CN115332564A - Hydrogen fuel cell system - Google Patents
Hydrogen fuel cell system Download PDFInfo
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- CN115332564A CN115332564A CN202211008542.4A CN202211008542A CN115332564A CN 115332564 A CN115332564 A CN 115332564A CN 202211008542 A CN202211008542 A CN 202211008542A CN 115332564 A CN115332564 A CN 115332564A
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- fuel cell
- hydrogen fuel
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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
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
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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
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
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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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
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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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
- H01M8/0687—Reactant purification by the use of membranes or filters
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a hydrogen fuel cell system, which comprises a hydrogen fuel cell stack, a suction device and a system controller, wherein the hydrogen fuel cell stack is provided with an air inlet and an air outlet, and the air inlet is used for introducing air or oxygen; the suction device is connected with the exhaust port and is used for sucking the exhaust port to enable the air inlet to intake air; the system controller is electrically connected with the hydrogen fuel cell stack and the suction device and is used for controlling the operation of the hydrogen fuel cell stack and the suction device. The technical scheme of the invention improves the traditional gas blowing mode into a suction mode, can prevent the gas pollution caused by the gas supply device from damaging the proton exchange membrane of the hydrogen fuel cell, and has wider selection range of the gas supply device.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a hydrogen fuel cell system.
Background
A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electric energy, and the hydrogen fuel cell receives more and more attention because a product of a chemical reaction is water and does not pollute the environment.
The existing air supply system for the hydrogen fuel cell generally adopts a blowing mode to supply air, an air supply device is arranged at the air inlet side of the hydrogen fuel cell, if the air supply device with oil lubrication is adopted to supply air, oil and gas can be blown into the hydrogen fuel cell, so that catalyst poisoning is caused, and the performance of the hydrogen fuel cell system is influenced; if the air supply device without oil lubrication is used for supplying air, the requirement on the air supply device is high, the air supply device needs a complex finish machining process and is high in price, the service time and the product reliability are poor, and frequent maintenance is needed.
Disclosure of Invention
The invention provides a hydrogen fuel cell system, which aims to solve the problems that the existing hydrogen fuel cell adopts a blowing air supply mode, the requirement on an air supply device is high, and the maintenance cost is high.
To achieve the above object, the present invention provides a hydrogen fuel cell system comprising:
a hydrogen fuel cell stack having an inlet port for inlet air or oxygen and an outlet port;
the suction device is connected with the exhaust port and is used for sucking the exhaust port to enable the air inlet to be fed; and
and the system controller is electrically connected with the hydrogen fuel cell stack and the suction device and is used for controlling the operation of the hydrogen fuel cell stack and the suction device.
In some embodiments, further comprising an air filtration device for filtering air, the air inlet being connected to the air filtration device.
In some embodiments, the air filter device further comprises a throttle valve, and the throttle valve is arranged on a communication pipeline between the air filter device and the air inlet and is used for controlling the air inlet flow of the air inlet.
In some embodiments, the system controller is configured with a delayed power-down module for controlling the throttle valve and the suction device to continue to operate to purge moisture in the hydrogen fuel cell when the hydrogen fuel cell is shut down.
In some embodiments, the system further comprises an intake pressure sensor and an air flow sensor, the intake pressure sensor is used for detecting the air intake pressure of the hydrogen fuel cell, the air flow sensor is used for detecting the air intake flow of the hydrogen fuel cell, and the system controller is electrically connected with the intake pressure sensor and the air flow sensor and used for adjusting the opening degree of the throttle valve and the suction power of the suction device in real time according to the air intake flow detected by the air flow sensor and the air intake pressure detected by the intake pressure sensor.
In some embodiments, the air flow sensor is provided in a communication pipe between the throttle valve and the air filtering device, and the intake pressure sensor is provided in a communication pipe between the exhaust port and the suction device.
In some embodiments, the device further comprises a power battery and a first DC/DC converter, wherein one end of the first DC/DC converter is electrically connected with the charging and discharging end of the power battery, and the other end of the first DC/DC converter is electrically connected with the suction device to supply power to the suction device.
In some embodiments, the system further comprises a second DC/DC converter, a storage battery and a heat sink, the other end of the first DC/DC converter is further electrically connected with the storage battery through the second DC/DC converter, and the storage battery supplies power to the heat sink.
In some embodiments, the first DC/DC converter is a bidirectional converter, and the output of the hydrogen fuel cell stack is electrically connected to the other end of the first DC/DC converter.
In some embodiments, the system controller is further configured with a detection module for fault detection prior to starting the hydrogen fuel cell system.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) The air supply device is improved into a suction type by a traditional air blowing mode, the suction device is arranged at an exhaust port of the hydrogen fuel cell stack, the damage to a proton exchange membrane of the hydrogen fuel cell due to gas pollution can be effectively avoided, the selection range of the equipment device is wider, and the cost is reduced.
(2) Based on the suction type air supply mode, when the front end of the air inlet of the hydrogen fuel cell stack is provided with the throttle valve, the negative pressure can be formed inside the hydrogen fuel cell stack by matching with the throttle valve, the evaporation of water in a pipeline is facilitated, and the purging efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of module electrical connections in one embodiment of a hydrogen fuel cell system of the present invention;
fig. 2 is a schematic structural diagram of a frame in an embodiment of a hydrogen fuel cell system according to the present invention.
Detailed Description
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.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The operating principle of the hydrogen fuel cell is as follows: 1) At one end of the hydrogen fuel cell stack, hydrogen gas reaches the anode through a pipe or a gas guide plate, and hydrogen molecules are dissociated into positively charged hydrogen ions (i.e., protons) and negatively charged electrons are released under the action of an anode catalyst. 2) The hydrogen ions pass through the electrolyte (proton exchange membrane) to the cathode; the electrons then reach the cathode through an external circuit. The electrons form a current in an external circuit, which through suitable connections can output electrical energy to a load. 3) At the other end of the cell, oxygen (or air) passes through a duct or gas guide to the cathode; under the action of cathode catalyst, oxygen reacts with hydrogen ions and electrons to produce water.
Referring to fig. 1-2, the present invention provides a hydrogen fuel cell system, which is intended to realize the supply of oxygen in the cathode of the hydrogen fuel cell, and comprises:
a hydrogen fuel cell stack 20 having an intake port for intake of air or oxygen and an exhaust port;
the suction device 30 is connected with the exhaust port, and is used for sucking the exhaust port to enable the air inlet to be fed; and
and a system controller 10 electrically connected to the hydrogen fuel cell stack 20 and the pumping device 30, wherein the system controller 10 is used for controlling the operation of the hydrogen fuel cell stack 20 and the pumping device 30.
In the present embodiment, air or oxygen circulates between the air inlet and the air outlet, and reacts with hydrogen ions and electrons after being catalyzed by the catalyst in the process of flowing through, the suction device 30 is disposed at the rear end of the air outlet of the hydrogen fuel cell stack 20 based on the air flowing direction, the suction device 30 and the air outlet can be connected through an air flowing pipeline, the suction device 30 is activated, and air enters from the air inlet of the hydrogen fuel cell stack 20 and is exhausted from the air outlet based on the suction effect of the suction device 30.
The hydrogen fuel cell system provided by the invention has the beneficial effect that the common installation position of the current air supply device is changed from the air inlet of the hydrogen fuel cell stack 20 to the air outlet of the hydrogen fuel cell stack 20. And the traditional gas blowing mode is improved into a suction mode, so that the air entering the hydrogen fuel cell stack 20 can not pass through the air supply device (the suction device 30 in the application), and further the gas pollution caused by the air supply device can be effectively avoided, and the damage to the proton exchange membrane of the hydrogen fuel cell stack 20 is avoided. Because the air supply device is disposed at the rear end of the exhaust port of the hydrogen fuel cell stack 20, the air supply device (the suction device 30) can be selected from a dedicated oil-free air compressor or an oil-free air blower, and is changed into an oil lubrication device with mature use technology and lower cost.
In some embodiments, the hydrogen fuel cell system further includes an air filtering device 40 for filtering air, and the air inlet of the hydrogen fuel cell stack is connected to the air filtering device 40.
In this embodiment, the air filter device 40 is used for filtering impurities in the air, wherein the impurities include dust, oil stain, suspended particles, and the like in the air. It is understood that in the hydrogen fuel cell stack 20, the cathode gas supply raw material may be air or oxygen, and when the supply raw material is pure oxygen, the air filter device 40 is not required; when the supply raw material is air, the air filter device 40 is disposed at the air inlet of the hydrogen fuel cell stack 20, the air filter device 40 is connected to the air inlet through an air flow pipe, and when the suction device 30 operates, the air is filtered by the air filter device 40 and enters the hydrogen fuel cell stack 20.
In some embodiments, the hydrogen fuel cell system further includes a throttle valve 50, and the throttle valve 50 is provided on a communication pipe between the air filtering device 40 and the air inlet of the hydrogen fuel cell stack 20, and is configured to control the amount of intake air flow of the air inlet.
In the present embodiment, the throttle valve 50 serves as a controllable valve that controls the intake of air into the hydrogen fuel cell stack 20, and is configured to control the amount of flow of intake air into the hydrogen fuel cell stack 20. The throttle 50 may be a manual device or an electric device, for example, when the throttle 50 is an electric device, the throttle 50 includes a throttle position sensor, the throttle 50 is electrically connected to the system controller 10, the system controller 10 determines an opening and closing angle of the throttle 50 according to feedback data of the throttle position sensor, and further adjusts an opening angle of the throttle 50 according to a required intake air flow, thereby adjusting the intake air flow.
In some embodiments, the system controller 10 controls the throttle valve 50 and the pumping device 30 to continue to operate after the shutdown of the hydrogen fuel cell stack 20 to purge the hydrogen fuel cell stack 20, and controls the throttle valve 50 and the pumping device 30 to stop operating when the purging is completed.
It is understood that water is generated during the operation of the hydrogen fuel cell stack 20, and a part of water remains in the hydrogen fuel cell stack 20 after the operation is stopped, and if the remaining water exists for a long time or a low temperature condition (below 0 ℃) is encountered, the hydrogen fuel cell stack 20 is damaged. At low temperatures, for example, water remaining in the flow channels and electrodes may become solid and expand in volume, compressing the flow channels to deform and damage the electrodes, thereby causing permanent damage to the hydrogen fuel cell stack 20 system.
The specific shutdown purging process comprises the following steps:
after the hydrogen fuel cell stack 20 stops operating, the system controller 10 continues to drive the suction device 30 to operate, the power of the suction device 30 is not changed, the opening and closing angle of the throttle valve 50 is suddenly reduced, the intake flow rate of the hydrogen fuel cell stack 20 becomes small, the intake pressure is suddenly reduced, the gas can dissolve more water vapor, and the residual moisture in the stack can be removed more thoroughly in a short time.
After the hydrogen fuel cell stack 20 stops operating, the voltage of the hydrogen fuel cell stack 20 can be reduced by the second DC/DC converter 730, and then the heat sink is driven by the low-voltage battery 740 to cool the hydrogen fuel cell stack 20.
In some embodiments, the hydrogen fuel cell system further includes an intake pressure sensor 310 and an air flow sensor 510, the intake pressure sensor 310 is configured to detect a magnitude of an intake air pressure of the hydrogen fuel cell stack 20, the air flow sensor 510 is configured to detect a magnitude of an intake air flow of the hydrogen fuel cell stack 20, and the system controller 10 is electrically connected to the intake pressure sensor 310 and the air flow sensor 510 and configured to adjust the opening degree of the throttle valve 50 and the suction power of the suction device 30 in real time according to the intake air flow detected by the air flow sensor 510 and the intake air pressure detected by the intake pressure sensor 310.
In this embodiment, the air flow sensor 510 is used for detecting the air flow entering the hydrogen fuel cell stack 20 in the air pipe in real time and feeding the air flow data back to the system controller 10, the intake pressure sensor 310 is used for detecting the intake pressure of the hydrogen fuel cell stack 20 in real time and feeding the intake pressure data back to the system controller 10 in real time, and the system controller 10 receives the air flow data and the intake pressure data and then determines and controls the opening and closing angle of the throttle valve 50 and the power of the air supply suction device 30.
It can be understood that, during the operation of the hydrogen fuel cell stack 20, the reaction between the introduced hydrogen and the introduced oxygen is mainly realized, and when the oxygen flows in the hydrogen fuel cell stack 20 along the airflow direction, the oxygen in the air is gradually consumed, and the oxygen concentration gradually decreases from the air inlet to the air outlet, so in order to ensure the sufficient supply of the oxygen, the phenomenon that the oxygen is exhausted at the end during the operation of the hydrogen fuel cell stack 20, the oxygen supply is insufficient to cause extremely high concentration polarization, and oxygen starvation occurs, which affects the reliability and the service life of the hydrogen fuel cell stack 20, therefore, it is necessary to ensure that the oxygen is introduced in an excessive amount, that is, to ensure the air flow entering the hydrogen fuel cell stack 20. In addition, the air flow rate is controlled within a proper range, the larger the air flow rate is, the better the air flow rate is, the smaller the air flow rate is, oxygen hunger and thirst are caused, the larger the air flow rate is, oxygen saturation is caused, on one hand, the air introduced into the hydrogen fuel cell stack 20 can carry away the moisture generated in the hydrogen-oxygen reaction, and if the air flow rate is too large, the excessive moisture can be carried away, and the water content of the proton membrane is reduced; on the other hand, when the air flow exceeds a threshold value at which time the fuel cell reaches maximum output power, continuing to increase the air flow does not improve the performance of the fuel cell. When the opening angle of the throttle 50 is fixed, the air flow rate is in positive correlation with the power of the suction device 30, and an increase in the air flow rate means an increase in the power of the suction device 30, and the parasitic power consumption of the system increases. Therefore, an optimal air flow rate, i.e. an optimal oxygen ratio, needs to be selected in consideration of obtaining the maximum output power, wherein the oxygen ratio is the ratio of the introduced oxygen flow rate to the actually consumed oxygen flow rate, and the ratio is generally in the interval of 1 to 1.5.
In summary, in order to ensure that the air flow reaches the preset value during the operation of the hydrogen fuel cell stack 20, the air flow sensor 510 and the intake pressure sensor 310 perform real-time data detection and feed back to the system controller 10, and the system controller 10 controls the opening and closing angle of the throttle 50 and the power of the suction device 30 to achieve the preset air flow.
In some embodiments, the air flow sensor 510 is provided in a communication pipe between the throttle valve 50 and the air filter device 40, and the intake pressure sensor 310 is provided in a communication pipe between the exhaust port and the suction device 30.
In the present embodiment, as one of the arrangements, the air flow sensor 510 is provided in a communication pipe between the throttle valve 50 and the air filter device 40, and the intake pressure sensor 310 is provided in a communication pipe between the exhaust port and the suction device 30. It should be noted that the air flow sensor 510 and the intake pressure sensor 310 may be disposed at other positions, for example, the air flow sensor 510 is disposed in the air cleaner, and the intake pressure sensor 310 is disposed in the suction device 30, which can detect data.
In some embodiments, the hydrogen fuel cell system further includes a power cell 710 and a first DC/DC converter 720, one end of the first DC/DC converter 720 is electrically connected to the charging and discharging end of the power cell 710, and the other end is electrically connected to the pumping device 30 to supply power to the pumping device 30.
In this embodiment, the power battery 710 stores electric energy to provide a power source for the suction device 30, and based on different working voltages required by different components, the first DC/DC converter 720 is provided, the power battery 710 outputs a high voltage to the first DC/DC converter 720, and the first DC/DC converter 720 converts a DC voltage value output by the power battery 710 into a DC voltage value for driving the suction device 30 to operate, so as to drive the suction device 30 to operate. Further, the power battery 710 may also be used as a power source for other components of the system, and further at least a first output branch and a second output branch are provided, wherein the first DC/DC converter 720 is connected to the suction device 30 through the first output branch, and is connected to other electric accessories through the second output branch.
In some embodiments, the hydrogen fuel cell system further includes a second DC/DC converter 730, a battery 740, and a heat sink 60, the other end of the first DC/DC converter 720 is further electrically connected to the battery 740 via the second DC/DC converter 730, and the battery 740 supplies power to the heat sink 60.
In this embodiment, the second power supply unit is connected to the second output branch of the first DC/DC converter 720, and the second DC/DC converter 730 may be a step-down converter, and is configured to convert the high voltage value of the first DC/DC output into a low voltage value, and drive the low-voltage electric accessory such as the heat sink 60 to operate through the battery 740 after the step-down.
The heat sink 60 is connected to the output end of the battery 740, and the heat sink 60 may be a water-cooling heat sink 60 and/or an air-cooling heat sink 60. The heat sink 60 is used for dissipating heat of the hydrogen fuel cell stack 20, and it can be understood that the hydrogen fuel cell stack 20 generates electric energy and water after electrochemical reaction, and generates a large amount of heat, and the electrochemical reaction of the hydrogen fuel cell stack 20 needs to diffuse the heat generated by the hydrogen fuel cell stack 20 in time, so as to avoid safety accidents caused by heat accumulation. The heat sink 60 is used as a low-voltage electrical accessory connected to the output end of the battery 740, and can dissipate heat from the hydrogen fuel cell stack 20 by a water-cooling heat dissipation method and/or an air-cooling heat dissipation method. Specifically, a temperature sensor is provided for detecting the temperature of the hydrogen fuel cell stack 20, and the system controller 10 controls the heat sink 60 to operate when the temperature is higher than a preset temperature value, so as to ensure the normal operation of the hydrogen fuel cell stack 20.
In some embodiments, the first DC/DC converter 720 is a bidirectional converter, and the output of the hydrogen fuel cell stack 20 is electrically connected to the other end of the first DC/DC converter 720.
In this embodiment, the first DC/DC converter 720 is a bidirectional converter, and has the characteristic of realizing bidirectional flow of direct current power, on one hand, the first DC/DC converter 720 can satisfy that the power battery 710 is used as a power source to drive the air suction device 30 to operate; on the other hand, the electric power generated by the operation of the hydrogen fuel cell stack 20 can also be transmitted to the power battery 710 through the first DC/DC converter 720 to charge the power battery 710.
In some embodiments, the system controller 10 is further configured with a detection module for performing system fault detection prior to starting the hydrogen fuel cell system.
In the present embodiment, the safe operation of the hydrogen fuel cell stack 20 is ensured by system failure detection. The method specifically comprises three-stage fault detection and two-stage fault detection, wherein the three-stage fault is generally a relatively serious fault, and when the three-stage fault is detected, the contactor can be disconnected through an emergency stop key; when a secondary fault is detected, the power can be reduced to shut down; and when the third-level fault and the second-level fault are not detected, the system carries out debugging self-check, and the hydrogen fuel cell system is started after no fault is confirmed.
In summary, based on the above hydrogen fuel cell system, a control method of the hydrogen fuel cell system includes:
1. carrying out system fault detection, and starting a main program when no fault exists;
2. when the hydrogen fuel cell stack 20 is in a standby state, starting the suction device, detecting air inlet flow data and air inlet pressure data in real time by the system controller, and adjusting the air inlet flow to reach a preset value by adjusting the opening and closing angle of the throttle valve and the power of the suction device;
3. sending a start-up command to the hydrogen fuel cell stack 20, and when the flow rate of the intake air reaches a preset value, operating the hydrogen fuel cell stack 20;
4. after the hydrogen fuel cell stack 20 is stopped, a delayed power-off program is started to purge residual moisture in the hydrogen fuel cell stack 20, and after purging is completed, the system controller completes a system shutdown step according to shutdown processing logic.
The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes, which are made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A hydrogen fuel cell system characterized by comprising:
a hydrogen fuel cell stack having an inlet port for inlet air or oxygen and an outlet port;
the suction device is connected with the exhaust port and is used for sucking the exhaust port to enable the air inlet to be fed; and
and the system controller is electrically connected with the hydrogen fuel cell stack and the suction device and is used for controlling the operation of the hydrogen fuel cell stack and the suction device.
2. The hydrogen fuel cell system according to claim 1, further comprising an air filter device for filtering air, the air intake port being connected to the air filter device.
3. The hydrogen fuel cell system according to claim 2, further comprising a throttle valve provided in a communication pipe between the air filter device and the intake port, for controlling the amount of intake air flow of the intake port.
4. The hydrogen fuel cell system according to claim 3, wherein the system controller controls the throttle valve and the suction device to continue operating to purge the hydrogen fuel cell stack after shutdown of the hydrogen fuel cell stack, and controls the throttle valve and the suction device to stop operating when purging is completed.
5. The hydrogen fuel cell system according to claim 3, further comprising an intake air pressure sensor for detecting an air intake pressure level of the hydrogen fuel cell and an air flow sensor for detecting an air intake flow level of the hydrogen fuel cell, wherein the system controller is electrically connected to the intake air pressure sensor and the air flow sensor for adjusting an opening degree of the throttle valve and a suction power of the suction device in real time in accordance with the air intake flow detected by the air flow sensor and the air intake pressure detected by the intake air pressure sensor.
6. The hydrogen fuel cell system according to claim 5, wherein the air flow sensor is provided on a communication pipe between the throttle valve and the air filtering device, and the intake pressure sensor is provided on a communication pipe between the exhaust port and the suction device.
7. The hydrogen fuel cell system according to claim 1, further comprising a power cell and a first DC/DC converter, wherein one end of the first DC/DC converter is electrically connected to a charging/discharging end of the power cell, and the other end of the first DC/DC converter is electrically connected to the suction device to supply power to the suction device.
8. The hydrogen fuel cell system according to claim 7, further comprising a second DC/DC converter, a storage battery, and a heat sink, the other end of the first DC/DC converter being further electrically connected to the storage battery via the second DC/DC converter, the storage battery supplying power to the heat sink.
9. The hydrogen fuel cell system according to claim 7, wherein the first DC/DC converter is a bidirectional converter, and the output terminal of the hydrogen fuel cell stack is electrically connected to the other terminal of the first DC/DC converter.
10. The hydrogen fuel cell system according to claim 1, wherein the system controller is further provided with a detection module for performing failure detection before starting the hydrogen fuel cell system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008542.4A CN115332564A (en) | 2022-08-22 | 2022-08-22 | Hydrogen fuel cell system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211008542.4A CN115332564A (en) | 2022-08-22 | 2022-08-22 | Hydrogen fuel cell system |
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| CN115332564A true CN115332564A (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211008542.4A Pending CN115332564A (en) | 2022-08-22 | 2022-08-22 | Hydrogen fuel cell system |
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- 2022-08-22 CN CN202211008542.4A patent/CN115332564A/en active Pending
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