CN114784341B - Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell - Google Patents
Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell Download PDFInfo
- Publication number
- CN114784341B CN114784341B CN202210297012.XA CN202210297012A CN114784341B CN 114784341 B CN114784341 B CN 114784341B CN 202210297012 A CN202210297012 A CN 202210297012A CN 114784341 B CN114784341 B CN 114784341B
- Authority
- CN
- China
- Prior art keywords
- flow
- air
- inflection point
- fuel cell
- pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 140
- 230000004044 response Effects 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 52
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 239000001257 hydrogen Substances 0.000 claims abstract description 131
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 131
- 238000005070 sampling Methods 0.000 claims abstract description 90
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000007405 data analysis Methods 0.000 claims abstract description 9
- 230000006870 function Effects 0.000 claims description 33
- 230000002159 abnormal effect Effects 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01M8/04—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
- H01M8/0494—Power, energy, capacity or load of fuel cell stacks
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Manufacturing & Machinery (AREA)
- 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)
- Computing Systems (AREA)
- Evolutionary Computation (AREA)
- Fuzzy Systems (AREA)
- Medical Informatics (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
Abstract
The application provides a method, a device and equipment for determining the air flow closed-loop response time of a hydrogen fuel cell, wherein the method comprises the following steps: the method has the advantages that the inflection point detection function is utilized to conduct data analysis, the starting inflection point and the ending inflection point of the air target pile-in flow in the power increasing stage of the hydrogen fuel cell can be accurately determined, and then the starting response time (the sampling time corresponding to the starting flow) of the air actual pile-in flow for the power step load and the ending response time (the sampling time corresponding to the ending flow) of the air actual pile-in flow for the power step load can be accurately determined, so that the air flow closed-loop response time of the hydrogen fuel cell can be accurately determined; and further, the operation of selecting the hydrogen fuel cell auxiliary system, matching the pile parameters, optimizing the control algorithm and the like can be guided according to the closed-loop response time length, so that the performance of the hydrogen fuel cell is effectively improved.
Description
Technical Field
The application belongs to the technical field of hydrogen fuel cells, and particularly relates to a method, a device and equipment for determining air flow closed-loop response time of a hydrogen fuel cell.
Background
In the process of operating a hydrogen fuel cell (hydrogen fuel cell for short), the proton exchange membrane hydrogen fuel cell has high requirements on reaction temperature, pressure, humidity and rotation speed, for example: pressure regulation of a hydrogen injection valve of the hydrogen treatment system and rotation speed control of a hydrogen circulating pump; air flow control of the air treatment system, rotating speed control of the air compressor and opening control of the back pressure valve; and temperature control of electric pile cooling and rotation speed control of a fan, temperature control of intercooler cooling and rotation speed control of a water pump in the thermal management system.
The parameters such as temperature, pressure, opening, rotating speed, flow rate and the like are key elements for controlling the hydrogen fuel cell, the parameters directly influence the efficiency and stability of the electrical performance of the output of the fuel cell, and the faster and earlier the control response of the parameters reaches a stable state, the more favorable the improvement of various performance indexes of the hydrogen fuel cell.
Therefore, the closed-loop response time of the air flow rate of the hydrogen fuel system is an important index for evaluating the performance of the hydrogen fuel cell system for the closed-loop control of the air flow rate. However, no effective method is available in the related art to accurately determine the closed-loop response time of the air circuit flow, so that the effective improvement of the performance index of the hydrogen fuel cell is affected.
Disclosure of Invention
Aiming at the problems existing in the prior art, the embodiment of the application provides a method, a device and equipment for determining the air flow closed-loop response time length of a hydrogen fuel cell, which are used for solving the technical problems that the air flow closed-loop response time length of a hydrogen fuel system cannot be determined in the prior art, and further the performance index of the hydrogen fuel cell is effectively improved.
In a first aspect of the present application, there is provided a method of determining a closed loop response time of an air flow rate of a hydrogen-fuel cell, the method comprising:
determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function;
when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point;
determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
and determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
In the above scheme, the determining, by using the inflection point detection function, a start inflection point and an end inflection point corresponding to the target hydrogen fuel cell air inflow rate in the power increasing stage of the hydrogen fuel cell system includes:
acquiring historical air flow data corresponding to the power of the hydrogen fuel cell system when carrying out historical power step load; the amplitude of the historical power step load is consistent with the amplitude of the current power step load;
based on a preset inflection point algorithm parameter combination, performing data analysis on the historical air flow data by using an inflection point detection function to obtain all inflection points of the air target pile-in flow;
extracting initial inflection points and end inflection points corresponding to the air target pile-up flow rate in the power increasing stage of the hydrogen fuel cell system from all inflection points;
wherein the inflection point algorithm parameter combinations include: the curve type of the air target pile-up flow response curve and the combination formed by the initial trend of the air target pile-up flow response curve.
In the above scheme, the obtaining the air target pile-up flow corresponding to the ending inflection point includes:
determining a corresponding first target sampling moment based on the ending inflection point;
determining the air target pile-up flow corresponding to the first target sampling moment from the acquired parameter data; the parameter data comprises a corresponding relation between the air target pile-up flow and the sampling time.
In the above scheme, the determining the initial flow and the final flow of the air actual pile-up flow based on the air target pile-up flow corresponding to the end inflection point and the current power step load pulling amplitude includes:
determining the maximum amplitude and the minimum amplitude of the current power step load;
determining the initial flow of the actual air pile-up flow according to the minimum amplitude and the air target pile-up flow corresponding to the ending inflection point; the initial flow is the product of the minimum amplitude and the air target pile-in flow corresponding to the ending inflection point;
determining the termination flow of the actual air pile-up flow according to the maximum amplitude and the air target pile-up flow corresponding to the end inflection point; and the termination flow is the product of the maximum amplitude and the air target pile-in flow corresponding to the ending inflection point.
In the above scheme, the determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow includes:
determining a first sampling time corresponding to the initial flow and a second sampling time corresponding to the termination flow from the acquired parameter data; the parameter data comprises a corresponding relation between the actual air pile-up flow and the sampling moment;
and determining the closed-loop response time length of the air flow of the hydrogen fuel cell based on the first sampling time and the second sampling time.
In the above solution, before determining the first sampling time corresponding to the initial flow and the second sampling time corresponding to the final flow from the collected parameter data, the method further includes:
if the acquired parameter data are determined to have abnormal air actual pile-up flow data, acquiring a second target sampling moment corresponding to the abnormal air actual pile-up flow data;
acquiring the actual air stacking flow data corresponding to the last sampling moment of the second target sampling moment;
and replacing the abnormal air actual pile-up flow data by using the previous air actual pile-up flow data.
In the above scheme, determining the closed-loop response time length of the air flow of the hydrogen fuel cell based on the first sampling time and the second sampling time includes:
and obtaining a time difference value between the second sampling time and the first sampling time, wherein the time difference value is the closed-loop response time length of the air flow of the hydrogen fuel cell.
In a second aspect of the present application, there is provided an apparatus for determining a closed loop response time of an air flow rate of a hydrogen-fuel cell, the apparatus comprising:
the first determining unit is used for determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by utilizing an inflection point detection function;
the obtaining unit is used for obtaining the air target pile-up flow corresponding to the ending inflection point when carrying out the current power step load on the power of the hydrogen fuel cell system;
the second determining unit is used for determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
and the third determining unit is used for determining the closed-loop response time length of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
In a third aspect of the application, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the method according to any of the first aspects.
In a fourth aspect the present application provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of the first aspects when executing the program.
The application provides a method, a device and equipment for determining the air flow closed-loop response time of a hydrogen-fuel cell, wherein the method comprises the following steps: determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function; when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point; determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling; determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow; therefore, the starting inflection point and the ending inflection point of the air target pile-in flow in the power-up stage of the hydrogen fuel cell can be accurately determined by utilizing the inflection point detection function for data analysis, and further, the starting response time (the sampling time corresponding to the starting flow) of the air actual pile-in flow for the power step load and the ending response time (the sampling time corresponding to the ending flow) of the air actual pile-in flow for the power step load can be accurately determined, so that the air flow closed-loop response time of the hydrogen fuel cell can be accurately determined; and further, the operation of selecting the hydrogen fuel cell auxiliary system, matching the pile parameters, optimizing the control algorithm and the like can be guided according to the closed-loop response time length, so that the performance of the hydrogen fuel cell is effectively improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures.
In the drawings:
FIG. 1 is a schematic flow chart of a method for determining the air flow closed-loop response time length of a hydrogen-fuel cell according to an embodiment of the present application;
FIG. 2 is a schematic diagram of power conditions when a power step load is applied to a hydrogen-operated battery system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an air target in-stack flow response curve when the hydrogen fuel cell system according to the embodiment of the present application performs power step load;
FIGS. 4-7 are schematic diagrams illustrating the determination of the inflection points of the hydrogen fuel cell air target in-stack flow rate corresponding to the hydrogen fuel cell system during power step load in accordance with an embodiment of the present application;
FIG. 8 is a schematic diagram of a ringing curve according to an embodiment of the present application;
FIG. 9 is a graph showing a monotonically increasing curve provided by an embodiment of the present application;
FIG. 10 is a schematic structural diagram of an apparatus for determining the air flow closed-loop response time of a hydrogen-fuel cell according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a computer device according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a computer readable storage medium according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present specification are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification and the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined without conflict.
In order to better understand the technical scheme of the application, the concept of the airflow closed-loop response time length of the hydrogen fuel cell is introduced. The closed-loop response time of the air flow of the hydrogen fuel cell is also called as air flow control (closed-loop) response time of an air circuit of the hydrogen fuel cell system, and refers to the time taken for the actual air to reach 90% of the air target flow from 10% of the air target flow when the air target flow is changed in a step mode. The shorter the response time length, the better the performance of the hydrogen fuel cell system, and thus the response time length must be accurately determined.
The difficulty in determining the response time length is that in normal operation of the hydrogen fuel cell system, the target air inlet flow and the actual air inlet flow acquired from the CAN bus are both real-time variable quantities. From a plurality of data changing in real time, it is difficult to determine which moment is the starting moment and the ending moment of the air target pile-up flow step; the present embodiment thus provides a method for determining the air flow closed-loop response time of a hydrogen fuel cell based on the above-mentioned problems, as shown in fig. 1, comprising the steps of:
s110, determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function;
in order to accurately determine the starting time and the ending time of the air target pile-up flow step, the embodiment utilizes an inflection point detection function to determine the starting inflection point and the ending inflection point of the air target pile-up flow of the hydrogen fuel cell corresponding to the power-up stage of the hydrogen fuel cell system.
The inflection point detection function of the embodiment is a KneeLocator function of a kneed database of python, and the core is to determine each inflection point of the air target pile-up flow in the power step load stage by utilizing a big data algorithm principle, so that the accuracy is high.
Then, in one embodiment, determining a start inflection point and an end inflection point of the hydrogen fuel cell air target in-stack flow rate corresponding to the power-up phase of the hydrogen fuel cell system using the inflection point detection function includes:
acquiring historical air flow data corresponding to the power of the hydrogen fuel cell system when carrying out historical power step load; the amplitude of the historical power step load is consistent with the amplitude of the current power step load;
based on a preset inflection point algorithm parameter combination, performing data analysis on the historical air flow data by using an inflection point detection function to obtain all inflection points of the air target pile-up flow;
extracting initial inflection points and end inflection points corresponding to the target air inlet flow rate in the power increasing stage of the hydrogen fuel cell system from all inflection points;
wherein the inflection point algorithm parameter combination comprises: the combination of the curve type of the air target pile-up flow response curve and the initial trend formation of the air target pile-up flow response curve.
Specifically, to ensure the accuracy of the inflection point, the magnitude of the historical power step pull is consistent with the magnitude of the current power step pull when the historical airflow data is acquired. Such as: the amplitude of the historical power step pulling load and the amplitude of the current power step pulling load can be 10-90% of rated power.
Here, the historical air flow data includes: historical air target pile-up flow data and historical air actual pile-up flow data. When the historical power step load is carried out, the historical air flow data is collected in real time through the message signal of the CAN bus, and the collection period CAN be in the ms level, for example, 10ms. Of course, the collected data may include other data such as state machine state, overall vehicle power demand, and hydrogen fuel cell output power. In addition, it may further include: the fault judgment parameter data used for abnormal data acquisition and other parameter data convenient for auxiliary data analysis can be specifically defined according to the characteristics of the hydrogen-gas power system without limitation.
It is noted that when collecting data, it is necessary to ensure that data of transient to steady state process in which the power of the hydrogen fuel cell is pulled up from 8kW to 72kW can be collected in its entirety, and data corresponding to a period of time before the power starts to pull up and a period of time after the power is pulled up is also required to be collected (for example, 100s before the power starts to pull up and 100s after the power starts to pull up to 72 kW).
The whole data acquisition time period can be determined by the characteristics of the hydrogen fuel system, for example, the acquisition time period in the embodiment can be 1000s.
In the embodiment, the step change of the air target pile-up flow rate is set as the step of the air flow rate in the power-up stage of the hydrogen-fuel electric system; the power-up phase of the hydrogen-fuel electric system refers to a phase in which the power of the hydrogen-fuel electric system is pulled from 10% of rated power to 90% of rated power. For example, when the rated power of the hydrogen-powered system is 80kW, the power-up phase is a phase of pulling from 8kW to 72 kW.
When the power of the hydrogen fuel cell system is subjected to power step load, the following steps are realized:
first, the hydrogen fuel cell system is started up to an idle state for 100s; then, the power is pulled to 8kW and kept for more than 100 seconds; then, pulling the power from 8kW to 72kW, and keeping the power for more than 30 seconds; finally, the power is again down-loaded to 8kW for a period of time. The time period for maintaining 8kW may be set according to actual conditions, and is not limited herein. The resulting hydrogen fuel cell system operating conditions may be as shown in fig. 2.
The air target in-stack flow will have a corresponding response curve during a power step pull, as shown in fig. 3. In this embodiment, the inflection point detection function is used to determine the inflection point on the response curve of the air target pile-up flow.
Here, the inflection point detection function is KneeLocator (x, y, curved, direction, online); wherein,,
x is a horizontal axis data sequence corresponding to the data to be detected, such as sampling time;
y is a data sequence to be detected, and a corresponding value under the condition of x, such as the air target stacking flow;
curve: str type, curve type, includes two kinds: the convex represents the curve as convex and the concave represents the curve as concave;
direction: str type, representing the initial trend marking parameters of the curve, comprising two types: the initial trend is an increasing mode, and the decreasing mode is a decreasing mode;
online: a bool type, which is an identification mode; comprising two kinds of: true represents an online recognition mode in which each local inflection point is recognized from right to left along the x-axis;
the inflection point algorithm combination of the present embodiment mainly includes the following four combinations:
when cure= 'save' +direct= 'include': the curve is shown as concave and the initial trend is in the increasing mode;
when cure= 'save' +direct= 'de-creation': the curve is shown as concave and the initial trend is a decreasing pattern;
when cure= 'con' +direction= 'introduction': the curve is shown as convex and the initial trend is in the increasing mode;
when cure= 'con' +direction= 'decryption': the curve is shown as convex and the initial trend is a decreasing pattern;
that is, the inflection point algorithm parameter combination includes: the air target flow response curve is concave and the initial trend is an increasing mode,
And determining each inflection point moment of the air target pile-up flow through four combination parameters of the KneeLocator (), and referring to figures 4 to 7, obtaining four inflection point moments and corresponding air target pile-up flow.
In fig. 4 to 7, the inflection point S1 is an inflection point corresponding to the air target pile-up flow before the step-up phase occurs, the inflection point S2 is an inflection point corresponding to the air target pile-up flow after the step-up phase occurs, the inflection point S3 is an inflection point corresponding to the air target pile-up flow after the step-up phase enters the steady state at the steady state end time, and the inflection point S3 is an inflection point corresponding to the air target pile-up flow at the power-down end.
After all inflection points are determined, the initial inflection point and the end inflection point corresponding to the air target pile-in flow rate in the power increasing stage of the hydrogen fuel cell system can be extracted from all the inflection points; that is, in this embodiment, the starting inflection point is S1 inflection point, and the ending inflection point is S2.
S111, when the current power step load is carried out on the power of the hydrogen fuel cell system, acquiring the air target pile-up flow corresponding to the ending inflection point;
after the initial inflection point and the end inflection point corresponding to the power increasing stage of the hydrogen fuel cell system are determined, the current power step load pulling is carried out on the power of the hydrogen fuel cell system, so that the air flow closed-loop response time length of the hydrogen fuel cell is determined.
The method mainly comprises the step of obtaining the air target pile-in flow corresponding to the ending inflection point.
In particular, parameter data needs to be collected simultaneously when the current power step pull is performed. As with the historical power step pull load, the parameter data may include: sampling time, actual air pile-up flow and target air pile-up flow; of course, the parameter data may also be determined according to the actual needs, for example, the parameter data may further include: state machine state, overall vehicle power demand, hydrogen fuel cell output power, etc. In addition, the parameter data may further include: the fault judgment parameters used for abnormal data acquisition and other parameter data convenient for auxiliary data analysis can be specifically defined according to the characteristics of the hydrogen-gas power system without limitation.
Likewise, when collecting data, it is necessary to ensure that data of a transient to steady state process in which the power of the hydrogen fuel cell is pulled up from 8kW to 72kW can be collected all together, and data corresponding to a period of time before the power starts to be pulled up and a period of time after the power is pulled up is also required to be collected (for example, 100s before the power starts to be pulled up and 100s after the power starts to be pulled up to 72 kW); the whole data acquisition time is 1000s.
After the air target pile-in flow is acquired, the air target pile-in flow corresponding to the ending inflection point is acquired, so that the initial flow and the end flow corresponding to the actual pile-in flow of the air in the current power step load pulling process can be determined according to the air target pile-in flow corresponding to the ending inflection point.
It is noted that the type of response curve of the actual air flow from transient to steady process at the time of the previous power step pull may be of the ringing type or of the monotonically rising type. Wherein the ringing type curve may be as shown in fig. 8 and the monotonically increasing type curve may be as shown in fig. 9.
The closed-loop response time of the air flow exists in both the ringing type curve and the monotonically rising type curve, so that the starting inflection point S1 and the ending inflection point S2 corresponding to the air target pile-up flow in the power-up stage of the hydrogen fuel cell system exist in both fig. 8 and 9.
In one embodiment, obtaining the air target pile-up flow corresponding to the ending inflection point includes:
determining a corresponding first target sampling moment based on the ending inflection point;
and determining the air target pile-up flow corresponding to the first target sampling time from the acquired parameter data, wherein the parameter data comprises the corresponding relation between the air target pile-up flow and the sampling time.
Thus, the air target pile-up flow corresponding to the end inflection point S2 is determined. The air target pile-up flow rate corresponding to the end inflection point S2 in fig. 8 and 9 is f trg 。
S112, determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load;
after the air target pile-up flow corresponding to the ending inflection point is determined, the initial flow and the final flow of the air actual pile-up flow can be determined based on the air target pile-up flow corresponding to the ending inflection point and the current power step load pulling amplitude.
In one embodiment, determining the initial flow and the final flow of the air actual in-pile flow based on the air target in-pile flow corresponding to the end inflection point and the magnitude of the current power step pull load includes:
determining the maximum amplitude and the minimum amplitude of the current power step load;
determining the initial flow of the actual air pile-up flow according to the minimum amplitude and the air target pile-up flow corresponding to the ending inflection point; the initial flow is the product of the minimum amplitude and the air target pile-in flow corresponding to the ending inflection point;
determining the termination flow of the actual air pile-in flow according to the air target pile-in flow corresponding to the maximum amplitude and the termination inflection point; the ending flow is the product of the maximum amplitude and the air target pile-in flow corresponding to the ending inflection point.
That is, when the hydrogen combustion system power is pulled from 10% of rated power to 90% of rated power, the minimum amplitude of the current power step pull is 10% and the maximum amplitude is 90%; the initial flow rate f of the actual air flow rate into the stack can be determined based on the following formula (1) Q Determining a termination flow f of the actual air flow rate based on the following formula (2) R ：
f Q ＝f trg ×10％ (1)
f R ＝f trg ×90％ (2)
Thus, the initial flow and the final flow of the actual air pile-up flow are determined when the current power step load is pulled.
And S113, determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
After the initial flow and the final flow of the actual air pile-up flow are determined, the closed-loop response time of the air flow of the hydrogen fuel cell can be determined according to the sampling time corresponding to the initial flow and the sampling time corresponding to the final flow, and the method comprises the following steps:
determining a first sampling time corresponding to the initial flow and a second sampling time corresponding to the end flow from the acquired parameter data; the parameter data comprises a corresponding relation between the actual air pile-up flow and the sampling moment;
and determining the closed-loop response time length of the air flow of the hydrogen fuel cell based on the first sampling time and the second sampling time.
As can be seen from fig. 5 and 6, the first sampling instant is t Q The second sampling time is t R 。
In one embodiment, determining the hydrogen fuel cell air flow closed-loop response time based on the first sampling time and the second sampling time includes:
and obtaining a time difference value between the second sampling time and the first sampling time, wherein the time difference value is the closed-loop response time length of the air flow of the hydrogen fuel cell.
That is, the hydrogen fuel cell air flow closed-loop response time period t may be determined according to equation (3):
t＝t R -t Q (3)
in formula (3), t Q For the first sampling instant, t R Is the second sampling instant.
In the process of collection, abnormal data may occur in the actual air flow rate data, such as missing values, abnormal values, inconsistent values, repeated data, and special symbols. Therefore, it is further required to determine whether there is an abnormality in the actual pile-up flow data, and if there is an abnormality, the method further includes:
if the acquired parameter data are determined to have abnormal air actual pile-up flow data, acquiring a second target sampling moment corresponding to the abnormal air actual pile-up flow data;
acquiring the actual air pile-up flow data corresponding to the last sampling moment of the second target sampling moment;
and replacing the abnormal air actual pile-up flow data corresponding to the second target sampling moment by using the previous air actual pile-up flow data.
In one embodiment, determining whether there is an anomaly in the actual pile-up flow data is implemented as follows:
the missing value field and the number of the actual heap-entry flow data can be obtained by checking the summarization statistics of the parameter data through df.unscriptable () and df.info () functions;
the maximum value and the minimum value of the actual pile-up flow data can be returned through functions df.max () and df.min (); and drawing a normal distribution map of the actual pile-up flow data through a seaborn drawing tool of Python to obtain abnormal points of the actual pile-up flow data.
In the embodiment, considering the continuity of closed-loop control of the air circuit flow, the data missing value of the actual stack inlet flow of the extremely individual air can be filled through the air flow value at the previous moment; if the abnormal upper punch of the air flow value appears when the air circuit flow just steps to the high point, the abnormal upper punch is obviously higher than other values, and the abnormal value can be replaced by adopting the air actual progress flow data at the previous moment.
Therefore, effective air actual pile-up flow data with higher quality can be obtained, and a data basis is provided for improving the precision of closed loop response time.
According to the embodiment, through collecting real and effective air flow data, the starting and stopping time (inflection point) of the step generated by the air target stack inlet flow is accurately obtained by setting a KneeLocator () call of four possible combination parameters by utilizing a KneeLocator module function of a kneed database under the working condition that the hydrogen fuel cell system is pulled to 72kW power, and on the basis, the starting response time (sampling time corresponding to the starting flow) of the air actual stack inlet flow for the power step pulling and the ending response time (sampling time corresponding to the ending flow) of the air actual stack inlet flow for the power step pulling are accurately determined, so that the air flow closed-loop response time of the hydrogen fuel cell can be accurately determined; and furthermore, the operation of selecting the hydrogen fuel cell auxiliary system, matching the pile parameters, optimizing the FCCU controller control algorithm and the like can be guided according to the closed-loop response time length, so that the performance of the hydrogen fuel cell is effectively improved.
Based on the same inventive concept, the present embodiment further provides an apparatus for determining a closed-loop response duration of an air flow rate of a hydrogen fuel cell, as shown in fig. 10, where the apparatus includes:
a first determining unit 101, configured to determine a start inflection point and an end inflection point corresponding to the hydrogen fuel cell air target in-pile flow rate in a power-up stage of the hydrogen fuel cell system by using an inflection point detection function;
an obtaining unit 102, configured to obtain an air target in-pile flow corresponding to the ending inflection point when performing a current power step load on the power of the hydrogen fuel cell system;
a second determining unit 103, configured to determine an initial flow and a final flow of the air actual in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the magnitude of the current power step pull load;
and a third determining unit 104, configured to determine a closed-loop response duration of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
The specific functions of the above units may be referred to the corresponding descriptions in the above method embodiments, and are not repeated herein. Since the device described in the embodiments of the present application is a device used for implementing the method of the embodiments of the present application, based on the method described in the embodiments of the present application, a person skilled in the art can understand the specific structure and the deformation of the device, and therefore, the description thereof is omitted herein. All devices used in the method of the embodiment of the application are within the scope of the application.
The present embodiment provides a computer device 1100, as shown in fig. 11, including a memory 1110, a processor 1120, and a computer program 1111 stored in the memory 1110 and executable on the processor 1120, wherein the processor 1120 performs the following steps when executing the computer program 1111:
determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function;
when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point;
determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
and determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
In a specific implementation, the processor 1120, when executing the computer program 1111, may implement any of the embodiments described above.
Since the computer device described in this embodiment is a device for implementing the method for determining the closed-loop response duration of the air flow rate of the hydrogen-fuel cell according to the embodiment of the present application, based on the method described in the foregoing embodiment of the present application, those skilled in the art will be able to understand the specific implementation of the computer device and various modifications thereof, so that the method for implementing the embodiment of the present application by the server will not be described in detail herein. The apparatus used to implement the methods of embodiments of the present application will be within the scope of the intended protection of the present application.
Based on the same inventive concept, the present embodiment provides a computer-readable storage medium 1200, as shown in fig. 12, having stored thereon a computer program 1211, which computer program 1211, when executed by a processor, implements the steps of:
determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function;
when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point;
determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
and determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow.
In a specific implementation, the computer program 1211, when executed by a processor, may implement any of the foregoing embodiments.
The method, the device and the equipment for determining the closed-loop response time of the air flow of the hydrogen fuel cell provided by the embodiment of the application have the following beneficial effects:
the application provides a method, a device and equipment for determining the air flow closed-loop response time of a hydrogen fuel cell, wherein the method comprises the following steps: determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function; when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point; determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling; determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow; therefore, the starting inflection point and the ending inflection point of the air target pile-in flow in the power-up stage of the hydrogen fuel cell can be accurately determined by utilizing the inflection point detection function for data analysis, and further, the starting response time (the sampling time corresponding to the starting flow) of the air actual pile-in flow for the power step load and the ending response time (the sampling time corresponding to the ending flow) of the air actual pile-in flow for the power step load can be accurately determined, so that the air flow closed-loop response time of the hydrogen fuel cell can be accurately determined; and further, the operation of selecting the hydrogen fuel cell auxiliary system, matching the pile parameters, optimizing the control algorithm and the like can be guided according to the closed-loop response time length, so that the performance of the hydrogen fuel cell is effectively improved.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
The above description is not intended to limit the scope of the application, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the application.
Claims (9)
1. A method of determining a closed loop response time for a hydrogen fuel cell air flow rate, the method comprising:
determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by using an inflection point detection function;
when the power of the hydrogen fuel cell system is carried out for the current power step load, acquiring the air target pile-in flow corresponding to the ending inflection point;
determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow;
the method for determining the initial inflection point and the end inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by utilizing the inflection point detection function comprises the following steps:
acquiring historical air flow data corresponding to the power of the hydrogen fuel cell system when carrying out historical power step load; the amplitude of the historical power step load is consistent with the amplitude of the current power step load, and the amplitude of the historical power step load and the amplitude of the current power step load are both 10% -90% of rated power;
based on a preset inflection point algorithm parameter combination, performing data analysis on the historical air flow data by using an inflection point detection function to obtain all inflection points of the air target pile-in flow;
extracting initial inflection points and end inflection points corresponding to the air target pile-up flow rate in the power increasing stage of the hydrogen fuel cell system from all inflection points;
wherein the inflection point algorithm parameter combinations include: the curve type of the air target pile-up flow response curve and the combination formed by the initial trend of the air target pile-up flow response curve.
2. The method of claim 1, wherein the obtaining the target air inflow corresponding to the ending inflection point comprises:
determining a corresponding first target sampling moment based on the ending inflection point;
determining the air target pile-up flow corresponding to the first target sampling moment from the acquired parameter data; the parameter data comprises a corresponding relation between the air target pile-up flow and the sampling time.
3. The method of claim 1, wherein determining the start flow and the end flow of the actual air in-stack flow based on the target air in-stack flow corresponding to the end inflection point and the magnitude of the current power step pull load comprises:
determining the maximum amplitude and the minimum amplitude of the current power step load;
determining the initial flow of the actual air pile-up flow according to the minimum amplitude and the air target pile-up flow corresponding to the ending inflection point; the initial flow is the product of the minimum amplitude and the air target pile-in flow corresponding to the ending inflection point;
determining the termination flow of the actual air pile-up flow according to the maximum amplitude and the air target pile-up flow corresponding to the end inflection point; and the termination flow is the product of the maximum amplitude and the air target pile-in flow corresponding to the ending inflection point.
4. The method of claim 1, wherein determining the closed-loop response time of the air flow rate of the hydrogen-fuel cell according to the sampling time corresponding to the initial flow rate and the sampling time corresponding to the final flow rate comprises:
determining a first sampling time corresponding to the initial flow and a second sampling time corresponding to the termination flow from the acquired parameter data; the parameter data comprises a corresponding relation between the actual air pile-up flow and the sampling moment;
and determining the closed-loop response time length of the air flow of the hydrogen fuel cell based on the first sampling time and the second sampling time.
5. The method of claim 4, wherein the determining from the collected parameter data a first sampling time corresponding to the start flow and a second sampling time corresponding to the end flow is preceded by the method further comprising:
if the acquired parameter data are determined to have abnormal air actual pile-up flow data, acquiring a second target sampling moment corresponding to the abnormal air actual pile-up flow data;
acquiring the actual air stacking flow data corresponding to the last sampling moment of the second target sampling moment;
and replacing the abnormal air actual pile-up flow data by using the previous air actual pile-up flow data.
6. The method of claim 4, wherein determining a hydrogen fuel cell air flow closed-loop response time based on the first sampling time and the second sampling time comprises:
and obtaining a time difference value between the second sampling time and the first sampling time, wherein the time difference value is the closed-loop response time length of the air flow of the hydrogen fuel cell.
7. An apparatus for determining a closed loop response time of a hydrogen fuel cell air flow rate, the apparatus comprising:
the first determining unit is used for determining a starting inflection point and an ending inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by utilizing an inflection point detection function;
the obtaining unit is used for obtaining the air target pile-up flow corresponding to the ending inflection point when carrying out the current power step load on the power of the hydrogen fuel cell system;
the second determining unit is used for determining the initial flow and the final flow of the actual air in-pile flow based on the air target in-pile flow corresponding to the ending inflection point and the amplitude of the current power step load pulling;
the third determining unit is used for determining the closed-loop response time of the air flow of the hydrogen fuel cell according to the sampling time corresponding to the initial flow and the sampling time corresponding to the end flow;
the method for determining the initial inflection point and the end inflection point corresponding to the air target reactor inlet flow rate of the hydrogen fuel cell in the power increasing stage of the hydrogen fuel cell system by utilizing the inflection point detection function comprises the following steps:
acquiring historical air flow data corresponding to the power of the hydrogen fuel cell system when carrying out historical power step load; the amplitude of the historical power step load is consistent with the amplitude of the current power step load, and the amplitude of the historical power step load and the amplitude of the current power step load are both 10% -90% of rated power;
based on a preset inflection point algorithm parameter combination, performing data analysis on the historical air flow data by using an inflection point detection function to obtain all inflection points of the air target pile-in flow;
extracting initial inflection points and end inflection points corresponding to the air target pile-up flow rate in the power increasing stage of the hydrogen fuel cell system from all inflection points;
wherein the inflection point algorithm parameter combinations include: the curve type of the air target pile-up flow response curve and the combination formed by the initial trend of the air target pile-up flow response curve.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method of any of claims 1 to 6.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 6 when executing the program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297012.XA CN114784341B (en) | 2022-03-24 | 2022-03-24 | Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297012.XA CN114784341B (en) | 2022-03-24 | 2022-03-24 | Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114784341A CN114784341A (en) | 2022-07-22 |
| CN114784341B true CN114784341B (en) | 2023-08-22 |
Family
ID=82425866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210297012.XA Active CN114784341B (en) | 2022-03-24 | 2022-03-24 | Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114784341B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX9306803A (en) * | 1992-10-29 | 1994-04-29 | Johnson Service Co | ADAPTIVE CONTROLLER OF PATTERN RECOGNITION. |
| JPH0876807A (en) * | 1994-09-09 | 1996-03-22 | Toshiba Corp | Identification device for process transmission function |
| US5780994A (en) * | 1997-03-21 | 1998-07-14 | Securaplane Technologies, L.L.C. | Detection of inflection point in secondary-battery charging process by matching voltage response to first derivative of battery's characteristic curve |
| WO2005011038A2 (en) * | 2003-07-25 | 2005-02-03 | Nissan Motor Co., Ltd. | Device and method for controlling fuel cell and fuel cell system |
| JP2012173889A (en) * | 2011-02-18 | 2012-09-10 | Fuji Electric Co Ltd | Control device |
| CN106021092A (en) * | 2016-05-04 | 2016-10-12 | 北京小米移动软件有限公司 | Method and device for determining starting duration of application program |
| CN111398202A (en) * | 2020-03-16 | 2020-07-10 | 广东小天才科技有限公司 | Gas data analysis method, gas data analysis device, electronic device, and storage medium |
| CN111942230A (en) * | 2020-07-21 | 2020-11-17 | 东风汽车集团有限公司 | Fuel cell automobile power control method, fuel cell controller and fuel cell |
| CN113910909A (en) * | 2021-09-30 | 2022-01-11 | 潍柴动力股份有限公司 | Method, device, equipment and medium for detecting performance of hydrogen fuel cell system |
-
2022
- 2022-03-24 CN CN202210297012.XA patent/CN114784341B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX9306803A (en) * | 1992-10-29 | 1994-04-29 | Johnson Service Co | ADAPTIVE CONTROLLER OF PATTERN RECOGNITION. |
| JPH0876807A (en) * | 1994-09-09 | 1996-03-22 | Toshiba Corp | Identification device for process transmission function |
| US5780994A (en) * | 1997-03-21 | 1998-07-14 | Securaplane Technologies, L.L.C. | Detection of inflection point in secondary-battery charging process by matching voltage response to first derivative of battery's characteristic curve |
| WO2005011038A2 (en) * | 2003-07-25 | 2005-02-03 | Nissan Motor Co., Ltd. | Device and method for controlling fuel cell and fuel cell system |
| JP2012173889A (en) * | 2011-02-18 | 2012-09-10 | Fuji Electric Co Ltd | Control device |
| CN106021092A (en) * | 2016-05-04 | 2016-10-12 | 北京小米移动软件有限公司 | Method and device for determining starting duration of application program |
| CN111398202A (en) * | 2020-03-16 | 2020-07-10 | 广东小天才科技有限公司 | Gas data analysis method, gas data analysis device, electronic device, and storage medium |
| CN111942230A (en) * | 2020-07-21 | 2020-11-17 | 东风汽车集团有限公司 | Fuel cell automobile power control method, fuel cell controller and fuel cell |
| CN113910909A (en) * | 2021-09-30 | 2022-01-11 | 潍柴动力股份有限公司 | Method, device, equipment and medium for detecting performance of hydrogen fuel cell system |
Non-Patent Citations (1)
| Title |
|---|
| 高压燃料电池发动机进气压力控制试验研究;孙业祺;许思传;倪淮生;常国峰;宁可望;赵阳;林凡;;车用发动机(05);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114784341A (en) | 2022-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112467176B (en) | Hydrogen pressure control method and device for fuel cell engine system | |
| CN111864769B (en) | Frequency modulation parameter determination method and system considering frequency response characteristics of fan and system | |
| CN114050290B (en) | Fuel cell purging method, system, control method and control device | |
| CN113948743B (en) | Temperature regulation and control method and device for vehicle-mounted fuel cell | |
| CN114784341B (en) | Method, device and equipment for determining air flow closed-loop response time of hydrogen-fuel cell | |
| CN104156285B (en) | Section fuel cell Processing for Data Analysis in Physics and system based on VBA modules | |
| CN116565402A (en) | Energy storage battery cooling system and control method | |
| CN108879811A (en) | Multiple-unit power module control method, controller and direct current quick charge stake | |
| CN113809370B (en) | Method, device and system for controlling operation temperature of fuel cell stack | |
| CN114784340A (en) | Method, apparatus, medium, and device for determining hydrogen fuel cell air flow overshoot | |
| CN112659927B (en) | Method, apparatus, device and medium for determining performance characteristics of fuel cell stack for vehicle | |
| CN117525692A (en) | Control method and system of safe energy storage system | |
| CN114883609B (en) | Steady state error calculating method and device for fuel cell system | |
| CN116930596B (en) | Fan current detection control method and system | |
| CN217522063U (en) | Water separator test system | |
| CN115548382B (en) | Activation control method and device for fuel cell stack, fuel cell test bench and medium | |
| CN217641427U (en) | Testing arrangement suitable for fuel cell air compressor machine | |
| CN114335602B (en) | Hydrothermal management method, hydrothermal management device, electronic equipment and storage medium | |
| CN115792630A (en) | Fuel cell service life prediction method based on working condition decomposition and automatic test | |
| CN113484575B (en) | Power angle search-based generator phase advance capability pre-evaluation method, equipment and medium | |
| CN113379237B (en) | Peak regulation adaptability judging method and system for proton exchange membrane fuel cell | |
| CN111082454B (en) | Method and system for obtaining oscillation risk quantitative index of power system | |
| CN116885243A (en) | Fuel cell air system control method and device | |
| CN115099712B (en) | Power grid operation mode data generation method, device, terminal and medium | |
| CN112035793B (en) | Non-intrusive identification method and system for motor electric appliances based on discrete second derivative |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |