CN111152774A - Hybrid vehicle energy management method, hybrid vehicle energy management device, electronic equipment and storage medium - Google Patents
Hybrid vehicle energy management method, hybrid vehicle energy management device, electronic equipment and storage medium Download PDFInfo
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- CN111152774A CN111152774A CN202010023468.8A CN202010023468A CN111152774A CN 111152774 A CN111152774 A CN 111152774A CN 202010023468 A CN202010023468 A CN 202010023468A CN 111152774 A CN111152774 A CN 111152774A
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
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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 provides a hybrid vehicle energy management method, a device, an electronic device and a storage medium, wherein the method comprises the following steps: determining a state of charge of the battery and a maximum torque of the drive motor when vehicle launch is detected; selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor; the power source of the vehicle is an internal combustion engine or a driving motor; if the selected power source of the vehicle is an internal combustion engine, selecting the power source for starting the internal combustion engine according to the charge state of the battery; BSG motors or starters for internal combustion engines; determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine; determining the working state of the driving motor according to the working state of the internal combustion engine, the optimal working condition line graph of the universal characteristic curve and the charge state of the battery; determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the charge state of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
Description
Technical Field
The present disclosure relates to the field of vehicle energy control technologies, and in particular, to a method and an apparatus for energy management of a hybrid vehicle, an electronic device, and a storage medium.
Background
The hybrid electric vehicle is the mainstream of the current new energy vehicle, can make up the defect of short driving range of the pure electric vehicle, can reduce the oil consumption of the traditional vehicle, has less pollutant emission of tail gas, and is more energy-saving and environment-friendly. The hybrid electric vehicle has a plurality of power sources such as an internal combustion engine and a motor, the structure is complex, and the key for playing the energy-saving advantage of the hybrid electric vehicle is how to effectively perform energy management optimization among the plurality of power sources.
In the prior art, some schemes make different working modes according to different optimum power curves of an internal combustion engine, required power values of an automobile and charge states of a storage battery, so that the internal combustion engine works in an interval near the optimum power curve, but the internal combustion engine only comprises power optimization under the starting of the internal combustion engine, does not comprise working conditions such as pure electric driving, braking energy recovery and the like, and does not comprise a complete energy management method of the hybrid electric vehicle.
At present, most of hybrid electric vehicles adopt a planetary gear structure, power source working points under various working conditions are optimized by adjusting the power of an internal combustion engine and a motor, and for the vehicles using other gearboxes, the rotating speed of the internal combustion engine is determined at a certain vehicle speed, and the working points cannot be adjusted through an optimal curve of the power.
Disclosure of Invention
The method solves the technical problem that a vehicle energy management method in the prior art is incomplete.
In order to solve the technical problem, the embodiment of the application discloses a hybrid vehicle energy management method, which comprises the following steps:
determining a state of charge of the battery and a maximum torque of the drive motor when vehicle launch is detected;
selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor; the power source of the vehicle is an internal combustion engine or a driving motor;
if the selected power source of the vehicle is an internal combustion engine, selecting the power source for starting the internal combustion engine according to the charge state of the battery; the power source of the internal combustion engine is a mild drive Starter Generator (BSG) motor or a Starter;
determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
determining the working state of the driving motor according to the working state of the internal combustion engine, the optimal working condition line graph of the universal characteristic curve and the charge state of the battery;
determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the charge state of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
Further, the method comprises the following steps:
determining that the vehicle is in a decelerating state;
controlling a driving motor to recover braking energy;
determining that the vehicle is in a stopped state;
and if the state of charge of the battery is smaller than the set minimum value of the state of charge of the battery, controlling the internal combustion engine to work at an idle speed, and controlling the BSG motor to charge the battery.
Further, selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor includes:
if the state of charge of the battery is larger than the set state of charge of the battery required by the running of the whole vehicle, and the maximum torque of the driving motor is larger than the torque required by the whole vehicle; selecting a driving motor as a power source of the vehicle, wherein the vehicle runs purely electrically;
if the state of charge of the battery is smaller than the set state of charge of the battery required by the running of the whole vehicle, or the maximum torque of the driving motor is smaller than the torque required by the whole vehicle; the internal combustion engine is selected as a power source of the vehicle, and the vehicle is driven by the internal combustion engine to run.
Further, selecting a power source for starting the internal combustion engine according to the state of charge of the battery comprises the following steps:
if the state of charge of the battery is larger than the set lowest battery state of charge, selecting a power source for starting the internal combustion engine as a BSG motor; controlling the BSG motor to start the belt pulley to drive the internal combustion engine to rotate, and controlling the BSG motor to stop working when the rotating speed of the internal combustion engine is higher than the idling rotating speed;
and if the battery charge state is less than or equal to the set lowest battery charge state, selecting a power source for starting the internal combustion engine as a starter.
Further, the method for determining the working state of the driving motor according to the working state of the internal combustion engine, the universal characteristic curve optimal working condition line diagram and the state of charge of the battery comprises the following steps:
determining a power-assisted limiting line and a charging limiting line according to the universal characteristic curve optimal working condition line graph;
and determining the working state of the driving motor according to the relative position relation between the position point of the working state of the internal combustion engine in the optimal working condition line diagram of the universal characteristic curve and the power-assisted limiting line and the charging limiting line and the charge state of the battery.
Further, determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the state of charge of the battery, and the method comprises the following steps:
if the required running power of the whole vehicle is smaller than the set running power value of the engine and the state of charge of the battery is larger than the set state of charge of the battery in the pure electric mode, switching the power source of the vehicle from the internal combustion engine to the driving motor in the running process;
and if the required power of the whole vehicle in running is larger than the set engine running power value or the state of charge of the battery is smaller than that of the battery in the pure electric mode, switching the power source of the vehicle in the running process from the driving motor to the internal combustion engine.
A second aspect of the embodiments of the present application discloses a hybrid vehicle energy management device, including:
the vehicle starting control device comprises a determining module, a judging module and a control module, wherein the determining module is used for determining the state of charge of a battery and the maximum torque of a driving motor when vehicle starting is detected;
the selection module is used for selecting a power source of the vehicle according to the charge state of the battery and the maximum torque of the driving motor, wherein the power source of the vehicle is an internal combustion engine or the driving motor;
the selection module is used for selecting a power source for starting the internal combustion engine according to the charge state of the battery when the power source of the vehicle is the internal combustion engine; the power source of the internal combustion engine is a BSG motor or a starter;
the determining module is used for determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
the determining module is used for determining the working state of the driving motor according to the working state of the internal combustion engine, the optimal working condition line graph of the universal characteristic curve and the charge state of the battery;
the determining module is used for determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the charge state of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
Further, the apparatus further comprises:
and the triggering module is used for triggering the driving motor to recover the braking energy when the vehicle is detected to be in a deceleration state.
A third aspect of an embodiment of the present application discloses an electronic device comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions, the at least one instruction, the at least one program, set of codes, or set of instructions being loaded and executed by the processor to implement a hybrid vehicle energy management method.
A fourth aspect of the embodiments of the present application discloses a computer storage medium having at least one instruction or at least one program stored therein, where the at least one instruction or the at least one program is loaded and executed by a processor to implement a hybrid vehicle energy management method.
By adopting the technical scheme, the application has the following beneficial effects:
the energy management method for the hybrid vehicle adopts a dual-motor hybrid power framework of the BSG motor and the driving motor, comprises a complete vehicle control strategy, can determine the conditions of charging, power assisting and single internal combustion engine working mode in the running process of the vehicle under the working state of the internal combustion engine, and selects the time for starting power assisting or charging and the optimal torque distribution strategy in the process, thereby ensuring the lowest oil consumption.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for energy management of a hybrid vehicle according to an embodiment of the present disclosure;
FIG. 2 is an optimal operating condition line diagram of universal characteristic curves of an internal combustion engine according to an embodiment of the present application;
FIG. 3 is a schematic diagram of the position of a driving motor according to an embodiment of the present application;
FIG. 4 is a detailed flowchart of a hybrid vehicle energy management method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a hybrid vehicle energy management device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. 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 one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The following describes a specific embodiment of a triggering method for vehicle coasting energy recovery of the present application, fig. 1 is a schematic flow chart of the triggering method for vehicle coasting energy recovery provided by the embodiment of the present application, and the present specification provides the method operation steps as in the embodiment or the flow chart, but more or less operation steps can be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. In practice, the system or server product may be implemented in a sequential or parallel manner (e.g., parallel processor or multi-threaded environment) according to the embodiments or methods shown in the figures. Specifically, as shown in fig. 1, the method may include:
referring to fig. 1, fig. 1 is a schematic flow chart of a hybrid vehicle energy management method according to an embodiment of the present application, where the hybrid vehicle energy management method includes the following steps:
s101, when the vehicle is detected to start, determining the state of charge of a battery and the maximum torque of a driving motor;
s102, selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor; the power source of the vehicle is an internal combustion engine or a driving motor;
in the embodiment of the application, if the state of charge of the battery is larger than the set state of charge of the battery required by the running of the whole vehicle, and the maximum torque of the driving motor is larger than the torque required by the whole vehicle; selecting a driving motor as a power source of the vehicle, wherein the vehicle runs purely electrically;
if the state of charge of the battery is smaller than the set state of charge of the battery required by the running of the whole vehicle, or the maximum torque of the driving motor is smaller than the torque required by the whole vehicle; the internal combustion engine is selected as the power source of the vehicle, and the vehicle is driven by the internal combustion engine to run, going to S103.
S103, selecting a power source for starting the internal combustion engine according to the charge state of the battery; the power source of the internal combustion engine is a mild drive Starter Generator (BSG) motor or a Starter;
in the embodiment of the application, if the state of charge of the battery is greater than the set lowest battery state of charge, a power source for starting the internal combustion engine is selected as a BSG motor; controlling the BSG motor to start the belt pulley to drive the internal combustion engine to rotate, and controlling the BSG motor to stop working when the rotating speed of the internal combustion engine is higher than the idling rotating speed;
and if the battery charge state is less than or equal to the set lowest battery charge state, selecting a power source for starting the internal combustion engine as a starter.
S104, determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine; the connecting line of the lowest point of the fuel consumption rate of the internal combustion engine at different rotating speeds can be obtained according to the universal characteristic curve data of the internal combustion engine.
S105, determining the working state of the driving motor according to the working state of the internal combustion engine, the universal characteristic curve optimal working condition line graph and the charge state of the battery;
in the embodiment of the application, fig. 2 is an optimal operating condition diagram of a universal characteristic curve of an internal combustion engine, and as shown in fig. 2, a power-assisted limiting line and a charging limiting line are determined according to the optimal operating condition line of the universal characteristic curve in the diagram;
determining the working state of the driving motor according to the relative position relation between a position point of the working state of the internal combustion engine in the optimal working condition line diagram of the universal characteristic curve and the power-assisted limiting line and the charging limiting line and the charge state of the battery;
if the position point is positioned below the charging limit line and the current charge state of the battery is smaller than the set required battery charge state, the internal combustion engine charges the battery through the driving motor until the electric quantity reaches the set electric quantity; the charging torque is the optimum torque at the current speed minus the torque required at the engine end.
If the position point is above the power-assisted limit line and the state of charge of the battery is greater than the set maximum value of the state of charge of the battery, the driving motor utilizes the electric energy in the battery to assist the internal combustion engine; the boost torque is the torque required at the current speed minus the optimal torque at the engine end.
If the position point is between the power-assisted limiting line and the charging limiting line and the state of charge of the battery is greater than the set minimum value of the state of charge of the battery, the internal combustion engine is not charged or discharged, and the driving motor does not work.
S106, determining a power source of the vehicle in the running process according to the determined required running power of the whole vehicle and the charge state of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
If the required running power of the whole vehicle is smaller than the set running power value of the engine and the state of charge of the battery is larger than the set state of charge of the battery in the pure electric mode, switching the power source of the vehicle from the internal combustion engine to the driving motor in the running process;
and if the required power of the whole vehicle in running is larger than the set engine running power value or the state of charge of the battery is smaller than that of the battery in the pure electric mode, switching the power source of the vehicle in the running process from the driving motor to the internal combustion engine.
In the embodiment of the application, the method further comprises the following steps:
s107, determining that the vehicle is in a deceleration state; when the brake pressure is greater than 0 and the vehicle speed is also greater than 0, the whole vehicle is judged to be in a deceleration state; controlling the driving motor to recover braking energy; the drive motor is used for recovering the braking energy, the recovered energy is stored in the 48V battery, the BSG motor and the internal combustion engine do not work, and compared with a single motor framework, the energy loss of dragging the internal combustion engine during the recovery of the braking energy can be reduced, and the energy for recovering the braking energy is improved;
s108, determining that the vehicle is in a stop state;
s109, judging whether the state of charge of the battery is smaller than the set minimum value of the state of charge of the battery, and if so, turning to S110; if not, the internal combustion engine, the driving motor and the BSG motor stop working.
And S110, controlling the internal combustion engine to work at an idle speed and controlling the BSG motor to charge the battery.
In the energy management method for the hybrid vehicle provided by the embodiment of the application, a 48V dual-motor hybrid architecture is adopted, as shown in fig. 3, the dual motors include a 48V BSG motor at the front end of the internal combustion engine and a 48V driving motor, that is, a motor, and the driving motors can be located at any positions of P2, P2.5, P3 and P4 in fig. 3.
The 48V double-motor hybrid power architecture can meet the working conditions of pure electric driving, power assisting, braking energy recovery, charging and the like, the control method adopts a torque optimization strategy under the fixed rotating speed to adjust the optimal working condition point of the internal combustion engine through the motor, and the BSG motor at the P0 position can assist the driving motor at the P2/P2.5/P3/P4 position in the starting and accelerating processes, so that the dynamic performance of intelligent starting and stopping and high-torque-demand starting is ensured, the good fuel economy of the whole vehicle is also ensured, and the cost is lower.
The following describes a specific embodiment of a hybrid vehicle energy management method, and fig. 4 is a detailed flowchart of a hybrid vehicle energy management method provided by an embodiment of the present application, including:
s401, when vehicle starting is detected, determining the state of charge of a battery and the maximum torque of a driving motor;
s402, judging whether the state of charge of the battery is larger than the set state of charge of the battery required by the running of the whole vehicle or not and whether the maximum torque of the driving motor is larger than the required torque of the whole vehicle or not; if the current is the same as the current, selecting the driving motor as a power source of the vehicle, and enabling the vehicle to run purely electrically;
if not, go to S403;
s403, selecting an internal combustion engine as a power source of the vehicle, wherein the vehicle is driven by the internal combustion engine to run;
s404, judging whether the charge state of the battery is larger than the set lowest battery charge state, if so, selecting a power source for starting the internal combustion engine as a BSG motor; controlling the BSG motor to start the belt pulley to drive the internal combustion engine to rotate, and controlling the BSG motor to stop working when the rotating speed of the internal combustion engine is higher than the idling rotating speed;
if not, go to S405;
s405: the power source to start the internal combustion engine is selected as the starter.
S406, determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
s407, acquiring a connecting line of the lowest points of the fuel consumption rates of the internal combustion engine at different rotating speeds according to the optimal working condition line graph of the universal characteristic curve;
determining a power-assisted limit line and a charging limit line according to a connection line of the lowest point of the fuel consumption rate of the internal combustion engine;
s408, determining the working state of the driving motor according to the relative position relation between the position point of the working state of the internal combustion engine in the universal characteristic curve optimal working condition line diagram and the power-assisted limiting line and the charging limiting line and the charge state of the battery;
if the position point is positioned below the charging limit line and the current charge state of the battery is smaller than the set required battery charge state, the internal combustion engine charges the battery through the driving motor until the electric quantity reaches the set electric quantity; the charging torque is the optimum torque at the current speed minus the torque required at the engine end.
If the position point is above the power-assisted limit line and the state of charge of the battery is greater than the set maximum value of the state of charge of the battery, the driving motor utilizes the electric energy in the battery to assist the internal combustion engine; the boost torque is the torque required at the current speed minus the optimal torque at the engine end.
If the position point is between the power-assisted limiting line and the charging limiting line and the state of charge of the battery is greater than the set minimum value of the state of charge of the battery, the internal combustion engine is not charged or discharged, and the driving motor does not work.
S409, determining a power source of the vehicle in the running process according to the determined required running power of the whole vehicle and the state of charge of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
If the required running power of the whole vehicle is smaller than the set running power value of the engine and the state of charge of the battery is larger than the set state of charge of the battery in the pure electric mode, switching the power source of the vehicle from the internal combustion engine to the driving motor in the running process;
and if the required power of the whole vehicle in running is larger than the set engine running power value or the state of charge of the battery is smaller than that of the battery in the pure electric mode, switching the power source of the vehicle in the running process from the driving motor to the internal combustion engine.
S410, determining that the vehicle is in a deceleration state; controlling a driving motor to recover braking energy; the drive motor is used for recovering the braking energy, the recovered energy is stored in the 48V battery, the BSG motor and the internal combustion engine do not work, and compared with a single motor framework, the energy loss of dragging the internal combustion engine during the recovery of the braking energy can be reduced, and the energy for recovering the braking energy is improved;
s411, determining that the vehicle is in a stop state;
s412, judging whether the state of charge of the battery is smaller than the set minimum value of the state of charge of the battery, if so, controlling the internal combustion engine to work at an idle speed, and controlling the BSG motor to charge the battery;
if not, go to S413;
and S413, stopping the internal combustion engine, the driving motor and the BSG motor.
In a second aspect of the embodiments of the present application, a hybrid vehicle energy management device is disclosed, which is based on the same inventive concept as the above method, and fig. 5 is a schematic structural diagram of the hybrid vehicle energy management device provided in the embodiments of the present application, and the device includes:
the vehicle starting control device comprises a determining module, a judging module and a control module, wherein the determining module is used for determining the state of charge of a battery and the maximum torque of a driving motor when vehicle starting is detected;
the selection module is used for selecting a power source of the vehicle according to the charge state of the battery and the maximum torque of the driving motor, wherein the power source of the vehicle is an internal combustion engine or the driving motor;
the selection module is used for selecting a power source for starting the internal combustion engine according to the charge state of the battery when the power source of the vehicle is the internal combustion engine; the power source of the internal combustion engine is a BSG motor or a starter;
the determining module is used for determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
the determining module is used for determining the working state of the driving motor according to the working state of the internal combustion engine, the optimal working condition line graph of the universal characteristic curve and the charge state of the battery;
the determining module is used for determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the charge state of the battery; the power source of the vehicle during running is an internal combustion engine and/or a driving motor.
In the embodiment of the present application, the apparatus further includes:
and the triggering module is used for triggering the driving motor to recover the braking energy when the vehicle is detected to be in a deceleration state.
A third aspect of an embodiment of the present application discloses an electronic device comprising a processor and a memory, the memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions, the at least one instruction, the at least one program, set of codes, or set of instructions being loaded and executed by the processor to implement a hybrid vehicle energy management method.
A fourth aspect of the embodiments of the present application discloses a computer storage medium, wherein at least one instruction or at least one program is stored in the storage medium, and the at least one instruction or the at least one program is loaded and executed by a processor to implement a hybrid vehicle energy management method.
Optionally, in this embodiment of the present application, the storage medium may be located in at least one network server of a plurality of network servers of a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It should be noted that: the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A hybrid vehicle energy management method, comprising the steps of:
determining a state of charge of the battery and a maximum torque of the drive motor when vehicle launch is detected;
selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor; the power source of the vehicle is an internal combustion engine or the driving motor;
if the selected power source of the vehicle is the internal combustion engine, selecting the power source for starting the internal combustion engine according to the charge state of the battery; the power source of the internal combustion engine is a mild drive Starter Generator (BSG) motor or a starter;
determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
determining the working state of the driving motor according to the working state of the internal combustion engine, the universal characteristic curve optimal working condition line graph and the state of charge of the battery;
determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the state of charge of the battery; the power source of the vehicle in the running process is an internal combustion engine and/or a driving motor.
2. The hybrid vehicle energy management method of claim 1, further comprising the steps of:
determining that the vehicle is in a decelerating state;
controlling the driving motor to recover braking energy;
determining that the vehicle is in a stopped state;
and if the state of charge of the battery is smaller than the set minimum value of the state of charge of the battery, controlling the internal combustion engine to work at an idle speed, and controlling the BSG motor to charge the battery.
3. The hybrid vehicle energy management method of claim 1 wherein selecting a power source for the vehicle based on the state of charge of the battery and the maximum torque of the drive motor comprises:
if the state of charge of the battery is larger than the set state of charge of the battery required by the running of the whole vehicle, and the maximum torque of the driving motor is larger than the torque required by the whole vehicle; selecting the driving motor as a power source of the vehicle, wherein the vehicle runs purely electrically;
if the state of charge of the battery is smaller than the set state of charge of the battery required by the running of the whole vehicle, or the maximum torque of the driving motor is smaller than the torque required by the whole vehicle; the internal combustion engine is selected as a power source of the vehicle that is driven by the internal combustion engine.
4. The hybrid vehicle energy management method of claim 1, wherein selecting a power source to start the internal combustion engine based on the state of charge of the battery comprises:
if the state of charge of the battery is larger than the set lowest battery state of charge, selecting a power source for starting the internal combustion engine as the BSG motor; controlling the BSG motor starting belt pulley to drive the internal combustion engine to rotate, and controlling the BSG motor to stop working when the rotating speed of the internal combustion engine is higher than the idling rotating speed;
and if the battery charge state is less than or equal to the set lowest battery charge state, selecting a power source for starting the internal combustion engine as the starter.
5. The hybrid vehicle energy management method according to claim 1, wherein determining the operating state of the drive motor from the operating state of the internal combustion engine, the maps of the universal characteristic curves and the state of charge of the battery comprises:
determining a power-assisted limiting line and a charging limiting line according to the universal characteristic curve optimal working condition line graph;
and determining the working state of the driving motor according to the relative position relation between the position point of the working state of the internal combustion engine in the universal characteristic curve optimal working condition line diagram and the power-assisted limiting line and the charging limiting line and the charge state of the battery.
6. The hybrid vehicle energy management method of claim 1, wherein determining the power source of the vehicle during travel based on the determined power demand for vehicle travel and the state of charge of the battery comprises:
if the required running power of the whole vehicle is smaller than the set running power value of the engine and the state of charge of the battery is larger than the set state of charge of the battery in the pure electric mode, switching the power source of the vehicle from the internal combustion engine to the driving motor in the running process;
and if the required power of the whole vehicle in running is larger than the set engine running power value or the state of charge of the battery is smaller than the state of charge of the battery in the pure electric mode, switching the power source of the vehicle in the running process from the driving motor to the internal combustion engine.
7. A hybrid vehicle energy management device, comprising:
the vehicle starting control device comprises a determining module, a judging module and a control module, wherein the determining module is used for determining the state of charge of a battery and the maximum torque of a driving motor when vehicle starting is detected;
the selection module is used for selecting a power source of the vehicle according to the state of charge of the battery and the maximum torque of the driving motor, wherein the power source of the vehicle is an internal combustion engine or the driving motor;
the selection module is used for selecting a power source for starting the internal combustion engine according to the charge state of the battery when the power source of the vehicle is the internal combustion engine; the power source of the internal combustion engine is a BSG motor or a starter;
the determining module is used for determining the working state of the internal combustion engine and the optimal working condition line graph of the universal characteristic curve of the internal combustion engine;
the determining module is used for determining the working state of the driving motor according to the working state of the internal combustion engine, the optimal working condition line graph of the universal characteristic curve and the state of charge of the battery;
the determining module is used for determining a power source of the vehicle in the driving process according to the determined required power for driving the whole vehicle and the state of charge of the battery; the power source of the vehicle in the running process is an internal combustion engine and/or a driving motor.
8. The hybrid vehicle energy management device of claim 7, further comprising:
and the triggering module is used for triggering the driving motor to recover the braking energy when the vehicle is detected to be in a deceleration state.
9. An electronic device, comprising a processor and a memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by the processor to implement the hybrid vehicle energy management method of any of claims 1-6.
10. A computer storage medium having at least one instruction or at least one program stored therein, the at least one instruction or at least one program being loaded and executed by a processor to implement the hybrid vehicle energy management method of any of claims 1-6.
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Application publication date: 20200515 |