Combination manifold for fuel cell and fuel cell assembly with combination manifold

Abstract

The invention relates to the field of fuel cells, in particular to a combined manifold for a fuel cell and a fuel cell assembly with the combined manifold, and the combined manifold comprises a manifold body and a gas-water separator; an air cavity, a cooling water cavity and a hydrogen cavity are formed in the manifold body; the air cavity, the cooling water cavity and the hydrogen cavity are sequentially distributed on the manifold body; the hydrogen cavity is connected with a gas-water separator; the gas-water separator comprises a gas-water separator body and a gas-water separator cover plate; a water distribution structure is arranged in the gas-water separator body; the gas-water separator body and the manifold body are integrally designed; the air cavity, the cooling water cavity and the hydrogen cavity are integrally designed on the manifold body, pipelines connected to the end plate are reduced, disordered distribution of the pipelines on the end plate is avoided, and meanwhile, the manifold body and the gas-water separator body are integrally designed; and the integrity of the combined manifold is ensured.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, in particular to a combined manifold for fuel cells and a fuel cell assembly having the combined manifold. Background Art

[0002] As the global greenhouse effect intensifies, major automakers and new energy companies are looking for a new energy source to replace traditional fuel vehicles. Although pure electric and hybrid vehicles, which are currently in the transition stage, are developing rapidly, they still cannot solve the problems of short mileage and pollution in winter. It was not until the emergence of hydrogen fuel cell systems that the impact of low temperatures on mileage was minimized and zero pollution was achieved.

[0003] The manifold is an important component of the fuel cell system. The rationality of its structural design seriously affects the fluid distribution resistance and overall layout integration of the fuel cell system.

[0004] It is the circulation gathering place of hydrogen, air and water in the fuel cell system, and is responsible for the flow distribution and sealing of water, hydrogen and air; at the same time, it also has to bear the insulation performance of the water channel.

[0005] Manifolds are divided into integral and split types. The integral type has a compact structure and fewer parts, while the split type is flexible and easy to combine, but the number of parts is large, which increases manufacturing costs, and the risk of leakage is also greater.

[0006] At the same time; hydrogen fuel cells use the electrochemical reaction of hydrogen and oxygen to generate electricity and water, achieving zero emissions; and the reactants of hydrogen fuel cells are pure hydrogen and oxygen in the air that react through a proton exchange membrane to generate electricity and water, but during the reaction process, in order to ensure the reaction efficiency, there is a certain excess coefficient of hydrogen, resulting in the actual hydrogen reaction is not sufficient, and part of the hydrogen will be discharged along with the product water. If part of the hydrogen is not utilized, it will cause great waste.

[0007] However, although this part of hydrogen can be used normally, due to its high water content, if it is used directly, it is easy to cause flooding of the fuel cell stack. The existing technology generally uses a gas-water separator to process this part of hydrogen to reduce the water content of this part of hydrogen. However, traditional gas-water separators are mostly baffle-type separators. Although the baffle-type gas-water separator has a certain gas-water separation effect, in order to ensure separation efficiency and separation quality, the overall size of the baffle-type separator is large, and there are many separate plates arranged, which is not conducive to optimized integration.

[0008] For example, patent: 202210367621.8 - A gas-water separator, a fuel cell water management system and a method disclosed.

[0009] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing manifold structure. Summary of the invention

[0010] The object of the present invention is to provide a combined manifold with a high degree of integration.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is:

[0012] A combined manifold for a fuel cell, comprising a manifold body and a gas-water separator;

[0013] The manifold body is provided with an air cavity, a cooling water cavity and a hydrogen cavity; the air cavity, the cooling water cavity and the hydrogen cavity are distributed in sequence on the manifold body;

[0014] The hydrogen cavity is connected to a gas-water separator; the gas-water separator comprises a gas-water separator body and a gas-water separator cover plate; a water separation structure is provided inside the gas-water separator body;

[0015] The gas-water separator body and the manifold body are of integrated design.

[0016] The air cavity is connected with an air inlet stop valve sealing ring and an air inlet joint; the air cavity is connected with the air inlet stop valve and the air inlet joint in sequence through the air inlet stop valve sealing ring.

[0017] An air path temperature sensor and a pressure sensor are installed on the air inlet joint.

[0018] The manifold body comprises a manifold plate body, on which an air block and a water channel block are arranged; the air cavity is arranged through the manifold plate body and the air block;

[0019] The cooling water chamber extends from the manifold plate body to the water channel block;

[0020] The cross-sections of the air cavity and the cooling water cavity close to one end of the manifold plate body are irregularly shaped;

[0021] The cross-sections of the air cavity and the cooling water cavity away from one end of the manifold plate body are circular; the air cavity and the cooling water cavity both smoothly transition from irregular cross-sections to circular cross-sections.

[0022] The water channel block is connected with a water channel inlet joint; the water channel inlet joint is located on the side of the water channel block.

[0023] The hydrogen cavity is arranged below the cooling water cavity, and the hydrogen cavity is arranged obliquely, and the hydrogen cavity obliquely extends downward to the hydrogen inlet of the gas-water separator body;

[0024] The gas-water separator body is provided with a hydrogen inlet, a hydrogen outlet and a water drain; the hydrogen inlet, the hydrogen outlet and the water drain are distributed in an interval and staggered manner on the gas-water separator body.

[0025] A hydrogen temperature sensor installation port is arranged between the hydrogen cavity and the hydrogen inlet.

[0026] The gas-water separator cover plate is provided with a nitrogen exhaust valve installation port, and the cross section of the nitrogen exhaust valve installation port is funnel-shaped; the water separation structure includes a vortex water separation mechanism and / or a baffle water separation mechanism arranged in the gas-water separator body.

[0027] The combined manifold is formed by injection molding.

[0028] A fuel cell assembly comprises an air side end plate, on which a combined manifold for the fuel cell is arranged.

[0029] The advantages of the present invention are:

[0030] The invention discloses a combined manifold for a fuel cell and a fuel cell assembly having the combined manifold.

[0031] The present invention integrates the air cavity, cooling water cavity and hydrogen cavity on the manifold body, reduces the pipes connected on the end plate, and avoids the disorder of the pipe distribution on the end plate. At the same time, the manifold body and the gas-water separator body disclosed in the present invention are integrated into one design, ensuring the integrity of the combined manifold.

[0032] At the same time, the setting of the gas-water separator and the use of the vortex water separation mechanism and / or the baffle water separation mechanism in the present invention can separate the water vapor, nitrogen and hydrogen of the unreacted hydrogen in the hydrogen fuel cell, which can better reduce the humidity of the hydrogen and increase the subsequent recovered hydrogen concentration; so as to complete the subsequent recovery and utilization of the hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0034] Figure 1 It is the installation diagram of the combined manifold in the present invention;

[0035] Figure 2 It is an exploded view of the installation of the combined manifold in the present invention;

[0036] Figure 3 It is a structural diagram of the combined manifold in the present invention from the first perspective;

[0037] Figure 4 A structural diagram of the combined manifold from a second viewing angle in the present invention;

[0038] Figure 5 It is a partial cross-sectional view of the nitrogen discharge port of the gas-water separator cover plate in the present invention;

[0039] Figure 6 Axonometric view of the second embodiment of the gas-water separator of the present invention Figure 1 ;

[0040] Figure 7 Axonometric view of the second embodiment of the gas-water separator of the present invention Figure 2 ;

[0041] Figure 8 It is a cross-sectional view of the flow channel in the gas-water separator of the present invention;

[0042] Fig. 9 It is a flow line diagram of the hydrogen recovery flow channel of the gas-water separator in the present invention;

[0043] Fig.10 It is a partial view of the vortex water separation area A of the second embodiment of the gas-water separator in the present invention;

[0044] Fig.11 It is an axonometric view of the vortex water separation area A of the second embodiment of the gas-water separator in the present invention;

[0045] Fig.12 It is an axonometric view of a gas-water separator according to a second embodiment of the gas-water separator of the present invention;

[0046] Fig.13 The gas-water separator body of the second embodiment of the gas-water separator in the present invention;

[0047] Fig.14 This is the gas-water separator cover plate of the second embodiment of the gas-water separator in the present invention.

[0048] The marks in the above figures are: 101, stack end plate; 102, combined manifold; 103, gas-water separator; 104, air inlet shut-off valve; 105, gas stack inlet connector; 106, water inlet connector; 107, nitrogen exhaust valve; 108, heating and water drainage solenoid valve; 1010, water circuit temperature and pressure integrated sensor; 1011, air temperature sensor; 1012, air pressure sensor; 1013, hydrogen temperature sensor; 1014, gas-water separator sealing ring; 1015, cooling water chamber inlet sealing ring; 1016, air Sealing ring of the stop valve for entering the stack; 1017, sealing ring of the manifold; 1018, outlet of the nitrogen exhaust valve of the gas-water separator cover; 1019, air cavity; 1020, cooling water cavity, 1021, hydrogen cavity; 1022, installation port of the integrated temperature and pressure sensor of the water circuit; 1023, water circuit inlet; 1024, hydrogen outlet of the gas-water separator; 1025, water return port of the gas-water separator; 1026, installation port of the heating solenoid valve of the water separation device; 1027, installation port of the hydrogen temperature sensor, 1028, installation port of the hydrogen pressure sensor; 1031, separation baffle;

[0049] 1-nitrogen discharge port of water separator; 2-temperature sensor; 3-gas-water separator cover; 4-pressure sensor; 5-gas-water separator body; 6-bolt; 7-fixing bolt; 9-gas-water separator drain port; 10-sealing ring; 11-hydrogen inlet; 12-hydrogen outlet; 13-drain valve; 14-nitrogen discharge valve. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0051] A combined manifold 102 for a fuel cell comprises a manifold body and a gas-water separator 103; the manifold body 10-1 is provided with an air cavity 1019, a cooling water cavity 1020 and a hydrogen cavity 1021; the air cavity 1019, the cooling water cavity 1020 and the hydrogen cavity 1021 are sequentially distributed on the manifold body; the hydrogen cavity 1021 is connected to the gas-water separator 103; the gas-water separator 103 comprises a gas-water separator body 5 and a gas-water separator cover plate 3; the gas-water separator body 5 is provided with a water separation structure; the gas-water separator body 5 and the manifold body are of an integrated design; the present invention integrates the air cavity 1019, the cooling water cavity 1020 and the hydrogen cavity 1021 ... The cooling water chamber 1020 and the hydrogen chamber 1021 are integrated on the manifold body 10-1, which reduces the pipes connected to the end plate 101 and avoids the disorder of the pipe distribution on the end plate 101. At the same time, the manifold body 10-1 and the gas-water separator body 5 disclosed in the present invention are integrated into one design, thereby ensuring the integrity of the combined manifold 102. At the same time, the gas-water separator 103 is arranged. The present invention can separate water vapor, nitrogen and hydrogen from the unreacted hydrogen of the hydrogen fuel cell through the use of a vortex water separation mechanism and / or a baffle water separation mechanism, thereby better reducing the humidity of the hydrogen and increasing the concentration of the subsequently recovered hydrogen, so as to complete the subsequent recovery and utilization of the hydrogen.

[0052] The combined manifold 102 disclosed in the present invention is mainly arranged on the end plate 101 at the air end, mainly to realize the centralized arrangement of pipelines on the end plate 101, realize a more integrated design of the fuel cell, and at the same time reduce the space occupied by the fuel cell to avoid the messy arrangement of the fuel cell and related pipelines.

[0053] specific:

[0054] The combined manifold 102 disclosed in the present invention mainly includes a manifold body and a gas-water separator 103; the manifold body 10-1 is mainly used for exhausting hydrogen, supplying air and supplying cooling water.

[0055] In the present invention, an air cavity 1019, a cooling water cavity 1020 and a hydrogen cavity 1021 are provided on the manifold body 10-1; the air cavity 1019, the cooling water cavity 1020 and the hydrogen cavity 1021 are distributed in sequence on the manifold body; in the present invention, the air cavity 1019, the cooling water cavity 1020 and the hydrogen cavity 1021 are distributed in sequence from the top to the bottom of the manifold body 10-1, as shown in the accompanying drawings; based on such a setting, the pipes connected to the end plate 101 are reduced, avoiding the disorderly distribution of the pipes on the end plate 101.

[0056] At the same time, in the present invention, the hydrogen chamber 1021 is connected to the gas-water separator 103; the gas-water separator 103 plays a good gas-water separation role. In subsequent use, the hydrogen discharged from the fuel cell stack can be gas-water diverted, and the unreacted hydrogen of the hydrogen fuel cell can be separated from water vapor, nitrogen and hydrogen, which can better reduce the humidity of the hydrogen and increase the subsequent recovered hydrogen concentration.

[0057] In addition, the gas-water separator 103 in the present invention includes a gas-water separator body 5 and a gas-water separator cover plate 3; the gas-water separator body 5 and the gas-water separator cover plate 3 form a box structure with a chamber.

[0058] At the same time, a water separation structure is provided inside the gas-water separator body 5 described in the present invention; the water separation structure of the present invention is mainly used for separating hydrogen from water liquid, and the hydrogen exhausted from the fuel cell stack enters the gas-water separator body 5 from the hydrogen inlet, and then the gas and water are separated by the water separation mechanism; the water separation structure disclosed in the present invention is mainly a plate structure, so that the gas and water collide on the plate, so that the gas-water separation of the water-carrying hydrogen can be realized again, which can better reduce the humidity of the hydrogen and improve the subsequent recovered hydrogen concentration.

[0059] In the present invention, the gas-water separator body 5 and the manifold body are of integrated design; the manifold body 10 - 1 disclosed in the present invention and the gas-water separator body 5 are of integrated design; the integrity of the combined manifold 102 is ensured.

[0060] Furthermore, in the present invention, the air cavity 1019 is connected to an air inlet shut-off valve sealing ring 1016 and an air inlet joint 105; the air cavity 1019 is connected to the air inlet shut-off valve 104 and the air inlet joint 105 in sequence through the air inlet shut-off valve sealing ring 1016; based on such a setting, it is convenient to control the flow rate of air entering the stack, and at the same time, through the setting of the air inlet shut-off valve sealing ring 1016, the sealing of the connection between the air cavity 1019 and the air inlet shut-off valve 104 and the air inlet joint 105 is ensured.

[0061] Furthermore, in the present invention, an air path temperature sensor 1011 and a pressure sensor are installed on the air inlet joint 105; based on such a setting, it is convenient to monitor the air temperature and air pressure; the pressure sensor is installed on the air-water separator body through the pressure sensor installation port 1028.

[0062] At the same time, in the present invention, the manifold body 10-1 includes a manifold plate body, on which an air block and a water channel block are provided; the air cavity 1019 runs through the manifold plate body and the air block; in the present invention, the manifold plate body mainly acts as a connecting plate body, which facilitates the connection and installation between the manifold body 10-1 and the end plate 101 during subsequent use. At the same time, in the present invention, the setting of the air block and the water channel block are equivalent to setting a protrusion on the manifold plate body, which can not only ensure the structural strength of the manifold body 10-1 itself, but also ensure the corresponding air cavity 1019 and cooling water cavity 1020 on the manifold body 10-1.

[0063] At the same time, more importantly, the air block and water block disclosed in the present invention facilitate the subsequent modification of the layout of the air supply pipeline and the water pipeline as needed, thereby reducing the interference in the installation of components.

[0064] In addition, in the present invention, the air cavity 1019 is arranged to penetrate the manifold plate body and the air block; the cooling water cavity 1020 extends from the manifold plate body to the water channel block; such an arrangement facilitates installation on the manifold body 10-1.

[0065] In addition, in the present invention, the cross-sections of the air cavity 1019 and the cooling water cavity 1020 close to one end of the manifold plate body are irregular; the cross-sections of the air cavity 1019 and the cooling water cavity 1020 away from one end of the manifold plate body are circular; the air cavity 1019 and the cooling water cavity 1020 are both smoothly transitioned from irregular cross-sections to circular cross-sections; in essence, the air cavity 1019 and the cooling water cavity 1020 are smoothly transitioned from irregular openings to circular openings through variable cross-section design, which not only reduces fluid resistance but also facilitates external pipeline connection.

[0066] Furthermore, in the present invention, the water channel block is connected to a water channel inlet joint 106; the setting of the water channel inlet joint 106 facilitates the subsequent connection and installation with the water supply pipeline. At the same time, in the present invention, the water channel inlet joint 106 is located on the side of the water channel block; based on such a setting, the installation interference between the water channel inlet joint 106 and adjacent components can be reduced; in the present invention, the side opening of the water channel block forms a water channel inlet 1023; it is convenient for the subsequent water channel inlet joint to supply water to the cooling water chamber.

[0067] Furthermore, in the present invention, the hydrogen chamber 1021 is arranged below the cooling water chamber 1020, and the hydrogen chamber 1021 is arranged at an angle, and the hydrogen chamber 1021 extends downward at an angle to the hydrogen inlet of the gas-water separator body 5; through such an arrangement, the present invention not only facilitates the transfer of hydrogen discharged from the manifold body 10-1 to the gas-water separator 103, but also avoids the accumulation of water in the hydrogen chamber 1021, and also avoids the accumulation of water at the end of the fuel cell stack.

[0068] At the same time, a hydrogen inlet, a hydrogen outlet and a drain are provided on the gas-water separator body 5 in the present invention; the hydrogen inlet, the hydrogen outlet and the drain are distributed in an interval and staggered manner on the gas-water separator body 5; at the same time, a hydrogen inlet, a hydrogen outlet and a drain are provided on the gas-water separator body 5 in the present invention; the hydrogen inlet, the hydrogen outlet and the drain are distributed in an interval and staggered manner on the gas-water separator body 5; the hydrogen inlet is used to be connected to the hydrogen outlet of the fuel cell stack, and the hydrogen outlet on the above-mentioned gas-water separator body 5 is used to discharge the hydrogen after gas-water separation, which is convenient for subsequent recycling, and the drain is used to discharge the separated water liquid after gas-water separation in the gas-water separator body 5.

[0069] Furthermore, in the present invention, a hydrogen temperature sensor installation port 1027 is provided between the hydrogen cavity 1021 and the hydrogen inlet; when the hydrogen temperature sensor installation port 1027 is actually used, a corresponding hydrogen temperature sensor 1013 is installed in the hydrogen temperature sensor installation port 1027; this facilitates temperature detection of the hydrogen entering the gas-water separator 103 during subsequent use.

[0070] Furthermore, in the present invention, a nitrogen exhaust valve installation port 1018 is provided on the gas-water separator cover plate 3, and the cross-section of the nitrogen exhaust valve installation port 1018 is funnel-shaped; in the present invention, the cross-section of the nitrogen exhaust valve installation port 1018 is designed to be funnel-shaped, which is beneficial to prevent the water vapor in the nitrogen from gathering and icing and clogging in a low-temperature environment.

[0071] The water separation structure described in the present invention includes a vortex water separation mechanism and / or a baffle water separation mechanism arranged in the gas-water separator body 5; the present invention can separate water vapor, nitrogen and hydrogen from the unreacted hydrogen of the hydrogen fuel cell through the coordinated use of the vortex water separation mechanism and the baffle water separation mechanism to complete the subsequent hydrogen recovery and utilization; at the same time, the vortex water separation mechanism disclosed in the present invention is equivalent to using centrifugal force to achieve gas-water separation, thereby ensuring the initial gas-water separation efficiency, and at the same time, the baffle water separation mechanism is used to extend the hydrogen flow path and increase the collision probability, so that the gas-water separation of water-carrying hydrogen can be achieved again. Through the coordinated use of the vortex water separation mechanism and the baffle water separation mechanism, the hydrogen humidity can be better reduced and the subsequent recovered hydrogen concentration can be improved.

[0072] Furthermore, in the present invention, the combined manifold 102 is formed by injection molding; in the present invention, the combined manifold can be formed by injection molding using non-metallic materials such as PPS+30% GF, PEEK, and PA66+30% GF.

[0073] A fuel cell assembly includes an air side end plate 101, on which a combined manifold 102 for the fuel cell is provided; during actual installation and connection, the air side end plate 101 and the combined manifold are connected to each other by bolts; a manifold sealing ring 1017 is provided between the air side end plate 101 and the combined manifold; the tightness of the connection between the air side end plate 101 and the combined manifold is well ensured.

[0074] specific:

[0075] The present invention discloses a combined manifold 102 for a fuel cell and a fuel cell assembly having the combined manifold.

[0076] The present invention designs the air, water and hydrogen paths into an integrated manifold, and integrates the gas-water separator 103 and several sensor installation ports; optimizes the structure of the fuel cell system manifold and the integrated layout of the fuel cell system to improve the degree of system integration.

[0077] The integrated moisture combination manifold of the hydrogen fuel cell system of the present invention is designed with water, hydrogen and air channels respectively, and integrated with installation ports such as water channel temperature and pressure integrated sensor, hydrogen low-pressure temperature sensor, air pressure sensor, etc., and further integrates the hydrogen channel with the gas-water separator 103 to design an integrated solution.

[0078] The specific plan includes the following steps:

[0079] The combined manifold of the present invention is designed to have a regular circular outlet at its outlet end through a smooth variable cross-section design according to the special-shaped cross-sections of the air cavity 1019 and the cooling water cavity 1020 at the outlet end face of the stack, which helps to reduce fluid resistance and facilitates external pipeline design.

[0080] The sealing structure connecting the hydrogen chamber 1021, the cooling water chamber 1020, the air chamber 1019 of the combined manifold and the stack mounting surface is designed to be integral.

[0081] The combined manifold of the present invention is integrated with the gas-water separator 103, and the hydrogen outlet channel of the hydrogen cavity 1021 on the manifold body 10-1 is directly connected to the gas-water separator 103; the gas-water separator cover plate 3 is integrated with the installation port 1018 of the drain valve and the nitrogen exhaust valve.

[0082] The combined manifold of the present invention integrates the sensor installation ports required for the three circuits of air, water and hydrogen, such as: a water circuit temperature and pressure integrated sensor, a hydrogen low-pressure temperature sensor, an air pressure sensor 1012, etc.

[0083] The combined manifold of the present invention is made by adopting the injection molding process of non-metallic materials.

[0084] The combined manifold cooling water channel of the present invention adopts a split solution to facilitate the implementation of the installation process.

[0085] The combined manifold disclosed in the present invention includes an air cavity 1019, a cooling water cavity 1020 and a hydrogen cavity 1021, and the three cavities are connected in sequence. The air cavity 1019 and the cooling water cavity 1020 are smoothly rounded into circular openings through a variable cross-section design, which reduces fluid resistance and facilitates external pipeline connection.

[0086] The outer side of the combined manifold air cavity 1019 is sealedly connected to the air inlet shut-off valve 104 and the air inlet joint 105 in sequence through the air inlet shut-off valve sealing ring 1016, and the air path temperature sensor 1011 and the pressure sensor are integrated and installed on the air path inlet joint.

[0087] The combined manifold cooling water chamber 1020 adopts a split design, and the cooling chamber inlet is set on the left side, and is sealed and connected to the water channel inlet joint 106 through the cooling water chamber inlet sealing ring 1015; a mounting port for the temperature and pressure integrated sensor 1010 is set below the cooling chamber, and the cooling channel temperature and pressure integrated sensor 1010 has its own sealing ring which is pressed onto the cooling water channel temperature and pressure integrated sensor mounting port 1022 by bolts through the cover plate.

[0088] The combined manifold hydrogen chamber 1021 is arranged below the cooling water chamber 1020. The hydrogen chamber 1021 extends obliquely downward to the hydrogen inlet. A hydrogen temperature sensor installation port 1027 is arranged between the hydrogen chamber 1021 and the inlet of the water separation device for monitoring the temperature of the hydrogen out of the stack.

[0089] The three chambers of the combined manifold are fitted with the stack end plate 101, and the combined manifold sealing ring 1017 adopts an integral structural design.

[0090] Meanwhile, in the present invention, the gas-water separator 103 is integrated in the combined manifold design.

[0091] The channel of the hydrogen chamber 1021 is tilted downward and connected to the hydrogen inlet of the gas-water separator 103; a hydrogen pressure sensor installation port is provided on the top of the gas-water separator 103 for monitoring the hydrogen pressure out of the stack.

[0092] A water separation baffle 1031 is provided in the gas-water separator 103. When hydrogen enters from the hydrogen inlet and impacts the water separation baffle 1031, the hydrogen is separated from the water vapor. The separated hydrogen flows out through the hydrogen outlet of the gas-water separator. The water vapor adheres to the water separation baffle 1031 and continuously gathers into water droplets and is then discharged through the drain outlet of the gas-water separator 103.

[0093] The location and number of the water-dividing baffle 1031 are selected according to the design requirements. In actual use, the water-dividing baffle is also called vortex water-dividing baffle 1-11, bottom baffle, first side plate, second side plate and transverse water-dividing baffle according to its location and function.

[0094] A gas-water separator water return port 1025 is provided below the hydrogen outlet of the gas-water separator. Both the gas-water separator hydrogen outlet and the gas-water separator water return port 1025 are connected to the hydrogen circulation pump. The secondary flow hydrogen separated from the gas-water separator 103 enters the hydrogen circulation pump and then enters the ejector to mix with the primary flow hydrogen and is then sent to the fuel cell system.

[0095] The residual water vapor of the secondary flow hydrogen entering the hydrogen circulation pump flows through the water return port 1025 of the gas-water separator and flows into the water outlet of the gas-water separator 103 for discharge.

[0096] The gas-water separator 103 is sealed by the gas-water separator cover plate 3 and the gas-water separator sealing ring 1014 .

[0097] A heating drain valve installation port 1026 is provided outside the drain port of the gas-water separator 103. The function of the heating drain valve 108 is to prevent the drain port of the gas-water separator 103 from being frozen and blocked in a low temperature environment.

[0098] A nitrogen exhaust valve installation port 1018 is provided on the gas-water separator cover plate 3; a nitrogen exhaust valve 107 is provided in the nitrogen exhaust valve installation port 1018, and the nitrogen exhaust valve installation port 1018 is designed to be funnel-shaped in cross section to prevent water vapor in nitrogen from accumulating and icing in a low-temperature environment.

[0099] The function of the nitrogen exhaust valve 107 is to promptly discharge the nitrogen that diffuses to the hydrogen side after the air reaction in the fuel cell system. The accumulation of nitrogen on the hydrogen side will cause the hydrogen partial pressure to decrease, thereby causing the single-chip voltage to decrease, and even affect the life of the stack.

[0100] Meanwhile, in addition to providing a separate water-dividing baffle structure, the water-dividing structure in the gas-water separator 103 disclosed in the present invention may also use other structures.

[0101] The present invention can also be used through a vortex water separation mechanism and / or a baffle water separation mechanism to optimize the gas-water separation efficiency of the gas-water separator 103 .

[0102] Specifically, the gas-water separator 103 disclosed in the present invention comprises a gas-water separator body 5; a gas-water separator cover plate 3 is provided on the gas-water separator body 5; a hydrogen inlet 11, a hydrogen outlet 12 and a drain port 9 are provided on the gas-water separator body 5; the hydrogen inlet 11, the hydrogen outlet 12 and the drain port 9 are staggered and distributed at intervals on the gas-water separator body 5; a water separation structure is provided inside the gas-water separator body 5; the water separation structure comprises a vortex water separation mechanism 1-1 and a baffle water separation mechanism 1-2; the hydrogen inlet 11 discharged from the fuel cell stack enters the gas-water separator body 5, and then the gas and water are separated by the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2. Separation; The present invention can separate water vapor, nitrogen and hydrogen from the unreacted hydrogen of the hydrogen fuel cell through the coordinated use of the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2, so as to complete the subsequent hydrogen recovery and utilization; at the same time, the vortex water separation mechanism 1-1 disclosed in the present invention is equivalent to using centrifugal force to achieve gas-water separation, thereby ensuring the initial gas-water separation efficiency, and at the same time, the baffle water separation mechanism 1-2 is used to extend the hydrogen flow path and increase the collision probability, so that the gas-water separation of water-carrying hydrogen can be achieved again. Through the coordinated use of the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2, the hydrogen humidity can be better reduced, and the subsequent recovered hydrogen concentration can be improved.

[0103] specific;

[0104] The gas-water separator 103 for a fuel cell disclosed in the present invention is mainly connected to the hydrogen outlet end of the fuel cell stack, and is mainly used to complete the recovery and utilization of hydrogen. In the present invention, the gas-water separator 103 mainly includes a gas-water separator body 5; a gas-water separator cover plate 3 is provided on the gas-water separator body 5; the gas-water separator body 5 and the gas-water separator cover plate 3 form a box structure with a chamber. At the same time, in the present invention, a hydrogen inlet 11, a hydrogen outlet 12 and a drain port 9 are provided on the gas-water separator body 5; the hydrogen inlet 11, the hydrogen outlet 12 and the drain port 9 are distributed at intervals on the gas-water separator body 5; the hydrogen inlet 11 is used to connect with the hydrogen outlet 12 of the fuel cell stack, and the hydrogen outlet 12 on the gas-water separator body 5 is used to discharge the hydrogen after gas-water separation, which is convenient for subsequent recycling, and the drain port 9 is used to discharge the separated water liquid after gas-water separation in the gas-water separator body 5.

[0105] In the present invention, a water separation structure is provided in the gas-water separator body 5; the water separation structure is mainly used for separating hydrogen from water liquid, and the water separation structure in the present invention includes a vortex water separation mechanism 1-1 and a baffle water separation mechanism 1-2; the hydrogen inlet 11 of the fuel cell stack exhausts hydrogen into the gas-water separator body 5, and then the gas-water separation is carried out through the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2; the vortex water separation mechanism 1-1 disclosed in the present invention is equivalent to using centrifugal force to achieve gas-water separation, ensuring the initial gas-water separation efficiency, and at the same time extending the hydrogen flow path through the baffle water separation mechanism 1-2, increasing the collision probability, so that the gas-water separation of water-carrying hydrogen can be achieved again, and the coordinated use of the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2 can better reduce the humidity of hydrogen and improve the subsequent recovered hydrogen concentration.

[0106] Furthermore, in the present invention, the hydrogen entering the gas-water separator body 5 first contacts the vortex water separation mechanism 1-1 for gas-water separation, and then enters the baffle water separation mechanism 1-2 for gas-water separation again; the present invention is limited by the above, because the vortex water separation mechanism 1-1 of the present invention has a specific distribution mode, so that after the gas and water enter the vortex water separation mechanism 1-1, the gas and water are equivalent to a rotation operation, so that the centrifugal force can be used to achieve a better gas-water separation operation, reduce the gas humidity, and then cooperate with the baffle water separation mechanism 1-2 to better reduce the water content in the gas, thereby ensuring that the hydrogen subsequently entering the hydrogen outlet 12 has a lower humidity and does not have a sufficient concentration.

[0107] Furthermore, in the present invention, the vortex water separation mechanism 1-1 includes a plurality of vortex water separation baffles 1-11, and the plurality of vortex water separation baffles 1-11 are distributed in an intermittent ring shape; here, the plurality of vortex water separation baffles 1-11 are distributed in an intermittent ring shape, and the intermittently distributed vortex water separation baffles 1-11 can facilitate the normal flow of gas and water, while the annularly distributed vortex water separation baffles 1-11 can increase the contact probability with gas and water, and can form a vortex, which facilitates the rotation of gas and water in the area surrounded by each vortex water separation baffle 1-11, thereby realizing the centrifugal separation of gas and water.

[0108] In addition, in the present invention, the number of vortex water dividing baffles 1-11 is generally designed to be 5; of course, more or less can be designed as needed, and the design number is selected according to actual requirements.

[0109] At the same time, the present invention requires that each vortex water-dividing baffle 1-11 is arranged at an angle, such as being distributed like traditional motor fan blades. Such an arrangement can facilitate the generation of vortices during subsequent use and better achieve centrifugal separation of gas and water.

[0110] Furthermore, in the present invention, a vortex water diversion baffle 1-11 is provided with a vortex water guide groove 1-12; each of the vortex water guide grooves 1-12 is arranged at the end of the corresponding vortex water diversion baffle 1-11 away from the hydrogen inlet 11; the present invention facilitates the flow of water on the vortex water diversion baffle 1-11 through the arrangement of the vortex water inversion groove, and facilitates the subsequent collection and flow of the separated water to the drain outlet 9; of course, in the present invention, not every vortex water diversion baffle 1-11 may be provided with a vortex water guide groove 1-12, and the specific number and position of the arrangement can be selected according to design requirements.

[0111] Furthermore, in the present invention, the baffle water-dividing mechanism 1-2 includes a bottom water baffle 1-21, and a lateral water baffle is provided on the bottom water baffle 1-21; the lateral water baffle includes a first lateral plate 1-22 and a second lateral plate 1-23. In the present invention, the bottom water baffle 1-21 plays a longitudinal blocking role, so that the gas and water coming out of the vortex water-dividing mechanism 1-1 can directly impact on the bottom water baffle 1-21 to form an impact diversion, thereby optimizing the gas-water separation effect. In addition, in the present invention, the basic function of the first lateral plate 1-22 and the second lateral plate 1-23 is to act as baffles to optimize the gas-water separation efficiency in the baffle area; and the more important function is to limit the gas flow direction, and the first lateral plate 1-22, the second lateral plate 1-23 and the bottom water baffle 1-21 of the present invention form a water retaining area; that is, a groove structure is formed, which can ensure the retention time of the gas in the baffle water-dividing area and optimize the gas-water separation efficiency.

[0112] At the same time, in the present invention, the first side plate 1-22 and the second side plate 1-23 are both arranged at an angle; the water retaining area is in the shape of a trumpet; such a setting can be equivalent to increasing the size of the baffle area, making it convenient for the gas and water diverted from the vortex water separation area to enter the water retaining area, which can increase the gas-water separation path and optimize the separation effect.

[0113] At the same time, the bottom water baffle plate 1-21 described in the present invention is arc-shaped; the bottom water baffle plate 1-21 protrudes toward one side of the vortex water separation mechanism 1-1; such a setting can increase the area of ​​the bottom water baffle plate 1-21, optimize the contact probability with the water-containing hydrogen coming out of the vortex water separation mechanism 1-1, and better realize gas-water separation through mutual collision; at the same time, the end of the bottom water baffle plate 1-21 described in the present invention is provided with a bottom water leakage groove; the setting of the bottom water leakage groove facilitates the discharge operation of the water liquid on the bottom water baffle plate 1-21.

[0114] At the same time, in the present invention, a lateral water guide groove is provided at one end of the second lateral plate 1-23 close to the bottom water retaining plate 1-21; the lateral water guide groove plays a good circulation role, facilitating the water in the water retaining area to flow to the side of the drain outlet 9.

[0115] In addition, in the present invention, the first lateral plate 1-22 is located below the vortex water separation mechanism 1-1, and the second lateral plate 1-23 is staggered with the vortex water separation mechanism 1-1; based on such a setting, it can better ensure that the water-carrying hydrogen discharged from the vortex water separation mechanism can be more in the above-mentioned water retaining area; at the same time, in the present invention, the height of the first lateral plate 1-22 is less than the height of the second lateral plate 1-23, one end of the first lateral plate 1-22 is connected to the bottom water retaining plate 1-21, and the other end extends to the side close to the vortex water separation mechanism 1-1; one end of the second lateral plate 1-23 is connected to the bottom water retaining plate 1-21, and the other end Free extension, here it is required that the upper edge of the second side plate 1-23 is not lower than the lowest edge of the vortex water separation mechanism 1-1, such a limitation can realize the guidance of the hydrogen flow direction, that is, it can flow to the hydrogen outlet 12 under the guidance of the second side plate 1-23. At the same time, through the above limitation, the hydrogen can reflux in the gas-water separator body 5, that is, the normal flow direction is from the top to the bottom of the gas-water separator body 5, and based on the above limitation, the hydrogen from top to bottom can flow upward again, so that the hydrogen flow path can be increased in the limited space of the gas-water separator body 5, and the gas-water separation effect is optimized.

[0116] In addition, the inclined first side plate 1-22 and the second side plate 1-23 also facilitate the rapid downward discharge of water after impact, thereby avoiding accumulation of water on the first side plate 1-22 and the second side plate 1-23.

[0117] Furthermore, in the present invention, the baffle water distribution mechanism 1-2 also includes a transverse water baffle 1-23, and the transverse water baffle 1-23 is arranged at the hydrogen outlet 12; a transverse water guide groove is provided on the transverse water baffle 1-23; the transverse water baffle 1-23 is above the second lateral plate 1-23, and the basic function of the transverse water baffle 1-23 is to increase the number of hydrogen impacts and optimize the gas-water separation effect. At the same time, the setting of the transverse water guide groove facilitates the flow and discharge of water on the transverse water baffle 1-23.

[0118] In addition, in the present invention, the transverse water baffle 1-23 is located below the hydrogen outlet 12 and is connected to the gas-water separator body 5. The transverse water baffle 1-23 also extends toward the vortex water separation mechanism 1-1. In subsequent use, the transverse water baffle 1-23 is distributed on the side of the outer plate cover. Such a setting serves to block the gas-water separation again.

[0119] In addition, in the present invention, the transverse water baffle 1-23 cooperates with the inner wall of the gas-water separator body 5 around the hydrogen outlet 12 to form a secondary vortex zone at the hydrogen outlet 12, thereby calmly and better reducing the humidity of the outlet hydrogen.

[0120] Furthermore, in the present invention, the gas-water separator 103 also includes an outer plate cover; the outer plate cover is arranged on the vortex water retaining mechanism; the outer plate cover plays a good external protection role, and also plays a good partitioning role, which is convenient for the separation of the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2, and convenient for forming a vortex water separation area and a baffle water separation area, so that based on such a setting, it is convenient to control the hydrogen diversion path.

[0121] At the same time, in the present invention, the outer plate cover includes a bending plate 1-4, and the bending plate 1-4 and the gas-water separator body 5 form a storage space for arranging the vortex water separation mechanism 1-1; the bending plate 1-4 is provided with an upper connecting hole 1-41; the main structure of the bending plate 1-4 is a plate structure. During actual installation, the two ends of the bending plate 1-4 are distributed inside the side wall of the gas-water separator body 5, and the inner side of the bending plate 1-4 is connected to the inner wall of the gas-water separator body 5, thereby realizing the partition operation of the inner cavity of the gas-water separator body 5.

[0122] The arrangement of the upper connecting hole 1-41 facilitates the hydrogen entering through the hydrogen inlet 11 to smoothly enter the vortex water separation mechanism 1-1, thereby achieving centrifugal gas-water separation in the vortex water separation mechanism 1-1.

[0123] Furthermore, in the present invention, the outer plate cover also includes an extension plate 1-3; the extension plate 1-3 acts as a partition bridge. In the present invention, the bending plate 1-4 is connected to the extension plate 1-3, one end of the extension plate 1-3 is connected to the gas-water separator body 5, and the other end is freely extended; the free end of the extension plate 1-3 is spaced apart from the inside of the gas-water separator body 5; the hydrogen inlet 11 and the vortex water separation mechanism 1-1 are distributed on opposite sides of the extension plate 1-3; the extension plate 1-3 is provided with an outer plate guide groove; the vortex water separation baffle 1-11 in the vortex water separation mechanism 1-1 is distributed on the extension plate 1-3, the bending plate 1-4 and the inner wall of the gas-water separator body 5; the setting of the extension plate 1-3 of the present invention can increase the running path of hydrogen in the gas-water separator body 5, that is, The hydrogen entering through the hydrogen inlet 11 in the early stage directly hits the extension plate 1-3, and the extension plate 1-3 acts as a baffle, which can play a role in initial gas-water separation. Because one end of the extension plate 1-3 is connected to the inner wall of the gas-water separator body 5, during subsequent use, the hydrogen can run along the extension plate 1-3, and then enter the inside of the bending plate 1-4 through the upper connecting hole 1-41, and then enter the vortex water separation mechanism 1-1. At the same time, in order to facilitate the subsequent flow of gas, a through-hole structure can be set on the bending plate 1-4, and the normal flow of gas can also be achieved through the through hole 32 on the partition plate 31; because based on such a setting, during subsequent use, the hydrogen discharged from the vortex water separation mechanism 1-1 can enter the baffle water separation mechanism 1-2 through the above-mentioned holes to achieve the separation of gas and water again.

[0124] Furthermore, in the present invention, a partition plate 31 is provided on the gas-water separator cover plate 3, and the partition plate 31 is arranged opposite to the bending plates 1-4, and the partition plate 31 and the bending plates separate the inner cavity of the gas-water separator body 5; the partition plate 31, as the name implies, plays a partitioning role. In actual use, the bending plates 1-4 are arranged opposite to the partition plate 31, so that a docking plate structure is formed between the gas-water separator cover plate 3 and the gas-water separator body 5, so that a vortex water separation area and a baffle water separation area can be divided in the gas-water separator 103, thereby optimizing the gas-water separation efficiency of the present invention.

[0125] At the same time, a through hole 32 is provided on the partition plate 31 in the present invention; the through hole 32 is a connecting hole, which is convenient for the hydrogen discharged from the vortex water separation mechanism 1-1 to enter the baffle water separation mechanism 1-2 through the through hole 32. In this way, because the through hole 32 is arranged on the partition plate 31, the through hole 32 and the upper connecting hole 1-41 are staggered, which can increase the movement path of hydrogen in the outer plate cover to a certain extent, thereby better ensuring the separation efficiency of gas and water.

[0126] A fuel cell assembly includes a manifold mechanism, wherein the manifold mechanism is connected to the gas-water separator 103 .

[0127] specific:

[0128] The present invention discloses a gas-water separator 103 for a fuel cell, comprising a gas-water separator body 5; a gas-water separator cover plate 3 is arranged on the gas-water separator body 5; a hydrogen inlet 11, a hydrogen outlet 12 and a water drain 9 are arranged on the gas-water separator body 5; the hydrogen inlet 11, the hydrogen outlet 12 and the water drain 9 are distributed in an interval and staggered manner on the gas-water separator body 5; a water separation structure is arranged inside the gas-water separator body 5; the water separation structure comprises a vortex water separation mechanism 1-1 and a baffle water separation mechanism 1-2; the hydrogen inlet 11 of the hydrogen discharged from the fuel cell stack enters the gas-water separator body 5, and then the gas-water separation is carried out through the vortex water separation mechanism 1-1 and the baffle water separation mechanism 1-2; the present invention separates water vapor, nitrogen and hydrogen from the unreacted hydrogen of the hydrogen fuel cell through the vortex + baffle structure to complete the recovery and utilization of hydrogen.

[0129] One end of the gas-water separator 103 is connected to the hydrogen outlet 12 of the fuel cell stack, and the other end is connected to the hydrogen pump or the ejector; the tail gas discharged from the hydrogen outlet 12 of the fuel cell stack is separated from the water through the vortex + baffle structure of the gas-water separator 103, the humidity of the hydrogen is reduced and its concentration is increased, and the separated hydrogen is sucked into the hydrogen pump or the ejector through negative pressure, mixed with fresh hydrogen and then fed into the stack, so as to achieve the recovery and reuse of hydrogen and the humidification of fresh hydrogen.

[0130] Application of gas-water separator 103: Figure 1 , Figure 2 As shown, the gas-water separator body 5 and the gas-water separator cover plate 3 are assembled together by bolts 6 and an internal sealing ring 10, and the drain valve 13, the nitrogen exhaust valve 10714, the hydrogen pressure sensor 4 and the hydrogen temperature sensor are installed.

[0131] Then, the gas-water separator 103 is fixed to the front end plate 101 of the hydrogen fuel cell stack by means of fixing bolts 7, the hydrogen inlet 11 is connected to the hydrogen outlet of the stack, and the hydrogen outlet 12 is connected to the hydrogen inlet of the hydrogen circulation pump.

[0132] Since hydrogen is in excess in hydrogen fuel cells, the exhaust consists of not only the reaction product water, but also excess hydrogen and nitrogen from the proton exchange membrane, which together constitute the hydrogen exhaust.

[0133] The exhaust gas from the hydrogen gas path of the fuel cell stack enters the flow channel of the gas-water separator body 5, and enters the vortex water separation area after being guided by the initial baffle.

[0134] Vortex watershed A Figure 3 As shown, it is formed by 5 vortex water dividing baffles, each vortex water dividing baffle is inclined at 72° to each other, and each baffle has an inclination angle as shown in FIG. Figure 5 , 6 shown.

[0135] When the gas passes through the vortex water separation area A, Figure 5 As shown, it will collide with five vortex water-dividing baffles respectively to form an air flow vortex, and part of the water vapor will separate 70-80% of the water vapor when colliding with the baffle, and flow out from the vortex water guide groove at the corner. After the remaining gas forms a vortex airflow, the space in the upper area increases and the pressure decreases due to the oblique angle of the baffle, which will press the gas into the notch flow channel of the gas-water separator cover plate 3, thereby entering the baffle water-dividing area B.

[0136] Baffle watershed B, such as Figure 3 As shown, it mainly includes a bottom water retaining plate 1-21 and a side water retaining plate.

[0137] The first side plate 1-22, the second side plate 1-23 and the bottom water retaining plate 1-21 form a water retaining area; the water retaining area is the condensed water collection area.

[0138] The hydrogen flowing from the vortex water separation area A enters the baffle water separation area. Due to the increase in space, the air flow rate slows down and hits the wall at the same time, separating nearly 20% to 29.9% of the water vapor in the remaining gas, and then enters the condensed water collection area at the bottom, and is discharged through the drain port 9 of the drain valve 13 after being collected with the condensed water of the hydrogen circulation pump. The remaining hydrogen is discharged from the hydrogen outlet 12. The streamlines of the hydrogen and condensed water are as shown in the figure. Figure 4 shown.

[0139] Excess nitrogen is discharged; when hydrogen undergoes proton exchange in the fuel cell stack, nitrogen will simultaneously pass through the proton exchange membrane to the anode and enter the hydrogen, which will reduce the concentration of discharged hydrogen. Therefore, after hydrogen is separated from water, the nitrogen outlet 1 is set to a position lower than the hydrogen outlet 12 according to the mass fraction of nitrogen being greater than hydrogen. The position of the nitrogen discharge valve 10714 is as follows: Figure 1 shown.

[0140] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A combined manifold for a fuel cell, characterized in that: It includes a manifold body and a gas-water separator; The manifold body is provided with an air cavity, a cooling water cavity and a hydrogen cavity; the air cavity, the cooling water cavity and the hydrogen cavity are distributed in sequence on the manifold body; The hydrogen chamber is connected to a gas-water separator; the gas-water separator comprises a gas-water separator body and a gas-water separator cover plate; a water separation structure is provided inside the gas-water separator body; The gas-water separator body and the manifold body are of integrated design.

2. A combined manifold for a fuel cell according to claim 1, characterized in that: The air cavity is connected with an air inlet stop valve sealing ring and an air inlet joint; the air cavity is connected with the air inlet stop valve and the air inlet joint in sequence through the air inlet stop valve sealing ring.

3. A combined manifold for a fuel cell according to claim 2, characterized in that: An air path temperature sensor and a pressure sensor are installed on the air inlet joint.

4. A combined manifold for a fuel cell according to claim 1, characterized in that; The manifold body comprises a manifold plate body, on which an air block and a water channel block are arranged; the air cavity is arranged through the manifold plate body and the air block; The cooling water chamber extends from the manifold plate body to the water channel block; The cross-sections of the air cavity and the cooling water cavity close to one end of the manifold plate body are irregularly shaped; The cross-sections of the air cavity and the cooling water cavity away from one end of the manifold plate body are circular; the air cavity and the cooling water cavity both smoothly transition from irregular cross-sections to circular cross-sections.

5. A combined manifold for a fuel cell according to claim 4, characterized in that: The water channel block is connected with a water channel inlet joint; the water channel inlet joint is located on the side of the water channel block.

6. A combined manifold for a fuel cell according to claim 1, characterized in that: The hydrogen cavity is arranged below the cooling water cavity, and the hydrogen cavity is arranged obliquely, and the hydrogen cavity obliquely extends downward to the hydrogen inlet of the gas-water separator body; The gas-water separator body is provided with a hydrogen inlet, a hydrogen outlet and a water drain; the hydrogen inlet, the hydrogen outlet and the water drain are distributed in an interval and staggered manner on the gas-water separator body.

7. A combined manifold for a fuel cell according to claim 6, characterized in that: A hydrogen temperature sensor installation port is arranged between the hydrogen cavity and the hydrogen inlet.

8. A combined manifold for a fuel cell according to claim 1, characterized in that: The gas-water separator cover plate is provided with a nitrogen exhaust valve installation port, and the cross section of the nitrogen exhaust valve installation port is funnel-shaped; the water separation structure includes a vortex water separation mechanism and / or a baffle water separation mechanism arranged in the gas-water separator body.

9. A combined manifold for a fuel cell according to claim 1, characterized in that: The combined manifold is formed by injection molding.

10. A fuel cell assembly, characterized in that: It comprises an air side end plate, on which is provided a combined manifold for a fuel cell as claimed in any one of claims 1 to 9.

Images