A membrane humidifier suitable for high power fuel cells

Abstract

The present application provides a membrane humidifier suitable for a high-power fuel cell, comprising: a membrane assembly for establishing a humidity exchange environment; a shell containing the membrane assembly; wherein a dry gas inlet and a dry gas outlet are respectively provided at both ends of the shell, and the dry gas inlet and the dry gas outlet are both connected to the membrane assembly to circulate the humidified gas in the membrane assembly; wherein at least two moisture inlets and at least two moisture outlets are provided on the shell, and the moisture inlet is configured to input humidified gas into the membrane assembly in the shell; wherein at least one moisture inlet and at least one moisture outlet are respectively located on the same side or the opposite side of the shell. The membrane humidifier provided by the utility model improves the adaptability, compatibility and humidification performance of the membrane humidifier for the interface positions and interface sizes of different high-power fuel cell systems.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cells, and in particular to a membrane humidifier suitable for high-power fuel cells. Background Art

[0002] Hydrogen energy is one of the new energy sources with great development prospects. Hydrogen prepared in various ways is directly converted into electricity through fuel cells, which can be used in vehicles such as cars and trains to achieve zero terminal pollutant emissions; it can also be used in fixed power generation and heating facilities such as industrial, commercial and civil buildings. Proton Exchange Membrane Fuel Cell (PEMFC) is a new type of green power source with low operating temperature, no corrosion problems, high current density and fast response speed. It is highly favored in many application fields of military, aerospace and automotive industries, showing excellent performance and strong vitality. PEMFC has made great progress over the years and has occupied a dominant position in vehicle fuel cell engines.

[0003] In order to adapt to the application scenarios of hydrogen heavy trucks with long-term high load, the fuel cell system has been continuously upgraded, and the current fuel cell system has been upgraded to the 200KW power range. The system in this power range has higher operating temperature, larger flow rate, higher working pressure and other working conditions. However, the current membrane humidifier is difficult to integrate with various high-power fuel cell systems today, and has many defects such as low adaptability, weak compatibility and poor humidification performance. Utility Model Content

[0004] In view of the above problems, the utility model provides a membrane humidifier suitable for high-power fuel cells to improve the adaptability, compatibility and humidification performance of the membrane humidifier to interface positions and interface sizes of different high-power fuel cell systems.

[0005] The technical solution of the utility model is:

[0006] A membrane humidifier suitable for a high-power fuel cell, comprising:

[0007] Membrane components, used to establish a humidity exchange environment;

[0008] A housing containing the membrane assembly;

[0009] Wherein, a dry gas inlet and a dry gas outlet are respectively provided at both ends of the shell, and the dry gas inlet and the dry gas outlet are both connected to the membrane assembly so as to circulate the humidified gas in the membrane assembly;

[0010] Wherein, the shell is provided with at least two moisture inlets and at least two moisture outlets, and the moisture inlets are configured to input humidified gas into the membrane assembly in the shell; wherein,

[0011] The at least one moisture inlet and the at least one moisture outlet are respectively located on the same side or different sides of the housing.

[0012] As one of the preferred solutions, the membrane humidifier also includes:

[0013] At least one wet side end cover, each of the wet side end cover is mounted on the shell and is correspondingly connected to the wet gas inlet and / or the wet gas outlet;

[0014] Wherein, the diameters of the plurality of wet side end covers are the same or different.

[0015] As one of the preferred solutions, the membrane humidifier also includes:

[0016] Two dry-side end covers, which are arranged at corresponding ends of the shell and are respectively provided with the dry gas inlet and the dry gas outlet;

[0017] Wherein, the dry gas inlet and the dry gas outlet are arranged in the same direction or in different directions.

[0018] As one of the preferred solutions, each of the wet-side end covers is in a venturi shape; and / or each of the dry-side end covers is in a trapezoidal shape or a wedge shape.

[0019] As one of the preferred solutions, each of the moisture inlet and the moisture outlet is located on a corresponding narrow side of the shell, and in the width direction, has the same width as the narrow side; wherein,

[0020] Along the length direction of the narrow side surface, the plurality of moisture inlets and the plurality of moisture outlets are respectively located in the middle or at the edge of the narrow side surface.

[0021] As one of the preferred solutions, the dry gas inlet is arranged close to the wet gas outlet, and the dry gas outlet is arranged close to the wet gas inlet.

[0022] As one of the preferred solutions, the membrane assembly includes a membrane bundle frame and a plurality of hollow fiber membrane tubes that are interconnected; wherein the side surface of the membrane bundle frame is in an arch bridge shape.

[0023] As one of the preferred solutions, the interior of the shell is hollow to form a plurality of inner cavities, and the membrane bundle frame is placed in each of the inner cavities; wherein the outer surface of the membrane bundle frame is provided with a buckle matching the corresponding inner cavity.

[0024] As one of the preferred solutions, the membrane humidifier also includes:

[0025] The sealing assembly comprises at least a sealant, a potting compound and at least one sealing ring, wherein the sealant is configured to seal the gap between the shell and the dry side end cover; the potting compound is configured to seal the gap between the shell and the membrane assembly; and the plurality of sealing rings are configured to seal the gap at the connection between the shell and the dry side end cover and / or the wet side end cover.

[0026] As one of the preferred solutions, two moisture inlets and two moisture outlets are each provided, and the two moisture inlets are symmetrical with respect to the shell, and the two moisture outlets are symmetrical with respect to the shell.

[0027] Compared with the prior art, this application has the following advantages:

[0028] The present utility model embodiment proposes a membrane humidifier suitable for a high-power fuel cell, comprising: a membrane assembly for establishing a humidity exchange environment; a shell accommodating the membrane assembly; wherein a dry gas inlet and a dry gas outlet are respectively provided at both ends of the shell, and the dry gas inlet and the dry gas outlet are both connected to the membrane assembly to circulate the humidified gas in the membrane assembly; wherein at least two moisture inlets and at least two moisture outlets are provided on the shell, and the moisture inlet is configured to input humidified gas into the membrane assembly in the shell; wherein at least one moisture inlet and at least one moisture outlet are respectively located on the same side or different sides of the shell, and by adopting the technical solution of the present application:

[0029] Through the membrane humidifier provided by the embodiment of the utility model, the humidified gas is input into the dry side of the membrane assembly through the dry gas inlet, and the humidified gas enters the wet side of the humidifier through the wet gas inlet, and a humidity exchange environment is established through the membrane assembly, which can transfer moisture outside the membrane assembly to the inside of the membrane assembly, so that the humidity of the humidified gas from the dry gas outlet is improved, thereby achieving humidification of the humidified gas; since there are multiple wet gas inlets and wet gas outlets, the adaptability and compatibility of the humidifier to the interface positions of different systems are improved by adding new wet gas inlets and outlets, and the humidification performance is also enhanced, so it can be better compatible with different high-power fuel cell systems, so that the whole vehicle system can better cope with the needs of various application conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1is an exploded view of a membrane humidifier suitable for a high-power fuel cell according to an embodiment of the present application;

[0032] Figure 2 is an overall structural diagram of a membrane humidifier suitable for a high-power fuel cell according to another embodiment of the present application;

[0033] Figure 3 It is a structural cross-sectional view of a membrane humidifier suitable for a high-power fuel cell described in yet another embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Membrane assembly; 2. Shell; 3. Dry side end cover; 4. Wet side end cover; 5. Dry side end cover sealing ring; 6. Wet side end cover sealing ring; 7. First wet gas inlet; 8. Second wet gas inlet; 9. Third wet gas outlet; 10. Fourth wet gas outlet; 11. Dry gas inlet; 12. Dry gas outlet. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that fuel cells are power devices that directly convert chemical energy in fuel into electrical energy. Their conversion efficiency is not limited by the Carnot cycle, so the efficiency of fuel cells in converting electrical energy can reach 40%-60%. If combined heat and power is considered, the efficiency can be as high as 80% or more, which is obviously higher than the energy conversion efficiency of internal combustion engines. Therefore, fuel cells are the most promising energy conversion system. Therefore, fuel cells have broad application prospects in the automotive industry, aerospace, navigation, mobile power supplies, decentralized power stations and centralized power stations.

[0038] At present, most hydrogen fuel cells are proton exchange membrane fuel cells, which are composed of a battery stack and system accessories. The fuel cell system is usually equipped with an additional membrane humidifier to keep the proton exchange membrane moist. Usually, the membrane humidifier is set before the battery stack, and the incoming air is first humidified by the membrane humidifier before entering the battery stack for energy supply. The membrane humidifier usually uses the exhaust gas with a certain temperature generated by the battery cathode to humidify the incoming humidified gas (dry gas).

[0039] With the continuous development of fuel cell technology, the space reserved for the system in the whole vehicle is more diversified, which makes the interface reserved for the humidifier in the system more diversified. According to the problems mentioned in the background technology, the existing membrane humidifier is only equipped with a set of dry gas inlet and outlet and wet gas inlet and outlet, with a fixed structure and a single function. Different fuel cell systems usually have different space limitations, humidification requirements, interface positions and interface sizes. Therefore, the traditional membrane humidifier is not suitable for the current rapidly updated fuel cell system, making the whole vehicle system unable to meet the use requirements of various application conditions.

[0040] Reference Figure 1-Figure 3 As shown, Figure 1 An exploded diagram of a membrane humidifier suitable for a high-power fuel cell shown in the utility model; Figure 2 This is the overall structural diagram of the membrane humidifier suitable for high-power fuel cells shown in the utility model; Figure 3 The structure of the membrane humidifier suitable for high-power fuel cells is shown in FIG. Figure 1-Figure 3 As shown, the utility model provides a membrane humidifier suitable for a high-power fuel cell, comprising: a membrane assembly 1 for establishing a humidity exchange environment; a shell 2, accommodating the membrane assembly 1; wherein a dry gas inlet 11 and a dry gas outlet 12 are respectively provided at both ends of the shell 2, and the dry gas inlet 11 and the dry gas outlet 12 are both connected to the membrane assembly 1 to circulate the humidified gas in the membrane assembly 1; wherein at least two moisture inlets and at least two moisture outlets are provided on the shell 2, and the moisture inlet is configured to input humidified gas into the membrane assembly 1 in the shell 2; wherein at least one of the moisture inlets and at least one of the moisture outlets are respectively located on the same side or the opposite side of the shell 2.

[0041] Specifically, the membrane assembly 1 is the humidification body of the humidifier, forming a humidity exchange environment. It is usually composed of a plurality of hollow fiber membrane tubes, which are responsible for separating and transferring water molecules to maintain the appropriate humidity of the reaction gas / humidified gas in the tube. The shell 2 is the external structure of the humidifier, which carries and fixes other components, and provides a connection between the dry gas inlet 11 and the dry gas outlet 12. The two ends of the shell 2 are open, respectively connected to the dry gas inlet 11 and the dry gas outlet 12, which are used to introduce the gas to be humidified and to export the humidified gas after the humidity is increased. The shell 2 is provided with a moisture inlet and a moisture outlet. The moisture inlet is used to input humidified gas into the membrane assembly 1, and the moisture outlet is used to discharge the humidified gas after humidity exchange.

[0042] As a further explanation of this embodiment, the membrane assembly 1 includes a membrane bundle frame and a plurality of hollow fiber membrane tubes connected to each other; wherein the side of the membrane bundle frame is in the shape of an arch bridge. Furthermore, the interior of the shell 2 is hollow to form a plurality of inner through cavities, and the membrane bundle frame is placed in each of the inner through cavities; wherein the outer surface of the membrane bundle frame is provided with a buckle matching the corresponding inner through cavity. The membrane bundle frame is a frame structure for supporting and constraining the hollow fiber membrane tube. The potting glue is arranged on both sides of the shell 2 to fix and constrain the membrane bundle frame and the hollow fiber membrane tube to ensure the stability and sealing of the membrane assembly 1 and allow the gas to flow inside the hollow fiber membrane tube.

[0043] like Figure 2 As shown, multiple hollow fiber membrane tubes are fixed to the top and bottom of the main shell 2 by potting glue, and each hollow fiber membrane tube maintains a through-hole state. A plurality of inner through cavities are arranged inside the shell 2 for placing the membrane assembly 1. The outer surface of the membrane bundle frame is provided with buckles matching the corresponding inner through cavities, which are fixed in the inner through cavities, and the structure of the membrane bundle frame is the same as that of the corresponding inner through cavities.

[0044] In some optional embodiments, the membrane bundle frame is fixed in a plurality of inner through cavities and is limited in position by prisms, clamps and the inner through cavities.

[0045] In some embodiments, the humidified gas may be compressed air output by an air compressor, the dry gas inlet 11 may be connected to the outlet of the air compressor, and the dry gas outlet 12 may be connected to the inlet of the stack. In some embodiments, the humidified gas may be water vapor produced by the electrode reaction of the fuel cell system and discharged along with the tail gas, the wet gas inlet may be connected to the tail exhaust of the stack, and the wet gas outlet may be connected to the outside. The tail gas is high temperature and high humidity, and the humidity and temperature exchange with the compressed air on both sides of the hollow fiber membrane tube is achieved, so that the humidified gas is humidified when it circulates in the membrane assembly 1 before the reaction gas enters the stack.

[0046] As a specific explanation of this embodiment, the air compressor inputs the humidified gas into the dry side of the membrane assembly 1, that is, the inside of the hollow fiber membrane tube, and the water vapor generated by the tail exhaust of the fuel cell stack enters the wet side of the humidifier, that is, the outside of the hollow fiber membrane tube. Due to the characteristics of the hollow fiber membrane tube, it can transfer the moisture outside the membrane tube to the inside of the membrane tube, so that the humidity of the compressed air flowing into the stack through the dry gas outlet 12 is increased, meeting the requirements of the air humidity at the inlet of the stack.

[0047] A significant improvement of the embodiment of the utility model is that at least two moisture inlets and at least two moisture outlets are provided. By increasing the number of moisture inlets and moisture outlets, more inlets and outlets can increase the contact area between the humidified gas and the membrane assembly 1, improve the humidification efficiency of the membrane humidifier, and effectively achieve humidification and moisture discharge. In addition, since different fuel cell systems have different space limitations and interface positions, by providing multiple moisture inlets and moisture outlets, the humidifier can more easily adapt to the interface positions of different systems, so that the membrane humidifier can better adapt to different system designs, improve compatibility and adaptability, and utilize the internal space of the fuel cell system.

[0048] Compared with the traditional fuel cell humidifier, the moisture inlet and outlet in the traditional fuel cell humidifier are in the middle of the same side of the narrow side of the shell 2, resulting in reduced matching with the fuel cell system interface and poor compatibility. Further, at least one of the moisture inlet and at least one of the moisture outlet are respectively located on the same side or different sides of the shell 2, which can be understood as the positions of multiple moisture inlets and multiple moisture outlets on the shell 2 can be interchanged, and flexibly adjusted to adapt to the spatial layout and interface requirements of different fuel cell systems, so as to better adapt to different installation scenarios and requirements, and improve its flexibility and applicability.

[0049] Exemplarily, the following provides some embodiments of the arrangement of the moisture inlet and the moisture outlet:

[0050] In one approach, multiple moisture inlets and multiple moisture outlets may be located on the same side of the housing 2;

[0051] In one approach, multiple moisture inlets may be located on the same side of the housing 2, and multiple moisture outlets may be located on the opposite side of the housing 2;

[0052] In one embodiment, some of the moisture inlets and the plurality of moisture outlets may be located on the same side of the housing 2, and the remaining moisture inlets may be located on the opposite side of the housing 2;

[0053] In one embodiment, a plurality of moisture inlets and some moisture outlets may be located on the same side of the housing 2, and the remaining moisture outlets may be located on the opposite side of the housing 2;

[0054] In one embodiment, part of the moisture inlet and part of the moisture outlet may be located on the same side of the housing 2, and the remaining moisture inlet and the remaining moisture outlet may be located on the opposite side of the housing 2;

[0055] It is understandable that the side of the housing 2 mentioned above can be any side of the housing 2 except the dry gas inlet 11 and the dry gas outlet 12. It is worth mentioning that the corresponding inlet and outlet on the same side can be interchanged with the corresponding inlet and outlet on the other side, but still remain on their respective corresponding sides.

[0056] Preferably, two moisture inlets and two moisture outlets are provided, and the two moisture inlets are symmetrical with respect to the housing 2, and the two moisture outlets are symmetrical with respect to the housing 2. Figure 2 As shown, the housing 2 is a rectangular cavity having two narrow sides formed by the width and height and two end faces formed by the length and width, and the two end faces are respectively provided with a dry gas inlet 11 and a dry gas outlet 12. Figure 1 In terms of placement direction, moisture inlets are arranged on the left side of the two narrow sides of the housing 2, and the two moisture inlets are symmetrical with respect to the main housing 2; moisture outlets are arranged on the right side of the two narrow sides of the housing 2, and the two moisture outlets are symmetrical with respect to the main housing 2. The two moisture inlets are arranged symmetrically with respect to the housing 2 to ensure uniform flow of humidified gas.

[0057] In combination with the above embodiments, in some embodiments, a moisture inlet is set on the left side of the two narrow sides, and a moisture outlet is set on the right side. The moisture inlet and the moisture outlet can be swapped up and down, left and right, or symmetrically to form a membrane humidifier with a new arrangement.

[0058] In combination with the above embodiments, in some embodiments, the narrow side of the housing 2 is provided with a plurality of interfaces, and the positions of the moisture inlet and the moisture outlet can be freely adjusted to the same side or the opposite side, and freely adjusted to be axisymmetric or centrally symmetrical. For example, when two moisture inlets and two moisture outlets are respectively arranged on the same side, the moisture inlet or moisture outlet is axisymmetric; when two moisture inlets and two moisture outlets are respectively arranged on opposite sides, the moisture inlet or moisture outlet is centrally symmetrical.

[0059] It is worth mentioning that, under normal circumstances, according to the performance requirements of the fuel cell, two moisture inlets and two moisture outlets just meet the humidification requirements of the fuel cell system, that is, the humidification and moisture discharge of the fuel cell system can be effectively achieved through two moisture inlets and two moisture outlets. The number of four moisture inlets and outlets means that the complexity of the structure, installation and maintenance is relatively low, which can simplify the pipeline layout and connection, reduce the complexity of the system as well as the manufacturing cost and maintenance cost. The setting of four moisture inlets and outlets does not make water management more complicated, and maintains the humidity balance of the proton exchange membrane and the stability of the system. The space in the fuel cell system is limited. By setting only two moisture inlets and two moisture outlets, the limited space of the system can be better utilized, and the compactness and efficiency of the system can be ensured.

[0060] In this way, the embodiment of the utility model comprehensively considers the actual engineering situation, performance requirements and cost factors, determines the optimal layout conditions, simplifies the design, reduces costs, reduces complexity while meeting system requirements, and ensures the stability and reliability of the system.

[0061] Another purpose of the present application is to solve the problem that the membrane humidifier is difficult to adapt to the interface size of different systems. The present application proposes a technical solution: the membrane humidifier also includes: at least one wet side end cover 4, each of the wet side end covers 4 is installed on the housing 2 and is correspondingly connected to the wet gas inlet and / or wet gas outlet; wherein the calibers of the multiple wet side end covers 4 are the same or different.

[0062] Specifically, the membrane humidifier comprises at least one wet side end cover 4, which is convenient for communicating with the wet gas inlet and / or the wet gas outlet. The wet gas inlet and the wet gas outlet can be connected to the wet side end cover 4 via a butt flange.

[0063] In some embodiments, each wet gas inlet may be correspondingly configured with each wet side end cover 4; in some embodiments, some wet gas inlets are correspondingly configured with wet side end covers 4; in some embodiments, each wet gas outlet may be correspondingly configured with each wet side end cover 4; in some embodiments, some wet gas outlets are correspondingly configured with wet side end covers 4.

[0064] In some embodiments, please refer again to Figure 1 and Figure 2 In the arrangement form of two wet gas inlets and two wet gas outlets, a total of two wet-side end covers 4 may be configured for each wet gas inlet and each wet gas outlet.

[0065] In combination with the above embodiments, the wet side end cover 4 is arranged on the narrow side of the shell 2, connected to the shell 2 by bolts, and the wet side end cover 4 is provided with an opening connected to the wet gas inlet or the wet gas outlet.

[0066] Specifically, take the installation of the wet side end cover 4 at the wet gas inlet as an example, and the wet gas outlet can be referred to. The wet gas inlet is connected to the wet side end cover 4 by bolts, the wet side end cover 4 side is a through hole, the shell 2 side is a blind hole, and a sealing groove is provided on the docking flange surface. The wet side end cover sealing ring 6 is provided in the sealing groove to seal the docking flange surface. Different fuel cell systems have different requirements for the caliber of the wet gas inlet and outlet. The caliber of the pipe mouth of the wet side end cover 4 can be adjusted in a direction to adapt to different system interfaces. In this way, by adding the wet side end cover 4, the adaptability, compatibility and humidification performance of the fuel cell humidifier for different system interface sizes are improved.

[0067] In a preferred embodiment, the wet side end cover 4 is in the shape of a venturi tube, so as to reduce the impact of the airflow on the membrane module 1 .

[0068] In a further technical solution, the membrane humidifier further includes: two dry side end covers 3, which are arranged at the corresponding two ends of the shell 2 and are respectively opened to form the dry gas inlet 11 and the dry gas outlet 12; wherein the dry gas inlet 11 and the dry gas outlet 12 are arranged in the same direction or in opposite directions.

[0069] In this embodiment, the two end faces of the shell 2 are open, and the two dry side end covers 3 are installed on the two openings to form a dry gas inlet 11 and the dry gas outlet 12. In combination with the above embodiments, the two left and right narrow sides of the shell 2 are provided with a wet gas inlet and a wet gas outlet to facilitate the circulation of the humidified gas. Figure 2 and Figure 3 As shown, the dry side end covers 3 are respectively arranged on the two end surfaces of the top and bottom of the shell 2, one of the dry side end covers 3 serves as a dry gas inlet, and the other dry side end cover 3 serves as a dry gas outlet 12 to facilitate the circulation of the humidified gas.

[0070] Optionally, the dry side end cover 3 is trapezoidal or wedge-shaped, and is connected to the top and bottom of the shell 2 by bolts. The dry side end cover 3 can be rotated 180°, that is, the dry gas inlet 11 and the dry gas outlet 12 can be set to the same direction or different directions, ensuring that the dry side end cover 3 is aligned with the interface position of the system to adapt to the requirements of the pipeline connection and the layout of the system. For example, after the dry side end cover 3 is rotated 180°, the dry gas inlet 11 and the dry gas outlet 12 can face the same direction or opposite directions. Similarly, the wet side end cover 4 can also be installed after being rotated 180°.

[0071] In another preferred embodiment extended from the present embodiment, each of the moisture inlet and the moisture outlet is located on the corresponding narrow side of the shell 2, and in the width direction, is the same as the width of the narrow side; wherein, along the length direction of the narrow side, a plurality of the moisture inlets and the moisture outlets are respectively located in the middle or at the edge of the narrow side.

[0072] In this embodiment, the four moisture inlets and outlets are arranged with the same width as the narrow side of the housing 2, ensuring that the humidifier can maintain a compact design in different positions and directions, so that the internal space of the system can be effectively utilized, and it is also convenient for installation and layout. Among them, the moisture inlet and moisture outlet can be located in the middle position of the narrow side or at the edge position. Through various forms of adjustment, the membrane humidifier can adapt to a variety of system layouts and space limitations while maintaining efficient humidity exchange, providing higher compatibility and adaptability.

[0073] In some gas flow path selections, the dry gas inlet 11 is arranged close to the wet gas outlet, and the dry gas outlet 12 is arranged close to the wet gas inlet. In this embodiment, the dry gas inlet and outlet and the wet gas inlet and outlet are designed to allow the humidified gas and the humidified gas to enter and leave the membrane assembly 1 from opposite directions, respectively. Inside the shell 2, the humidified gas and the humidified gas move along the flow path formed by their corresponding inlets and outlets. The dry gas inlet 11 is arranged close to the direction of the wet gas outlet, and the dry gas outlet 12 is arranged close to the direction of the wet gas inlet. When the humidified gas and the humidified gas pass through the membrane assembly 1, the flow directions are opposite, forming a countercurrent humidity exchange. Through countercurrent humidity exchange, the humidifier can make more full use of the temperature and humidity differences between the humidified gas and the humidified gas, and improve the exchange efficiency of heat and humidity.

[0074] Since the working environment of the hydrogen energy humidifier is in a humid environment, there are extremely high requirements for the sealing technology of the humidifier product. The sealing performance and stability are important performance indicators of the hydrogen energy humidifier, which are directly related to the operating stability and safety of the entire fuel cell system. Based on this, the utility model achieves this purpose through the following technical measures: the membrane humidifier also includes: a sealing component, at least including a sealant, a potting compound and at least one sealing ring, the sealant is configured to seal the gap between the shell 2 and the dry side end cover 3; the potting compound is configured to seal the gap between the shell 2 and the membrane assembly 1; multiple sealing rings are configured to seal the gap between the shell 2 and the dry side end cover 3 and / or the wet side end cover 4.

[0075] Specifically, the potting glue can be set on both sides of the shell 2 to fix the membrane bundle frame and the hollow fiber membrane tube and allow the gas to flow inside the hollow fiber membrane tube. The sealant can be set between the shell 2 and the dry side end cover sealing ring 5 to seal the gap between the shell 2 and the dry side end cover 3. Among them, the dry side end cover sealing ring 5 is set on the sealing bone position of the shell 2 to seal the gap at the connection between the dry side end cover 3 and the shell 2; the wet side end cover sealing ring 6 is set in its sealing groove to seal the gap at the connection between the wet side end cover 4 and the shell 2. The sealing components work together to ensure the sealing between the various components inside the membrane humidifier to prevent water vapor leakage or gas leakage.

[0076] A preferred embodiment of the present invention is fully and specifically described below.

[0077] A membrane humidifier suitable for high-power fuel cells is provided with multiple moisture inlets and moisture outlets, which can be freely matched with the interface of the system fuel cell. Figures 1 to 3 As shown, it includes: a membrane assembly 1, a potting glue, a sealant, a shell 2, a dry side end cover 3, a wet side end cover 4, a dry side end cover sealing ring 5 and a wet side end cover sealing ring 6;

[0078] Among them, the first moisture inlet 7 and the second moisture inlet 8 are arranged at the left end of the two narrow sides of the shell 2, and the third moisture outlet 9 and the fourth moisture outlet 10 are arranged at the right end of the two narrow sides of the shell 2; the first moisture inlet 7 and the second moisture inlet 8 are symmetrical with respect to the shell 2, and the third moisture outlet 9 and the fourth moisture outlet 10 are symmetrical with respect to the shell 2; the first moisture inlet 7, the third moisture outlet 9 are connected to the hollow fiber membrane tube inside the shell 2; the second moisture inlet 8, the fourth moisture outlet 10 are connected to the hollow fiber membrane tube inside the shell 2; the third moisture outlet 9 is used to improve the adaptability of the humidifier; the outlet ends of the first moisture inlet 7, the second moisture inlet 8, the third moisture outlet 9 and the fourth moisture outlet 10 are all provided with docking flanges, and the docking flanges include a first flange and a second flange, and the first flange and the second flange are clamped and connected for connecting the four moisture inlets and outlets with the system.

[0079] A first moisture inlet 7 is provided at the left end of the narrow side of the shell 2, and a second moisture inlet 8 is provided at the other narrow side of the shell 2, so that the first moisture inlet 7 and the second moisture inlet 8 are vertically symmetrically provided on both sides of the shell 2, so that the first moisture inlet 7, the second moisture inlet 8 and the humidification pipeline inside the shell 2 are connected, so as to increase the gas volume of the humidified gas required after mixing, and enhance the adaptability of the membrane humidifier and the matching of the system. When the user uses one of the moisture outlets, the other moisture outlet is sealed to increase the humidification performance of the fuel cell humidifier. For example, if the stack needs high-humidity air, the two moisture inlets are opened at the same time, and the air flows out through one moisture outlet, then the humidification performance is greatly improved, and the space utilization rate is increased at the same time.

[0080] A first flange fixedly connected by bolts is installed at two moisture inlets respectively, and a second flange is clamped on the end face of the first flange to facilitate quick connection between the moisture inlet and the system, wherein the system refers to a general term for a fuel cell power generation device.

[0081] In order to make the membrane humidifier achieve the best reaction gas mixing ratio, dry side end covers 3 are respectively arranged on the left and right end surfaces of the shell 2, a dry gas inlet 11 is vertically arranged at the top near the fourth wet gas outlet 10, and a dry gas outlet 12 is vertically arranged at the top near the first wet gas inlet 7, so that dry compressed air flows in through the dry gas inlet 11, and the compressed air after humidity exchange is discharged from the shell 2 through the dry gas outlet 12. The first wet gas inlet 7 is arranged on the side adjacent to the dry gas outlet 12 to allow the water vapor generated after the fuel cell reaction to enter the humidifier for recycling.

[0082] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the term "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device.

[0084] The above is a detailed introduction to a membrane humidifier suitable for a high-power fuel cell provided by the present application. The principle and implementation method of the present application are described in detail using specific examples. The description of the above embodiments is only used to help understand the present application, and the content of this specification should not be understood as limiting the present application. At the same time, for a person skilled in the art, according to the present application, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present application.

Claims

1. A membrane humidifier suitable for high-power fuel cells, characterized in that: include: Membrane components, used to establish a humidity exchange environment; A housing containing the membrane assembly; Wherein, a dry gas inlet and a dry gas outlet are respectively provided at both ends of the shell, and the dry gas inlet and the dry gas outlet are both connected to the membrane assembly so as to circulate the humidified gas in the membrane assembly; Wherein, the shell is provided with at least two moisture inlets and at least two moisture outlets, and the moisture inlets are configured to input humidified gas into the membrane assembly in the shell; wherein, The at least one moisture inlet and the at least one moisture outlet are respectively located on the same side or different sides of the housing.

2. A membrane humidifier suitable for a high power fuel cell according to claim 1, characterized in that: The membrane humidifier also includes: At least one wet side end cover, each of the wet side end cover is mounted on the shell and is correspondingly connected to the wet gas inlet and / or the wet gas outlet; Wherein, the diameters of the plurality of wet side end covers are the same or different.

3. A membrane humidifier suitable for a high power fuel cell according to claim 2, characterized in that: The membrane humidifier also includes: Two dry-side end covers, which are arranged at corresponding ends of the shell and are respectively provided with the dry gas inlet and the dry gas outlet; Wherein, the dry gas inlet and the dry gas outlet are arranged in the same direction or in different directions.

4. A membrane humidifier suitable for a high power fuel cell according to claim 3, characterized in that: Each of the wet-side end covers is in a venturi shape; and / or each of the dry-side end covers is in a trapezoidal shape or a wedge shape.

5. A membrane humidifier suitable for a high power fuel cell according to claim 1, characterized in that: Each of the moisture inlet and the moisture outlet is located on a corresponding narrow side of the shell, and has the same width as the narrow side in the width direction; wherein, Along the length direction of the narrow side surface, the plurality of moisture inlets and the plurality of moisture outlets are respectively located in the middle or at the edge of the narrow side surface.

6. A membrane humidifier suitable for a high power fuel cell according to claim 1, characterized in that: The dry gas inlet is arranged close to the wet gas outlet, and the dry gas outlet is arranged close to the wet gas inlet.

7. A membrane humidifier suitable for a high power fuel cell according to claim 1, characterized in that: The membrane assembly comprises a membrane bundle frame and a plurality of hollow fiber membrane tubes connected to each other; wherein the side surface of the membrane bundle frame is in an arch bridge shape.

8. A membrane humidifier suitable for a high power fuel cell according to claim 7, characterized in that: The shell is hollow inside to form a plurality of inner cavities, and the membrane bundle frame is placed in each inner cavity; wherein the outer surface of the membrane bundle frame is provided with a buckle matching the corresponding inner cavity.

9. A membrane humidifier suitable for a high power fuel cell according to claim 3, characterized in that: The membrane humidifier also includes: The sealing assembly comprises at least a sealant, a potting compound and at least one sealing ring, wherein the sealant is configured to seal the gap between the shell and the dry side end cover; the potting compound is configured to seal the gap between the shell and the membrane assembly; and the plurality of sealing rings are configured to seal the gap at the connection between the shell and the dry side end cover and / or the wet side end cover.

10. A membrane humidifier suitable for a high power fuel cell according to any one of claims 1 to 9, characterized in that: The moisture inlet and the moisture outlet are both provided with two, and the two moisture inlets are symmetrical with respect to the shell, and the two moisture outlets are symmetrical with respect to the shell.

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