CN112373456B - Control method and control system of range-extended hybrid vehicle and vehicle - Google Patents

Control method and control system of range-extended hybrid vehicle and vehicle Download PDF

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CN112373456B
CN112373456B CN202011280148.7A CN202011280148A CN112373456B CN 112373456 B CN112373456 B CN 112373456B CN 202011280148 A CN202011280148 A CN 202011280148A CN 112373456 B CN112373456 B CN 112373456B
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vehicle
soc
battery
charging
cost
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CN112373456A (en
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刘庆勃
孙昊
刘德春
林元则
韦健林
王一戎
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Zhejiang Geely Holding Group Co Ltd
Geely Sichuan Commercial Vehicle Co Ltd
Zhejiang Geely New Energy Commercial Vehicle Development Co Ltd
Zhejiang Geely Remote New Energy Commercial Vehicle Group Co Ltd
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Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely New Energy Commercial Vehicle Group Co Ltd
Geely Sichuan Commercial Vehicle Co Ltd
Zhejiang Geely New Energy Commercial Vehicle Development Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • 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
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • 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
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a control method and a control system of an extended-range hybrid vehicle and the vehicle. Specifically, the control method of the extended range hybrid vehicle may include: acquiring data of a powertrain of the vehicle; calculating to obtain the comprehensive use cost of the vehicle according to the data of the power system of the vehicle; and controlling the vehicle to output power to drive the vehicle to run in a manner of minimizing cost according to the calculated comprehensive use cost of the vehicle. The invention introduces cost prices of different driving modes, particularly introduces a fast charge price, a slow charge price and a fuel price, calculates the comprehensive use cost of the vehicle according to the prices and other data, and controls the vehicle to run at the minimum use cost according to the comprehensive use cost of the vehicle, thereby reducing the use cost of the vehicle.

Description

Control method and control system of range-extended hybrid vehicle and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and a control system of an extended-range hybrid vehicle and the vehicle.
Background
The range-extended hybrid vehicle generally comprises a range extender, a driving motor, a high-voltage battery pack and the like to form a power system, wherein an engine does not participate in driving, and fuel can be converted into electric energy through the range extender to participate in driving or be stored in the battery pack. The extended range oil-electricity hybrid vehicle has two energy sources, electric energy and fossil energy (diesel oil, gasoline, natural gas, etc.), and the use cost thereof includes fuel cost and charging cost. When a control strategy is formulated by the current range-extended hybrid vehicle, a power system control strategy is formulated usually by using the residual electric quantity of a battery and the working condition of the vehicle, and the strategy optimization is carried out without introducing parameters of fuel price and charging cost price. In the service life of the vehicle, the price of fuel and the price of charging fluctuate, and the price fluctuation influences the service cost of the vehicle.
Disclosure of Invention
An object of the first aspect of the present invention is to provide a control method for an extended range hybrid vehicle, which solves the problem of high use cost of the vehicle due to introduction of fuel price and charging price in the prior art.
Another object of the first aspect of the present invention is to solve the problem in the prior art that the efficiency of the power system of the vehicle is low because the power battery target control SoC is not established according to different costs.
It is an object of a second aspect of the invention to provide a control system for an extended range hybrid vehicle.
It is an object of a third aspect of the invention to provide a vehicle incorporating the control system of the extended range hybrid vehicle.
In particular, the present invention provides a control method of an extended range hybrid vehicle, comprising:
storing cost prices of vehicles driven by different powers and simultaneously acquiring data of a power system of the vehicles; wherein the different powers comprise fuel oil as power and electric energy as power; the cost price comprises a fast charge price, a slow charge price and a fuel price; the data of the vehicle's powertrain system includes battery charge power, battery discharge power, state of charge, motor drive power, motor feed power, and/or accessory power;
calculating to obtain the comprehensive use cost of the vehicle according to the cost price and the data of the power system of the vehicle;
and controlling the vehicle to output power to drive the vehicle to run in a manner of minimizing cost according to the calculated comprehensive use cost of the vehicle.
Optionally, on the premise that the normal running of the vehicle is met, the vehicle is controlled to drive the vehicle in different driving modes according to the charging type of the vehicle, the data of a power system of the vehicle and the calculated comprehensive use cost of the vehicle, so that the SoC value of the battery is a preset value when the vehicle runs, and the use cost of the vehicle is reduced, wherein the driving modes include an electric energy driving mode in which the electric energy of the battery is used for driving the vehicle and a fuel oil driving mode in which the fuel oil is used for driving the vehicle.
Optionally, the charging type of the battery is obtained according to the battery charging power, and the charging type includes a fast charging and a slow charging.
Optionally, calculating the cost of the vehicle for comprehensive use comprises:
estimating and saving charge capacity, wherein the charge capacity comprises slow charge capacity and fast charge capacity;
calculating the battery energy use cost of the vehicle in the running process according to the cost price, the charging electric quantity, the battery discharging power and the motor feeding power;
obtaining unit cost of the battery energy according to the battery energy use cost;
obtaining the actual and comprehensive unit cost of the vehicle according to the unit cost of the battery energy, the unit cost of the fuel oil and the proportion of the energy generated by the range extender to the sum of the energy generated by the range extender and the battery charging energy when the vehicle runs;
and obtaining the comprehensive use cost of the vehicle according to the unit cost of the actual comprehensive use of the vehicle and the hundred-kilometer energy consumption of the vehicle, wherein the hundred-kilometer energy consumption is obtained by calculation according to the motor driving power, the motor feed power and the accessory power.
Optionally, when the comprehensive use cost of the vehicle driven by the slow-charging electric energy is lower than that of the vehicle driven by the fast-charging electric energy, and meanwhile, the comprehensive use cost of the vehicle driven by the fast-charging electric energy is lower than that of the vehicle driven by the fuel oil, the vehicle is controlled to use the electric energy driving mode to drive the vehicle to move in the driving process, and when the target SoC value of the battery is the preset value, the electric energy driving mode is controlled to be switched to use the fuel oil driving mode to drive the vehicle to run.
Optionally, when the comprehensive use cost of the vehicle driven by the slow-charging electric energy is less than that of the vehicle driven by the fast-charging electric energy, and the comprehensive use cost of the vehicle driven by the fast-charging electric energy is less than that of the vehicle driven by the fuel oil, the target SoC value of the battery is:
when (SoC)real-(Tf+Ts)/eB)＜SoCLowThen SoCtarget＝SoCLow；
When the SoC isLow＜(SoCreal-(Tf+Ts)/eB)＜SoCBestThen SoCtarget＝(SoCreal-Tf+Ts/eB)；
When the SoC isBest＜(SoCreal-(Tf+Ts)/eB) Then SoCtarget＝SoCBest；
Wherein, SoCtargetPerforming simulation and bench verification for the target SoC value of the battery according to the parameters of the power systemObtaining the voltage level with higher power system efficiency, correspondingly selecting the corresponding battery SoC level, and setting the battery SoC level as SoCBest；SoCLowSoC value of battery to be charged; e.g. of the typeBAs the power of the power cell, SoCLrealIs the current battery electric quantity SoC value, T of the vehiclesFor slow charging, TfThe charge capacity is fast.
Alternatively, when the cost of using slow-charging electric power to drive the vehicle is less than the cost of using fuel to drive the vehicle, meanwhile, when the comprehensive use cost of driving the vehicle by adopting the fuel oil is lower than that of driving the vehicle by adopting the quick-charging electric energy, controlling the vehicle to drive the vehicle to run by using the electric energy driving mode in the running process, and after the slowly charged electric energy is consumed, then the vehicle is driven to run by adopting the fuel driving mode until the fuel is exhausted, and then the vehicle is switched to run by adopting the electric energy driving mode, when the vehicle drives the vehicle by using the electric energy driving mode, when the target SoC value of the battery is the preset value, the electric energy driving mode is controlled to be switched to the fuel oil driving mode to drive the vehicle to run.
Optionally, when the comprehensive use cost of driving the vehicle by using the slow-charging electric energy is less than the comprehensive use cost of driving the vehicle by using the fuel oil, and the comprehensive use cost of driving the vehicle by using the fuel oil is less than the comprehensive use cost of driving the vehicle by using the fast-charging electric energy, the target SoC value of the battery is:
when (SoC)real-Ts/eB)＜SoCLowThen SoCtarget＝SoCLow；
When the SoC isLow＜(SoCreal-Ts/eB)＜SoCBestThen SoCtarget＝(SoCreal-Ts/eB)；
When the SoC isBest＜(SoCreal-Ts/eB) Then SoCtarget＝SoCBest。
In particular, the invention also provides a control system of the extended-range hybrid vehicle, which comprises a control device and a processor, wherein the control device comprises a memory and the processor, the memory stores a control program, and the control program is used for realizing the control method of the extended-range hybrid vehicle when being executed by the processor.
In particular, the invention also provides a vehicle comprising the control system of the extended-range hybrid vehicle.
According to the control method of the extended range hybrid vehicle, cost prices of different driving modes are introduced, specifically, a fast charge price, a slow charge price and a fuel price are introduced, the comprehensive use cost of the vehicle is obtained through calculation according to the prices and other data, and the vehicle is controlled to run at the minimum use cost according to the comprehensive use cost of the vehicle, so that the use cost of the vehicle is reduced.
In the actual use process of the vehicle battery, the efficiency of the power system is different under different voltage conditions, and the efficiency of the power system is relatively higher when the working voltage is high. When the SoC of the battery can be kept within a certain range, the high efficiency of a vehicle power system can be ensured, the efficient charge and discharge of the battery can be ensured, and the service life of the battery is prolonged. In the running process of the vehicle, namely the vehicle is driven by a power source with lower cost, the SoC of the battery is controlled to be kept within a certain range, namely a preset value, so that a power system and the battery work in a high-efficiency area, and the aim of reducing the comprehensive use cost of the vehicle is fulfilled.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic flow chart diagram of a control method of an extended range hybrid vehicle according to one embodiment of the present disclosure;
FIG. 2 is a schematic block diagram of a control method of an extended range hybrid vehicle according to one embodiment of the present disclosure;
FIG. 3 is a flow chart of a comprehensive usage cost calculation process for a vehicle according to one embodiment of the present invention;
fig. 4 is a schematic block diagram of a control system of an extended-range hybrid vehicle according to another embodiment of the present invention.
Detailed Description
FIG. 1 is a schematic flow chart diagram of a control method of an extended range hybrid vehicle according to one embodiment of the present disclosure; the embodiment provides a control method of an extended range hybrid vehicle, which specifically includes:
s10, storing the cost price of the vehicle when the vehicle is driven by different powers, and simultaneously acquiring the data of the power system of the vehicle; wherein, different powers comprise fuel oil as power and electric energy as power; the cost price comprises a fast charge price, a slow charge price and a fuel price; data of a powertrain of the vehicle includes battery charge power, battery discharge power, state of charge, motor drive power, motor feed power, and/or accessory power;
s20, calculating the comprehensive use cost of the vehicle according to the cost price and the data of the power system of the vehicle;
s30 controls the vehicle to output power to drive the vehicle in a manner that minimizes costs, based on the calculated total use cost of the vehicle.
Specifically, in the control method of the extended range hybrid vehicle of the embodiment, cost prices of different driving modes, specifically, a fast charge price, a slow charge price and a fuel price are introduced, a comprehensive use cost of the vehicle is calculated according to the prices and other data, and the vehicle is controlled to run at the minimum use cost according to the comprehensive use cost of the vehicle, so that the use cost of the vehicle is reduced.
Specifically, the vehicle capable of using the method of the embodiment may include an on-vehicle multimedia terminal, a vehicle control unit and a vehicle power system. The vehicle power system comprises three main components, namely a power battery, a range extender and a driving motor, and a corresponding control system. All the components are communicated through the CAN, and signals are interacted.
The vehicle-mounted multimedia terminal is provided with an interface, and information (yuan/liter) such as direct current fast charging price (yuan/degree), alternating current slow charging price (yuan/degree), fuel price and the like is input. And updating the price information after the price information is changed. And displaying the unit cost estimated by the whole vehicle controller, namely the corresponding hundred kilometers of use cost when a single energy source is used independently, such as information (yuan/100 km) of fast charging unit cost, yuan/100 km of slow charging unit cost, unit cost of fuel and the like. And displaying the actual use cost (Yuan/100 km) estimated by the vehicle controller for the driver to refer to.
In addition, as a specific embodiment, after the comprehensive use cost of the vehicle is calculated according to the cost price and data of a power system of the vehicle, the comprehensive use cost of the vehicle can be displayed on a display screen of the vehicle, so that a driver can intuitively know the neutralization use cost of the vehicle under different fuel prices, slow charge prices and fast charge prices, and further can actively select the energy with lower use cost to drive the vehicle to run.
And the vehicle control unit receives parameter signals of the vehicle-mounted multimedia terminal and the power system, estimates the average energy consumption level of the vehicle, calculates the use cost of each energy source and sends the use cost to the vehicle-mounted multimedia terminal for display. When the vehicle is parked and charged, the charging type of the vehicle is judged, and the charging amount is stored. A powertrain control strategy is optimized based upon the input signal.
FIG. 2 is a schematic block diagram of a control method of an extended range hybrid vehicle according to one embodiment of the present disclosure;
as a specific embodiment of the present invention, S40 controls the vehicle to drive the vehicle in different driving manners according to the charging type of the vehicle, the data of the power system of the vehicle, and the calculated comprehensive use cost of the vehicle, so that the SoC value of the battery is a preset value when the vehicle is running, thereby reducing the use cost of the vehicle, where the driving manners include an electric driving manner in which the vehicle is driven by electric energy of the battery and a fuel driving manner in which the vehicle is driven by fuel.
Specifically, in the actual use process of the vehicle battery, the efficiency of the power system is different under different voltage conditions, and the efficiency of the power system is relatively high when the working voltage is high. When the SoC of the battery can be kept within a certain range, the high efficiency of a vehicle power system can be ensured, the efficient charge and discharge of the battery can be ensured, and the service life of the battery is prolonged. Therefore, in the embodiment, when the vehicle runs, that is, when the vehicle is driven by using a power source with lower cost, the SoC for controlling the battery can be kept within a certain range, that is, a preset value, so that the power system and the battery both work in a high-efficiency area, and the purpose of reducing the comprehensive use cost of the vehicle is achieved.
As a specific embodiment, in the present embodiment, the charging type of the battery is obtained according to the charging power of the battery, and the charging type includes a fast charging and a slow charging. In general, the cost of slow charging is the lowest, while there is a fluctuation between the cost of fast charging and the price of fuel, so that the use of fast charging or fuel by the vehicle will have a direct impact on the use cost of the vehicle.
FIG. 3 is a flow chart of a comprehensive usage cost calculation process for a vehicle according to one embodiment of the present invention;
as a specific embodiment of the present invention, calculating the comprehensive use cost of the vehicle includes:
s21 estimates and saves the charge capacity, which includes a slow charge capacity and a fast charge capacity.
Specifically, the multimedia terminal communicates with the vehicle control unit through the CAN network, and when the quick charging price C is setfSlow charge price CsPrice of fuel CrDuring information, the signal is transmitted to the controller through the event type message, and the controller stores corresponding price information after receiving the information.
When the vehicle is charged, the vehicle controller obtains the charging state of the power battery and the charging power P of the battery from the power systemBCDistinguishing vehicle charging types and estimating correspondenceThe charging energy kW.h of (1) assumes that the amount of quick charge in the battery before charging is Tf frontThe slow charge is Ts front. When the sub-charging is completed, the quick charging amount delta TfSlow charge amount Δ Ts. At the end of charging, Tf＝Tf front+ΔTfAnd Ts＝Ts front+ΔTsPreservation of TfAnd Ts。
And S22, calculating the battery energy use cost of the vehicle in the running process according to the cost price, the charging electric quantity, the battery discharging power and the motor feeding power.
Specifically, the vehicle control unit obtains the vehicle speed from the power system and increases the output power P of the range extenderROil consumption of range extender bF(kW/L), battery charging power PBCBattery discharge power PBDMotor driving power PMDFeed power P of the motorMCAccessory power PAWhere each power is the net power at the input/output.
Suppose that the vehicle is driven with priority to use the slow charging energy and then the fast charging energy, TfAnd TsThe minimum value is 0. Calculating the difference (P) between the battery discharge capacity and the motor feed capacity, which is caused by the fact that the use cost needs to be eliminated and the braking energy recoveryBD-PMC) And representing the energy of the external source consumed by the vehicle in the driving process, wherein the use cost of the battery energy used in the driving process is MbIn order to realize the purpose,
when the electric quantity used by the vehicle is less than the slow charge quantity, namely ^ P (P)BD-PMC)＜TsThen M isb＝Cs·∫(PBD-PMC)。
When the electric quantity used by the vehicle is larger than the slow charge quantity and smaller than the sum of the fast charge quantity and the slow charge quantity, namely Ts＜∫(PBD-PMC)＜Ts+TfThen M isb＝Cs·Ts+Cf·(∫(PBD-PMC)-Ts)。
And S23, obtaining the unit cost of the battery energy according to the battery energy use cost.
Specific battery energy usage has a unit cost of mb＝Mb/∫(PBD-PMC)。
And S24, obtaining the actual comprehensive use unit cost of the vehicle according to the unit cost of the battery energy, the unit cost of the fuel oil and the proportion of the energy generated by the range extender to the sum of the energy generated by the range extender and the battery charging energy when the vehicle is driven.
Specifically, when the vehicle runs, the ratio of the generated energy of the range extender to the charging energy of the range extender and the battery is iR：
When the energy used by the vehicle is less than the sum of the quick charge and the slow charge of the battery, iR＝∫PR/∫(PR+PBD+PMC)。
When the energy used by the vehicle is more than the sum of the quick charge and slow charge of the battery, iR＝∫PR/∫(PR+Ts+Tf)。
Specifically, by referring to the calculation logic of the driving range estimation module, the average energy consumption of a certain driving distance s (km) of the vehicle can be obtained and is converted into the energy consumption E of hundreds of kilometersv(kWh/100km), then Ev＝100*∫(PM+PA)/s。PM＝PMD+PMC,PMD、PMCAnd PACan be monitored, therefore, the energy consumption of one hundred kilometers EvCorresponding to the known number, can be directly displayed on the multimedia terminal.
Energy costs can be estimated by the above-mentioned hundred kilometers of energy consumption. In particular, the cost per unit of fast charge (yuan/100 km), mf＝Cf·Ev(ii) a Unit cost m of slow chargings＝Cs·Ev(yuan/100 km); unit cost m of fuelr＝Cr/bF·Ev(yuan/100 km). And the vehicle control unit transmits each unit cost signal to a multimedia terminal through the CAN to be displayed.
The actual unit cost (yuan/kWh) of the comprehensive use is mgThen m isg＝iR·mr+(1-iR)mb。
And S25, obtaining the comprehensive use cost of the vehicle according to the actual comprehensive use unit cost of the vehicle and the hundred kilometer energy consumption of the vehicle, wherein the hundred kilometer energy consumption is obtained by calculation according to the motor driving power, the motor feeding power and the accessory power.
Vehicle Integrated cost of use (Yuan/100 km) Mg＝mg·Ev。
The comprehensive use cost of the vehicle obtained by the method can be calculated according to the quick charge price CfSlow charge price CsPrice of fuel CrThe vehicle is subject to fluctuation, and when different prices are input, the obtained vehicle comprehensive use cost is different. And the calculated comprehensive use cost of the vehicle can be directly displayed at the vehicle multimedia terminal, so that a driver can intuitively know the comprehensive use cost of the vehicle of the energy sources with different prices, the vehicle can be driven to run by using different energy sources, and the use cost of the vehicle is further reduced.
As a specific embodiment of the present invention, when the comprehensive use cost of driving the vehicle by using the slow-charging electric energy is lower than the comprehensive use cost of driving the vehicle by using the fast-charging electric energy, and the comprehensive use cost of driving the vehicle by using the fast-charging electric energy is lower than the comprehensive use cost of driving the vehicle by using the fuel oil, the vehicle is controlled to drive the vehicle to move by using the electric energy driving mode in the driving process, and when the target SoC value of the battery is a preset value, the vehicle is controlled to be driven to run by using the fuel oil driving mode.
When the SoC value of the battery of the vehicle is a preset value, the efficiency of the power system is high, and the charging and discharging efficiency of the battery is also high. Therefore, the aim of reducing the comprehensive use cost of the vehicle can be achieved by controlling the vehicle to use an energy source with lower priority and ensuring the SoC value of the battery to be in a preset value form in the running process of the vehicle.
Specifically, when the comprehensive use cost of the electric-driven vehicle adopting slow charging is less than that of the electric-driven vehicle adopting fast charging, and the comprehensive use cost of the electric-driven vehicle adopting fast charging is less than that of the vehicle adopting fuel oil, the target SoC value of the battery is:
when (SoC)real-(Tf+Ts)/eB)＜SoCLowThen SoCtarget＝SoCLow；
When the SoC isLow＜(SoCreal-(Tf+Ts)/eB)＜SoCBestThen SoCtarget＝(SoCreal-Tf+Ts/eB)；
When the SoC isBest＜(SoCreal-(Tf+Ts)/eB) Then SoCtarget＝SoCBest；
Wherein, SoCtargetFor the target SoC value of the battery, carrying out simulation and bench verification according to the parameters of the power system to obtain the voltage level with higher efficiency of the power system, and correspondingly selecting the corresponding SoC level of the battery to set as SoCBest；SoCLowSoC value of battery to be charged; e.g. of the typeBIs the electric quantity of the power battery, SoCrealIs the current battery power SoC value of the vehicle, TsFor slow charging, TfThe charge capacity is fast.
As another specific embodiment, when the comprehensive use cost of the vehicle driven by the slow-charging electric energy is less than the comprehensive use cost of the vehicle driven by the fuel oil, and the comprehensive use cost of the vehicle driven by the fuel oil is less than the comprehensive use cost of the vehicle driven by the fast-charging electric energy, the vehicle is controlled to drive the vehicle in the electric energy driving mode during the driving process, after the slow-charging electric energy is consumed, the vehicle is driven by the fuel oil driving mode to run until the fuel oil is consumed, and then the vehicle is switched to drive the vehicle in the electric energy driving mode, wherein when the vehicle drives the vehicle in the electric energy driving mode, the electric energy driving mode is switched to the fuel oil driving mode to drive the vehicle to run when the target SoC value of the battery is a preset value.
When the comprehensive use cost of the electric energy driving vehicle adopting slow charging is less than that of the electric energy driving vehicle adopting fuel oil, and the comprehensive use cost of the electric energy driving vehicle adopting fuel oil is less than that of the electric energy driving vehicle adopting fast charging, the target SoC value of the battery is as follows:
when (SoC)real-Ts/eB)＜SoCLowThen SoCtarget＝SoCLow；
When the SoC isLow＜(SoCreal-Ts/eB)＜SoCBestThen SoCtarget＝(SoCreal-Ts/eB)；
When the SoC isBest＜(SoCreal-Ts/eB) Then SoCtarget＝SoCBest。
The vehicle is driven by different energy sources through controlling the vehicle according to the form, slow charging energy is consumed preferentially to drive the vehicle, fuel is consumed later to drive the vehicle, and then quick charging energy is consumed to drive the vehicle. In the process of consuming slow charging energy or fast charging energy, when the target SoC value of the battery reaches a preset value, the target SoC value is directly switched to fuel oil as a power source to drive the vehicle, so that the SoC value of the whole battery is ensured to be within a preset value range, and the efficiency of a power system is further ensured.
Fig. 4 is a schematic block diagram of a control system of an extended-range hybrid vehicle according to another embodiment of the present invention. As a specific embodiment of the present invention, the present embodiment further provides a control system 100 of the extended-range hybrid vehicle, the control system 100 may include a control device 101, the control device 101 may include a memory 10 and a processor 20, the memory 10 stores a control program, and the control program is executed by the processor 20 to implement a control method of the extended-range hybrid vehicle. The processor 20 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The processor 20 transceives data through the communication interface. The memory 10 is used to store programs executed by the processor 20. The memory 20 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, or a combination of memories. The above-described computing program may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or to a computer or external storage device via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network).
As a specific embodiment of the present invention, the present embodiment also provides a vehicle that may include the control system of the extended range hybrid vehicle described above.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (9)

1. A control method of an extended range hybrid vehicle, comprising:
storing cost prices of vehicles driven by different powers and acquiring data of a power system of the vehicles; wherein the different powers comprise fuel oil as power and electric energy as power; the cost price comprises a fast charge price, a slow charge price and a fuel price; the data of the vehicle's powertrain system includes battery charge power, battery discharge power, state of charge, motor drive power, motor feed power, and/or accessory power;
calculating to obtain the comprehensive use cost of the vehicle according to the cost price and the data of the power system of the vehicle;
controlling the vehicle to output power to drive the vehicle to run in a manner of minimizing cost according to the calculated comprehensive use cost of the vehicle;
wherein calculating the cost of the vehicle comprises:
estimating and saving charge capacity, wherein the charge capacity comprises slow charge capacity and fast charge capacity;
calculating the battery energy use cost of the vehicle in the running process according to the cost price, the charging electric quantity, the battery discharging power and the motor feeding power;
obtaining unit cost of the battery energy according to the battery energy use cost;
obtaining the actual and comprehensive unit cost of the vehicle according to the unit cost of the battery energy, the unit cost of the fuel oil and the proportion of the energy generated by the range extender to the sum of the energy generated by the range extender and the battery charging energy when the vehicle runs;
and obtaining the comprehensive use cost of the vehicle according to the unit cost of the actual comprehensive use of the vehicle and the hundred-kilometer energy consumption of the vehicle, wherein the hundred-kilometer energy consumption is obtained by calculation according to the motor driving power, the motor feed power and the accessory power.
2. The extended-range hybrid vehicle control method according to claim 1,
on the premise of meeting the requirement of normal running of the vehicle, controlling the vehicle to drive the vehicle in different driving modes according to the charging type of the vehicle, the data of a power system of the vehicle and the calculated comprehensive use cost of the vehicle, so that the SoC value of the battery is a preset value when the vehicle runs, and the use cost of the vehicle is reduced, wherein the driving modes comprise an electric energy driving mode for driving the vehicle by adopting electric energy of the battery and a fuel oil driving mode for driving the vehicle by adopting fuel oil.
3. The extended-range hybrid vehicle control method according to claim 2,
and obtaining the charging type of the battery according to the charging power of the battery, wherein the charging type comprises quick charging and slow charging.
4. The extended-range hybrid vehicle control method according to claim 2 or 3,
when the comprehensive use cost of the vehicle driven by the slow-charging electric energy is lower than that of the vehicle driven by the fast-charging electric energy, and the comprehensive use cost of the vehicle driven by the fast-charging electric energy is lower than that of the vehicle driven by the fuel oil, the vehicle is controlled to use the electric energy driving mode to drive the vehicle to move in the driving process, and when the target SoC value of the battery is the preset value, the electric energy driving mode is controlled to be switched to be driven by the fuel oil driving mode to operate.
5. The extended-range hybrid vehicle control method according to claim 4,
when the comprehensive use cost of the electric energy driving vehicle adopting slow charging is less than that of the electric energy driving vehicle adopting fast charging, and the comprehensive use cost of the electric energy driving vehicle adopting fast charging is less than that of the vehicle adopting fuel oil driving, the target SoC value of the battery is as follows:
when (SoC)real-(Tf+Ts)/eB)＜SoCLowThen SoCtarget＝SoCLow；
When the SoC isLow＜(SoCreal-(Tf+Ts)/eB)＜SoCBestThen SoCtarget＝(SoCreal-Tf+Ts/eB)；
When the SoC isBest＜(SoCreal-(Tf+Ts)/eB) Then SoCtarget＝SoCBest；
Wherein, SoCtargetFor the target SoC value of the battery, simulation and bench verification are carried out according to the parameters of the power system to obtain the voltage level with higher efficiency of the power system, and the corresponding SoC level of the battery is correspondingly selected and set as SoCBest；SoCLowSoC value of battery to be charged; e.g. of the typeBIs the electric quantity of the power battery, SoCrealIs the current battery electric quantity SoC value of the vehicle, TsFor slow charging, TfThe charge capacity is fast.
6. The extended-range hybrid vehicle control method according to claim 2 or 3,
when the cost of using slow-charging electric power to drive a vehicle is less than the cost of using fuel to drive the vehicle, meanwhile, when the comprehensive use cost of driving the vehicle by adopting the fuel oil is lower than that of driving the vehicle by adopting the quick-charging electric energy, controlling the vehicle to drive the vehicle to run by using the electric energy driving mode in the running process, after the slowly charged electric energy is consumed, then the vehicle is driven to run by adopting the fuel driving mode until the fuel is exhausted, and then the vehicle is switched to run by adopting the electric energy driving mode, when the vehicle drives the vehicle by using the electric energy driving mode, when the target SoC value of the battery is the preset value, the electric energy driving mode is controlled to be switched to the fuel oil driving mode to drive the vehicle to run.
7. The extended-range hybrid vehicle control method according to claim 6,
when the comprehensive use cost of the vehicle driven by the slow-charging electric energy is less than that of the vehicle driven by the fuel oil, and the comprehensive use cost of the vehicle driven by the fuel oil is less than that of the vehicle driven by the fast-charging electric energy, the target SoC value of the battery is as follows:
when (SoC)real-Ts/eB)＜SoCLowThen SoCtarget＝SoCLow；
When SoCLow＜(SoCreal-Ts/eB)＜SoCBestThen SoCtarget＝(SoCreal-Ts/eB)；
When the SoC isBest＜(SoCreal-Ts/eB) Then SoCtarget＝SoCBest。
8. A control system of an extended range hybrid vehicle is characterized in that,
comprising a control device comprising a memory and a processor, the memory having stored therein a control program for implementing a control method of an extended range hybrid vehicle according to any one of claims 1-7 when executed by the processor.
9. A vehicle characterized by comprising the control system of the extended range hybrid vehicle of claim 8.
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