Hydrogen fuel cell test steady voltage hydrogen supply device

Abstract

The utility model relates to new energy technical field provides a kind of hydrogen fuel cell test voltage stabilizing hydrogen supply device, including hydrogen source, hydrogen gas supply pipeline, the first end of hydrogen gas supply pipeline is communicated with hydrogen source, and the end is used to communicate with hydrogen fuel cell;The first branch and second branch are provided in the side close to the end of hydrogen gas supply pipeline, the gas holder is provided on the first branch, the third pressure reducing valve is provided on the second branch, the end of the first branch and second branch confluence is provided with third gas pressure detection piece and third valve, the third gas pressure detection piece is close to the first branch and second branch setting, the third valve is away from the first branch and second branch setting.The utility model is provided with first branch on hydrogen gas supply pipeline, the gas holder is provided on the first branch, when hydrogen suddenly breaks off, the gas holder in the first branch can continue to supply gas for hydrogen fuel cell, and the problem that hydrogen pressure is insufficient into hydrogen fuel cell internal can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a hydrogen fuel cell testing and voltage stabilization hydrogen supply device. Background Technology

[0002] A hydrogen fuel cell is a device that directly converts chemical energy into electrical energy through the reverse reaction of water electrolysis, by oxidizing hydrogen at the anode and reducing oxygen at the cathode, with the help of a catalyst and a proton exchange membrane. The only product is water. It has the characteristics of high efficiency and zero emissions and is widely used in new energy vehicles, power generation and testing. Its stable operation depends on precise hydrogen pressure control and safety protection system.

[0003] To ensure the reliability and safety of hydrogen fuel cells and hydrogen fuel cell engines, they must undergo testing by a hydrogen fuel cell testing and voltage regulation hydrogen supply device before leaving the factory. For example... Figure 1 As shown, existing hydrogen fuel cell testing and pressure stabilization devices typically supply hydrogen directly to the hydrogen fuel cell or hydrogen fuel cell engine after a two-stage pressure reduction process from a hydrogen source. However, during hydrogen fuel cell testing, if the hydrogen supply is suddenly interrupted, the hydrogen supply pressure to the fuel cell drops sharply. The hydrogen fuel cell control system is unable to take protective measures in a short time, resulting in an increase in the internal pressure difference of the hydrogen fuel cell. This affects the proton exchange membrane and consequently impacts the test.

[0004] Therefore, this utility model application proposes a hydrogen fuel cell testing and voltage stabilization hydrogen supply device to solve the above-mentioned problems. Utility Model Content

[0005] In view of this, the present invention provides a hydrogen fuel cell testing and stabilizing hydrogen supply device to solve the technical problem that the hydrogen supply is suddenly cut off during the testing process of the existing hydrogen fuel cell testing and stabilizing hydrogen supply device, resulting in insufficient instantaneous pressure and damage to the hydrogen fuel cell.

[0006] In a first aspect, this utility model provides a hydrogen fuel cell testing and pressure stabilization hydrogen supply device, comprising: a hydrogen source and a hydrogen supply pipeline, wherein the first end of the hydrogen supply pipeline is connected to the hydrogen source and the last end is connected to the hydrogen fuel cell; the hydrogen supply pipeline is provided with a first branch and a second branch near the last end, a gas storage tank is provided on the first branch, a third pressure reducing valve is provided on the second branch, and a third pressure detection element and a third valve are provided at the end where the first branch and the second branch converge, wherein the third pressure detection element is located near the first branch and the second branch, and the third valve is located away from the first branch and the second branch.

[0007] Preferably, a second pressure reducing valve is provided on the hydrogen supply pipeline between the hydrogen source and the diversion section, and a first pressure detection element and a second pressure detection element are respectively provided at both ends of the second pressure reducing valve.

[0008] Preferably, a first pressure reducing valve is installed on the hydrogen supply pipeline between the hydrogen source and the second pressure reducing valve.

[0009] Preferably, a first exhaust branch and a first valve are provided on the hydrogen supply pipeline between the first pressure reducing valve and the second pressure reducing valve. The first exhaust branch is located on the side closer to the first pressure reducing valve, and the first valve is located on the side closer to the second pressure reducing valve. A first vent valve is provided on the first exhaust branch.

[0010] Preferably, a filter is provided on the hydrogen supply line between the first valve and the first pressure detection element.

[0011] Preferably, a second valve and a second exhaust branch are provided on the hydrogen supply pipeline between the second pressure detection element and the diversion section. The second valve is located near the second pressure detection element, and the second exhaust branch is located near the diversion section. A second vent valve is provided on the second exhaust branch.

[0012] Preferably, a flow meter is installed on the hydrogen supply pipeline between the second valve and the second exhaust branch.

[0013] Preferably, the second branch is provided with a third exhaust branch, which is located between the third pressure reducing valve and the third air pressure detection element, and a third vent valve is provided on the third exhaust branch.

[0014] Preferably, the second branch is further provided with a fourth valve, which is located on the pipeline between the third pressure reducing valve and the third exhaust branch. The pipeline between the third exhaust branch and the third pressure detection element is connected to the third branch, and the end of the third branch is connected to a nitrogen source.

[0015] Preferably, the third branch is provided with a fourth exhaust branch, a fourth pressure detection device and a nitrogen supply valve. The nitrogen supply valve is located near the second branch, the fourth exhaust branch is located near the nitrogen source, and the fourth pressure detection device is located on the pipeline between the nitrogen supply valve and the fourth exhaust branch.

[0016] Preferably, the gas storage tank is provided with a high-pressure buffer chamber and a low-pressure stabilizing chamber, which are connected by a proportional regulating valve; the inlet of the low-pressure stabilizing chamber is connected to a hydrogen source through a hydrogen supply pipeline, and the outlet is connected to a hydrogen fuel cell through a hydrogen supply pipeline.

[0017] Beneficial effects: Compared with existing technologies, this application provides a hydrogen fuel cell testing and pressure stabilization hydrogen supply device, comprising: a hydrogen source and a hydrogen supply pipeline. The first end of the hydrogen supply pipeline is connected to the hydrogen source, and the second end is connected to the hydrogen fuel cell. The hydrogen supply pipeline has a first branch and a second branch near its end. A gas storage tank is installed on the first branch, and a third pressure reducing valve is installed on the second branch. A third pressure detection device and a third valve are installed at the confluence of the first and second branches. The third pressure detection device is located close to the first and second branches, while the third valve is located away from the first and second branches. This technical solution, by setting a first branch on the hydrogen supply pipeline and installing a gas storage tank on the first branch, ensures that when hydrogen supply is suddenly interrupted, the gas storage tank in the first branch can continue to supply hydrogen to the hydrogen fuel cell, thus avoiding the problem of insufficient hydrogen pressure entering the hydrogen fuel cell. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a schematic diagram of a hydrogen fuel cell testing and voltage stabilization hydrogen supply device in the prior art. Figure 2 This is a schematic diagram of the structure of a hydrogen fuel cell testing and voltage stabilization hydrogen supply device in one embodiment of the present invention; Figure 3 This is a schematic diagram of the hydrogen fuel cell testing and voltage stabilization hydrogen supply device in another embodiment of the present invention; Figure 4 This is a schematic diagram of the hydrogen fuel cell testing and voltage stabilization hydrogen supply device in another embodiment of the present invention.

[0020] Parts and their numbers in the diagram: 1. Hydrogen supply pipeline; 10. First branch; 100. Gas storage tank; 101. Inlet valve; 102. Outlet valve; 11. Second branch; 110. Third exhaust branch; 1100. Third vent valve; 111. Third pressure reducing valve; 112. Third branch; 1120. Fourth exhaust branch; 1121. Nitrogen supply valve; 1122. Fourth pressure detection device; 113. Fourth valve; 12. Main valve; 13. First pressure reducing valve 14. Valve; 15. First valve; 16. Filter; 17. Second pressure reducing valve; 18. First pressure detection device; 19. Second pressure detection device; 2. Second exhaust branch; 20. First vent valve; 200. Backup pipeline; 201. Backup valve; 202. Backup hydrogen source; 3. Second exhaust branch; 30. Second vent valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0022] Please see Figures 2 to 4This utility model provides a hydrogen fuel cell testing and pressure stabilization hydrogen supply device, including: a hydrogen source and a hydrogen supply pipeline 1. The first end of the hydrogen supply pipeline 1 is connected to the hydrogen source, and the last end is connected to the hydrogen fuel cell. A first branch 10 and a second branch 11 are provided near the last end of the hydrogen supply pipeline 1. A gas storage tank 100 is provided on the first branch 10, and a third pressure reducing valve 111 is provided on the second branch 11. A third pressure detection element 190 and a third valve 19 are provided at the end where the first branch 10 and the second branch 11 meet. The third pressure detection element 190 is located near the first branch 10 and the second branch 11, and the third valve 19 is located away from the first branch 10 and the second branch 11.

[0023] In this embodiment, a hydrogen source is used to provide hydrogen for hydrogen fuel cell testing. A hydrogen supply line 1 is used to transport hydrogen; the first end of the hydrogen supply line 1 refers to the end connected to the hydrogen source, and the last end refers to the end connected to the hydrogen fuel cell. A first branch 10 is used to connect to a gas storage tank 100 to supply hydrogen to the hydrogen fuel cell, and a second branch 11 is used to supply hydrogen to the hydrogen fuel cell. A third pressure detection element 190 is used to monitor whether the pressure of the hydrogen entering the hydrogen fuel cell meets the design requirements. A third valve 19 is used to control the on / off state of the hydrogen entering the hydrogen fuel cell. Specifically, the third pressure detection element 190 can be a pressure gauge, and the third valve 19 can be a diaphragm valve.

[0024] In the above embodiment, a main valve 12 is also provided at the connection between the hydrogen source and the hydrogen supply pipeline 1. The main valve 12 is used to control the supply of hydrogen.

[0025] In practical use, the second branch 11 can be shut off, and the first branch 10 can be used as the hydrogen fuel cell. When the hydrogen supply is suddenly interrupted, the gas storage tank 100 in the first branch 10 can continue to supply gas to the hydrogen fuel cell, avoiding the problem of insufficient hydrogen pressure inside the fuel cell. When the first branch 10 malfunctions, it can be shut off, and the second branch 11 can be opened to continue supplying gas to the hydrogen fuel cell. Alternatively, the gas storage tank 100 in the first branch 10 can be filled with gas and reach a preset pressure value, then the first branch 10 can be shut off, and the second branch 11 can be used to supply gas to the hydrogen fuel cell. When the hydrogen supply is suddenly interrupted, the second branch 11 can be shut off, and the first branch 10 can be opened to continue supplying gas to the fuel cell, avoiding the problem of insufficient hydrogen pressure inside the fuel cell. Alternatively, the first branch 10 and the second branch 11 can be opened simultaneously to supply gas to the hydrogen fuel cell. When the hydrogen supply is suddenly cut off, the second branch 11 is closed, and the first branch 10 continues to supply gas to the hydrogen fuel cell, which can avoid the problem of insufficient hydrogen pressure inside the hydrogen fuel cell.

[0026] In the above embodiments, it is preferable to adopt a gas supply scheme of closing the second branch 11 and opening the first branch 10, with the second branch 11 used as a backup branch.

[0027] Please see Figures 2 to 4 In one embodiment, a second pressure reducing valve 16 is provided on the hydrogen supply pipeline 1 between the hydrogen source and the diversion section, and a first pressure detection element 160 and a second pressure detection element 161 are respectively provided at both ends of the second pressure reducing valve 16.

[0028] It should be noted that the hydrogen supplied by the hydrogen source is usually high-pressure hydrogen, which cannot be directly supplied to the hydrogen fuel cell. Therefore, in this embodiment, a second pressure reducing valve 16 is used to reduce the hydrogen supplied by the hydrogen source to a pressure that meets the design requirements, ensuring that the corresponding hydrogen fuel cell can be tested normally. The shunt section refers to the pipeline section where the first branch 10 and the second branch 11 are located. The first pressure detection element 160 is used to detect the hydrogen pressure before passing through the second pressure reducing valve 16, and the second pressure detection element 161 is used to detect the pressure after passing through the second pressure reducing valve 16.

[0029] In the above embodiment, the hydrogen in the hydrogen supply pipeline 1 can have its pressure reduced to the required pressure value after passing through the second pressure reducing valve 16, which can ensure the normal testing of the hydrogen fuel cell.

[0030] Please see Figures 2 to 4 In one embodiment, a first pressure reducing valve 13 is provided on the hydrogen supply pipeline 1 between the hydrogen source and the second pressure reducing valve 16.

[0031] In this embodiment, the first pressure reducing valve 13 and the second pressure reducing valve 16 have the same function, which is to reduce the pressure of the hydrogen provided by the hydrogen source to the pressure value that meets the design requirements. Through the cooperation of the first pressure reducing valve 13 and the second pressure reducing valve 16, the two-stage pressure reduction can reduce the pressure provided by the hydrogen source to the pressure value that meets the actual test requirements.

[0032] Please see Figures 2 to 4 In one embodiment, a first exhaust branch 2 and a first valve 14 are provided on the hydrogen supply pipeline 1 between the first pressure reducing valve 13 and the second pressure reducing valve 16. The first exhaust branch 2 is located on the side closer to the first pressure reducing valve 13, and the first valve 14 is located on the side closer to the second pressure reducing valve 16. A first vent valve 20 is provided on the first exhaust branch 2.

[0033] In this embodiment, the first exhaust branch 2 is used to discharge hydrogen gas that does not meet the pressure requirements after passing through the first pressure reducing valve 13, and to discharge gas from the hydrogen source into the first valve 14. For example, Figure 2As shown, the hydrogen fuel cell test pressure stabilization and hydrogen supply device is directly connected to the hydrogen fuel cell. When air is present in the pipeline, the oxygen in the air mixed with hydrogen during the test may easily cause an explosion. Therefore, the oxygen in the pipeline needs to be purged before hydrogen is introduced. During hydrogen supply, the first valve 14 is closed and the first vent valve 20 is opened to purge the air from the hydrogen source to the section from the first valve 14. Hydrogen that does not meet the pressure requirements after passing through the first pressure reducing valve 13 can also be purged by closing the first valve 14 and opening the first vent valve 20. Specifically, the first valve 14 can be a diaphragm valve.

[0034] Please see Figures 2 to 4 In one embodiment, a filter 15 is provided on the hydrogen supply line 1 between the first valve 14 and the first pressure detection element 160.

[0035] It should be noted that a hydrogen fuel cell includes a proton exchange membrane and a catalyst. The proton exchange membrane is a precision structure, typically only micrometers thick, while the catalyst particles are typically nanometers in diameter. If the hydrogen contains solid impurities, such as dust from the gas source, it can directly clog the membrane pores or wear down the catalyst surface, affecting power generation efficiency. Therefore, in this embodiment, a filter 15 is used to remove solid particles, moisture, and chemical impurities from the hydrogen, protecting the internal membrane electrode assembly and catalyst of the hydrogen fuel cell from contamination and wear, while also preventing impurities from damaging the precision valves in the hydrogen supply pipeline.

[0036] Please see Figures 2 to 4 In one embodiment, a second valve 17 and a second exhaust branch 3 are provided on the hydrogen supply pipeline 1 between the second pressure detection element 161 and the diversion section. The second valve 17 is located near the second pressure detection element 161, and the second exhaust branch 3 is located near the diversion section. A second vent valve 30 is provided on the second exhaust branch 3.

[0037] In this embodiment, the second exhaust branch 3 is used to exhaust air from the hydrogen source to the diversion section, and to remove hydrogen whose pressure still does not meet design requirements after passing through the second pressure reducing valve 16; it can also exhaust hydrogen flowing back from the diversion section. For example, when the hydrogen source is supplying gas, closing the inlet valve 101 of the first branch 10 and the third pressure reducing valve 111 of the second branch 11, and opening the second vent valve 30, allows air from the hydrogen source to the diversion section to be exhausted through the second exhaust branch 3. Closing the second valve 17 and opening the second vent valve 30 allows hydrogen flowing back from the diversion section to be exhausted.

[0038] Please see Figures 2 to 4 In one embodiment, a flow meter 18 is installed on the hydrogen supply pipeline 1 between the second valve 17 and the second exhaust branch 3.

[0039] It should be noted that existing hydrogen fuel cell testing and pressure stabilization devices typically only detect the hydrogen pressure and maintain its stability by adjusting the pressure. However, stable hydrogen pressure does not equate to stable flow rate. If the hydrogen fuel cell load changes and more hydrogen is needed, relying solely on pressure regulation can result in situations where the hydrogen pressure is adequate but the flow rate is insufficient, such as when the hydrogen velocity within the pipeline is too low. Therefore, in this embodiment, the flow meter 18 provides real-time flow data feedback, overcoming the limitations of relying solely on pressure control. This prevents membrane electrode damage or catalyst failure caused by abnormal hydrogen flow, further improving the safety and reliability of the hydrogen fuel cell testing and pressure stabilization device.

[0040] Please see Figures 2 to 4 In one embodiment, the second branch 11 is provided with a third exhaust branch 110, which is located between the third pressure reducing valve 111 and the third air pressure detection element 190, and a third vent valve 1100 is provided on the third exhaust branch 110.

[0041] In this embodiment, the third exhaust branch 110 is used to exhaust gas from the pipes of the first branch 10 and / or the second branch 11. For example, when hydrogen from the hydrogen source flows to the split section, the third valve 19 is closed and the third vent valve 1100 is opened. The valves of the first branch 10 and the second branch 11 can then exhaust the gas from their pipes through the third exhaust branch 110. Specifically, the third pressure detection element 190 can be a pressure gauge.

[0042] Please see Figures 2 to 4 In one embodiment, the second branch 11 is further provided with a fourth valve 113, which is located on the pipeline between the third pressure reducing valve 111 and the third exhaust branch 110. The pipeline between the third exhaust branch 110 and the third pressure detection element 190 is connected to the third branch 112, and the end of the third branch 112 is connected to a nitrogen source.

[0043] In this embodiment, the fourth valve 113 is used to prevent nitrogen backflow. An outlet valve 102 is also provided at the output end of the gas storage tank 100 to prevent nitrogen from flowing into the gas storage tank 100. The third branch 112 is used to supply nitrogen, which is used to vent air from the hydrogen fuel cell. Specifically, the fourth valve 113 can be a diaphragm valve.

[0044] Please see Figures 2 to 4In one embodiment, the third branch 112 is provided with a fourth exhaust branch 1120, a fourth pressure detection element 1122 and a nitrogen supply valve 1121. The nitrogen supply valve 1121 is located near the second branch 11, the fourth exhaust branch 1120 is located near the nitrogen source, and the fourth pressure detection element 1122 is located on the pipeline between the nitrogen supply valve 1121 and the fourth exhaust branch 1120.

[0045] In this embodiment, the nitrogen supply valve 1121 is used to open or close the third branch 112. The fourth exhaust branch 1120 is used to exhaust the gas in the third branch 112. The fourth pressure detection element 1122 is used to detect the nitrogen pressure during nitrogen supply. Specifically, the fourth pressure detection element 1122 can be a pressure gauge.

[0046] In the above embodiment, through the cooperation of the gas supply valve, the fourth gas pressure detection element 1122, the fourth valve 113, the third gas pressure detection element 190, the third valve 19 and the gas outlet valve 102, stable nitrogen gas can be introduced into the hydrogen fuel cell to exhaust the air inside the hydrogen fuel cell.

[0047] Please see Figures 2 to 4 In one embodiment, the gas storage tank 100 is provided with a high-pressure buffer chamber and a low-pressure stabilizing chamber, which are connected by a proportional regulating valve; the inlet of the low-pressure stabilizing chamber is connected to a hydrogen source through a hydrogen supply pipeline 1, and the outlet is connected to a hydrogen fuel cell through a hydrogen supply pipeline 1.

[0048] In this embodiment, the high-pressure buffer chamber is used to store spare hydrogen, and the low-pressure chamber is used to directly supply hydrogen. When the pressure in the low-pressure chamber is insufficient, the proportional valve slowly replenishes the gas, which can avoid the impact of pressure change on the membrane electrode of the hydrogen fuel cell.

[0049] Furthermore, in the above embodiment, one end of the high-pressure buffer chamber is provided with a connection port, which is connected to the backup hydrogen source 202 via a backup pipe 200. A backup valve 201 is also provided on the backup pipe 200.

[0050] In the above embodiment, the backup hydrogen source 202 can supply hydrogen to the high-pressure buffer chamber. The backup valve 201 is used to control the opening and closing of the backup pipeline 200. When the backup valve 201 is open, it can supply hydrogen to the high-pressure buffer chamber. When the backup valve 201 is closed, it can cut off the hydrogen supply from the backup hydrogen source 202 to the high-pressure buffer chamber.

[0051] The gas supply process of the hydrogen fuel cell test voltage stabilization hydrogen supply device is as follows: Please see Figure 4In practical use, this hydrogen fuel cell test and voltage stabilization hydrogen supply device is used to test various performance parameters of the hydrogen fuel cell. Before testing, the air in the pipeline and the hydrogen fuel cell is purged, and then the hydrogen supply is connected and stabilized before the test is conducted.

[0052] Specifically, the exhaust process is as follows: Nitrogen venting stage: Standby valve 201, third valve 19, proportional regulating valve in gas storage tank 100, third vent valve 1100, second vent valve 30, valves on fourth vent branch 1120, and main valve 12 are closed; nitrogen supply valve 1121, outlet valve 102, inlet valve 101, fourth valve 113, first valve 14, second valve 17, and first vent valve 20 are opened, and nitrogen is used to vent the air in the hydrogen supply pipeline and low-pressure stabilization chamber through the first vent branch 2. After venting for a preset time, the first vent valve 20, fourth valve 113, and outlet valve 102 are closed, and the third vent valve 1100 is opened. The nitrogen pressure is observed through the fourth pressure detection device 1122. After the pressure stabilizes and meets the preset pressure, the third valve 19 is opened and the third vent valve 1100 is closed, and the air in the hydrogen fuel cell is vented through nitrogen. After venting for a preset time, the nitrogen supply is turned off and the third valve 19 is closed.

[0053] Hydrogen exhaust stage: Close the third valve 19, the first vent valve 20, the second vent valve 30, and the nitrogen supply valve 1121; open the first valve 14, the second valve 17, the inlet valve 101, the outlet valve 102, the fourth valve 113, and the third vent valve 1100 to exhaust the nitrogen in the pipeline through the third exhaust branch 110; after exhausting for a preset time, close the fourth valve 113, observe the hydrogen pressure through the second pressure detection device 161, and after the pressure stabilizes, close the third vent valve 1100 and open the third valve 19 to allow hydrogen to enter the hydrogen fuel cell.

[0054] Testing phase: Hydrogen gas is observed through the third pressure detection device 190. The test is conducted after the hydrogen gas pressure stabilizes.

[0055] In summary, a hydrogen fuel cell testing and stabilizing hydrogen supply device according to an embodiment of this application includes a hydrogen source and a hydrogen supply pipeline 1. The first end of the hydrogen supply pipeline 1 is connected to the hydrogen source, and the last end is connected to the hydrogen fuel cell. A first branch 10 and a second branch 11 are provided near the last end of the hydrogen supply pipeline 1. A gas storage tank 100 is provided on the first branch 10, and a third pressure reducing valve 111 is provided on the second branch 11. A third pressure detection element 190 and a third valve 19 are provided at the end where the first branch 10 and the second branch 11 meet. The third pressure detection element 190 is located near the first branch 10 and the second branch 11, and the third valve 19 is located away from the first branch 10 and the second branch 11. This technical solution involves setting a first branch 10 on the hydrogen supply pipeline 1, with a gas storage tank 100 installed on the first branch 10. When the hydrogen supply is suddenly interrupted, the gas storage tank 100 in the first branch 10 can continue to supply gas to the hydrogen fuel cell, thus avoiding the problem of insufficient hydrogen pressure entering the hydrogen fuel cell.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydrogen fuel cell testing and voltage stabilization hydrogen supply device, characterized in that, include: The system includes a hydrogen source and a hydrogen supply pipeline. The first end of the hydrogen supply pipeline is connected to the hydrogen source, and the last end is connected to a hydrogen fuel cell. The hydrogen supply pipeline has a first branch and a second branch near the last end. A gas storage tank is installed on the first branch, and a third pressure reducing valve is installed on the second branch. A third pressure detection device and a third valve are installed at the end where the first and second branches meet. The third pressure detection device is located close to the first and second branches, and the third valve is located away from the first and second branches.

2. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 1, characterized in that, A second pressure reducing valve is installed on the hydrogen supply pipeline between the hydrogen source and the diversion section, and a first pressure detection element and a second pressure detection element are respectively installed at both ends of the second pressure reducing valve.

3. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 2, characterized in that, A first pressure reducing valve is installed on the hydrogen supply pipeline between the hydrogen source and the second pressure reducing valve.

4. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 3, characterized in that, A first exhaust branch and a first valve are provided on the hydrogen supply pipeline between the first pressure reducing valve and the second pressure reducing valve. The first exhaust branch is located on the side closer to the first pressure reducing valve, and the first valve is located on the side closer to the second pressure reducing valve. A first vent valve is provided on the first exhaust branch.

5. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 4, characterized in that, A filter is installed on the hydrogen supply line between the first valve and the first pressure detection element.

6. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 5, characterized in that, A second valve and a second exhaust branch are installed on the hydrogen supply pipeline between the second pressure detection element and the diversion section. The second valve is located near the second pressure detection element, and the second exhaust branch is located near the diversion section. A second vent valve is installed on the second exhaust branch. A flow meter is installed on the hydrogen supply pipeline between the second valve and the second exhaust branch.

7. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 1, characterized in that, The second branch is provided with a third exhaust branch, which is located between the third pressure reducing valve and the third air pressure detection element, and a third vent valve is provided on the third exhaust branch.

8. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 7, characterized in that, The second branch is also equipped with a fourth valve, which is located on the pipeline between the third pressure reducing valve and the third exhaust branch. The pipeline between the third exhaust branch and the third pressure detection element is connected to the third branch, and the end of the third branch is connected to a nitrogen source.

9. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 8, characterized in that, The third branch is equipped with a fourth exhaust branch, a fourth pressure detection device, and a nitrogen supply valve. The nitrogen supply valve is located near the second branch, the fourth exhaust branch is located near the nitrogen source, and the fourth pressure detection device is located on the pipeline between the nitrogen supply valve and the fourth exhaust branch.

10. The hydrogen fuel cell testing and voltage stabilization hydrogen supply device according to claim 1, characterized in that, The gas storage tank is equipped with a high-pressure buffer chamber and a low-pressure stabilizing chamber, which are connected by a proportional regulating valve. The inlet of the low-pressure stabilizing chamber is connected to a hydrogen source through a hydrogen supply pipeline, and the outlet is connected to a hydrogen fuel cell through a hydrogen supply pipeline.

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