S6, the drain valve (51) is powered off and stops working, and the air compressor (1) is turned off; S7, the hydrogen circulation pump (5) is frozen in the environmental simulation device (4) for a third set time; S8, opening the drain valve (51) and the air compressor (1), starting the hydrogen circulation pump (5) at the set speed, and if successfully started, recording the drainage volume of the hydrogen circulation pump (5), the second set time, the speed of the hydrogen circulation pump (5) and the set frequency of the drain valve (51).

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