CN113571740A - Online activation method and device for fuel cell system - Google Patents

Online activation method and device for fuel cell system Download PDF

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Publication number
CN113571740A
CN113571740A CN202111126230.9A CN202111126230A CN113571740A CN 113571740 A CN113571740 A CN 113571740A CN 202111126230 A CN202111126230 A CN 202111126230A CN 113571740 A CN113571740 A CN 113571740A
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fuel cell
cell system
time
humidity
ambient atmospheric
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CN113571740B (en
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赵兴旺
刘维
李飞强
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Beijing Sinohytec Co Ltd
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Beijing Sinohytec Co Ltd
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Priority to PCT/CN2022/112346 priority patent/WO2023045616A1/en
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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
    • 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
    • H01M8/04492—Humidity; Ambient humidity; Water content
    • 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
    • H01M8/04492—Humidity; Ambient humidity; Water content
    • H01M8/04529—Humidity; Ambient humidity; Water content of the electrolyte
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04544—Voltage
    • H01M8/04552—Voltage of the individual fuel cell
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04634—Other electric variables, e.g. resistance or impedance
    • H01M8/04641—Other electric variables, e.g. resistance or impedance of the individual fuel cell
    • 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
    • H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fuel Cell (AREA)
  • Automation & Control Theory (AREA)
  • Artificial Intelligence (AREA)
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  • Evolutionary Computation (AREA)
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Abstract

The invention provides an on-line activation method and an activation device of a fuel cell system, wherein the method comprises the steps of obtaining the starting time difference between the last time of shutdown of the fuel cell system and the current starting time; when the starting-up time difference is larger than the threshold starting-up time, acquiring the ambient atmospheric humidity of the fuel cell system in the starting-up time difference; comparing the ambient atmospheric humidity with a threshold humidity to obtain a first comparison result; acquiring first time when the ambient atmospheric humidity is greater than a threshold humidity; comparing the difference between the first time and the starting-up time to obtain a second comparison result; and determining whether to activate the fuel cell system according to the first comparison result and the second comparison result. According to the method provided by the embodiment of the invention, the fuel cell system is checked before the vehicle is started, whether the fuel cell system needs to be activated is judged, and the activation step is performed in a preposed manner, so that the service life of a fuel cell stack of the fuel cell system is prolonged, the service life attenuation of the fuel cell stack is slowed down, and the driving experience of a driver is improved.

Description

Online activation method and device for fuel cell system
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to an on-line activation method and an activation device for a fuel cell system.
Background
The fuel cell automobile is a new energy automobile with wide development prospect, and has the advantages of short hydrogenation time and long driving range. The fuel cell system generally comprises a fuel cell stack and a peripheral hydrogen, air, cooling and other component system, wherein the fuel cell stack comprises a proton exchange membrane, a catalyst layer, a gas diffusion layer, a bipolar plate and the like, wherein the proton exchange membrane needs to maintain good performance under a proper humidity state, and if the proton exchange membrane is dried too dry, proton conduction resistance is increased, and the performance is reduced. In the actual use process, the fuel cell automobile inevitably has a long standing process, so that the water vapor combined in the standing process of the proton exchange membrane is lost and tends to be in a dry state, and further the performance of the fuel cell system is reduced in the first starting operation process after the standing is finished, and even the normal operation can not be maintained.
The existing method usually needs to adopt an activation method after the first startup operation fails to recover the performance of the fuel cell system.
But because the activation operation is post-positioned, it can affect the driver's driving experience and also does not contribute to the life of the fuel cell system.
Disclosure of Invention
The invention provides an on-line activation method and an on-line activation device for a fuel cell system, which can solve the technical problems that the driving experience of a driver is influenced and the service life of the fuel cell system is not favorable due to the post-activation operation of a fuel cell.
The technical scheme provided by the invention is as follows:
in one aspect, a method for on-line activation of a fuel cell system is provided, the method comprising:
acquiring a starting-up time difference between the last time of shutting down the fuel cell system and the current starting-up time;
when the starting-up time difference is larger than the threshold starting-up time, acquiring the ambient atmospheric humidity of the fuel cell system in the starting-up time difference;
comparing the ambient atmospheric humidity with a threshold humidity to obtain a first comparison result;
obtaining a first time at which the ambient atmospheric humidity is greater than the threshold humidity;
comparing the first time with the starting time difference to obtain a second comparison result;
determining whether to activate the fuel cell system according to the first comparison result and the second comparison result.
In an alternative embodiment, the determining whether to activate the fuel cell system according to the first comparison result and the second comparison result includes: and when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the startup time difference, activating the fuel cell system.
In an alternative embodiment, the activating the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the start-up time difference comprises: determining activation of the fuel cell system according to the following equation: RH (relative humidity)0>RH, and T1<n×T0；
Wherein RH0Is the ambient atmospheric humidity, RH is the threshold humidity, T1Is the first time, T0And n is a proportionality coefficient and belongs to 0-1.
In an alternative embodiment, the obtaining the ambient atmospheric humidity of the fuel cell system within the startup time difference includes:
and acquiring the average ambient atmospheric humidity of the fuel cell system in the starting-up time difference, and taking the average ambient atmospheric humidity as the ambient atmospheric humidity.
In an optional embodiment, the method further comprises obtaining the activation result of the fuel cell system, and when the activation result is smaller than a threshold activation result, continuing to activate the fuel cell system until the activation result is greater than or equal to the threshold activation result.
In an optional embodiment, the method further includes obtaining humidity, internal resistance value or voltage of a proton exchange membrane of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than the threshold humidity, or the internal resistance value is smaller than a threshold resistance value, or the voltage is smaller than a threshold voltage.
In an optional embodiment, the method further includes acquiring a trend of ambient atmospheric humidity change of the fuel cell system within the startup time difference, acquiring a change time period corresponding to the trend of change, and activating the fuel cell system according to the change time period and the change trend within the first time.
In an alternative embodiment, the activating the fuel cell system according to the variation time period and the variation trend includes: and when the change trend is a descending trend in a change time period adjacent to the starting time, activating the fuel cell system.
In another aspect, there is provided an in-line activation apparatus for a fuel cell system, the apparatus including:
the first acquisition module is used for acquiring the starting time difference between the last time of shutdown of the fuel cell system and the current starting time;
the second acquisition module is used for acquiring the ambient atmospheric humidity of the fuel cell system within the starting time difference;
the first comparison module is used for comparing the ambient atmospheric humidity with a threshold humidity to obtain a first comparison result;
a third obtaining module, configured to obtain a first time when the ambient atmospheric humidity is greater than the threshold humidity;
the second comparison module is used for comparing the difference between the first time and the starting time to obtain a second comparison result;
and the activation module is used for determining whether to activate the fuel cell system according to the first comparison result and the second comparison result.
And the activation module is used for activating the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the starting-up time difference.
In an alternative embodiment, the activation module is configured to activate the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the start-up time difference.
The method provided by the embodiment of the invention at least has the following beneficial effects:
according to the method provided by the embodiment of the invention, the fuel cell system is checked before the vehicle is started, whether the fuel cell system needs to be activated is judged, and the activation step is performed in a preposed manner, so that the service life of a fuel cell stack of the fuel cell system is prolonged, the service life attenuation of the fuel cell stack is slowed down, and the driving experience of a driver is improved.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 shows a schematic flow diagram of an on-line activation method for a fuel cell system;
FIG. 2 shows a schematic diagram of a fuel cell system application;
FIG. 3 shows a schematic flow diagram of an on-line activation method for a fuel cell system;
fig. 4 shows a schematic diagram of an on-line activation device of a fuel cell system.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
In one aspect, an embodiment of the present invention provides an online activation method for a fuel cell system, referring to fig. 1 and fig. 2, the method includes:
s101, obtaining the starting time difference between the last time of shutting down the fuel cell system and the current starting time.
And S102, when the starting time difference is larger than the threshold starting time, acquiring the ambient atmospheric humidity of the fuel cell system in the starting time difference.
S103, comparing the ambient atmospheric humidity with the threshold humidity to obtain a first comparison result.
S104, acquiring the first time when the ambient atmospheric humidity is greater than the threshold humidity.
And S105, comparing the difference between the first time and the starting time to obtain a second comparison result.
And S106, determining whether to activate the fuel cell system or not according to the first comparison result and the second comparison result.
The method provided by the embodiment of the invention at least has the following beneficial effects:
the method provided by the embodiment of the invention can learn the idle time or the shutdown time of the vehicle by acquiring the starting time difference between the last shutdown time and the current startup time of the fuel cell system; when the starting time difference is larger than the threshold starting time, the fact that the proton exchange membrane of the fuel cell system is dry due to too long standing time of the fuel cell vehicle is indicated, the ambient atmospheric humidity of the fuel cell system in the vehicle stopping state can be known by acquiring the ambient atmospheric humidity of the fuel cell system in the starting time difference, and the influence condition of the ambient atmospheric humidity on the proton exchange membrane in the fuel cell system can be known by comparing the ambient atmospheric humidity with the threshold humidity; through obtaining the very first time that ambient atmospheric humidity is greater than threshold value humidity, can learn the time that fuel cell system stood under this ambient humidity, through comparing very first time and start time difference, can judge the time that fuel cell system stood in start time difference and under the condition that ambient humidity is greater than threshold value humidity, and then learn the humidity condition of proton exchange membrane among the fuel cell system, and then judge whether to activate fuel cell system. According to the method provided by the embodiment of the invention, the fuel cell system is checked before the vehicle is started, whether the fuel cell system needs to be activated is judged, and the activation step is performed in a preposed manner, so that the service life of a fuel cell stack of the fuel cell system is prolonged, the service life attenuation of the fuel cell stack is slowed down, and the driving experience of a driver is improved.
The methods provided by the embodiments of the present invention will be further explained and described by alternative embodiments.
S101, obtaining the starting time difference between the last time of shutting down the fuel cell system and the current starting time.
In the method provided by the embodiment of the invention, the fuel cell system operation data is acquired through the cloud server, as shown in fig. 2, the fuel cell vehicle is provided with the fuel cell system and a data acquisition unit (T-box), the fuel cell system transmits the real-time operation data of the fuel cell vehicle to the cloud server through the T-box by means of the CAN network and the T-box, and the cloud server CAN be networked to acquire various information of the fuel cell system, such as the starting time and the shutdown time of the fuel cell system, weather information, time information, geographical position information and the like.
It can be understood that the fuel cell vehicle may cause the water vapor combined in the proton exchange membrane to run away during a long-term standing process, and tend to be in a dry state, further causing the performance of the fuel cell system to be reduced during a first start-up operation after the standing process is finished, and even failing to maintain a normal operation. Therefore, the standing time of the fuel cell system can be judged according to the last shutdown time and the current startup time of the fuel cell system, namely the standing time of the fuel cell vehicle.
And S102, when the starting time difference is larger than the threshold starting time, acquiring the ambient atmospheric humidity of the fuel cell system in the starting time difference.
By ambient atmospheric humidity is meant the degree of humidity in the air, which is the degree to which the moisture content of the atmosphere is then saturated from the atmosphere, and is typically expressed as a percentage relative humidity. At a certain air temperature, the smaller the relative humidity in the atmosphere is, the faster the water vapor evaporates; conversely, the greater the relative humidity in the atmosphere, the slower the evaporation of the water vapor. Therefore, the humidity of the proton exchange membrane is affected by the ambient atmospheric humidity, and the humidity of the nephew exchange membrane is judged by acquiring the ambient atmospheric humidity.
When the starting time difference is larger than the threshold starting time, it is indicated that the proton exchange membrane of the fuel cell system may be dried due to too long standing time of the fuel cell vehicle, and there is a possibility of activating the proton exchange membrane, but since the fuel cell system is generally located in an external environment when located on the vehicle, the external environment humidity may also have a great influence on the performance of the fuel cell system, and in order to ensure the accuracy of the determination result, the embodiment of the present invention further obtains the ambient atmospheric humidity of the fuel cell system within the starting time difference, and then determines whether to activate the fuel cell system.
It should be noted that, in the embodiment of the present invention, the threshold startup time is not limited, and may be determined according to different performances of a fuel cell system mounted on a fuel cell vehicle.
S103, comparing the ambient atmospheric humidity with the threshold humidity to obtain a first comparison result.
It can be understood that the ambient humidity of the fuel cell system can be determined by comparing the ambient atmospheric humidity with the threshold humidity, and when the ambient humidity of the fuel cell vehicle is higher, the proton exchange membrane is not easy to dry, and when the ambient humidity of the fuel cell vehicle is lower, the proton exchange membrane is easy to dry. The ambient atmospheric humidity is therefore compared to a threshold humidity to obtain a first comparison result.
It is to be understood that the first comparison result includes the ambient atmospheric humidity being greater than a threshold humidity, or the ambient atmospheric humidity being less than the threshold humidity.
S104, acquiring the first time when the ambient atmospheric humidity is greater than the threshold humidity.
It can be understood that the ambient atmospheric humidity changes with time, the ambient atmospheric humidity at noon in a day is less than the ambient atmospheric humidity at night, the ambient atmospheric humidity at summer is greater than the ambient atmospheric humidity in winter, and the time length of stay of the fuel cell vehicle in the environment with greater ambient atmospheric humidity affects the humidity of the proton exchange membrane.
And S105, comparing the difference between the first time and the starting time to obtain a second comparison result.
As an example, the ambient atmospheric humidity of the fuel cell system is 50% and greater than the threshold humidity of 45%, and the time that the fuel cell system stays in the environment is 3 days, and the difference between the last shutdown time of the fuel cell system and the current startup time is 5 days, that is, the time that the fuel cell system stays still is 5 days, wherein 3 days are in the environment with lower humidity.
And S106, determining whether to activate the fuel cell system or not according to the first comparison result and the second comparison result.
In an alternative embodiment, determining whether to activate the fuel cell system based on the first comparison result and the second comparison result includes: and when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the startup time difference, activating the fuel cell system.
It can be understood that when the ambient atmospheric humidity is greater than the threshold humidity, which indicates that the fuel cell vehicle is always in an environment with higher humidity, the proton exchange membrane does not lose too much water, but when the first time is less than the startup time difference, which indicates that although the fuel cell vehicle is in an environment with higher humidity, the time in this environment is relatively short, which easily causes water loss of the proton exchange membrane, and at this time, the fuel cell system needs to be activated.
In an alternative embodiment, activating the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the boot time differential comprises: the activation of the fuel cell system is judged according to the following formula: RH (relative humidity)0>RH, and T1<n×T0；
Wherein RH0Ambient atmospheric humidity, RH is the threshold humidity, T1At a first time, T0And n is a proportionality coefficient and belongs to 0-1.
Further wherein RH0May be 50%; wherein T is1Humidity RH0>The sum of RH and n is a proportionality coefficient ranging from 0 to 1, for example 0.5, T0The difference between the starting time of the current starting and the starting time of the last shutdown.
As an example, the interval between the current startup and the last shutdown is 30 days, wherein the number of days when the atmospheric humidity is greater than 50% is 20 days, since 20 is greater than 0.5 × 30, it indicates that the fuel cell system is not started up for a long time, but the atmospheric humidity of the environment is high, and there is no concern about the problem of drying out of the proton exchange membrane.
As another example, if the interval between the current startup and the last shutdown is 30 days, and the number of days when the humidity of the atmospheric environment is greater than 50% is 10 days, then 10 is less than 0.5 × 30, which indicates that the fuel cell system is not started for a long time, but the atmospheric humidity of the environment is low, which easily causes the problem of water loss and drying of the proton exchange membrane.
The threshold humidity is not limited in the embodiments of the present invention, and may be determined according to the performance of the fuel cell system mounted on the fuel cell vehicle.
In an alternative embodiment, obtaining the ambient atmospheric humidity of the fuel cell system during the startup time difference comprises:
and acquiring the average ambient atmospheric humidity of the fuel cell system in the startup time difference, and taking the average ambient atmospheric humidity as the ambient atmospheric humidity.
It can be understood that when the fuel cell vehicle is left standing for too long, the ambient atmospheric humidity changes, so that the accuracy of the state judgment of the fuel cell system can be ensured by acquiring the average ambient atmospheric humidity of the fuel cell system in the startup time difference.
Further, in the embodiment of the present invention, a humidity sensor disposed in the fuel cell system may be used to obtain a sum of humidity values of the fuel cell system within the time difference, and obtain the average ambient atmospheric humidity according to the sum of humidity values and the start-up time difference.
In an alternative embodiment, the method further includes obtaining an activation result of the fuel cell system, and when the activation result is less than the threshold activation result, continuing to activate the fuel cell system until the activation result is greater than or equal to the threshold activation result.
It can be understood that after a certain period of activation, it is necessary to judge whether the activation reaches a standard value or not, or to restore the normal value of the proton exchange membrane of the fuel cell system. If the activation result is less than the threshold activation result, the activation is required to be continued until the activation result is greater than or equal to the threshold activation result.
In an optional embodiment, the method further includes obtaining humidity, internal resistance value or voltage of the proton exchange membrane of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than a threshold humidity, or the internal resistance value is less than a threshold resistance value, or the voltage is less than a threshold voltage.
Furthermore, the humidity of the nephew-exchange membrane after activation is obtained through the cloud server, when the humidity of the nephew-exchange membrane after activation is greater than the threshold humidity, the fuel cell system recovers to be normal, activation can be stopped, or the internal resistance value of the nephew-exchange membrane after activation is obtained through the cloud server, if the internal resistance value is smaller than the threshold resistance value, the proton exchange membrane can work normally, activation can be stopped, or the voltage of the nephew-exchange membrane after activation is obtained through the cloud server, when the voltage is smaller than the threshold voltage, the proton exchange membrane recovers to be normal, and activation is stopped at this moment.
In an alternative embodiment, since the fuel cell system still time exceeds the threshold startup time and the humidity of the atmosphere is low for most days, which indicates that the proton exchange membrane of the fuel cell system is in a dry state, the proton exchange membrane of the fuel cell system can be wetted by changing the operating conditions of the operating point during normal operation, such as reducing the operating temperature of the fuel cell system, and/or reducing the air flow rate for operating the fuel cell system, and/or operating the fuel cell system at or above the rated power.
Further, the cloud server may send the instruction for reducing the operating temperature of the fuel cell system, and/or reducing the air flow rate for operating the fuel cell system, and/or operating the fuel cell system at the rated power or above the rated power to the fuel cell system controller, and the fuel cell system controller may control the fuel cell system to change the state of the proton exchange membrane.
Furthermore, in the embodiment of the invention, the humidity, the internal resistance value or the voltage of the proton exchange membrane of the fuel cell system can be obtained through the fuel cell system controller, and the numerical values are transmitted to the cloud server.
In an optional embodiment, the method further includes acquiring a variation trend of ambient atmospheric humidity of the fuel cell system within the startup time difference, acquiring a variation time period corresponding to the variation trend, and activating the fuel cell system according to the variation time period and the variation trend.
It will be appreciated that the ambient atmospheric humidity at which the fuel cell system is located may vary over time, for example, as the humidity increases during the day, decreases during the night, or as the ambient atmospheric temperature changes. The change trend of the ambient atmospheric humidity comprises an ascending trend and a descending trend, and the ascending trend and the descending trend correspond to a certain time period in the startup time difference.
In an alternative embodiment, activating the fuel cell system based on the time period of change and the trend of change over the first time includes: and when the change trend is a descending trend in the change time period adjacent to the starting-up time, activating the fuel cell system.
Furthermore, in the startup time difference, the ambient atmospheric humidity rises for a period of time first and then falls for a period of time, and the ambient atmospheric humidity in the period of time before startup is always reduced, which indicates that although the ambient atmospheric humidity rises in the previous period of time, the ambient atmospheric humidity in the period of time near startup is reduced, and when the rate of reduction of the ambient humidity is high, the proton exchange membrane loses moisture quickly, and at this time, the proton exchange membrane can be activated in order to ensure the normal operation of the fuel cell vehicle.
In an optional embodiment, the rising and falling rates of the ambient atmospheric humidity within the startup time difference can be obtained, the drying time of the proton exchange membrane of the fuel cell system can be judged according to the rate, if the ambient atmospheric humidity continuously falls at the rate, the drying of the proton exchange membrane can be realized by water loss and drying within a short time, and at the moment, the fuel cell system can be activated, the use efficiency of the fuel cell system is improved, and the problems that a fuel cell vehicle breaks down in the use process and the like are avoided.
In an optional embodiment, the method provided in the embodiment of the present invention further includes powering on the fuel cell system, and transmitting data to the cloud server in real time, where powering on refers to connection of low voltage power supplies such as 24V or 12V, and provides power supplies for the T-box and the fuel cell system controller to operate, and may also include various high voltage power supplies; the data here includes, but is not limited to, a start command and a command for the fuel cell engine.
In an alternative embodiment, the fuel cell system is powered on and enters a self-test, which generally refers to checking the status and faults of various sensors and actuators.
Referring further to fig. 3, the method provided by the embodiment of the invention is further explained and illustrated by fig. 3.
As shown in fig. 3, after the method provided by the embodiment of the present invention starts, the fuel cell system is powered on, data is transmitted to the cloud server in real time, the fuel cell system is powered on and enters self-test, and the cloud server calculates the local time after the cloud server obtains the last power-off time and the current power-on time of the fuel cell systemThe difference T between the starting time and the last time0Cloud server query on-time difference T0Atmospheric humidity RH of environment in which internal fuel cell system is located0If the difference of the starting-up time T0> T (threshold time), if the boot time difference is T0If T (threshold time), the fuel cell system enters a normal operation state without activation, and if the starting time difference T is less than T0If the humidity is more than T (threshold time), the humidity RH of the ambient atmosphere is judged0Relation to the threshold humidity RH when RH0Time T > RH1Less than nT0，Namely T1<n×T0And the cloud server sends an activation instruction to the fuel cell system controller, the activation process is started, whether the activation result meets a standard value or not is judged, if yes, the activation is finished, and the fuel cell system enters a normal operation state. The normal operation state here refers to outputting power under normal operating point operating conditions to drive the fuel cell vehicle to operate.
In another aspect, an embodiment of the present invention further provides an on-line activation device for a fuel cell system, referring to fig. 4, the device includes:
a first obtaining module 401, configured to obtain a startup time difference between a last shutdown time and a current startup time of the fuel cell system;
a second obtaining module 402, configured to obtain an ambient atmospheric humidity of the fuel cell system within a startup time difference;
a first comparing module 403, configured to compare ambient atmospheric humidity with a threshold humidity, so as to obtain a first comparison result;
a third obtaining module 404, configured to obtain a first time when the ambient atmospheric humidity is greater than the threshold humidity;
a second comparing module 405, configured to compare the difference between the first time and the boot time to obtain a second comparison result;
an activation module 406 determines whether to activate the fuel cell system based on the first comparison and the second comparison.
In an alternative embodiment, the activation module 406 is configured to activate the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the boot time difference.
In an alternative embodiment, the activation module 406 is configured to determine to activate the fuel cell system according to the following equation: RH (relative humidity)0>RH, and T1<n×T0；
Wherein RH0Ambient atmospheric humidity, RH is the threshold humidity, T1At a first time, T0And n is a proportionality coefficient and belongs to 0-1.
In an alternative embodiment, the second obtaining module 402 is configured to obtain an average ambient atmospheric humidity of the fuel cell system during the startup time difference, and use the average ambient atmospheric humidity as the ambient atmospheric humidity.
In an optional embodiment, the apparatus further comprises a fourth obtaining module, configured to obtain an activation result of the fuel cell system, and when the activation result is smaller than a threshold activation result, continue to activate the fuel cell system until the activation result is greater than or equal to the threshold activation result.
In an optional embodiment, the apparatus further includes a fifth obtaining module, configured to obtain humidity, internal resistance value, or voltage of the proton exchange membrane of the fuel cell system, and stop activation when the humidity of the proton exchange membrane is greater than a threshold humidity, or the internal resistance value is smaller than a threshold resistance value, or the voltage is smaller than a threshold voltage.
In an optional embodiment, the apparatus further includes a sixth obtaining module, configured to obtain a trend of ambient atmospheric humidity change within the startup time difference of the fuel cell system, obtain a change time period corresponding to the trend of change, and activate the fuel cell system according to the change time period and the change trend within the first time.
In an alternative embodiment, the activation module 406 is configured to activate the fuel cell system when the trend of change is a downward trend during a change time period adjacent to the boot time.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A method of on-line activation of a fuel cell system, the method comprising:
acquiring a starting-up time difference between the last time of shutting down the fuel cell system and the current starting-up time;
when the starting-up time difference is larger than the threshold starting-up time, acquiring the ambient atmospheric humidity of the fuel cell system in the starting-up time difference;
comparing the ambient atmospheric humidity with a threshold humidity to obtain a first comparison result;
obtaining a first time at which the ambient atmospheric humidity is greater than the threshold humidity;
comparing the first time with the starting time difference to obtain a second comparison result;
determining whether to activate the fuel cell system according to the first comparison result and the second comparison result.
2. The method according to claim 1, wherein the determining whether to activate the fuel cell system according to the first comparison result and the second comparison result includes: and when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the startup time difference, activating the fuel cell system.
3. The method of claim 2, wherein activating the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than a start-up time difference comprises: determining activation of the fuel cell system according to the following equation: RH (relative humidity)0>RH, and T1<n×T0；
Wherein RH0Is the ambient atmospheric humidity, RH is the threshold humidity, T1Is the first time, T0And n is a proportionality coefficient and belongs to 0-1.
4. The method of claim 1, wherein said obtaining the ambient atmospheric humidity of the fuel cell system during the start-up time difference comprises:
and acquiring the average ambient atmospheric humidity of the fuel cell system in the starting-up time difference, and taking the average ambient atmospheric humidity as the ambient atmospheric humidity.
5. The method according to claim 1, further comprising obtaining the activation result of the fuel cell system, and when the activation result is less than a threshold activation result, continuing to activate the fuel cell system until the activation result is equal to or greater than the threshold activation result.
6. The method of claim 5, further comprising obtaining a humidity, an internal resistance value, or a voltage of the proton exchange membrane of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than the threshold humidity, or the internal resistance value is less than a threshold resistance value, or the voltage is less than a threshold voltage.
7. The method according to claim 1, further comprising obtaining a trend of ambient atmospheric humidity of the fuel cell system within the startup time difference, obtaining a variation time period corresponding to the trend of ambient atmospheric humidity, and activating the fuel cell system according to the variation time period and the trend of ambient atmospheric humidity within the first time.
8. The method according to claim 7, wherein the activating the fuel cell system according to the variation time period and the variation tendency includes: and when the change trend is a descending trend in a change time period adjacent to the starting time, activating the fuel cell system.
9. An in-line activation apparatus for a fuel cell system, the apparatus comprising:
the first acquisition module is used for acquiring the starting time difference between the last time of shutdown of the fuel cell system and the current starting time;
the second acquisition module is used for acquiring the ambient atmospheric humidity of the fuel cell system within the starting time difference;
the first comparison module is used for comparing the ambient atmospheric humidity with a threshold humidity to obtain a first comparison result;
a third obtaining module, configured to obtain a first time when the ambient atmospheric humidity is greater than the threshold humidity;
the second comparison module is used for comparing the difference between the first time and the starting time to obtain a second comparison result;
and the activation module is used for determining whether to activate the fuel cell system according to the first comparison result and the second comparison result.
10. The apparatus of claim 9, wherein the activation module is configured to activate the fuel cell system when the ambient atmospheric humidity is greater than the threshold humidity and the first time is less than the boot-up time difference.
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