Durability testing system, durability testing method and vehicle

Abstract

The present invention belongs to the technical field of fuel cells, and discloses a durability test system, a durability test method and a vehicle. The durability test system comprises a hydrogen supply component, a hydrogen circulation pump, a hydrogen injection valve, a boost pump, a first intercooler, a first switch valve, a second intercooler, a second switch valve, a heat dissipation component, a three-way valve and a box body. The box body has a sealed cavity for accommodating hydrogen, and the hydrogen supply component is connected to the sealed cavity. The hydrogen circulation pump and the hydrogen injection valve are placed in a sealed box filled with hydrogen for durability testing, which can save a lot of hydrogen. In addition, the durability test system can simultaneously take into account the durability tests of the hydrogen circulation pump and the hydrogen injection valve by adjusting the first switch valve and the second switch valve, thereby reducing the test cost and improving the durability test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a durability testing system, a durability testing method and a vehicle. Background Art

[0002] With the development of economy and the advancement of science and technology, low-carbon and environmental protection are attracting more and more attention. The development of new energy vehicles has gradually shifted from electric vehicles to hydrogen fuel cell vehicles, which are devices that generate electricity through chemical reactions between hydrogen and oxygen. They are clean and pollution-free, have high specific power, and can meet application needs in transportation, fixed power supplies and other fields.

[0003] In the field of fuel cells, hydrogen circulation pumps and hydrogen injection valves are the core components of fuel cells, which transport unreacted hydrogen from the outlet of the fuel cell stack back to the inlet of the stack for recycling, thereby improving the utilization rate of hydrogen. Before using the hydrogen circulation pump, a durability performance test is required. In the prior art, when testing the hydrogen circulation pump, hydrogen is usually passed into the hydrogen circulation pump and then discharged, and a durability test is performed by continuously introducing and exhausting air into the hydrogen circulation pump. However, the problem is that if the hydrogen injection valve is tested, additional testing equipment needs to be set up for testing, which is costly.

[0004] Therefore, there is an urgent need for a durability testing system, a durability testing method and a vehicle to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a durability test system, which can simultaneously take into account the durability test of a hydrogen circulation pump and a hydrogen injection valve by adjusting a first switch valve and a second switch valve, thereby reducing the test cost and improving the durability test efficiency.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A durability testing system, comprising:

[0008] Hydrogen circulation pump;

[0009] Hydrogen injection valve;

[0010] A hydrogen supply component, used for supplying hydrogen to the hydrogen circulation pump and the hydrogen injection valve;

[0011] A booster pump, wherein the input end of the booster pump is connected to the hydrogen supply assembly, the output end of the booster pump is connected to the hydrogen injection valve, and the booster pump is used to deliver hydrogen to the hydrogen injection valve;

[0012] A first intercooler, wherein a medium-side input end of the first intercooler is connected to the hydrogen supply component;

[0013] a first switch valve, wherein an input end of the first switch valve is connected to a medium-side output end of the first intercooler, and an output end of the first switch valve is connected to an input end of the hydrogen circulation pump;

[0014] a second intercooler, wherein a medium-side output end of the second intercooler is connected to the hydrogen injection valve;

[0015] a second switch valve, wherein an input end of the second switch valve is connected to an output end of the medium side of the first intercooler, and an output end of the second switch valve is connected to an input end of the medium side of the second intercooler;

[0016] A heat dissipation component, wherein an input end of the heat dissipation component is simultaneously connected to a heat exchange side output end of the first intercooler and a heat exchange side output end of the second intercooler;

[0017] A three-way valve having an A1 interface, an A2 interface and an A3 interface, wherein the A2 interface is connected to one of the A3 interface and the A1 interface, the A2 interface is connected to the output end of the heat dissipation component, the A3 interface is connected to the heat exchange side input end of the first intercooler, and the A1 interface is connected to the heat exchange side input end of the second intercooler;

[0018] The box body has a sealed cavity for accommodating hydrogen, the hydrogen supply component is connected to the sealed cavity, the hydrogen circulation pump, the hydrogen injection valve, the first intercooler and the second intercooler are all located in the sealed cavity, and the three-way valve and the heat dissipation component are both located outside the sealed cavity.

[0019] Preferably, the durability testing system further comprises an exhaust component, wherein the exhaust component is connected to the sealed cavity and is used to exhaust the gas in the sealed cavity to the outside of the box.

[0020] Preferably, the exhaust assembly comprises a fan and a third switch valve, an input end of the third switch valve is connected to the box body, and an output end of the third switch valve faces the fan.

[0021] Preferably, the exhaust assembly further comprises a pressure relief valve, an input end of the pressure relief valve is connected to the housing, and an output end of the pressure relief valve is connected to the atmosphere.

[0022] Preferably, the hydrogen supply component includes a fourth switch valve, a pressure reducing valve, a bottle mouth valve and a hydrogen storage tank, the output end of the fourth switch valve is connected to the box body, the input end of the fourth switch valve is connected to the output end of the pressure reducing valve, the input end of the bottle mouth valve is connected to the hydrogen storage tank, the output end of the bottle mouth valve is connected to the input end of the pressure reducing valve, the bottle mouth valve is used to open or close the hydrogen storage tank, and the pressure reducing valve is used to reduce the gas pressure value of the hydrogen.

[0023] To achieve the above object, the present invention further provides a durability testing method. Through the implementation of the above durability testing system, the durability testing method includes:

[0024] The air in the sealed cavity is evacuated to a negative pressure through an exhaust component, the air pressure P in the sealed cavity is collected, and the air pressure P in the sealed cavity is compared with P0, where P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed;

[0025] The sealed cavity is filled with hydrogen through the hydrogen supply component, the gas pressure Pb at the input end of the hydrogen circulation pump is collected, and the gas pressure Pb at the input end of the hydrogen circulation pump is compared with Pb1, wherein Pb1 is the gas pressure of the hydrogen in the hydrogen supply component, and when Pb=Pb1, the hydrogen supply component introduces hydrogen into the sealed cavity;

[0026] The durability test of the hydrogen circulation pump is performed, and the durability test of the hydrogen circulation pump includes:

[0027] Open the first switch valve, the A2 interface and the A3 interface, close the second switch valve and the A1 interface, start the hydrogen circulation pump, and adjust the pressure at the output end of the hydrogen circulation pump to the set pressure;

[0028] Collecting the input end temperature Tb of the hydrogen circulation pump, and comparing Tb with Tb1, wherein Tb1 is the optimal input end temperature of the hydrogen circulation pump;

[0029] When Tb≥Tb1, the heat dissipation component is turned on; when Tb<Tb1, the heat dissipation component is turned off.

[0030] Preferably, the durability test system further comprises a back pressure valve, the back pressure valve is located in the box, the input end of the back pressure valve is connected to the output end of the hydrogen circulation pump and the output end of the hydrogen injection valve at the same time, and the output end of the back pressure valve is connected to the sealed cavity;

[0031] The pressure at the output end of the hydrogen circulation pump is adjusted to a set pressure by adjusting the rotation speed of the hydrogen circulation pump and the opening of the back pressure valve.

[0032] Preferably, the durability testing method further comprises:

[0033] The air in the sealed cavity is evacuated to a negative pressure through the exhaust component, the air pressure P in the sealed cavity is collected, and the air pressure P in the sealed cavity is compared with P0, where P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed;

[0034] The sealed cavity is filled with hydrogen through the hydrogen supply component, the air pressure Pc at the input end of the hydrogen injection valve is collected, and the air pressure Pc at the input end of the hydrogen injection valve is compared with Pc1, wherein Pc1 is the air pressure of the hydrogen in the hydrogen supply component, and when Pc=Pc1, the hydrogen supply component passes hydrogen into the sealed cavity;

[0035] The durability test of the hydrogen injection valve is performed, and the durability test of the hydrogen injection valve includes:

[0036] Open the second switch valve, the A1 and A2 interfaces, close the first switch valve and the A3 interface, start the hydrogen injection valve, and adjust the pressure at the output end of the hydrogen injection valve to the set pressure;

[0037] Collecting the input end temperature Tc of the hydrogen injection valve, and comparing the Tc with Tc1, wherein Tc1 is the optimal input end temperature of the hydrogen injection valve;

[0038] When Tc≥Tc1, the heat dissipation component is turned on; when Tc<Tc1, the heat dissipation component is turned off.

[0039] Preferably, the pressure at the output end of the hydrogen injection valve is adjusted to a set pressure by adjusting the rotation speed of the hydrogen injection valve and the opening of the back pressure valve.

[0040] To achieve the above object, the present invention also provides a vehicle, comprising the above durability testing system.

[0041] The beneficial effects of the present invention are:

[0042] The present invention provides a durability test system, wherein the three-way valve has an A1 interface, an A2 interface and an A3 interface, wherein the A2 interface is connected to one of the A3 interface and the A1 interface, the A2 interface is connected to the output end of the heat dissipation component, the A1 interface is connected to the heat exchange side input end of the first intercooler, and the A3 interface is connected to the heat exchange side input end of the second intercooler. The box body has a sealed cavity for accommodating hydrogen, the hydrogen supply component is connected to the sealed cavity, the hydrogen circulation pump, the hydrogen injection valve, the first intercooler and the second intercooler are all located in the sealed cavity, and the three-way valve and the heat dissipation component are all located outside the sealed cavity. Placing the hydrogen circulation pump and the hydrogen injection valve in a closed box filled with hydrogen for durability testing can save a large amount of hydrogen. In addition, the durability test system can simultaneously take into account the durability tests of the hydrogen circulation pump and the hydrogen injection valve by adjusting the first switch valve and the second switch valve, thereby reducing the test cost and improving the durability test efficiency.

[0043] The present invention provides a durability test method, which firstly pumps the air in a sealed cavity into a negative pressure, and then fills the sealed cavity with hydrogen through a hydrogen supply component. The durability test of a hydrogen circulation pump comprises: opening a first switch valve, an A2 interface and an A3 interface, closing a second switch valve and an A1 interface, starting the hydrogen circulation pump, adjusting the pressure at the output end of the hydrogen circulation pump to a set pressure, collecting the input end temperature Tb of the hydrogen circulation pump, and comparing Tb with Tb1, wherein Tb1 is the optimal input end temperature of the hydrogen circulation pump; when Tb≥Tb1, the heat dissipation component is turned on; when Tb<Tb1, the heat dissipation component is turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of a durability testing system in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1. Box; 2. Hydrogen injection valve; 3. First temperature and pressure sensor; 4. Second intercooler; 5. Booster pump; 6. Three-way valve; 7. Water pump; 8. Second switch valve; 9. Radiator; 10. Fourth switch valve; 11. Hydrogen storage tank; 12. Bottle valve; 13. Pressure reducing valve; 14. Fan; 15. Third switch valve; 16. Second temperature and pressure sensor; 17. Pressure relief valve; 18. Flow meter; 19. First intercooler; 20. Third temperature and pressure sensor; 21. First switch valve; 22. Hydrogen circulation pump; 23. Fourth temperature and pressure sensor; 24. Back pressure valve. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. 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 parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] 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.

[0050] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] In the prior art, when testing a hydrogen circulation pump, hydrogen is usually passed into the hydrogen circulation pump and then discharged, and a durability test is performed by continuously introducing and exhausting the hydrogen circulation pump. However, the problem is that if the hydrogen injection valve is tested, an additional test device needs to be set up for testing, which is costly. In this regard, the present embodiment provides a durability test system and a durability test method, which simultaneously takes into account the durability test of the hydrogen circulation pump and the hydrogen injection valve by adjusting the first switch valve and the second switch valve, thereby reducing the test cost and improving the durability test efficiency.

[0052] like Figure 1As shown, in this embodiment, a durability test system includes a hydrogen supply component, a hydrogen circulation pump 22, a hydrogen injection valve 2, a booster pump 5, a first intercooler 19, a first switch valve 21, a second intercooler 4, a second switch valve 8, a heat dissipation component, a three-way valve 6 and a box 1, the hydrogen supply component is used to provide hydrogen to the hydrogen circulation pump 22 and the hydrogen injection valve 2, the input end of the booster pump 5 is connected to the hydrogen supply component, the output end of the booster pump 5 is connected to the hydrogen injection valve 2, the booster pump 5 is used to deliver hydrogen to the hydrogen injection valve 2, the medium side input end of the first intercooler 19 is connected to the hydrogen supply component The input end of the first switch valve 21 is connected to the medium side output end of the first intercooler 19, the output end of the first switch valve 21 is connected to the input end of the hydrogen circulation pump 22, the medium side output end of the second intercooler 4 is connected to the hydrogen injection valve 2, the input end of the second switch valve 8 is connected to the medium side output end of the first intercooler 19, the output end of the second switch valve 8 is connected to the medium side input end of the second intercooler 4, and the input end of the heat dissipation component is simultaneously connected to the heat exchange side output end of the first intercooler 19 and the heat exchange side output end of the second intercooler 4. The three-way valve 6 has an A1 interface, an A2 interface and an A3 interface, and the A2 interface is connected to one of the A3 interface and the A1 interface, the A2 interface is connected to the output end of the heat dissipation component, the A3 interface is connected to the heat exchange side input end of the first intercooler 19, and the A1 interface is connected to the heat exchange side input end of the second intercooler 4. The housing 1 has a sealed cavity for containing hydrogen, the hydrogen supply component is connected to the sealed cavity, the hydrogen circulation pump 22, the hydrogen injection valve 2, the first intercooler 19 and the second intercooler 4 are all located in the sealed cavity, and the three-way valve 6 and the heat dissipation component are all located outside the sealed cavity. Specifically, the hydrogen circulation pump 22 and the hydrogen injection valve 2 are placed in a sealed housing 1 filled with hydrogen for durability testing, wherein the durability test pipeline for the hydrogen circulation pump 22 is: the hydrogen supply component fills the housing 1 with hydrogen, the hydrogen passes through the medium side of the first intercooler 19 and the first switch valve 21 and is sprayed out from the output end of the hydrogen circulation pump 22, and the discharged hydrogen is discharged into the sealed housing 1. When the fourth temperature and pressure sensor 23 measures that the temperature of the hydrogen is too high, the heat dissipation component starts to work, the water pump 7 is turned on, and the coolant enters A2 and exits A3 through the three-way valve 6, and then passes through the first intercooler The heat exchange side of 19 transports hydrogen to the heat dissipation component, which cools the hydrogen. When the measured hydrogen temperature is lower than the set temperature, the heat dissipation component stops working and the hydrogen circulation pump 22 continues to perform the durability test; the durability test pipeline for the hydrogen injection valve 2 is: the hydrogen supply component fills the box 1 with hydrogen, and the hydrogen passes through the medium side of the first intercooler 19, the second switch valve 8 and the boost pump 5. The boost pump 5 pressurizes the hydrogen to form a front and rear pressure difference between the hydrogen injection valve 2 and the injection amount of the hydrogen injection valve 2, so that the pressure value of the first temperature and pressure sensor 3 meets the requirements.The pressurized hydrogen enters the hydrogen injection valve 2 for durability testing, and the discharged hydrogen is discharged into the sealed box 1. When the fourth temperature and pressure sensor 23 measures that the temperature of the hydrogen is too high, the heat dissipation component starts to work, the water pump 7 is turned on, and the coolant enters A2 and exits A1 of the three-way valve 6. After passing through the second intercooler 4, the hydrogen is transported to the heat dissipation component, and the heat dissipation component cools the hydrogen. When the measured hydrogen temperature is lower than the set temperature, the heat dissipation component stops working, and the hydrogen injection valve 2 continues to perform the durability test. A large amount of hydrogen can be saved. In addition, the durability test system can simultaneously take into account the durability test of the hydrogen circulation pump 22 and the hydrogen injection valve 2 by adjusting the first switch valve 21 and the second switch valve 8, reducing the test cost and improving the durability test efficiency.

[0053] Further, continue to refer to Figure 1 The durability test system further includes an exhaust component, which is connected to the sealed cavity and is used to exhaust the gas in the sealed cavity to the outside of the box body 1. Specifically, before the durability test of the hydrogen circulation pump 22 or the hydrogen injection valve 2 is performed, the airtight box body 1 is first evacuated through the exhaust component, and the airtight box body 1 is evacuated when the air pressure in the sealed box body 1 is measured to be negative pressure.

[0054] Further, continue to refer to Figure 1 The exhaust assembly includes a fan 14, a third switch valve 15, and a second temperature and pressure sensor 16. The input end of the third switch valve 15 is connected to the box body 1, and the output end of the third switch valve 15 faces the fan 14. The second temperature and pressure sensor 16 is used to detect the air pressure value in the sealed cavity. Specifically, the connection position between the third switch valve 15 and the box body 1 is sealed to ensure the sealing of the box body 1. Before the durability test, the third switch valve 15 is opened, the fan 14 is started, and the airtight box body 1 is evacuated. The second temperature and pressure sensor 16 monitors the air pressure in the box body 1 in real time. When the air pressure value measured by the second temperature and pressure sensor 16 is negative pressure, the third switch valve 15 is disconnected, and then the fan 14 is turned off to complete the air extraction.

[0055] Further, continue to refer to Figure 1 The exhaust assembly further includes a pressure relief valve 17, the input end of the pressure relief valve 17 is connected to the box body 1, and the output end of the pressure relief valve 17 is connected to the atmosphere. Specifically, during the endurance test of the hydrogen circulation pump 22 or the hydrogen injection valve 2 movement, if the air pressure in the closed box body 1 is too high, the pressure relief valve 17 is opened to release the pressure, and the gas is discharged by opening the third switch valve 15 after the endurance test.

[0056] Further, continue to refer to Figure 1The hydrogen supply assembly includes a fourth switch valve 10, a pressure reducing valve 13, a bottle mouth valve 12 and a hydrogen storage tank 11. The output end of the fourth switch valve 10 is connected to the box 1, the input end of the fourth switch valve 10 is connected to the output end of the pressure reducing valve 13, the input end of the bottle mouth valve 12 is connected to the hydrogen storage tank 11, the output end of the bottle mouth valve 12 is connected to the input end of the pressure reducing valve 13, the bottle mouth valve 12 is used to open or close the hydrogen storage tank 11, and the pressure reducing valve 13 is used to reduce the gas pressure value of hydrogen. Specifically, after the air extraction work of the closed box 1 is completed, the box 1 needs to be filled with hydrogen, the third switch valve 15 is disconnected, the fourth switch valve 10 and the bottle mouth valve 12 are opened, and the hydrogen in the hydrogen storage tank 11 is reduced through the pressure reducing valve 13 to the gas pressure of the input end of the hydrogen circulation pump 22 or the hydrogen injection valve 2, that is, the gas pressure value of the third temperature and pressure sensor 20 is equal to the pressure of the input end of the hydrogen circulation pump 22 or the hydrogen injection valve 2.

[0057] Embodiment 2

[0058] This embodiment provides a durability test method. Through the implementation of the durability test system of the first embodiment, the durability test method is as follows:

[0059] The air in the sealed cavity is evacuated to a negative pressure through the exhaust component, and the air pressure P in the sealed cavity is collected. The air pressure P in the sealed cavity is compared with P0, where P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed. Specifically, before the hydrogen circulation pump 22 or the hydrogen injection valve 2 is subjected to a durability test, the air pressure value in the sealed cavity is first measured as P. When the air pressure value P is greater than or equal to the standard atmospheric pressure P0, the third switch valve 15 is opened, and the fan 14 is started to evacuate the airtight box 1. When the air pressure value P is less than the standard atmospheric pressure, that is, the air pressure in the sealed cavity is a negative pressure, the third switch valve 15 is closed, and then the fan 14 is closed to complete the evacuation.

[0060] The sealed cavity is filled with hydrogen through the hydrogen supply component, and the input end pressure Pb of the hydrogen circulation pump 22 is collected, and the input end pressure Pb of the hydrogen circulation pump 22 is compared with Pb1, wherein Pb1 is the pressure of hydrogen in the hydrogen supply component, and when Pb=Pb1, the hydrogen supply component introduces hydrogen into the sealed cavity. Specifically, the third switch valve 15 is disconnected to complete the air extraction work, and then the fourth switch valve 10 and the bottle mouth valve 12 are opened, the box 1 is filled with hydrogen, and the hydrogen pressure value is equal to the input end pressure value of the hydrogen circulation pump 22, and the hydrogen supply component continuously fills the box 1 with hydrogen.

[0061] A durability test of the hydrogen circulation pump 22 is performed, and the durability test of the hydrogen circulation pump 22 includes: opening the first switch valve 21, the A2 interface and the A3 interface, closing the second switch valve 8 and the A1 interface, starting the hydrogen circulation pump 22, adjusting the pressure at the output end of the hydrogen circulation pump 22 to the set pressure, and collecting the input end temperature Tb of the hydrogen circulation pump 22, comparing Tb with Tb1, wherein Tb1 is the optimal temperature of the input end of the hydrogen circulation pump 22; when Tb≥Tb1, the heat dissipation component is turned on; when Tb<Tb1, the heat dissipation component is turned off. Specifically, when the hydrogen circulation pump 22 is subjected to a durability test, first, the A2 interface and the A3 interface of the three-way valve 6 are opened, and the A1 interface is closed. Then, the hydrogen circulation pump 22 is started, and the first switch valve 21 is opened. The hydrogen supply component provides hydrogen to the sealed cavity. The hydrogen is ejected from the hydrogen circulation pump 22 through the medium side of the first intercooler 19 and the first switch valve 21, and the discharged hydrogen is discharged into the sealed box body 1. When the temperature at the input end of the hydrogen circulation pump 22 is too high, the heat dissipation component is started, and the water pump 7 is turned on. The coolant enters A2 and exits A3 of the three-way valve 6, and then passes through the heat exchange side of the first intercooler 19 to transport the hydrogen to the heat dissipation component, and the heat dissipation component cools the hydrogen. When the measured hydrogen temperature is lower than the set temperature, the heat dissipation component stops working.

[0062] Further, continue to refer to Figure 1 The durability test system also includes a back pressure valve 24, which is located in the box 1. The input end of the back pressure valve 24 is connected to the output end of the hydrogen circulation pump 22 and the output end of the hydrogen injection valve 2 at the same time. The output end of the back pressure valve 24 is connected to the sealed cavity. By adjusting the speed of the hydrogen circulation pump 22 and the opening of the back pressure valve 24, the pressure at the output end of the hydrogen circulation pump 22 is adjusted to the set pressure, so that the flow rate of the flow meter 18 meets the requirements. Specifically, during the durability test of the hydrogen circulation pump 22 or the hydrogen injection valve 2, hydrogen enters from the input end of the hydrogen circulation pump 22 or the hydrogen injection valve 2, and is discharged from the output end of the back pressure valve 24 into the sealed cavity.

[0063] Further, continue to refer to Figure 1 The durability test method also includes: evacuating the air in the sealed chamber into a negative pressure through the exhaust component, collecting the air pressure P in the sealed chamber, and comparing the air pressure P in the sealed chamber with P0, wherein P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed, which is the same as the exhaust preparation process before the durability test of the hydrogen circulation pump 22, and will not be elaborated on.

[0064] The sealed cavity is filled with hydrogen through the hydrogen supply component, the input pressure Pc of the hydrogen injection valve 2 is collected, and the input pressure Pc of the hydrogen injection valve 2 is compared with Pc1, wherein Pc1 is the pressure of hydrogen in the hydrogen supply component, and when Pc=Pc1, the hydrogen supply component introduces hydrogen into the sealed cavity. Specifically, the third switch valve 15 is disconnected to complete the air extraction work, and then the fourth switch valve 10 and the bottle mouth valve 12 are opened, the box 1 is filled with hydrogen, and the hydrogen pressure value is equal to the input pressure value of the hydrogen injection valve 2, and the hydrogen supply component continues to fill the box 1 with hydrogen.

[0065] The durability test of the hydrogen injection valve 2 is performed, and the durability test of the hydrogen injection valve 2 includes: opening the second switch valve 8, A1 and A2 interfaces, closing the first switch valve 21 and A3 interface, starting the hydrogen injection valve 2, adjusting the pressure at the output end of the hydrogen injection valve 2 to the set pressure, and collecting the input end temperature Tc of the hydrogen injection valve 2, comparing Tc with Tc1, wherein Tc1 is the optimal input end temperature of the hydrogen injection valve 2; when Tc≥Tc1, the heat dissipation component is turned on; when Tc<Tc1, the heat dissipation component is turned off. Specifically, when the hydrogen injection valve 2 is subjected to a durability test, first, the A1 interface and the A2 interface of the three-way valve 6 are opened, and the A3 interface is closed. Then, the hydrogen injection valve 2 is started, and the second switch valve 8 is opened. The hydrogen supply component provides hydrogen to the sealed cavity. The hydrogen is sprayed out from the hydrogen injection valve 2 through the medium side of the first intercooler 19 and the second switch valve 8. The discharged hydrogen is discharged into the sealed box 1. When the temperature at the input end of the hydrogen injection valve 2 is too high, the radiator 9 is started, the water pump 7 is turned on, and the coolant enters A2 and exits A1 of the three-way valve 6, and then the hydrogen is transported to the radiator 9 through the heat exchange side of the second intercooler 4. The radiator 9 cools the hydrogen. When the measured hydrogen temperature is lower than the set temperature, the radiator 9 stops working.

[0066] Further, continue to refer to Figure 1 , by adjusting the rotation speed of the hydrogen injection valve 2 and the opening of the back pressure valve 24, the pressure at the output end of the hydrogen injection valve 2 is adjusted to the set pressure, so that the flow meter 18 meets the flow requirement. Specifically, during the endurance test of the hydrogen injection valve 2 or the hydrogen injection valve 2, hydrogen enters from the input end of the hydrogen injection valve 2 or the hydrogen injection valve 2, and is discharged into the sealed cavity from the output end of the back pressure valve 24.

[0067] Embodiment 3

[0068] This embodiment also provides a vehicle, which relates to the field of fuel cell technology and includes the above-mentioned durability test system.

[0069] 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, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. 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. A durability testing system, characterized in that: include: Hydrogen circulation pump (22); Hydrogen injection valve (2); A hydrogen supply component, used for supplying hydrogen to the hydrogen circulation pump (22) and the hydrogen injection valve (2); a booster pump (5), wherein the input end of the booster pump (5) is connected to the hydrogen supply assembly, and the output end of the booster pump (5) is connected to the hydrogen injection valve (2), and the booster pump (5) is used to deliver hydrogen to the hydrogen injection valve (2); A first intercooler (19), wherein a medium-side input end of the first intercooler (19) is connected to the hydrogen supply component; a first switch valve (21), wherein an input end of the first switch valve (21) is connected to a medium-side output end of the first intercooler (19), and an output end of the first switch valve (21) is connected to an input end of the hydrogen circulation pump (22); A second intercooler (4), wherein a medium-side output end of the second intercooler (4) is connected to the hydrogen injection valve (2); a second switch valve (8), wherein an input end of the second switch valve (8) is connected to an output end of the medium side of the first intercooler (19), and an output end of the second switch valve (8) is connected to an input end of the medium side of the second intercooler (4); A heat dissipation component, wherein the input end of the heat dissipation component is simultaneously connected to the heat exchange side output end of the first intercooler (19) and the heat exchange side output end of the second intercooler (4); A three-way valve (6) having an A1 interface, an A2 interface and an A3 interface, wherein the A2 interface is connected to one of the A3 interface and the A1 interface, the A2 interface is connected to the output end of the heat dissipation component, the A3 interface is connected to the heat exchange side input end of the first intercooler (19), and the A1 interface is connected to the heat exchange side input end of the second intercooler (4); The box body (1) has a sealed cavity for accommodating hydrogen, the hydrogen supply component is connected to the sealed cavity, the hydrogen circulation pump (22), the hydrogen injection valve (2), the first intercooler (19) and the second intercooler (4) are all located in the sealed cavity, and the three-way valve (6) and the heat dissipation component are both located outside the sealed cavity.

2. The durability testing system according to claim 1, characterized in that: The durability testing system further comprises an exhaust component, which is connected to the sealed cavity and is used to exhaust the gas in the sealed cavity to the outside of the box (1).

3. The durability testing system according to claim 2, characterized in that: The exhaust assembly comprises a fan (14) and a third switch valve (15), wherein an input end of the third switch valve (15) is connected to the housing (1), and an output end of the third switch valve (15) faces the fan (14).

4. The durability testing system according to claim 3, characterized in that: The exhaust assembly further comprises a pressure relief valve (17), the input end of the pressure relief valve (17) being connected to the box body (1), and the output end of the pressure relief valve (17) being connected to the atmosphere.

5. The durability testing system according to claim 1, characterized in that: The hydrogen supply component comprises a fourth switch valve (10), a pressure reducing valve (13), a bottle mouth valve (12) and a hydrogen storage tank (11); the output end of the fourth switch valve (10) is connected to the box body (1); the input end of the fourth switch valve (10) is connected to the output end of the pressure reducing valve (13); the input end of the bottle mouth valve (12) is connected to the hydrogen storage tank (11); the output end of the bottle mouth valve (12) is connected to the input end of the pressure reducing valve (13); the bottle mouth valve (12) is used to open or close the hydrogen storage tank (11); and the pressure reducing valve (13) is used to reduce the gas pressure value of the hydrogen.

6. A durability test method, characterized in that: Through the implementation of the durability testing system according to any one of claims 1 to 5, the durability testing method comprises: The air in the sealed cavity is evacuated to a negative pressure through an exhaust component, the air pressure P in the sealed cavity is collected, and the air pressure P in the sealed cavity is compared with P0, where P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed; The sealed cavity is filled with hydrogen through the hydrogen supply component, the gas pressure Pb at the input end of the hydrogen circulation pump is collected, and the gas pressure Pb at the input end of the hydrogen circulation pump is compared with Pb1, wherein Pb1 is the gas pressure of the hydrogen in the hydrogen supply component, and when Pb=Pb1, the hydrogen supply component introduces hydrogen into the sealed cavity; The durability test of the hydrogen circulation pump is performed, and the durability test of the hydrogen circulation pump includes: Open the first switch valve, the A2 interface and the A3 interface, close the second switch valve and the A1 interface, start the hydrogen circulation pump, and adjust the pressure at the output end of the hydrogen circulation pump to the set pressure; Collecting the input end temperature Tb of the hydrogen circulation pump, and comparing Tb with Tb1, wherein Tb1 is the optimal input end temperature of the hydrogen circulation pump; When Tb≥Tb1, the heat dissipation component is turned on; when Tb<Tb1, the heat dissipation component is turned off.

7. The durability testing method according to claim 6, characterized in that: The durability test system further comprises a back pressure valve, which is located in the box, wherein the input end of the back pressure valve is connected to the output end of the hydrogen circulation pump and the output end of the hydrogen injection valve at the same time, and the output end of the back pressure valve is connected to the sealed cavity; The pressure at the output end of the hydrogen circulation pump is adjusted to a set pressure by adjusting the rotation speed of the hydrogen circulation pump and the opening of the back pressure valve.

8. The durability testing method according to claim 7, characterized in that: The durability test method also includes: The air in the sealed cavity is evacuated to a negative pressure through the exhaust component, the air pressure P in the sealed cavity is collected, and the air pressure P in the sealed cavity is compared with P0, where P0 is the standard atmospheric pressure. When P≥P0, the exhaust component is opened, and when P<P0, the exhaust component is closed; The sealed cavity is filled with hydrogen through the hydrogen supply component, the air pressure Pc at the input end of the hydrogen injection valve is collected, and the air pressure Pc at the input end of the hydrogen injection valve is compared with Pc1, wherein Pc1 is the air pressure of the hydrogen in the hydrogen supply component, and when Pc=Pc1, the hydrogen supply component passes hydrogen into the sealed cavity; The durability test of the hydrogen injection valve is performed, and the durability test of the hydrogen injection valve includes: Open the second switch valve, the A1 and A2 interfaces, close the first switch valve and the A3 interface, start the hydrogen injection valve, and adjust the pressure at the output end of the hydrogen injection valve to the set pressure; Collecting the input end temperature Tc of the hydrogen injection valve, and comparing the Tc with Tc1, wherein Tc1 is the optimal input end temperature of the hydrogen injection valve; When Tc≥Tc1, the heat dissipation component is turned on; when Tc<Tc1, the heat dissipation component is turned off.

9. The durability testing method according to claim 8, characterized in that: The pressure at the output end of the hydrogen injection valve is adjusted to a set pressure by adjusting the rotation speed of the hydrogen injection valve and the opening of the back pressure valve.

10. A vehicle, characterized in that: A durability testing system comprising the durability testing system according to any one of claims 1 to 5.

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