CN117133950A - Control parameter regulation and control method and system for fuel cell system - Google Patents
Control parameter regulation and control method and system for fuel cell system Download PDFInfo
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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
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
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- 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
- H01M8/04559—Voltage of fuel cell stacks
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- 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
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- H01M8/04589—Current of fuel cell stacks
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- 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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- 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
A control parameter regulation and control method and system for fuel cell system, which belongs to the technical field of fuel cell system, includes BOL state, collecting reference current of pile voltage meeting corresponding reference voltage; in the running state, every time the pile current reaches the reference current, pile voltage is collected and calculated with the reference voltage to obtain the battery attenuation rate; and in the time period between the current of the electric pile and the reference current, collecting the current of the electric pile to obtain a theoretical control parameter, correcting the theoretical control parameter according to the attenuation rate of the battery to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent. The application selects the reference current point to collect the pile voltage to calculate the attenuation rate based on the existing input-output association relation of the fuel cell system, corrects the control parameter control target according to the attenuation rate, and improves the control accuracy and the safety of the battery.
Description
Technical Field
The application relates to the technical field of fuel cell systems, in particular to a control parameter regulation and control method and system for a fuel cell system.
Background
The fuel cell system (fuel cell for short) is one of the green energy technologies which are widely focused at present, has the advantages of no pollution, high energy conversion rate, short charging time, low working temperature, low noise and the like, and is widely applied to various fields of transportation vehicles, mobile portable power supply equipment, wind power photovoltaic energy storage and absorption and the like. The fuel cell can directly convert hydrogen energy into electric energy without being limited by a carnot cycle, the efficiency of the fuel cell can reach more than 50 percent, and the efficiency of the fuel cell can reach more than 80 percent if the fuel cell is matched with thermoelectric recovery.
The stack of the fuel cell is a combination of a plurality of single cells connected in series, and is a core component of the fuel cell. The basic principle of the galvanic pile is that hydrogen and oxygen are utilized to generate oxidation-reduction reaction under the action of a catalyst to generate current and water. Specifically, the required electric power is generated by supplying a fuel gas such as hydrogen to the anode side of the fuel cell stack and an oxidizing gas such as air including oxygen to the cathode side, and reacting between the two through an electrolyte membrane. Since this reaction generates heat in the fuel cell, it is necessary to provide a cooling system for cooling the fuel cell stack.
As shown in fig. 1, the characteristic curves of the fuel cell BOL (Beginning Of Life, end of Life) and EOL (End of Life) are shown, wherein the characteristic curve of the fuel cell BOL is located above, the characteristic curve of the fuel cell EOL is located below, the abscissa in fig. 1 is the stack current, the unit is a, and the ordinate is the cell voltage, the unit is V. In the graph, the point A is OCV (open circuit voltage, open-circuit voltage), the open-circuit voltage is 0.95V-1.05V, and the corresponding efficiency is 75.7% -83.7%. And the point B is the highest limit of the cell voltage for normal operation of the galvanic pile, and the corresponding efficiency is 67.8%. The C point is a galvanic pileThe rated power point cell voltage is recommended, corresponding to an efficiency of 51.8%. And the point D is the lowest limit value of the recommended operation monomer voltage of the galvanic pile, and the corresponding efficiency is 47.8%. As can be seen from the figure, the fuel cell decays in the EOL state, which is reflected in a drop in the cell voltage corresponding to the same stack current. Because the single cells are connected in series, the currents of all the single cells are consistent, the voltages of different single cells can be different, the fuel cell can attenuate in the use process, and the single voltages of different single cells can be reduced to different degrees under the same current of a pile. In general, the stack voltage ε at the same stack current point is defined by the fuel cell EOL cell 20% decrease, namely EOL.
In general, there is a correlation between control parameters of the fuel cell system and system outputs, the fuel cell system outputs include a stack voltage and a stack current, the control parameters of the fuel cell are used to control the operation states thereof, different operation states correspond to different stack voltages and stack currents, and these control parameters include a flow rate, a temperature, a pressure, and an excess coefficient, wherein the control parameters for the air system and the hydrogen system of the fuel cell are mainly the flow rate, the temperature, the pressure, and the excess coefficient, and the control parameters for the cooling system of the fuel cell are mainly the flow rate, the temperature, and the pressure.
The correlation between the control parameter and the output of the fuel cell, i.e. the stack voltage and the stack current, is not considered in the prior art, and therefore, the correlation is fixed by default, and is mostly designed based on the BOL state. When the fuel cell runs, the real-time output data is collected, the corresponding real-time control parameters are reversely deduced according to the pre-acquired association relation, the standard control parameters corresponding to the pile current in the real-time output data are compared with the real-time control parameters, if the standard control parameters are inconsistent, the real-time control parameters are adjusted to be consistent with the standard control parameters, and the association relation is actually changed along with the attenuation of the cell, so that the adaptability of the control parameter adjusting and controlling method in the prior art to the performance attenuation of the fuel cell is poor, the output of the fuel cell cannot be adjusted and controlled to be in a target state, and certain risks exist for the safety of the fuel cell.
Disclosure of Invention
The application provides a control parameter regulation and control method and a control parameter regulation and control system for a fuel cell system, which can solve the technical problem that the adaptability of control parameter regulation to the whole life cycle of the fuel cell system in the prior art is poor.
In a first aspect, an embodiment of the present application provides a control parameter adjusting and controlling method for a fuel cell system, including:
in a life starting BOL state, collecting a pile current when the pile voltage meets a reference voltage as a reference current;
in the running state, collecting the pile voltage every time the pile current reaches the reference current, and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate;
and in the time period between the pile current reaching the reference current twice, collecting the pile current, inquiring the association relation to obtain a theoretical control parameter, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
With reference to the first aspect, in one embodiment, the method includes:
and calculating the target control parameters for each single battery in the fuel cell system, and adjusting actual control parameters according to the calculated target control parameters.
With reference to the first aspect, in an implementation manner, the control parameter includes:
flow, temperature, pressure, and excess factor for the air system and the hydrogen system; and
flow, temperature, and pressure for the cooling system.
With reference to the first aspect, in one embodiment, the reference voltage is 0.7V.
With reference to the first aspect, in one implementation manner, the stack voltage is collected when the stack current reaches the reference current, and the battery attenuation rate is obtained by calculating the stack voltage and the reference voltage, which specifically includes the following steps:
when the pile current reaches the reference current, collecting all pile voltages when the pile current keeps the reference current, calculating a voltage average value, and calculating the average value and the reference voltage to obtain the battery attenuation rate.
With reference to the first aspect, in one embodiment, the battery attenuation rate is calculated using the following formula:
wherein,
n is used for indicating the times of reaching the reference current after the galvanic pile passes through the BOL state and starts to operate, and n is a positive integer;
P n the battery attenuation rate is used for representing the battery attenuation rate of the electric pile when the nth time reaches the reference current;
vs is used to represent a reference voltage;
V n for representing the stack voltage at the nth time when the reference current is reached.
In a second aspect, an embodiment of the present application provides a control parameter regulation system for a fuel cell system, the system including:
the reference current acquisition module is used for acquiring the pile current when the pile voltage meets the reference voltage as the reference current in the life-span initial BOL state;
the attenuation rate calculation module is used for collecting the pile voltage every time the pile current reaches the reference current in the running state, and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate;
the control parameter adjustment module is used for collecting the pile current in a time period between the pile current reaching the reference current twice, obtaining a theoretical control parameter by inquiring the association relation, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
With reference to the second aspect, in one embodiment, the control parameter adjustment module is configured to calculate the target control parameter for each unit cell in the fuel cell system, and adjust the actual control parameter according to the calculated target control parameter.
With reference to the second aspect, in one embodiment, the control parameter includes:
flow, temperature, pressure, and excess factor for the air system and the hydrogen system; and
flow, temperature, and pressure for the cooling system;
the reference voltage is 0.7V.
With reference to the second aspect, in one embodiment, the control parameter adjustment module collects all pile voltages when the pile current reaches the reference current and maintains the reference current, calculates a voltage average value, and calculates the average value and the reference voltage to obtain the battery attenuation rate.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
in the BOL state, the pile current when the pile voltage meets the reference voltage is collected as the reference current, in the subsequent operation state of the fuel cell system, the pile voltage is collected every time the pile current reaches the reference current, and the cell attenuation rate when the pile current reaches the reference current is obtained according to the comparison result of the pile voltage and the reference voltage. And in the time period between the two times of reaching the reference current, inquiring a preset association relation according to the real-time pile current to obtain a theoretical control parameter, correcting the parameter according to the battery attenuation rate to obtain a target control parameter which accords with the attenuation condition of the battery system, and adjusting the actual control parameter to be consistent with the target control parameter. The application selects the reference current point to collect the pile voltage to calculate the attenuation rate based on the existing input-output association relation of the fuel cell system, corrects the control parameter control target according to the attenuation rate, improves the control accuracy and the battery safety, and solves the technical problem of poor adaptability of the control parameter adjustment to the whole life cycle of the fuel cell system in the related technology.
Drawings
FIG. 1 is a graph showing characteristics of BOL and EOL of a fuel cell;
FIG. 2 is a flow chart of an embodiment of a method for controlling parameters of a fuel cell system according to the present application;
fig. 3 is a schematic functional block diagram of an embodiment of a control parameter adjusting system for a fuel cell system according to the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In describing embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that the operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
First, some technical terms in the present application are explained so as to facilitate understanding of the present application by those skilled in the art.
Pile: the fuel cell stack is simply called a stack in which a plurality of unit cells are stacked in series.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
In a first aspect, an embodiment of the present application provides a method and a system for online adaptive regulation and control of control parameters for a full life cycle of a fuel cell system.
In an embodiment, referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of a control parameter adjusting method for a fuel cell system according to the present application. As shown in fig. 1, the control parameter regulation method for the fuel cell system includes:
and S1, under the life starting BOL state, collecting the pile current when the pile voltage meets the reference voltage as the reference current.
And S2, under the running state, collecting the pile voltage every time the pile current reaches the reference current, and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate.
And S3, collecting the pile current in a time period between the pile current and the reference current twice, inquiring the association relation to obtain a theoretical control parameter, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
In this embodiment, the stack current when the stack voltage satisfies the reference voltage is collected as the reference current in the BOL state, and the stack voltage is collected each time the stack current reaches the reference current in the operation state of the subsequent fuel cell system, and the battery attenuation rate when the current stack current reaches the reference current is obtained according to the comparison result of the stack voltage and the reference voltage. And in the time period between the two times of reaching the reference current, inquiring a preset association relation according to the real-time pile current to obtain a theoretical control parameter, correcting the parameter according to the battery attenuation rate to obtain a target control parameter which accords with the attenuation condition of the battery system, and adjusting the actual control parameter to be consistent with the target control parameter. The application selects the reference current point to collect the pile voltage to calculate the attenuation rate based on the existing input-output association relation of the fuel cell system, corrects the control parameter control target according to the attenuation rate, improves the control accuracy and the battery safety, and solves the technical problem of poor adaptability of the control parameter adjustment to the whole life cycle of the fuel cell system in the related technology.
Further, in an embodiment, the method includes:
the target control parameters are calculated for each unit cell in the fuel cell system, and the actual control parameters are adjusted according to the calculated target control parameters.
In this embodiment, since the stack is formed by stacking and combining a plurality of unit cells in a serial manner, the current of all the unit cells is consistent and is the stack current, but the stack voltage is generally not the voltage of all the unit cells, after the BOL state is passed, the attenuation conditions of different unit cells may be different, so the actual voltages of different unit cells are different, in the prior art, the attenuation conditions of the fuel cells are not considered, the default stack voltage is the voltage of all the unit cells, when the voltage is adjusted according to the output feedback, the preset association relationship is queried according to the current and the voltage of the whole stack, the voltage adjustment target of the whole stack is obtained, the adjustment precision is lower due to the fact that the voltage attenuation conditions cannot be adapted, and the control parameter adjustment cannot be flexibly performed for each unit cell, for example, the hydrogen flow and the temperature, the oxygen flow and the temperature of different unit cells cannot be flexibly adjusted.
And in the operation process of the fuel cell system, the pile voltage is collected every time the pile current accords with the reference current, the pile voltage data can comprise the voltage data of each single cell, and the voltage data of each single cell can be obtained by using an on-line single-chip voltage inspection instrument. When the attenuation rate of each single battery is calculated, the calculation can be carried out according to the reference voltage and the real-time voltage data of the reference voltage to obtain the battery attenuation rate of each single battery, then the input-output relation of the fuel cell system is inquired according to the current of the electric pile to obtain a theoretical control parameter, then different single batteries need to correct the inquired theoretical control parameter by utilizing different attenuation rates, so that the target control parameter conforming to the attenuation condition of each single battery is obtained, then the actual control parameter of each single battery is compared with the target control parameter thereof, and according to the comparison result, if the comparison result is inconsistent, the actual control parameter is adjusted to be consistent with the target control parameter, so that the control parameter of each single battery can be accurately adjusted, the adjusting precision of the control parameter is improved, the use safety of the battery is improved, and the adjustment of the control parameter is adapted to the actual working condition of the attenuation of the battery.
Further, in an embodiment, the battery attenuation rate is calculated by the following formula (1):
wherein n is used for indicating the times of reaching the reference current after the pile passes through the BOL state and starts to operate, and n is a positive integer. P (P) n For indicating the battery decay rate of the stack when the nth time reaches the reference current. V (V) s For representing the reference voltage. V (V) n For representing the stack voltage at the nth time when the reference current is reached.
In a specific embodiment, when the temperature control parameter of the cooling system is adjusted, the real-time voltage of the single battery which needs to be adjusted by the temperature control parameter is collected by the single-chip voltage inspection instrument, the performance attenuation percentage P0 of the single battery is calculated according to the formula (1), and then the attenuation influence factor P0 is added into the temperature control parameter adjustment strategy.
Specifically, as the fuel cell system is used, the stack cell voltage εcell at the same stack current point continuously drops. As can be seen from the fact that the stack heat Qstack= (ε 0- ε cell) xIxN/1000, the stack heat generation amount continuously increases. For a commercial vehicle equipped with a rated power 120kw fuel cell system, the control flow using the conventional method is as follows at the middle point of the life cycle of the fuel cell system, i.e., when the performance is attenuated by 10%:
at a rated power of 120kw, the table lookup calculates the system heat generation q0=150 kw. At this time, according to q0=150 kw, the fan rotation speed percentage p1=40% is set. Then PID closed-loop control is started to enable the temperature of the inlet of the electric pile to reach a target value: t0=70℃. However, due to the degradation of the performance of the fuel cell system, the actual amount of generated heat at this time is more than q1=12 kw, and the actual total amount of generated heat is q2=162 kw;
since the calculated fan speed target is 150kw, there is a shock in the fan PID control due to the 12kw error.
After the method is introduced, the attenuation of the fuel cell system is detected and calculated by the on-line single-chip voltage inspection instrument, so that the attenuation is input to the temperature control system. The target heat dissipation capacity of the temperature control system is corrected to be q2=162 kw; through real-time calculation feedback, the fan rotating speed target is 162kw, and the oscillation of fan feedback control is reduced, so that the stability of the thermal management control of the fuel cell system is optimized and improved.
In a second aspect, the embodiment of the application further provides a control parameter regulation system for the fuel cell system.
In an embodiment, referring to fig. 3, fig. 3 is a schematic functional block diagram of an embodiment of a control parameter adjusting system for a fuel cell system according to the present application. As shown in fig. 3, the control parameter regulation system for a fuel cell system includes:
and a reference current acquisition module 1 for acquiring, as a reference current, a pile current at which the pile voltage satisfies the reference voltage in the life-start BOL state.
And the attenuation rate calculation module 2 is used for collecting the pile voltage every time the pile current reaches the reference current in the running state and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate.
And the control parameter adjustment module 3 is used for acquiring the pile current in the time period between the pile current reaching the reference current twice, obtaining a theoretical control parameter by inquiring the association relation, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
In this embodiment, the stack current when the stack voltage satisfies the reference voltage is collected as the reference current in the BOL state, and the stack voltage is collected each time the stack current reaches the reference current in the operation state of the subsequent fuel cell system, and the battery attenuation rate when the current stack current reaches the reference current is obtained according to the comparison result of the stack voltage and the reference voltage. And in the time period between the two times of reaching the reference current, inquiring a preset association relation according to the real-time pile current to obtain a theoretical control parameter, correcting the parameter according to the battery attenuation rate to obtain a target control parameter which accords with the attenuation condition of the battery system, and adjusting the actual control parameter to be consistent with the target control parameter. The application selects the reference current point to collect the pile voltage to calculate the attenuation rate based on the existing input-output association relation of the fuel cell system, corrects the control parameter control target according to the attenuation rate, improves the control accuracy and the battery safety, and solves the technical problem of poor adaptability of the control parameter adjustment to the whole life cycle of the fuel cell system in the related technology.
Further, in an embodiment, the control parameter adjustment module 3 is configured to calculate the target control parameter for each unit cell in the fuel cell system, and adjust the actual control parameter according to the calculated target control parameter.
In this embodiment, since the stack is formed by stacking and combining a plurality of unit cells in a serial manner, the current of all the unit cells is consistent and is the stack current, but the stack voltage is generally not the voltage of all the unit cells, after the BOL state is passed, the attenuation conditions of different unit cells may be different, so the actual voltages of different unit cells are different, in the prior art, the attenuation conditions of the fuel cells are not considered, the default stack voltage is the voltage of all the unit cells, when the voltage is adjusted according to the output feedback, the preset association relationship is queried according to the current and the voltage of the whole stack, the voltage adjustment target of the whole stack is obtained, the adjustment precision is lower due to the fact that the voltage attenuation conditions cannot be adapted, and the control parameter adjustment cannot be flexibly performed for each unit cell, for example, the hydrogen flow and the temperature, the oxygen flow and the temperature of different unit cells cannot be flexibly adjusted.
And in the operation process of the fuel cell system, the pile voltage is collected every time the pile current accords with the reference current, the pile voltage data can comprise the voltage data of each single cell, and the voltage data of each single cell can be obtained by using an on-line single-chip voltage inspection instrument. When the attenuation rate of each single battery is calculated, the calculation can be carried out according to the reference voltage and the real-time voltage data of the reference voltage to obtain the battery attenuation rate of each single battery, then the input-output relation of the fuel cell system is inquired according to the current of the electric pile to obtain a theoretical control parameter, then different single batteries need to correct the inquired theoretical control parameter by utilizing different attenuation rates, so that the target control parameter conforming to the attenuation condition of each single battery is obtained, then the actual control parameter of each single battery is compared with the target control parameter thereof, and according to the comparison result, if the comparison result is inconsistent, the actual control parameter is adjusted to be consistent with the target control parameter, so that the control parameter of each single battery can be accurately adjusted, the adjustment precision of the control parameter is improved, the use safety of the battery is improved, and the adjustment of the control parameter is adapted to the actual working condition of the attenuation of the battery.
Further, in an embodiment, the control parameter adjustment module 3 collects all pile voltages when the pile current reaches the reference current and maintains the reference current, calculates a voltage average value, and calculates the voltage average value and the reference voltage to obtain the battery attenuation rate.
The function implementation of each module in the control parameter adjusting and controlling system for the fuel cell system corresponds to each step in the embodiment of the control parameter adjusting and controlling method for the fuel cell system, and the function and implementation process thereof are not described in detail herein.
In a third aspect, an embodiment of the present application provides a control parameter adjustment and control apparatus for a fuel cell system, where the control parameter adjustment and control for the fuel cell system may be an apparatus having a data processing function, such as a personal computer (personal computer, PC), a notebook computer, a server, or the like.
The control parameter regulating device for the fuel cell system may include a processor, a memory, a communication interface, and a communication bus.
The communication bus may be of any type for implementing the processor, memory, and communication interface interconnections.
Communication interfaces include input/output (I/O) interfaces, physical interfaces, logical interfaces, and the like for implementing device interconnections within an AAAA device, as well as interfaces for implementing interconnection of an AAAA device with other devices (e.g., other computing devices or user devices). The physical interface may be an ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device may be a Display, a Keyboard (Keyboard), or the like.
The memory may be various types of storage media such as random access memory (randomaccess memory, RAM), read-only memory (ROM), nonvolatile RAM (non-volatileRAM, NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (electrically erasable PROM, EEPROM), and the like.
The processor may be a general-purpose processor, and the general-purpose processor may call an AAAA program stored in the memory and execute the AAAA method provided by the embodiment of the present application. For example, the general purpose processor may be a central processing unit (central processing unit, CPU). The method executed when the control parameter adjusting and controlling program for the fuel cell system is called may refer to various embodiments of the control parameter adjusting and controlling method for the fuel cell system according to the present application, and will not be described herein.
In a fourth aspect, embodiments of the present application also provide a readable storage medium.
The readable storage medium of the present application stores a control parameter adjusting program for a fuel cell system, wherein the control parameter adjusting program for the fuel cell system, when executed by a processor, implements the steps of the control parameter adjusting method for the fuel cell system as described above.
The method implemented when the control parameter adjusting and controlling program for the fuel cell system is executed may refer to various embodiments of the control parameter adjusting and controlling method for the fuel cell system according to the present application, which are not described herein.
It should be noted that, the foregoing reference numerals of the embodiments of the present application are merely for describing the embodiments, and do not represent the advantages and disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A control parameter regulation method for a fuel cell system, the method comprising:
in a life starting BOL state, collecting a pile current when the pile voltage meets a reference voltage as a reference current;
in the running state, collecting the pile voltage every time the pile current reaches the reference current, and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate;
and in the time period between the pile current reaching the reference current twice, collecting the pile current, inquiring the association relation to obtain a theoretical control parameter, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
2. The control parameter regulating method for a fuel cell system according to claim 1, characterized in that the method comprises:
and calculating the target control parameters for each single battery in the fuel cell system, and adjusting actual control parameters according to the calculated target control parameters.
3. The control parameter regulating method for a fuel cell system according to claim 1, wherein the control parameter includes:
flow, temperature, pressure, and excess factor for the air system and the hydrogen system; and
flow, temperature, and pressure for the cooling system.
4. The control parameter adjusting and controlling method for a fuel cell system according to claim 1, wherein the reference voltage is 0.7V.
5. The control parameter adjusting and controlling method for a fuel cell system according to claim 1, wherein the stack voltage is collected when the stack current reaches the reference current, and the battery decay rate is obtained by calculating the stack voltage and the reference voltage, comprising the steps of:
when the pile current reaches the reference current, collecting all pile voltages when the pile current keeps the reference current, calculating a voltage average value, and calculating the average value and the reference voltage to obtain the battery attenuation rate.
6. The control parameter regulating method for a fuel cell system according to claim 1, wherein the battery decay rate is calculated using the following formula:
wherein,
n is used for indicating the times of reaching the reference current after the galvanic pile passes through the BOL state and starts to operate, and n is a positive integer;
P n the battery attenuation rate is used for representing the battery attenuation rate of the electric pile when the nth time reaches the reference current;
vs is used to represent a reference voltage;
V n for representing the stack voltage at the nth time when the reference current is reached.
7. A control parameter regulation system for a fuel cell system, the system comprising:
the reference current acquisition module is used for acquiring the pile current when the pile voltage meets the reference voltage as the reference current in the life-span initial BOL state;
the attenuation rate calculation module is used for collecting the pile voltage every time the pile current reaches the reference current in the running state, and calculating the pile voltage and the reference voltage to obtain the battery attenuation rate;
the control parameter adjustment module is used for collecting the pile current in a time period between the pile current reaching the reference current twice, obtaining a theoretical control parameter by inquiring the association relation, correcting the theoretical control parameter according to the battery attenuation rate to obtain a target control parameter, comparing the target control parameter with an actual control parameter, and adjusting the actual control parameter to be consistent with the target control parameter when the comparison result is inconsistent.
8. The control parameter tuning system for a fuel cell system according to claim 7, wherein the control parameter adjustment module is configured to calculate the target control parameter for each unit cell in the fuel cell system, and adjust the actual control parameter according to the calculated target control parameter.
9. The control parameter tuning system for a fuel cell system as defined in claim 7, wherein the control parameters include:
flow, temperature, pressure, and excess factor for the air system and the hydrogen system; and
flow, temperature, and pressure for the cooling system;
the reference voltage is 0.7V.
10. The control parameter regulating system for a fuel cell system according to claim 7, wherein the control parameter adjusting module collects all stack voltages when the stack current reaches the reference current and holds the reference current, calculates a voltage average value, and calculates a battery decay rate from the average value and the reference voltage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117712431A (en) * | 2024-02-05 | 2024-03-15 | 中汽研新能源汽车检验中心(天津)有限公司 | Fuel cell system life optimization method and system based on thermoelectric ratio regulation and control constraint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117712431A (en) * | 2024-02-05 | 2024-03-15 | 中汽研新能源汽车检验中心(天津)有限公司 | Fuel cell system life optimization method and system based on thermoelectric ratio regulation and control constraint |
| CN117712431B (en) * | 2024-02-05 | 2024-04-16 | 中汽研新能源汽车检验中心(天津)有限公司 | Fuel cell system life optimization method and system based on thermoelectric ratio regulation and control constraint |
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