CN116674399A - Range extender control method and device in running state and vehicle - Google Patents

Range extender control method and device in running state and vehicle Download PDF

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Publication number
CN116674399A
CN116674399A CN202310337965.9A CN202310337965A CN116674399A CN 116674399 A CN116674399 A CN 116674399A CN 202310337965 A CN202310337965 A CN 202310337965A CN 116674399 A CN116674399 A CN 116674399A
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CN
China
Prior art keywords
power
vehicle
range extender
target
rotating speed
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Pending
Application number
CN202310337965.9A
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Chinese (zh)
Inventor
魏路
郭中良
李晖
杨攀
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Chongqing Selis Phoenix Intelligent Innovation Technology Co ltd
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Chengdu Seres Technology Co Ltd
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Priority to CN202310337965.9A priority Critical patent/CN116674399A/en
Publication of CN116674399A publication Critical patent/CN116674399A/en
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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
    • B60L50/60—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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

Abstract

The application relates to a control method and device of a range extender in a driving state and a vehicle. The control method of the range extender in the running state comprises the following steps: when the vehicle is determined to be in an uphill driving state, acquiring the current states of an uphill angle value, a brake pedal and a door pedal of the vehicle; determining target power and target rotating speed of a range extender of the vehicle according to the uphill angle value of the vehicle, the current states of a brake pedal and an electric valve pedal and a preset corresponding relation table of power and rotating speed; and controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power. By adopting the range extender control method under the driving state, the power feeding of the battery caused by long ascending slope can be reduced, the charge-discharge conversion times are reduced, and the charge-discharge efficiency is increased, so that the fuel conversion efficiency is improved.

Description

Range extender control method and device in running state and vehicle
Technical Field
The application relates to the technical field of electric automobiles, in particular to a range extender control method and device in a running state and a vehicle.
Background
With the development of the automobile industry, electric automobiles are receiving more and more attention due to the increasing exhaustion of non-renewable energy sources and the increasing increase of environmental pollution. The range of the electric automobile is also a focus of attention, and when the vehicle-mounted rechargeable energy storage system cannot meet the range requirement, the vehicle-mounted auxiliary power supply device is turned on to supply electric energy for the power system, so that the range of the electric automobile is prolonged.
However, under the working condition of larger electric energy consumption such as uphill, in order to maintain the current vehicle speed, the output instantaneous power P2 of the motor of the vehicle is increased, and the battery pack capacity is consumed in a large amount, so that the residual electric energy value of the battery is fed quickly, the charge and discharge times are increased, the charge and discharge efficiency is reduced, and the fuel conversion efficiency is reduced. Therefore, how to solve the problem that the fuel conversion efficiency is reduced due to energy loss generated when the battery pack is charged and discharged due to the feeding of the remaining battery power value and the increasing of the charging and discharging times is a urgent need of those skilled in the art.
Disclosure of Invention
Based on the control method, the control device and the vehicle for the range extender in the running state are provided, and the problems that in the prior art, energy loss occurs when a battery pack is charged and discharged due to feeding of the residual electric quantity value of the battery and increasing of charge and discharge times, so that fuel conversion efficiency is reduced are solved.
In one aspect, there is provided a range extender control method in a running state, the range extender control method in the running state including: when the vehicle is determined to be in a running state, acquiring the current states of a slope angle value, a brake pedal and an electric door pedal of the vehicle; determining target power and target rotating speed of a range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table; and controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
In one embodiment, the determining the target power and the target rotation speed of the range extender of the vehicle according to the vehicle ramp angle value, the current states of the brake pedal and the electric door pedal and the preset power-rotation speed correspondence table includes: when the brake pedal is in an un-depressed state and the electric door pedal is in a depressed state, acquiring the current running speed of the vehicle, and determining the target power of a range extender of the vehicle according to the vehicle slope angle value and the running speed; and determining the target rotating speed of the range extender according to the target power and the corresponding relation table of the power and the rotating speed.
In one embodiment, the determining the target power and the target rotation speed of the range extender of the vehicle according to the vehicle ramp angle value, the current states of the brake pedal and the electric door pedal and the preset power-rotation speed correspondence table includes: and when the brake pedal is in a stepping state and the electric door pedal is in a non-stepping state, gradually reducing the target rotating speed of the range extender, and allowing the target rotating speed to be converted within a preset time.
In one embodiment, the determining the target power of the range extender of the vehicle according to the slope angle value of the vehicle and the running speed comprises: calculating to obtain the reference power of the range extender through a formula P4= (mgv +mgvsin alpha)/k; determining a target power according to the reference power; wherein P4 is the reference power of the range extender, k is a calibration coefficient, m is the mass of the vehicle, g is the gravitational acceleration, v is the current running speed of the vehicle, and alpha is the vehicle upward slope angle value.
In one embodiment, the determining the target power according to the reference power includes: acquiring a current residual electric quantity value of a battery pack of the vehicle; and when the residual electric quantity value is smaller than a preset electric quantity value, matching the reference power with the power and rotating speed corresponding relation table, and selecting one power which is larger than the reference power from the power and rotating speed corresponding relation table as a target power.
In one embodiment, the selecting a power greater than the reference power from the power-rotation speed correspondence table as the target power includes: and selecting the power closest to the reference power from the power larger than the reference power in the power-rotating speed corresponding relation table as the target power.
In one embodiment, the controlling the range extender to drive the motor of the vehicle at the target rotational speed and the target power further includes: starting timing when it is determined that the vehicle meets a preset timing condition; the preset condition is that the vehicle is in a bumpy road surface running state, and the target power and the target rotating speed are different from the current power and the current rotating speed of the range extender; and after the target timing duration is reached, controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
In one embodiment, the determining the target power according to the reference power further includes: and when an instruction for starting a power saving mode is received, matching the reference power with the power and rotating speed corresponding relation table, and selecting the power closest to the reference power from the power smaller than the reference power in the power and rotating speed corresponding relation table as the target power.
In another aspect, there is provided a range extender control device in a running state, the range extender control device in the running state including: the system comprises an acquisition module, a determination module and a control module, wherein the acquisition module is used for acquiring the current states of a slope angle value, a brake pedal and a door pedal of a vehicle when the vehicle is determined to be in a running state; the determining module is used for determining target power and target rotating speed of a range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table; the control module is used for controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
In another aspect, a vehicle is provided that includes the range extender control device described above in a traveling state.
According to the control method and device for the range extender in the driving state and the vehicle, when the vehicle is in the driving state, the current states of the vehicle slope angle value, the brake pedal and the electric door pedal are obtained, the target power and the target rotating speed of the range extender of the vehicle are determined according to the current states of the vehicle slope angle value, the brake pedal and the electric door pedal and the preset corresponding relation table of power and rotating speed, and the range extender is controlled to drive the motor of the vehicle at the target rotating speed and the target power, so that the problem that energy loss occurs when a battery pack is charged and discharged due to the fact that the residual electric quantity value of the battery is fed and the charging and discharging times are increased, and the fuel conversion efficiency is reduced is solved.
Drawings
FIG. 1 is a schematic diagram of the working of the range extender disclosed in the embodiment of the application;
fig. 2 is a schematic flow chart of a control method of a range extender in a driving state according to an embodiment of the present application;
fig. 3 is a schematic flow chart of step S20 in the range extender control method in the driving state shown in fig. 2;
fig. 4 is a schematic flow chart of step S22 in the range extender control method in the driving state shown in fig. 3;
fig. 5 is a schematic flow chart of step S30 in the range extender control method in the driving state shown in fig. 2;
fig. 6 is a schematic structural diagram of a range extender control device in a driving state according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the application, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the application may be practiced.
With the development of the automobile industry, electric automobiles are receiving more and more attention due to the increasing exhaustion of non-renewable energy sources and the increasing increase of environmental pollution. The range of the electric automobile is also a focus of attention, and when the vehicle-mounted rechargeable energy storage system cannot meet the range requirement, the vehicle-mounted auxiliary power supply device is turned on to supply electric energy for the power system, so that the range of the electric automobile is prolonged. However, under the working condition of larger electric energy consumption such as uphill, in order to maintain the current vehicle speed, the output instantaneous power P2 of the motor of the vehicle is increased, and the battery pack capacity is consumed in a large amount, so that the residual electric energy value of the battery is fed too much, and the fuel conversion efficiency is reduced. Therefore, how to solve the problem that the fuel conversion efficiency is reduced due to energy loss generated when the battery pack is charged and discharged due to the feeding of the remaining battery power value and the increase of the charge and discharge times is a urgent need of those skilled in the art.
In view of the foregoing, it is desirable to provide a solution to the above-mentioned technical problem, in which the problem of reduced fuel conversion efficiency caused by energy loss during charging and discharging of the battery pack due to the feeding of the remaining battery power and the increase of the number of charging and discharging times is solved, and details thereof will be described in the following embodiments.
Detailed description of the applicationthe present application provides a range extender control method in a traveling state, a range extender control device in a traveling state, and a vehicle having a range extender control device in a traveling state.
Please refer to fig. 1, which is a schematic diagram illustrating an operation of a range extender according to an embodiment of the present application. The range extender power generation driving motor has two paths, wherein one path S1 is charged and discharged to the motor through a battery pack, and the other path S2 is the range extender power generation driving motor directly driving the motor. In the running process of the vehicle, when the range extender directly drives the motor, the fuel conversion efficiency is higher.
Fig. 2 is a schematic flow chart of a control method of a range extender in a driving state according to an embodiment of the application. In an embodiment of the present application, the flow of the range extender control method in the driving state includes at least the following steps.
And S10, when the vehicle is determined to be in a running state, acquiring the current states of the slope angle value of the vehicle, the brake pedal and the electric door pedal.
S20, determining target power and target rotating speed of a range extender of the vehicle according to the slope angle value of the vehicle, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table.
And S30, controlling the range extender to drive a motor of the vehicle at the target rotating speed and the target power.
Referring to fig. 3, in the embodiment of the application, the step S20 at least includes the following steps.
S21, when the brake pedal is in a stepping state and the electric door pedal is in a non-stepping state, the target rotating speed of the range extender is gradually reduced, and the target rotating speed is allowed to be converted within a preset time.
In the embodiment of the application, specifically, when the brake pedal is in a depressed state and the electric door pedal is in an un-depressed state, since the total vehicle power P3 is greater than the difference between the output instantaneous power P2 of the range-increasing vehicle motor and the gravity component instantaneous power P1 and no more electric quantity is needed, the target rotation speed of the range extender is reduced step by step, and the target rotation speed is allowed to be converted within a preset time, wherein the preset time may be 1s.
In the embodiment of the application, when the brake pedal is in a depressed state and the electric door pedal is in an un-depressed state, the total vehicle power P3 is close to (i.e. approximately equal to) the difference between the output instantaneous power P2 of the range-extending vehicle motor and the gravity component instantaneous power P1; therefore, a reasonable range extender output power and range extender rotating speed control mode is adopted, so that energy loss caused by charge and discharge of a battery pack can be avoided, and the purpose of increasing fuel conversion efficiency is achieved.
S22, when the brake pedal is in an un-depressed state and the electric door pedal is in a depressed state, determining target power and target rotating speed of a range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table.
Referring to fig. 4, in an embodiment of the present application, the step S22 may include the following sub-steps.
S221, when the brake pedal is in a state of not being stepped on, when the electric door pedal is in a state of being stepped on, acquiring the current running speed of the vehicle, and determining the target power of the range extender of the vehicle according to the vehicle slope angle value and the running speed.
In an embodiment of the present application, specifically, the gravity traction force of the vehicle during downhill descent is F 1 F1 is calculated by the formula (1):
f1 =mgsin α formula (1)
Wherein m is the mass of the vehicle, g is the gravitational acceleration, v is the current running speed of the vehicle, α is the vehicle ramp angle value, and α may be greater than or equal to 0, and if the gravitational component instantaneous power of the vehicle is P1, P1 is calculated by formula (2):
p1=mgvsin α formula (2)
The output instantaneous power of the vehicle motor is P2, the P2 can be directly read, the total power of the vehicle is P3, and the P3 is obtained through calculation according to a formula (3):
p3=p2-P1 formula (3)
Calculated according to the formula (2) and the formula (3):
p3=p2-mgvsin α formula (4)
Calculating according to formula (4) to obtain P 2 ：
P2=p3+mgvsin α formula (5)
The reference power of the range extender is P4, and since the output power from the range extender to the motor is lossy, p2=kp4, where k is a calibration coefficient, and k can be calibrated according to the motor efficiency and the power generation efficiency of the range extender. Calculating according to P3= mgv and formula (5) to obtain the reference power of the range extender:
p4= (mgv +mgvsin α)/k equation (6)
And determining target power according to the reference power. In the embodiment of the application, the current residual electric quantity value of the battery pack of the vehicle is obtained, when the residual electric quantity value is smaller than a preset electric quantity value, the reference power is matched with the corresponding relation table of the power and the rotating speed, and one power which is larger than the reference power is selected from the corresponding relation table of the power and the rotating speed to be used as the target power. And selecting the power closest to the reference power from the power larger than the reference power in the power-rotating speed corresponding relation table as the target power.
In the embodiment of the application, when receiving the instruction of starting the power saving mode, the reference power is matched with the power and rotating speed corresponding relation table, and the power closest to the reference power is selected as the target power from the power smaller than the reference power in the power and rotating speed corresponding relation table.
S222, determining the target rotating speed of the range extender according to the target power and the corresponding relation table of the power and the rotating speed.
In the embodiment of the application, the range extender can be matched with the power required by the motor according to the actual rotation speed, but the output instantaneous power P2 of the motor of the vehicle is a variable value, the internal combustion engine can reach the optimal heat efficiency only at the specific rotation speed, and the efficiency of the range extender can be reduced, so that the range extender is calibrated with a plurality of working gears with the optimal heat efficiency, and a corresponding relation table of the power and the rotation speed is established, wherein the working gear of each range extender corresponds to a rotation speed interval. The number of working gears with the optimal thermal efficiency is exemplified by N, when the working gears of the range extender are 1 gear, the rotating speed of the range extender of the vehicle is 2000 revolutions, and the corresponding power is A; when the working gear of the range extender is 2 gears, the rotating speed of the range extender of the vehicle is 2300 revolutions, and the corresponding power is B; when the working gear of the range extender is N gear, the rotating speed of the range extender of the vehicle is 5000 revolutions, and the corresponding power is Z. Because the rotation speed and the power of the internal combustion engine are not in a linear relation, a table look-up method can be used for obtaining proper optimal gear number D, the range of D can be 0-N, and the working gear of each range extender corresponds to one rotation speed interval.
Referring to fig. 5, in an embodiment of the present application, the step S30 may include the following sub-steps.
S31, starting timing when the vehicle is determined to meet the preset time condition.
In the embodiment of the application, specifically, the preset condition is that the vehicle is in a bumpy road running state, and the target power and the target rotating speed are different from the current power and the current rotating speed of the range extender.
And S32, after the target timing duration is reached, controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
In summary, in the range extender control method in the driving state of the present application, when the vehicle is determined to be in the driving state, by acquiring the current states of the vehicle ramp angle value, the brake pedal and the electric door pedal, determining the target power and the target rotation speed of the range extender of the vehicle according to the current states of the vehicle ramp angle value, the brake pedal and the electric door pedal and the preset corresponding relation table of power and rotation speed, and controlling the range extender to drive the motor of the vehicle at the target rotation speed and the target power, thereby solving the problem that the fuel conversion efficiency is reduced due to energy loss when the battery pack is charged and discharged due to the increase of the feeding and charging/discharging times of the residual battery power value.
It should be understood that, although the steps in the flowcharts of fig. 2 to 5 are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the sub-steps or stages are performed necessarily occur in sequence, but may be performed alternately or alternately with at least a portion of the other steps or sub-steps of other steps.
Fig. 6 is a schematic structural diagram of a range extender control device in a driving state according to an embodiment of the present application. The application provides a range extender control device 100 in a driving state, which at least comprises an acquisition module 110, a determination module 120 and a control module 130. The acquisition module 110 is connected to the determination module 120, and the determination module 120 is connected to the control module 130.
The acquisition module 110 is configured to acquire current states of the vehicle ramp angle value, the brake pedal, and the electric door pedal when it is determined that the vehicle is in a running state.
The determining module 120 is configured to determine a target power and a target rotation speed of a range extender of the vehicle according to the vehicle ramp angle value, the current states of the brake pedal and the electric door pedal, and a preset power-rotation speed correspondence table. When the brake pedal is in a step-down state and the electric door pedal is in a non-step-down state, the total vehicle power P3 is larger than the difference between the output instantaneous power P2 of the range-extending vehicle motor and the gravity component instantaneous power P1, and more electric quantity is not needed, so that the target rotating speed of the range extender is reduced step by step, and the target rotating speed is allowed to be converted within a preset time, wherein the preset time can be 1s.
And when the brake pedal is in an un-depressed state and the electric door pedal is in a depressed state, acquiring the current running speed of the vehicle, and determining the target power of the range extender of the vehicle according to the vehicle slope angle value and the running speed. Specifically, the gravity traction force of the vehicle during downhill is F 1 F1 is calculated by the formula (1):
f1 =mgsin α formula (1)
Wherein m is the mass of the vehicle, g is the gravitational acceleration, v is the current running speed of the vehicle, α is the vehicle ramp angle value, and α may be greater than or equal to 0, and if the gravitational component instantaneous power of the vehicle is P1, P1 is calculated by formula (2):
p1=mgvsin α formula (2)
The output instantaneous power of the vehicle motor is P2, the P2 can be directly read, the total power of the vehicle is P3, and the P3 is obtained through calculation according to a formula (3):
p3=p2-P1 formula (3)
Calculated according to the formula (2) and the formula (3):
p3=p2-mgvsin α formula (4)
Calculating according to formula (4) to obtain P 2 ：
P2=p3+mgvsin α formula (5)
The reference power of the range extender is P4, and since the output power from the range extender to the motor is lossy, p2=kp4, where k is a calibration coefficient, and k can be calibrated according to the motor efficiency and the power generation efficiency of the range extender. Calculating according to P3= mgv and formula (5) to obtain the reference power of the range extender:
p4= (mgv +mgvsin α)/k equation (6)
And determining target power according to the reference power. In the embodiment of the application, the current residual electric quantity value of the battery pack of the vehicle is obtained, when the residual electric quantity value is smaller than a preset electric quantity value, the reference power is matched with the corresponding relation table of the power and the rotating speed, and one power which is larger than the reference power is selected from the corresponding relation table of the power and the rotating speed to be used as the target power. And selecting the power closest to the reference power from the power larger than the reference power in the power-rotating speed corresponding relation table as the target power.
In the embodiment of the application, when receiving the instruction of starting the power saving mode, the reference power is matched with the power and rotating speed corresponding relation table, and the power closest to the reference power is selected as the target power from the power smaller than the reference power in the power and rotating speed corresponding relation table.
And determining the target rotating speed of the range extender according to the target power and the corresponding relation table of the power and the rotating speed. In the embodiment of the application, the range extender can be matched with the power required by the motor according to the actual rotation speed, but the output instantaneous power P2 of the motor of the vehicle is a variable value, the internal combustion engine can reach the optimal thermal efficiency only at the specific rotation speed, and the efficiency of the range extender can be reduced, so that the range extender is calibrated with a plurality of working gears with the optimal thermal efficiency, and a corresponding relation table of the power and the rotation speed is established, wherein the working gear of each range extender corresponds to a rotation speed interval. The number of working gears with the optimal thermal efficiency is exemplified by N, when the working gears of the range extender are 1 gear, the rotating speed of the range extender of the vehicle is 2000 revolutions, and the corresponding power is A; when the working gear of the range extender is 2 gears, the rotating speed of the range extender of the vehicle is 2300 revolutions, and the corresponding power is B; when the working gear of the range extender is N gear, the rotating speed of the range extender of the vehicle is 5000 revolutions, and the corresponding power is Z. Because the rotation speed and the power of the internal combustion engine are not in a linear relation, a table look-up method can be used for obtaining proper optimal gear number D, the range of D can be 0-N, and the working gear of each range extender corresponds to one rotation speed interval.
The control module 130 is configured to control the range extender to drive the motor of the vehicle at the target rotational speed and the target power. In the embodiment of the application, timing is started when the vehicle is determined to meet the preset time condition, wherein the preset time condition is that the vehicle is in a bumpy road running state, and the target power and the target rotating speed are different from the current power and the current rotating speed of the range extender. And after the target timing duration is reached, controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
In summary, in the range extender control device in the driving state of the present application, when it is determined that the vehicle is in the driving state, the current states of the vehicle slope angle value, the brake pedal and the electric door pedal are obtained by the obtaining module 110, the determining module 120 determines the target power and the target rotation speed of the range extender of the vehicle according to the current states of the vehicle slope angle value, the brake pedal and the electric door pedal and the preset corresponding relation table of power and rotation speed, and the control module 130 controls the range extender to drive the motor of the vehicle at the target rotation speed and the target power, so that the problem that the fuel conversion efficiency is reduced due to energy loss when the battery pack is charged and discharged due to the increase of the feeding and charging/discharging times of the residual electric quantity value of the battery is solved.
Fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the application. The present application also provides a vehicle 10 including the range extender control device 100 in the running state in the embodiment shown in fig. 6.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. The control method of the range extender in the driving state is characterized by comprising the following steps of:
when the vehicle is determined to be in a running state, acquiring the current states of a slope angle value, a brake pedal and an electric door pedal of the vehicle;
determining target power and target rotating speed of a range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table;
and controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
2. The range extender control method in a running state according to claim 1, wherein the determining the target power and the target rotation speed of the range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal, and a preset power-rotation speed correspondence table includes:
when the brake pedal is in an un-depressed state and the electric door pedal is in a depressed state, acquiring the current running speed of the vehicle, and determining the target power of a range extender of the vehicle according to the vehicle slope angle value and the running speed;
and determining the target rotating speed of the range extender according to the target power and the corresponding relation table of the power and the rotating speed.
3. The range extender control method in a running state according to claim 1, wherein the determining the target power and the target rotation speed of the range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal, and a preset power-rotation speed correspondence table includes:
and when the brake pedal is in a stepping state and the electric door pedal is in a non-stepping state, gradually reducing the target rotating speed of the range extender, and allowing the target rotating speed to be converted within a preset time.
4. The range extender control method in a running state according to claim 2, wherein the determining the target power of the range extender of the vehicle based on the vehicle slope angle value and the running speed, includes:
calculating to obtain the reference power of the range extender through a formula P4= (mgv +mgvsin alpha)/k;
determining a target power according to the reference power;
wherein P4 is the reference power of the range extender, k is a calibration coefficient, m is the mass of the vehicle, g is the gravitational acceleration, v is the current running speed of the vehicle, and alpha is the vehicle upward slope angle value.
5. The travel range extender control method according to claim 4, wherein the determining the target power from the reference power includes:
acquiring a current residual electric quantity value of a battery pack of the vehicle;
and when the residual electric quantity value is smaller than a preset electric quantity value, matching the reference power with the power and rotating speed corresponding relation table, and selecting one power which is larger than the reference power from the power and rotating speed corresponding relation table as a target power.
6. The method according to claim 5, wherein selecting one of the power larger than the reference power from the power-rotation speed correspondence table as the target power, comprises:
and selecting the power closest to the reference power from the power larger than the reference power in the power-rotating speed corresponding relation table as the target power.
7. The range extender control method in a downhill state according to claim 1, wherein the controlling the range extender to drive the motor of the vehicle at the target rotational speed and the target power further comprises:
starting timing when it is determined that the vehicle meets a preset timing condition; the preset condition is that the vehicle is in a bumpy road surface running state, and the target power and the target rotating speed are different from the current power and the current rotating speed of the range extender;
and after the target timing duration is reached, controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
8. The travel range extender control method according to claim 4, wherein the determining the target power from the reference power further comprises:
and when an instruction for starting a power saving mode is received, matching the reference power with the power and rotating speed corresponding relation table, and selecting the power closest to the reference power from the power smaller than the reference power in the power and rotating speed corresponding relation table as the target power.
9. A range extender control device in a traveling state, characterized in that the range extender control device in the traveling state includes: the device comprises an acquisition module, a determination module and a control module, wherein,
the acquisition module is used for acquiring the current states of the vehicle slope angle value, the brake pedal and the electric door pedal when the vehicle is determined to be in a running state;
the determining module is used for determining target power and target rotating speed of a range extender of the vehicle according to the vehicle slope angle value, the current states of the brake pedal and the electric door pedal and a preset power and rotating speed corresponding relation table;
the control module is used for controlling the range extender to drive the motor of the vehicle at the target rotating speed and the target power.
10. A vehicle comprising the range extender control device in a running state according to claim 9.
CN202310337965.9A 2023-03-31 2023-03-31 Range extender control method and device in running state and vehicle Pending CN116674399A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116946141A (en) * 2023-09-18 2023-10-27 成都赛力斯科技有限公司 Control method and device of extended range electric automobile, electric automobile and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116946141A (en) * 2023-09-18 2023-10-27 成都赛力斯科技有限公司 Control method and device of extended range electric automobile, electric automobile and storage medium
CN116946141B (en) * 2023-09-18 2023-11-24 成都赛力斯科技有限公司 Control method and device of extended range electric automobile, electric automobile and storage medium

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