CN111959285A - Electric vehicle energy recovery method, equipment, storage medium and device - Google Patents
Electric vehicle energy recovery method, equipment, storage medium and device Download PDFInfo
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- CN111959285A CN111959285A CN202010798645.XA CN202010798645A CN111959285A CN 111959285 A CN111959285 A CN 111959285A CN 202010798645 A CN202010798645 A CN 202010798645A CN 111959285 A CN111959285 A CN 111959285A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2250/00—Driver interactions
- B60L2250/26—Driver interactions by pedal actuation
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Abstract
The invention discloses an electric automobile energy recovery method, equipment, a storage medium and a device, wherein the method comprises the following steps: obtaining pedal opening information and initial vehicle speed information of a target vehicle, determining a target energy recovery torque value of a motor of the target vehicle according to the pedal opening information and the initial vehicle speed information, and performing energy recovery on the target vehicle according to the target energy recovery torque value; compared with the existing mode of recovering energy through a fixed torque value, the method and the device have the advantages that the target energy recovery torque value of the motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and the energy of the target vehicle is recovered according to the target energy recovery torque value, so that the energy recovery torque value can be adjusted according to the actual situation, the defect that the energy recovery torque value cannot be adjusted in the prior art is overcome, and therefore the energy recovery process of the electric vehicle can be optimized to meet the requirements of customers.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an electric automobile energy recovery method, electric automobile energy recovery equipment, a storage medium and a device.
Background
At present, electric vehicles have many acceleration and deceleration processes during driving, wherein the deceleration process has a large amount of kinetic energy converted into heat to be released into the environment. In the prior art, an energy recovery system is utilized to effectively convert vehicle kinetic energy into electric energy to recover more energy in the deceleration process, so that the electric energy consumption can be effectively reduced.
However, the conventional energy recovery intensity is a fixed value and cannot be adjusted according to actual conditions, so that the electric energy recovery efficiency is low.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an electric automobile energy recovery method, equipment, a storage medium and a device, and aims to solve the technical problem of how to optimize the energy recovery process of an electric automobile.
In order to achieve the above object, the present invention provides an electric vehicle energy recovery method, including the following steps:
obtaining pedal opening information and initial vehicle speed information of a target vehicle;
determining a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information;
and performing energy recovery on the target vehicle according to the target energy recovery torque value.
Preferably, the step of determining a target energy recovery torque value of a target vehicle motor according to the pedal opening degree information and the initial vehicle speed information specifically includes:
judging whether the target vehicle is in a preset vehicle state or not according to the pedal opening information and the initial vehicle speed information;
when the target vehicle is in the preset vehicle state, acquiring an initial motor rotating speed;
and determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
Preferably, the step of determining the target energy recovery torque value of the target vehicle motor according to the initial motor speed specifically includes:
judging whether the initial motor rotating speed is equal to a preset rotating speed threshold value or not;
when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information;
and searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor.
Preferably, after the step of determining whether the initial motor speed is equal to a preset speed threshold, the method for recovering energy of an electric vehicle further includes:
when the initial motor rotating speed is not equal to the preset rotating speed threshold value, judging whether the initial motor rotating speed is greater than a preset judgment threshold value;
and when the initial motor rotating speed is greater than the preset judgment threshold value, acquiring the current braking deceleration, and determining a target energy recovery torque value according to the current braking deceleration.
Preferably, before the step of determining the target energy recovery torque value of the target vehicle motor according to the initial motor speed, the electric vehicle energy recovery method further includes:
acquiring an initial driving torque value, and adjusting the initial driving torque value according to a preset adjustment strategy to acquire a current driving torque value;
judging whether to enter an energy recovery mode according to the current driving torque value;
correspondingly, the step of determining the target energy recovery torque value of the target vehicle motor according to the initial motor speed specifically comprises:
and when the energy recovery mode is entered, determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
Preferably, after the step of determining the target energy recovery torque value of the target vehicle motor according to the initial motor speed when entering the energy recovery mode, the electric vehicle energy recovery method further includes:
acquiring a current vehicle speed, and judging whether the current vehicle speed is greater than a preset vehicle speed threshold value;
and when the current vehicle speed is less than or equal to the preset vehicle speed threshold value, exiting the energy recovery mode.
Preferably, after the step of recovering energy of the target vehicle according to the target energy recovery torque value, the method for recovering energy of an electric vehicle further includes:
and when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value.
In addition, in order to achieve the above object, the present invention further provides an electric vehicle energy recovery apparatus, which includes a memory, a processor, and an electric vehicle energy recovery program stored in the memory and operable on the processor, wherein the electric vehicle energy recovery program is configured to implement the steps of the electric vehicle energy recovery method as described above.
In addition, to achieve the above object, the present invention further provides a storage medium, which stores thereon an electric vehicle energy recovery program, and when the electric vehicle energy recovery program is executed by a processor, the electric vehicle energy recovery program implements the steps of the electric vehicle energy recovery method as described above.
In addition, in order to achieve the above object, the present invention further provides an electric vehicle energy recovery apparatus, including: the device comprises an acquisition module, a determination module and a control module;
the acquisition module is used for acquiring pedal opening information and initial vehicle speed information of a target vehicle;
the determining module is used for determining a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information;
and the control module is used for carrying out energy recovery on the target vehicle according to the target energy recovery torque value.
According to the invention, pedal opening information and initial vehicle speed information of a target vehicle are obtained, a target energy recovery torque value of a motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and energy recovery is carried out on the target vehicle according to the target energy recovery torque value; compared with the existing mode of recovering energy through a fixed torque value, the method and the device have the advantages that the target energy recovery torque value of the motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and the energy of the target vehicle is recovered according to the target energy recovery torque value, so that the energy recovery torque value can be adjusted according to the actual situation, the defect that the energy recovery torque value cannot be adjusted in the prior art is overcome, and therefore the energy recovery process of the electric vehicle can be optimized to meet the requirements of customers.
Drawings
FIG. 1 is a schematic structural diagram of an electric vehicle energy recovery apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of an energy recovery method for an electric vehicle according to the present invention;
FIG. 3 is a schematic flow chart illustrating a second embodiment of the energy recovery method for an electric vehicle according to the present invention;
FIG. 4 is a schematic flow chart illustrating a third embodiment of an energy recovery method for an electric vehicle according to the present invention;
fig. 5 is a block diagram of an energy recovery device for an electric vehicle according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electric vehicle energy recovery apparatus in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the energy recovery apparatus for an electric vehicle may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), and the optional user interface 1003 may further include a standard wired interface and a wireless interface, and the wired interface for the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the electric vehicle energy recovery apparatus and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in FIG. 1, a memory 1005, identified as one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and an electric vehicle energy recovery program.
In the energy recovery device of the electric vehicle shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the electric vehicle energy recovery device calls an electric vehicle energy recovery program stored in the memory 1005 through the processor 1001 and executes the electric vehicle energy recovery method provided by the embodiment of the invention.
Based on the hardware structure, the embodiment of the energy recovery method of the electric vehicle is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the energy recovery method for an electric vehicle according to the present invention, and the first embodiment of the energy recovery method for an electric vehicle according to the present invention is provided.
In a first embodiment, the electric vehicle energy recovery method comprises the following steps:
step S10: pedal opening information and initial vehicle speed information of a target vehicle are acquired.
It should be understood that the execution subject of the embodiment is the electric Vehicle energy recovery device, where the electric Vehicle energy recovery device may be an electronic device such as a Vehicle Control Unit (VCU), and may also be another device that can achieve the same or similar functions.
It should be noted that the target vehicle may be an electric vehicle mounted with an electric vehicle energy recovery apparatus; the pedal opening degree information may be brake pedal opening degree information and accelerator pedal opening degree information, the brake pedal opening degree information may be determined by opening degree change information of a displacement sensor mounted on a brake pedal and acceleration information, and the accelerator pedal opening degree information may be determined by opening degree change information of a displacement sensor mounted on an accelerator pedal and acceleration information; the initial vehicle speed information may be an initial vehicle speed of the target vehicle.
It is understood that obtaining the pedal opening degree information of the target vehicle may be that the electric vehicle energy recovery apparatus collects opening degree change information and acceleration information of a displacement sensor mounted on an accelerator pedal and a displacement sensor mounted on a brake pedal, and determines the pedal opening degree information according to the opening degree change information and the acceleration information.
Step S20: and determining a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information.
It should be noted that the target energy recovery torque value may be a torque magnitude for converting kinetic energy into electric energy during the energy recovery process.
It is understood that the determining of the target energy recovery torque value of the target vehicle motor according to the pedal opening degree information and the initial vehicle speed information may be generating driver intention information according to the pedal opening degree information and the initial vehicle speed information, and looking up the target energy recovery torque value corresponding to the driver intention information in a preset first mapping table.
The driver intention information may be information on the operation of the target vehicle by the driver. For example, when the driver steps on the brake pedal, the driver intention information is brake deceleration; the preset first map table may include a first correspondence relationship between the driver intention information and the target energy recovery torque value, and the first correspondence relationship may be set according to an actual demand of the user.
It should be understood that, the determining of the target energy recovery torque value of the target vehicle motor according to the pedal opening degree information and the initial vehicle speed information may also be determining whether the target vehicle is in a preset vehicle state according to the pedal opening degree information and the initial vehicle speed information, acquiring an initial motor rotating speed when the target vehicle is in the preset vehicle state, and determining the target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed;
and when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value.
Step S30: and performing energy recovery on the target vehicle according to the target energy recovery torque value.
It should be noted that the energy recovery of the electric vehicle may be a braking energy recovery, that is, the electric vehicle is controlled by an energy recovery torque value to perform braking, then obtains excess energy released during braking or coasting, converts the excess energy into electric energy by a generator, and finally stores the electric energy in a storage battery for later acceleration driving.
It should be understood that the energy recovery of the target vehicle according to the target energy recovery torque value may be to control a target vehicle motor of the target vehicle to brake according to the target energy recovery torque value, so that the excess energy released in braking or coasting is converted into electric energy by a generator and then stored in a storage battery to realize energy recovery.
In the first embodiment, pedal opening information and initial vehicle speed information of a target vehicle are acquired, a target energy recovery torque value of a motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and energy recovery is carried out on the target vehicle according to the target energy recovery torque value; compared with the existing mode of recovering energy through a fixed torque value, the target energy recovery torque value of the motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and energy recovery is performed on the target vehicle according to the target energy recovery torque value, so that the energy recovery torque value can be adjusted according to actual conditions, the defect that the energy recovery torque value cannot be adjusted in the prior art is overcome, and therefore the energy recovery process of the electric vehicle can be optimized to meet customer requirements.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the energy recovery method for an electric vehicle according to the present invention, and the second embodiment of the energy recovery method for an electric vehicle according to the present invention is proposed based on the first embodiment shown in fig. 2.
In the second embodiment, the step S20 includes:
step S201: and judging whether the target vehicle is in a preset vehicle state or not according to the pedal opening information and the initial vehicle speed information.
The preset vehicle state may be a coasting deceleration state, wherein the coasting deceleration state may be a running state in which the brake pedal is not depressed and deceleration is performed only by friction.
It should be understood that, the step opening information and the initial vehicle speed information are used to judge whether the target vehicle is in the sliding deceleration state, that is, in the preset vehicle state, whether the current gear of the target vehicle is in the preset gear is judged first, then whether the accelerator opening is smaller than the preset first threshold and the brake opening is equal to the preset second threshold is judged according to the step opening information, and finally whether the initial vehicle speed is greater than the preset vehicle speed is judged according to the initial vehicle speed information.
It should be noted that the preset gear may be a D gear; the preset first threshold may be a 15% opening calibration value, which is set according to a user requirement, and this embodiment is not limited to this; the preset second threshold may be 0; the preset vehicle speed may be an energy recovery allowable calibration value, which is exemplified by 10km/h in the present embodiment.
In a specific implementation, for example, when the target vehicle is in a D gear, the opening degree of an accelerator pedal is less than 15% of a calibration value, a brake pedal is not stepped, and the vehicle speed is greater than an energy recovery allowable calibration value by 10km/h, the VCU recognizes that the driver has an intention to coast and decelerate, and determines that the target vehicle is in a coasting and decelerating state.
Further, after the step S201, the method further includes:
and when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value.
It should be noted that the preset torque value may be an energy recovery rated torque value, that is, a maximum torque value allowed to be reached under an energy recovery condition, and the energy recovery rated torque value may be implemented according to a user requirement, which is not limited in this embodiment.
It should be understood that when the target vehicle is not in the preset vehicle state, that is, the target vehicle is not in the coasting deceleration state, the preset torque value may be directly used as the target energy recovery torque value;
whether the target vehicle is in a braking and decelerating state or not may be judged according to the pedal opening degree information and the initial vehicle speed information, and when the target vehicle is in the braking and decelerating state, the preset torque value may be used as the target energy recovery torque value.
Step S202: and when the target vehicle is in the preset vehicle state, acquiring the initial motor rotating speed.
It should be noted that the initial motor speed may be a speed of the motor at the present moment, and this embodiment is not limited to this.
It should be appreciated that obtaining the initial motor speed may be a direct acquisition of the VCU by reading vehicle data on a Controller Area Network (CAN) bus.
Step S203: and determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
It should be appreciated that determining a target energy recovery torque value for a target vehicle motor based on the initial motor speed may be determining whether the initial motor speed is equal to a preset speed threshold; when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information; searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor;
or judging whether the initial motor rotating speed is equal to a preset rotating speed threshold value or not, and judging whether the initial motor rotating speed is greater than a preset judgment threshold value or not when the initial motor rotating speed is not equal to the preset rotating speed threshold value; and when the initial motor rotating speed is greater than the preset judgment threshold value, acquiring the current braking deceleration, and determining a target energy recovery torque value according to the current braking deceleration.
Further, the step S203 includes:
judging whether the initial motor rotating speed is equal to a preset rotating speed threshold value or not;
when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information;
and searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor.
It should be noted that the preset rotation speed threshold may be set according to actual requirements, and in this embodiment, 0rph is exemplified.
It should be noted that the initial pedal opening may be an opening of an accelerator pedal at the current time, and in this embodiment, when the opening of the accelerator pedal is 0%, it represents that the user does not step on the accelerator pedal at this time; the larger the accelerator opening degree is, the more the user wants to accelerate.
It should be appreciated that determining the initial pedal opening based on the pedal opening information may be extracting the initial pedal opening directly from the pedal opening information.
It can be understood that, the searching for the energy recovery torque value corresponding to the initial pedal opening may be to search for the energy recovery torque value corresponding to the initial pedal opening in a preset opening mapping relation table, where the preset second mapping relation table includes a second corresponding relation between the pedal opening and the energy recovery intensity, and the second corresponding relation may be set according to an actual requirement of a user, which is not limited in this embodiment.
Further, after determining whether the initial motor rotation speed is equal to a preset rotation speed threshold, the method further includes:
when the initial motor rotating speed is not equal to the preset rotating speed threshold value, judging whether the initial motor rotating speed is greater than a preset judgment threshold value;
and when the initial motor rotating speed is greater than the preset judgment threshold value, acquiring the current braking deceleration, and determining a target energy recovery torque value according to the current braking deceleration.
It should be noted that the preset determination threshold may be set according to a user requirement, and in this embodiment, 400rph is taken as an example for description; the current braking deceleration may be the ability of the vehicle to rapidly reduce the travel speed while traveling until stopped.
It should be understood that obtaining the current brake deceleration may be a direct acquisition by the VCU reading the CAN bus data; determining the target energy recovery torque value based on the current braking deceleration may be determining a calibrated torque value based on the current braking deceleration and linearly increasing the target energy recovery torque value from 0 to the calibrated torque value.
In a specific implementation, for example, the VCU determines the target energy recovery torque value based on the accelerator opening (0-15%) and the motor speed by: firstly, when the rotating speed of the motor is 0-400rph (a calibrated value), the target energy recovery torque value is 0; when the rotating speed of the motor is 400-800 rph, the target energy recovery torque value is linearly increased from 0 to a calibration torque value obtained according to the current braking deceleration; and thirdly, when the rotating speed of the motor is 0 and the opening of the accelerator pedal is 0%, the target energy recovery torque value is a calibration maximum value, and the target energy recovery torque value is reduced to 0 along with the increase of the opening to 15%.
In a second embodiment, whether the target vehicle is in a preset vehicle state is judged according to the pedal opening degree information and the initial vehicle speed information, when the target vehicle is in the preset vehicle state, an initial motor rotating speed is obtained, and a target energy recovery torque value of a motor of the target vehicle is determined according to the initial motor rotating speed; when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value; according to the method and the device, the current state of the vehicle is identified, and the determination mode of the target energy recovery torque value is determined according to the current state of the vehicle, so that different torque value determination modes can be adopted according to different states of the vehicle, and the stability is improved;
in a second embodiment, it is determined whether the initial motor speed is equal to a preset speed threshold; when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information; searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor; in this embodiment, when the initial motor rotation speed is equal to the preset rotation speed threshold, the target energy recovery torque value is determined according to the pedal opening information, so that the energy recovery intensity can be adjusted by only controlling the pedal opening during energy recovery, and the energy recovery process is more in line with the user requirements.
Referring to fig. 4, fig. 4 is a schematic flow chart of a third embodiment of the energy recovery method for an electric vehicle according to the present invention, and the third embodiment of the energy recovery method for an electric vehicle according to the present invention is proposed based on the second embodiment shown in fig. 3.
In the third embodiment, before the step S203, the method further includes:
step S212: and acquiring an initial driving torque value, and adjusting the initial driving torque value according to a preset adjustment strategy to acquire a current driving torque value.
It should be noted that the initial driving torque value may be a torque magnitude of the driving motor; the preset adjustment strategy can be to unload the driving torque according to a preset gradient value, wherein the preset gradient value can be set according to the requirement of a user; the current drive torque value may be an adjusted drive torque value.
It should be understood that obtaining the initial drive torque value may be the VCU obtaining directly by reading CAN bus data; the adjusting of the initial driving torque value according to the preset adjusting strategy may be unloading the driving torque according to a preset gradient to obtain an unloaded driving torque value, and taking the unloaded driving torque value as the current driving torque value.
Step S222: and judging whether to enter an energy recovery mode according to the current driving torque value.
The energy recovery mode may be a working mode in which an energy recovery torque value is determined, the motor is controlled to brake through the energy recovery torque value, excess energy released during braking or freewheeling is obtained, the excess energy is converted into electric energy through the generator, and the electric energy is stored in the storage battery.
It should be understood that the determining whether to enter the energy recovery mode according to the current driving torque value may be determining whether the current driving torque value is equal to a preset torque value, and entering the energy recovery mode when the current driving torque value is equal to the preset torque value; and returning to the step of obtaining the initial driving torque value when the current driving torque value is not equal to the preset torque value, and adjusting the initial driving torque value according to a preset adjustment strategy to obtain the current driving torque value until the current driving torque value is equal to the preset torque value.
Accordingly, the step S203 includes:
step S203': and when the energy recovery mode is entered, determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
In the third embodiment, after the step S30, the method further includes:
step S40: the method comprises the steps of obtaining a current vehicle speed and judging whether the current vehicle speed is greater than a preset vehicle speed threshold value.
It should be noted that the current vehicle speed may be the vehicle speed at the current time; the preset vehicle speed threshold can be set according to the actual requirements of users, and 10km/h is taken as an example in the implementation.
Step S50: and when the current vehicle speed is less than or equal to the preset vehicle speed threshold value, exiting the energy recovery mode.
It should be understood that when the current vehicle speed is less than or equal to the preset vehicle speed threshold, it indicates that the vehicle speed is too low, the energy recovery efficiency is low, and the energy recovery mode needs to be exited.
In a third embodiment, an initial driving torque value is obtained, the initial driving torque value is adjusted according to a preset adjustment strategy to obtain a current driving torque value, whether an energy recovery mode is entered or not is judged according to the current driving torque value, when the energy recovery mode is entered, a target energy recovery torque value of a target vehicle motor is determined according to the rotating speed of the initial motor, energy recovery is performed on the target vehicle according to the target energy recovery torque value to obtain a current vehicle speed, whether the current vehicle speed is greater than a preset vehicle speed threshold value is judged, and when the current vehicle speed is less than or equal to the preset vehicle speed threshold value, the energy recovery mode is exited; in this embodiment, the energy recovery mode is exited when the current vehicle speed is less than or equal to the preset vehicle speed threshold, so that the vehicle can be prevented from being in the energy recovery mode for a long time, and user experience is improved.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores an electric vehicle energy recovery program, and the electric vehicle energy recovery program, when executed by a processor, implements the steps of the electric vehicle energy recovery method described above.
In addition, referring to fig. 5, an embodiment of the present invention further provides an electric vehicle energy recovery apparatus, where the electric vehicle energy recovery apparatus includes: the system comprises an acquisition module 10, a determination module 20 and a recovery module 30;
the obtaining module 10 is configured to obtain pedal opening information and initial vehicle speed information of a target vehicle.
It should be noted that the target vehicle may be an electric vehicle mounted with an electric vehicle energy recovery apparatus; the pedal opening degree information may be brake pedal opening degree information and accelerator pedal opening degree information, the brake pedal opening degree information may be determined by opening degree change information of a displacement sensor mounted on a brake pedal and acceleration information, and the accelerator pedal opening degree information may be determined by opening degree change information of a displacement sensor mounted on an accelerator pedal and acceleration information; the initial vehicle speed information may be an initial vehicle speed of the target vehicle.
It is understood that obtaining the pedal opening degree information of the target vehicle may be that the electric vehicle energy recovery apparatus collects opening degree change information and acceleration information of a displacement sensor mounted on an accelerator pedal and a displacement sensor mounted on a brake pedal, and determines the pedal opening degree information according to the opening degree change information and the acceleration information.
The determining module 20 is configured to determine a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information.
It should be noted that the target energy recovery torque value may be a torque magnitude for converting kinetic energy into electric energy during the energy recovery process.
It is understood that the determining of the target energy recovery torque value of the target vehicle motor according to the pedal opening degree information and the initial vehicle speed information may be generating driver intention information according to the pedal opening degree information and the initial vehicle speed information, and looking up the target energy recovery torque value corresponding to the driver intention information in a preset first mapping table.
The driver intention information may be information on the operation of the target vehicle by the driver. For example, when the driver steps on the brake pedal, the driver intention information is brake deceleration; the preset first map table may include a first correspondence relationship between the driver intention information and the target energy recovery torque value, and the first correspondence relationship may be set according to an actual demand of the user.
It should be understood that, the determining of the target energy recovery torque value of the target vehicle motor according to the pedal opening degree information and the initial vehicle speed information may also be determining whether the target vehicle is in a preset vehicle state according to the pedal opening degree information and the initial vehicle speed information, acquiring an initial motor rotating speed when the target vehicle is in the preset vehicle state, and determining the target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed;
and when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value.
The recovery module 30 is configured to recover energy of the target vehicle according to the target energy recovery torque value.
It should be noted that the energy recovery of the electric vehicle may be a braking energy recovery, that is, the electric vehicle is controlled by an energy recovery torque value to perform braking, then obtains excess energy released during braking or coasting, converts the excess energy into electric energy by a generator, and finally stores the electric energy in a storage battery for later acceleration driving.
It should be understood that the energy recovery of the target vehicle according to the target energy recovery torque value may be to control a target vehicle motor of the target vehicle to brake according to the target energy recovery torque value, so that the excess energy released in braking or coasting is converted into electric energy by a generator and then stored in a storage battery to realize energy recovery.
In the embodiment, pedal opening information and initial vehicle speed information of a target vehicle are acquired, a target energy recovery torque value of a motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and energy recovery is performed on the target vehicle according to the target energy recovery torque value; compared with the existing mode of recovering energy through a fixed torque value, the target energy recovery torque value of the motor of the target vehicle is determined according to the pedal opening information and the initial vehicle speed information, and energy recovery is performed on the target vehicle according to the target energy recovery torque value, so that the energy recovery torque value can be adjusted according to actual conditions, the defect that the energy recovery torque value cannot be adjusted in the prior art is overcome, and therefore the energy recovery process of the electric vehicle can be optimized to meet customer requirements.
In an embodiment, the determining module 20 is further configured to determine whether the target vehicle is in a preset vehicle state according to the pedal opening information and the initial vehicle speed information; when the target vehicle is in the preset vehicle state, acquiring an initial motor rotating speed; determining a target energy recovery torque value of a target vehicle motor according to the initial motor rotating speed;
in an embodiment, the determining module 20 is further configured to determine whether the initial motor speed is equal to a preset speed threshold; when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information; searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor;
in an embodiment, the determining module 20 is further configured to determine whether the initial motor speed is greater than a preset determination threshold when the initial motor speed is not equal to the preset speed threshold; when the initial motor rotating speed is larger than the preset judgment threshold value, obtaining the current braking deceleration, and determining a target energy recovery torque value according to the current braking deceleration;
in an embodiment, the determining module 20 is further configured to obtain an initial driving torque value, and adjust the initial driving torque value according to a preset adjustment strategy to obtain a current driving torque value; judging whether to enter an energy recovery mode according to the current driving torque value; determining a target energy recovery torque value of a target vehicle motor according to the initial motor speed when entering the energy recovery mode;
in an embodiment, the energy recovery device of an electric vehicle further includes: exiting the module;
the exit module is used for acquiring the current vehicle speed and judging whether the current vehicle speed is greater than a preset vehicle speed threshold value; when the current vehicle speed is less than or equal to the preset vehicle speed threshold value, the energy recovery mode is exited;
in an embodiment, the determining module 20 is further configured to use a preset torque value as the target energy recovery torque value when the target vehicle is not in the preset vehicle state.
Other embodiments or specific implementation manners of the energy recovery device of the electric vehicle according to the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, an optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The electric vehicle energy recovery method is characterized by comprising the following steps:
obtaining pedal opening information and initial vehicle speed information of a target vehicle;
determining a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information;
and performing energy recovery on the target vehicle according to the target energy recovery torque value.
2. The energy recovery method of an electric vehicle according to claim 1, wherein the step of determining the target energy recovery torque value of the target vehicle motor based on the pedal opening degree information and the initial vehicle speed information specifically comprises:
judging whether the target vehicle is in a preset vehicle state or not according to the pedal opening information and the initial vehicle speed information;
when the target vehicle is in the preset vehicle state, acquiring an initial motor rotating speed;
and determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
3. The energy recovery method of an electric vehicle according to claim 2, wherein the step of determining the target energy recovery torque value of the target vehicle motor based on the initial motor speed specifically comprises:
judging whether the initial motor rotating speed is equal to a preset rotating speed threshold value or not;
when the initial motor rotating speed is equal to the preset rotating speed threshold value, determining initial pedal opening according to the pedal opening information;
and searching an energy recovery torque value corresponding to the initial pedal opening, and taking the energy recovery torque value as a target energy recovery torque value of a target vehicle motor.
4. The energy recovery method of an electric vehicle according to claim 3, wherein after the step of determining whether the initial motor speed is equal to a preset speed threshold, the energy recovery method further comprises:
when the initial motor rotating speed is not equal to the preset rotating speed threshold value, judging whether the initial motor rotating speed is greater than a preset judgment threshold value;
and when the initial motor rotating speed is greater than the preset judgment threshold value, acquiring the current braking deceleration, and determining a target energy recovery torque value according to the current braking deceleration.
5. The electric vehicle energy recovery method of claim 2, wherein prior to the step of determining a target energy recovery torque value for a target vehicle motor based on the initial motor speed, the electric vehicle energy recovery method further comprises:
acquiring an initial driving torque value, and adjusting the initial driving torque value according to a preset adjustment strategy to acquire a current driving torque value;
judging whether to enter an energy recovery mode according to the current driving torque value;
correspondingly, the step of determining the target energy recovery torque value of the target vehicle motor according to the initial motor speed specifically comprises:
and when the energy recovery mode is entered, determining a target energy recovery torque value of the target vehicle motor according to the initial motor rotating speed.
6. The electric vehicle energy recovery method according to claim 5, wherein after the step of recovering energy of the target vehicle according to the target energy recovery torque value, the electric vehicle energy recovery method further comprises:
acquiring a current vehicle speed, and judging whether the current vehicle speed is greater than a preset vehicle speed threshold value;
and when the current vehicle speed is less than or equal to the preset vehicle speed threshold value, exiting the energy recovery mode.
7. The electric vehicle energy recovery method according to claim 2, wherein after the step of determining whether the target vehicle is in a preset vehicle state based on the pedal opening degree information and the initial vehicle speed information, the electric vehicle energy recovery method further comprises:
and when the target vehicle is not in the preset vehicle state, taking a preset torque value as a target energy recovery torque value.
8. An electric vehicle energy recovery apparatus, characterized in that the electric vehicle energy recovery apparatus comprises: a memory, a processor and an electric vehicle energy recovery program stored on the memory and executable on the processor, the electric vehicle energy recovery program when executed by the processor implementing the steps of the electric vehicle energy recovery method according to any one of claims 1 to 7.
9. A storage medium, characterized in that the storage medium stores thereon an electric vehicle energy recovery program, which when executed by a processor implements the steps of the electric vehicle energy recovery method according to any one of claims 1 to 7.
10. An electric vehicle energy recovery device, characterized in that, electric vehicle energy recovery device includes: the device comprises an acquisition module, a determination module and a recovery module;
the acquisition module is used for acquiring pedal opening information and initial vehicle speed information of a target vehicle;
the determining module is used for determining a target energy recovery torque value of a target vehicle motor according to the pedal opening information and the initial vehicle speed information;
the recovery module is used for recovering the energy of the target vehicle according to the target energy recovery torque value.
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| CN112659916A (en) * | 2020-12-24 | 2021-04-16 | 潍柴动力股份有限公司 | Electric automobile parking method and device |
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