CN115303133A - Multi-gear hysteresis control method and system for fuel cell system - Google Patents
Multi-gear hysteresis control method and system for fuel cell system Download PDFInfo
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- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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Abstract
The invention belongs to the field of fuel cell system control, and provides a multi-gear hysteresis control method and a system of a fuel cell system, which acquire a power cell SOC value of a cell management system; when a signal allowing the fuel cell system to generate power is received, determining an operating power point of the fuel cell by utilizing the power multi-gear and hysteresis principle of the power cell SOC value according to the acquired cell SOC value; and controlling the output power of the fuel cell according to the determined fuel cell operation power point. The control method can maintain the SOC of the power battery in a smaller interval in the running process of the fuel battery vehicle, ensure less power variable load points of the fuel battery, reduce the hydrogen consumption of the whole vehicle and prolong the service life of the fuel battery.
Description
Technical Field
The invention belongs to the technical field of fuel cell system control, and particularly relates to a multi-gear hysteresis control method and a multi-gear hysteresis control system for a fuel cell system.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
At present, most of fuel cell passenger cars are electric-electric hybrid power systems, namely, a power cell and a fuel cell are used as energy sources together to supply power to a motor to drive a vehicle to move. However, the inventors have found that fuel cell vehicles run at high hydrogenation costs, up to 70 yuan/kg. In addition, fuel cell systems are expensive, up to 5000 yuan/KW, and their life affects fuel cell vehicle operating costs. The operation power of the fuel cell system responds to the power request of the vehicle controller, and the power request control strategy of the vehicle controller to the fuel cell system is closely related to the vehicle hydrogen consumption of the fuel cell vehicle and the service life of the fuel cell system.
That is, the control method of the existing fuel cell system cannot maintain the cell in a small interval, which results in serious hydrogen consumption of the whole vehicle and reduced service life of the fuel cell.
Disclosure of Invention
In order to solve the problems, the invention provides a multi-gear hysteresis control method and a multi-gear hysteresis control system for a fuel cell system, which can maintain the SOC of a power battery in a smaller interval in the running process of a fuel cell vehicle, ensure fewer power variable load points of the fuel cell, reduce the hydrogen consumption of the whole vehicle and prolong the service life of the fuel cell.
According to some embodiments, a first aspect of the present invention provides a multi-gear hysteresis control method for a fuel cell system, which adopts the following technical solutions:
a multi-gear hysteresis control method of a fuel cell system comprises the following steps:
collecting a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, determining an operating power point of the fuel cell by utilizing the power multi-gear and hysteresis principle of the power cell SOC value according to the acquired cell SOC value;
and controlling the output power of the fuel cell according to the determined fuel cell operation power point.
Further, the fuel cell system is connected with the battery management system, the vehicle control unit and the fuel system controller through a CAN network;
when the key electric signal is in an ON gear, the vehicle control unit acquires an SOC value sent by the battery management system.
Further, the determining the operating power point of the fuel cell by using the principle of power multi-gear and hysteresis of the power battery SOC value according to the collected battery SOC value includes:
determining the SOC partition interval of the battery based on the rated power of the engine of the whole vehicle;
determining the control gear number of the fuel cell according to the battery SOC division interval;
the power request of the fuel cell is changed in steps of A% of rated power of the fuel cell according to the SOC division interval;
determining a fuel cell control gear corresponding to the acquired cell SOC value according to the relation between the SOC division areas and the fuel cell control gear;
and determining a power request point of the corresponding vehicle control unit by combining the SOC interval of the hysteresis power battery according to the determined control gear of the fuel battery.
Furthermore, the division of the fuel cell control gear is determined according to the size N of the SOC interval of each gear, wherein N is more than or equal to 8.
Furthermore, the size F of the SOC interval of the hysteresis power battery is determined according to the number of the divided fuel battery control gears and the rated power of the fuel battery system, and F is larger than or equal to 8.
Further, the battery SOC partition interval is 0-90%.
Further, controlling the output power of the fuel cell according to the determined operating power point of the fuel cell, specifically:
after the whole vehicle controller determines the operating power point of the fuel cell, the operating power point is set through a communication protocol and sent to the CAN bus in a message form;
the fuel cell system controller receives the message through the CAN bus and responds to the requested power sent by the vehicle controller.
According to some embodiments, a second aspect of the present invention provides a multi-gear hysteresis control system for a fuel cell system, which adopts the following technical solutions:
a multi-gear hysteresis control system of a fuel cell system comprises a vehicle control unit, a battery management system and a fuel cell system controller; wherein the content of the first and second substances,
the vehicle control unit acquires a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, the vehicle control unit determines an operation power point of the fuel cell according to the acquired battery SOC value and by utilizing the power multi-gear and hysteresis principle of the power battery SOC value, and sends the determined operation power point of the fuel cell to the fuel cell system controller;
and the fuel cell system controller controls the output power of the fuel cell according to the determined fuel cell operation power point.
According to some embodiments, a third aspect of the invention provides a computer-readable storage medium.
A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of a fuel cell system multi-stage hysteresis control method as described in the first aspect above.
According to some embodiments, a fourth aspect of the invention provides a computer apparatus.
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 steps in a fuel cell system multi-stage hysteresis control method as described in the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a hysteresis control mode to maintain the SOC of the power battery in a smaller interval in the running process of the fuel battery vehicle, ensures less power variable load points of the fuel battery, reduces the hydrogen consumption of the whole vehicle and prolongs the service life of the fuel battery.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a flowchart of a multi-stage hysteresis control method of a fuel cell system according to an embodiment of the present invention;
fig. 2 is a process diagram of multi-stage hysteresis control of a fuel cell system according to an embodiment of the present invention;
FIG. 3 is a process diagram of multi-gear hysteresis control of an 80kW engine according to the embodiment of the invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The noun interpretation: battery SOC (stateoff charge), i.e. state of charge.
Example one
As shown in fig. 1, the present embodiment provides a multi-stage hysteresis control method of a fuel cell system. In this embodiment, the method includes the steps of:
collecting a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, determining an operating power point of the fuel cell by utilizing a power multi-gear hysteresis principle of a power cell SOC value according to the acquired cell SOC value;
and controlling the output power of the fuel cell according to the determined fuel cell operation power point.
(1) Collecting an SOC value of a power battery;
the key electric signal is divided into three signals of OFF, ON and Start, when the key electric signal is in ON gear, the whole vehicle controller, the battery management system and the fuel cell system controller CAN normally send and receive messages, and signal interaction is carried out among the controllers through a CAN network architecture. And the vehicle control unit sets and acquires an SOC value sent by the battery management system according to the communication protocol.
(2) Determining a fuel cell power point according to the power cell SOC value;
the method for determining the operating power point of the fuel cell by utilizing the power multi-gear and hysteresis principles of the power battery SOC value according to the collected battery SOC value comprises the following steps:
determining the SOC partition interval of the battery based on the rated power of the engine of the whole vehicle;
determining the control gear number of the fuel cell according to the battery SOC division interval;
the power request of the fuel cell is changed in steps of A% of rated power of the fuel cell according to the SOC division interval;
wherein the power request is a power request to a fuel cell.
Pace change interpretation:
taking the hysteresis of the 9 gears as an example, the step change is 8KW, namely 72-64=8;64-56=8.
1, gear: when the SOC is less than 10%, the target power is 72kW;
5% hysteresis: when the SOC is less than 15%, taking the target power of 72kW;
2, gear: when the SOC is more than or equal to 10% and less than 20%, the target power is 64kW;
5% hysteresis: when the SOC is less than 25%, the target power is 64kW;
3, gear 3: when the SOC is more than or equal to 20% and less than 30%, the target power is 56kW;
5% hysteresis: when the SOC is less than 35%, taking 56kW of target power;
4, gear 4: when the SOC is more than or equal to 30% and less than 40%, the target power is 48kW;
5% hysteresis: when the SOC is less than 45%, the target power is 48kW;
5, gear: when the SOC is more than or equal to 40% and less than 50%, the target power is 40kW;
5% hysteresis: when the SOC is less than 55%, taking target power 40kW;
6, gear 6: when the SOC is more than or equal to 50% and less than 60%, the target power is 32kW;
5% hysteresis: when the SOC is less than 65%, taking the target power of 32kW;
7, gear: when the SOC is more than or equal to 60% and less than 70%, the target power is 24kW;
5% hysteresis: when the SOC is less than 75%, taking the target power of 24kW;
and 8, gear: when the SOC is more than or equal to 70% and less than 80%, the target power is 16kW;
5% hysteresis: when the SOC is less than 85%, the target power is 16kW;
9, gear: when the SOC is more than or equal to 80% and less than 90%, the target power is 10kW.
Determining a fuel cell control gear corresponding to the acquired cell SOC value according to the relation between the SOC division areas and the fuel cell control gear;
and determining a power request point of the corresponding vehicle control unit by combining the SOC interval of the hysteresis power battery according to the determined control gear of the fuel battery.
Wherein, the specific use process of hysteresis interval includes:
explaining according to a multi-gear hysteresis 80KW as an example, if the SOC of a power battery is 45%, the whole vehicle controller requests with target power being 40KW, if the requested power of 40KW is not enough to meet the average power requirement of the working condition of the whole vehicle, the SOC of the power battery gradually decreases, when the SOC of the power battery decreases to 40%, the requested power of the whole vehicle controller is 48KW, if the requested power of 48KW is larger than the average power requirement of the working condition of the whole vehicle, the SOC of the power battery gradually increases, when the SOC of the power battery increases to more than 40%, the requested power of the whole vehicle controller cannot immediately become 40KW, and when the SOC of the power battery increases to 45%, the requested power of the whole vehicle controller can become 40KW.
That is to say, the embodiment adopts the effect of hysteresis loop, prevents the SOC of the power battery from frequently fluctuating around 40%, which causes frequent change of the requested power of the fuel battery, and improves the service life of the fuel battery.
Specifically, as shown in FIG. 2, the fuel cell control gear division depends on the size N of the SOC interval of each gear, wherein N is more than or equal to 8. The size F of the SOC interval of the hysteresis power battery is determined according to the number of the divided fuel battery control gears and the rated power of the fuel battery system, and F is more than or equal to 8. The battery SOC division interval is 0-90%, it should be noted that the battery SOC division interval is a range from 0 to 90%, the first gear division may be less than 10%, or may be divided into other ranges according to actual needs, and the minimum is not 0.
Specifically, the key is turned to a start signal, the voltage on the whole vehicle is high, and the meter displays ready. When the fuel cell system is allowed to generate power, the FCV/EV shift switch is turned on, the vehicle controller determines the power point of the fuel cell operation according to the collected SOC value, as shown in FIG. 1, the SOC division interval of the power cell is 0-90%, the gear division quantity is determined according to the size N of each gear SOC interval, N is more than or equal to 8, the initial SOC interval is assumed to be SOC less than or equal to M%, and so on, the divided SOC intervals are respectively M% < SOC less than or equal to (M + N)%, (M + N)% < SOC less than or equal to (M + 2N)%, (M + (x-1) N) < SOC less than or equal to (M + xN)%, and the interval ends until the (M + xN)% < SOC less than or equal to 90%.
The power request is changed in a pace of A% of rated power of the fuel cell according to the SOC interval, wherein A is more than or equal to 8.
Assuming that the rated power of the fuel cell system is B (in KW), the maximum requested power is C (in KW), the requested power point corresponding to SOC not more than M% is C, and so on, the power request points corresponding to M% < SOC not more than (M + N)%, (M + N) < SOC not more than (M + 2N)%. -%, (M + (x-1) N)% < SOC not more than (M + xN)% are respectively C-B, C-B2A%.. C-B, and until (M + xN)% < SOC not more than 90% reaches the minimum requested power point D.
In the actual running process of the vehicle, in order to prevent the power of the fuel cell system from being frequently changed in load, the SOC interval of the hysteresis power cell is F%, F is more than or equal to 4, namely if the power request point corresponding to the condition that M% is more than SOC is less than or equal to (M + N)% is C-B A%, and if the C-B A% is more than the average power requirement of the working condition of the whole vehicle, the SOC can be gradually increased. When SOC is > (M + N)%, i.e., SOC interval is (M + N)% < SOC ≦ M + 2N)%, the corresponding requested power point is still maintained at C-B × A%, and until SOC > (M + N + F)%, i.e., SOC interval is (M + N + F)% < SOC ≦ M + 2N)%, the corresponding requested power point becomes C-B2A%. If C-B2A% is smaller than the average power demand of the whole vehicle working condition, the SOC is gradually reduced. When SOC is less than (M + N + F%), the corresponding requested power point remains C-B2A%, and until SOC is less than (M + N%), the corresponding requested power point becomes C-B a%. By the multi-gear hysteresis control method of the fuel cell system, frequent load change of the requested power of the fuel cell can be prevented, and the service life of the fuel cell can be prolonged.
As shown in fig. 3, taking an 80KW engine as an example, a 9-gear hysteresis control strategy is adopted, the SOC division interval of the power battery is 0-95%, the size of each SOC interval is 10%, the power request changes in steps of 10% of rated power of the fuel battery according to the SOC interval, the larger the SOC is, the smaller the corresponding power request is, the power value of each SOC interval is constant, and the SOC interval of the hysteresis power battery is 5%.
If power battery SOC is 45%, vehicle control unit uses the target power to carry out the request for 40KW, if 40 KW's requested power is not enough to satisfy whole car operating mode average power demand, power battery SOC will step down, when power battery SOC drops to 40%, vehicle control unit requested power is 48KW, if 48 KW's requested power is greater than whole car operating mode average power demand, power battery SOC rises step by step, when power battery SOC rises to more than 40%, vehicle control unit requested power can not stand immediately and become 40KW, but when power battery SOC rises to 45%, vehicle control unit requested power just can become 40KW.
This means that the hysteresis interval relating to the SOC of one power cell is 5%, preventing frequent load changes of the power requested by the fuel cell.
(3) And controlling the output power of the fuel cell according to the determined power point of the fuel cell.
After the vehicle controller determines the operating power point of the fuel cell, the operating power point is sent to the CAN bus in a message form through communication protocol setting, and the fuel cell system controller receives the message and responds to the request power sent by the vehicle controller.
The embodiment adopts a hysteresis control mode to maintain the SOC of the power battery in a smaller interval during the running process of the fuel cell vehicle, and the more the control gear is divided, the thinner the SOC of the power battery is divided.
If for 5 gears (as follows): the SOC interval of the power battery is divided into 20%, and the hysteresis interval is set to be 10%.
1, gear 1: when the SOC is less than 10%, the target power is 72kw;
10% hysteresis: when the SOC is less than 20%, the target power is 72kw;
2, gear: when the SOC is more than or equal to 10% and less than 30%, the target power is 64kw;
10% hysteresis: when the SOC is less than 40%, the target power is 64kw;
3, gear 3: when the SOC is more than or equal to 30% and less than 50%, the target power is 56kw;
10% hysteresis: when the SOC is less than 60%, the target power is 56kw;
4, gear 4: when the SOC is more than or equal to 60% and less than 70%, the target power is 32kw;
10% hysteresis: when the SOC is less than 80%, the target power is 32kw;
5, gear: when the SOC is more than or equal to 70% and less than 90%, the target power is 16kw;
if for 9 gears (as follows): the SOC interval of the power battery is divided into 10%, and the hysteresis interval is set to be 5%.
1, gear: when the SOC is less than 10%, the target power is 72kW;
5% hysteresis: when the SOC is less than 15%, taking the target power of 72kW;
2, gear: when the SOC is more than or equal to 10% and less than 20%, the target power is 64kW;
5% hysteresis: when the SOC is less than 25%, the target power is 64kW;
3, gear 3: when the SOC is more than or equal to 20% and less than 30%, the target power is 56kW;
5% hysteresis: when the SOC is less than 35%, taking 56kW of target power;
4, gear 4: when the SOC is more than or equal to 30% and less than 40%, the target power is 48kW;
5% hysteresis: when the SOC is less than 45%, the target power is 48kW;
5, gear: when the SOC is more than or equal to 40% and less than 50%, the target power is 40kW;
5% hysteresis: when the SOC is less than 55%, taking target power 40kW;
6, gear 6: when the SOC is more than or equal to 50% and less than 60%, the target power is 32kW;
5% hysteresis: when the SOC is less than 65%, taking the target power of 32kW;
7, gear: when the SOC is more than or equal to 60% and less than 70%, the target power is 24kW;
5% hysteresis: when the SOC is less than 75%, the target power is taken to be 24kW;
and 8, gear: when the SOC is more than or equal to 70% and less than 80%, the target power is 16kW;
5% hysteresis: when the SOC is less than 85%, the target power is 16kW;
9, gear: when the SOC is more than or equal to 80% and less than 90%, the target power is 10kW.
During operation of a fuel cell vehicle, there is always an average value of the power required for the operating conditions. When the vehicle runs for a long time, the SOC interval of the power battery is always stabilized in the SOC interval corresponding to the average value of the power required by the running working condition (namely, the divided interval of the control strategy), and the finer the SOC interval is, the smaller the interval maintained by the SOC of the power battery in the running process of the vehicle is.
In addition, in the running process of the whole vehicle, the power source has two parts, the power battery directly drives and the electricity generated by the fuel battery directly drives, if the electricity generated by the fuel battery is larger than that used by the whole vehicle, the redundant electricity generated can be recharged for the power battery. If the electricity generated by the fuel cell is discharged after charging the power battery, a part of the energy loss occurs, in other words, the hydrogen consumption of the whole vehicle is increased.
In addition, according to the explanation of the multi-gear hysteresis loop 80KW, if the power battery SOC is 45%, the vehicle control unit requests 40KW of target power, if the requested power of 40KW is not enough to meet the average power requirement of the working condition of the entire vehicle, the power battery SOC gradually decreases, when the power battery SOC decreases to 40%, the requested power of the vehicle control unit is 48KW, if the requested power of 48KW is greater than the average power requirement of the working condition of the entire vehicle, the power battery SOC gradually increases, when the power battery SOC increases to more than 40%, the requested power of the vehicle control unit does not immediately change to 40KW, but when the power battery SOC increases to 45%, the requested power of the vehicle control unit changes to 40KW. The hysteresis process prevents frequent overloading of the fuel cell.
Example two
The embodiment provides a multi-gear hysteresis control system of a fuel cell system, which comprises a vehicle control unit, a battery management system and a fuel cell system controller; wherein, the first and the second end of the pipe are connected with each other,
the vehicle control unit acquires a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, the vehicle control unit determines an operation power point of the fuel cell according to the acquired battery SOC value and by utilizing the power multi-gear and hysteresis principle of the power battery SOC value, and sends the determined operation power point of the fuel cell to the fuel cell system controller;
and the fuel cell system controller controls the output power of the fuel cell according to the determined operating power point of the fuel cell.
The modules are the same as the corresponding steps in the implementation example and application scenarios, but are not limited to the disclosure of the first embodiment. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer executable instructions.
In the foregoing embodiments, the descriptions of the embodiments have different emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The proposed system can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the above-described modules is merely a logical functional division, and in actual implementation, there may be another division, for example, a plurality of modules may be combined or may be integrated into another system, or some features may be omitted, or not executed.
EXAMPLE III
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps in a multi-gear hysteresis control method of a fuel cell system as described in the first embodiment above.
Example four
The present embodiment provides a computer device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the multi-step hysteresis control method of the fuel cell system as described in the first embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A multi-gear hysteresis control method of a fuel cell system is characterized by comprising the following steps:
collecting a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, determining an operating power point of the fuel cell by utilizing a power multi-gear hysteresis principle of a power cell SOC value according to the acquired cell SOC value;
and controlling the output power of the fuel cell according to the determined fuel cell operation power point.
2. The multi-gear hysteresis control method of the fuel cell system as claimed in claim 1, wherein the fuel cell system is connected with the battery management system, the vehicle controller and the fuel system controller through a CAN network;
when the key electric signal is in an ON gear, the vehicle control unit acquires an SOC value sent by the battery management system.
3. The multi-gear hysteresis control method of the fuel cell system as claimed in claim 1, wherein the determining the operating power point of the fuel cell by using the power multi-gear hysteresis principle of the power cell SOC value according to the collected SOC value of the fuel cell comprises:
determining the SOC partition interval of the battery based on the rated power of the engine of the whole vehicle;
determining the control gear number of the fuel cell according to the battery SOC division interval;
the power request of the fuel cell is changed in steps of A% of rated power of the fuel cell according to the SOC division;
determining a fuel cell control gear corresponding to the acquired cell SOC value according to the relation between the SOC partition intervals and the fuel cell control gear;
and determining a power request point of the corresponding vehicle control unit by combining the SOC interval of the hysteresis power battery according to the determined control gear of the fuel battery.
4. The multi-gear hysteresis control method of a fuel cell system as claimed in claim 3, wherein the gear division of the fuel cell control is determined according to the size N of the SOC interval of each gear, wherein N is more than or equal to 8.
5. The multi-gear hysteresis control method of the fuel cell system as claimed in claim 3, wherein the size F of the SOC interval of the hysteresis power cell is determined according to the number of the divided fuel cell control gears and the rated power of the fuel cell system, and F is greater than or equal to 8.
6. A fuel cell system multiple-stage hysteresis control method as set forth in claim 3, wherein the battery SOC division interval is 0 to 90%.
7. The multi-stage hysteresis control method of a fuel cell system as claimed in claim 1, wherein the output power of the fuel cell is controlled according to the determined operating power point of the fuel cell, specifically:
after the vehicle controller determines the operating power point of the fuel cell, the operating power point is set through a communication protocol and sent to the CAN bus in a message mode;
the fuel cell system controller receives the message through the CAN bus and responds to the requested power sent by the vehicle controller.
8. A multi-gear hysteresis control system of a fuel cell system is characterized by comprising a vehicle control unit, a battery management system and a fuel cell system controller; wherein, the first and the second end of the pipe are connected with each other,
the vehicle control unit acquires a power battery SOC value of a battery management system;
when a signal allowing the fuel cell system to generate power is received, the vehicle control unit determines an operation power point of the fuel cell according to the acquired battery SOC value and by utilizing the power multi-gear and hysteresis principle of the power battery SOC value, and sends the determined operation power point of the fuel cell to the fuel cell system controller;
and the fuel cell system controller controls the output power of the fuel cell according to the determined fuel cell operation power point.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of a fuel cell system multi-stage hysteresis control method according to any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps in a fuel cell system multi-stage hysteresis control method according to any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111152691A (en) * | 2020-01-10 | 2020-05-15 | 风氢扬科技(杭州)有限公司 | Power control method, device and system, vehicle control unit and storage medium |
| CN112550086A (en) * | 2020-12-22 | 2021-03-26 | 一汽解放汽车有限公司 | Vehicle energy management method and device, vehicle and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111152691A (en) * | 2020-01-10 | 2020-05-15 | 风氢扬科技(杭州)有限公司 | Power control method, device and system, vehicle control unit and storage medium |
| CN112550086A (en) * | 2020-12-22 | 2021-03-26 | 一汽解放汽车有限公司 | Vehicle energy management method and device, vehicle and storage medium |
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Application publication date: 20221108 |