AU2022350248A1 - Online activation method and activation device for fuel cell system - Google Patents
Online activation method and activation device for fuel cell system Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 206
- 230000004913 activation Effects 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000008859 change Effects 0.000 claims description 43
- 239000012528 membrane Substances 0.000 claims description 40
- 230000003213 activating effect Effects 0.000 claims description 20
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000001994 activation Methods 0.000 description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000001035 drying Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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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
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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
- H01M8/04492—Humidity; Ambient humidity; Water content
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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
- H01M8/04492—Humidity; Ambient humidity; Water content
- H01M8/04529—Humidity; Ambient humidity; Water content of the electrolyte
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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
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
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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
- H01M8/04537—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
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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
- H01M8/04992—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
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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
- H01M8/10—Fuel cells with solid electrolytes
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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
- 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
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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 present invention provides an online activation method and an activation device for a fuel cell system. The method comprises: acquiring a power-on time difference between the last power-off time and the current power-on time of a fuel cell system; if the power-on time difference is greater than a power-on time threshold, acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference; comparing the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result; acquiring a first time when the ambient atmosphere humidity is greater than the humidity threshold; comparing the first time with the power-on time difference to obtain a second comparison result; and determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system. According to the method provided in embodiments of the present invention, the fuel cell system is examined before a vehicle is started, it is determined whether the fuel cell system needs to be activated, and the activation step is pre-set, so that the service life of a fuel cell system stack is prolonged, the life attenuation of the stack is slowed down, and the driving experience of the driver is improved.
Description
Online Activation Method and Activation Device for Fuel Cell System
Technical Field
The present invention belongs to the technical field of cells, and in particular to an online activation method and activation device for a fuel cell system.
Background
A fuel cell vehicle is a new energy vehicle with a broad development prospect, which has many advantages such as short hydrogenation time and long driving range. A fuel cell system usually includes a fuel cell stack and peripheral hydrogen component system, air component system, cooling component system and other component systems. The fuel cell stack includes a proton exchange membrane, a catalyst layer, a gas diffusion layer, a bipolar plate and the like. The proton exchange membrane needs to maintain good performance in a suitable humidity state, and if it is too dry, the proton conductivity impedance will increase, and the performance will reduce. During actual use, the fuel cell vehicle inevitably experiences a long-time standing process, which causes the loss of water vapor bonded to the proton exchange membrane in the standing process, resulting in a drying state, and further leading to the performance degradation of the fuel cell system during the first power-on operation after the standing ends, or even being unable to maintain normal operation.
Existing methods usually need to adopt an activation method to restore the performance of the fuel cell system after the first power-on operation fails.
However, the post-activation operation affects the driving experience of a driver and is also detrimental to the service life of the fuel cell system.
Summary
The present invention provides an online activation method and activation device for a fuel cell system, which may solve the technical problem that the post-activation operation affects the driving experience of a driver and is also detrimental to the service life of the fuel cell system.
The technical solutions provided by the present invention are as follows.
In one aspect, an online activation method for a fuel cell system is provided. The method includes:
acquiring a power-on time difference between a last power-off time and a current power-on
I time of the fuel cell system; when the power-on time difference is greater than a power-on time threshold, acquiring an ambient atmosphere humidity of the fuel cell system within the power-on time difference; comparing the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result; acquiring a first time when the ambient atmosphere humidity is greater than the humidity threshold; comparing the first time with the power-on time difference to obtain a second comparison result; determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system.
In some embodiments, determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system includes: activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
In some embodiments, activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference includes: determining whether to activate the fuel cell system according to a following formula: RHO>RH,and Tl<nxTO;
wherein RHO is the ambient atmosphere humidity, RH is the humidity threshold, T1 is the first
time, TO is the power-on time difference, n is a proportional coefficient, and n E 0 to 1.
In some embodiments, acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference includes:
acquiring an average ambient atmosphere humidity of the fuel cell system within the power-on time difference, and taking the average ambient atmosphere humidity as the ambient atmosphere humidity.
In some embodiments, the method further includes: acquiring an activation result of the fuel cell system, and continuing, when the activation result is less than an activation result threshold, activating the fuel cell system until the activation result is greater than or equal to the activation result threshold.
In some embodiments, the method further includes: acquiring an humidity of a proton exchange membrane of the fuel cell system, an internal resistance value of the fuel cell system, or a voltage of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than the humidity threshold, or the internal resistance value is less than a resistance value threshold, or the voltage is less than a voltage threshold.
In some embodiments, the method further includes: acquiring a change trend of the ambient atmosphere humidity of the fuel cell system within the power-on time difference, acquiring a change time period corresponding to the change trend, and activating the fuel cell system according to the change time period and the change trend within the first time.
In some embodiment, activating the fuel cell system according to the change time period and the change trend includes: activating the fuel cell system when the change trend is a falling trend within the change time period adjacent to the power-on time.
In another aspect, an online activation device for a fuel cell system is provided. The device includes:
a first acquisition module, configured to acquire a power-on time difference between a last power-off time and a current power-on time of the fuel cell system;
a second acquisition module, configured to acquire an ambient atmosphere humidity of the fuel cell system within the power-on time difference;
a first comparison module, configured to compare the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result;
a third acquisition module, configured to acquire a first time when the ambient atmosphere humidity is greater than the humidity threshold;
a second comparison module, configured to compare the first time with the power-on time difference to obtain a second comparison result;
an activation module, configured to determine, according to the first comparison result and the second comparison result, whether to activate the fuel cell system.
The activation module is configured to activate the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
In some embodiments, the activation module is configured to activate the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
The method provided in the embodiments of the present invention has at least the following beneficial effects.
According to the method provided in embodiments of the present invention, the fuel cell system is examined before the vehicle is started to determine whether the fuel cell system needs to be activated, and the activation step is pre-set, so that the service life of a fuel cell system stack is prolonged, the life attenuation of the stack is slowed down, and the driving experience of the driver is improved.
Brief Description of the Drawings
The exemplary embodiments of the present invention will be described below in detail in conjunction with the drawings, and the above and other purposes, features and advantages of the present invention will become more apparent. The same reference signs generally represent the same parts in the exemplary embodiments of the present invention.
Fig. 1 shows a schematic flowchart of an online activation method for a fuel cell system.
Fig. 2 shows a schematic diagram of application of a fuel cell system.
Fig. 3 shows a schematic flowchart of an online activation method for a fuel cell system.
Fig. 4 shows a schematic structural diagram of an online activation device for a fuel cell system.
Detailed Description of the Embodiments
Embodiments of the present invention will be described in more detail below with reference to the drawings. Although the embodiments of the present invention are shown in the drawings, it is to be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided, so that the present invention is more thoroughly and comprehensively understood, and can fully convey the scope of the present invention to those skilled in the art.
The term "include" and variations thereof used herein indicate open inclusion, that is, "including, but not limited to". Unless otherwise stated, the term "or" indicates "and/or". The term "based on" indicates "at least partially based on". The terms "one exemplary embodiment" and "one
A embodiment" indicate "at least one exemplary embodiment". The term "another embodiment" indicates "at least one another embodiment". The terms "first", "second" and the like may refer to different or identical objects. Other explicit and implicit definitions may also be included below.
In one aspect, the embodiments of the present invention provide an online activation method for a fuel cell system, referring to Fig. 1 and Fig. 2, the method includes:
at S101, acquiring a power-on time difference between a last power-off time and a current power-on time of the fuel cell system;
at S102, when the power-on time difference is greater than a power-on time threshold, acquiring an ambient atmosphere humidity of the fuel cell system within the power-on time difference;
at S103, comparing the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result;
at S104, acquiring a first time when the ambient atmosphere humidity is greater than the humidity threshold;
at S105, comparing the first time with the power-on time difference to obtain a second comparison result;
at S106, determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system.
The method provided in the embodiments of the present invention has at least the following beneficial effects.
According to the method provided in the embodiments of the present invention, by acquiring the power-on time difference between the last power-off time and the current power-on time of the fuel cell system, the idle or power-off time of a vehicle may be known. When the power-on time difference is greater than the power-on time threshold, it indicates that the standing time of the fuel cell vehicle is too long, which may cause the drying of a proton exchange membrane of the fuel cell system. By acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference, the ambient atmosphere humidity of the fuel cell system in a vehicle power-off state may be known, and compared with the humidity threshold, the influence condition of the ambient atmosphere humidity on the proton exchange membrane of the fuel cell system may be known. By acquiring the first time when the ambient atmosphere humidity is greater than the humidity threshold, the standing time of the fuel cell system at the ambient humidity may be known. By comparing the first time with the power-on time difference, the standing time of the fuel cell system within the power-on time difference and under the condition that the ambient humidity is greater than the humidity threshold may be determined, thereby knowing the humidity condition of the proton exchange membrane of the fuel cell system and further determining whether to activate the fuel cell system. According to the method provided in the embodiments of the present invention, the fuel cell system is examined before the vehicle is started to determine whether the fuel cell system needs to be activated, and the activation step is pre-set, so that the service life of a fuel cell system stack is prolonged, the life attenuation of the stack is slowed down, and the driving experience of the driver is improved.
The method provided in the embodiments of the present invention will be further explained and described below through some embodiments.
At S101, acquiring the power-on time difference between the last power-off time and the current power-on time of the fuel cell system.
According to the method provided in the embodiments of the present invention, the operation data of the fuel cell system is acquired by a cloud server, as shown in Fig. 2, the fuel cell vehicle carries the fuel cell system and a data collector (T-box). The fuel cell system sends the real-time operation data of the fuel cell vehicle to the cloud server by a Controller Area Network (CAN) and the T-box, and the cloud server may be networked to acquire various information of the fuel cell system, such as the power-on time and the power-off time of the fuel cell system, weather information, time information, geographical location information and the like.
It is understandable that the long-time standing process of the fuel cell vehicle causes the loss of water vapor bonded to the proton exchange membrane, resulting in a drying state, and further leading to the performance degradation of the fuel cell system during the first power-on operation after the standing ends, or even being unable to maintain normal operation. Therefore, the standing time of the fuel cell system may be determined according to the last power-off time and the current power-on time of the fuel cell system, that is, the standing time of the fuel cell vehicle.
At S102, when the power-on time difference is greater than the power-on time threshold, acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference.
The ambient atmosphere humidity refers to the degree of moisture in the air, which indicates the ratio of the water vapor content in the atmosphere at that time to the water vapor content when the atmosphere is saturated, and the degree of the ambient atmosphere humidity is generally indicated by the relative humidity percentage. At a certain temperature, the smaller the relative humidity of the atmosphere, the faster the evaporation of water vapor. On the contrary, the greater the relative humidity of the atmosphere, the slower the evaporation of water vapor. Therefore, the ambient atmosphere humidity affects the humidity of the proton exchange membrane. In the embodiments of the present invention, the humidity of the proton exchange membrane is determined by acquiring the ambient atmosphere humidity.
When the power-on time difference is greater than the power-on time threshold, it indicates that the standing time of the fuel cell vehicle is too long, which may cause the drying of the proton exchange membrane of the fuel cell system, and it is possible to activate the fuel cell system. However, since the fuel cell system is generally in an external environment when being located on the vehicle, the humidity of the external environment also has a great impact on the performance of the fuel cell system. In order to ensure the accuracy of the determination result, the embodiments of the present invention further determine whether to activate the fuel cell system by acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference.
It is to be noted that the power-on time threshold is not limited in the embodiments of the present invention, and may be specifically determined according to the different performance of the fuel cell system carried by the fuel cell vehicle.
At S103, comparing the ambient atmosphere humidity with the humidity threshold to obtain the first comparison result.
It is understandable that the ambient humidity of the fuel cell system may be determined by comparing the ambient atmosphere humidity with the humidity threshold. When the atmosphere humidity environment where the fuel cell vehicle is located is relatively large, the proton exchange membrane is not prone to drying, and when the atmosphere humidity environment where the fuel cell vehicle is located is relatively small, the proton exchange membrane is prone to drying. Therefore, the ambient atmosphere humidity is compared with the humidity threshold to obtain the first comparison result.
It is understandable that the first comparison result includes that the ambient atmosphere humidity is greater than the humidity threshold, or the ambient atmosphere humidity is less than the humidity threshold.
At S104, acquiring the first time when the ambient atmosphere humidity is greater than the humidity threshold.
It is understandable that the ambient atmosphere humidity changes with time, the ambient atmosphere humidity at noon may be less than the ambient atmosphere humidity at night in one day, the ambient atmosphere humidity in summer is greater than the ambient atmosphere humidity in winter, and the time when the fuel cell vehicle stays in an environment with relatively large ambient atmosphere humidity may affect the humidity of the proton exchange membrane. Therefore, in the embodiments of the present invention, by acquiring the first time when the ambient atmosphere humidity is greater than the humidity threshold, the standing time of the fuel cell system in an environment with humidity greater than the humidity threshold may be determined, and then whether the proton exchange membrane is dry may be determined.
At S105, comparing the first time with the power-on time difference to obtain the second comparison result.
As an example, the ambient atmosphere humidity of the fuel cell system is 50%, which is greater than the humidity threshold of 45%, and the fuel cell system stays in this environment for 3 days. The power-on time difference between the last power-off time and the current power-on time of the fuel cell system is 5 days, that is, the standing time of the fuel cell system is 5 days, 3 days of which are in an environment with relatively low humidity.
At S106, determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system.
In some embodiments, determining, according to first comparison result and second comparison result, whether to activate the fuel cell system includes: activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
It is understandable that when the ambient atmosphere humidity is greater than the humidity threshold, it indicates that the fuel cell vehicle is always in an environment with relatively high humidity, and the proton exchange membrane will not lose too much water. However, when the first time is less than the power-on time difference, it indicates that although the fuel cell vehicle is in the environment with relatively high humidity, the time in this environment is relatively short, which easily causes the water loss of the proton exchange membrane, and at this time, the fuel cell system needs to be activated.
In some embodiments, activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference includes: determining whether to activate the fuel cell system according to a following formula: RHO>RH,and T1<nxTO.
Wherein RHO is the ambient atmosphere humidity, RH is the humidity threshold, T1 is the first
time, TO is the power-on time difference, n is a proportional coefficient, and n E0 to 1.
Further, RHO may be 50%, wherein T1 is the sum of time when the humidity RHO is greater than RH, n is the proportional coefficient, which ranges from 0 to 1, for example, may be 0.5, and TO is the power-on time difference between the current power-on and the last power-off.
As an example, the interval between the current power-on and the last power-off is 30 days, and the number of days when the ambient atmosphere humidity is greater than 50% is 20 days. Since 20>0.5x30, it indicates that the fuel cell system is not powered on for a long time, but the ambient atmosphere humidity is relatively high, and the problem of the drying of the proton exchange membrane does not need to be worried about.
As another example, the interval between the current power-on and the last power-off is 30 days, and the number of days when the ambient atmosphere humidity is greater than 50% is 10 days. Since 10<0.5x30, it indicates that the fuel cell system is not powered on for a long time, and the ambient atmosphere humidity is relatively low, which easily causes the water loss and drying of the proton exchange membrane.
It is to be noted that the humidity threshold is not limited in the embodiments of the present invention, and may be specifically determined according to the different performance of the fuel cell system carried by the fuel cell vehicle.
In some embodiments, acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference includes:
acquiring an average ambient atmosphere humidity of the fuel cell system within the power-on time difference, and taking the average ambient atmosphere humidity as the ambient atmosphere humidity.
It is understandable that when the standing time of the fuel cell vehicle is too long, the ambient atmosphere humidity may change, so that the accuracy of determining the state of the fuel cell system may be guaranteed by acquiring the average ambient atmosphere humidity of the fuel cell system within the power-on time difference.
Further, in the embodiments of the present invention, the sum of humidity values of the fuel cell system within the time difference may be acquired by a humidity sensor arranged in the fuel cell system, and the average ambient atmosphere humidity is obtained by the sum of the humidity values and the power-on time difference.
In some embodiments, the method further includes: acquiring an activation result of the fuel cell system, and continuing, when the activation result is less than an activation result threshold, activating the fuel cell system until the activation result is greater than or equal to the activation result threshold.
It is understandable that after a certain period of activation, it is necessary to determine whether the activation reaches a standard value or enable the proton exchange membrane of the fuel cell system to restore a normal value. If the activation result is less than the activation result threshold, it is necessary to continue activating the fuel cell system until the activation result is greater than or equal to the activation result threshold.
In some embodiments, the method further includes: acquiring a humidity of the proton exchange membrane of the fuel cell system, an internal resistance value of the fuel cell system, or a voltage of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than the humidity threshold, or the internal resistance value is less than a resistance value threshold, or the voltage is less than a voltage threshold.
Further, the humidity of the proton exchange membrane after activation is acquired by the cloud server. When the humidity of the proton exchange membrane after activation is greater than the humidity threshold, it indicates that the fuel cell system returns to normal and the activation may be stopped, or the internal resistance value of the proton exchange membrane after activation is acquired by the cloud server, if the internal resistance value is less than the resistance value threshold, it indicates that the proton exchange membrane may work normally, and the activation may be stopped, or the voltage of the proton exchange membrane after activation is acquired by the cloud server, when the voltage is less than the voltage threshold, it indicates that the proton exchange membrane returns to normal, and the activation is stopped at this time.
In some embodiments, when the standing time of the fuel cell system exceeds the power-on time threshold, and the ambient atmosphere humidity is relatively low on most days, it indicates that the proton exchange membrane of the fuel cell system is in a drying state, and at this time, the operating conditions of operating points during normal operation may be changed, for example, reducing the operating temperature of the fuel cell system, and/or reducing the air flow rate at which the fuel cell system operates, and/or enabling the fuel cell system to operate at or above the rated power for achieving the purpose of wetting the proton exchange membrane of the fuel cell system.
Further, instructions for reducing the operating temperature of the fuel cell system, and/or reducing the air flow rate at which the fuel cell system operates, and/or enabling the fuel cell system to operate at or above the rated power may be sent to a fuel cell system controller by the cloud
in server, and the fuel cell system controller controls the fuel cell system to change the state of the proton exchange membrane.
Further, in the embodiments of the present invention, the humidity of the proton exchange membrane of the fuel cell system, the internal resistance value of the fuel cell system or the voltage of the fuel cell system may be acquired by the fuel cell system controller, and the above numerical values are transmitted to the cloud server.
In some embodiments, the method further includes: acquiring a change trend of the ambient atmosphere humidity of the fuel cell system within the power-on time difference, acquiring a change time period corresponding to the change trend, and activating the fuel cell system according to the change time period and the change trend.
It is understandable that the ambient atmosphere humidity of the fuel cell system may change with time, for example, the humidity rises in the daytime and falls at night, or the humidity changes with the change of the ambient atmosphere temperature. The change trend of the ambient atmosphere humidity includes a rising trend and a falling trend, and the rising trend and falling trend within the power-on time difference correspond to a certain time periods. In the embodiments of the present invention, the fuel cell system is activated according to the change time period and the change trend by acquiring the change time period corresponding to the change trend.
In some embodiments, activating the fuel cell system according to the change time period and the change trend within the first time includes: activating the fuel cell system when the change trend is the falling trend within the change time period adjacent to the power-on time.
Further, the ambient atmosphere humidity first rises for a period of time, then falls for a period of time within the power-on time difference, and the ambient atmosphere humidity always falls during the period before the power-on, indicating that although the ambient atmosphere humidity rises in the previous period, the ambient atmosphere humidity falls during the period near the power-on. When a falling rate of the ambient humidity is relatively large, it indicates that the proton exchange membrane may soon lose water, and at this time, in order to ensure the normal operation of the fuel cell vehicle, the fuel cell vehicle may be activated.
In some embodiments, the drying time of the proton exchange membrane of the fuel cell system may be determined by acquiring a rising rate and a falling rate of the ambient atmosphere humidity within the power-on time difference, and according to the rates. If the ambient atmosphere humidity continues to fall at the rate, the proton exchange membrane may lose water and dry in a short time. At this time, the fuel cell system may be activated to improve the use efficiency of the fuel cell system and avoid the problems of fault and the like of the fuel cell vehicle during use.
In some embodiments, the method provided in the embodiments of the present invention further includes: powering on the fuel cell system to transmit data to the cloud server in real time. It is to be noted that the power-on here refers to a connection of a low voltage power supply such as 24V or 12V, which provides the power supply for the T-box and the fuel cell system controller to operate, and may also include various high voltage power supplies. The data herein includes, but is not limited to, a power-on command and a command of a fuel cell engine.
In some embodiments, the fuel cell system is powered on to enter self-examination, which usually refers to examining the states, faults and the like of various sensors and actuators.
Further referring to Fig. 3, the method provided in the embodiments of the present invention is further explained and described by the embodiments of the present invention through Fig. 3.
As shown in Fig. 3, after the method provided in the embodiments of the present invention begins, the fuel cell system is powered on to transmit the data to the cloud server in real time, and the fuel cell system is powered on to enter self-examination. After the cloud server acquires the last power-off time and the current power-on time of the fuel cell system, the cloud server calculates the power-on time difference TO between the current power-on time and the last power-off time. The cloud server queries the ambient atmosphere humidity RHO of the fuel cell system within the power-on time difference TO. If the power-on time difference TO is greater than T (time threshold), and the power-on time difference TO is less than T (time threshold), the fuel cell system enters a normal operating state and does not need to be activated. If the power-on time difference TO is greater than T (time threshold), determining the relationship between the ambient atmosphere humidity RHO and the humidity threshold RH. If the time T1 when RHO > RH is less than nTO, that is, T1<nxTO, the cloud server sends the activation instruction to the fuel cell system controller and enters the activation process, then determining whether the activation result meets the standard value, and if so, the activation is finished and the fuel cell system enters the normal operating state. The normal operating state here refers to outputting power to drive the fuel cell vehicle under the operating condition at the normal operating point.
In another aspect, the embodiments of the present invention further provide an online activation device for a fuel cell system, referring to Fig. 4, the device includes:
a first acquisition module 401, configured to acquire a power-on time difference between a last power-off time and a current power-on time of the fuel cell system;
a second acquisition module 402, configured to acquire an ambient atmosphere humidity of the
I'D fuel cell system within the power-on time difference; a first comparison module 403, configured to compare the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result; a third acquisition module 404, configured to acquire a first time when the ambient atmosphere humidity is greater than the humidity threshold; a second comparison module 405, configured to compare the first time with the power-on time difference to obtain a second comparison result; an activation module 406, configured to determine, according to the first comparison result and the second comparison result, whether to activate the fuel cell system.
In some embodiments, the activation module 406 is configured to activate the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
In some embodiment, the activation module 406 is configured to determine whether to activate the fuel cell system according to a following formula: RHO>RH, and T1<nxTO.
Wherein RHO is the ambient atmosphere humidity, RH is the humidity threshold, T1 is the first time, TO is the power-on time difference, n is a proportional coefficient, and n E 0 to 1.
In some embodiments, the second acquisition module 402 is configured to acquire an average ambient atmosphere humidity of the fuel cell system within the power-on time difference, and take the average ambient atmosphere humidity as the ambient atmosphere humidity.
In some embodiments, the device further includes a fourth acquisition module, configured to acquire an activation result of the fuel cell system, and continue, when the activation result is less than an activation result threshold, activating the fuel cell system until the activation result is greater than or equal to the activation result threshold.
In some embodiments, the device further includes a fifth acquisition module, configured to acquire a humidity of a proton exchange membrane of the fuel cell system, an internal resistance value of the fuel cell system, or a voltage of the fuel cell system, and stop activation when the humidity of the proton exchange membrane is greater than the humidity threshold, or the internal resistance value is less than a resistance value threshold, or the voltage is less than a voltage threshold.
In some embodiments, the device further includes a sixth acquisition module, configured to acquire a change trend of the ambient atmosphere humidity of the fuel cell system within the power-on time difference, acquire a change time period corresponding to the change trend, and activate the fuel cell system according to the change time period and the change trend within the first time.
In some embodiments, the activation module 406 is configured to activate the fuel cell system when the change trend is a falling trend within the change time period adjacent to the power-on time.
Each embodiment of the present invention has been described above. The above descriptions are exemplary, non-exhaustive and also not limited to each disclosed embodiment. Many modifications and variations are apparent to those of ordinary skill in the art without departing from the scope and spirit of each described embodiment of the present invention. The terms used herein are selected to explain the principle and practical application of each embodiment or technical improvements in the market best or enable others of ordinary skill in the art to understand each embodiment disclosed herein.
Claims (8)
1. An online activation method for a fuel cell system, wherein the method comprises:
acquiring a power-on time difference between a last power-off time and a current power-on time of the fuel cell system;
when the power-on time difference is greater than a power-on time threshold, acquiring an ambient atmosphere humidity of the fuel cell system within the power-on time difference;
comparing the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result;
acquiring a first time when the ambient atmosphere humidity is greater than the humidity threshold;
comparing the first time with the power-on time difference to obtain a second comparison result; and
determining, according to the first comparison result and the second comparison result, whether to activate the fuel cell system, and activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
2. The method according to claim 1, wherein activating the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference comprises: determining whether to activate the fuel cell system according to a following formula: RHO>RH, and T1<nxTO;
wherein RHO is the ambient atmosphere humidity, RH is the humidity threshold, T1 is the first time, TO is the power-on time difference, n is a proportional coefficient, and n E 0 to 1.
3. The method according to claim 1, wherein acquiring the ambient atmosphere humidity of the fuel cell system within the power-on time difference comprises:
acquiring an average ambient atmosphere humidity of the fuel cell system within the power-on time difference, and taking the average ambient atmosphere humidity as the ambient atmosphere humidity.
4. The method according to claim 1, wherein the method further comprises: acquiring an activation result of the fuel cell system, and continuing, when the activation result is less than an activation result threshold, activating the fuel cell system until the activation result is greater than or equal to the activation result threshold.
5. The method according to claim 4, wherein the method further comprises: acquiring an humidity of a proton exchange membrane of the fuel cell system, an internal resistance value of the fuel cell system, or a voltage of the fuel cell system, and stopping activation when the humidity of the proton exchange membrane is greater than the humidity threshold, or the internal resistance value is less than a resistance value threshold, or the voltage is less than a voltage threshold.
6. The method according to claim 1, wherein the method further comprises: acquiring a change trend of the ambient atmosphere humidity of the fuel cell system within the power-on time difference, acquiring a change time period corresponding to the change trend, and activating the fuel cell system according to the change time period and the change trend within the first time.
7. The method according to claim 6, wherein activating the fuel cell system according to the change time period and the change trend comprises: activating the fuel cell system when the change trend is a falling trend within the change time period adjacent to the power-on time.
8. An online activation device for a fuel cell system, wherein the device comprises:
a first acquisition module, configured to acquire a power-on time difference between a last power-off time and a current power-on time of the fuel cell system;
a second acquisition module, configured to acquire an ambient atmosphere humidity of the fuel cell system within the power-on time difference;
a first comparison module, configured to compare the ambient atmosphere humidity with a humidity threshold to obtain a first comparison result;
a third acquisition module, configured to acquire a first time when the ambient atmosphere humidity is greater than the humidity threshold;
a second comparison module, configured to compare the first time with the power-on time difference to obtain a second comparison result; and
an activation module, configured to determine, according to the first comparison result and the second comparison result, whether to activate the fuel cell system, and activate the fuel cell system when the ambient atmosphere humidity is greater than the humidity threshold and the first time is less than the power-on time difference.
1 '7
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| CN202111126230.9A CN113571740B (en) | 2021-09-26 | 2021-09-26 | Online activation method and device for fuel cell system |
| CN202111126230.9 | 2021-09-26 | ||
| PCT/CN2022/112346 WO2023045616A1 (en) | 2021-09-26 | 2022-08-14 | Online activation method and activation device for fuel cell system |
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| CN114824371B (en) * | 2022-05-05 | 2024-06-14 | 中国第一汽车股份有限公司 | Activation control method and activation control device for fuel cell engine |
| CN115027390A (en) * | 2022-06-06 | 2022-09-09 | 阿尔特(北京)汽车数字科技有限公司 | Vehicle power-off time calculation method and device, electronic equipment and storage medium |
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| JP4664607B2 (en) * | 2004-02-27 | 2011-04-06 | 株式会社東芝 | FUEL CELL UNIT, INFORMATION PROCESSING DEVICE, FUEL CELL UNIT CONTROL METHOD, AND INFORMATION PROCESSING DEVICE POWER SUPPLY METHOD |
| JP2007035389A (en) * | 2005-07-26 | 2007-02-08 | Honda Motor Co Ltd | Fuel cell system and its control method |
| JP2008041646A (en) * | 2006-07-11 | 2008-02-21 | Canon Inc | Fuel cell system and activation treatment method of fuel cell |
| WO2008118962A1 (en) * | 2007-03-27 | 2008-10-02 | Bdf Ip Holdings Ltd. | Method of starting up fuel cell stacks from freezing temperatures |
| US20090305088A1 (en) * | 2008-06-06 | 2009-12-10 | Gm Global Technology Operations, Inc. | Modified startup strategy to improve startup reliability after extended off time |
| CN103797628B (en) * | 2011-09-15 | 2016-11-09 | 丰田自动车株式会社 | Fuel cell system |
| CN103595096B (en) * | 2013-11-11 | 2016-07-13 | 江苏超洁绿色能源科技有限公司 | A kind of DC/DC for proton exchange membrane fuel cell standby power converts and controls system |
| JP7117279B2 (en) * | 2019-09-09 | 2022-08-12 | 本田技研工業株式会社 | Fuel cell vehicle and method for setting scavenging time when vehicle is stopped |
| CN110400948A (en) * | 2019-09-17 | 2019-11-01 | 潍柴动力股份有限公司 | A kind of fuel cell pile activation method and device |
| CN111193052B (en) * | 2019-12-31 | 2021-05-18 | 潍柴动力股份有限公司 | Method and apparatus for controlling activation of fuel cell engine |
| CN111952638B (en) * | 2020-07-31 | 2023-09-26 | 同济大学 | Performance recovery system and method for vehicle fuel cell |
| CN112786924B (en) * | 2021-01-21 | 2023-11-14 | 金龙联合汽车工业（苏州）有限公司 | Startup and shutdown purging control method and system of fuel cell system |
| CN113224353B (en) * | 2021-05-08 | 2022-07-22 | 张家口市氢能科技有限公司 | Quick activation method and device for hydrogen fuel cell |
| CN113571740B (en) * | 2021-09-26 | 2021-12-03 | 北京亿华通科技股份有限公司 | Online activation method and device for fuel cell system |
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