CN112977399A - Power control method and device, vehicle control unit and range-extended electric vehicle - Google Patents
Power control method and device, vehicle control unit and range-extended electric vehicle Download PDFInfo
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- CN112977399A CN112977399A CN202110277158.3A CN202110277158A CN112977399A CN 112977399 A CN112977399 A CN 112977399A CN 202110277158 A CN202110277158 A CN 202110277158A CN 112977399 A CN112977399 A CN 112977399A
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
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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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The application discloses power control method, device, vehicle control unit and extended range electric automobile, and extended range electric automobile is including setting up two speed change gear between generator, engine and driving motor, wherein, the method includes: when the actual residual electric quantity of the power battery is sufficient, controlling the two-gear transmission to enter a neutral gear or a 1-gear mode, and entering a pure electric mode; and when the actual residual electric quantity is insufficient and the actual vehicle speed is less than the preset vehicle speed, controlling the two-gear transmission to enter a 1-gear mode and enter a range-extending power generation mode, otherwise, controlling the two-gear transmission to enter a 2-gear mode, so that the engine is coupled with the driving motor and enters an engine direct-drive mode. Therefore, the problems that in the related art, when the extended range type electric automobile runs at a high speed, an engine cannot work in an optimal economic region, so that oil consumption is increased, fuel economy is poor, energy secondary conversion loss exists, driving efficiency is low, and different driving requirements of a driver cannot be met due to few working modes are solved.
Description
Technical Field
The application relates to the technical field of new energy vehicles, in particular to a power control method and device, a vehicle control unit and a range-extended electric vehicle.
Background
The range-extended electric vehicle is an electric vehicle which supplies electric energy through fuel oil under the condition that the electric quantity of a power battery is insufficient, has the advantages of zero emission of pure electric driving, low medium and low speed oil consumption, no worry of endurance mileage and the like, and has the following working principle:
when the power battery is sufficient in electric quantity, the power battery supplies power to the driving motor to provide the power requirement of the whole vehicle, and the engine does not participate in the work at the moment; when the electric quantity of the power battery is consumed to a certain degree, the engine is started, the generator is driven by the engine to charge the power battery, and the power battery is stopped when the power battery is fully charged.
However, the extended range electric vehicle still provides main power by the engine per se, and when the vehicle travels at a high speed, the output power of the engine is larger due to larger power demand, and the vehicle cannot work in an optimal economic interval, so that the fuel consumption is increased, the fuel economy is poor, the loss of energy secondary conversion exists, the driving efficiency is low, and the working mode is few, and different driving requirements of a driver cannot be met, so that a solution is needed urgently.
Content of application
The application provides a power control method and device of a range-extended electric vehicle, a vehicle control unit and the range-extended electric vehicle, and aims to solve the problems that in the related art, when the range-extended electric vehicle runs at a high speed, an engine cannot work in an optimal economic region, so that oil consumption is increased, fuel economy is poor, energy secondary conversion loss exists, driving efficiency is low, a few working modes cannot meet different driving requirements of a driver, and the like. An embodiment of a first aspect of the present application provides a power control method for an extended range electric vehicle, where the extended range electric vehicle includes a two-gear transmission disposed between a generator, an engine, and a driving motor, and the method includes the following steps: detecting the actual residual capacity of a power battery of the extended range electric automobile; when the actual residual electric quantity is larger than or equal to a preset threshold value, controlling the two-gear transmission to enter a neutral gear or a 1-gear, and enabling the extended range electric vehicle to enter a pure electric mode; and when the actual residual electric quantity is smaller than the preset threshold value, acquiring the actual speed of the extended range type electric automobile, and when the actual speed is smaller than the preset speed, controlling the two-gear transmission to enter the gear 1 and controlling the engine to charge the power battery, so that the extended range type electric automobile enters an extended range power generation mode, otherwise, controlling the two-gear transmission to enter the gear 2, so that the engine is coupled with the driving motor, and the extended range type electric automobile enters the engine direct drive mode.
Further, the method of the embodiment of the present application further includes: judging whether a driver has a power demand; if the power demand does not exist, controlling the power of the driving motor to be equal to the power of the engine, keeping the electric quantity balance of the power battery, and disconnecting a control switch between the driving motor and the power battery; if the power demand exists, the control switch is closed, so that the power of the driving motor is larger than the power of the engine, and the insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
Further, the determining whether the driver has a power demand includes: judging whether the driver triggers a power demand key or not, and judging that the power demand exists when the power demand key is triggered; or judging the actual opening degree of the extended range electric automobile, and judging that the power demand exists when the actual opening degree meets the power demand condition; or judging whether a power demand voice command of the driver is received or not, and judging that the power demand exists after the voice command is received.
Alternatively, the preset threshold may be 30% of full charge of the power battery, and the preset vehicle speed may be 80 km/h.
An embodiment of a second aspect of the present application provides a power control device of an extended range electric vehicle, where the extended range electric vehicle includes a two-gear transmission disposed between a generator, an engine, and a driving motor, and the device includes: the detection module is used for detecting the actual residual electric quantity of the power battery of the extended range electric automobile; the first control module is used for controlling the two-gear transmission to enter a neutral gear or a 1-gear mode when the actual residual electric quantity is larger than or equal to a preset threshold value, so that the extended range electric automobile enters a pure electric mode; and the second control module is used for acquiring the actual speed of the extended range electric automobile when the actual residual electric quantity is smaller than the preset threshold value, controlling the two-gear transmission to enter the gear 1 and controlling the engine to charge the power battery when the actual speed is smaller than the preset speed, so that the extended range electric automobile enters the extended range power generation mode, otherwise, controlling the two-gear transmission to enter the gear 2, so that the engine is coupled with the driving motor, and the extended range electric automobile enters the engine direct drive mode.
Further, the device of this application embodiment still includes: the judging module is used for judging whether a driver has a power demand; the third control module is used for controlling the power of the driving motor to be equal to the power of the engine when the power demand does not exist, keeping the electric quantity balance of the power battery and disconnecting a control switch between the driving motor and the power battery; and the fourth control module is used for closing the control switch when the power demand exists, so that the power of the driving motor is larger than the power of the engine, and the insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
Further, the determining module is further configured to: judging whether the driver triggers a power demand key or not, and judging that the power demand exists when the power demand key is triggered; or judging the actual opening degree of the extended range electric automobile, and judging that the power demand exists when the actual opening degree meets the power demand condition; or judging whether a power demand voice command of the driver is received or not, and judging that the power demand exists after the voice command is received.
Alternatively, the preset threshold may be 30% of full charge of the power battery, and the preset vehicle speed may be 80 km/h.
According to a third aspect of the present application, an embodiment provides a vehicle control unit, which includes the power control device of the extended range electric vehicle.
In a fourth aspect of the present application, an extended range electric vehicle is provided, which includes the vehicle control unit.
When driving at a high speed, the two-gear transmission is controlled to enable the power of the engine to be directly used for driving the motor, the loss of energy secondary conversion is avoided, the driving efficiency is improved, the power requirement of the whole vehicle can be met without large output power, the engine can work in an optimal economic interval, the oil consumption is effectively reduced, the fuel economy is improved, multiple working modes can be provided, the working modes of the vehicle are effectively enriched, different driving requirements of a driver are met, and the use experience of the driver is improved. Therefore, the problems that in the related art, when the extended range type electric automobile runs at a high speed, an engine cannot work in an optimal economic region, so that oil consumption is increased, fuel economy is poor, energy secondary conversion loss exists, driving efficiency is low, and different driving requirements of a driver cannot be met due to few working modes are solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a system diagram of an extended range electric vehicle according to an embodiment of the present application;
fig. 2 is a flowchart of a power control method of an extended range electric vehicle according to an embodiment of the present application;
fig. 3 is a flowchart of a power control method of an extended range electric vehicle according to an embodiment of the present application;
fig. 4 is a block diagram illustrating a power control apparatus of an extended range electric vehicle according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes a power control method and device, a vehicle control unit, and an extended range electric vehicle of an extended range electric vehicle according to an embodiment of the present application with reference to the drawings. In order to solve the problems that the engine cannot work in the optimal economic region when the extended range electric vehicle runs at high speed, so that the oil consumption is increased, the fuel economy is poor, the loss of energy secondary conversion exists, the driving efficiency is low, and the working modes are few and cannot meet different driving requirements of a driver in the related art, the application provides a power control method of the extended range electric vehicle, in the method, the power of the engine is directly used for driving a motor by controlling a two-gear transmission when the extended range electric vehicle runs at high speed, the loss of energy secondary conversion is avoided, the driving efficiency is improved, the power requirement of the whole vehicle can be met without large output power, the engine is enabled to work in the optimal economic region, the oil consumption is effectively reduced, the fuel economy is improved, multiple working modes can be provided, and the working modes of the vehicle are effectively enriched, the different driving demands of the driver are met, and the use experience of the driver is improved. Therefore, the problems that in the related art, when the extended range type electric automobile runs at a high speed, an engine cannot work in an optimal economic region, so that oil consumption is increased, fuel economy is poor, energy secondary conversion loss exists, driving efficiency is low, and different driving requirements of a driver cannot be met due to few working modes are solved.
Before introducing the power control method of the extended range electric vehicle, the extended range electric vehicle according to the embodiment of the present application is introduced, as shown in fig. 1, the extended range electric vehicle includes: the generator 1, the engine 2, the driving motor 3, the two-gear transmission 4 and the power battery 5, wherein the generator 1, the engine 2 and the two-gear transmission 4 form a range extender system of the range-extended electric vehicle. The two-gear transmission 4 is arranged between the generator 1, the engine 2 and the driving motor 3, and power among the generator 1, the engine 2 and the driving motor 3 is transmitted through the two-gear transmission 4. The driving motor 3 is used for driving the range-extended electric automobile to run; the power battery 5 is used for supplying electric energy to the driving motor 3 and performing electric energy storage.
It should be noted that the two-speed Transmission may be an Automatic two-speed Transmission, and fig. 1 illustrates an AMT (automated Manufacturing Technology, automated manual Transmission) type Automatic two-speed Transmission as an example, but the two-speed Transmission of the embodiment of the present application includes, but is not limited to, an AMT type Automatic two-speed Transmission, and may also include different structural types such as AT (Automatic Transmission, hydraulic Automatic Transmission)/DCT (Dual Clutch Transmission, Dual Clutch Automatic Transmission)/CVT (Continuous Variable Transmission), which may satisfy Automatic control and switching of two-speed gears, and is not particularly limited.
In the following embodiments, a power control method of an extended range electric vehicle is described by taking an AMT type automatic two-gear transmission as an example shown in fig. 1, wherein the two-gear transmission includes three operating states, which are respectively: neutral, 1 gear and 2 gear. The power control method of the extended range electric vehicle will be described in detail below.
Specifically, fig. 2 is a schematic flow chart of a power control method of an extended range electric vehicle according to an embodiment of the present application.
As shown in fig. 2, the power control method of the extended range electric vehicle includes the following steps:
in step S101, an actual remaining capacity of a power battery of the extended range electric vehicle is detected.
In the embodiment of the present application, the actual remaining capacity of the power battery may be determined by detecting the SOC (state of charge) of the power battery. The SOC is the ratio of the residual capacity of the power battery to the capacity of the power battery in a full-charge state, can be expressed by percentage, and has a value range of 0-1, when the SOC is 0, the power battery is completely discharged, and when the SOC is 1, the power battery is completely full.
For example, when the SOC of the power battery is detected to be 40%, the actual remaining capacity of the power battery may be determined to be 40%.
In step S102, when the actual remaining capacity is greater than or equal to the preset threshold, the two-gear transmission is controlled to enter the neutral gear or the 1-gear, so that the extended range electric vehicle enters the pure electric mode.
The preset threshold may be calibrated according to the actual capacity of the power battery, for example, the preset threshold may be 30% or 40% of full charge of the power battery, and the like, and is not particularly limited.
The power generation system and the driving system are completely separated in a neutral gear state, no power is transmitted between the two power shafts, the engine does not work, no power is transmitted to the driving motor and the generator, power of the driving motor is provided through the power battery, and at the moment, the range-extended electric automobile enters a pure electric mode; under the 1 st gear state, if the engine does not work, then increase form electric automobile still is in pure electric mode.
In this embodiment, when actual residual capacity is greater than or equal to and predetermines the threshold value, it is sufficient to indicate current residual capacity, and this application embodiment can be put into neutral gear or put into 1 shelves when power battery electric quantity is sufficient, and the engine is out of work this moment for the vehicle gets into pure electric mode, so that the vehicle passes through the electric energy when power battery electric quantity is sufficient and travels, reduces the fuel consumption of vehicle, improves the economic nature of fuel.
In step S103, when the actual remaining power is less than the preset threshold, the actual vehicle speed of the extended range electric vehicle is obtained, and when the actual vehicle speed is less than the preset vehicle speed, the two-gear transmission is controlled to enter the gear 1, and the engine is controlled to charge the power battery, so that the extended range electric vehicle enters the extended range power generation mode, otherwise, the two-gear transmission is controlled to enter the gear 2, so that the engine is coupled with the driving motor, so that the extended range electric vehicle enters the engine direct drive mode.
The preset vehicle speed may be calibrated according to an experiment, for example, the preset vehicle speed may be 80km/h or 90km/h, and the like, which is not particularly limited.
In the 1-gear state, if the engine starts to work, the range extender system starts to work, and the engine converts fuel oil into power to drive the generator to run and generate power; in the 1-gear state, after the range extender system starts to work, the electric energy generated by the generator can be used for charging the power battery and can also be directly used for driving the motor; under the 2 nd gear state, the engine can directly drive driving motor operation, enters the engine and directly drives the mode.
In this embodiment, when the actual remaining capacity is less than the preset threshold, it indicates that the current remaining capacity is low, at this time, in the embodiment of the present application, when the vehicle is in the medium-low speed running, the 1 st gear can be engaged to enter the range-extended power generation mode, and when the vehicle is in the high-speed running, the 2 nd gear can be engaged to enter the engine direct-drive mode.
In some embodiments, the method of embodiments of the present application further comprises: judging whether a driver has a power demand; if no power demand exists, controlling the power of the driving motor to be equal to the power of the engine, keeping the electric quantity balance of the power battery, and disconnecting a control switch between the driving motor and the power battery; if the power demand exists, the control switch is closed, so that the power of the driving motor is larger than the power of the engine, and the insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
It can be understood that, in the 2-gear state, the engine directly drives the driving motor to work, if the driver has no power demand, the control switch can be turned off, the power of the driving motor completely comes from the engine, and the engine enters the direct drive mode; under 2 grades of states, if the driver has the power demand, the control switch between joint driving motor and the power battery can be closed to this application embodiment, then the operation of engine and power battery common drive driving motor gets into the hybrid drive mode to exert the biggest driving force, satisfy driver's power demand, improve and drive experience. Wherein, the control switch can be a high-voltage relay.
It should be noted that, in the direct drive mode and the hybrid drive mode of the engine, the high modulation rate operating points of the engine, the generator and the driving motor can be selected by using the speed reducer, so as to improve the driving capability.
In some embodiments, in the 2 nd gear state, the embodiment of the present application may also implement switching between the direct drive mode and the hybrid drive mode of the engine by precisely controlling the flow direction of the high-voltage current, as shown in fig. 1, the flow direction of the arrow high-voltage current. In the pure electric mode, the power battery and the driving motor flow in two directions; in the range-extended power generation mode, the generator flows to the driving motor or flows to the power battery, and the power battery and the driving motor flow in two directions; in the direct drive mode of the engine, high-voltage current flows in two directions between the drive motor and the power battery; in the hybrid driving mode, the power battery flows to the driving motor and the generator, and the driving motor flows to the power battery during energy recovery.
In the embodiment, when the vehicle with understandable power demand is in a working condition requiring more power, such as rapid acceleration or high-speed overtaking, the driver needs the power urgently. In some embodiments, the present application may detect whether the driver has a power demand in various ways, which is not limited in particular.
As a possible implementation manner, it is determined whether the driver triggers the power demand button, so that when the power demand button is triggered, it is determined that there is a power demand.
In this case, the power demand key such as the sport mode button or the overtaking button may determine that the driver has a power demand, for example, when the driver activates the sport mode button.
As another possible implementation manner, the actual opening degree of the extended range electric vehicle is determined, so that when the actual opening degree meets the power demand condition, it is determined that the power demand exists.
It is understood that when the driver deeply steps on the accelerator pedal, it indicates that there is a demand for acceleration, and it can be determined that there is a demand for power for the driver.
As one possible implementation, it is determined whether a driver's power demand voice command is received, so that it is determined that there is a power demand after the voice command is received.
The driver can also determine the power demand through a voice instruction mode, for example, when the driver needs to overtake the vehicle, the driver can 'please enter a hybrid driving mode' through voice, and the voice module identifies the voice information of the driver and converts the voice information into the voice instruction.
To sum up, the embodiment of the application enriches the working modes of the extended range electric automobile, better satisfies the diversified driving requirements of the driver, improves the fuel economy of high-speed driving while keeping the high efficiency of the extended range electric automobile when the extended range electric automobile is driven at medium and low speeds, effectively avoids the problem that the driving efficiency of the extended range electric automobile is lower due to energy conversion when the extended range electric automobile is driven at high speed in the related technology, and can be equivalent to the efficiency of the fuel automobile when the extended range electric automobile is driven at high speed.
The power control method of the extended range electric vehicle will be described by an embodiment, wherein the control switch is a high voltage relay, as shown in fig. 3, and includes the following steps:
step S1: when the vehicle runs normally, the control unit starts to judge the electric quantity of the power battery, judges whether the SOC of the power battery is less than 30%, and if so, executes the step S2; if not, go to step S3;
step S2: controlling the two-gear transmission in the range extender system to be in a neutral gear or in a 1 gear and controlling the engine not to work, wherein at the moment, the automobile is in a pure electric mode, and returning to the step S1;
step S3: judging whether the vehicle speed is greater than or equal to 80km/h, if not, executing step S4; if so, go to step S5;
step S4: controlling a two-gear transmission in the range extender system to be in a 1 gear, controlling the engine to start working, enabling the engine to drive a generator to generate power so as to charge a power battery, and at the moment, enabling the automobile to be in a range-extending power generation mode and returning to the step S3;
step S5: controlling a two-gear transmission in the range extender system to be in a 2-gear state, directly coupling an engine and a driving motor, and entering an engine direct drive mode;
step S6: judging whether a power demand exists, if not, executing step S7; if so, go to step S8;
step S7: controlling the power of the driving motor to be equal to the power of the engine, keeping the electric quantity balance of the power battery, and disconnecting a high-voltage relay between the driving motor and the power battery;
step S8: and a high-voltage relay connected between the driving motor and the power battery is used for increasing the power of the driving motor to be larger than that of the engine, and the insufficient power is supplemented by the power battery to enter a hybrid driving mode.
According to the power control method of the extended range electric automobile provided by the embodiment of the application, when driving at a high speed, the power of the engine is directly used for driving the motor by controlling the two-gear transmission, the loss of energy secondary conversion is avoided, the driving efficiency is improved, the power requirement of the whole automobile can be met without large output power, the engine is enabled to work in the optimal economic region, the oil consumption is effectively reduced, the fuel economy is improved, various working modes can be provided, the working modes of the automobile are effectively enriched, different driving requirements of a driver are met, and the use experience of the driver is improved.
Next, a power control device of an extended range electric vehicle according to an embodiment of the present application will be described with reference to the drawings.
Fig. 4 is a block diagram schematically illustrating a power control apparatus of an extended range electric vehicle according to an embodiment of the present application.
The range-extended electric automobile comprises a two-gear transmission arranged among a generator, an engine and a driving motor. As shown in fig. 4, the power control apparatus 100 of the extended range electric vehicle includes: a detection module 110, a first control module 120, and a second control module 130.
The detection module 110 is configured to detect an actual remaining power of a power battery of the extended range electric vehicle; the first control module 120 is configured to control the two-gear transmission to enter a neutral gear or a 1-gear when the actual remaining power is greater than or equal to a preset threshold value, so that the extended range electric vehicle enters a pure electric mode; the second control module 130 is configured to obtain an actual vehicle speed of the extended range electric vehicle when the actual remaining power is less than a preset threshold, and control the two-gear transmission to enter the 1-gear and control the engine to charge the power battery when the actual vehicle speed is less than the preset vehicle speed, so that the extended range electric vehicle enters the extended range power generation mode, otherwise control the two-gear transmission to enter the 2-gear, so that the engine is coupled with the driving motor, so that the extended range electric vehicle enters the engine direct drive mode.
Further, the apparatus 100 of the embodiment of the present application further includes: the device comprises a judgment module, a third control module and a fourth control module. The judging module is used for judging whether a driver has a power demand or not; the third control module is used for controlling the power of the driving motor to be equal to the power of the engine when no power demand exists, keeping the electric quantity balance of the power battery and disconnecting a control switch between the driving motor and the power battery; and the fourth control module is used for closing the control switch when power demand exists, so that the power of the driving motor is larger than that of the engine, and insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
Further, the determining module is further configured to: judging whether a driver triggers a power demand key or not, and judging that a power demand exists when the power demand key is triggered; or judging the actual opening degree of the extended range electric automobile so as to judge that the power demand exists when the actual opening degree meets the power demand condition; or judging whether a power demand voice command of the driver is received or not, and judging that the power demand exists after the voice command is received.
Alternatively, the preset threshold value can be 30% of full charge of the power battery, and the preset vehicle speed can be 80 km/h.
It should be noted that the above explanation of the embodiment of the power control method of the extended range electric vehicle is also applicable to the power control device of the extended range electric vehicle of the embodiment, and is not repeated herein.
According to the power control device of the extended range electric automobile that this application embodiment provided, when going at a high speed, make the power of engine directly be used for driving motor through controlling two speed transmission, avoid the loss of energy secondary conversion, improve the drive efficiency, need not great output and can satisfy whole car power demand, make the engine keep working in optimum economy interval, effectively reduce oil consumption, improve the economic nature of fuel, and can provide multiple mode, effectively enrich the mode of vehicle, satisfy the different driving demands of driver, promote driver's use and experience.
In addition, the embodiment of the application also provides a vehicle control unit, which comprises the power control device of the extended range electric vehicle. This vehicle control unit, when going at a high speed, make the power of engine directly be used for driving motor through controlling two speed transmission, avoid the loss of energy secondary conversion, improve drive efficiency, need not great output and can satisfy whole car power demand, make the engine keep working in the optimum economy interval, effective oil consumption reduction improves fuel economy, and can provide multiple mode, effectively richen the mode of operation of vehicle, satisfy the different driving demand of driver, promote driver's use and experience.
In addition, the embodiment of the application also provides an extended range electric vehicle, which comprises the vehicle control unit. This increase form electric automobile can be when going at high speed, make the power of engine directly be used for driving motor through controlling two keep off the derailleur, avoid the loss of energy secondary conversion, improve the drive efficiency, need not great output and can satisfy whole car power demand, make the engine keep working in the optimum economy interval, effectively reduce the oil consumption, improve the fuel economy, and can provide multiple mode, effectively enrich the mode of vehicle, satisfy the different driving demand of driver, promote driver's use and experience.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
Claims (10)
1. A power control method of an extended range electric vehicle is characterized in that the extended range electric vehicle comprises a two-gear transmission arranged between a generator, an engine and a driving motor, wherein the method comprises the following steps:
detecting the actual residual capacity of a power battery of the extended range electric automobile;
when the actual residual electric quantity is larger than or equal to a preset threshold value, controlling the two-gear transmission to enter a neutral gear or a 1-gear, and enabling the extended range electric vehicle to enter a pure electric mode; and
and when the actual residual electric quantity is smaller than the preset threshold value, acquiring the actual speed of the extended range type electric automobile, and when the actual speed is smaller than the preset speed, controlling the two-gear transmission to enter the gear 1 and controlling the engine to charge the power battery, so that the extended range type electric automobile enters an extended range power generation mode, otherwise, controlling the two-gear transmission to enter the gear 2, so that the engine is coupled with the driving motor, and the extended range type electric automobile enters the engine direct drive mode.
2. The method of claim 1, further comprising:
judging whether a driver has a power demand;
if the power demand does not exist, controlling the power of the driving motor to be equal to the power of the engine, keeping the electric quantity balance of the power battery, and disconnecting a control switch between the driving motor and the power battery;
if the power demand exists, the control switch is closed, so that the power of the driving motor is larger than the power of the engine, and the insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
3. The method of claim 2, wherein said determining whether a driver demand for power exists comprises:
judging whether the driver triggers a power demand key or not, and judging that the power demand exists when the power demand key is triggered;
or judging the actual opening degree of the extended range electric automobile, and judging that the power demand exists when the actual opening degree meets the power demand condition;
or judging whether a power demand voice command of the driver is received or not, and judging that the power demand exists after the voice command is received.
4. The method according to claim 1, wherein the preset threshold is 30% full charge of the power battery, and the preset vehicle speed is 80 km/h.
5. The utility model provides a range extending electric automobile's power control device which characterized in that, range extending electric automobile is including setting up two speed transmission between generator, engine and driving motor, and wherein, the device includes:
the detection module is used for detecting the actual residual electric quantity of the power battery of the extended range electric automobile;
the first control module is used for controlling the two-gear transmission to enter a neutral gear or a 1-gear mode when the actual residual electric quantity is larger than or equal to a preset threshold value, so that the extended range electric automobile enters a pure electric mode; and
and the second control module is used for acquiring the actual speed of the extended range electric automobile when the actual residual electric quantity is smaller than the preset threshold value, controlling the two-gear transmission to enter the gear 1 and controlling the engine to charge the power battery when the actual speed is smaller than the preset speed, so that the extended range electric automobile enters the extended range power generation mode, otherwise, controlling the two-gear transmission to enter the gear 2, so that the engine is coupled with the driving motor, and the extended range electric automobile enters the engine direct drive mode.
6. The apparatus of claim 5, further comprising:
the judging module is used for judging whether a driver has a power demand;
the third control module is used for controlling the power of the driving motor to be equal to the power of the engine when the power demand does not exist, keeping the electric quantity balance of the power battery and disconnecting a control switch between the driving motor and the power battery;
and the fourth control module is used for closing the control switch when the power demand exists, so that the power of the driving motor is larger than the power of the engine, and the insufficient power is supplemented by the power battery, so that the extended range electric automobile enters a hybrid driving mode.
7. The apparatus of claim 6, wherein the determining module is further configured to:
judging whether the driver triggers a power demand key or not, and judging that the power demand exists when the power demand key is triggered;
or judging the actual opening degree of the extended range electric automobile, and judging that the power demand exists when the actual opening degree meets the power demand condition;
or judging whether a power demand voice command of the driver is received or not, and judging that the power demand exists after the voice command is received.
8. The apparatus of claim 5, wherein the preset threshold is 30% full charge of the power battery, and the preset vehicle speed is 80 km/h.
9. A vehicle control unit, comprising: the power control device of the extended range electric vehicle according to any one of claims 4 to 8.
10. An extended range electric vehicle, comprising: the vehicle control unit of claim 9.
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| CN112977399B (en) | 2022-12-27 |
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