CN111645538B - Method for improving endurance mileage of electric vehicle - Google Patents
Method for improving endurance mileage of electric vehicle Download PDFInfo
- Publication number
- CN111645538B CN111645538B CN202010539116.8A CN202010539116A CN111645538B CN 111645538 B CN111645538 B CN 111645538B CN 202010539116 A CN202010539116 A CN 202010539116A CN 111645538 B CN111645538 B CN 111645538B
- Authority
- CN
- China
- Prior art keywords
- electric vehicle
- rotating speed
- motor
- starting
- mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
- B62K23/02—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips hand actuated
- B62K23/04—Twist grips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/429—Current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a method for improving the endurance mileage of an electric vehicle, wherein the electric vehicle is provided with an energy-saving endurance mode and a conventional running mode, an intermediate starting rotating speed is set between an initial rotating speed and a rated rotating speed, and the intermediate starting rotating speed is greater than the initial rotating speed and less than the rated rotating speed; the control steps of the energy-saving endurance mode comprise: s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be larger than the rated current; s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current; s30), when the electric vehicle is in a cruising operation mode, the controller sets the working current of the motor to be less than the rated current; the invention can obviously improve the endurance mileage of the electric vehicle when in the energy-saving endurance mode by selectively setting the energy-saving endurance mode and the conventional driving mode, has universality and is particularly suitable for being applied to electric two-wheeled vehicle products.
Description
Technical Field
The invention belongs to the field of electric vehicles, particularly relates to a method for improving the endurance mileage of an electric vehicle, and is particularly suitable for being applied to electric two-wheeled vehicle products.
Background
The driving mileage of an electric vehicle is a core factor for determining the performance of the electric vehicle, and people hope to break through the driving mileage of the electric vehicle through various technical means. It is common knowledge that the factors for determining the driving range of an electric vehicle mainly include the efficiency of the electric vehicle motor and the capacity of the battery, however, how to further increase the driving range of the electric vehicle on the basis of maintaining the same motor efficiency and the same battery capacity is a technical problem in the field.
The invention patent with publication number CN109291933A discloses a method and a system for improving the endurance mileage of an electric vehicle: acquiring daily driving information of a vehicle in a fixed driving mode; acquiring actual torque demand values at different moments under the same vehicle speed and the same accelerator opening degree from the daily driving information; carrying out mean value statistics on a series of acquired actual torque demand values to obtain a statistical value; taking the statistical value as an adjustment basis, adjusting theoretical required values of the motor torque output corresponding to the vehicle speed and the accelerator opening in the calibration pulse spectrum, wherein the adjusted theoretical required values are closer to the statistical value than before adjustment; the working principle of the method is that a proper torque demand value is adjusted and optimized according to daily historical travel data for users, so that the energy consumption of unit mileage of the electric vehicle can be improved, however, the method is transitionally dependent on the historical travel data of a specific user, has no universality, and is likely to have negative influence on the endurance mileage when being used by different users. And the calculation control process of the endurance mileage method is complex, and the method is mainly suitable for being applied to the field of electric automobiles, and the technology cannot be directly applied to electric two-wheel vehicle products due to the manufacturing cost, the control structure characteristics of the technology and the like.
Therefore, the applicant hopes to seek technical solutions to improve the driving range of the electric vehicle based on years of experience focusing on development experience and accumulated application data in the field of driving of electric vehicles.
Disclosure of Invention
In view of the above, the present invention provides a method for increasing the endurance mileage of an electric vehicle, which can significantly increase the endurance mileage of the electric vehicle when in an energy-saving endurance mode by selectively setting the energy-saving endurance mode and the conventional driving mode, has universality, and is particularly suitable for being applied to electric two-wheeled vehicle products.
Before introducing the technical scheme of the invention, the applicant pays attention to that the conventional starting modes of the electric vehicle all adopt: the user is used for rotating the electric vehicle handle to set the working current of the motor under the starting instruction in real time, so that the required motor rotating speed is obtained through adjustment, after the rotating handle sets the rotating angle, the working current is in a rated state, and in the whole starting process and the operation working process, the working current of the motor cannot change according to the rotating speed of the motor and is always kept in the rated current state. However, as the applicant finds, after the targeted research and development and detection, that after the start instruction is determined, the working current is in a fixed state (the working current corresponding to the start instruction is preset and input according to the target driving curve), if the working current is set to be too large, the electric quantity of the battery jar is greatly consumed, and further, the endurance mileage of the electric vehicle is obviously and negatively affected, if the working current is set to be too small, the starting acceleration performance is negatively affected, not only the starting acceleration experience is not facilitated, but also more electric quantity of the battery jar is caused in the starting process, so that the target driving curve in the prior art usually sets the rated current within an applicable value range, and compatibly considers the requirements of accelerated start and steady-state operation, however, the actually set value is considered unilaterally, and is not the optimal scheme for realizing the rapid start requirement during accelerated start, the optimal scheme for realizing the electricity-saving operation in the steady-state operation is not provided; therefore, after the applicant verifies the implementation effect, the technical scheme of the application is finally provided.
The technical scheme adopted by the invention is as follows:
a method for improving the endurance mileage of an electric vehicle is characterized in that the electric vehicle is provided with a motor driving system comprising a motor and a controller, and the motor driving system realizes power supply input through a storage battery of the electric vehicle; the controller inputs a starting instruction through an electric vehicle handle, and drives the motor to accelerate starting according to the starting instruction, the motor is correspondingly provided with a rated current and a rated rotating speed under the starting instruction, the rated rotating speed refers to the maximum rotating speed of the motor under the rated current, the electric vehicle is provided with an energy-saving cruising mode and a conventional driving mode, and the energy-saving cruising mode comprises the following steps: when the controller receives a starting instruction input by a rotating handle of the electric vehicle, the motor is driven to accelerate from an initial rotating speed to a rated rotating speed; wherein the content of the first and second substances,
setting an intermediate starting rotating speed between the initial rotating speed and the rated rotating speed, wherein the intermediate starting rotating speed is greater than the initial rotating speed and less than the rated rotating speed; defining the process of accelerating the motor from the initial rotating speed to the middle starting rotating speed as a first endurance starting mode of the electric vehicle, defining the process of accelerating the motor from the middle starting rotating speed to the rated rotating speed as a second endurance starting mode of the electric vehicle, and defining the process of operating the motor at the rated rotating speed as an endurance operating mode of the electric vehicle; the control step of the energy-saving endurance mode comprises the following steps:
s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be larger than the rated current;
s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current;
s30), when the electric vehicle is in a cruising operation mode, the controller sets the working current of the motor to be less than the rated current.
Preferably, when the output voltage of the electric vehicle battery is equal to or less than 92-98% of the rated voltage of the electric vehicle battery, the electric vehicle runs in a conventional running mode; when the output voltage of the electric vehicle battery is greater than 92-98% of the rated voltage of the electric vehicle battery, the electric vehicle runs in an energy-saving cruising mode.
Preferably, the output voltage range of the storage battery of the electric vehicle is 48-72V; the rated current range is 8-40A; the rated rotating speed range is 300-1000 rpm.
Preferably, the initial rotation speed is zero speed or non-zero speed, and the difference between the intermediate starting rotation speed and the initial rotation speed ranges from 80 to 200 revolutions per minute.
Preferably, when the electric vehicle is in the first endurance starting mode, the controller sets the working current of the motor to be 1.1-1.3 times of the rated current.
Preferably, the initial rotation speed is zero speed, and the rated rotation speed range is 700-; setting a first-stage middle starting rotating speed and a second-stage middle starting rotating speed between the initial rotating speed and the rated rotating speed, wherein the range of the first-stage middle starting rotating speed is 80-150 revolutions per minute, and the range of the second-stage middle starting rotating speed is 300-400 revolutions per minute; the method comprises the following steps that a process of accelerating a motor from an initial rotating speed to a first-stage intermediate starting rotating speed is defined as a first primary cruising starting mode of the electric vehicle, and a process of accelerating the motor from the first-stage intermediate starting rotating speed to a second-stage intermediate starting rotating speed is defined as a first final-stage cruising starting mode of the electric vehicle;
the step S10) is: when the electric vehicle is in a first primary endurance starting mode, the controller sets the working current of the motor to be 1.2-1.3 times of the rated current; when the electric vehicle is in the first final-stage cruising starting mode, the controller sets the working current of the motor to be 1.1-1.19 times of the rated current.
Preferably, when the electric vehicle is in a cruising operation mode, the controller sets the working current of the motor to 0.8-0.9 times of the rated current.
Preferably, the motor is a permanent magnet synchronous hub motor, and the output power range of the permanent magnet synchronous hub motor is 400-1500W.
It should be noted that the output voltage range, the rated current range and the rated rotation speed range of the electric vehicle battery related to the present application can be determined according to the actual configuration requirements of the electric vehicle, and the present application has no particular limitation in implementation, and the innovative scheme provided by the present application can be applied to improve the endurance mileage of the electric vehicle.
The invention creatively provides that after a user sets a specific starting instruction through a handle, the starting instruction is used as a driving operation target, a controller sets a first endurance starting mode, a second endurance starting mode and an endurance operation mode for a motor, and the specific control process adopts the following steps: when the vehicle is in the first endurance starting mode, the working current is set to be larger than the rated current, so that the starting instruction can be quickly responded, the acceleration is improved, and the starting time is shortened; when the intermediate starting rotating speed is reached, the second endurance starting mode with the working current equal to the rated current is switched into, at the moment, the motor of the electric vehicle can be quickly increased to the target rated rotating speed under the starting acceleration of the first endurance starting mode, the consumed current of the battery unit mileage is effectively reduced, and simultaneously, after the motor is kept at the target rated rotating speed, because the motor of the electric vehicle finishes the starting work and enters a stable running state, because the set rated current is usually higher than the optimal working current required during the steady-state running for realizing the good quick starting, the invention can be further switched into the endurance running mode with the working current smaller than the rated current after the starting work is finished, so that the motor of the electric vehicle can be ensured to enter the steady-state electricity-saving running state, the rotating speed of the motor can be slightly lower than the rated rotating speed, but a user can not have obvious feeling during the stable running, in the most preferable energy-saving endurance mode; the technical scheme of the invention can obviously improve the endurance mileage of the electric vehicle, has simple control process, does not need to consume separate device cost, can be directly applied to the existing motor driving system, has universality, does not cause uncertain technical effect of improving the endurance mileage due to the replacement of a driving user, and is particularly suitable for being applied to electric two-wheel vehicle products.
Drawings
Fig. 1 is a block diagram of the control procedure of the energy-saving cruising mode in embodiment 1 of the present invention;
FIG. 2 is a graph of the operating current versus the rotational speed of the motors of example 1 and comparative example 1;
fig. 3 is a block diagram of a control procedure of the energy-saving cruising mode in embodiment 2 of the present invention;
fig. 4 is a graph of the motor operating current versus the rotational speed for example 2 and comparative example 2.
Detailed Description
The embodiment of the invention discloses a method for improving the endurance mileage of an electric vehicle, wherein the electric vehicle is provided with a motor driving system comprising a motor and a controller, and the motor driving system realizes power supply input through an electric vehicle battery; the controller inputs a starting instruction through an electric vehicle handle, and drives the motor to start in an accelerating mode according to the starting instruction, the motor is correspondingly provided with rated current and rated rotating speed under the starting instruction, the rated rotating speed refers to the maximum rotating speed of the motor under the rated current, and the electric vehicle is characterized by being provided with an energy-saving cruising mode and a conventional driving mode, and the energy-saving cruising mode comprises the following steps: when the controller receives a starting instruction input by a rotating handle of the electric vehicle, the driving motor is accelerated from the initial rotating speed to the rated rotating speed; the method comprises the following steps that an intermediate starting rotating speed is set between the initial rotating speed and the rated rotating speed, and the intermediate starting rotating speed is greater than the initial rotating speed and less than the rated rotating speed; defining a process of accelerating the motor from the initial rotating speed to the middle starting rotating speed as a first endurance starting mode of the electric vehicle, defining a process of accelerating the motor from the middle starting rotating speed to the rated rotating speed as a second endurance starting mode of the electric vehicle, and defining a process of operating the motor at the rated rotating speed as an endurance operating mode of the electric vehicle; the control steps of the energy-saving endurance mode comprise: s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be larger than the rated current; s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current; s30), when the electric vehicle is in a continuous driving running mode, the controller sets the working current of the motor to be less than the rated current.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
Example 1: a method for improving the endurance mileage of an electric vehicle is provided, the electric vehicle is provided with a motor driving system comprising a motor and a controller, and the motor driving system realizes power supply input through an electric vehicle battery; the controller inputs a starting instruction through the electric vehicle handle, and drives the motor to accelerate according to the starting instruction, the motor is correspondingly provided with rated current and rated rotating speed under the starting instruction, the rated rotating speed refers to the maximum rotating speed of the motor under the rated current, and the electric vehicle is characterized by being provided with an energy-saving cruising mode and a conventional driving mode, and the energy-saving cruising mode comprises the following steps: when the controller receives a starting instruction input by a rotating handle of the electric vehicle, the driving motor is accelerated from the initial rotating speed to the rated rotating speed;
in the embodiment, an intermediate starting rotation speed is set between the initial rotation speed and the rated rotation speed, and the intermediate starting rotation speed is greater than the initial rotation speed and less than the rated rotation speed; preferably, in the present embodiment, the initial rotation speed is zero speed, and the intermediate start rotation speed ranges from 80 to 200 rpm, specifically, in the present embodiment, the intermediate start rotation speed is 100 rpm;
defining the process of accelerating the motor from zero speed to middle starting rotating speed as a first endurance starting mode of the electric vehicle, defining the process of accelerating the motor from the middle starting rotating speed to rated rotating speed as a second endurance starting mode of the electric vehicle, and defining the process of operating the motor at the rated rotating speed as an endurance operating mode of the electric vehicle; the control steps of the energy-saving endurance mode comprise:
s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be larger than the rated current;
s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current;
s30), when the electric vehicle is in a cruising operation mode, the controller sets the working current of the motor to be less than the rated current.
Preferably, in the embodiment, when the output voltage of the electric vehicle battery is equal to or less than 95% of the rated voltage of the electric vehicle battery, the electric vehicle runs in a normal running mode; when the output voltage of the electric vehicle battery is greater than 95% of the rated voltage of the electric vehicle battery, the electric vehicle runs in an energy-saving cruising mode; of course, in other embodiments, the specific selection may be made within a range of 92 to 98%, which is not particularly limited in the application; the applicant suggests through experiments that when the output voltage of the electric vehicle battery is equal to or less than 92% of the rated voltage of the electric vehicle battery, the electric vehicle battery is operated in a conventional driving mode, otherwise, the electric vehicle battery still adopts an energy-saving endurance mode, and more battery electric quantity can be consumed due to the need of improving the working current when the electric vehicle battery is started, so that negative technical effects on endurance mileage can be realized; the conventional driving mode referred to in the application refers to a driving control mode in which rated working current is adopted in the prior art;
preferably, in the present embodiment, the motor is a permanent magnet synchronous hub motor, and the output power range thereof is 400-; the output voltage range of the storage battery of the electric vehicle is 48-72V; the rated current range is 8-40A; the rated rotating speed range is 300-1000 rpm.
Preferably, in the embodiment, when the electric vehicle is in the first endurance starting mode, the controller sets the working current of the motor to be 1.1-1.3 times of the rated current; when the electric vehicle is in a continuous-driving running mode, the controller sets the working current of the motor to be 0.8-0.9 times of the rated current.
In order to verify the technical effect of the embodiment 1, the applicant performs a comparative test, the output voltage of the storage battery of the electric vehicle is 48V, and the electric vehicle is operated in an energy-saving cruising mode and a conventional driving mode respectively, wherein the comparison is determined according to an input starting instruction: rated current is 8A, and rated rotating speed is 300 r/min;
when the energy-saving endurance mode is adopted, the intermediate starting rotating speed is 100 revolutions per minute, and the control steps of the energy-saving endurance mode are as follows:
s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be 1.1 times of the rated current;
s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current;
s30), when the electric vehicle is in a cruising operation mode, the controller sets the working current of the motor to be 0.85 times of the rated current.
Comparative example 1: an electric vehicle identical to that of the above-described embodiment 1 was used, except that the comparative example 1 was operated in a conventional running mode, the output voltage of the battery of the electric vehicle was 48V, and it was determined according to the input start instruction: the rated current is 8A, and the rated rotating speed is 300 r/min.
Referring further to the corresponding curve of the operating current and the rotating speed of the motor shown in fig. 2, it is obvious that the starting of the embodiment 1 can be realized quickly, and meanwhile, the power consumption of the battery can be effectively saved during the steady operation, and through actual comparison, it is found that the endurance mileage of the embodiment 1 can be increased by at least about 12% compared with that of the comparative example 1.
Example 2: the electric vehicle is the same as that in the above embodiment 1 except that in the embodiment 2, the initial rotation speed is zero speed, and the rated rotation speed range is 700-1000 rpm; setting a primary intermediate starting rotating speed and a secondary intermediate starting rotating speed between the initial rotating speed and the rated rotating speed, wherein the range of the primary intermediate starting rotating speed is 80-150 revolutions per minute, and the range of the secondary intermediate starting rotating speed is 300-400 revolutions per minute; the method comprises the following steps that a process of accelerating a motor from an initial rotating speed to a first-stage intermediate starting rotating speed is defined as a first primary cruising starting mode of the electric vehicle, and a process of accelerating the motor from the first-stage intermediate starting rotating speed to a second-stage intermediate starting rotating speed is defined as a first final-stage cruising starting mode of the electric vehicle; particularly preferably, in the embodiment 2, the output voltage of the electric vehicle battery is 72V, the rated current is 20A, the rated rotation speed is 800 rpm, the primary intermediate starting rotation speed is 100 rpm, and the secondary intermediate starting rotation speed is 400 rpm; the control steps of the energy-saving endurance mode are as follows:
s10)', when the electric vehicle is in the first primary endurance starting mode, the controller sets the working current of the motor to be 1.25 times of the rated current; when the electric vehicle is in a first final-stage endurance starting mode, the controller sets the working current of the motor to be 1.1 times of the rated current;
s20)', when the electric vehicle is in the second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current;
s30)', when the electric vehicle is in the cruising operation mode, the controller sets the operating current of the motor to 0.9 times the rated current.
Comparative example 2: an electric vehicle identical to that of the embodiment 2 is adopted, except that the comparative example 2 is operated in a conventional running mode, the output voltage of the battery of the electric vehicle is 72V, and the output voltage is determined according to an input starting command: the rated current is 20A, and the rated rotating speed is 800 r/min.
Referring further to the corresponding curve of the motor working current and the rotating speed shown in fig. 4, it is apparent that the embodiment 2 can rapidly realize the power-saving start, and at the same time, the power consumption of the battery can be effectively saved during the steady-state operation, and through actual comparison, it is found that the endurance mileage of the embodiment 2 can be increased by at least about 10% compared with that of the comparative example 2.
Example 3: the same electric vehicle as in embodiment 1 above was used, and the control procedure of the energy saving cruising mode in embodiment 1 was used, except that in embodiment 3, the initial rotation speed was 300 rpm, the intermediate starting rotation speed was 500 rpm, and the rated rotation speed was 900 rpm.
Compared with the conventional driving mode, the driving range of the vehicle in the embodiment 3 can be further improved by about 5% on the basis of the embodiment 1.
The embodiment creatively provides that after a user sets a specific starting instruction through a handle, the starting instruction is used as a driving operation target, the controller sets a first endurance starting mode, a second endurance starting mode and an endurance operation mode for the motor, and the specific control process adopts: when the vehicle is in the first endurance starting mode, the working current is set to be larger than the rated current, so that the starting instruction can be quickly responded, the acceleration is improved, and the starting time is shortened; when the intermediate starting rotating speed is reached, the second endurance starting mode with the working current equal to the rated current is switched into, at the moment, the motor of the electric vehicle can be quickly increased to the target rated rotating speed under the starting acceleration of the first endurance starting mode, the consumed current of the battery unit mileage is effectively reduced, and simultaneously, after the motor is kept at the target rated rotating speed, because the motor of the electric vehicle finishes the starting work and enters a stable running state, because the set rated current is usually higher than the optimal working current required during the steady-state running for realizing the good quick starting, the embodiment can be further switched into the endurance running mode with the working current smaller than the rated current after the starting work is finished, so that the motor of the electric vehicle can be ensured to enter the steady-state electricity-saving running state, the rotating speed of the motor can be slightly lower than the rated rotating speed, but a user can not have obvious feeling during the stable running, in the most preferable energy-saving endurance mode; the technical scheme of the embodiment can obviously improve the endurance mileage of the electric vehicle, has simple control process, does not need to consume independent device cost, can be directly applied to the existing motor driving system, has universality, can not cause the technical effect of improving the endurance mileage to become uncertain due to the replacement of a driving user, and is particularly suitable for being applied to electric two-wheel vehicle products.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A method for improving the endurance mileage of an electric vehicle is characterized in that the electric vehicle is provided with a motor driving system comprising a motor and a controller, and the motor driving system realizes power supply input through a storage battery of the electric vehicle; the controller inputs a starting instruction through an electric vehicle handle, and drives the motor to accelerate starting according to the starting instruction, the motor is correspondingly provided with a rated current and a rated rotating speed under the starting instruction, the rated rotating speed refers to the maximum rotating speed of the motor under the rated current, and the electric vehicle is characterized by being provided with an energy-saving cruising mode and a conventional driving mode, wherein the energy-saving cruising mode comprises the following steps: when the controller receives a starting instruction input by a rotating handle of the electric vehicle, the motor is driven to accelerate from an initial rotating speed to a rated rotating speed; wherein the content of the first and second substances,
setting an intermediate starting rotating speed between the initial rotating speed and the rated rotating speed, wherein the intermediate starting rotating speed is greater than the initial rotating speed and less than the rated rotating speed; defining the process of accelerating the motor from the initial rotating speed to the middle starting rotating speed as a first endurance starting mode of the electric vehicle, defining the process of accelerating the motor from the middle starting rotating speed to the rated rotating speed as a second endurance starting mode of the electric vehicle, and defining the process of operating the motor at the rated rotating speed as an endurance operating mode of the electric vehicle; the control step of the energy-saving endurance mode comprises the following steps:
s10), when the electric vehicle is in a first endurance starting mode, the controller sets the working current of the motor to be larger than the rated current;
s20), when the electric vehicle is in a second endurance starting mode, the controller sets the working current of the motor to be equal to the rated current;
s30), when the electric vehicle is in a continuous-driving running mode, the controller sets the working current of the motor to be less than the rated current.
2. The method for improving the driving range of the electric vehicle according to claim 1, wherein the electric vehicle is operated in a normal driving mode when the output voltage of the electric vehicle battery is equal to or less than 95% of the rated voltage of the electric vehicle battery; and when the output voltage of the electric vehicle storage battery is greater than 95% of the rated voltage of the electric vehicle storage battery, the electric vehicle runs in an energy-saving endurance mode.
3. The method for improving the driving range of the electric vehicle according to claim 2, wherein the output voltage of the electric vehicle battery ranges from 48V to 72V; the rated current range is 8-40A; the rated rotating speed range is 300-1000 rpm.
4. The method for improving the driving range of an electric vehicle according to claim 1 or 2, wherein the initial rotation speed is zero speed or non-zero speed, and the difference between the intermediate starting rotation speed and the initial rotation speed is in the range of 80-200 rpm.
5. The method for improving the endurance mileage of an electric vehicle according to claim 1 or 2, wherein the controller sets the operating current of the motor to 1.1 to 1.3 times the rated current when the electric vehicle is in the first endurance starting mode.
6. The method as claimed in claim 5, wherein the initial rotation speed is zero speed, and the rated rotation speed range is 700-1000 rpm; setting a first-stage intermediate starting rotating speed and a second-stage intermediate starting rotating speed between the initial rotating speed and the rated rotating speed, wherein the range of the first-stage intermediate starting rotating speed is 80-150 revolutions per minute, and the range of the second-stage intermediate starting rotating speed is 300-400 revolutions per minute; the method comprises the following steps that a process of accelerating a motor from an initial rotating speed to a first-stage intermediate starting rotating speed is defined as a first primary cruising starting mode of the electric vehicle, and a process of accelerating the motor from the first-stage intermediate starting rotating speed to a second-stage intermediate starting rotating speed is defined as a first final-stage cruising starting mode of the electric vehicle;
the step S10) is: when the electric vehicle is in a first primary endurance starting mode, the controller sets the working current of the motor to be 1.2-1.3 times of the rated current; when the electric vehicle is in the first final-stage cruising starting mode, the controller sets the working current of the motor to be 1.1-1.19 times of the rated current.
7. The method for improving the endurance mileage of an electric vehicle according to claim 1 or 2, wherein the controller sets the operating current of the motor to 0.8 to 0.9 times the rated current when the electric vehicle is in the endurance operation mode.
8. The method for improving the driving range of the electric vehicle as claimed in claim 6, wherein the motor is a permanent magnet synchronous hub motor, and the output power range of the permanent magnet synchronous hub motor is 400-1500W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539116.8A CN111645538B (en) | 2020-06-14 | 2020-06-14 | Method for improving endurance mileage of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539116.8A CN111645538B (en) | 2020-06-14 | 2020-06-14 | Method for improving endurance mileage of electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111645538A CN111645538A (en) | 2020-09-11 |
| CN111645538B true CN111645538B (en) | 2022-07-15 |
Family
ID=72352884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010539116.8A Active CN111645538B (en) | 2020-06-14 | 2020-06-14 | Method for improving endurance mileage of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111645538B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2943589A3 (en) * | 2009-03-31 | 2010-10-01 | Renault Sas | Electric motor 's torque adjusting method for electric vehicle, involves applying current corresponding to setpoint to motor for generating corresponding motor torque to confer speed defined by position of accelerator pedal to vehicle |
| CN201656885U (en) * | 2010-04-02 | 2010-11-24 | 浙江绿佳车业有限公司 | Speed control device for battery truck |
| CN101941386B (en) * | 2010-09-08 | 2012-09-26 | 深圳市高标电子科技有限公司 | Electric bicycle, control device and method thereof |
| CN202806425U (en) * | 2012-07-18 | 2013-03-20 | 程燕 | Soft start controller for high-power electric vehicles |
| CN103963664B (en) * | 2014-05-20 | 2016-08-31 | 天津雅迪实业有限公司 | A kind of electric motor car starting speed regulating method and device |
| CN104129319B (en) * | 2014-07-09 | 2016-07-06 | 浙江绿源电动车有限公司 | The control method of the motor speed of electric motor car and device |
| CN107395073B (en) * | 2017-09-01 | 2021-05-04 | 广东美的暖通设备有限公司 | Motor operation control method and system, computer, readable storage medium and air conditioner |
| CN109747765B (en) * | 2018-12-12 | 2022-05-20 | 天津爱玛车业科技有限公司 | Intelligent power control method and device for electric vehicle |
-
2020
- 2020-06-14 CN CN202010539116.8A patent/CN111645538B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111645538A (en) | 2020-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107065550B (en) | Range-extending electric vehicle efficiency optimization control method based on threshold power calculation | |
| CN107757419B (en) | Motor efficiency control method and device of electric automobile and vehicle | |
| CA2412680A1 (en) | Hybrid vehicle and control method therefor | |
| CN105438169A (en) | Control method and device for range-extending type vehicle engine | |
| WO2009089718A1 (en) | A protection method for limited charging/discharging current of hybrid electric vehicle battery and a device and a system thereof | |
| CN110920602B (en) | Hybrid vehicle start-stop control method and device based on battery SOC and terminal | |
| CN103158711A (en) | Torque control method for hybrid vehicle and system thereof | |
| CN113103925B (en) | Whole vehicle energy control method for following type hydrogen fuel cell passenger vehicle | |
| CN109177968B (en) | Drive mode control method of power split type hybrid electric vehicle | |
| CN110194064A (en) | Bi-motor integration pure electric vehicle passenger car power allocation strategy optimization method | |
| CN102611369A (en) | Speed-regulating system for switched reluctance motor specially used for electric vehicle | |
| CN111645538B (en) | Method for improving endurance mileage of electric vehicle | |
| JPH0847107A (en) | Generating controlling method for series hybrid vehicle | |
| CN105599752A (en) | Single-axis double-clutch series-parallel hybrid power model and drive method thereof | |
| CN110329237B (en) | Vehicle start control method and device, storage medium and vehicle | |
| CN107097774A (en) | The energy distributing method of parallel type hybrid vehicle | |
| CN110481341A (en) | A kind of electric car dual-motor drive system and its control method | |
| CN109532561A (en) | Dynamical system load shedding control method under four-wheel low-speed electronic vehicle low battery state | |
| CN111703443B (en) | Hybrid locomotive and energy balance control method and system thereof | |
| CN110380651B (en) | Motor design method and device for new energy vehicles | |
| CN110979027B (en) | Control method for economic mode of pure electric bus | |
| CN112092639A (en) | Torque distribution control method and system for double-motor vehicle | |
| CN202550951U (en) | Special SRM (switched reluctance motor) speed-regulating system for electric automobile | |
| JP3972762B2 (en) | Vehicle power generation control device | |
| CN111959293A (en) | Motor torque limit value calculation method of double-motor planet row hybrid drive system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |