CN115056658A - Control method and device of power supply system, power supply system and vehicle - Google Patents
Control method and device of power supply system, power supply system and vehicle Download PDFInfo
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- CN115056658A CN115056658A CN202210771266.0A CN202210771266A CN115056658A CN 115056658 A CN115056658 A CN 115056658A CN 202210771266 A CN202210771266 A CN 202210771266A CN 115056658 A CN115056658 A CN 115056658A
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
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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
- 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/18—Controlling the braking effect
Abstract
The invention relates to the technical field of new energy, and provides a control method and device of a power supply system, the power supply system and a vehicle, wherein the control method comprises the following steps: acquiring an operation instruction and driving parameter data of a vehicle; determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data; according to the driving power and the running state, when the driving power of the vehicle is reduced and the vehicle enters an energy feedback state, controlling the motor controller to transmit the feedback electric energy to the super capacitor and controlling the DCDC converter to transmit the electric energy in the super capacitor to the power battery; wherein the driving power is partially or completely provided by the fuel cell. The invention can effectively improve the electric energy recovery quantity of the vehicle, thereby reducing the energy waste and improving the braking force of the vehicle.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a control method and device of a power supply system, the power supply system and a vehicle.
Background
In the process of braking of the pure electric vehicle, a common energy-saving mode is that when the vehicle brakes and decelerates, a driving motor is used for energy recovery; if the fuel cell vehicle decelerates during the operation of the fuel cell system, the recovered power of the motor cannot be fully utilized and can only be greatly reduced or even cleared, so that the kinetic energy of the vehicle which should be recovered is consumed by mechanical braking, energy waste is caused, the reduction of the recovered power of the motor causes the reduction of the braking force of the vehicle, and the risk of driving by a driver is improved.
In the existing method, a super capacitor system is usually added at the rear end of a fuel cell system and the front end of a unidirectional Direct Current (DCDC) converter, so as to buffer the response difference of the fuel cell in a physical manner. However, this method can only simply process the problem of temporarily buffering the fuel cell in a short time, and once the feedback of the power cell itself is limited, the requirements for feedback and braking cannot be met, so that the problems of energy waste and braking force reduction cannot be effectively solved.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a control method and device of a power supply system, the power supply system and a vehicle.
The invention provides a control method of a power supply system, which comprises the following steps:
acquiring an operation instruction and driving parameter data of a vehicle;
determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data;
according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
The control method of the power supply system provided by the invention further comprises the following steps:
when the vehicle is determined not to enter the energy feedback state, determining a numerical value interval of the driving power;
and controlling the super capacitor and/or the power battery to charge or discharge based on the numerical value interval of the driving power.
According to the control method of the power supply system provided by the invention, the controlling the super capacitor and/or the power battery to charge or discharge based on the value interval of the driving power comprises the following steps:
if the numerical range of the driving power is a first range, controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor; wherein the electric energy transferred to the super capacitor is used for charging the super capacitor and/or providing the driving power;
if the numerical interval of the driving power is a second interval, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel battery; the driving power corresponding to the first interval is larger than the driving power corresponding to the second interval.
According to the control method of the power supply system provided by the invention, if the numerical range of the driving power is a first range, the step of controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor comprises the following steps:
acquiring the current electric quantity of the super capacitor;
determining a target transmission power of the DCDC converter based on a charge amount threshold of the super capacitor, a current charge amount of the super capacitor and the driving power; wherein the DCDC converter is used for transmitting the electric energy in the fuel cell and/or the power cell to the super capacitor according to the target transmission power.
According to the control method of the power supply system provided by the present invention, if the numerical range of the driving power is a second range, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel cell includes:
and controlling the super capacitor and/or the power battery to charge or discharge based on the comparison result of the output power of the fuel battery and the driving power, and the current electric quantity and electric quantity threshold values of the power battery and the super capacitor.
The present invention also provides a control device of a power supply system, including:
the data acquisition module is used for acquiring an operation instruction and driving parameter data of the vehicle;
the calculation module is used for determining the driving power and the running state of the vehicle based on the operation instruction and the running parameter data;
the electric energy management module is used for controlling the motor controller to transmit the feedback electric energy to the super capacitor and controlling the DCDC converter to transmit the electric energy in the super capacitor to the power battery when the driving power of the vehicle is reduced and the vehicle enters an energy feedback state according to the driving power and the driving state; wherein the driving power is partially or completely provided by a fuel cell.
The present invention also provides a power supply system comprising: the battery unit, the DCDC converter, the super capacitor and the motor controller are sequentially connected in series;
wherein the battery unit comprises at least one fuel cell and at least one power cell; each fuel cell and each power cell are connected in parallel;
the motor controller is connected with the motor.
The present invention also provides a vehicle comprising: a controller and a power supply system as described above; wherein the controller is configured to execute the control method of the power supply system according to any one of the above.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the control method of the power supply system.
The present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a control method of a power supply system as described in any one of the above.
The control method and the control device of the power supply system, the power supply system and the vehicle provided by the invention have the advantages that by acquiring the operation instruction and the driving parameter data of the vehicle, and determines the driving power and the running state of the vehicle based on the operation instruction and the running parameter data, when the driving power of the vehicle is reduced and the vehicle enters an energy feedback state according to the driving power and the driving state, controlling the motor controller to transmit the electric energy fed back by the motor to the super capacitor, meanwhile, the DCDC converter is controlled to transmit the electric energy in the super capacitor to the power battery so as to continuously vacate an energy storage space for the super capacitor, when the vehicle carries out energy feedback, the influence that the fuel cell cannot reduce or stop generating power in time and the power cell is limited in the capacity of receiving electric energy is avoided, the electric energy recovery quantity of the vehicle can be effectively improved, the energy waste is further reduced, and the braking force of the vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling a power supply system provided by the present invention;
FIG. 2 is a schematic structural diagram of a control device of the power supply system provided by the present invention;
FIG. 3 is a schematic diagram of a power supply system provided by the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The control method of the power supply system of the invention is described below with reference to fig. 1. The control method of the power supply system of the present invention is executed by an electronic device such as a controller or hardware and/or software therein. The controller can be a controller of the vehicle, such as a vehicle controller, or can be a newly added controller. Fig. 1 is a schematic flow chart of a control method of a power supply system in an embodiment of the present invention, and as shown in fig. 1, the control method of the power supply system of the present invention includes:
and S101, acquiring an operation instruction and running parameter data of the vehicle.
Specifically, vehicles such as passenger cars, commercial vehicles, construction machines, and the like employ fuel cells to provide electric power. The operation command is a command input by an operator through a control member of the vehicle, and the operation command includes a gear command, an accelerator command, a brake command, and the like. The running parameter data of the vehicle may be a running speed of the vehicle. The method can acquire the operation instruction of the vehicle and the driving parameter data of the vehicle in real time so as to control the power supply system in real time.
And S102, determining the driving power and the running state of the vehicle based on the operation instruction and the running parameter data.
Specifically, the driving power of the vehicle, that is, the power required to satisfy the normal driving of the vehicle, may be determined according to the operation instruction. The driving state of the vehicle may be determined based on the operation command and the driving parameter data, for example, based on an accelerator command, a brake command, and a comparison result of a driving speed of the vehicle at the present time and a driving speed at the previous time.
S103, according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
Specifically, a decrease in the driving power of the vehicle generally refers to a situation in which a sudden decrease in the driving power occurs, that is, the driving power is suddenly reduced, such as sudden braking or the like; whether the driving power of the vehicle is reduced may be determined based on comparing the driving power at the present time with the driving power at the previous time. Wherein the driving power is partly or entirely provided by the fuel cell, i.e. the fuel cell is in operation.
Whether the vehicle enters the energy feedback state or not can be determined according to the running state of the vehicle, for example, when the vehicle is determined to be in deceleration running according to the running state of the vehicle, the vehicle is determined to enter the energy feedback state, and after the vehicle is determined to enter the energy feedback state, a control command can be sent to the motor controller so that the motor controller can control the motor to convert the kinetic energy of the vehicle into the electric energy.
Because the response speed of the fuel cell is slow, when the driving power of the vehicle is reduced, the power generation power of the fuel cell cannot be reduced or stopped in time, and therefore redundant electric energy needs to be stored in the power cell. Meanwhile, when the vehicle enters an energy feedback state, the electric energy fed back by the motor also needs to be stored in the power battery. When the capacity of the power battery for receiving the electric energy is limited, the kinetic energy of the vehicle which should be recovered is converted into heat energy by the mechanical brake to be consumed, so that the motor cannot fully recover the electric energy, and the energy is wasted. In addition, the torque of the motor is positively correlated with the recovery power of the motor, the smaller the recovery power is, the smaller the torque of the motor is, the smaller the anti-drag force generated by the motor is, and under the condition that the depths of the brake pedals are the same, the smaller the generated brake force is, so that the brake cannot be effectively applied, and the greater potential safety hazard of driving is caused.
According to the embodiment of the invention, when the driving power of the vehicle is reduced and the vehicle enters the energy feedback state, the motor controller is controlled to transmit the electric energy fed back by the motor to the super capacitor so as to absorb the instantaneous large current through the super capacitor, and redundant electric energy in the fuel cell can be stored in the power battery; meanwhile, the DCDC converter is controlled to transmit the electric energy in the super capacitor to the power battery so as to continuously vacate an energy storage space for the super capacitor, so that when the vehicle carries out energy feedback, the vehicle can not be influenced by the fact that the fuel cell cannot timely reduce or stop the power generation power and the power battery is limited in the capacity of receiving the electric energy, the electric energy recovery quantity of the vehicle can be effectively improved, the energy waste is further reduced, and the braking force of the vehicle is improved.
Meanwhile, the electric energy fed back by the motor is transmitted to the super capacitor by controlling the motor controller, and the electric energy in the super capacitor is transmitted to the power battery by controlling the DCDC converter, so that the impact of instantaneous heavy current in the energy feedback process on the power battery can be effectively avoided, and the service life of the power battery is guaranteed; in addition, in the conventional method, the electric energy fed back by the motor is directly stored in the power battery, because the current fed back by the motor is unstable and the current is large, in order to avoid the damage of the large current to the power battery, the set electric quantity threshold (maximum electric energy storage amount) is usually low, for example, 80%, which causes the waste of the storage space of the power battery. The embodiment of the invention can determine the transmission power of the DCDC converter according to the capacity of the power battery for receiving the electric energy and the power of the fuel battery for storing the electric energy, so as to control the DCDC converter to transmit the electric energy in the super capacitor to the power battery according to the transmission power, thereby ensuring the charging stability of the power battery, avoiding the damage of the large current to the power battery without reserving a larger storage space, and ensuring the full utilization of the storage space of the power battery.
Based on the above embodiment, further include:
when the vehicle is determined not to enter the energy feedback state, determining a numerical value interval of the driving power;
and controlling the super capacitor and/or the power battery to charge or discharge based on the numerical value interval of the driving power.
Specifically, the vehicle does not enter an energy regenerative state, i.e., there is no electric energy being back fed by the electric machine.
A plurality of value ranges may be preset, and the value ranges respectively correspond to different levels of driving power, such as high driving power and low driving power. After the specific value of the driving power is determined, the driving power can be matched with each numerical value interval to obtain the numerical value interval in which the driving power is located.
After the value interval of the driving power is determined, the super capacitor and/or the power battery can be further controlled to be charged or discharged according to the value interval of the driving power. For example, when the driving power is high driving power, the super capacitor and/or the power battery can be discharged to assist the fuel cell in providing the driving power so as to meet the driving requirement of the vehicle, and when the driving power is low driving power, the super capacitor and/or the power battery can be charged through the fuel cell so as to ensure the effective utilization of the electric energy output by the fuel cell.
Based on any one of the above embodiments, the controlling the super capacitor and/or the power battery to charge or discharge based on the value interval of the driving power includes:
if the numerical range of the driving power is a first range, controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor; wherein the electric energy transferred to the super capacitor is used for charging the super capacitor and/or providing the driving power;
if the numerical interval of the driving power is a second interval, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel battery; the driving power corresponding to the first interval is larger than the driving power corresponding to the second interval.
Specifically, the driving power corresponding to the first interval is greater than the driving power corresponding to the second interval, for example, the first interval may be a high driving power, and the second interval may be a low driving power. The values of the first interval and the second interval can be set according to the working condition of the vehicle, the power generation capacity of the fuel cell and the storage capacities of the power cell and the super capacitor.
If the numerical value interval of the driving power is a first interval, namely the vehicle is in a high-power driving state, controlling the DCDC converter to transmit the electric energy in the fuel battery and/or the power battery to the super capacitor, and transmitting the electric energy to the super capacitor, wherein on one hand, the DCDC converter can be used for charging the super capacitor, namely, controlling the super capacitor to charge; on the other hand, the motor controller can obtain the driving power required by the vehicle from the super capacitor so as to meet the driving requirement of the vehicle, namely, the super capacitor is used for transmitting electric energy. The driving power is unstable in the running process of the vehicle, instantaneous peak current exists, in order to guarantee the working stability of the fuel cell and the power cell, the transmission power of the DCDC converter can be set according to the mean value of the driving power, so that the DCDC converter transmits the electric energy in the fuel cell and/or the power cell to the super capacitor according to the transmission power, and meanwhile, the instantaneous peak current in the driving power is provided through the electric energy stored in the super capacitor, namely, the super capacitor is controlled to discharge to provide the instantaneous peak current in the driving power, so that the driving requirement of the vehicle can be effectively met, and the working stability of the fuel cell and the power cell is guaranteed.
The specific manner of controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor may be set according to actual requirements, for example, when the output power of the fuel cell is greater than or equal to the transmission power of the DCDC converter, the DCDC converter may be controlled to transmit the electric energy in the fuel cell to the super capacitor; when the output power of the fuel cell is less than the transmission power of the DCDC converter, the DCDC converter can be controlled to simultaneously transmit the electric energy in the fuel cell and the electric energy in the power cell to the super capacitor; when the fuel cell does not work, the DCDC converter can be controlled to transmit the electric energy in the power cell to the super capacitor, so that the fuel cell is assisted to provide driving power through the discharge of the power cell.
If the numerical range of the driving power is the second range, namely the vehicle is in a low-power driving state, the driving power required by the vehicle can be met through the electric energy provided by the fuel cell, and meanwhile, the power cell and/or the super capacitor can be charged through the redundant electric energy in the fuel cell, so that when the driving power required by the vehicle cannot be met through the fuel cell, the driving power required by the vehicle can be provided through the power cell and/or the super capacitor in an auxiliary manner, the reliable running of the vehicle is ensured, the electric energy provided by the fuel cell does not need to fluctuate according to the fluctuation of the driving power, and the working stability of the fuel cell is ensured. It should be noted that, when the driving power required by the vehicle is satisfied by the electric energy provided by the fuel cell, the electric energy in the fuel cell still needs to be transmitted to the super capacitor through the DCDC converter, so as to obtain the driving power required by the vehicle from the super capacitor through the motor controller, that is, the electric energy is transmitted through the super capacitor.
The output power of the fuel cell can be obtained by collecting the output voltage and the output current of the fuel cell.
According to any embodiment of the foregoing, if the numerical range of the driving power is a first range, the controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor includes:
acquiring the current electric quantity of the super capacitor;
determining a target transmission power of the DCDC converter based on a charge amount threshold of the super capacitor, a current charge amount of the super capacitor and the driving power; wherein the DCDC converter is used for transmitting the electric energy in the fuel cell and/or the power cell to the super capacitor according to the target transmission power.
Specifically, when the numerical interval in which the driving power is located is a first interval, in the process of controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor, first, the current electric quantity of the super capacitor is obtained, where the current electric quantity of the super capacitor is the electric quantity actually stored in the super capacitor at the current moment.
After the current electric quantity of the super capacitor is obtained, the target transmission power of the DCDC converter, that is, the electric energy to be transmitted from the fuel cell and/or the power cell to the super capacitor by the DCDC converter, may be determined according to an electric quantity threshold of the super capacitor (that is, the maximum electric energy storage amount of the super capacitor), the current electric quantity of the super capacitor, and the driving power of the vehicle. The electric quantity threshold Of the super capacitor can be set according to actual requirements, for example, the electric quantity threshold Of the super capacitor can be the electric quantity Of the super capacitor in a State Of Charge (SOC), so that when the vehicle enters an energy feedback State, enough storage space can be provided for absorbing instant large current generated in the energy feedback process, and when the vehicle enters the energy feedback State, the vehicle can not be limited by the capacity Of the power battery for receiving electric energy, so that energy recovery and auxiliary braking are not reserved; meanwhile, when the vehicle is in a high-power driving state, instantaneous peak current in driving power can be effectively provided so as to meet the driving requirement of the vehicle and ensure the working stability of the fuel cell and the power cell.
Based on any of the above embodiments, if the numerical interval where the driving power is located is the second interval, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel battery includes:
and controlling the super capacitor and/or the power battery to charge or discharge based on the comparison result of the output power of the fuel battery and the driving power, and the current electric quantity and electric quantity threshold values of the power battery and the super capacitor.
Specifically, when the numerical interval in which the driving power is located is a second interval, the super capacitor and/or the power battery are controlled to be charged or discharged based on the comparison result of the output power of the fuel battery and the driving power, the current electric quantity and electric quantity threshold value of the power battery and the current electric quantity and electric quantity threshold value of the super capacitor. For example, when the output power of the fuel cell is greater than the driving power, the distribution scheme of the residual electric energy in the fuel cell can be determined according to the current electric quantity and the electric quantity threshold value of the power cell and the current electric quantity and the electric quantity threshold value of the super capacitor, that is, the electric quantity stored in the power cell and the electric quantity stored in the super capacitor are determined, so that the utilization rate of the electric energy in the fuel cell can be effectively improved on the premise of ensuring the performance requirements of the power cell and the super capacitor.
When the output power of the fuel cell is smaller than the driving power, the distribution scheme of the residual driving power can be determined according to the current electric quantity and the electric quantity threshold value of the power cell and the current electric quantity and the electric quantity threshold value of the super capacitor, namely, the driving power provided by the power cell and the driving power provided by the super capacitor are determined, so that the driving requirement of the vehicle can be effectively met on the premise of ensuring the performance requirements of the power cell and the super capacitor.
It can be understood that the distribution scheme of the remaining driving power can also be determined according to the difference value between the driving power and the output power of the fuel cell, the current electric quantity of the power cell and the current electric quantity of the super capacitor according to a preset sequence or a distribution ratio.
The following describes a control device of a power supply system provided by the present invention, and the control device of the power supply system described below and the control method of the power supply system described above may be referred to correspondingly. As shown in fig. 2, the control device of the power supply system of the present invention includes:
a data acquisition module 201, configured to acquire an operation instruction and driving parameter data of a vehicle;
a calculation module 202, configured to determine a driving power and a driving state of the vehicle based on the operation command and the driving parameter data;
the electric energy management module 203 is used for controlling the motor controller to transmit the feedback electric energy to the super capacitor and controlling the DCDC converter to transmit the electric energy in the super capacitor to the power battery when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state according to the driving power and the driving state; wherein the driving power is partially or completely provided by a fuel cell.
Based on the above embodiment, the power management module 203 is further configured to:
when the vehicle is determined not to enter the energy feedback state, determining a numerical value interval of the driving power;
and controlling the super capacitor and/or the power battery to charge or discharge based on the numerical value interval of the driving power.
Based on any of the above embodiments, the electric energy management module 203 is specifically configured to:
if the numerical range of the driving power is a first range, controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor; wherein the electric energy transferred to the super capacitor is used for charging the super capacitor and/or providing the driving power;
if the numerical interval of the driving power is a second interval, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel battery; the driving power corresponding to the first interval is larger than the driving power corresponding to the second interval.
Based on any of the above embodiments, the electric energy management module 203 is specifically configured to:
acquiring the current electric quantity of the super capacitor;
determining a target transmission power of the DCDC converter based on a charge amount threshold of the super capacitor, a current charge amount of the super capacitor and the driving power; wherein the DCDC converter is used for transmitting the electric energy in the fuel cell and/or the power cell to the super capacitor according to the target transmission power.
Based on any of the above embodiments, the electric energy management module 203 is specifically configured to:
and controlling the super capacitor and/or the power battery to charge or discharge based on the comparison result of the output power of the fuel battery and the driving power, and the current electric quantity and electric quantity threshold values of the power battery and the super capacitor.
An embodiment of the present invention further provides a power supply system, as shown in fig. 3, the power supply system of the present invention includes: a battery unit 301, a DCDC converter 302, a super capacitor 303, and a motor controller 304 connected in series in this order;
wherein the battery unit 301 comprises at least one fuel cell 305 and at least one power cell 306; each of the fuel cells 305 and each of the power cells 306 are connected in parallel;
the motor controller 304 is connected to a motor 307.
Specifically, only one fuel cell 305 and one power cell 306 are illustrated in fig. 3, and the number of the fuel cells 305 and the number of the power cells 306 may be plural. The DCDC converter 302 is a bidirectional DCDC converter, that is, the DCDC converter 302 can transmit the electric energy in the super capacitor 303 to the power battery 306, and can also transmit the electric energy in the power battery 306 and/or the fuel cell 305 to the super capacitor 303. The power supply system is controlled by a vehicle control unit of the vehicle to realize the control method of the power supply system according to any one of the above embodiments.
The specific operation of the power supply system of the present invention is described below in an alternative embodiment.
When the vehicle is in a high-power driving state, determining a target transmission power of the DCDC converter 302 according to a power threshold of the super capacitor 303, a current power of the super capacitor 303 and a driving power of the vehicle, and controlling the DCDC converter 302 to transmit electric energy from the fuel cell 305 and/or the power cell 306 to the super capacitor 303 according to the target transmission power, wherein the electric energy transmitted to the super capacitor 303 is used for charging the super capacitor 303 on one hand so that the power of the super capacitor 303 is kept in a low-low SOC state, and is used for the motor controller 304 to obtain the driving power required by the vehicle on the other hand so as to meet the driving requirement of the vehicle.
When the vehicle is in a low-power driving state, the super capacitor 303 and/or the power battery 306 are/is controlled to be charged or discharged based on the comparison result of the output power of the fuel battery 305 and the driving power, the current electric quantity and electric quantity threshold value of the power battery 306 and the current electric quantity and electric quantity threshold value of the super capacitor 303.
When the driving power of the vehicle is reduced and the vehicle enters an energy feedback state, controlling the motor controller 304 to transmit the electric energy fed back by the motor 307 to the super capacitor 303 so as to absorb the instantaneous large current through the super capacitor 303; meanwhile, the DCDC converter 302 is controlled to transmit the electric energy in the super capacitor 303 to the power battery 306 so as to continuously vacate an energy storage space for the super capacitor 303, so that when the vehicle performs energy feedback, the influence that the fuel battery 305 cannot timely reduce or stop generating power and the capacity of the power battery 306 for receiving the electric energy is limited is avoided, the electric energy recovery amount of the vehicle can be effectively improved, the energy waste is reduced, and the braking force of the vehicle is improved.
The embodiment of the invention also provides a vehicle, which comprises a controller and the power supply system in the embodiment; the controller is used for executing the control method of the power supply system according to any one of the above embodiments.
Specifically, vehicles such as passenger cars, commercial vehicles, construction machines, and the like employ fuel cells to provide electric power.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)401, a communication Interface (communication Interface)402, a memory (memory)403 and a communication bus 404, wherein the processor 401, the communication Interface 402 and the memory 403 complete communication with each other through the communication bus 404. Processor 401 may invoke logic instructions in memory 403 to perform a method of controlling a power system, the method comprising: acquiring an operation instruction and driving parameter data of a vehicle;
determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data;
according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
In addition, the logic instructions in the memory 403 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform a method of controlling a power supply system provided by the above methods, the method comprising: acquiring an operation instruction and driving parameter data of a vehicle;
determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data;
according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the control method of the power supply system provided in each of the above aspects, the method including: acquiring an operation instruction and driving parameter data of a vehicle;
determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data;
according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method of a power supply system, characterized by comprising:
acquiring an operation instruction and driving parameter data of a vehicle;
determining the driving power and the driving state of the vehicle based on the operation instruction and the driving parameter data;
according to the driving power and the running state, when the driving power of the vehicle is determined to be reduced and the vehicle enters an energy feedback state, controlling a motor controller to transmit feedback electric energy to a super capacitor and controlling a DCDC converter to transmit the electric energy in the super capacitor to a power battery; wherein the driving power is partially or completely provided by a fuel cell.
2. The control method of a power supply system according to claim 1, characterized by further comprising:
when the vehicle is determined not to enter the energy feedback state, determining a numerical value interval of the driving power;
and controlling the super capacitor and/or the power battery to charge or discharge based on the numerical value interval of the driving power.
3. The control method of the power supply system according to claim 2, wherein the controlling the super capacitor and/or the power battery to be charged or discharged based on the value interval of the driving power includes:
if the numerical range of the driving power is a first range, controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor; wherein the electric energy transferred to the super capacitor is used for charging the super capacitor and/or providing the driving power;
if the numerical interval of the driving power is a second interval, controlling the super capacitor and/or the power battery to charge or discharge based on the output power of the fuel battery; the driving power corresponding to the first interval is larger than the driving power corresponding to the second interval.
4. The method according to claim 3, wherein the controlling the DCDC converter to transmit the electric energy in the fuel cell and/or the power cell to the super capacitor if the driving power is in a first interval comprises:
acquiring the current electric quantity of the super capacitor;
determining a target transmission power of the DCDC converter based on a charge amount threshold of the super capacitor, a current charge amount of the super capacitor and the driving power; wherein the DCDC converter is used for transmitting the electric energy in the fuel cell and/or the power cell to the super capacitor according to the target transmission power.
5. The method according to claim 3, wherein the controlling the super capacitor and/or the power battery to be charged or discharged based on the output power of the fuel cell if the driving power is in the second interval comprises:
and controlling the super capacitor and/or the power battery to charge or discharge based on the comparison result of the output power of the fuel battery and the driving power, and the current electric quantity and electric quantity threshold values of the power battery and the super capacitor.
6. A control device of a power supply system, characterized by comprising:
the data acquisition module is used for acquiring an operation instruction and driving parameter data of the vehicle;
the calculation module is used for determining the driving power and the running state of the vehicle based on the operation instruction and the running parameter data;
the electric energy management module is used for controlling the motor controller to transmit the feedback electric energy to the super capacitor and controlling the DCDC converter to transmit the electric energy in the super capacitor to the power battery when the driving power of the vehicle is reduced and the vehicle enters an energy feedback state according to the driving power and the driving state; wherein the driving power is partially or completely provided by a fuel cell.
7. A power supply system, comprising: the battery unit, the DCDC converter, the super capacitor and the motor controller are sequentially connected in series;
wherein the battery unit comprises at least one fuel cell and at least one power cell; each fuel cell and each power cell are connected in parallel;
the motor controller is connected with the motor.
8. A vehicle, characterized by comprising: a controller and the power supply system of claim 7; wherein the controller is configured to execute the control method of the power supply system according to any one of claims 1 to 5.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the control method of the power supply system according to any one of claims 1 to 5 when executing the program.
10. A non-transitory computer-readable storage medium on which a computer program is stored, the computer program implementing the control method of the power supply system according to any one of claims 1 to 5 when executed by a processor.
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| CN202210771266.0A CN115056658A (en) | 2022-06-30 | 2022-06-30 | Control method and device of power supply system, power supply system and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115593278A (en) * | 2022-12-13 | 2023-01-13 | 中国第一汽车股份有限公司（Cn） | Mode switching control method for power system of fuel cell vehicle, vehicle and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115593278A (en) * | 2022-12-13 | 2023-01-13 | 中国第一汽车股份有限公司（Cn） | Mode switching control method for power system of fuel cell vehicle, vehicle and storage medium |
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