CN113471487A - Hydrogen fuel cell humidifying system and humidifying method - Google Patents
Hydrogen fuel cell humidifying system and humidifying method Download PDFInfo
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- CN113471487A CN113471487A CN202110741547.7A CN202110741547A CN113471487A CN 113471487 A CN113471487 A CN 113471487A CN 202110741547 A CN202110741547 A CN 202110741547A CN 113471487 A CN113471487 A CN 113471487A
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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
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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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
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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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04253—Means for solving freezing problems
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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
- H01M8/04291—Arrangements for managing water in solid electrolyte fuel cell systems
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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
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Abstract
The invention relates to the technical field of fuel cells, and discloses a hydrogen fuel cell humidifying system and a humidifying method, wherein the humidifying method comprises the following steps: during the starting process of the fuel cell, air is conveyed into the humidifying device through an air compressor, and atomized water is conveyed into the humidifying device through an atomizing device; when the fuel cell stops, air is conveyed into the atomizing device through the air compressor, so that stored water in the atomizing device is blown to a discharge port to be discharged. Therefore, air for reaction is provided for the electric pile through the air compressor, and the atomization device is swept through the air compressor when the fuel cell is stopped, so that water in the atomization device can be effectively prevented from freezing, and the hydrogen fuel cell system can be started smoothly in a low-temperature environment.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a hydrogen fuel cell humidifying system and a humidifying method.
Background
A hydrogen fuel cell is a power generation device that converts chemical energy of hydrogen and oxygen into electric energy, and its basic principle is the reverse reaction of electrolysis of water:
h2 passes through the anode carbon fiber diffusion layer in a gas state and is separated into H protons and electrons in the catalyst layer, and the H protons (in a state of H3O +) pass through the proton exchange membrane and are combined with O ions in the cathode catalyst layer to generate water.
Theoretically, the proton exchange membrane can only pass through protons, and the membrane material has a plurality of sulfonic acid groups, so that the proton exchange membrane can only have higher proton conductivity under the wet condition. Therefore, in general, both the anode hydrogen and the cathode air must be humidified, and water is produced by the reaction at the cathode side and migrates through the membrane to the other side under the difference in water concentration gradient at both sides.
At present, in a hydrogen fuel cell system, most fuel cell stacks (i.e. electric stacks) need external humidification to realize a humidification function, the humidification plays a crucial role in the performance and reliability of a fuel cell engine, and how to realize the humidification function efficiently, reliably, controllably and with low cost is very important.
In addition, water is often stored in a water supply pipeline for humidifying the electric pile, and the water is easy to freeze in a low-temperature environment, so that the normal starting and operation of the hydrogen fuel cell system are influenced. Therefore, how to realize the low-temperature start of the hydrogen fuel cell system is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for humidifying a hydrogen fuel cell, which can effectively prevent water in a water supply pipeline from freezing and ensure that the hydrogen fuel cell system can be started smoothly in a low temperature environment.
In order to achieve the purpose, the invention provides the following technical scheme:
a hydrogen fuel cell humidification method comprising:
during the starting process of the fuel cell, air is conveyed into the humidifying device through an air compressor, and atomized water is conveyed into the humidifying device through an atomizing device;
when the fuel cell is stopped, air is delivered into the atomizing device through an air compressor, so that stored water in the atomizing device is swept to a discharge port to be discharged.
A hydrogen fuel cell humidification system suitable for the above hydrogen fuel cell humidification method, the hydrogen fuel cell humidification system comprising a humidification device, a gas supply system, a water supply system, and an exhaust branch, wherein:
the air supply system is internally provided with an air compressor, a first connecting pipeline is arranged between an outlet of the air compressor and a dry side air inlet of the humidifying device, and the first connecting pipeline is provided with a first connecting port and a first switch valve positioned at the downstream of the first connecting port;
the water supply system is internally provided with a water tank, a water pump and an atomizing device which are sequentially connected in series, a second connecting pipeline is arranged between an outlet of the atomizing device and a wet side water inlet of the humidifying device, and the second connecting pipeline is provided with a second connecting port and a second switch valve positioned at the downstream of the second connecting port;
a third connecting pipeline is arranged between the first connecting port and the second connecting port, and the third connecting pipeline is provided with a third switch valve;
the connecting pipeline between the water tank and the atomizing device is connected with the discharge branch, and the discharge branch is provided with a fourth switch valve.
Optionally, in the above hydrogen fuel cell humidification system, a particulate filter is further disposed between the water tank and the water pump.
Alternatively, in the above hydrogen fuel cell humidification system, the water tank and the particulate filter communicate with each other through a fourth connection line, and the discharge branch is provided on the fourth connection line.
A hydrogen fuel cell humidification system suitable for the above hydrogen fuel cell humidification method, the hydrogen fuel cell humidification system comprising a humidification device, a gas supply system, a water supply system, and an exhaust branch, wherein:
the air supply system is internally provided with an air compressor, a first connecting pipeline is arranged between an outlet of the air compressor and a dry side air inlet of the humidifying device, and the first connecting pipeline is provided with a first connecting port and a first switch valve positioned at the downstream of the first connecting port;
the water supply system is internally provided with a water tank, a water pump and an atomizing device which are sequentially connected in series, a second connecting pipeline is arranged between an outlet of the atomizing device and a wet side water inlet of the humidifying device, and the second connecting pipeline is provided with a second connecting port and a second switch valve positioned at the downstream of the second connecting port;
a third connecting port is arranged on a connecting pipeline between the water tank and the atomization device;
a third connecting pipeline is arranged between the first connecting port and the third connecting port, and the third connecting pipeline is provided with a third switch valve;
the discharge branch is connected with the second connecting port and provided with a fourth switch valve.
Optionally, in the above hydrogen fuel cell humidification system, both ends of the air compressor are respectively provided with a chemical air filter and an intercooler.
Optionally, in the above hydrogen fuel cell humidification system, the atomization device is provided with a plurality of branch units in parallel, and each branch unit is provided with an atomization nozzle and a fifth switch valve for controlling the opening and closing of the branch unit.
Optionally, in the above hydrogen fuel cell humidification system, the water pump and each of the fifth switch valves are in signal connection with a fuel cell controller to adjust the rotation speed of the water pump and the opening number of the fifth switch valves according to the humidification requirement of the hydrogen fuel cell humidification system.
Alternatively, in the above hydrogen fuel cell humidification system, the dry side air inlet and the wet side water inlet are respectively located on both sides of the humidification apparatus, and an air intake direction of the dry side air inlet is opposite to an air intake direction of the wet side water inlet.
Optionally, in the above hydrogen fuel cell humidification system, further comprising:
the pipeline heating system is used for heating and deicing a connecting pipeline between the galvanic pile and the humidifying device;
and/or a water tank heating system for heating the water tank to remove ice;
and/or the heat-preservation cotton is coated on the outer layer of the water tank.
According to the technical scheme, the fuel cell humidifying method and the hydrogen fuel cell humidifying system provided by the invention have the advantages that air for reaction is provided for the electric pile through the air compressor, and the atomizing device is blown through the air compressor when the fuel cell is stopped, so that water in the atomizing device can be effectively prevented from being frozen, and the hydrogen fuel cell system can be started smoothly in a low-temperature environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 drawings without creative efforts.
FIG. 1 is a schematic flow chart of a hydrogen fuel cell humidification system under humidification conditions according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a hydrogen fuel cell humidification system under purging conditions according to a first embodiment of the present invention;
fig. 3 is a schematic view of a connection structure of an atomizing device according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of the direction of the spray of air and atomized water into the humidifier apparatus according to the first embodiment of the present invention;
fig. 5 is a control demand schematic diagram of a humidification method for a hydrogen fuel cell according to a first embodiment of the present invention;
FIG. 6 is a schematic flow chart of a hydrogen fuel cell humidification system under purging conditions according to a second embodiment of the present invention;
fig. 7 is a schematic flow chart of a hydrogen fuel cell humidification system under purging conditions according to a third embodiment of the present invention.
Wherein:
1-chemical air filter, 2-air compressor, 3-intercooler, 4-humidifying device, 5-electric pile,
6-a water tank, 7-a particle filter, 8-a water pump, 9-an atomizing device, 10-a gas-water separator,
91-an atomizing spray head, 92-a fifth switch valve,
101-a first on-off valve, 102-a second on-off valve,
103-a third switch valve and 104-a fourth switch valve.
Detailed Description
The invention discloses a hydrogen fuel cell humidifying method and a hydrogen fuel cell humidifying system, which can effectively avoid the icing of water in a water supply pipeline and ensure the smooth starting of the hydrogen fuel cell system in a low-temperature environment.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
First embodiment
A first embodiment of the present invention provides a method for humidifying a hydrogen fuel cell, comprising:
in the starting process of the fuel cell, air is conveyed into the humidifying device 4 through the air compressor 2 (namely, an electric air compressor), atomized water (namely, atomized water) is conveyed into the humidifying device 4 through the atomizing device 9, and the atomized water and the air are mixed and then enter the electric pile 5 (namely, a fuel cell pile), so that the aim of humidifying reactant gas is fulfilled; (the direction of the air flow in the process can be seen in the direction of the arrows in FIG. 1)
When the fuel cell is stopped, air is delivered into the atomizing device 9 through the air compressor 2 so as to purge the stored water in the atomizing device 9 to a discharge port for discharge. (the direction of the air flow in this process can be seen in the direction of the arrows in FIG. 2.)
It can be seen that, in the humidification method for a hydrogen fuel cell provided in the first embodiment of the present invention, air for reaction is provided to the inside of the stack 5 by the air compressor 2, and the atomization device 9 is purged by the air compressor 2 when the fuel cell is stopped, so that water in the atomization device 9 can be effectively prevented from freezing, and the hydrogen fuel cell system can be ensured to be started smoothly in a low temperature environment.
In order to realize the above-mentioned hydrogen fuel cell humidifying method, the first embodiment of the invention also provides a hydrogen fuel cell humidifying system suitable for the above-mentioned hydrogen fuel cell humidifying method. Referring to fig. 1 to 5, the hydrogen fuel cell humidification system includes a humidification apparatus 4, an air supply system, a water supply system, and an exhaust branch. Wherein:
an air compressor 2 is arranged in the air supply system, a first connecting pipeline is arranged between an outlet of the air compressor 2 and a dry side air inlet of the humidifying device 4, and the first connecting pipeline is provided with a first connecting port and a first switch valve 101 positioned at the downstream of the first connecting port;
the water supply system is provided with a water tank 6, a water pump 8 and an atomizing device 9 which are sequentially connected in series, a second connecting pipeline is arranged between an outlet of the atomizing device 9 and a wet side water inlet of the humidifying device 4, and the second connecting pipeline is provided with a second connecting port and a second switch valve 102 positioned at the downstream of the second connecting port;
a third connecting pipeline is arranged between the first connecting port and the second connecting port, and the third connecting pipeline is provided with a third on-off valve 103;
the connecting line between the water tank 6 and the atomizing device 9 is connected with a discharge branch, and the discharge branch is provided with a fourth switch valve 104.
The operation process of the hydrogen fuel cell humidifying system is as follows:
during the starting process of the fuel cell, the first switch valve 101 and the second switch valve 102 are opened, and the third switch valve 103 and the fourth switch valve 104 are closed, so that the dry air provided by the air supply system and the atomized water provided by the water supply system are input into the humidifying device 4 to be mixed and then enter the electric pile 5;
when the fuel cell is stopped, the first switch valve 101 and the second switch valve 102 are closed, and the third switch valve 103 and the fourth switch valve 104 are opened, so that the atomization device 9 is reversely purged by the air flow provided by the air compressor 2, the residue of water in the water supply pipeline and the atomization device 9 is reduced, and the difficulty in low-temperature starting is avoided.
Specifically, in the above-described hydrogen fuel cell humidification system, a particulate filter 7 is further provided between the water tank 6 and the water pump 8, the water tank 6 and the particulate filter 7 are communicated through a fourth connection pipe, and the above-described discharge branch provided with the fourth switching valve 104 is provided on the fourth connection pipe. Thus, during reverse purging, the air flow passes through the atomization device 9, the water pump 8 and the particle filter 7 in sequence. In this process, not only can the water in the particulate filter 7 be blown out to avoid low-temperature icing, but also the particulate filter can be used for certain cleaning.
Specifically, in the above-described hydrogen fuel cell humidification system, both ends of the air compressor 2 are provided with the chemical air filter 1 and the intercooler 3, respectively. The first connection port is preferably arranged downstream of the charge air cooler 3 (see in particular fig. 1, 2), or, in other embodiments, may be arranged upstream of the charge air cooler 3 (see in particular fig. 7, i.e. the third embodiment described below).
Specifically, referring to fig. 3, a plurality of branch units are connected in parallel in the atomization device 9, and each branch unit is provided with an atomization nozzle 91 and a fifth switch valve 92 for controlling the opening and closing of the branch unit. Further, the water pump 8 and each of the fifth switching valves 92 are in signal connection with the fuel cell controller to adjust the rotational speed of the water pump 8 and the number of openings of the fifth switching valves 92 in accordance with the humidification demand of the hydrogen fuel cell humidification system.
Specifically, in the working process of the fuel cell, when the output power of the whole hydrogen fuel cell needs to be adjusted, the adjusted working condition signal is sent out through the fuel cell controller, so that the opening and closing quantity of the fifth switch valve 92 and the rotating speed of the water pump 8 are controlled, the total quantity of atomized water entering the humidifier is adjusted, the humidification capacity of the humidification device 4 is adjusted by adjusting the rotating speed of the water pump 8 and the switching quantity of the fifth switch valve 92, the atomized water quantity of the atomization device can be adjusted, the humidification capacity of the humidification device is adjusted, the purpose that the humidification capacity can be adjusted finely and in a large range is achieved, and the effect of quick adjustment can be achieved.
See fig. 5 for the control requirement principle of the process: obtaining the current demand of the whole machine according to the power demand of the whole machine, and then solving the wet air flow demand, the hydrogen flow demand and the cooling flow demand, wherein the wet air flow demand is decomposed into a humidity demand and a dry air flow demand: the humidity requirement is mainly adjusted by the rotation speed change of the water pump 8 and the switching number of the fifth switching valve 92; the dry air flow demand is regulated by the change in the rotational speed of the air compressor 2 and the change in the opening of the back pressure valve.
In a specific embodiment:
if the output power of the whole fuel cell is changed greatly in a short time, or the output power of the whole fuel cell corresponding to a working condition signal sent by the fuel cell controller is changed greatly relative to the current working condition, namely the target power-the current power is larger than a preset value, for example, the vehicle is braked suddenly, or the vehicle is changed from a high-speed running state to a low speed, at the moment, the humidification requirement is changed greatly relative to the current working condition, the water content entering the humidification device 4 is controlled by adjusting the opening quantity of the fifth switch valve 92 and the rotating speed of the water pump, the action reaction speed is high, and the purposes of realizing the humidification function and adjusting the humidification effect in a high-efficiency, reliable, controllable and low-cost manner can be achieved;
if the output power change of the whole fuel cell is small, or in other words, the output power of the whole fuel cell corresponding to the working condition signal sent by the fuel cell controller is small relative to the change of the current working condition, namely the target power-the current power is less than the preset value, for example, the vehicle speed is accelerated from 23 steps to 40 steps, or the vehicle speed is accelerated from 100 steps to 130 steps, at the moment, the humidification requirement is small relative to the change of the current working condition, the water content entering the humidification device 4 can be adjusted by adjusting the rotating speed of the water pump 8, and therefore the aim of fine adjustment/stepless adjustment of the humidification effect is achieved.
Specifically, in the working process of the fuel cell, the humidifying device 4 mainly provides a place for mixing dry air and wet air (namely atomized water), and uses a bidirectional convection structure to accelerate the mixing effect of the wet air and the dry air for drying and mixing the wet air, thereby finally realizing the function of humidifying the dry air. Referring to fig. 4, in the humidifier 4, a dry side air inlet connected to an air supply system and a wet side water inlet connected to the atomizer 9 are respectively located at two sides of the humidifier 4, and an air intake direction of the dry side air inlet is opposite to an air intake direction of the wet side water inlet.
Specifically, during the operation of the fuel cell, the method further comprises the following steps: the heat preservation cotton is coated on the outer layer of the water tank 6; and/or a pipeline heating system for heating and deicing the connecting pipeline between the galvanic pile 5 and the humidifying device 4; and/or a tank heating system for heating the tank 6 for de-icing. When the fuel cell controller sends a start signal and the temperature detected by the temperature sensor is lower than a preset value (for example, lower than zero degrees), namely, when the fuel cell controller is started at a low temperature, the pipeline heating system and the water tank heating system are controlled to be started, so that the water supply pipeline and the water tank 6 are heated and deiced respectively through the pipeline heating system and the water tank heating system, and difficulty in starting at the low temperature is avoided.
In summary, the first embodiment of the present invention provides a hydrogen fuel cell humidification system, which operates as follows:
firstly, adding a certain amount of deionized water into a water tank 6, in the working process of a fuel cell engine system, enabling water generated by an electric pile 5 to enter the water tank 6 through a gas-water separator 10, pumping the deionized water in the water tank 6 into an atomization device 9 through a water pump 8 after passing through a particle filter 7, and enabling the deionized water to enter a humidifying device 4 after being atomized through the atomization device 9; meanwhile, air in the atmosphere passes through the chemical air filter 1, is pressurized by the air compressor 2, then enters the intercooler 3 for cooling, then enters the humidifying device 4 for mixing with atomized deionized water, and enters the electric pile 5 for reaction after being fully mixed.
When the fuel cell controller monitors that the internal temperature of a fuel cell engine system is low, in order to avoid the phenomenon that deionized water is frozen to block pipelines and parts in a low-temperature (less than 0 ℃), heating and ice-melting treatment are required to be carried out: because the outer layer of all the pipelines between the electric pile 5 and the mixing device 4 is wound with the heating wires (namely the pipeline heating system) powered by low-voltage electricity, and the heating wires (namely the water tank heating system) powered by low-voltage electricity are arranged in the water tank 6, the pipelines and the deionized water at opposite positions can be heated before the fuel cell engine system is started at low temperature, and the ice breaking treatment is carried out.
In addition, because the outer parcel of water tank keeps warm cotton to can reduce the frozen risk of low temperature.
Moreover, before the shutdown, the atomization device 9, the water pump 8 and the particle filter 7 are purged by compressed air after the intercooler 3, so that deionized water in the atomization device is reduced, and freezing at low temperature can be avoided.
It should be noted that, in practice, the system capable of implementing the above-mentioned humidification method for a hydrogen fuel cell has various arrangements, and particularly, reference may be made to the second embodiment and the third embodiment of the present invention.
Second embodiment
A second embodiment of the present invention provides a hydrogen fuel cell humidification system which can also be applied to the hydrogen fuel cell humidification method provided in the above first embodiment, differing from the hydrogen fuel cell humidification system provided in the above first embodiment only in that: when the fuel cell is stopped, the air flow direction for purging provided by the air compressor 2 is positive purging, namely the air flow direction for purging is the same as the water supply direction of the water supply system in the starting process of the fuel cell.
Specifically, referring to fig. 6, a hydrogen fuel cell humidification system according to a second embodiment of the present invention includes a humidification apparatus 4, an air supply system, a water supply system, and a discharge branch, wherein:
an air compressor 2 is arranged in the air supply system, a first connecting pipeline is arranged between an outlet of the air compressor 2 and a dry side air inlet of the humidifying device 4, and the first connecting pipeline is provided with a first connecting port and a first switch valve 101 positioned at the downstream of the first connecting port;
the water supply system is provided with a water tank 6, a water pump 8 and an atomizing device 9 which are sequentially connected in series, a second connecting pipeline is arranged between an outlet of the atomizing device 9 and a wet side water inlet of the humidifying device 4, and the second connecting pipeline is provided with a second connecting port and a second switch valve 102 positioned at the downstream of the second connecting port; the discharge branch is connected with the second connecting port, and is provided with a fourth switch valve 104;
a third connecting port is arranged on a connecting pipeline between the water tank 6 and the atomizing device 9, and particularly, the third connecting port is arranged on a connecting pipeline between an outlet of the water tank 6 and a water inlet of the particle filter; a third connecting pipeline is arranged between the first connecting port and the third connecting port, and a third on-off valve 103 is arranged on the third connecting pipeline.
Third embodiment
Referring to fig. 7, a hydrogen fuel cell humidification system according to a third embodiment of the present invention can also be applied to the hydrogen fuel cell humidification method according to the first embodiment, which is different from the hydrogen fuel cell humidification system according to the first embodiment only in that: the first connecting port for connecting the third connecting pipeline in the air supply system is arranged at the upstream of the intercooler 3, namely the connecting pipeline between the air compressor 2 and the intercooler 3.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of humidifying a hydrogen fuel cell, comprising:
in the starting process of the fuel cell, air is conveyed into the humidifying device (4) through the air compressor (2), and atomized water is conveyed into the humidifying device (4) through the atomizing device (9);
when the fuel cell is stopped, air is conveyed into the atomizing device (9) through the air compressor (2) so as to purge the stored water in the atomizing device (9) to a discharge port for discharging.
2. A hydrogen fuel cell humidification system adapted for use in the hydrogen fuel cell humidification method as claimed in claim 1, characterized in that the hydrogen fuel cell humidification system comprises a humidification means (4), a gas supply system, a water supply system, a discharge branch, wherein:
an air compressor (2) is arranged in the air supply system, a first connecting pipeline is arranged between an outlet of the air compressor (2) and a dry side air inlet of the humidifying device (4), and the first connecting pipeline is provided with a first connecting port and a first switch valve (101) located at the downstream of the first connecting port;
a water tank (6), a water pump (8) and an atomizing device (9) are sequentially connected in series in the water supply system, a second connecting pipeline is arranged between an outlet of the atomizing device (9) and a wet side water inlet of the humidifying device (4), and the second connecting pipeline is provided with a second connecting port and a second switch valve (102) located on the downstream of the second connecting port;
a third connecting pipeline is arranged between the first connecting port and the second connecting port, and the third connecting pipeline is provided with a third on-off valve (103);
the connecting pipeline between the water tank (6) and the atomizing device (9) is connected with the discharge branch, and the discharge branch is provided with a fourth switch valve (104).
3. The hydrogen fuel cell humidification system according to claim 2, wherein a particulate filter (7) is further provided between the water tank (6) and the water pump (8).
4. A hydrogen fuel cell humidification system as claimed in claim 3 wherein the water tank (6) and the particulate filter (7) communicate through a fourth connection line, the discharge branch being provided on the fourth connection line.
5. A hydrogen fuel cell humidification system adapted for use in the hydrogen fuel cell humidification method as claimed in claim 1, characterized in that the hydrogen fuel cell humidification system comprises a humidification means (4), a gas supply system, a water supply system, a discharge branch, wherein:
an air compressor (2) is arranged in the air supply system, a first connecting pipeline is arranged between an outlet of the air compressor (2) and a dry side air inlet of the humidifying device (4), and the first connecting pipeline is provided with a first connecting port and a first switch valve (101) located at the downstream of the first connecting port;
a water tank (6), a water pump (8) and an atomizing device (9) are sequentially connected in series in the water supply system, a second connecting pipeline is arranged between an outlet of the atomizing device (9) and a wet side water inlet of the humidifying device (4), and the second connecting pipeline is provided with a second connecting port and a second switch valve (102) located on the downstream of the second connecting port;
a third connecting port is arranged on a connecting pipeline between the water tank (6) and the atomizing device (9);
a third connecting pipeline is arranged between the first connecting port and the third connecting port, and the third connecting pipeline is provided with a third on-off valve (103);
the discharge branch is connected with the second connecting port, and is provided with a fourth switch valve (104).
6. The humidification system of a hydrogen fuel cell according to any one of claims 2 to 5, wherein both ends of the air compressor (2) are provided with a chemical air filter (1) and a intercooler (3), respectively.
7. The humidification system of a hydrogen fuel cell according to any one of claims 2 to 5, wherein a plurality of branch units are provided in parallel in the atomization device (9), and each branch unit is provided therein with an atomization nozzle (91) and a fifth switching valve (92) for controlling the opening and closing of the branch unit.
8. The hydrogen fuel cell humidification system as claimed in claim 7, wherein the water pump (8) and each of the fifth switching valves (92) are in signal connection with a fuel cell controller to adjust the rotation speed of the water pump (8) and the number of openings of the fifth switching valves (92) according to the humidification demand of the hydrogen fuel cell humidification system.
9. The humidification system for a hydrogen fuel cell according to any one of claims 2 to 5, wherein the dry side air inlet and the wet side water inlet are respectively located on both sides of the humidification device (4) in the humidification device (4), and an air intake direction of the dry side air inlet is opposite to an air intake direction of the wet side water inlet.
10. The hydrogen fuel cell humidification system of any one of claims 2 to 5, further comprising:
the pipeline heating system is used for heating and deicing a connecting pipeline between the galvanic pile (5) and the humidifying device (4);
and/or a water tank heating system for heating and deicing the water tank (6);
and/or the heat preservation cotton is coated on the outer layer of the water tank (6).
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