Air pressure simulation device of hydrogen fuel cell system

Abstract

The utility model discloses an air pressure simulation device of a hydrogen fuel cell system, which relates to the technical field of hydrogen fuel cells and comprises an environment bin with an anti-explosion protective layer, and the anti-explosion protective layer is connected with the ground. A hydrogen fuel cell system is placed in the environment bin, an air inlet, a hydrogen inlet and a tail exhaust outlet are formed in the hydrogen fuel cell system, the air inlet is formed in the environment bin, the hydrogen inlet extends out of the environment bin, and the tail exhaust outlet is communicated with a tail exhaust tank located outside the environment bin; a pressure adjusting assembly is arranged on the environment bin and comprises a vacuum pump located outside the environment bin, and the vacuum pump is connected with the environment bin and the tail discharge tank so that the air pressure of the environment bin can be kept consistent with the air pressure of the tail discharge tank. According to the air pressure simulation device for the hydrogen fuel cell system, the whole hydrogen fuel cell system is placed in the environment bin, the air inlet and the exhaust outlet of the hydrogen fuel cell system are both located in the set low-air-pressure environment, and operation simulation of the hydrogen fuel cell system is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cells, in particular to a gas pressure simulation device for a hydrogen fuel cell system. Background Art

[0002] At present, the application scenarios of hydrogen fuel cell systems are becoming more and more extensive, and the regions where hydrogen fuel cell systems operate are becoming more and more complex. Various users have put forward more stringent application requirements for hydrogen fuel cell systems, such as requiring hydrogen fuel cell systems to be able to operate stably and output full power in plateau environments. This requires low-pressure operation tests on hydrogen fuel cell systems to ensure that the performance of hydrogen fuel cell systems can meet the set requirements in plateau environments.

[0003] In the existing low-pressure operation test of hydrogen fuel cell systems, the means of simulating the air pressure environment of plateau areas are generally adopted, or the entire hydrogen fuel cell system is transported to the plateau area for field testing. However, these two testing methods have certain limitations.

[0004] In the existing test link of simulating the atmospheric pressure in plateau areas, generally only the air inlet and exhaust outlet of the hydrogen fuel cell system are subjected to simulated low pressure, while the rest of the hydrogen fuel cell system, such as the water system, is still under normal pressure. The test parameters of the entire hydrogen fuel cell system are different, and there is a lack of unified environmental factors. It is impossible to fully simulate the operating conditions of the hydrogen fuel cell system in the actual plateau environment, and it is difficult to make an overall evaluation of the performance of the entire hydrogen fuel cell system in the plateau environment. The accuracy of the experimental results is questionable. If the entire hydrogen fuel cell system is transported to the plateau for on-site low-pressure testing, the testing of different atmospheric pressure conditions often requires going to regions at different altitudes, and the cost of the test is too high. Utility Model Content

[0005] The utility model aims to provide a hydrogen fuel cell system air pressure simulation device, which can not only test the performance of the hydrogen fuel cell system under different air pressures, but also verify the operation of all parts of the hydrogen fuel cell system under low air pressure environment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hydrogen fuel cell system air pressure simulation device, comprising an environmental chamber with an explosion-proof protective layer, the explosion-proof protective layer being grounded; a hydrogen fuel cell system connected to each other is placed in the environmental chamber, the hydrogen fuel cell system is provided with an air inlet, a hydrogen inlet and a tail exhaust outlet, wherein the air inlet is provided in the environmental chamber, the hydrogen inlet extends to the outside of the environmental chamber, and the tail exhaust outlet is connected to a tail exhaust tank located outside the environmental chamber; the hydrogen fuel cell system is also connected to a power source and a load located outside the environmental chamber;

[0008] A pressure regulating component is arranged on the environmental chamber, and the pressure regulating component includes a vacuum pump located outside the environmental chamber, and the vacuum pump is connected to the environmental chamber and the tail exhaust tank respectively, so that the air pressure of the environmental chamber and the tail exhaust tank are kept consistent, and an environmental chamber air extraction valve for controlling the internal air pressure of the environmental chamber is arranged on the pipeline connecting the vacuum pump and the environmental chamber, and a tail exhaust tank air extraction valve for controlling the internal air pressure of the tail exhaust tank is arranged on the pipeline connecting the vacuum pump and the tail exhaust tank.

[0009] After the power source and the load are connected to the hydrogen fuel cell system, the externally supplied hydrogen enters the hydrogen fuel cell system located inside the environmental chamber through the hydrogen inlet from outside the environmental chamber, and the air enters the hydrogen fuel cell system through the air inlet located inside the environmental chamber. The power source provides energy and power for the operation of the hydrogen fuel cell system, so that the hydrogen fuel cell system enters normal operation using the load. The tail gas and tail liquid generated by the hydrogen fuel cell system during operation are discharged together into the tail exhaust tank located outside the environmental chamber, and are discharged into the atmosphere and drainage pipes respectively through the tail exhaust tank.

[0010] According to the required air pressure in the environmental chamber, adjust the speed of the vacuum pump, extract the gas inside the environmental chamber and the tail exhaust tank, adjust the internal air pressure of the environmental chamber and the tail exhaust tank to the required air pressure, and keep the internal air pressure of the environmental chamber and the tail exhaust tank consistent. When the internal air pressure of the environmental chamber and the tail exhaust tank is adjusted to the required air pressure, the tester can maintain or adjust the current air pressure value according to the test requirements, and start the hydrogen fuel cell system to perform a performance test on the hydrogen fuel cell system in a low pressure environment.

[0011] In one embodiment, an air inlet valve connected to the internal space is provided on the environmental chamber to replenish air into the interior of the environmental chamber to ensure the normal operation of the hydrogen fuel cell system.

[0012] In one embodiment, a hydrogen regulating valve for controlling the flow rate of hydrogen is provided on the pipeline extending from the hydrogen inlet to the outside of the environmental chamber. In combination with the hydrogen regulating valve controlling the supply rate of external hydrogen, the hydrogen fuel cell system can adjust different operating powers, so that the hydrogen fuel cell system can perform performance tests at different operating powers in the environmental chamber.

[0013] In one embodiment, there are multiple vacuum pumps, which are connected in parallel, and the multiple vacuum pumps connected in parallel are respectively connected to the environment chamber and the tail exhaust tank to extract the gas in the environment chamber and the tail exhaust tank, and reduce the pressure inside the environment chamber and the tail exhaust tank. The parallel design of multiple vacuum pumps can more flexibly adjust the internal air pressure of the environment chamber and the tail exhaust tank, so that the air pressure changes of the environment chamber and the tail exhaust tank can better fit the real environment of the plateau.

[0014] In one embodiment, the air inlet is connected to an air filter for filtering particulate matter to ensure the normal operation of the hydrogen fuel cell system.

[0015] In one embodiment, the environment chamber and / or the tail discharge tank are both provided with a hydrogen concentration protection component, which includes a plurality of hydrogen concentration sensors provided on the environment chamber, and an exhaust valve, and the exhaust valve is connected to an exhaust fan for forcibly extracting the gas inside the environment chamber. The plurality of hydrogen concentration sensors monitor the hydrogen concentration inside the environment chamber and the tail discharge tank in real time. Through the arrangement of the plurality of hydrogen concentration sensors, the environment chamber and the tail discharge tank can set different alarm mechanisms according to different hydrogen concentrations inside, and when the hydrogen concentration inside the environment chamber and the tail discharge tank reaches a preset alarm level, the exhaust fan and the exhaust valve are controlled to forcibly discharge the gas inside the environment chamber and the tail discharge tank, thereby ensuring the safety of the environment chamber and the tail discharge tank.

[0016] In one embodiment, multiple pressure relief valves with different pressure relief thresholds are provided on the environmental chamber and / or the tail discharge tank. The multiple pressure relief valves can achieve multi-level overpressure protection. Even if a pressure relief valve fails, the remaining pressure relief valves can ensure the safety of the environmental chamber and the tail discharge tank.

[0017] In one embodiment, the hydrogen fuel cell system is connected to a cooling fan located in the environmental chamber, and a cooling circulation loop is provided in the hydrogen fuel cell system, and the cooling circulation loop is connected to the cooling fan.

[0018] In one embodiment, the hydrogen fuel cell system is connected to a coolant device located outside the environmental chamber and a coolant pipe located on the environmental chamber, the coolant pipe is connected to the coolant device, and the coolant pipe is connected to a cooling circulation loop of the hydrogen fuel cell system, so that the coolant of the coolant device enters the cooling circulation loop.

[0019] This hydrogen fuel cell system air pressure simulation device is equipped with two heat dissipation methods for the hydrogen fuel cell system. According to the operation of the hydrogen fuel cell system, the two heat dissipation methods can be selected one by one or both at the same time. The internal temperature of the environmental chamber is maintained by the gas circulation design in the environmental chamber and the refrigeration design outside the environmental chamber, so that the internal temperature of the environmental chamber is kept at the set temperature.

[0020] Compared with the prior art, the gas pressure simulation device for a hydrogen fuel cell system according to the present utility model has the following beneficial effects:

[0021] (1) The hydrogen fuel cell system air pressure simulation device places the hydrogen fuel cell system as a whole in an environmental chamber. The air inlet and exhaust outlet of the hydrogen fuel cell system are both in a set low-pressure environment, and the operation simulation of the hydrogen fuel cell system is more accurate;

[0022] (2) The environmental chamber of the hydrogen fuel cell system air pressure simulation device has multiple safety protection designs and high safety, which can effectively ensure the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the gas pressure simulation device of the hydrogen fuel cell system in Example 1 of the utility model;

[0024] Figure 2 It is a schematic diagram of the air pressure simulation device of the hydrogen fuel cell system in Example 2 of the present utility model.

[0025] In the figure, 1. environmental chamber; 2. hydrogen fuel cell system; 20. air inlet; 21. hydrogen inlet; 22. tail exhaust outlet; 3. air filter; 4. hydrogen regulating valve; 5. tail exhaust tank; 6. cooling fan; 60. cooling circulation loop; 7. power source; 8. load; 9. vacuum pump; 10. environmental chamber exhaust valve; 11. tail exhaust tank exhaust valve; 12. air inlet valve; 13. electric pressure relief valve; 14. mechanical pressure relief valve; 15. exhaust valve; 16. exhaust fan; 17. coolant device; 18. hydrogen inlet valve. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In the description of the present utility model, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0030] Example 1

[0031] like Figure 1 As shown, a hydrogen fuel cell system air pressure simulation device preferably implemented in the utility model comprises an environmental chamber 1 having an explosion-proof protective layer, the explosion-proof protective layer being grounded; a hydrogen fuel cell system 2 and a heat dissipation device connected to each other are placed in the environmental chamber 1. The explosion-proof protective layer can be a structural layer made of metal material arranged in the main structure of the environmental chamber 1, or the main structure of the environmental chamber 1 can be directly prepared with metal material, so that the main structure of the environmental chamber 1 itself forms a structural layer with explosion-proof effect.

[0032] In this embodiment 1, the hydrogen fuel cell system 2 is provided with an air inlet 20, a hydrogen inlet 21 and a tail exhaust outlet 22, wherein:

[0033] The air inlet 20 is disposed in the environmental chamber 1, and the air inlet 20 is connected to an air filter 3 for filtering particulate matter;

[0034] The hydrogen inlet 21 extends to the outside of the environmental chamber 1, and a hydrogen regulating valve 4 for controlling the flow rate of hydrogen is arranged on the pipeline extending from the hydrogen inlet 21 to the outside of the environmental chamber 1;

[0035] The tail discharge outlet 22 is communicated with the tail discharge tank 5 located outside the environmental chamber 1 .

[0036] The heat dissipation device includes a heat dissipation fan 6 located in the environmental chamber 1 . A cooling circulation loop 60 is provided in the hydrogen fuel cell system 2 . The cooling circulation loop 60 is connected to the heat dissipation fan 6 , and the temperature is reduced by air cooling through the heat dissipation fan 6 .

[0037] The hydrogen fuel cell system 2 is also connected to a power source 7 and a load 8 located outside the environmental chamber 1. The power source 7 provides power for the operation of the hydrogen fuel cell system 2, and the load 8 can be an electronic load 8. By adjusting the loading current of the electronic load 8, the control of the electricity generation of the hydrogen fuel cell system 2 is achieved.

[0038] In this embodiment 1, a pressure regulating assembly is provided on the environmental chamber 1, and the pressure regulating assembly includes a vacuum pump group located outside the environmental chamber 1. The vacuum pump group 9 includes three vacuum pumps 9, and the three vacuum pumps 9 are connected in parallel. The three vacuum pumps 9 connected in parallel are respectively connected to the environmental chamber 1 and the tail exhaust tank 5, so that the air pressure of the environmental chamber 1 and the tail exhaust tank 5 are kept consistent. The pipeline connecting the vacuum pump 9 and the environmental chamber 1 is provided with an environmental chamber exhaust valve 10 for controlling the internal air pressure of the environmental chamber 1, and the pipeline connecting the vacuum pump 9 and the tail exhaust tank 5 is provided with a tail exhaust tank exhaust valve 11 for controlling the internal air pressure of the tail exhaust tank 5. The environmental chamber 1 is provided with an air inlet valve 12 connected to the internal space, which is used to supplement air to the interior of the environmental chamber 1 to ensure the normal operation of the hydrogen fuel cell system 2.

[0039] In addition, multiple pressure relief valves with different pressure relief thresholds are provided on the environmental chamber 1 and / or the tail discharge tank 5. Taking the tail discharge tank 5 as an example, Figure 1 As shown, the pressure relief valve can be an electric pressure relief valve 13 with a lower pressure relief threshold and a mechanical pressure relief valve 14 with a higher pressure relief threshold. When the internal pressure of the environmental chamber 1 and the tail tank 5 reaches the pressure relief threshold, the electric pressure relief valve 13 is activated to achieve the purpose of overpressure protection, and the mechanical pressure relief valve 14 can be activated when the electric pressure relief valve 13 fails, malfunctions or the pressure relief rate is insufficient, providing double protection for the environmental chamber 1 through the electric pressure relief valve 13 and the mechanical pressure relief valve 14.

[0040] The environmental chamber 1 and / or the tail discharge tank 5 are both provided with a hydrogen concentration protection component. Taking the environmental chamber 1 as an example, Figure 1 As shown, the hydrogen concentration protection component includes a plurality of hydrogen concentration sensors (not shown in the figure) arranged on the environmental chamber 1, and an exhaust valve 15, which is connected to an exhaust fan 16 for forcibly extracting the gas inside the environmental chamber 1. The plurality of hydrogen concentration sensors monitor the hydrogen concentration of the environmental chamber 1 in real time. Through the arrangement of the plurality of hydrogen concentration sensors, the environmental chamber 1 can set different alarm mechanisms according to different hydrogen concentrations inside, and when the hydrogen concentration inside the environmental chamber 1 reaches a preset alarm level, the exhaust fan 16 and the exhaust valve 15 are controlled to forcibly discharge the gas inside the environmental chamber 1 to ensure the safety of the environmental chamber 1. In addition, the hydrogen regulating valve 4 can be provided with a hydrogen inlet valve 18 for controlling the hydrogen supply. When the hydrogen concentration inside the environmental chamber 1 reaches a preset alarm level, the hydrogen inlet valve 18 can also be controlled to cut off the external hydrogen supply to prevent the hydrogen concentration inside the environmental chamber 1 from exceeding the safety standard.

[0041] The working process of the hydrogen fuel cell system air pressure simulation device of this embodiment is as follows:

[0042] According to the required air pressure in the environmental chamber 1, the rotation speed of the vacuum pump 9 is adjusted to extract the gas inside the environmental chamber 1 and the tail exhaust tank 5, and the internal air pressures of the environmental chamber 1 and the tail exhaust tank 5 are adjusted to the required air pressure, and the internal air pressures of the environmental chamber 1 and the tail exhaust tank 5 are kept consistent.

[0043] After the power source 7 and the load 8 are connected to the hydrogen fuel cell system 2, the hydrogen fuel cell system 2 is started. The opening of the hydrogen regulating valve 4 is controlled so that the externally supplied hydrogen enters the hydrogen fuel cell system 2 located in the environmental chamber 1 from the outside through the hydrogen inlet 21, and the air enters the hydrogen fuel cell system 2 through the air inlet 20 located inside the environmental chamber 1. The power source 7 provides energy and power for the operation of the hydrogen fuel cell system 2, so that the hydrogen fuel cell system 2 enters normal operation using the load 8, and according to the test requirements, the opening of the hydrogen regulating valve 4, the environmental chamber exhaust valve 10, the tail exhaust tank exhaust valve 11, and the air inlet valve 12 are controlled to maintain or adjust the current air pressure values ​​of the environmental chamber 1 and the tail exhaust tank 5, and perform a performance test on the hydrogen fuel cell system 2 in a low pressure environment.

[0044] During the operation of the hydrogen fuel cell system 2, the cooling fan 6 located in the environmental chamber 1 dissipates heat for the cooling circulation loop 60 of the hydrogen fuel cell system 2. The tail gas and tail liquid generated by the hydrogen fuel cell system 2 during operation are discharged into the tail tank 5 located outside the environmental chamber 1, and are discharged to the external atmosphere and drainage pipe respectively through the tail tank 5.

[0045] Example 2

[0046] like Figure 2 As shown, the difference between this embodiment 2 and embodiment 1 is that in this embodiment 2, the heat dissipation device of the hydrogen fuel cell system air pressure simulation device includes, in addition to the heat dissipation fan 6, a coolant device 17 located outside the environmental chamber 1, and a coolant pipeline located on the environmental chamber 1. The coolant pipeline is arranged on the chamber wall of the environmental chamber 1 and connected to the coolant device 17. The coolant pipeline is connected to the cooling circulation loop 60 of the hydrogen fuel cell system 2, so that the coolant of the coolant device 17 enters the cooling circulation loop 60. The coolant device 17 provides different cooling designs for the hydrogen fuel cell system 2, so that the hydrogen fuel cell system 2 can perform performance test experiments in low pressure environments under the cooperation of different cooling designs.

[0047] In summary, an embodiment of the utility model provides a hydrogen fuel cell system air pressure simulation device, which places the hydrogen fuel cell system 2 as a whole in an environmental chamber 1. The air inlet 20 and the exhaust outlet of the hydrogen fuel cell system 2 are both in a set low-pressure environment. The operation simulation of the hydrogen fuel cell system 2 is more accurate, and the environmental chamber 1 of the hydrogen fuel cell system air pressure simulation device has multiple safety protection designs and high safety, which can effectively ensure the safety of the test.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A hydrogen fuel cell system air pressure simulation device, characterized in that: It comprises an environmental chamber with an explosion-proof protective layer, the explosion-proof protective layer is grounded; a hydrogen fuel cell system connected to each other is placed in the environmental chamber, and an air inlet, a hydrogen inlet and a tail exhaust outlet are arranged on the hydrogen fuel cell system, wherein the air inlet is arranged in the environmental chamber, the hydrogen inlet extends to the outside of the environmental chamber, and the tail exhaust outlet is communicated with a tail exhaust tank located outside the environmental chamber; the hydrogen fuel cell system is also connected to a power source and a load located outside the environmental chamber; The environmental chamber is provided with a pressure regulating component, and the pressure regulating component includes a vacuum pump located outside the environmental chamber, and the vacuum pump is respectively connected to the environmental chamber and the tail exhaust tank to keep the air pressure of the environmental chamber consistent with that of the tail exhaust tank, and an environmental chamber exhaust valve for controlling the air pressure inside the environmental chamber is provided on the pipeline connecting the vacuum pump and the environmental chamber, and a tail exhaust tank exhaust valve for controlling the air pressure inside the tail exhaust tank is provided on the pipeline connecting the vacuum pump and the tail exhaust tank.

2. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The environmental chamber is provided with an air inlet valve communicated with the internal space.

3. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: A hydrogen regulating valve for controlling the flow rate of hydrogen is arranged on the pipeline extending from the hydrogen inlet to the outside of the environmental chamber.

4. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: There are multiple vacuum pumps, which are connected in parallel, and the multiple vacuum pumps connected in parallel are connected to the environmental chamber and the tail exhaust tank respectively.

5. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The air inlet is connected to an air filter for filtering particulate matter.

6. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The environmental chamber and / or the tail exhaust tank is provided with a hydrogen concentration protection component, which includes a plurality of hydrogen concentration sensors arranged on the environmental chamber, and an exhaust valve, wherein the exhaust valve is connected to an exhaust fan for extracting gas inside the environmental chamber.

7. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The environmental chamber and / or the tail exhaust tank are both provided with a plurality of pressure relief valves with different pressure relief thresholds.

8. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The hydrogen fuel cell system is connected to a heat dissipation fan located in the environmental chamber. A cooling circulation loop is provided in the hydrogen fuel cell system, and the cooling circulation loop is connected to the heat dissipation fan.

9. The hydrogen fuel cell system air pressure simulation device according to claim 1, characterized in that: The hydrogen fuel cell system is connected to a coolant device located outside the environmental chamber and a coolant pipeline located on the environmental chamber. The coolant pipeline is connected to the coolant device, and the coolant pipeline is connected to a cooling circulation loop of the hydrogen fuel cell system, so that the coolant of the coolant device enters the cooling circulation loop.

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