Integrated ejection apparatus and fuel cell system

Abstract

The present application relates to an integrated ejection apparatus and a fuel cell system. The apparatus comprises an ejector body, a left manifold, a right manifold, and a hydrogen circulating pump, wherein the left manifold, the right manifold, and the hydrogen circulating pump are integrated on the ejector body; the ejector body is provided with an ejection cavity, an ejection inlet, an ejection outlet, and a recirculation inlet; the left manifold and the right manifold are both provided with a hydrogen channel, an air channel, and a coolant channel; the left manifold is arranged on an ejection outlet side of the ejector body; the right manifold is arranged on a side of the ejector body opposite the left manifold, and the hydrogen channel of the right manifold is configured for connecting to a hydrogen outlet of a stack so as to introduce recirculated hydrogen, and passes through a gas-liquid separation cavity of the right manifold and a water tank; the hydrogen circulating pump is arranged on a recirculation inlet side of the ejector body, a hydrogen inlet of the hydrogen circulating pump is connected to an outlet of the hydrogen channel of the right manifold, and a hydrogen outlet of the hydrogen circulating pump is connected to the recirculation inlet of the ejector body. The present application offers a high degree of integration and complete functionality.

Description

Integrated ejector and fuel cell system TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell hydrogen supply systems, in particular to an integrated ejector and fuel cell system.

[0002] BACKGROUND

[0003] The hydrogen supply system of a fuel cell, namely a hydrogen module, is used to ensure smooth supply of hydrogen by passing high-pressure hydrogen delivered from a hydrogen storage system through a series of components such as heat exchangers, hydrogen injection valves, etc. to the electric pile, so as to realize stable external output of electric energy of the fuel cell system. However, in the existing mainstream fuel cell system, the hydrogen module adopts a scheme without an ejector or a scheme with only an isolated ejector structure, so that the hydrogen supply capacity is too simple, the degree of integration of components is not high, the number of components is large, the structure is loose, the layout span is large, and the installation and maintenance are complex, thereby affecting the production efficiency. Meanwhile, when manufacturers select and install a large number of separate components, the hydrogen supply function is not perfect due to lack of integration, thereby affecting the power generation output effect of the fuel cell system. SUMMARY

[0004] The present application provides an integrated ejector and fuel cell system to solve the problem that the hydrogen module of the fuel cell in the prior art only adopts separate components, the degree of integration is not high, the number of components is large, the structure is loose, the layout span is large, and the installation and maintenance are complex and the function is not perfect.

[0005] According to the integrated ejector provided by the present application, the integrated ejector comprises an ejector body, a left bus plate, a right bus plate and a hydrogen circulation pump, and the left bus plate, the right bus plate and the hydrogen circulation pump are integrated on the ejector body.

[0006] The ejector body is provided with an ejecting cavity, an ejecting inlet, an ejecting outlet and a backflow inlet, and the ejecting inlet, the ejecting outlet and the backflow inlet are in communication with the ejecting cavity.

[0007] The left bus plate and the right bus plate are used to connect the electric pile and the ejector body, and the left bus plate and the right bus plate are each provided with a hydrogen passage, an air passage and a cooling liquid passage.

[0008] The left bus plate is arranged at the ejecting outlet side of the ejector body, and the hydrogen passage thereof is connected with the ejecting outlet to supply hydrogen to the hydrogen inlet of the electric pile. The right bus plate is arranged at the side of the ejector body opposite to the left bus plate, and the hydrogen passage thereof is used to connect the hydrogen outlet of the electric pile to introduce backflow hydrogen. The right bus plate is further provided with a gas-liquid separation cavity and a water tank, and the hydrogen passage of the right bus plate passes through the gas-liquid separation cavity and the water tank.

[0009] The hydrogen circulation pump is arranged at the backflow inlet side of the ejector body, the hydrogen inlet of the hydrogen circulation pump is connected with the outlet of the hydrogen passage of the right manifold plate, and the hydrogen outlet of the hydrogen circulation pump is connected with the backflow inlet of the ejector body.

[0010] In some embodiments, the ejector nozzle is arranged in the ejector cavity, and the ejector nozzle comprises a sealing section, a fitting section, a backflow section and a nozzle section arranged in sequence; the sealing structure is arranged between the sealing section and the ejector cavity; the outer diameter of the fitting section is consistent with the inner diameter of the ejector cavity, and the fitting section is arranged in close contact with the ejector cavity; the backflow section is tapered between the fitting section to form a backflow cavity between the backflow section and the ejector cavity; and the backflow inlet is arranged at the position of the backflow cavity and communicates with the backflow cavity.

[0011] In some embodiments, the ejector body is further provided with a flow control valve.

[0012] The sealing section of the ejector nozzle is internally provided with a nozzle groove, the valve body of the flow control valve is in profiled cooperation with the nozzle groove, and a sealing structure is arranged between the valve body and the nozzle groove; the ejector inlet is arranged on the sealing section and extends through the nozzle groove to the gas inlet of the flow control valve, and the gas outlet of the flow control valve communicates with the gas conveying pipe of the ejector nozzle.

[0013] In some embodiments, the water tank of the right manifold plate is arranged below the gas-liquid separation cavity, a plurality of baffles are arranged in the gas-liquid separation cavity, and the opposite ends of adjacent baffles are provided with gas passages.

[0014] In some embodiments, the hydrogen inlet of the hydrogen passage of the right manifold plate is arranged at the back of the plate body, the hydrogen outlet of the hydrogen passage of the right manifold plate is arranged at the front of the plate body, and the hydrogen circulation pump is arranged at the front of the ejector body to connect the hydrogen outlet of the hydrogen passage of the right manifold plate.

[0015] In some embodiments, on the left manifold plate and the right manifold plate, the connection ports of the hydrogen passages, the connection ports of the air passages and the connection ports of the cooling liquid passages with the stack are all arranged at the back of the plate body of the corresponding manifold plate.

[0016] In some embodiments, the integrated ejector device further comprises a hydrogen heat exchanger, the hydrogen heat exchanger is arranged at the opposite side of the backflow inlet of the ejector body, the outlet of the hydrogen heat exchanger is provided with a protruding structure, the ejector inlet of the ejector body is provided with a groove structure, the protruding structure is inserted into the groove structure, and a sealing structure is arranged therebetween to realize the sealed connection between the hydrogen heat exchanger and the ejector inlet.

[0017] In some embodiments, the cooling liquid passage of the right manifold plate is provided with a cooling liquid leading branch, the cooling liquid passage of the left manifold plate is provided with a cooling liquid backflow branch, the heat medium inlet of the hydrogen heat exchanger communicates with the cooling liquid leading branch, and the heat medium outlet of the hydrogen heat exchanger communicates with the cooling liquid backflow branch.

[0018] In some embodiments, the injection inlet is arranged above the right side of the ejector body, the injection outlet is arranged at the left side of the ejector body, and the backflow inlet is arranged at the lower side of the ejector body.

[0019] According to another aspect of the present application, a fuel cell system is provided, which comprises an electric pile and an integrated ejector device as above.

[0020] The technical solution of the present application integrates the left bus plate, the right bus plate and the hydrogen circulation pump on the basis of the ejector body, connects the ejector device and the electric pile by means of the left bus plate and the right bus plate, integrates the hydrogen, air and cooling liquid pipes at the inlet and outlet sides of the electric pile, integrates the gas-liquid separation cavity and the water tank on the hydrogen passage of the right bus plate, connects the hydrogen circulation pump with the backflow inlet of the ejector body, realizes the series connection of the ejector body and the hydrogen circulation pump, and makes the ejector body and the hydrogen circulation pump bear different pressure rises, so as to adapt to different power requirements of the fuel cell system under different working conditions. The present application has simple structure, high integration degree and more perfect functions.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0024] Fig. 1 shows a front structure schematic diagram of the integrated ejector device of one embodiment of the present application;

[0025] Fig. 2 shows a cross-section structure schematic diagram of the ejector body of the integrated ejector device of one embodiment of the present application from the front;

[0026] Fig. 3 shows a cross-section schematic diagram of the right bus plate of the integrated ejector device of one embodiment of the present application from the front;

[0027] Fig. 4 shows a back structure schematic diagram of the integrated ejector device of one embodiment of the present application;

[0028] Fig. 5 shows a cross-section structure schematic diagram of the injection cavity and the injection nozzle of the integrated ejector device of one embodiment of the present application;

[0029] Figure 6 shows a schematic diagram of the cross-sectional structure of the ejector body of the integrated ejector device according to an embodiment of the present application;

[0030] Figure 7 shows a schematic diagram of the installation position of the hydrogen heat exchanger of the integrated ejector device according to an embodiment of the present application;

[0031] Figure 8 shows a schematic diagram of the three-dimensional structure of the hydrogen heat exchanger of the integrated ejector device according to an embodiment of the present application;

[0032] Figure 9 shows a schematic diagram of the cross-sectional structure of the hydrogen inlet of the hydrogen heat exchanger of the integrated ejector device according to an embodiment of the present application;

[0033] Figure 10 shows a schematic diagram of the sealing structure of the integrated ejector device according to an embodiment of the present application;

[0034] In the above figures, the following reference signs are used: 10, ejector body; 11, ejector cavity; 111, ejector inlet; 1111, groove structure; 112, ejector outlet; 113, backflow inlet; 12, ejector nozzle; 121, sealing section; 1211, nozzle groove; 122, abutting section; 123, backflow section; 124, nozzle section; 13, flow control valve; 131, sealing ring; 20, left manifold plate; 21, left air inlet; 22, left air outlet; 23, left coolant inlet; 24, left coolant outlet; 25, left hydrogen outlet; 30, right manifold plate; 31, right air inlet; 32, right air outlet; 33, right coolant inlet; 34, right coolant outlet; 35, right hydrogen inlet; 36, gas-liquid separation cavity; 361, baffle; 37, water tank; 40, hydrogen circulation pump; 50, hydrogen heat exchanger; 51, protrusion structure; 52, water inlet pipe; 53, water outlet pipe; 54, hydrogen inlet.

[0035] Implementation of the present application

[0036] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0038] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "medial", "front", "back" and derivatives thereof (e.g., "anterior", "posterior", etc.) can be used herein with reference to the exemplary embodiment as illustrated in the drawings. However, it is to be understood that no or none of these terms is intended to limit the position of the device in use or operation, and as can be apparent from the disclosure, the terms can, where appropriate, be used interchangeably with one another.

[0039] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0040] It will be understood that the terms "first", "second", etc. are used herein only to describe the different objects and are not intended to denote specific orders or sequences of the described embodiments. It is to be understood that the data used herein can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in other than the order shown or described herein. Furthermore, the terms "comprise" and "comprising" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or elements does not necessarily comprise only those steps or elements

[0041] FIGS. 1-10 schematically illustrate an embodiment of an integrated ejector device according to the present application. The integrated ejector device according to the present application refers to a highly integrated ejector structure, which, in addition to the ejector for ejecting hydrogen gas, has a pipe structure for supplying hydrogen gas, air and cooling liquid to the ejector. Thus, the integrated ejector device according to the present application can be used as a single part, and can be more simply and conveniently connected to an apparatus such as a fuel cell stack.

[0042] As shown in FIGS. 1-10, the present application discloses an integrated ejector device, which comprises an ejector body 10, a left manifold plate 20, a right manifold plate 30 and a hydrogen circulation pump 40, and the left manifold plate 20, the right manifold plate 30 and the hydrogen circulation pump 40 are integrated on the ejector body 10.

[0043] The ejector body 10 is provided with an ejector cavity 11, an ejector inlet 111, an ejector outlet 112 and a backflow inlet 113, and the ejector inlet 111, the ejector outlet 112 and the backflow inlet 113 are all communicated with the ejector cavity 11. Among them, the ejector inlet 111 is used for receiving high-pressure primary hydrogen (i.e. hydrogen from a hydrogen storage system such as a storage tank), and the backflow inlet 113 is used for receiving low-pressure secondary hydrogen (i.e. unreacted hydrogen flowing out of the stack and needing to be recycled). The primary hydrogen uses high flow rate to generate negative pressure to eject the secondary hydrogen, and the two hydrogen streams are mixed to form medium-pressure hydrogen, which is discharged from the ejector outlet 112 to the stack for reaction to generate electricity.

[0044] The left side and the right side of the ejector body 10 are respectively provided with the left manifold plate 20 and the right manifold plate 30. The left manifold plate 20 and the right manifold plate 30 are both used for connecting the stack and the ejector body 10 of the present application, and the left manifold plate 20 and the right manifold plate 30 are both provided with hydrogen channels, air channels and cooling liquid channels to integrate the flow channels of each flow medium of the stack.

[0045] The left manifold plate 20 is arranged at the side of the ejector outlet 112 of the ejector body 10, i.e. close to the outside of the ejector outlet 112, and its hydrogen channel is connected with the ejector outlet 112. The ejector body 10 supplies gas to the hydrogen inlet of the stack through the hydrogen channel of the left manifold plate 20. The right manifold plate 30 is arranged at the side opposite to the left manifold plate 20 of the ejector body 10, i.e. at the opposite side of the left manifold plate 20, and is close to the ejector inlet of the ejector body 10, and its hydrogen channel is used for connecting the hydrogen outlet of the stack. The stack introduces backflow hydrogen to the ejector body 10 through the hydrogen channel of the right manifold plate 30. The right manifold plate 30 is also provided with a gas-liquid separation cavity 36 and a water tank 37, and the hydrogen channel of the right manifold plate 30 passes through the gas-liquid separation cavity 36 and the water tank 37, so that the backflow hydrogen can also realize gas-liquid separation.

[0046] The hydrogen circulation pump 40 is arranged at the side of the backflow inlet 113 of the ejector body 10, the hydrogen inlet of the hydrogen circulation pump 40 is connected with the outlet of the hydrogen channel of the right manifold plate 30, and the hydrogen outlet of the hydrogen circulation pump 40 is connected with the backflow inlet 113 of the ejector body 10.

[0047] By the above structural design, the left bus plate 20, the right bus plate 30 and the hydrogen circulation pump 40 are arranged on the basis of the ejector body 10, the connection of the ejector device and the stack is realized by means of the left bus plate 20 and the right bus plate 30, and the hydrogen, air and cooling liquid pipes required at the inlet and outlet sides of the stack are integrated. Meanwhile, the gas-liquid separation chamber 36 and the water tank 37 are integrated on the hydrogen passage of the right bus plate 30, so that the gas-liquid separation of hydrogen can be realized. Moreover, the hydrogen passage of the right bus plate 30 is connected with the hydrogen circulation pump 40, and the hydrogen circulation pump 40 is connected with the backflow inlet 113 of the ejector body 10, so that the series connection of the ejector body 10 and the hydrogen circulation pump 40 is realized, different pressure rises can be borne between the ejector body 10 and the hydrogen circulation pump 40, so as to adapt to different power requirements of the fuel cell system under different working conditions. The integrated ejector device has simple structure, high integration degree and more perfect functions.

[0048] In the application, the series connection of the ejector body 10 and the hydrogen circulation pump 40 can improve the hydrogen supply stability in the full power range of the fuel cell system, so as to improve the reaction power generation effect. Specifically, the ejector body 10 adopts a passive ejecting mode to suck the backflow hydrogen, the ejector chamber 11 in the form of a Venturi tube can adapt to the medium and high power operation conditions of the fuel cell system, has the advantages of simple structure, small space occupation and no parasitic power due to no working element. The hydrogen circulation pump 40 actively pumps the backflow hydrogen by doing work to make up for the disadvantage that the structure of the ejector body 10 cannot cover the low power working range of the stack for ejecting. Therefore, in the application, the hydrogen circulation pump 40 and the ejector can bear different pressure rise roles. When the stack is in low power operation, the hydrogen circulation pump 40 mainly pressurizes the backflow hydrogen to supply the hydrogen consumption under low reaction degree; when the stack is in medium and high power operation, the ejector body 10 mainly pressurizes the backflow hydrogen to realize the backflow of the backflow hydrogen by using high-speed and high-flow hydrogen. Therefore, the ejecting effect of the ejector device in the application is improved in the full power range of the stack.

[0049] In some embodiments of the present application, as shown in FIG. 5, the ejector body 10 is provided with an ejector nozzle 12 inserted into the ejector cavity 11. The ejector nozzle 12 comprises a sealing section 121, a fitting section 122, a backflow section 123 and a nozzle section 124 arranged in sequence. A sealing structure is arranged between the sealing section 121 and the ejector cavity 11 to achieve overall sealing between the ejector cavity 11 and the ejector nozzle 12. The outer diameter of the fitting section 122 is consistent with the inner diameter of the ejector cavity 11, and the two are arranged in close contact, thereby improving the stability of the ejector nozzle 12 in the ejector cavity 11, making the structure stable and not easy to damage, and at the same time inhibiting the slight displacement of the jet point of the ejector nozzle 12 due to vibration to improve jet stability. The backflow section 123 is stepped and narrowed between the fitting section 122, and compared with the fitting section 122, the backflow section 123 can be away from the ejector cavity 11 to form a backflow cavity, which provides an ejecting space for the backflow hydrogen. As shown in FIG. 5, when the ejector nozzle 12 ejects high-speed hydrogen, the backflow cavity behind the nozzle section 124 will generate negative pressure due to gas loss. The backflow inlet 113 is arranged at the position of the backflow cavity and communicates with the backflow cavity, so that the backflow hydrogen from the hydrogen circulating pump 40 can smoothly enter the ejector cavity 11.

[0050] In some embodiments of the present application, as shown in FIGS. 2, 6, 9 and 10, the ejector body 10 is further provided with a flow control valve 13. The sealing section 121 of the ejector nozzle 12 is provided with a nozzle groove 1211, and the valve body of the flow control valve 13 is shaped to fit the nozzle groove 1211, and a sealing structure is arranged between the two. The ejector inlet 111 is arranged on the sealing section 121 and extends through the nozzle groove 1211 to the gas inlet of the flow control valve 13, and the gas outlet of the flow control valve 13 communicates with the gas conveying pipe of the ejector nozzle 12. The present application integrates the flow control valve 13 in the ejector body 10, which can also achieve flow control of the ejector and integrate the flow control function and the ejecting function.

[0051] As shown in FIG. 10, the sealing structure between the flow control valve 13 and the nozzle groove 1211 is a sealing ring 131 arranged in multiple sections, which can be made of rubber or other materials. Corresponding to the sealing ring 131, the flow control valve 13 can be provided with a snap ring or other fixing structure for fixing the sealing ring 131.

[0052] In some embodiments of the present application, as shown in FIG. 3 and FIG. 4, the water tank 37 of the right busbar 30 is arranged below the gas-liquid separation chamber 36, and a plurality of baffles 361 arranged vertically are arranged in the gas-liquid separation chamber 36, and opposite ends of adjacent baffles 361 are provided with gas passages, that is, in the continuously arranged baffles 361, gaps are alternately formed at the upper end or the lower end to form gas passages. Thus, the gas flow is bent as shown by the dashed arrows in FIG. 3. The backflow hydrogen gas mixed with more moisture due to the oxidation reaction, and the baffles 361 block the flow of backflow hydrogen gas, so that the reaction water in the gas flow condenses and gathers in the water tank 37 for separation and collection.

[0053] In some embodiments of the present application, as shown in FIG. 1, FIG. 3 and FIG. 4, the left busbar 20 includes a left air inlet 21, a left air outlet 22, a left coolant inlet 23, a left coolant outlet 24 and a left hydrogen gas outlet 25. The right busbar 30 includes a right air inlet 31, a right air outlet 32, a right coolant inlet 33, a right coolant outlet 34 and a right hydrogen gas inlet 35. The hydrogen gas inlet of the hydrogen gas passage of the right busbar 30, that is, the right hydrogen gas inlet 35, is arranged on the back surface of the plate body of the right busbar 30, that is, the opposite surface of the structure surface shown in FIG. 1, corresponding to A shown in FIG. 3. The hydrogen gas outlet of the hydrogen gas passage of the right busbar 30 is arranged on the front surface of the plate body of the right busbar 30, corresponding to B shown in FIG. 3. The hydrogen circulation pump 40 is arranged on the front surface of the ejector body 10 to connect the hydrogen gas outlet of the hydrogen gas passage of the right busbar 30. In the present application, the hydrogen circulation pump 40 is arranged on the front surface of the ejector body 10, and the interface connecting the hydrogen circulation pipeline of the stack is arranged on the back surface of the plate body, which is beneficial to scientific realization of the layout of parts, effective use of space and avoidance of structural interference between the stack and the hydrogen circulation pump 40.

[0054] In some embodiments of the present application, on the left busbar 20 and the right busbar 30, the connection ports of each hydrogen gas passage, each air passage and each coolant passage with the stack are all arranged on the back surface of the plate body of the busbar where the passage is arranged, so as to facilitate the arrangement of the pipe bundle during installation and the clean and efficient connection between the stack. The integrated ejector device of the present application can make the wire arrangement of the fuel cell system reasonable, reduce the installation and maintenance difficulty of the fuel cell system and improve the production efficiency.

[0055] In some embodiments of the present application, as shown in Figures 1-9, the integrated ejector device of the present application further comprises a hydrogen heat exchanger 50, which is arranged opposite to the backflow inlet 113 of the ejector body 10, and the outlet of the hydrogen heat exchanger 50 is provided with a protruding structure 51 (see Figures 8 and 9), and the ejector inlet 111 of the ejector body 10 is provided with a recess structure 1111, the protruding structure 51 is inserted into the recess structure 1111, and a sealing structure is arranged to achieve the sealed connection between the hydrogen heat exchanger 50 and the ejector inlet 111. The embodiment of the present application integrates the hydrogen heat exchanger 50 on the ejector body 10, which adds heating function to the primary hydrogen, and also concentrates the layout of components, solving the problems of a large number of separate independent components, loose distribution, and large space occupation. Preferably, the top of the hydrogen heat exchanger 50 is provided with a hydrogen inlet 54, so that the primary hydrogen flows downward through the heat exchange channel and then enters the ejector body 10, ensuring sufficient heat exchange.

[0056] In some embodiments of the present application, the cooling liquid channel of the right busbar 30 is provided with a cooling liquid leading branch, the cooling liquid channel of the left busbar 20 is provided with a cooling liquid backflow branch, the hot medium inlet of the hydrogen heat exchanger 50 is connected to the cooling liquid leading branch through a water leading pipe 52, and the hot medium outlet of the hydrogen heat exchanger 50 is connected to the cooling liquid backflow branch through a water outlet pipe 53, so as to obtain the outflowing cooling liquid from the stack for heat exchange. In the present application, the hydrogen heat exchanger 50 is integrated with the cooling liquid channel by using the left busbar 20 and the right busbar 30, which shortens the length of the pipeline for leading the stack cooling liquid into the hydrogen heat exchanger 50 in the fuel cell, realizes the simplified flow guide and efficient waste heat utilization of the stack cooling liquid, and has higher heat exchange efficiency and energy saving.

[0057] In some embodiments of the present application, as shown in the legend of Figure 5, in the ejector body 10, the ejector inlet 111 is arranged above the right side of the ejector body 10, the ejector outlet 112 is arranged on the left side of the ejector body 10, and the backflow inlet 113 is arranged on the lower side of the ejector body 10. Through the layout of different inlet and outlet directions, the separate installation of the left busbar 20, the right busbar 30, the hydrogen circulation pump 40, and the hydrogen heat exchanger 50, etc. on the ejector body 10 is facilitated, so as to more reasonably utilize the space layout to integrate each component, so that the functions of the primary hydrogenation, heating, flow control, and secondary hydrogenation (including passive injection and active pumping) of hydrogen are integrated, the function of the ejector device is improved, and the introduction and outlet pipeline of the cooling liquid to the hydrogen heat exchanger 50 is more simplified, and the heat exchange efficiency is improved.

[0058] In another aspect, the application also discloses a fuel cell system, which comprises a stack and the integrated ejector device according to any one of the above embodiments. The combination of the integrated ejector device and the stack realizes the high integration of the inlet and outlet devices of the stack and the ejector device, perfects the ejector mode, and improves the hydrogen supply stability. In operation, the left busbar is connected with the hydrogen outlet of the ejector body, the hydrogen outlet of the left busbar is connected with the hydrogen inlet of the stack, the hydrogen outlet of the stack is connected with the hydrogen inlet of the right busbar, and the cavity of the right busbar is designed with a gas-liquid separation cavity and a water tank. The hydrogen from the stack passes through the gas-liquid separation cavity, most of the water is separated out and flows into the water tank, and the separated hydrogen enters the hydrogen inlet of the hydrogen circulation pump, realizes secondary pressurization, enters the ejector body, mixes with the primary hydrogen, and enters the stack for reaction and power generation.

[0059] In summary, the technical scheme of the application sets the left busbar, the right busbar and the hydrogen circulation pump on the basis of the ejector body, realizes the connection of the ejector device and the stack by means of the left busbar and the right busbar, can integrate the hydrogen, air and cooling liquid pipelines on the inlet and outlet sides of the stack, integrates the gas-liquid separation cavity and the water tank on the hydrogen channel of the right busbar, connects the hydrogen circulation pump, connects the hydrogen circulation pump with the backflow inlet of the ejector body, realizes the series connection of the ejector body and the hydrogen circulation pump, and makes the ejector body and the hydrogen circulation pump bear different pressure rises, so as to adapt to the different power requirements of the fuel cell system under different working conditions. The structure is simple, the integration degree is high, the function is more perfect, the risk of water flooding of the stack is avoided, and the hydrogen consumption is reduced.

[0060] Some preferred embodiments of the application also integrate the hydrogen heat exchanger and the flow control valve, so as to realize the structural integration of the ejector body, the hydrogen circulation pump, the hydrogen heat exchanger and the flow control valve, simplify the number of parts of the hydrogen supply system, overcome the defects of complex structure and large space occupation of the independent setting of separate parts, and simultaneously integrate the functions of primary hydrogen addition, heating, flow control and secondary hydrogen addition (including passive injection and active pumping), realize the diversified setting of the hydrogen supply system function, and perfect the function of the ejector device.

[0061] The above is only the preferred embodiment of the application and is not used to limit the application. For those skilled in the art, the application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An integrated ejector apparatus, characterized by, The ejector body (10), the left manifold plate (20), the right manifold plate (30) and the hydrogen circulation pump (40) are integrated on the ejector body (10). The ejector body (10) is provided with an ejector cavity (11), an ejector inlet (111), an ejector outlet (112) and a backflow inlet (113), and the ejector inlet (111), the ejector outlet (112) and the backflow inlet (113) are in communication with the ejector cavity (11). The left manifold plate (20) and the right manifold plate (30) are used for connecting the stack and the ejector body (10), and are provided with hydrogen channels, air channels and cooling liquid channels. The left manifold plate (20) is arranged at the ejector outlet (112) side of the ejector body (10), and the hydrogen channel of the left manifold plate (20) is connected with the ejector outlet (112); the right manifold plate (30) is arranged at the side of the ejector body (10) opposite to the left manifold plate (20), and is further provided with a gas-liquid separation cavity (36) and a water tank (37), and the hydrogen channel of the right manifold plate (30) passes through the gas-liquid separation cavity (36) and the water tank (37). The hydrogen circulation pump (40) is arranged at the backflow inlet (113) side of the ejector body (10), the hydrogen inlet of the hydrogen circulation pump (40) is connected with the outlet of the hydrogen channel of the right manifold plate (30), and the hydrogen outlet of the hydrogen circulation pump (40) is connected with the backflow inlet (113) of the ejector body (10). The ejector body (10) is provided with an ejector nozzle (12) inserted in the ejector cavity (11); the ejector nozzle (12) comprises a sealing section (121), a fitting section (122), a backflow section (123) and a nozzle section (124) arranged in sequence; a sealing structure is arranged between the sealing section (121) and the ejector cavity (11); the outer diameter size of the fitting section (122) is consistent with the inner diameter of the ejector cavity (11), and the two are arranged in mutual fitting; the backflow section (123) and the fitting section (122) are stepped and narrowed, so as to form a backflow cavity between the backflow section (123) and the ejector cavity (11); the backflow inlet (113) is arranged at the position of the backflow cavity and is in communication with the backflow cavity.

2. The integrated ejector apparatus of claim 1, wherein The flow control valve (13) is further arranged in the ejector body (10).

3. The integrated ejector apparatus of claim 2, wherein ​ The sealing section (121) of the ejector nozzle (12) is internally provided with a nozzle groove (1211), the valve body of the flow control valve (13) is in conformal fit with the nozzle groove (1211), and a sealing structure is arranged between the two; the ejector inlet (111) is arranged on the sealing section (121) and extends through the nozzle groove (1211) to the gas inlet of the flow control valve (13), and the gas outlet of the flow control valve (13) communicates with the gas conveying pipe of the ejector nozzle (12).

4. The integrated ejector apparatus of claim 1, wherein The water tank (37) of the right busbar (30) is arranged below the gas-liquid separation chamber (36), and a plurality of baffles (361) are arranged in the gas-liquid separation chamber (36), and gas passages are arranged at opposite ends of adjacent baffles (361).

5. The integrated ejector apparatus of claim 1, wherein The hydrogen inlet of the hydrogen passage of the right busbar (30) is arranged at the back of the plate body, the hydrogen outlet of the hydrogen passage of the right busbar (30) is arranged at the front of the plate body, and the hydrogen circulation pump (40) is arranged at the front of the ejector body (10) to connect the hydrogen outlet of the hydrogen passage of the right busbar (30).

6. The integrated ejector apparatus of claim 5, wherein On the left busbar (20) and the right busbar (30), the connection ports of the hydrogen passages, the connection ports of the air passages, and the connection ports of the cooling liquid passages with the stack are all arranged at the back of the corresponding busbar plate.

7. The integrated ejector apparatus of claim 1, wherein The integrated ejector device further comprises a hydrogen heat exchanger (50), the hydrogen heat exchanger (50) is arranged on the opposite side of the backflow inlet (113) of the ejector body (10), the outlet of the hydrogen heat exchanger (50) is provided with a protruding structure (51), the ejector inlet (111) of the ejector body (10) is provided with a groove structure (1111), the protruding structure (51) is inserted into the groove structure (1111) and is provided with a sealing structure, thereby realizing the sealed connection between the hydrogen heat exchanger (50) and the ejector inlet (111).

8. The integrated ejector apparatus of claim 7, wherein, The cooling liquid passage of the right busbar (30) is provided with a cooling liquid leading branch, the cooling liquid passage of the left busbar (20) is provided with a cooling liquid backflow branch, the heat medium inlet of the hydrogen heat exchanger (50) communicates with the cooling liquid leading branch, and the heat medium outlet of the hydrogen heat exchanger (50) communicates with the cooling liquid backflow branch.

9. The integrated ejector apparatus of claim 1, wherein, The ejector inlet (111) is arranged above the right side of the ejector body (10), the ejector outlet (112) is arranged on the left side of the ejector body (10), and the backflow inlet (113) is arranged on the lower side of the ejector body (10).

10. A fuel cell system characterized by comprising: The integrated ejector device comprises a stack and any one of claims 1 to 9. The integrated ejector device comprises a stack and any one of claims 1 to 9.

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