CN113983264A - Manifold device and double-stack fuel cell using same - Google Patents
Manifold device and double-stack fuel cell using same Download PDFInfo
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- CN113983264A CN113983264A CN202111636994.2A CN202111636994A CN113983264A CN 113983264 A CN113983264 A CN 113983264A CN 202111636994 A CN202111636994 A CN 202111636994A CN 113983264 A CN113983264 A CN 113983264A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/025—Branch units, e.g. made in one piece, welded, riveted with rectangular cross-section
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
- H01M8/2485—Arrangements for sealing external manifolds; Arrangements for mounting external manifolds around a stack
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fuel Cell (AREA)
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Abstract
The invention relates to the technical field of fuel cells, in particular to a manifold device and a double-stack fuel cell using the same, wherein the manifold device comprises a first manifold, a second manifold and a third manifold, and the first manifold, the second manifold and the third manifold are respectively of independent detachable structures; the first manifold, the second manifold and the third manifold are respectively used for conveying or discharging different media. In addition, the double-stack fuel cell comprises two manifold devices, wherein one manifold device is used for respectively inputting media to the two electric stacks and is used as an input medium manifold device, and the other manifold device is used for outputting the media flowing through the two electric stacks and is used as an output medium manifold device; the medium branch ports of the input medium manifold device are respectively communicated with any medium connecting hole of the input medium connecting hole groups on the two cell stacks in a one-to-one sealing mode, and the medium branch ports of the output medium manifold device are respectively communicated with any medium connecting hole of the output medium connecting hole groups on the two cell stacks in a one-to-one sealing mode. The invention carries out optimization design on the manifold and improves the operational reliability of the product.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a manifold device and a double-stack fuel cell using the same.
Background
The fuel cell is a device for directly converting chemical energy stored in fuel and oxidant into electric energy, has great advantages compared with traditional energy sources such as coal, petroleum, natural gas and the like, is an effective means for solving environmental pollution and energy crisis, the fuel of the fuel cell is generally hydrogen, methanol, methane and the like, and air or oxygen and the like are used as the oxidant.
In the field of fuel cell technology, as more fuel cells occupy more space, and in order to make better use of space, a large fuel cell stack needs to be divided into several small fuel cells, and the fuel cells are usually combined in series or in parallel. The design of the manifolds is critical for series or parallel stacks.
In the prior art, the design of a plurality of manifolds is biased to integration, but the whole manifold needs to be replaced when any manifold has a problem, so that the cost is high. In addition, the existing manifold device does not consider the better sealing effect of connection with the galvanic pile, so that the gas leakage and water leakage conditions are caused.
Disclosure of Invention
The invention aims to provide a manifold device and a double-stack fuel cell using the same, which are used for optimally designing a manifold and improving the operational reliability of a product.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manifold device comprises a first manifold, a second manifold and a third manifold, wherein the first manifold, the second manifold and the third manifold are respectively of independent detachable structures;
the first manifold, the second manifold and the third manifold are respectively used for conveying or discharging different media.
Preferably, the first manifold comprises a first manifold main pipe, a first manifold shunt pipe and two first manifold slave pipes, one end of the first manifold main pipe is a first main flow port, the first main flow port is externally connected with an air pipe and used for conveying air or discharging air, the other end of the first manifold main pipe is connected with the first manifold shunt pipe, two ends of one side surface of the first manifold shunt pipe are respectively connected with one end of the first manifold slave pipe, the other end of the first manifold slave pipe is a first shunt port, and the first shunt port is in sealing connection with an air connection hole of a stack of a dual-stack fuel cell;
the second manifold comprises a second manifold main pipe, a second manifold shunt pipe and two second manifold slave pipes, one end of the second manifold main pipe is provided with a second main flow port, and the second main flow port is externally connected with a cooling liquid pipe and used for conveying cooling liquid or discharging the cooling liquid; the other end of the second manifold main pipe is connected with the second manifold flow dividing pipe, and the second manifold main pipe is vertically arranged at the central position of the second manifold flow dividing pipe; the two ends of one side surface of the second manifold shunt pipe are respectively connected with one end of the second manifold slave pipe; the other end of the second manifold from the pipeline is a second shunt port, and the second shunt port is hermetically connected with a cooling liquid connection hole of a galvanic pile of the double-pile fuel cell;
the third manifold includes third manifold trunk line, third manifold shunt tubes and two third manifolds from the pipeline, the one end of third manifold trunk line is the third mainstream mouth, the external fuel gas pipeline of third mainstream mouth for carry gaseous or the exhaust fuel gas, the other end of third manifold trunk line is connected the third manifold shunt tubes, the third manifold shunt tubes is connected respectively at its one side both ends the third manifold follows the one end of pipeline, the third manifold follows the other end of pipeline and is the third shunt tubes, the fuel gas of third manifold and two fuel cell's galvanic pile connects hole sealing connection.
Preferably, the second manifold is further provided with a second manifold exhaust pipe for exhausting a mixed gas in the cooling liquid flowing through the second manifold.
Preferably, the two first shunt ports, the two second shunt ports and the two third shunt ports are arranged in a straight line, and the arrangement sequence is any one of the first shunt ports, any one of the second shunt ports, any one of the third shunt ports, the other one of the first shunt ports, the other one of the second shunt ports and the other one of the third shunt ports.
A kind of double pile fuel cell, including two electric piles that are arranged side by side and above-mentioned manifold device;
the two ends of the electric pile along the direction vertical to the parallel direction are provided with an input medium connecting hole group at one end and an output medium connecting hole group at the other end;
the two manifold devices are respectively provided, one manifold device is used for respectively inputting media to the two electric piles and is used as an input medium manifold device, and the other manifold device is used for outputting the media flowing through the two electric piles and is used as an output medium manifold device;
the medium branch ports of the input medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the input medium connecting hole group, and the medium branch ports of the output medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the output medium connecting hole group.
Preferably, the input medium manifold device and the output medium manifold device are symmetrically distributed about the center of the parallel direction of the two stacks.
Preferably, the input medium connection hole group is divided into an air connection hole, a cooling liquid connection hole and a fuel gas connection hole, the output medium connection hole group is divided into an air connection hole, a cooling liquid connection hole and a fuel gas connection hole, the air connection hole, the cooling liquid connection hole and the fuel gas connection hole are arranged at two ends of the cell stack in a straight line, and the connection holes of the input medium connection hole group and the output medium connection hole group are arranged in an opposite order;
two first branch ports of a first manifold of the input medium manifold device are respectively connected with air connecting holes of input medium connecting hole groups of two galvanic piles in a sealing way;
two first branch ports of a first manifold of the output medium manifold device are respectively connected with air connection holes of output medium connection hole groups of the two electric piles in a sealing manner;
two second branch ports of a second manifold of the input medium manifold device are respectively connected with the cooling liquid connection holes of the input medium connection hole groups of the two galvanic piles in a sealing way;
two second branch ports of a second manifold of the output medium manifold device are respectively connected with the cooling liquid connection holes of the output medium connection hole groups of the two galvanic piles in a sealing way;
two third branch ports of a third manifold of the input medium manifold device are respectively connected with fuel gas connection holes of input medium connection hole groups of two galvanic piles in a sealing way;
and two third branch ports of a third manifold of the output medium manifold device are respectively connected with the fuel gas connecting holes of the output medium connecting hole groups of the two electric piles in a sealing way.
Preferably, the first main flow port of the first manifold, the second main flow port of the second manifold, and the third main flow port of the third manifold are disposed above the output medium port group from front to back in a direction perpendicular to a direction in which the two stacks are arranged side by side, and the other of the third main flow port, the second main flow port, and the first main flow port is disposed above the input medium port group from front to back in a direction perpendicular to a direction in which the two stacks are arranged side by side.
Preferably, the fuel cell stack further comprises a sealing element, the sealing element is provided with sealing holes, the sealing holes are arranged corresponding to the two input medium hole groups or the two output medium hole groups of the two fuel cell stacks, the sealing holes comprise a first sealing hole, a second sealing hole and a third sealing hole, and the input medium manifold device and the output medium manifold device are in sealing connection with the medium branch port and the two fuel cell stacks through the corresponding sealing holes.
Compared with the prior art, the technical scheme has the following beneficial effects:
(1) the manifold device disclosed by the invention adopts the combination of the first manifold, the second manifold and the third manifold which are independently detachable, and only one of the medium manifolds needs to be replaced under the condition that any one medium manifold has a problem and needs to be replaced, so that the manifold device is convenient and quick. In addition, each independent medium manifold is respectively used for conveying or discharging different media, so that the isolation between gases and between the gases and the liquid can be better performed, and accidents are prevented;
(2) the double-stack fuel cell adopts the independently detachable manifold device to be combined with the two electric stacks which are arranged in parallel, comprises an input medium manifold device and an output medium manifold device which are respectively arranged at different positions of the two electric stacks for conveying or discharging various media, and is in one-to-one corresponding sealing connection with any medium connecting hole of the input medium connecting hole group and the output medium connecting hole group of the two electric stacks, so that the specific position of each medium manifold can be clearly mastered, and the isolation between gas and liquid can be better carried out, and accidents can be prevented.
Drawings
Fig. 1 is a schematic structural view of a manifold device of a dual stack fuel cell and a manifold device using the same according to the present invention;
FIG. 2 is a schematic view of a first manifold structure of the manifold device and a dual stack fuel cell employing the same of the present invention;
fig. 3 is a schematic structural view of a second manifold of the manifold device and a dual stack fuel cell employing the same of the present invention;
fig. 4 is a schematic structural view of a third manifold of the manifold device and a dual stack fuel cell employing the same of the present invention;
fig. 5 is a schematic structural view of a manifold device and a stack of a dual stack fuel cell to which the manifold device is applied according to the present invention;
fig. 6 is a schematic view showing the structure of a seal member of a manifold device and a dual stack fuel cell to which the manifold device is applied according to the present invention;
FIG. 7 is a schematic view of the assembly of the first manifold, seals and stack of a dual stack fuel cell employing the manifold assembly of the present invention;
FIG. 8 is a schematic view of the assembly of the second manifold, seals and stack of the manifold device and a dual stack fuel cell employing the same of the present invention;
FIG. 9 is a schematic view of the assembly of the third manifold, seals and stack of the manifold assembly and dual stack fuel cell employing the same of the present invention;
FIG. 10 is a schematic structural view of one embodiment of the manifold assembly and a dual stack fuel cell employing the same of the present invention;
in the drawings: the fuel cell stack comprises a first manifold 1, a second manifold 2, a third manifold 3, a stack 4, a sealing member 5, a first manifold main pipe 11, a first manifold shunt pipe 12, a first manifold slave pipe 13, a second manifold main pipe 21, a second manifold shunt pipe 22, a second manifold slave pipe 23, a second manifold exhaust pipe 24, a third manifold main pipe 31, a third manifold shunt pipe 32, a third manifold slave pipe 33, an input medium port group 41, an output medium port group 42, a sealing hole 50, an air port 401, a cooling liquid port 402, a fuel gas port 403, an input medium manifold device 100, an output medium manifold device 200, a first main flow port 101, a first branch flow port 102, a second main flow port 201, a second branch flow port 202, a third main flow port 301, a third branch flow port 302, a first sealing hole 501, a second sealing hole 502 and a third sealing hole 503.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 4, a manifold device comprises a first manifold 1, a second manifold 2 and a third manifold 3, wherein the first manifold 1, the second manifold 2 and the third manifold 3 are respectively of an independent detachable structure;
the first manifold 1, the second manifold 2 and the third manifold 3 are respectively used for conveying or discharging different media.
In the existing manifold with integrated design, the whole body needs to be replaced when any one manifold fails, and the cost is high. The manifold device adopts the combination of the first manifold 1, the second manifold 2 and the third manifold 3 which are independently detachable, and only one of the medium manifolds needs to be replaced under the condition that any one medium manifold has a problem and needs to be replaced, thereby being convenient and quick. In addition, each independent medium manifold is respectively used for conveying or discharging different media, so that the isolation between gases and between the gases and the liquid can be better performed, and accidents are prevented.
More specifically, the first manifold 1 includes a first manifold main pipe 11, a first manifold branch pipe 12 and two first manifold slave pipes 13, one end of the first manifold main pipe 11 is a first main flow port 101, the first main flow port 101 is externally connected with an air pipe for conveying air or discharging air, the other end of the first manifold main pipe 11 is connected with the first manifold branch pipe 12, two ends of one side of the first manifold branch pipe 12 are respectively connected with one end of the first manifold slave pipe 13, the other end of the first manifold slave pipe 13 is a first branch flow port 102, and the first branch flow port 102 is in sealed connection with an air connection hole 401 of a stack 4 of a dual-stack fuel cell;
the second manifold 2 comprises a second manifold main pipe 21, a second manifold shunt pipe 22 and two second manifold slave pipes 23, one end of the second manifold main pipe 21 is provided with a second main flow port 201, and the second main flow port 201 is externally connected with a cooling liquid pipe and used for conveying cooling liquid or discharging the cooling liquid; the other end of the second main manifold pipe 21 is connected with the second manifold branch pipe 22, and the second main manifold pipe 21 is vertically arranged at the center of the second manifold branch pipe 22; the second manifold branch pipe 22 is connected with one end of the second manifold slave pipe 23 at two ends of one side surface thereof; the other end of the second manifold from the pipe 23 is provided with a second branch port 202, and the second branch port 202 is connected with a cooling liquid connection hole 402 of the electric pile 4 of the double-pile fuel cell in a sealing way;
In this embodiment, first manifold 1, second manifold 2 and third manifold 3 are respectively through the structure setting of trunk line, shunt tubes and follow the pipeline for can cooperate the linking between first manifold 1, second manifold 2 and the third manifold 3, make full use of space, and simple structure, easy processing practices thrift the cost. Further, the second manifold main pipe 21 is vertically arranged at the central position of the second manifold shunt pipe 22, which is beneficial to the uniform circulation of the medium.
Preferably, the first main manifold pipe 11 is connected to the first manifold branch pipe 12 at a right angle, and the third main manifold pipe 31 is connected to the third manifold branch pipe 32 at a right angle. In this embodiment, the first main manifold pipe 11 and the first manifold branch pipe 12, and the third main manifold pipe 31 and the third manifold branch pipe 32 are connected at a right angle, so as to improve the distribution of medium flow, so that the medium uniformly enters the two electric piles 4, and provide the same working condition for the two electric piles 4.
In a further description, the second manifold 2 is further provided with a second manifold exhaust pipe 24, and the second manifold exhaust pipe 24 is used for exhausting the mixed gas in the cooling liquid flowing through the second manifold 2. In this embodiment, the second manifold exhaust pipe 24 is provided to help exhaust the mixed gas components carried in by the coolant, to improve the cooling effect, and to avoid the risk of excessive gas and coolant chemical reaction in the bipolar plate flow field of the stack 4. Specifically, the second manifold exhaust pipe 24 is externally connected with an exhaust box, and due to the influence of gravity, the liquid in the cooling liquid flows under the mixed gas, so that the mixed gas can be exhausted outwards through the second manifold exhaust pipe 24.
Further, the two first shunt ports 102, the two second shunt ports 202, and the two third shunt ports 302 are arranged in a straight line, and the arrangement order is any one of the first shunt ports 102, any one of the second shunt ports 202, any one of the third shunt ports 302, another one of the first shunt ports 102, another one of the second shunt ports 202, and another one of the third shunt ports 302. In the present embodiment, the two first shunt ports 102, the two second shunt ports 202, and the two third shunt ports 302 are arranged in a straight line according to a specific arrangement sequence, which is beneficial to uniformly distributing each medium to each cell stack 4, and reduces the damage to the cell stacks 4 caused by uneven distribution. Meanwhile, the gas manifold integrated block is convenient for personnel to install and maintain.
As shown in fig. 5 to 10, a dual stack fuel cell comprises two stacks 4 arranged in parallel and the above-mentioned manifold device;
two ends of the electric pile 4 along the direction vertical to the parallel direction are provided with an input medium connecting hole group 41 at one end and an output medium connecting hole group 42 at the other end;
the two manifold devices are provided, one is used for respectively inputting media to the two electric piles 4 and is an input media manifold device 100, and the other is used for outputting the media flowing through the two electric piles 4 and is an output media manifold device 200;
the medium branch ports of the input medium manifold device 100 are respectively in one-to-one sealing communication with any medium connection hole of the input medium connection hole group 41, and the medium branch ports of the output medium manifold device 200 are respectively in one-to-one sealing communication with any medium connection hole of the output medium connection hole group 42.
The manifold of the existing integrated design is not sealed enough to be connected with the electric pile 4 of the fuel cell, and when the manifold is aged after being used for a long time, the joint of each manifold and the electric pile 4 is easy to leak gas, so that the danger of explosion can be generated. Moreover, due to the integrated design, the whole manifold needs to be replaced when any manifold is in a problem, and the cost is higher. The double-stack fuel cell adopts the independent detachable manifold device, is independently and hermetically connected with any medium connecting hole of the input medium connecting hole group 41 and the output medium connecting hole group 42 of the electric stack 4 in a one-to-one correspondence manner, and only needs to replace one medium manifold when any medium manifold in the input medium manifold device 100 and the output medium manifold device 200 has a problem and needs to be replaced, so that the double-stack fuel cell is convenient and quick. In addition, the independent input medium manifold device 100 and the independent output medium manifold device 200 are respectively arranged at different positions of the electric pile 4 to convey or discharge various media, so that the specific position of each medium manifold can be clearly known, and the isolation between gases and liquid can be better performed, thereby preventing accidents.
To be more specific, the input medium manifold device 100 and the output medium manifold device 200 are symmetrically distributed about the center of the parallel direction of the two stacks 4. In this embodiment, the centrosymmetric design of the input medium manifold device 100 and the output medium manifold device 200 enables the length of the input pipeline in the input medium manifold device 100 and the length of the corresponding output pipeline in the output medium manifold device 200 to be consistent, further enables various media to be uniformly distributed, and can ensure that the two parallel-arranged cell stacks 4 can normally work.
To explain further, the input medium contact hole set 41 is divided into an air contact hole 401, a coolant contact hole 402 and a fuel gas contact hole 403, the output medium contact hole set 42 is divided into an air contact hole 401, a coolant contact hole 402 and a fuel gas contact hole 403, the air contact hole 401, the coolant contact hole 402 and the fuel gas contact hole 403 are arranged at two ends of the cell stack 4 in a straight line, and the contact holes of the input medium contact hole set 41 and the output medium contact hole set 42 are arranged in the opposite order;
the two first branch ports 102 of the first manifold 1 of the input medium manifold device 100 are respectively connected with the air connection holes 401 of the input medium connection hole groups 41 of the two electric stacks 4 in a sealing way;
the two first branch ports 102 of the first manifold 1 of the output medium manifold device 200 are respectively connected with the air connection holes 401 of the output medium connection hole groups 42 of the two electric stacks 4 in a sealing way;
the two second branch ports 202 of the second manifold 2 of the input medium manifold device 100 are respectively connected with the cooling liquid connection holes 402 of the input medium connection hole groups 41 of the two stacks 4 in a sealing manner;
the two second branch ports 202 of the second manifold 2 of the output medium manifold device 200 are respectively connected with the cooling liquid connection holes 402 of the output medium connection hole groups 42 of the two stacks 4 in a sealing manner;
the two third branch ports 302 of the third manifold 3 of the input medium manifold device 100 are respectively connected with the fuel gas connection holes 403 of the input medium connection hole groups 41 of the two electric stacks 4 in a sealing way;
the two third branch ports 302 of the third manifold 3 of the output medium manifold device 200 are respectively connected with the fuel gas connection holes 403 of the output medium connection hole groups 42 of the two stacks 4 in a sealing manner.
Specifically, the working process of the first manifold 1, the second manifold 2 and the third manifold 3 is as follows: in this embodiment, the input medium manifold device 100 is hermetically connected with the input medium connection hole group 41 on the left side of the stack 4, and the output medium manifold device 200 is hermetically connected with the output medium connection hole group 42 on the right side of the stack 4;
the first manifold main pipe 11 of the input medium manifold device 100 receives external air through an external air pipe of the first main flow port 101, and respectively conveys the air to the two first manifold slave pipes 13 through the first manifold shunt pipes 12, the first manifold slave pipes 13 convey the air to the air connecting hole 401 at the left side of the stack 4, the air enters the bipolar plate flow field of the fuel cell, the air and the membrane electrode of the fuel cell perform chemical reaction, the redundant air is discharged from the air connecting hole 401 at the right side of the stack 4 to the two first manifold slave pipes 13 of the output medium manifold device 200, the two first manifold slave pipes 13 discharge the air to the first manifold shunt pipes 12, the air collected by the first manifold shunt pipes 12 is uniformly discharged to the first manifold main pipe 11, and the first manifold main pipe 11 discharges the air to the outside.
The second manifold main pipe 21 of the input medium manifold device 100 receives external cooling liquid through a cooling liquid pipe externally connected to the second main flow port 201, and respectively conveys the cooling liquid to the two second manifold slave pipes 23 through the second manifold branch pipes 22, the second manifold slave pipes 23 convey the cooling liquid to the cooling liquid connection hole 402 on the left side of the stack 4, the cooling liquid enters the bipolar plate flow field of the fuel cell for cooling the fuel cell, the cooling liquid which carries away heat through the cooling effect is discharged to the two second manifold slave pipes 23 of the output medium manifold device 200 from the cooling liquid connection hole 402 on the right side of the stack 4, the two second manifold slave pipes discharge the cooling liquid to the second manifold branch pipes 22 from the pipe 23, the cooling liquid is collected by the second manifold branch pipes 22 and then uniformly discharged to the second manifold main pipe 21, and the second manifold main pipe 21 discharges the cooling liquid to the outside.
The third manifold main pipe 31 of the input medium manifold device 100 receives the outside fuel gas through the third main flow port 301, and the fuel gas is respectively delivered to the two third manifold slave pipelines 33 through the third manifold shunt tubes 32, the third manifold slave pipelines 33 deliver the fuel gas to the fuel gas connecting holes 403, the fuel gas enters the bipolar plate flow field of the fuel cell, the fuel gas and the membrane electrode of the fuel cell perform chemical reaction, the redundant fuel gas is discharged to the two third manifold slave pipelines 33 of the output medium manifold device 200 from the fuel gas connecting holes 403 on the right side of the stack 4, the two third manifold slave pipelines 33 discharge the fuel gas to the third manifold shunt tubes 32, the fuel gas collected by the third manifold shunt tubes 32 is uniformly discharged to the third manifold master pipeline 31, and the third manifold master pipeline 31 externally discharges the fuel gas.
To be further described, the first main flow port 101 of the first manifold 1, the second main flow port 201 of the second manifold 2, and the third main flow port 301 of the third manifold 3 are disposed above the output medium port group 42 from front to back in a direction perpendicular to the parallel direction of the two stacks 4, and the other of the third main flow port 301, the second main flow port 201, and the first main flow port 101 is disposed above the input medium port group 41 from front to back in a direction perpendicular to the parallel direction of the two stacks 4. In this embodiment, the first main flow port 101, the second main flow port 201, and the third main flow port 301 are respectively disposed at different positions above the input medium receiving hole group 41 and the output medium receiving hole group 42 to deliver or discharge various media, so that the specific position of each medium manifold can be rapidly grasped, the external pipelines corresponding to each medium manifold can be conveniently and rapidly installed, and the working efficiency can be improved.
Further, the fuel cell system further includes a sealing member 5, the sealing member 5 is provided with a sealing hole 50, the sealing hole 50 is provided corresponding to two input medium port groups 41 or two output medium port groups 42 of the two fuel cell stacks 4, the sealing hole 50 includes a first sealing hole 501, a second sealing hole 502 and a third sealing hole 503, and the input medium manifold device 100 and the output medium manifold device 200 are hermetically connected to the medium branch port and the two fuel cell stacks 4 through the corresponding sealing holes 50.
In the embodiment, the sealing member 5 is connected at the joint between each media manifold and the fuel cell stack 4 in a matching manner, so that the sealing effect between each media manifold and the fuel cell stack 4 is enhanced, and the accidental occurrence of gas leakage and liquid leakage is prevented, so that the service life of the fuel cell is prolonged. Further, the sealing element 5 is designed into a single piece type, and can simultaneously seal a plurality of sealing holes 50, so that the sealing operation is simple and convenient, the installation time and labor force are saved, and the installation efficiency is improved. Specifically, the first manifold 1 is hermetically connected with the stack 4 through a first sealing hole 501 and a first shunt port 102, the second manifold 2 is hermetically connected with the stack 4 through a second sealing hole 502 and a second shunt port 202, and the third manifold 3 is hermetically connected with the stack 4 through a third sealing hole 503 and a third shunt port 302.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty based on the explanations herein, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A manifold device is characterized by comprising a first manifold, a second manifold and a third manifold, wherein the first manifold, the second manifold and the third manifold are respectively of independent detachable structures;
the first manifold, the second manifold and the third manifold are respectively used for conveying or discharging different media.
2. The manifold device according to claim 1, wherein the first manifold comprises a first manifold main pipe, a first manifold branch pipe and two first manifold slave pipes, one end of the first manifold main pipe is a first main flow port, the first main flow port is externally connected with an air pipe and used for conveying air or discharging air, the other end of the first manifold main pipe is connected with the first manifold branch pipe, two ends of one side surface of the first manifold branch pipe are respectively connected with one end of the first manifold slave pipe, the other end of the first manifold slave pipe is a first branch port, and the first branch port is hermetically connected with an air connection hole of a stack of the dual-stack fuel cell;
the second manifold comprises a second manifold main pipe, a second manifold shunt pipe and two second manifold slave pipes, one end of the second manifold main pipe is provided with a second main flow port, and the second main flow port is externally connected with a cooling liquid pipe and used for conveying cooling liquid or discharging the cooling liquid; the other end of the second manifold main pipe is connected with the second manifold flow dividing pipe, and the second manifold main pipe is vertically arranged at the central position of the second manifold flow dividing pipe; the two ends of one side surface of the second manifold shunt pipe are respectively connected with one end of the second manifold slave pipe; the other end of the second manifold from the pipeline is a second shunt port, and the second shunt port is hermetically connected with a cooling liquid connection hole of a galvanic pile of the double-pile fuel cell;
the third manifold includes third manifold trunk line, third manifold shunt tubes and two third manifolds from the pipeline, the one end of third manifold trunk line is the third mainstream mouth, the external fuel gas pipeline of third mainstream mouth for carry gaseous or the exhaust fuel gas, the other end of third manifold trunk line is connected the third manifold shunt tubes, the third manifold shunt tubes is connected respectively at its one side both ends the third manifold follows the one end of pipeline, the third manifold follows the other end of pipeline and is the third shunt tubes, the fuel gas of third manifold and two fuel cell's galvanic pile connects hole sealing connection.
3. A manifold device according to claim 2, wherein the second manifold is further provided with a second manifold exhaust pipe for exhausting the mixture of the coolant flowing through the second manifold.
4. The manifold device according to claim 2, wherein the two first branch ports, the two second branch ports, and the two third branch ports are arranged in a straight line, and the arrangement order is any one of the first branch ports, any one of the second branch ports, any one of the third branch ports, the other of the first branch ports, the other of the second branch ports, and the other of the third branch ports.
5. A dual stack fuel cell comprising two stacks arranged in parallel and the manifold device of claim 1;
the two ends of the electric pile along the direction vertical to the parallel direction are provided with an input medium connecting hole group at one end and an output medium connecting hole group at the other end;
the two manifold devices are respectively provided, one manifold device is used for respectively inputting media to the two electric piles and is used as an input medium manifold device, and the other manifold device is used for outputting the media flowing through the two electric piles and is used as an output medium manifold device;
the medium branch ports of the input medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the input medium connecting hole group, and the medium branch ports of the output medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the output medium connecting hole group.
6. A dual stack fuel cell comprising two stacks arranged in parallel and the manifold device of any one of claims 2 to 4;
the two ends of the electric pile along the direction vertical to the parallel direction are provided with an input medium connecting hole group at one end and an output medium connecting hole group at the other end;
the two manifold devices are respectively provided, one manifold device is used for respectively inputting media to the two electric piles and is used as an input medium manifold device, and the other manifold device is used for outputting the media flowing through the two electric piles and is used as an output medium manifold device;
the medium branch ports of the input medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the input medium connecting hole group, and the medium branch ports of the output medium manifold device are respectively in one-to-one sealing communication with any medium connecting hole of the output medium connecting hole group.
7. A dual stack fuel cell according to claim 6 wherein said input and output media manifold means are symmetrically disposed about the center of the direction in which the two stacks are juxtaposed.
8. The dual stack fuel cell of claim 7 wherein the input media port set is comprised of an air port, a coolant port, and a fuel gas port, and the output media port set is comprised of an air port, a coolant port, and a fuel gas port, the air port, the coolant port, and the fuel gas port being arranged in a straight row at both ends of the stack, the input media port set and the output media port set being arranged in an opposite order;
two first branch ports of a first manifold of the input medium manifold device are respectively connected with air connecting holes of input medium connecting hole groups of two galvanic piles in a sealing way;
two first branch ports of a first manifold of the output medium manifold device are respectively connected with air connection holes of output medium connection hole groups of the two electric piles in a sealing manner;
two second branch ports of a second manifold of the input medium manifold device are respectively connected with the cooling liquid connection holes of the input medium connection hole groups of the two galvanic piles in a sealing way;
two second branch ports of a second manifold of the output medium manifold device are respectively connected with the cooling liquid connection holes of the output medium connection hole groups of the two galvanic piles in a sealing way;
two third branch ports of a third manifold of the input medium manifold device are respectively connected with fuel gas connection holes of input medium connection hole groups of two galvanic piles in a sealing way;
and two third branch ports of a third manifold of the output medium manifold device are respectively connected with the fuel gas connecting holes of the output medium connecting hole groups of the two electric piles in a sealing way.
9. A dual stack fuel cell according to claim 8 wherein the first main flow port of the first manifold, the second main flow port of the second manifold and the third main flow port of the third manifold are disposed above the set of outlet medium receiving holes from front to back in a direction perpendicular to the direction in which the two stacks are juxtaposed, and the other of the third main flow port, the second main flow port and the first main flow port is disposed above the set of inlet medium receiving holes from front to back in a direction perpendicular to the direction in which the two stacks are juxtaposed.
10. The dual-stack fuel cell according to claim 6, further comprising a sealing member, wherein the sealing member has a sealing hole, the sealing hole is disposed corresponding to two input medium receiving hole sets or two output medium receiving hole sets of the two stacks, the sealing hole includes a first sealing hole, a second sealing hole and a third sealing hole, and the input medium manifold device and the output medium manifold device are hermetically connected to the medium branch port and the two stacks through the corresponding sealing holes.
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