CN113895317B - Control method and device of multi-energy coupling power system and vehicle - Google Patents
Control method and device of multi-energy coupling power system and vehicle Download PDFInfo
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- CN113895317B CN113895317B CN202111395790.4A CN202111395790A CN113895317B CN 113895317 B CN113895317 B CN 113895317B CN 202111395790 A CN202111395790 A CN 202111395790A CN 113895317 B CN113895317 B CN 113895317B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Fuel Cell (AREA)
Abstract
The application discloses a control method of a multi-energy coupling power system, which is used for controlling a fuel cell to be in a corresponding power output level according to the required power of a direct current bus and the energy storage state of an energy storage power unit and adjusting the output power of the energy storage power unit according to specific conditions. By adopting the technical scheme, the fuel cell is controlled to be at a fixed power output level, fixed power is output, and the current output power of the energy storage power unit is adaptively adjusted by combining the energy storage state of the energy storage power unit, the required power of the direct current bus and the output power of the fuel cell. According to the technical scheme, under the condition that the required power of the direct current bus is met, the output power of the fuel cell is stable, and the service life of the fuel cell is prolonged. In addition, the application also discloses a control device of the multi-energy coupling power system and a vehicle, and the control device corresponds to a control method of the multi-energy coupling power system, and has the same effects.
Description
Technical Field
The present disclosure relates to the field of coupled power technologies, and in particular, to a control method and apparatus for a multi-energy coupled power system, and a vehicle.
Background
With the rise of attention of the society to the problems of global temperature rise, environmental deterioration and the like, new energy technology is gaining more and more widespread attention. The hydrogen energy and the fuel cell are clean energy technologies, and the fuel cell has the characteristics of high power density and small emission pollution, and has been widely applied in the fields of electric power, traffic and the like.
In the prior art, the super capacitor, the fuel cell and the power battery are commonly used for power supply in a matched manner, so that the defects of insufficient energy of the super capacitor and insufficient power characteristics of the power battery in the running process of an electric car are overcome, and the complementary defect among energy storage components is realized. However, the method has the defect that in order to meet the power requirements of the direct current bus under different conditions, the fuel cell needs to adjust the output power, so that the output power of the fuel cell is unstable and cannot work in a stable working interval, and the service life of the fuel cell is shortened.
It can be seen how to operate the fuel cell in a gentle operation region, and to improve the service life of the fuel cell is a problem to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a control method and device of a multi-energy coupling power system and a vehicle, which are used for enabling a fuel cell to work in a gentle working interval and prolonging the service life of the fuel cell.
In order to solve the above technical problems, the present application provides a control method of a multi-energy coupling power system, the method comprising:
acquiring the required power of a direct current bus and the energy storage state of an energy storage power unit;
controlling the fuel cell to be at a corresponding power output level according to the energy storage state of the energy storage power unit and the required power;
judging whether the input of an energy storage power unit is needed or not according to the energy storage state, the required power and the output power of the fuel cell corresponding to the power output level;
if so, the current output power of the energy storage power unit is adjusted to meet the demand power.
Preferably, the energy storage state includes a high-power energy storage state, a medium-power energy storage state and a low-power energy storage state; the power output levels include a first power output level, a second power output level, and a third power output level; wherein the output power of the third power output level is greater than the output power of the second power output level, which is greater than the output power of the first power output level.
Preferably, if the energy storage state of the energy storage power unit is a high-power energy storage state, the method further includes:
judging whether the rated output power of the energy storage power unit is smaller than the required power, if so, judging whether the sum of the output power of the fuel cell at the first power output level and the rated output power of the energy storage power unit is smaller than the required power;
if not, controlling the fuel cell to be at the first power output level, and adjusting the current output power of the energy storage power unit to meet the required power; if the power is smaller than the first power output level, the fuel cell is lifted to the second power output level from the first power output level, and whether the sum of the output power of the fuel cell and the rated output power of the energy storage power unit at the second power output level is smaller than the required power is judged; if not, controlling the fuel cell to be at the second power output level, and adjusting the current output power of the energy storage power unit to meet the required power; and if the power is smaller than the first power output level, controlling the fuel cell to be at the third power output level, and adjusting the current output power of the energy storage power unit to meet the required power.
Preferably, if the energy storage state of the energy storage power unit is a medium electric quantity energy storage state, the method further includes:
judging whether the output power of the fuel cell at the second power output level is smaller than the required power, and if not, controlling the fuel cell at the second power output level;
if the output power of the fuel cell is smaller than the required power, the fuel cell is lifted to the third power output level from the second power output level, whether the output power of the fuel cell in the third power output level is smaller than the required power is judged, if the output power of the fuel cell in the third power output level is smaller than the required power, the energy storage power unit is put into the fuel cell, the current output power of the energy storage power unit is regulated to meet the required power, and if the output power of the fuel cell in the third power output level is not smaller than the required power, the fuel cell is controlled to be in the third power output level.
Preferably, if the energy storage state of the energy storage power unit is a low-power energy storage state, the fuel cell is controlled to be at the third power output level.
Preferably, the method further comprises:
and judging whether the output power of the fuel cell at the third power output level is smaller than the required power, and if so, reducing the required power until the output power of the fuel cell at the third power output level is not larger than the required power.
Preferably, if the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state, the rated output power of the energy storage power unit is not less than the required power, the method further includes:
and adjusting the current output power of the energy storage power unit to meet the required power.
Preferably, if the energy storage state of the energy storage power unit is a medium-power energy storage state or a low-power energy storage state, when the output power of the fuel cell is greater than the required power, the method further includes:
charging the energy storage power unit by using surplus power; the surplus power is the power remaining after the output power of the fuel cell minus the required power.
In order to solve the technical problem, the present application further provides a control device of a multi-energy coupling power system, including: a memory and a processor;
wherein the memory is used for storing a computer program;
the processor is configured to implement the steps of the method for controlling a multi-energy coupled power system as described above when executing the computer program.
In order to solve the technical problem, the application also provides a vehicle, which comprises a vehicle body and the control device of the multi-energy coupling power system.
According to the control method of the multi-energy coupling power system, the fuel cell is controlled to be in the corresponding power output level according to the required power of the direct current bus and the energy storage state of the energy storage power unit, and the output power of the energy storage power unit is adjusted according to specific conditions. Compared with the prior art, the output power of the fuel cell is unstable and can not work in a stable working interval, by adopting the technical scheme, the fuel cell is controlled to be in a fixed power output level, fixed power is output, and the current output power of the energy storage power unit is adaptively adjusted by combining the energy storage state of the energy storage power unit, the required power of the direct current bus and the output power of the fuel cell. According to the technical scheme, under the condition that the required power of the direct current bus is met, the output power of the fuel cell is stable, and the service life of the fuel cell is prolonged.
In addition, the control device of the multi-energy coupling power system and the vehicle provided by the application correspond to the control method of the multi-energy coupling power system, and have the same effects.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method of a multi-energy coupled power system according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a control device of a multi-energy coupling power system according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
With the rise of attention of the society to the problems of global temperature rise, environmental deterioration and the like, new energy technology is gaining more and more widespread attention. The hydrogen energy and the fuel cell are clean energy technologies, and the fuel cell has the characteristics of high power density and small emission pollution, and has been widely applied in the fields of electric power, traffic and the like.
In the prior art, the super capacitor, the fuel cell and the power battery are commonly used for power supply in a matched manner, so that the defects of insufficient energy of the super capacitor and insufficient power characteristics of the power battery in the running process of an electric car are overcome, and the complementary defect among energy storage components is realized. However, the method has the defect that in order to meet the power requirements of the direct current bus under different conditions, the fuel cell needs to adjust the output power, so that the output power of the fuel cell is unstable and cannot work in a stable working interval, and the service life of the fuel cell is shortened.
The core of the application is to provide a control method and device of a multi-energy coupling power system and a vehicle.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
Fig. 1 is a flowchart of a control method of a multi-energy coupling power system according to an embodiment of the present application, as shown in fig. 1, the method includes:
s10: and acquiring the required power of the direct current bus and the energy storage state of the energy storage power unit.
In a specific implementation, the required power of the direct current bus depends on an operation instruction of a driver, and the required power is used for acceleration, deceleration, uniform running, illumination, air conditioning and the like of the vehicle. In the present application, the energy storage power unit is composed of a super capacitor and/or a power battery, and the energy storage state represents the stored electric quantity of the energy storage power unit. The energy storage state can be divided into a plurality of levels such as a first electric energy storage state, a second electric energy storage state, a third electric energy storage state and the like according to the quantity of electric energy stored by the energy storage power unit. The processor calculates the required power by reading the operation instruction of the driver, and judges the energy storage state of the energy storage power unit by reading the storage electric quantity of the energy storage power unit.
S11: and controlling the fuel cell to be at a corresponding power output level according to the energy storage state and the required power of the energy storage power unit.
In step S11, the power output of the fuel cell is classified, and the output power thereof is kept constant when the fuel cell is at a certain power output level. It will be appreciated that the number of power output levels of the fuel cell may be the same as or different from the number of stored energy states of the stored energy power unit. What power output level the fuel cell is at is determined by the energy storage state of the energy storage power unit and the power demand.
S12: and judging whether the input of the energy storage power unit is needed or not according to the energy storage state, the required power and the output power corresponding to the power output level of the fuel cell.
The total output power of the vehicle is composed of the output power of the energy storage power unit and the output power of the fuel cell. In step S12, it is determined whether the input of the energy storage power unit is required according to the required power of the dc bus and the output power of the fuel cell. After the output of the fuel cell is constant, if the actual requirement cannot be met, the energy storage power unit needs to be put into operation so that the total power output of the fuel cell and the energy storage power unit meets the requirement of the direct current bus. It should be noted that, if the electric quantity of the energy storage power unit is too low, the energy storage power unit cannot output power, and therefore cannot be put into use in this case, the energy storage state of the energy storage power unit needs to be considered when determining whether the input of the energy storage power unit is required.
S13: if so, the current output power of the energy storage power unit is adjusted to meet the demand power.
In this embodiment, when the output power of the fuel cell is still smaller than the required power of the dc bus and the energy storage power unit is capable of outputting power, the output power of the energy storage power unit is controlled, and the output power is adjusted, so that the total output power of the fuel cell and the energy storage power unit meets the required power and does not exceed the required power too much.
According to the control method of the multi-energy coupling power system, the fuel cell is controlled to be in the corresponding power output level according to the required power of the direct current bus and the energy storage state of the energy storage power unit, and the output power of the energy storage power unit is adjusted according to specific conditions. Compared with the prior art, the output power of the fuel cell is unstable and can not work in a stable working interval, by adopting the technical scheme, the fuel cell is controlled to be in a fixed power output level, fixed power is output, and the current output power of the energy storage power unit is adaptively adjusted by combining the energy storage state of the energy storage power unit, the required power of the direct current bus and the output power of the fuel cell. According to the technical scheme, under the condition that the required power of the direct current bus is met, the output power of the fuel cell is stable, and the service life of the fuel cell is prolonged.
In a specific implementation, the function of the energy storage power unit is to supplement the output power of the fuel cell when the power can be output, and the judgment of the stored electric quantity only needs to distinguish whether the energy storage power unit can output power or not, so that the energy storage state of the energy storage power unit does not need to be classified excessively.
In the embodiment of the application, the energy storage state of the energy storage power unit is divided into three states, including a high-electric-quantity energy storage state, a medium-electric-quantity energy storage state and a low-electric-quantity energy storage state. The high-power energy storage state indicates that the energy storage power unit is sufficient in storage power, and can meet high-power and long-time power output. The medium electric quantity energy storage state indicates that the energy storage power unit stores certain electric quantity and can output power according to the use of the vehicle. The low-power energy storage state indicates that the energy storage power unit is insufficient in storage power and cannot output power. In particular real time, the state may be determined based on the lowest output power at which the energy storage power unit is capable of outputting.
Similarly, if the power output level of the fuel cell is classified too much, the calculation level of the processor is increased when determining what power output level the fuel cell is at, and too much classification results in a variety of output powers of the fuel cell, which is detrimental to the healthy use of the fuel cell. If the power output of the fuel cell is too low, the power output of the fuel cell is too high or too low for a long time, so that the resource is wasted or the power requirement of the direct current bus cannot be met.
Thus, in embodiments of the present application, the power output levels include a first power output level, a second power output level, and a third power output level; wherein the output power of the third power output level is greater than the output power of the second power output level, which is greater than the output power of the first power output level.
It will be appreciated that the three levels in this embodiment should be determined based on the threshold of the fuel cell output power in the implementation, and the usual power of the vehicle.
According to the control method of the multi-energy coupling power system, the energy storage state of the energy storage power unit is divided into three states, the power output grade of the fuel cell is divided into three grades, the calculation grade of the processor is reduced, and the service life of the fuel cell is prolonged.
In the above embodiment, the energy storage state of the energy storage power unit is divided into three states, and the power output level of the fuel cell is divided into three levels, and for convenience of understanding, the following description will be made in detail according to a specific implementation scenario.
Scene one: if the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state, the method further comprises:
judging whether the rated output power of the energy storage power unit is smaller than the required power or not, if so, judging whether the sum of the output power of the fuel cell at the first power output level and the rated output power of the energy storage power unit is smaller than the required power or not;
if not, controlling the fuel cell to be at a first power output level, and adjusting the current output power of the energy storage power unit to meet the required power; if the power sum is smaller than the required power, the fuel cell is lifted from the first power output level to the second power output level, and whether the power sum of the output power of the fuel cell and the rated output power of the energy storage power unit is smaller than the required power is judged; if not, controlling the fuel cell to be at a second power output level, and adjusting the current output power of the energy storage power unit to meet the required power; and if the power is smaller than the first power output level, controlling the fuel cell to be at the third power output level, and adjusting the current output power of the energy storage power unit to meet the required power.
It will be appreciated that in practice, if the rated output power of the energy storage power unit cannot meet the power demand of the dc bus, a fuel cell needs to be put into operation. Since the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state, the energy storage power unit can take more power output, and the fuel cell can take a small part of power output. And if the total power is greater than or equal to the required power, the vehicle is jointly powered by the energy storage power unit and the fuel cell at the first power output level. And if the total power is larger than the required power under the condition that the energy storage power unit outputs rated power, the output power of the energy storage power unit is reduced adaptively.
If the total power output by the fuel cell at the first power output level and the energy storage power unit output at the rated power still cannot meet the requirement of the direct current bus, the fuel cell is lifted from the first power output level to the second power output level, and whether the total power under the condition meets the requirement is judged. Likewise, if not satisfied, the power output level of the fuel cell is increased to a third power output level. It will be appreciated that the total power output of the fuel cell at the third power output level and the stored energy power unit at rated power output should be the maximum power output of the vehicle, sufficient to meet the demand power of the dc bus.
According to the control method of the multi-energy coupling power system, when the energy storage state of the energy storage power unit is the high-electric-quantity energy storage state, the power output level of the fuel cell is gradually increased according to the magnitude relation between the required power and the rated output power of the energy storage power unit, and the vehicle is mainly powered by the energy storage power unit under the condition that the required power is met.
Scene II: if the energy storage state of the energy storage power unit is a medium electric quantity energy storage state, the method further comprises:
judging whether the output power of the fuel cell at the second power output level is smaller than the required power, and if not, controlling the fuel cell at the second power output level;
if the output power of the fuel cell is smaller than the required power, the energy storage power unit is put into the fuel cell, the current output power of the energy storage power unit is regulated to meet the required power, and if the output power of the fuel cell is not smaller than the required power, the fuel cell is controlled to be at the third power output level.
It can be seen that in the present embodiment, the fuel cell is preferentially used to supply power to the vehicle in the case where the energy storage state of the energy storage power unit is the medium-electric-quantity energy storage state. When the output power of the maximum power output level of the fuel cell still cannot meet the requirement of the direct current bus, the energy storage power unit is put into. When the fuel cell is used alone to supply power to the vehicle, the fuel cell is placed at the second power output level to meet the power demand, and the power output level is increased when the output power is insufficient. And placing the fuel cell at a second power output level, and if the output power at the moment is greater than the required power of the direct current bus, charging the energy storage power unit by using the residual power.
According to the control method of the multi-energy coupling power system, when the energy storage state of the energy storage power unit is the medium electric quantity energy storage state, the fuel cell is preferentially used for supplying power to the vehicle, and when the maximum output power of the fuel cell cannot meet the direct current bus requirement, the energy storage power unit is put into. The consumption of the energy storage power unit is effectively reduced, and the situation that the maximum output power of the fuel cell still does not meet the requirement of a direct current bus and the energy storage power unit does not have electric quantity is prevented.
Scene III: and if the energy storage state of the energy storage power unit is a low-electric-quantity energy storage state, controlling the fuel cell to be at a third power output level.
It can be understood that when the energy storage state of the energy storage power unit is the low-power energy storage state, the energy storage power unit cannot output power, and the vehicle can only be powered by the fuel cell. And, placing the fuel cell at a third power output level, the excess power may charge the stored energy power unit.
On the basis of the above embodiment, in this embodiment, if the energy storage state of the energy storage power unit is a low-power energy storage state, the fuel cell is at the third power output level, and further including:
and judging whether the output power of the fuel cell at the third power output level is smaller than the required power, and if so, reducing the required power until the output power of the fuel cell at the third power output level is not larger than the required power.
It can be understood that when the energy storage power unit cannot output power, and the maximum output power of the fuel cell still cannot meet the required power of the dc bus, the required power of the dc bus can only be reduced, and in particular, the air conditioner of the vehicle can be turned off for use, illumination, and the like, so that the required power is less than or equal to the output power of the fuel cell at the maximum power output level.
According to the control method of the multi-energy coupling power system, when the energy storage power unit cannot work and the output power of the fuel cell cannot meet the requirements of the direct current bus, the required power of the direct current bus is reduced, so that the vehicle can normally run.
In the above embodiment, when the energy storage state of the energy storage power unit is a high-power energy storage state and the rated output power does not meet the requirement of the dc bus, the fuel cell and the energy storage power unit are used to supply power to the vehicle together.
On the basis of the above embodiment, in this embodiment, if the energy storage state of the energy storage power unit is a high-power energy storage state, the rated output power of the energy storage power unit is not less than the required power, then the method further includes:
the current output power of the energy storage power unit is regulated to meet the demand power.
According to the control method of the multi-energy coupling power system, when the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state and the rated output power of the energy storage power unit is not smaller than the required power, the energy storage power unit is independently used for supplying power for the vehicle, so that consumption of a fuel cell is reduced, and the service life is prolonged.
On the basis of the above embodiment, in this embodiment, if the energy storage state of the energy storage power unit is a medium-power energy storage state or a low-power energy storage state, if the output power of the fuel cell is greater than the required power, the method further includes:
and charging the energy storage power unit by using surplus power, wherein the surplus power is the power remained after the output power of the fuel cell is subtracted from the required power.
It can be appreciated that, by charging the energy storage power unit with the fuel cell, the energy storage state of the energy storage power unit may be raised from the low-power energy storage state to the medium-power energy storage state, or from the medium-power energy storage state to the high-power energy storage state, at this time, the energy storage power unit may be introduced to supply power to the vehicle according to the logic in the above embodiment, and the power output level of the fuel cell may be adaptively adjusted, so as to reduce the energy consumption of the fuel cell.
According to the control method of the multi-energy coupling power system, when the energy storage state of the energy storage power unit is the medium-electric energy storage state or the low-electric energy storage state, under the condition that the output power of the fuel cell is larger than the required power, the energy storage power unit is charged by using more power, and the waste of resources is reduced.
In the above embodiments, the control method of the multi-energy coupling power system is described in detail, and the present application further provides embodiments corresponding to the control method of the multi-energy coupling power system.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
Fig. 2 is a block diagram of a control device of a multi-energy coupling power system according to an embodiment of the present application, as shown in fig. 2, the device includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the control method of the multi-energy coupled power system according to the above embodiment when executing a computer program.
The control device of the multi-energy coupling power system provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU) for taking care of rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, where the computer program, when loaded and executed by the processor 21, can implement the relevant steps of the control method of the multi-energy coupled power system disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, required power, power output level, and the like.
In some embodiments, the control device of the multi-energy coupling power system may further include a display 22, an input-output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
It will be appreciated by those skilled in the art that the configuration shown in fig. 2 is not limiting of the control means of the multi-energy coupled power system and may include more or fewer components than shown.
According to the control device of the multi-energy coupling power system, the fuel cell is controlled to be in the corresponding power output level according to the required power of the direct current bus and the energy storage state of the energy storage power unit, and the output power of the energy storage power unit is adjusted according to specific conditions. Compared with the prior art, the output power of the fuel cell is unstable and can not work in a stable working interval, by adopting the technical scheme, the fuel cell is controlled to be in a fixed power output level, fixed power is output, and the current output power of the energy storage power unit is adaptively adjusted by combining the energy storage state of the energy storage power unit, the required power of the direct current bus and the output power of the fuel cell. According to the technical scheme, under the condition that the required power of the direct current bus is met, the output power of the fuel cell is stable, and the service life of the fuel cell is prolonged.
Finally, the application also provides a vehicle, which comprises a vehicle body and the control device of the multi-energy coupling power system.
The vehicle comprises a vehicle body and the control device of the multi-energy coupling power system. The device can control the fuel cell to be in the corresponding power output level according to the required power of the direct current bus and the energy storage state of the energy storage power unit, and adjust the output power of the energy storage power unit according to specific conditions. Compared with the prior art, the output power of the fuel cell is unstable and can not work in a stable working interval, by adopting the technical scheme, the fuel cell is controlled to be in a fixed power output level, fixed power is output, and the current output power of the energy storage power unit is adaptively adjusted by combining the energy storage state of the energy storage power unit, the required power of the direct current bus and the output power of the fuel cell. According to the technical scheme, under the condition that the required power of the direct current bus is met, the output power of the fuel cell is stable, and the service life of the fuel cell is prolonged.
The control method, the device and the vehicle of the multi-energy coupling power system provided by the application are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. A control method of a multi-energy coupling power system, comprising:
acquiring the required power of a direct current bus and the energy storage state of an energy storage power unit;
controlling the fuel cell to be at a corresponding power output level according to the energy storage state of the energy storage power unit and the required power; and when the output power is insufficient, the power output level of the fuel cell is gradually increased;
judging whether the input of an energy storage power unit is needed or not according to the energy storage state, the required power and the output power of the fuel cell corresponding to the power output level;
if yes, the current output power of the energy storage power unit is regulated to meet the required power;
the energy storage state comprises a high-electric energy storage state, a medium-electric energy storage state and a low-electric energy storage state; the power output levels include a first power output level, a second power output level, and a third power output level; wherein the output power of the third power output level is greater than the output power of the second power output level, which is greater than the output power of the first power output level; when the fuel cell is at a certain power output level, its output power remains constant;
if the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state, the power output level of the fuel cell is gradually increased according to the relation between the required power and the rated output power of the energy storage power unit, and the vehicle is mainly powered by the energy storage power unit under the condition that the required power is met;
correspondingly, judging whether the rated output power of the energy storage power unit is smaller than the required power, if so, judging whether the sum of the output power of the fuel cell at the first power output level and the rated output power of the energy storage power unit is smaller than the required power;
if not, controlling the fuel cell to be at the first power output level, and adjusting the current output power of the energy storage power unit to meet the required power; if the power is smaller than the first power output level, the fuel cell is lifted to the second power output level from the first power output level, and whether the sum of the output power of the fuel cell and the rated output power of the energy storage power unit at the second power output level is smaller than the required power is judged; if not, controlling the fuel cell to be at the second power output level, and adjusting the current output power of the energy storage power unit to meet the required power; if the power is smaller than the first power output level, controlling the fuel cell to be at the third power output level, and adjusting the current output power of the energy storage power unit to meet the required power;
if the energy storage state of the energy storage power unit is a medium electric quantity energy storage state, the fuel cell is preferentially used for supplying power to the vehicle, and when the output power of the maximum power output level of the fuel cell still cannot meet the requirement of the direct current bus, the energy storage power unit is put into;
correspondingly, judging whether the output power of the fuel cell at the second power output level is smaller than the required power, and if not, controlling the fuel cell at the second power output level;
if the power is smaller than the required power, the second power output level of the fuel cell is increased to the third power output level, whether the output power of the fuel cell at the third power output level is smaller than the required power is judged, if the power is smaller than the required power, the energy storage power unit is put into the fuel cell, the current output power of the energy storage power unit is regulated to meet the required power, and if the power is not smaller than the required power, the fuel cell is controlled to be at the third power output level; charging an energy storage power unit by using surplus power, wherein the surplus power is the power remained after the output power of the fuel cell is subtracted from the required power;
if the energy storage state of the energy storage power unit is a low-electric-quantity energy storage state, the vehicle is powered by a fuel cell, and the fuel cell is controlled to be at the third power output level; and judging whether the output power of the fuel cell at the third power output level is smaller than the required power, and if so, reducing the required power until the output power of the fuel cell at the third power output level is not larger than the required power.
2. The control method of a multi-energy coupling power system according to claim 1, wherein if the energy storage state of the energy storage power unit is a high-electric-quantity energy storage state, the rated output power of the energy storage power unit is not less than the required power, further comprising:
and adjusting the current output power of the energy storage power unit to meet the required power.
3. The control method of a multi-energy coupling power system according to claim 1, wherein if the energy storage state of the energy storage power unit is a low-battery energy storage state, further comprising, in a case where the output power of the fuel cell is greater than the required power:
charging the energy storage power unit by using surplus power; the surplus power is the power remaining after the output power of the fuel cell minus the required power.
4. A control device for a multi-energy coupled power system, comprising: a memory and a processor;
wherein the memory is used for storing a computer program;
the processor is configured to implement the steps of the control method of the multi-energy coupled power system according to any one of claims 1 to 3 when executing the computer program.
5. A vehicle comprising a vehicle body and the control device of the multi-energy coupled power system of claim 4.
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| CN107264324B (en) * | 2017-06-30 | 2019-10-25 | 北京新能源汽车股份有限公司 | Energy control method, device and the fuel cell car of fuel cell car |
| CN108394401B (en) * | 2018-01-30 | 2020-03-17 | 清华大学 | Method, system, device and storage medium for controlling automobile power device |
| CN112659983B (en) * | 2020-04-03 | 2023-05-12 | 长城汽车股份有限公司 | Energy management method and battery control system for non-plug-in fuel cell vehicle |
| CN111775774A (en) * | 2020-06-23 | 2020-10-16 | 西安法士特汽车传动有限公司 | Fuel cell control method for hydrogen fuel cell vehicle |
| CN112078565B (en) * | 2020-09-17 | 2021-07-30 | 奇瑞汽车股份有限公司 | Energy management method and device for hydrogen fuel cell electric vehicle and storage medium |
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