CN112018411B - Humidification system of fuel cell and control method thereof - Google Patents
Humidification system of fuel cell and control method thereof Download PDFInfo
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- CN112018411B CN112018411B CN202010868761.4A CN202010868761A CN112018411B CN 112018411 B CN112018411 B CN 112018411B CN 202010868761 A CN202010868761 A CN 202010868761A CN 112018411 B CN112018411 B CN 112018411B
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
- H01M8/04149—Humidifying by diffusion, e.g. making use of membranes
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04828—Humidity; Water content
- H01M8/04835—Humidity; Water content of fuel cell reactants
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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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Abstract
The invention relates to the technical field of humidification of fuel cells, and discloses a humidification system of a fuel cell and a control method thereof. Wherein the humidification system of the fuel cell comprises: the humidifier comprises a shell and a water transmission piece, wherein an installation cavity is defined in the shell, the water transmission piece is arranged in the installation cavity, one of a first gas entering the fuel cell and a second gas flowing out of an exhaust channel of the fuel cell flows inside the water transmission piece, and the other one of the first gas and the second gas flows outside the water transmission piece; a bypass valve in communication with the exhaust passage; a first humidity sensor for detecting humidity of the first gas; and the current sensor is connected with the fuel cell. When the difference between the humidity of the first gas entering the fuel cell and the preset humidity detected by the first humidity sensor is large, the humidification system of the fuel cell realizes the preliminary adjustment of the humidity of the first gas entering the fuel cell by changing the opening degree of the bypass valve, so that the humidification system of the fuel cell meets the humidity of the first gas under the corresponding working condition.
Description
Technical Field
The invention relates to the technical field of humidification of fuel cells, in particular to a humidification system of a fuel cell and a control method thereof.
Background
The fuel cell has the working principle that hydrogen and air are respectively introduced to two ends of a proton exchange membrane through a two-stage plate flow channel, the reaction of the hydrogen and the oxygen is accelerated through a catalyst on the proton exchange membrane, electrons generated in the reaction process are used for driving a motor to work, and generated product water is discharged into the atmosphere through an exhaust channel. No harmful substance is generated in the whole working process, but the working environment of the proton exchange membrane needs to have certain humidity. Since the humidity of the air in the external environment generally cannot meet the requirement, the humidity of the air needs to be increased by an external humidification method. If the humidity of the air is too high, the water generated by the reaction blocks the exhaust passage, reducing the reaction efficiency, and therefore the humidity of the air introduced into the fuel cell is critical to the reaction efficiency of the fuel cell.
Most of the existing humidification systems for fuel cells are controlled by temperature, that is, quantitative humidification at different temperatures is realized according to the internal temperature of the fuel cell, but the humidity of the gas cannot be dynamically adjusted according to the actual reaction condition of the fuel cell.
Disclosure of Invention
Based on the above, the present invention provides a humidification system for a fuel cell and a control method thereof, which solve the problem that the humidity of the inlet air cannot be dynamically adjusted according to the working condition requirement of the fuel cell in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a humidification system for a fuel cell, comprising: the humidifier comprises a shell and a water transmission piece, wherein a mounting cavity is defined in the shell, the water transmission piece is arranged in the mounting cavity, one of a first gas entering a fuel cell and a second gas flowing out of an exhaust channel of the fuel cell flows inside the water transmission piece, and the other one of the first gas and the second gas flows outside the water transmission piece; a bypass valve communicating with the exhaust passage to enable the second gas flowing out of the exhaust passage to be directly discharged through the bypass valve; a first humidity sensor for detecting a humidity of the first gas entering the fuel cell; a current sensor connected to the fuel cell to detect a current output by the fuel cell.
As a preferable scheme of the humidification system of the fuel cell, the humidifier further includes a first partition plate and a second partition plate, the first partition plate and the second partition plate are respectively located at two ends of the water transmission member, the first partition plate and the housing enclose a first chamber, the second partition plate and the housing enclose a second chamber, the first partition plate, the second partition plate, the water transmission member and the housing enclose a flow chamber, and the first chamber and the second chamber are both communicated with the inside of the water transmission member or both communicated with the flow chamber.
As a preferred scheme of a humidification system of a fuel cell, be equipped with on the casing and be used for getting into first air inlet of first gas and be used for discharging first gas's first exhaust port, first air inlet with first cavity intercommunication, first exhaust port with the second cavity intercommunication, first cavity with the second cavity all with the inside intercommunication of water transmission piece, be equipped with a plurality of third baffle in the first cavity, a plurality of the third baffle sets up at intervals in proper order just forms snakelike runner on the casing, first gas warp first air inlet with snakelike runner gets into first cavity.
As a preferable scheme of the humidification system of the fuel cell, the housing is provided with a second gas inlet for entering the second gas and a second gas outlet for discharging the second gas, and both the second gas inlet and the second gas outlet are communicated with the flow chamber.
As a preferred scheme of the humidification system of the fuel cell, a guide plate is arranged in the installation cavity, the guide plate is located between the second air inlet and the second air outlet, one end of the guide plate is arranged on the shell, and the other end of the guide plate and the shell are arranged at intervals.
As a preferable scheme of the humidification system of the fuel cell, the number of the water transmission pieces is several, and the several water transmission pieces are arranged at intervals.
As a preferable aspect of the humidification system for a fuel cell, the water transport member is a columnar water transport membrane.
As a preferable aspect of the humidification system for a fuel cell, the humidification system for a fuel cell further includes a second humidity sensor for detecting a humidity of the first gas entering the humidifier.
A control method of a humidification system of a fuel cell according to any one of the above aspects, comprising the steps of: the current of the fuel cell detected by the current sensor is output current, and corresponding preset humidity under the corresponding working condition of the fuel cell is obtained according to the output current; the first humidity sensor detects that the humidity of the first gas entering the fuel cell is detected humidity, and if the detected humidity is greater than the preset humidity, the opening degree of the bypass valve is increased; and if the detected humidity is smaller than the preset humidity, reducing the opening of the bypass valve.
As a preferable mode of the control method of the humidification system for a fuel cell, when the detected humidity is less than the preset humidity, the gas flow rates of the first gas and the hydrogen gas entering the fuel cell are reduced.
The invention has the beneficial effects that: the invention discloses a fuel cell humidification system, which is additionally provided with a bypass valve capable of adjusting the gas flow of second gas entering a humidifier, obtains the preset humidity of the second gas entering the fuel cell under corresponding working conditions according to the current detected by a current sensor, and realizes the preliminary adjustment of the humidity of first gas entering the fuel cell by changing the opening degree of the bypass valve when the difference between the humidity of the first gas entering the fuel cell and the preset humidity is larger, so that the humidity of the first gas entering the fuel cell under corresponding working conditions is met, and the reaction rate of the fuel cell is further improved.
The control method of the fuel cell humidification system can adjust the opening of the bypass valve in real time according to the detected humidity of the first gas and the corresponding preset humidity under the corresponding working condition, so that the detected humidity of the first gas discharged by the humidifier is close to the preset humidity entering the fuel cell under the corresponding working condition, and the reaction rate of the fuel cell is finally improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a humidifier and bypass valve provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram of a humidification system for a fuel cell according to an embodiment of the present invention.
In the figure:
1. a humidifier; 11. a housing; 1101. a first air inlet; 1102. a first exhaust port; 1103. a second air inlet; 1104. a second exhaust port; 12. a water transport member; 13. a first separator; 130. a first chamber; 14. a second separator; 140. a second chamber; 150. a flow chamber; 16. a third partition plate; 160. a serpentine flow channel; 17. a baffle;
2. a bypass valve;
31. a first humidity sensor; 32. a second humidity sensor;
4. a current sensor;
5. a controller;
100. a fuel cell.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; 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 and 2, the present embodiment provides a humidification system for a fuel cell, including a humidifier 1, a bypass valve 2, a first humidity sensor 31, and a current sensor 4, where the humidifier 1 includes a housing 11 and a water transmission member 12, the housing 11 defines an installation cavity, the water transmission member 12 is disposed in the installation cavity, one of a first gas entering the fuel cell 100 and a second gas flowing out through an exhaust passage of the fuel cell 100 flows inside the water transmission member 12, and the other flows outside the water transmission member 12, the bypass valve 2 is communicated with the exhaust passage to enable the second gas flowing out through the exhaust passage to be directly discharged through the bypass valve 2, the first humidity sensor 31 is used to detect humidity of the first gas entering the fuel cell 100, and the current sensor 4 is connected to the fuel cell 100 to detect current output by the fuel cell 100.
It should be noted that the water transport member 12 only allows water vapor to pass through, but does not allow other gases to pass through. In this embodiment, the first gas entering the humidifier 1 is the outside air, the second gas entering the humidifier 1 is the gas with higher humidity generated after the reaction of the fuel cell 100, and the water vapor in the second gas is mixed into the first gas through the water transmission member 12 to humidify the first gas, so that the humidified first gas is introduced into the fuel cell 100 to participate in the chemical reaction of the fuel cell 100.
The gas flow of the second gas entering the humidifier 1 can be adjusted by the bypass valve 2 additionally arranged in the humidification system of the fuel cell provided by the embodiment, the preset humidity of the second gas entering the fuel cell 100 under the corresponding working condition is obtained according to the current detected by the current sensor 4, when the difference between the humidity of the first gas entering the fuel cell 100 and the preset humidity is large, which is detected by the first humidity sensor 31, the humidity of the first gas entering the fuel cell 100 is adjusted by changing the opening degree of the bypass valve 2, so that the humidity of the first gas entering the fuel cell 100 under the corresponding working condition is met, and the reaction rate of the fuel cell 100 is further improved.
It should be noted that the current sensor 4 of the present embodiment is capable of detecting the current output by the fuel cell 100 in real time, and assuming that the fuel cell 100 reacts under ideal boundary conditions, an ideal humidity of the second gas entering the fuel cell 100 corresponding to the current can be obtained, and the ideal humidity of the second gas is the preset humidity.
As shown in fig. 1, the humidifier 1 of this embodiment further includes a first partition plate 13 and a second partition plate 14, the first partition plate 13 and the second partition plate 14 are respectively located at two ends of the water transmission member 12, the first partition plate 13 and the housing 11 enclose a first chamber 130, the second partition plate 14 and the housing 11 enclose a second chamber 140, the first partition plate 13, the second partition plate 14, the water transmission member 12 and the housing 11 enclose a flow chamber 150, and the first chamber 130 and the second chamber 140 are both communicated with the inside of the water transmission member 12. In other embodiments, it is also possible that both the first chamber 130 and the second chamber 140 are in communication with the flow chamber 150.
The first partition plate 13 of this embodiment is a first sealing member, the second partition plate 14 is a second sealing member, both the first sealing member and the second sealing member are sealing rings, and the first sealing member and the second sealing member can ensure that the first chamber 130 and the second chamber 140 are both isolated from the flow chamber 150, so as to prevent the first gas and the second gas from communicating.
Specifically, as shown in fig. 1, a first gas inlet 1101 for entering a first gas and a first gas outlet 1102 for discharging the first gas are arranged on the housing 11, the first gas inlet 1101 is communicated with the first chamber 130, the first gas outlet 1102 is communicated with the second chamber 140, both the first chamber 130 and the second chamber 140 are communicated with the inside of the water transmission member 12, a plurality of third partition plates 16 are arranged in the first chamber 130, the plurality of third partition plates 16 are sequentially arranged on the housing 11 at intervals and form a serpentine flow channel 160, and the first gas enters the first chamber 130 through the first gas inlet 1101 and the serpentine flow channel 160.
Further, the serpentine flow channel 160 can not only separate the liquid water drops in the first gas to prevent the liquid water drops in the first gas from entering the fuel cell 100 to block the exhaust channel of the fuel cell 100, thereby reducing the reaction rate of the fuel cell 100, but also reduce the flow speed of the first gas, increase the flow duration of the first gas in the water transmission member 12, make the first gas and the second gas have sufficient water transmission duration, improve the water transmission efficiency of the first gas and the second gas, and ensure that the first gas exhausted through the first exhaust port 1102 has sufficient humidity.
Specifically, as shown in fig. 1, a second gas inlet 1103 for entering the second gas and a second gas outlet 1104 for discharging the second gas are further disposed on the housing 11, and both the second gas inlet 1103 and the second gas outlet 1104 are communicated with the flow chamber 150. In order to enable the water vapor in the second gas to be transmitted into the first gas through the water transmission member 12, a guide plate 17 is arranged in the installation cavity, the guide plate 17 is located between the second air inlet 1103 and the second air outlet 1104, one end of the guide plate 17 is arranged on the shell 11, and the other end of the guide plate 17 is arranged at an interval with the shell 11.
Further, as shown in fig. 1, the baffle 17 of the present embodiment is connected to the housing 11 on three sides, and the second gas entering the flow chamber 150 flows along one side of the baffle 17 to the other side of the baffle 17 and finally is discharged from the second gas outlet 1104. Therefore, the additionally arranged guide plate 17 increases the contact time of the second gas and the water transmission member 12 by changing the flow direction of the second gas, and further improves the water transmission efficiency of the first gas and the second gas.
As shown in fig. 1, the number of the water conveying members 12 of the present embodiment is several, and the water conveying members 12 are arranged in a staggered and spaced manner. The water transmission member 12 is a columnar water transmission film, and a plurality of columnar water transmission films are distributed in parallel. The first gas flows in the columnar water transmission film, the second gas flows in the flow cavity 150, and the contact area between the first gas and the water transmission piece 12 and the contact area between the second gas and the water transmission piece 12 can be further increased by the plurality of water transmission pieces 12, so that the water transmission efficiency of the first gas and the second gas is further improved, and the humidity of the first gas exhausted from the first exhaust port 1102 is increased as much as possible.
As shown in fig. 1, the humidification system of the fuel cell of the present embodiment further includes a second humidity sensor 32, and the second humidity sensor 32 is provided at the first gas inlet 1101 to detect the humidity of the first gas entering the humidifier 1.
Specifically, the first humidity sensor 31 detects that the humidity of the first gas entering the fuel cell 100 is the detected humidity, and if the detected humidity is greater than the preset humidity, the opening degree of the bypass valve 2 is increased to reduce the gas flow rate of the second gas entering the humidifier 1, thereby reducing the detected humidity of the second gas discharged from the second gas outlet 1104 of the humidifier 1.
If the detected humidity is less than the preset humidity, the opening of the bypass valve 2 is decreased. The opening degree of the bypass valve 2 is decreased, increasing the gas flow rate of the second gas entering the humidifier 1, so that the detected humidity of the second gas discharged from the second exhaust port 1104 of the humidifier 1 is increased. If the detected humidity of the first gas entering the fuel cell 100 after the bypass valve 2 is completely closed is still less than the preset humidity, the flow rates of the first gas and the hydrogen gas entering the fuel cell 100 should be reduced, so as to further increase the detected humidity of the second gas discharged from the second gas outlet 1104 of the humidifier 1. The amount of decrease in the gas flow rate of the first gas is calculated based on the humidity of the first gas entering the humidifier 1 detected by the second humidity sensor 32 and the detected humidity of the first gas entering the fuel cell 100, so that the detected humidity of the first gas entering the fuel cell 100 reaches the preset humidity.
Preferably, as shown in fig. 2, the humidification system for a fuel cell of the present embodiment further includes a controller 5, the controller 5 is connected to the current sensor 4, the first humidity sensor 31 and the second humidity sensor 32, the current sensor 4 detects that the current output by the fuel cell 100 can be transmitted to the controller 5, the preset humidity corresponding to the corresponding operating condition of the fuel cell 100 is obtained according to the current detected in real time, a signal of the humidity value of the second gas entering the fuel cell 100 detected by the first humidity sensor 31 and the humidity value of the first gas entering the humidifier 1 detected by the second humidity sensor 32 is transmitted to the controller 5, whether the opening of the bypass valve 2 needs to be adjusted is determined by comparing the preset humidity with the humidity detected by the first humidity sensor 31, and according to the humidity value of the first gas detected by the second humidity sensor 32, calculating the required gas flow of the first gas.
Specifically, the controller 5 of this embodiment may be a centralized or distributed controller 5, for example, the controller 5 may be a single-chip microcomputer or may be composed of a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to control the bypass valve 2, the first humidity sensor 31, and the second humidity sensor 32 to implement their functions.
The present embodiment also provides a control method of a humidification system for a fuel cell according to the present embodiment, including the steps of:
the current of the fuel cell 100 detected by the current sensor 4 is an output current, and a corresponding preset humidity of the fuel cell 100 under corresponding working conditions is obtained according to the output current;
the first humidity sensor 31 detects that the humidity of the first gas entering the fuel cell 100 is a detected humidity, and increases the opening degree of the bypass valve 2 if the detected humidity is greater than a preset humidity; if the detected humidity is less than the preset humidity, the opening of the bypass valve 2 is decreased.
When the detected humidity is less than the preset humidity, the gas flow rates of the first gas and the hydrogen gas entering the fuel cell 100 may also be reduced.
It should be noted that if the detected humidity does not differ greatly from the preset humidity, it is considered that the detected humidity of the first gas entering the fuel cell 100 at this time corresponds to the actual operating condition of the fuel cell 100, and at this time, it is not necessary to adjust the opening degree of the bypass valve 2, nor to adjust the gas flow rates of the first gas and the hydrogen gas.
The control method of the fuel cell humidification system provided in this embodiment can adjust the opening of the bypass valve 2 and the gas flow rates of the first gas and the hydrogen in real time according to the detected humidity of the first gas and the corresponding preset humidity under the corresponding working conditions, so that the detected humidity of the first gas discharged from the humidifier 1 approaches the preset humidity entering the fuel cell 100 under the corresponding working conditions, and finally the reaction rate of the fuel cell 100 is increased.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. A humidification system for a fuel cell, comprising:
a humidifier (1) including a housing (11) and a water transport member (12), the housing (11) defining a mounting chamber therein, the water transport member (12) being provided in the mounting chamber, one of a first gas entering a fuel cell (100) and a second gas flowing out through an exhaust passage of the fuel cell (100) flowing inside the water transport member (12), the other flowing outside the water transport member (12);
a bypass valve (2) communicating with the exhaust passage so that the second gas flowing out of the exhaust passage can be directly discharged through the bypass valve (2);
a first humidity sensor (31), the first humidity sensor (31) for detecting a humidity of the first gas entering the fuel cell (100);
the current sensor (4) is connected with the fuel cell (100) to detect the current output by the fuel cell (100), and the corresponding preset humidity under the corresponding working condition of the fuel cell (100) is obtained according to the output current;
a first partition plate (13) and a second partition plate (14), wherein the first partition plate (13) and the second partition plate (14) are respectively positioned at two ends of the water transmission member (12), the first partition plate (13) and the shell (11) enclose a first chamber (130), the second partition plate (14) and the shell (11) enclose a second chamber (140), the first partition plate (13), the second partition plate (14), the water transmission member (12) and the shell (11) enclose a flow chamber (150), and the first chamber (130) and the second chamber (140) are both communicated with the inside of the water transmission member (12) or both communicated with the flow chamber (150);
a second air inlet (1103) used for entering the second air and a second air outlet (1104) used for discharging the second air are arranged on the shell (11), and the second air inlet (1103) and the second air outlet (1104) are communicated with the flow cavity (150);
a guide plate (17) is arranged in the mounting cavity, the guide plate (17) is positioned between the second air inlet (1103) and the second air outlet (1104), one end of the guide plate (17) is arranged on the shell (11), and the other end of the guide plate (17) is arranged at intervals with the shell (11);
be equipped with on casing (11) and be used for getting into first gaseous first air inlet (1101) and be used for discharging first gaseous first exhaust port (1102), first air inlet (1101) with first cavity (130) intercommunication, first exhaust port (1102) with second cavity (140) intercommunication, first cavity (130) with second cavity (140) all with the inside intercommunication of water transmission piece (12), be equipped with a plurality of third baffle (16) in first cavity (130), a plurality of third baffle (16) interval sets gradually on casing (11) and form snakelike runner (160), first gaseous warp first air inlet (1101) with snakelike runner (160) get into first cavity (130).
2. The humidification system of a fuel cell according to claim 1, wherein the number of the water transfer members (12) is several, and the several water transfer members (12) are provided at intervals.
3. The humidification system of a fuel cell according to claim 2, wherein the water transport member (12) is a columnar water transport membrane.
4. The humidification system of a fuel cell according to claim 1, further comprising a second humidity sensor (32), the second humidity sensor (32) being configured to detect a humidity of the first gas entering the humidifier (1).
5. A control method of a humidification system of a fuel cell according to any one of claims 1 to 4, characterized by comprising the steps of:
the current sensor (4) detects that the current of the fuel cell (100) is output current, and corresponding preset humidity under corresponding working conditions of the fuel cell (100) is obtained according to the output current;
the first humidity sensor (31) detects that the humidity of the first gas entering the fuel cell (100) is a detected humidity, and if the detected humidity is greater than the preset humidity, the opening degree of the bypass valve (2) is increased; and if the detected humidity is smaller than the preset humidity, reducing the opening degree of the bypass valve (2).
6. The control method of a humidification system for a fuel cell according to claim 5, wherein when the detected humidity is less than the preset humidity, the gas flow rates of the first gas and hydrogen gas entering the fuel cell (100) are reduced.
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| CN202010868761.4A CN112018411B (en) | 2020-08-25 | 2020-08-25 | Humidification system of fuel cell and control method thereof |
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| CN202010868761.4A CN112018411B (en) | 2020-08-25 | 2020-08-25 | Humidification system of fuel cell and control method thereof |
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