WO2023035752A1 - Fuel cell integrated hydrogen supply system - Google Patents

Abstract

A fuel cell integrated hydrogen supply system comprises: an integrated housing, the integrated housing comprising a lower gas-water separator housing, an upper ejector housing and a buffer chamber housing, a hydrogen circulation pump being disposed on the ejector housing. One side of the gas-water separator housing is provided with a hydrogen return inlet, the bottom of the gas-water separator housing is provided with a water discharge opening, and the top of the gas-water separator housing is provided with a hydrogen return outlet. A labyrinth structure is installed inside the gas-water separator housing, used for separating water in a hydrogen-containing gas mixture. By means of integrating the gas-water separator housing with the ejector housing and the buffer chamber housing, and integrating the hydrogen circulation pump onto the ejector housing, the size is small, and the system can be installed and used in areas having little space, so that a connecting pipeline between hydrogen supply components is eliminated, the gas transmission distance is short, energy loss in the transmission process is reduced, pressurizing efficiency is improved, installation efficiency is high, and ice formation blockage caused by water accumulation in the pipeline when the temperature is too low is prevented.

Description

A fuel cell integrated hydrogen supply system Technical field:

The invention relates to a fuel cell integrated hydrogen supply system.

Background technique:

At present, the development of new energy fuel cell vehicles is considered an important link in the transformation of transportation energy and power. In order to ensure the normal operation of fuel cell engines, fuel cell engines generally require auxiliary systems such as hydrogen supply subsystems, air supply subsystems, and circulating water cooling management subsystems. . Fuel cells generate electrical energy through the electrochemical reaction between combustible substances (hydrogen) and oxygen in the air. After the fuel cell reacts, the exhaust gas contains a large amount of hydrogen. If these hydrogen are directly discharged into the atmosphere, on the one hand It is a waste of energy. On the other hand, it causes pollution to the environment. Third, hydrogen is flammable and explosive, which will cause danger. Therefore, it is necessary to recycle the hydrogen. At present, some hydrogen circulation pumps or injectors are used to circulate these hydrogen-containing mixed gases back to the fuel cell for recycling.

However, during the power generation process of the fuel cell stack, the water generated by the reaction will be taken out by the hydrogen-containing mixed gas, resulting in a high water vapor content and high humidity in the hydrogen-containing mixed gas. When these hydrogen-containing mixed gases enter the hydrogen Before the circulation pump or the ejector, the water vapor needs to be separated. Now the gas-water separator is generally used. The current gas-water separator, the hydrogen circulation pump and the ejector are generally set separately; at the same time, the ejector It is generally used to connect with the hydrogen source to pressurize the hydrogen gas. A proportional valve is generally installed at the inlet of the hydrogen source of the ejector to adjust the intake pressure. At present, the proportional valve and the ejector are generally set separately. , these functional components are connected through pipelines, the transmission distance is long, loss will occur during transmission, the transmission efficiency will be reduced, the pipeline connection is complicated, the installation efficiency is low, the volume is large, and it takes up a large space, which is not easy in some areas with small space It is installed and used, and water is easy to accumulate in the pipeline, and it is easy to freeze and block when the temperature is too low. At the same time, the existing gas-water separator has a poor degree of integration and cannot detect the internal air pressure and liquid level well. Moreover, when the temperature is too low, the bottom drain is easy to freeze and block, resulting in the failure of internal water discharge. In addition, some of the existing gas-water separators have poor water separation effect and cannot effectively separate the remaining hydrogen that has not participated in the reaction from water, resulting in a large amount of water entering the hydrogen circulation pump, ejector and stack, resulting in flooding. The power of the stack is reduced, which affects the stability of the fuel cell system; although some water separation effects are good, the internal structure is too complicated, and the resistance encountered when the hydrogen-containing mixed gas passes is very large, resulting in the air pressure at the gas-water separator gas outlet. It is greatly reduced, thereby increasing the power consumption of the hydrogen circulation pump and ejector.

To sum up, the integration of fuel cell hydrogen circuit hydrogen supply components has become a technical problem that needs to be solved urgently in the industry.

Invention content:

In order to make up for the deficiencies of the prior art, the present invention provides a fuel cell integrated hydrogen supply system, which solves the problems of separate installation of hydrogen supply parts in the hydrogen circuit, large volume, and large space occupation, and solves the problems of the hydrogen circuit in the past. The hydrogen supply parts are complicated to connect through pipelines, and the problems of easy water accumulation and freezing blockage have been solved, which solves the problems of long transmission distance and loss during the transmission process of hydrogen supply components through pipeline connections in the past.

The technical scheme that the present invention adopts for solving the problems of the technologies described above is:

A fuel cell integrated hydrogen supply system, comprising:

An integrated housing, the integrated housing includes a lower gas-water separator housing, an upper ejector housing and a buffer chamber housing, and a hydrogen circulation pump is installed on the ejector housing;

One side of the gas-water separator housing is provided with a hydrogen return inlet, the bottom of the gas-water separator housing is provided with a drain outlet, and the top of the gas-water separator housing is provided with a hydrogen return outlet, which is installed inside the gas-water separator housing. There is a labyrinth structure, which is used to separate the water in the hydrogen-containing gas mixture;

A high-pressure nozzle is installed on one side of the ejector housing, the front side of the high-pressure nozzle is a hydrogen source inlet, the periphery of the high-pressure nozzle is provided with a low-pressure area, and the rear side of the high-pressure nozzle is a high-pressure area;

The air inlet of the hydrogen circulation pump is connected with the hydrogen return outlet, and the exhaust port of the hydrogen circulation pump is connected with the low pressure area;

The top of the buffer chamber housing is provided with a hydrogen inlet, and one side of the buffer chamber housing is provided with a first proportional valve and a second proportional valve, and the first proportional valve is connected to the hydrogen source inlet through the first vertical channel in the buffer chamber housing The second proportional valve communicates with the high-pressure area through the second vertical passage in the buffer chamber housing, the transverse passage in the ejector housing, and the longitudinal passage in the ejector housing.

The labyrinth structure includes:

A water baffle, the water baffle is installed in the gas-water separator housing below the hydrogen return inlet, and the water baffle is used to prevent the water stored in the bottom of the gas-water separator housing from oscillating upwards, and the water baffle is There is a water drop hole on the water retaining plate;

The primary water dividing plate is obliquely installed in the gas-water separator housing on the side opposite to the hydrogen return inlet, and the side of the first water dividing plate close to the hydrogen returning inlet is connected to the gas-water separator shell The body is arranged at intervals, the side of the primary water separation plate away from the hydrogen return inlet is fixedly connected with the shell of the gas-water separator and a first gap is provided, and the side of the primary water separation plate close to the hydrogen return inlet is higher than The primary water separator is away from the side of the hydrogen return inlet;

The secondary water dividing plate is obliquely installed in the gas-water separator housing above the primary water dividing plate, and the secondary water dividing plate is far away from the side of the hydrogen return inlet and the gas-water separator housing Set at intervals between them, the side of the secondary water dividing plate close to the hydrogen return inlet is fixedly connected with the gas-water separator housing and has a second gap, and the side of the secondary water dividing plate away from the hydrogen returning inlet is higher than two The fraction water plate is close to the hydrogen return inlet side.

The water retaining plate includes an arc-shaped plate with a high middle and low ends, and the drain holes are arranged on both sides of the arc-shaped plate.

The shell of the gas-water separator is integrally casted with the water retaining plate, the primary water dividing plate and the secondary water dividing plate.

The shell of the gas-water separator is integrally cast with the shell of the ejector and the shell of the buffer chamber.

The hydrogen circulation pump includes a connected motor housing, a bearing seat and a flow channel cover plate, the flow channel cover plate is connected to the ejector housing, a motor cavity is formed between the motor housing and the bearing seat, and the motor A stator, a rotor and a motor shaft are arranged in the chamber, and a pressurized chamber is formed between the bearing seat and the flow channel cover plate. With air inlet and outlet.

A drain valve is installed on the housing of the gas-water separator at the drain outlet to control the on-off of the drain outlet; a gas-outlet detection pressure gauge is installed on the housing of the gas-water separator near the hydrogen return outlet for Detect the gas pressure at the hydrogen outlet; the gas-water separator housing near the drain is equipped with a liquid level gauge for detecting the water level at the bottom of the gas-water separator housing; the bottom of the gas-water separator housing is installed There is a heater for heating the bottom of the gas-water separator shell to prevent the drain from freezing and blocking; a nitrogen exhaust valve is installed on the top of the gas-water separator shell to discharge the air inside the gas-water separator shell.

The high pressure zone includes a suction section, a mixing section and a diffusion section.

The inlet of the hydrogen source is equipped with an inlet detection pressure gauge for detecting the gas pressure at the inlet of the hydrogen source.

A switch valve is provided on the buffer chamber housing at the hydrogen inlet.

The present invention adopts above-mentioned scheme, has the following advantages:

By integrating the shell of the gas-water separator with the shell of the ejector and the shell of the buffer chamber, it is used to install the hydrogen supply parts of the hydrogen circuit, integrate the hydrogen circulation pump on the shell of the ejector, and integrate the first proportional valve , The second proportional valve is integrated on the buffer chamber housing, the first proportional valve communicates with the hydrogen source inlet through the first vertical passage in the buffer chamber housing, and the second proportional valve communicates with the hydrogen source inlet through the second vertical passage in the buffer chamber housing 1. The horizontal channel in the ejector shell and the longitudinal channel in the ejector shell are connected with the high-pressure area, which not only realizes the distribution of the proportion of hydrogen in the buffer chamber shell entering the hydrogen source inlet and the high-pressure area, but also has a small volume and occupies a lot of space. Small, it can be installed and used in some areas with small space, the connecting pipeline between the hydrogen supply parts of the hydrogen circuit is canceled, the gas transmission distance is short, the energy loss in the transmission process is reduced, the boosting efficiency is improved, and the installation efficiency High, to avoid freezing blockage caused by water accumulation in the pipeline when the temperature is too low;

By integrating the gas outlet detection pressure gauge, liquid level gauge, heater, and drain valve into the shell of the gas-water separator, the structure is compact, the volume is small, and the degree of integration is high. The gas outlet detection pressure gauge is used to detect the gas pressure at the hydrogen outlet. , to ensure that the outlet pressure meets the requirements, the liquid level gauge is used to detect the water level at the bottom of the gas-water separator shell, and when the water level reaches the set value, open the drain valve to discharge the water in time, and the heater is used to heat the bottom of the gas-water separator shell Prevent the drain from freezing and blocking;

By setting the primary water separation plate and the secondary water separation plate in the shell of the gas-water separator, after the hydrogen-containing mixed gas enters the interior of the gas-water separator from the hydrogen return inlet, part of it is blocked by the primary water separation plate and passes through the first gap. Transported backwards, the other part is blocked by the first-stage water-splitting plate and returned to the side between the side of the first-stage water-separating plate close to the hydrogen return inlet and the gas-water separator shell, and the two parts are separated by the second-stage water-separating plate The side of the hydrogen return inlet and the shell of the gas-water separator is transported backward to the hydrogen return outlet, and a part of the hydrogen-containing mixed gas enters from the hydrogen return inlet and is directly transported backward through the second gap to the hydrogen return outlet. The water vapor in the mixed gas condenses into liquid droplets on the lower surfaces of the first water separator and the second water separator and falls down under the action of gravity; the water vapor in the hydrogen-containing mixed gas The upper surface of the fractionation water plate condenses into liquid droplets and flows to the first gap and the second gap to drop down, and finally flows into the bottom of the gas-water separator shell through the water drop hole on the water retaining plate, and finally discharges from the drain port . The setting of the first water diversion plate and the second water diversion plate not only has a good water separation effect, but also can effectively separate hydrogen from water, avoiding flooding caused by a large amount of water entering the injector and stack, and the first gap and the second The setting of the two gaps can greatly reduce the resistance encountered when the hydrogen-containing mixed gas passes through, ensure the gas pressure at the hydrogen return outlet, and reduce the power consumption of the ejector.

Description of drawings:

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a left view structural schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the cross-sectional structure along A-A in Fig. 2 .

FIG. 4 is a schematic diagram of a cross-sectional structure along B-B in FIG. 2 .

Fig. 5 is a schematic diagram of the principle of the gas-water separation structure of the present invention.

In the figure, 1. Gas-water separator housing, 2. Ejector housing, 3. Buffer chamber housing, 4. Hydrogen return inlet, 5. Drain outlet, 6. Hydrogen return outlet, 7. High pressure nozzle, 8 . Hydrogen source inlet, 9. Low pressure area, 10. Hydrogen gas inlet, 11. First proportional valve, 12. Second proportional valve, 13. First vertical channel, 14. Second vertical channel, 15. Horizontal channel, 16. Longitudinal channel, 17. Water retaining plate, 18. Drainage hole, 19. Primary water diversion plate, 20. First gap, 21. Secondary water diversion plate, 22. Second gap, 23. Outlet gas detection pressure gauge , 24. Liquid level gauge, 25. Heater, 26. Nitrogen exhaust valve, 27. Drain valve, 28. Suction section, 29. Mixing section, 30. Diffusion section, 31. Intake detection pressure gauge, 32. On-off valve , 33, hydrogen circulation pump, 34, motor housing, 35, bearing seat, 36, flow channel cover plate, 37, impeller, 38, air inlet, 39, exhaust port.

Detailed ways:

In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

As shown in Figure 1-5, a fuel cell integrated hydrogen supply system includes:

An integrated housing, which includes a lower gas-water separator housing 1, an upper ejector housing 2 and a buffer chamber housing 3, and a hydrogen circulation pump 33 is installed on the ejector housing 2 ;

One side of the gas-water separator housing 1 is provided with a hydrogen return inlet 4, the bottom of the gas-water separator housing is provided with a drain outlet 5, and the top of the gas-water separator housing is provided with a hydrogen return outlet 6. A labyrinth structure is installed inside the shell to separate the water in the hydrogen-containing mixed gas;

A high-pressure nozzle 7 is installed on one side of the ejector housing 2, the front side of the high-pressure nozzle is a hydrogen source inlet 8, and the periphery of the high-pressure nozzle is provided with a low-pressure zone 9, and the rear side of the high-pressure nozzle is a high-pressure zone;

The air inlet 38 of the hydrogen circulation pump 33 is communicated with the hydrogen return outlet 6, and the exhaust port 39 of the hydrogen circulation pump is communicated with the low pressure zone 9;

The top of the buffer chamber housing 3 is provided with a hydrogen inlet 10, and one side of the buffer chamber housing is provided with a first proportional valve 11 and a second proportional valve 12, and the first proportional valve passes through the first vertical passage 13 in the buffer chamber housing. It communicates with the hydrogen source inlet 8, and the second proportional valve communicates with the high-pressure area through the second vertical passage 14 in the buffer chamber housing, the transverse passage 15 in the ejector housing, and the longitudinal passage 16 in the ejector housing.

The labyrinth structure includes:

Water baffle 17, the water baffle is installed in the gas-water separator housing below the hydrogen return inlet, and the water baffle is used to prevent the water stored in the bottom of the gas-water separator housing from oscillating upwards, so The water retaining plate is provided with a water drop hole 18;

The primary water dividing plate 19, the primary water dividing plate is obliquely installed in the gas-water separator housing on the side opposite to the hydrogen return inlet, the side of the primary water dividing plate close to the hydrogen returning inlet is connected to the gas-water separator The shells are arranged at intervals, the side of the primary water dividing plate away from the hydrogen return inlet is fixedly connected with the gas-water separator housing and a first gap 20 is provided, and the first level water dividing plate is close to the side of the hydrogen returning inlet It is higher than the first-level water dividing plate and away from the side of the hydrogen return inlet;

The secondary water dividing plate 21, the secondary water dividing plate is obliquely installed in the gas-water separator housing above the primary water dividing plate, the side of the secondary water dividing plate is away from the hydrogen return inlet and the gas-water separator shell The body is arranged at intervals, the side of the secondary water separation plate close to the hydrogen return inlet is fixedly connected with the gas-water separator shell and a second gap 22 is provided, and the side of the secondary water separation plate away from the hydrogen return inlet is high On the side of the secondary water separator near the hydrogen return inlet.

The water baffle includes an arc-shaped plate with a high middle and low ends, and the drain holes are arranged on both sides of the arc-shaped plate to facilitate the water on the water baffle to enter the housing of the air-water separator from the drain holes on both sides bottom.

The shell of the gas-water separator is integrally casted with the water retaining plate, the primary water dividing plate and the secondary water dividing plate.

The shell of the gas-water separator is integrally cast with the shell of the ejector and the shell of the buffer chamber.

The hydrogen circulation pump 33 includes a connected motor housing 34, a bearing seat 35 and a flow channel cover plate 36, the flow channel cover plate 36 is connected with the injector housing 2, and a motor housing and the bearing seat form a A motor chamber, the motor chamber is provided with a stator, a rotor and a motor shaft, a pressurized chamber is formed between the bearing seat and the flow channel cover, the motor shaft passes through the bearing seat and extends into the pressurized chamber and the impeller 37 is installed, An air inlet 38 and an air outlet 39 are arranged on the flow channel cover plate.

A drain valve 27 is installed on the housing of the gas-water separator at the drain to control the on-off of the drain; the housing of the gas-water separator near the hydrogen return outlet is equipped with a gas outlet detection pressure gauge 23, Used to detect the gas pressure at the hydrogen outlet; the gas-water separator housing near the drain is equipped with a liquid level gauge 24 for detecting the water level at the bottom of the gas-water separator housing; the gas-water separator housing A heater 25 is installed at the bottom of the body to heat the bottom of the gas-water separator shell to prevent the drain from freezing and blocking; a nitrogen discharge valve 26 is installed on the top of the gas-water separator shell to discharge the gas-water separator shell air inside the body.

The high pressure zone includes a suction section 28 , a mixing section 29 and a diffuser section 30 .

The inlet of the hydrogen source is equipped with an inlet detection pressure gauge 31 for detecting the gas pressure at the inlet of the hydrogen source.

A switch valve 32 is provided on the buffer chamber housing at the hydrogen inlet to control the on-off of the hydrogen inlet.

working principle:

After the hydrogen-containing mixed gas discharged from the fuel cell stack enters the shell of the gas-water separator from the hydrogen return inlet 4, part of it is blocked by the primary water separator plate 19 and transported backward from the first gap 20, and the other part is blocked by the primary separator plate 19. The water plate prevents the return from being transported backward through the primary water dividing plate near the hydrogen return inlet side and the gas-water separator shell, and the two parts are separated from the gas-water through the second water dividing plate 21 on the side away from the hydrogen returning inlet Between the shells of the device, it is transported backward to the hydrogen return outlet, and a small amount of hydrogen-containing mixed gas enters from the hydrogen return inlet and is directly transported backward through the second gap 22 to the hydrogen return outlet. The gas outlet detection pressure gauge is installed in the installation hole 23. The gas outlet detection pressure gauge is used to detect the gas pressure at the hydrogen outlet 6 to ensure that the gas outlet pressure meets the requirements. The water vapor in the hydrogen-containing mixed gas condenses into liquid droplets on the lower surfaces of the first water separator plate and the second water separator plate and falls downwards under the action of gravity, and the water vapor in the hydrogen-containing mixed gas passes through the first water separator plate and the upper surface of the secondary water dividing plate condense into liquid droplets and flow to the first gap and the second gap to drop downwards, and finally flow into the bottom of the gas-water separator housing through the water falling hole 18 on the water retaining plate 17, and finally Discharge from drain 5. The setting of the first water diversion plate and the second water diversion plate not only has a good water separation effect, but also can effectively separate hydrogen from water, avoiding flooding caused by a large amount of water entering the injector and stack, and the first gap and the second The setting of the two gaps can greatly reduce the resistance encountered when the hydrogen-containing mixed gas passes through, ensure the gas pressure at the hydrogen return outlet, and reduce the power consumption of the ejector. The gas discharged from the hydrogen return outlet 6 enters the pressurization chamber of the hydrogen circulation pump 33 through the air inlet 38, and after being pressurized by the high-speed rotating impeller 37, it enters the low-pressure area 9 of the ejector from the exhaust port 39, and then passes through the high-pressure chamber. The suction section, mixing section and diffusion section of the zone are discharged backwards to realize the pressurization of the gas. At the same time, the hydrogen of the hydrogen source enters the buffer housing 3 from the hydrogen inlet 10 for buffering, and then a part of the hydrogen enters the hydrogen source inlet 8 through the first proportional valve 11 and the first vertical channel 13, and the hydrogen source inlet 8 can be installed The inlet detection pressure gauge 31 is used to detect the inlet pressure. After the hydrogen gas at the hydrogen source inlet 8 is pressurized by the high-pressure nozzle 7, it is discharged backward through the suction section, the mixing section and the diffusion section of the high-pressure area; the other part of the hydrogen gas is discharged through the second The two proportional valves 12, the second vertical passage 14, the transverse passage 15, and the longitudinal passage 16 directly enter the high-pressure area and discharge backward. The hydrogen gas from the hydrogen source is mixed with the dehydrated hydrogen-containing mixed gas and sent to the fuel cell stack. By integrating the shell of the gas-water separator with the shell of the ejector and the shell of the buffer chamber, it is used to install the hydrogen supply parts of the hydrogen circuit, integrate the hydrogen circulation pump on the shell of the ejector, and integrate the first proportional valve , The second proportional valve is integrated on the buffer chamber housing, the first proportional valve communicates with the hydrogen source inlet through the first vertical passage in the buffer chamber housing, and the second proportional valve communicates with the hydrogen source inlet through the second vertical passage in the buffer chamber housing 1. The horizontal channel in the ejector shell and the longitudinal channel in the ejector shell are connected with the high-pressure area, which not only realizes the distribution of the proportion of hydrogen in the buffer chamber shell entering the hydrogen source inlet and the high-pressure area, but also has a small volume and occupies a lot of space. Small, it can be installed and used in some areas with small space, the connecting pipeline between the hydrogen supply parts of the hydrogen circuit is canceled, the gas transmission distance is short, the energy loss in the transmission process is reduced, the boosting efficiency is improved, and the installation efficiency High, to avoid freezing blockage caused by water accumulation in the pipeline when the temperature is too low.

The above specific implementation manners cannot be regarded as limiting the protection scope of the present invention. For those skilled in the art, any substitution, improvement or transformation made to the implementation manners of the present invention shall fall within the protection scope of the present invention.

The parts of the present invention that are not described in detail are known technologies of those skilled in the art.

Claims (10)

A fuel cell integrated hydrogen supply system, characterized in that: comprising: An integrated housing, the integrated housing includes a lower gas-water separator housing, an upper ejector housing and a buffer chamber housing, and a hydrogen circulation pump is installed on the ejector housing; One side of the gas-water separator housing is provided with a hydrogen return inlet, the bottom of the gas-water separator housing is provided with a drain outlet, and the top of the gas-water separator housing is provided with a hydrogen return outlet, which is installed inside the gas-water separator housing. There is a labyrinth structure, which is used to separate the water in the hydrogen-containing gas mixture; A high-pressure nozzle is installed on one side of the ejector housing, the front side of the high-pressure nozzle is a hydrogen source inlet, the periphery of the high-pressure nozzle is provided with a low-pressure area, and the rear side of the high-pressure nozzle is a high-pressure area; The air inlet of the hydrogen circulation pump is connected with the hydrogen return outlet, and the exhaust port of the hydrogen circulation pump is connected with the low pressure area; The top of the buffer chamber housing is provided with a hydrogen inlet, and one side of the buffer chamber housing is provided with a first proportional valve and a second proportional valve, and the first proportional valve is connected to the hydrogen source inlet through the first vertical channel in the buffer chamber housing The second proportional valve communicates with the high-pressure area through the second vertical passage in the buffer chamber housing, the transverse passage in the ejector housing, and the longitudinal passage in the ejector housing. The fuel cell integrated hydrogen supply system according to claim 1, wherein the labyrinth structure comprises: A water baffle, the water baffle is installed in the gas-water separator housing below the hydrogen return inlet, and the water baffle is used to prevent the water stored in the bottom of the gas-water separator housing from oscillating upwards, and the water baffle is There is a water drop hole on the water retaining plate; The primary water dividing plate is obliquely installed in the gas-water separator housing on the side opposite to the hydrogen return inlet, and the side of the first water dividing plate close to the hydrogen returning inlet is connected to the gas-water separator shell The body is arranged at intervals, the side of the first-stage water separation plate away from the hydrogen return inlet is fixedly connected with the gas-water separator housing and has a first gap, and the side of the first-level water separation plate close to the hydrogen return inlet is higher than The primary water separator is away from the side of the hydrogen return inlet; The secondary water dividing plate is obliquely installed in the gas-water separator housing above the primary water dividing plate, and the secondary water dividing plate is far away from the side of the hydrogen return inlet and the gas-water separator housing Set at intervals between them, the side of the secondary water dividing plate close to the hydrogen return inlet is fixedly connected with the gas-water separator housing and has a second gap, and the side of the secondary water dividing plate away from the hydrogen returning inlet is higher than two The fraction water plate is close to the hydrogen return inlet side. The fuel cell integrated hydrogen supply system according to claim 2, characterized in that: the water baffle includes an arc-shaped plate with a high middle and low ends, and the drain holes are arranged on both sides of the arc-shaped plate . A fuel cell integrated hydrogen supply system according to claim 2, characterized in that: the shell of the gas-water separator is integrally cast with the water baffle, the primary water diversion plate, and the secondary water diversion plate . The fuel cell integrated hydrogen supply system according to claim 1, characterized in that: the gas-water separator housing, the ejector housing and the buffer chamber housing are integrally cast and formed. The fuel cell integrated hydrogen supply system according to claim 1, characterized in that: the hydrogen circulation pump includes a connected motor housing, a bearing seat, and a flow channel cover, and the flow channel cover is connected to the ejector The motor housing is connected with the housing, and a motor chamber is formed between the motor housing and the bearing seat. The stator, rotor and motor shaft are arranged in the motor chamber, and a pressurized chamber is formed between the bearing seat and the runner cover. The motor shaft Pass through the bearing seat and extend into the pressurized chamber and install the impeller, and the flow channel cover plate is provided with an air inlet and an air outlet. A fuel cell integrated hydrogen supply system according to claim 1, characterized in that: a drain valve is installed on the housing of the gas-water separator at the drain port to control the on-off of the drain port; A gas outlet detection pressure gauge is installed on the shell of the gas-water separator near the hydrogen return outlet to detect the gas pressure at the hydrogen return outlet; a liquid level gauge is installed on the shell of the gas-water separator near the drain for Detect the water level at the bottom of the gas-water separator shell; a heater is installed at the bottom of the gas-water separator shell to heat the bottom of the gas-water separator shell to prevent the drain from freezing and blocking; the gas-water separator shell A nitrogen discharge valve is installed on the top of the body to discharge the air inside the shell of the gas-water separator. The fuel cell integrated hydrogen supply system according to claim 1, wherein the high-pressure zone includes a suction section, a mixing section and a diffusion section. The fuel cell integrated hydrogen supply system according to claim 1, characterized in that: the inlet of the hydrogen source is equipped with an inlet detection pressure gauge for detecting the gas pressure at the inlet of the hydrogen source. The integrated fuel cell hydrogen circuit hydrogen supply regulation system according to claim 1, characterized in that: a switch valve is provided on the buffer chamber housing at the hydrogen inlet.

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