Hydrogen fuel power system and vehicle

Abstract

The invention discloses a hydrogen fuel power system and a vehicle, and relates to the technical field of vehicle power systems. The hydrogen fuel power system comprises an engine and a circulating mechanism, the engine comprises a crankcase and a cylinder cover, a circulating outlet is formed in the side wall of the crankcase, the cylinder cover is arranged on the crankcase, and the cylinder cover is connected with an intake manifold; the circulating mechanism comprises an electrolytic bath and a liquid-gas separation box, the liquid-gas separation box comprises a liquid-gas inlet and a liquid outlet, the electrolytic bath comprises a first inlet, a gas return port and an oil return port, the liquid-gas inlet is communicated with the circulating outlet, the liquid outlet is communicated with the first inlet, the electrolytic bath is configured to electrolyze water in liquid, the gas return port is communicated with the intake manifold, and the oil return port is communicated with the liquid outlet. And the oil return port is communicated with the crankcase through an oil return pipe. According to the hydrogen fuel power system, water and engine oil discharged from the side wall of the crankcase can be separated and recycled, the engine oil in the crankcase can be prevented from being emulsified, and engine oil loss and environment pollution can be avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle power system technology, and more particularly to a hydrogen fuel cell power system and vehicle. Background Technology

[0002] In existing technologies, hydrogen is increasingly being used to protect the environment and ensure energy sustainability, including in hydrogen fuel cell engines. However, because piston rings cannot completely seal, water vapor produced by combustion in hydrogen fuel cell engines can enter the crankcase through the gap between the piston rings and cylinder liners.

[0003] Existing technologies typically use vent holes on the side wall of the crankcase to expel water vapor and prevent oil emulsification. However, oil vapor and oil ejected by the crankshaft can easily leak through the vent holes, causing oil loss and environmental pollution. Summary of the Invention

[0004] The purpose of this invention is to propose a hydrogen fuel cell power system and vehicle that can separate and recycle water and engine oil discharged through the side wall of the crankcase, thereby avoiding oil emulsification in the crankcase and preventing oil loss and environmental pollution.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A hydrogen fuel cell power system, comprising:

[0007] An engine, including a crankcase and a cylinder head, wherein the side wall of the crankcase is provided with a circulation outlet, the cylinder head is disposed in the crankcase, and the cylinder head is connected to an intake manifold;

[0008] The circulation mechanism includes an electrolytic cell and a liquid-gas separator. The liquid-gas separator includes a liquid-gas inlet and a liquid outlet. The electrolytic cell includes a first inlet, a return gas port, and an oil return port. The liquid-gas inlet is connected to the circulation outlet, and the liquid outlet is connected to the first inlet. The electrolytic cell is configured to electrolyze water in the liquid. The return gas port is connected to the intake manifold, and the oil return port is connected to the crankcase via an oil return pipe.

[0009] As an alternative to the aforementioned hydrogen fuel cell power system, the engine further includes a cylinder liner, which is disposed within the crankcase. The bottom of the cylinder liner communicates with the interior of the crankcase, and a discharge port is provided on the side wall of the cylinder liner, which communicates with the recirculation outlet.

[0010] As an alternative to the aforementioned hydrogen fuel cell power system, the inner wall of the cylinder liner is provided with a liquid baffle ring, and the liquid on the liquid baffle ring can be discharged through the discharge port.

[0011] As an alternative to the aforementioned hydrogen fuel cell power system, the liquid baffle ring is connected to an upwardly extending annular baffle wall, the annular baffle wall being spaced apart from the inner wall of the cylinder liner, and the top surface of the annular baffle wall being higher than the lowest point of the discharge port.

[0012] As an alternative to the aforementioned hydrogen fuel cell power system, the liquid-gas separator further includes a gas outlet. The liquid-gas mixture inside the liquid-gas separator has an oil-water level, with the liquid outlet below the oil-water level and the gas outlet above the oil-water level.

[0013] As an alternative to the aforementioned hydrogen fuel cell power system, the hydrogen fuel cell power system further includes an oil-gas separator, and the electrolyzer further includes a second inlet. The oil-gas separator is connected to the gas outlet, and the oil-gas separator is configured to separate oil vapor and water vapor in the gas discharged from the gas outlet. The oil vapor is liquefied and then enters the electrolyzer through the second inlet.

[0014] As an alternative to the aforementioned hydrogen fuel cell power system, the liquid-gas separator is provided with multiple isolation plates, which are alternately connected to two opposite side walls of the liquid-gas separator.

[0015] As an alternative to the aforementioned hydrogen fuel power system, the end of the liquid-gas separator away from the liquid-gas inlet is sunken to form a drain tank, and the liquid outlet is connected to the drain tank.

[0016] As an optional solution for the aforementioned hydrogen fuel cell power system, the electrolyzer includes a cathode electrolyzer, an anode electrolyzer, and a partition. The partition divides the electrolyzer into a cathode electrolyzer chamber and an anode electrolyzer chamber. The partition is spaced apart from the bottom of the electrolyzer so that the cathode electrolyzer chamber and the anode electrolyzer chamber are connected. The liquid in the electrolyzer is layered and has an oil-water interface, which is higher than the bottom of the partition.

[0017] As an alternative to the aforementioned hydrogen fuel cell power system, the partition plate has a connecting hole, which is higher than the oil-water interface.

[0018] As an alternative to the aforementioned hydrogen fuel power system, the height of the oil return port is higher than that of the connecting hole.

[0019] As an optional solution for the aforementioned hydrogen fuel cell power system, the return gas port includes a first return gas port and a second return gas port. The first return gas port is connected to the cathode electrolysis chamber, and the second return gas port is connected to the anode electrolysis chamber. Both the first return gas port and the second return gas port are connected to the intake manifold.

[0020] A vehicle including the aforementioned hydrogen fuel cell power system.

[0021] The beneficial effects of this invention are:

[0022] This invention provides a hydrogen fuel cell power system and vehicle. In this hydrogen fuel cell power system, the crankcase of the engine is provided with a circulation outlet. The oil, oil vapor, water, and a liquid-gas mixture formed by water vapor in the crankcase can enter the circulation mechanism through the circulation outlet. The liquid-gas separator can separate the liquid-gas mixture into an oil-gas mixture and an oil-water mixture. The liquid oil-water mixture can enter the electrolysis cell through the liquid outlet. The water in the oil-water mixture is electrolyzed, and the hydrogen and oxygen formed enter the intake manifold and can be reused as fuel. The oil in the oil-water mixture can return to the crankcase through the oil return pipe.

[0023] This hydrogen fuel cell power system can separate and recycle water and oil discharged through the side wall of the crankcase, which can prevent oil emulsification in the crankcase and avoid oil loss and environmental pollution. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a hydrogen fuel cell power system provided in one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 This is a partial cross-sectional view of a liquid-gas separator provided in one embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of an electrolytic cell provided in one embodiment of the present invention.

[0028] In the picture:

[0029] 1. Engine; 11. Crankcase; 111. Circulation outlet; 112. Crankcase chamber; 12. Cylinder head; 13. Intake manifold; 14. Piston; 15. Connecting rod; 16. Cylinder liner; 161. Exhaust port; 162. Fluid retaining ring; 163. Annular retaining wall;

[0030] 2. Circulation mechanism; 21. Liquid-gas separator; 211. Liquid-gas inlet; 212. Liquid outlet; 213. Gas outlet; 214. Isolation plate; 215. Drainage tank; 22. Electrolytic cell; 221. First inlet; 222. First return gas port; 223. Second return gas port; 224. Oil return port; 225. Second inlet; 226. Baffle plate; 2261. Connecting hole; 2271. Cathode electrolytic element; 2272. Anode electrolytic element; 228. Oil-water interface; 229. Drainage port; 23. Oil-gas separator; 24. Pressure sensor; 25. Controller; 26. Check valve. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0033] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0034] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] This embodiment provides a vehicle including a body, wheels, and a power system. The wheels are mounted on the body, and the power system drives the wheels to rotate, thereby moving the vehicle. To protect the environment and ensure energy sustainability, hydrogen is increasingly being used, including in hydrogen fuel cell engines.

[0037] This embodiment also provides a hydrogen fuel cell power system (hereinafter referred to as the power system). Figure 1 As shown, the power system includes an engine 1, which includes a crankcase 11, a cylinder head 12, and an oil pan. The cylinder head 12 and the oil pan are both mounted on the crankcase 11. The oil pan and the crankcase 11 together form a crankshaft chamber 112. A crankshaft and a piston 14 are mounted inside the crankshaft chamber 112. The crankshaft is connected to the piston 14 via a connecting rod 15. The cylinder head 12 is connected to an intake manifold 13. When hydrogen and oxygen enter the combustion chamber through the intake manifold 13 and are ignited, they can push the piston 14 to move, thereby causing the piston 14 to drive the crankshaft to rotate and output power.

[0038] To ensure the sealing of piston 14, engine 1 also includes cylinder liner 16, which is disposed inside crankcase 11. The bottom of cylinder liner 16 is connected to the inside of crankcase 11. Piston 14 is slidably disposed inside cylinder liner 16. Piston 14 ring is sleeved on the outer periphery of piston 14. Piston 14 ring is elastic. Through the compression between piston 14 and cylinder liner 16, piston 14 and the inner wall of cylinder liner 16 are sealed.

[0039] However, because the piston ring 14 cannot completely seal, water vapor produced by the combustion of the hydrogen fuel cell engine 1 can enter the crankcase 11 through the gap between the piston ring 14 and the cylinder liner 16. Existing technology generally uses exhaust ports on the side wall of the crankcase 11 to expel the water vapor and prevent oil emulsification. However, oil vapor and oil blown off the crankshaft can easily leak through the exhaust ports, causing oil loss and environmental pollution.

[0040] like Figures 1-4 As shown, to solve the above problems, the power system provided in this embodiment also includes a circulation mechanism 2. The side wall of the crankcase 11 is provided with a circulation outlet 111. The circulation mechanism 2 includes an electrolytic cell 22 and a liquid-gas separator 21. The liquid-gas separator 21 includes a liquid-gas inlet 211 and a liquid outlet 212. The electrolytic cell 22 includes a first inlet 221, a return gas port and an oil return port 224. The liquid-gas inlet 211 is connected to the circulation outlet 111, and the liquid outlet 212 is connected to the first inlet 221. The electrolytic cell 22 is configured to electrolyze water in the liquid. The return gas port is connected to the intake manifold 13, and the oil return port 224 is connected to the crankcase 11 through an oil return pipe.

[0041] In this power system, the crankcase 11 of the engine 1 is provided with a circulation outlet 111. The oil, oil vapor, water and water vapor in the crankcase 11 can enter the circulation mechanism 2 through the circulation outlet 111. The liquid-gas separator 21 can separate the liquid-gas mixture into an oil-gas mixture and an oil-water mixture. The liquid oil-water mixture can enter the electrolysis tank 22 through the liquid outlet 212. The water in the oil-water mixture will be electrolyzed, and the hydrogen and oxygen formed will enter the intake manifold 13 and can be reused as fuel. The oil in the oil-water mixture can re-enter the crankcase 11 through the oil return pipe.

[0042] This power system can separate and recycle water and engine oil discharged through the side wall of the crankcase 11, which can prevent oil emulsification in the crankcase 11 and avoid oil loss and environmental pollution. At the same time, by electrolyzing the separated water, hydrogen can be replenished, improving the energy efficiency of the power system and reducing costs.

[0043] like Figure 2 As shown, the cylinder liner 16 has a drain port 161 on its side wall, which is connected to the circulation outlet 111. It is understood that as the engine 1 is in use, the water vapor produced by combustion may adhere to the inner wall of the cylinder liner 16, forming liquid water. This water flows downwards along the inner wall of the cylinder liner 16 and can be discharged through the drain port 161 and the circulation outlet 111, thereby preventing liquid water from dripping into the engine oil and preventing oil emulsification.

[0044] Preferably, the inner wall of the cylinder liner 16 is provided with a baffle ring 162, and the liquid on the baffle ring 162 can be discharged through the drain port 161. The baffle ring 162 can block the water flowing down the inner wall of the cylinder and make the water flow along the baffle ring 162 to the drain port 161 for discharge, further increasing the amount of water discharged from the drain port 161 and effectively preventing liquid water from dripping into the engine oil.

[0045] Furthermore, the baffle ring 162 is connected to an upwardly extending annular baffle wall 163. The annular baffle wall 163 is spaced apart from the inner wall of the cylinder liner 16, and the top surface of the annular baffle wall 163 is higher than the lowest point of the discharge port 161. By setting the annular baffle wall 163, the annular baffle wall 163 and the baffle ring 162 together form a water collection groove with the inner wall of the cylinder liner 16. No matter where the water flows down from the inner wall of the cylinder liner 16, it can enter the water collection groove. Since the top surface of the annular baffle wall 163 is higher than the lowest point of the discharge port 161, the water in the water collection groove can be discharged through the discharge port 161.

[0046] In this embodiment, the inner wall of the cylinder liner 16 is provided with multiple discharge ports 161 spaced apart along the circumference, and all the discharge ports 161 are connected to the circulation outlet 111 to improve the drainage effect of the water collection tank of the cylinder liner 16. In order to avoid oil leakage, the pressure in the crankcase 11 needs to be maintained at -5kPa to -7kPa. In order to monitor the pressure in the crankcase 11 in real time, a pressure sensor 24 is also provided in the crankcase 11.

[0047] In this embodiment, the oil-gas mixture is a mixture of engine oil vapor and water vapor, and the oil-water mixture is a mixture of engine oil and water. When the liquid-gas mixture enters the liquid-gas separator 21, due to gravity, the liquid-gas mixture will separate into layers within the separator. The oil-gas mixture formed by the mixture of engine oil vapor and water vapor will be on top, and the oil-water mixture formed by the mixture of engine oil and water will be on the bottom. At this time, the oil-water mixture will have an oil-water level. Figure 3 As shown, in order to separate the oil-gas mixture from the oil-water mixture, the liquid-gas separator 21 also includes a gas outlet 213, and the liquid outlet 212 is lower than the oil-water liquid level so that the oil-water mixture can flow out through the liquid outlet 212, and the gas outlet 213 is higher than the oil-water liquid level so that the oil-gas mixture can flow out through the gas outlet 213.

[0048] It is worth noting that the oil-gas mixture cannot be discharged directly, otherwise it will pollute the environment. In this embodiment, the hydrogen fuel power system also includes an oil-gas separator 23, and the electrolyzer 22 includes a second inlet 225. The oil-gas separator 23 is connected to the gas outlet 213. The oil-gas separator 23 is configured to separate the oil vapor and water vapor in the gas discharged from the gas outlet 213. After the oil vapor is liquefied, it enters the electrolyzer 22 through the second inlet 225.

[0049] Water vapor is discharged through the exhaust port after passing through the oil-gas separator 23, while oil vapor liquefies into oil and enters the electrolytic cell 22 through the second inlet 225, and finally enters the crankcase 11 through the oil return pipe, thus avoiding oil loss. It is worth noting that some water vapor will also liquefy into water in the oil-gas separator 23, and this water can enter the electrolytic cell 22 along with the oil.

[0050] In this embodiment, to improve the liquid-gas separation effect, a plurality of isolation plates 214 are provided inside the liquid-gas separation box 21. The plurality of isolation plates 214 are alternately connected to two opposite side walls of the liquid-gas separation box 21. The plurality of isolation plates 214 can create a serpentine channel inside the liquid-gas separation box 21, thereby extending the flow path of the liquid-gas mixture inside the liquid-gas separation box 21, so that the oil-gas mixture and the oil-water mixture are fully separated, while allowing the oil-water mixture to flow smoothly and preventing the oil-water mixture from splashing and being discharged from the gas outlet 213.

[0051] In this embodiment, the end of the liquid-gas separator 21 furthest from the liquid-gas inlet 211 is recessed to form a drain trough 215, and the liquid outlet 212 is connected to the drain trough 215. This structure can further increase the distance between the oil-water mixture and the gas outlet 213, while also ensuring that the oil-water mixture can flow to the liquid outlet 212.

[0052] The liquid outlet 212 is located on the bottom or side of the liquid-gas separator 21, and the gas outlet 213 is located on the top of the liquid-gas separator 21.

[0053] like Figure 4 As shown, the electrolytic cell 22 is used to electrolyze water in an oil-water mixture. The electrolytic cell 22 includes a cathode electrolytic element 2271 and an anode electrolytic element 2272. When the cathode electrolytic element 2271 and the anode electrolytic element 2272 are energized, oxygen is generated on the surface of the anode electrolytic element 2272 and hydrogen is generated on the surface of the cathode electrolytic element 2271.

[0054] It is worth noting that, since engine oil and water are immiscible, the oil-water mixture will separate into layers after entering the electrolytic cell 22. Due to gravity, water will be in the lower layer and engine oil in the upper layer, thus forming an oil-water interface 228. To facilitate the separation of the oil-water mixture as quickly as possible, the first inlet 221 is at the same height as the oil-water interface 228.

[0055] To prevent the hydrogen and oxygen produced by electrolysis from mixing prematurely and causing safety hazards, the electrolytic cell 22 also includes a partition 226. The partition 226 divides the electrolytic cell 22 into a cathode electrolysis chamber and an anode electrolysis chamber. The partition 226 is spaced apart from the bottom of the electrolytic cell 22 so that the cathode electrolysis chamber and the anode electrolysis chamber are connected. After the liquid in the electrolytic cell 22 is separated into layers, there is an oil-water interface 228. The oil-water interface 228 is higher than the bottom of the partition 226.

[0056] By setting a partition 226 inside the electrolytic cell 22, the cathode electrolytic unit 2271 and the anode electrolytic unit 2272 can be separated, thereby preventing hydrogen and oxygen from mixing in the electrolytic cell 22. At the same time, the cathode electrolytic chamber and the anode electrolytic chamber can be connected at the bottom of the partition 226, so that the water entering the electrolytic cell 22 can flow between the cathode electrolytic chamber and the anode electrolytic chamber, ensuring that both the cathode electrolytic chamber and the anode electrolytic chamber are replenished with water, so that the electrolysis operation can continue.

[0057] Furthermore, the return gas ports include a first return gas port 222 and a second return gas port 223. The first return gas port 222 is connected to the cathode electrolysis chamber, and the second return gas port 223 is connected to the anode electrolysis chamber. Both the first return gas port 222 and the second return gas port 223 are connected to the intake manifold 13. This structure can further delay the mixing time of hydrogen and oxygen generated by electrolysis, allowing the mixing of hydrogen and oxygen to take place within the intake manifold 13, thereby improving safety.

[0058] In this embodiment, the partition 226 has a connecting hole 2261, which is higher than the oil-water interface 228. The connecting hole 2261 prevents the partition 226 from obstructing the flow of oil between the cathode and anodic electrolysis chambers, allowing the oil to flow freely between them. This ensures that the oil levels in both chambers are equal, preventing oil accumulation that could lead to uneven water levels, affecting electrolysis efficiency, and potentially causing the water level on one side to be lower than the partition 226, thus hindering the separation of oxygen and hydrogen.

[0059] Preferably, the height of the oil return port 224 is higher than that of the connecting hole 2261. With this structure, as the oil-water mixture in the electrolytic cell 22 increases, the oil level in the upper layer will gradually rise to the oil return port 224, thereby allowing the oil to flow back to the crankcase 11.

[0060] like Figure 1 As shown, one-way valves 26 are provided between the liquid outlet 212 and the first inlet 221, between the oil-gas separator 23 and the second inlet 225, between the first return port 222 and the intake manifold 13, and between the second return port 223 and the intake manifold 13 to prevent the backflow of liquid or gas.

[0061] In this embodiment, the bottom of the electrolytic cell 22 is provided with a drain port 229, which can discharge the liquid in the electrolytic cell 22 to facilitate the maintenance and repair of the electrolytic cell 22.

[0062] In this embodiment, the circulation mechanism 2 also includes a controller 25. The controller 25 is connected to the pressure sensor 24, the oil-gas separator 23, and the cathode electrolytic element 2271 and anode electrolytic element 2272 of the electrolytic cell 22. The controller 25 can detect the air pressure in the crankcase 11 according to the pressure sensor 24, control the oil-gas separator 23 to separate the oil-gas mixture, and control the electrolytic cell 22 to electrolyze the water in the oil-water mixture.

[0063] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A hydrogen fuel cell power system, characterized in that, include: An engine (1) includes a crankcase (11) and a cylinder head (12). The side wall of the crankcase (11) is provided with a circulation outlet (111). The cylinder head (12) is disposed in the crankcase (11) and is connected to an intake manifold (13). The circulation mechanism (2) includes an electrolytic cell (22) and a liquid-gas separator (21). The liquid-gas separator (21) includes a liquid-gas inlet (211) and a liquid outlet (212). The electrolytic cell (22) includes a first inlet (221), a return gas port, and an oil return port (224). The liquid-gas inlet (211) is connected to the circulation outlet (111), and the liquid outlet (212) is connected to the first inlet (221). The electrolytic cell (22) is configured to electrolyze water in the liquid. The return gas port is connected to the intake manifold (13), and the oil return port (224) is connected to the crankcase (11) through an oil return pipe.

2. The hydrogen fuel cell power system according to claim 1, characterized in that, The engine (1) also includes a cylinder liner (16), which is disposed inside the crankcase (11). The bottom of the cylinder liner (16) is connected to the interior of the crankcase (11). The side wall of the cylinder liner (16) is provided with a discharge port (161), which is connected to the circulation outlet (111).

3. The hydrogen fuel cell power system according to claim 2, characterized in that, The inner wall of the cylinder liner (16) is provided with a liquid baffle ring (162), and the liquid on the liquid baffle ring (162) can be discharged through the discharge port (161).

4. The hydrogen fuel cell power system according to claim 3, characterized in that, The liquid-retaining ring (162) is connected to an upwardly extending annular baffle (163), which is spaced apart from the inner wall of the cylinder liner (16), and the top surface of the annular baffle (163) is higher than the lowest point of the discharge port (161).

5. The hydrogen fuel cell power system according to claim 1, characterized in that, The liquid-gas separator (21) further includes a gas outlet (213). The liquid-gas mixture in the liquid-gas separator (21) has an oil-water level. The liquid outlet (212) is lower than the oil-water level, and the gas outlet (213) is higher than the oil-water level.

6. The hydrogen fuel cell power system according to claim 5, characterized in that, The hydrogen fuel power system also includes an oil-gas separator (23), and the electrolyzer (22) also includes a second inlet (225). The oil-gas separator (23) is connected to the gas outlet (213). The oil-gas separator (23) is configured to separate oil vapor and water vapor in the gas discharged from the gas outlet (213). The oil vapor is liquefied and enters the electrolyzer (22) through the second inlet (225).

7. The hydrogen fuel cell power system according to claim 1, characterized in that, The liquid-gas separator (21) is provided with a plurality of isolation plates (214), which are alternately connected to two opposite side walls of the liquid-gas separator (21).

8. The hydrogen fuel cell power system according to claim 1, characterized in that, The liquid-gas separator (21) is recessed at one end away from the liquid-gas inlet (211) to form a drain trough (215), and the liquid outlet (212) is connected to the drain trough (215).

9. The hydrogen fuel cell power system according to any one of claims 1 to 8, characterized in that, The electrolytic cell (22) includes a cathode electrolytic element (2271), an anode electrolytic element (2272), and a partition (226). The partition (226) divides the electrolytic cell (22) into a cathode electrolytic chamber and an anode electrolytic chamber. The partition (226) is spaced apart from the bottom of the electrolytic cell (22) so that the cathode electrolytic chamber and the anode electrolytic chamber are connected. The liquid in the electrolytic cell (22) has an oil-water interface (228) after stratification. The oil-water interface (228) is higher than the bottom of the partition (226).

10. The hydrogen fuel cell power system according to claim 9, characterized in that, The partition (226) has a connecting hole (2261) which is higher than the oil-water interface (228).

11. The hydrogen fuel cell power system according to claim 10, characterized in that, The height of the oil return port (224) is higher than that of the connecting hole (2261).

12. The hydrogen fuel cell power system according to claim 9, characterized in that, The return air port includes a first return air port (222) and a second return air port (223). The first return air port (222) is connected to the cathode electrolysis chamber, and the second return air port (223) is connected to the anode electrolysis chamber. Both the first return air port (222) and the second return air port (223) are connected to the intake manifold (13).

13. A vehicle, characterized in that, Includes the hydrogen fuel power system as described in claims 1 to 12.

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