CN107284249B - Energy recovery method and system for electric automobile - Google Patents
Energy recovery method and system for electric automobile Download PDFInfo
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- CN107284249B CN107284249B CN201710392419.XA CN201710392419A CN107284249B CN 107284249 B CN107284249 B CN 107284249B CN 201710392419 A CN201710392419 A CN 201710392419A CN 107284249 B CN107284249 B CN 107284249B
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/20—Braking by supplying regenerated power to the prime mover of vehicles comprising engine-driven generators
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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
- B60L2240/54—Drive Train control parameters related to batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/60—Regenerative braking
Abstract
The invention provides an energy recovery method and system of an electric automobile, wherein the system comprises the following steps: the system comprises a vehicle control unit, a primary energy storage device and an auxiliary energy storage device; and the vehicle control unit is used for determining the current target working condition of the vehicle, acquiring the braking torque required under the target working condition, and distributing the kinetic energy generated by the braking torque to the main energy storage device and/or the auxiliary energy storage device for storage. The system is especially used for recovering energy through the auxiliary energy storage device when the main energy storage device cannot recover the energy, so that the problem that the energy is wasted because the existing main energy storage device cannot continuously recover the energy when the electric quantity of the battery is higher due to the influence of factors such as the electric quantity of the battery, the monomer voltage and the temperature of the battery like a power battery is solved, and the energy recovery efficiency is improved.
Description
Technical Field
The invention relates to the field of vehicle engineering, in particular to an energy recovery method and system for an electric automobile.
Background
Under the impetus of various government good and profitable policies and the active exploration of various automobile enterprises, electric automobiles are widely applied at present. With the increase of the customer population, the driving range problem of the electric automobile is increasingly highlighted, but the energy density of the battery is still the bottleneck of the electric automobile, and the difficulty is higher by increasing the energy density of the battery to increase the energy storage of the battery. Therefore, energy recovery rate is one of the major concerns of the automotive industry.
At present, most energy of an electric automobile is still consumed in the aspect of mechanical braking in a braking recovery stage, and the recovered energy is relatively small; in addition, in practical application, due to the influence of factors such as the electric quantity of the battery, the voltage of the single battery, the temperature and the like, when the electric quantity of the power battery is high, energy recovery is not allowed to prevent the power battery from being overcharged, and at the moment, the energy is wasted. Therefore, the problem of energy waste exists in the conventional energy recovery, and the energy recovery efficiency is low.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide an energy recovery system for an electric vehicle, so as to distribute kinetic energy of braking torque required under a current target working condition of the vehicle to a main energy storage device and an auxiliary energy storage device for storage, so as to solve the problem that an existing power battery cannot continue to recover energy when the battery capacity is high due to influences of battery capacity, cell voltage, temperature and other factors, and thus energy is wasted.
The second purpose of the invention is to provide an energy recovery method of an electric automobile.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an energy recovery system for an electric vehicle, including: the system comprises a vehicle control unit, a primary energy storage device and an auxiliary energy storage device; and the vehicle control unit is used for determining the current target working condition of the vehicle, acquiring the braking torque required under the target working condition, and distributing the kinetic energy generated by the braking torque to the main energy storage device and/or the auxiliary energy storage device for storage.
According to the energy recovery system of the electric automobile, the current target working condition of the vehicle is determined through the vehicle controller, the braking torque required under the target working condition is obtained, and the kinetic energy generated by the braking torque is distributed to the main energy storage device and the auxiliary energy storage device, so that the kinetic energy generated by the braking torque required under the corresponding target working condition is distributed to the two storage devices for storage. Especially, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that energy is wasted because the conventional main energy storage device such as a power battery cannot continuously recover energy when the battery power is high due to the influence of factors such as the battery power, the cell voltage and the temperature is solved, and the energy recovery efficiency is improved.
In addition, the energy recovery system of the electric vehicle in the embodiment of the invention has the following additional technical characteristics:
in one embodiment of the present invention, the energy recovery system of the electric vehicle further includes: the system comprises a brake pedal, an accelerator pedal, a first sensor corresponding to the brake pedal and a second sensor corresponding to the accelerator pedal; the first sensor is used for detecting the state of the brake pedal; a second sensor for detecting a state of an accelerator pedal; the vehicle control unit is used for acquiring data detected by the first sensor and data detected by the second sensor, determining the state of a brake pedal according to the data detected by the first sensor, determining the state of an accelerator pedal according to the data detected by the second sensor, and determining a target working condition as a sliding feedback working condition when the accelerator pedal and the brake pedal are in a released state in a set rotating speed interval; alternatively, when the accelerator pedal is in a released state and the brake pedal is in a depressed state, the target operating condition is determined to be a brake feedback operating condition.
In one embodiment of the invention, the vehicle control unit is specifically configured to acquire vehicle data of a vehicle under a target working condition; wherein the vehicle data includes: the method comprises the steps of obtaining braking torque by inquiring a preset torque table according to vehicle data and obtaining the braking torque.
In an embodiment of the invention, the vehicle control unit is further configured to determine whether the braking torque exceeds a preset threshold value when the target condition is a coasting feedback condition, and control the brake lamp to be turned on when the braking torque exceeds the preset threshold value.
In an embodiment of the present invention, the vehicle control unit is specifically configured to: when the target working condition is a sliding feedback working condition, converting all kinetic energy generated by braking torque into first electric energy; determining second electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining third electric energy recovered by the auxiliary energy storage device according to the converted first electric energy and the converted second electric energy, wherein the sum of the second electric energy and the third electric energy is equal to the first electric energy; the energy recovery system of the electric automobile further comprises: an energy recovery controller; and the energy recovery controller is used for receiving the second electric energy and the third electric energy sent by the vehicle control unit, controlling the main energy storage device to recover energy according to the second electric energy, and controlling the auxiliary energy storage device to recover energy according to the third electric energy. And the energy recovery controller is used for receiving the second electric energy and the third electric energy sent by the vehicle control unit, controlling the main energy storage device to recover energy according to the second electric energy, and controlling the auxiliary energy storage device to recover energy according to the third electric energy.
In an embodiment of the present invention, the vehicle control unit is specifically configured to: when the target working condition is a braking feedback working condition, determining energy which can be recovered in an electric energy form in kinetic energy generated by braking torque and converting the energy into fourth electric energy; determining fifth electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining sixth electric energy recovered by the auxiliary energy storage device according to the fourth electric energy and the fifth electric energy, wherein the sum of the fifth electric energy and the sixth electric energy is equal to the fourth electric energy; the energy controller is further used for receiving fifth electric energy and sixth electric energy sent by the vehicle control unit, controlling the main energy storage device to recover energy according to the fifth electric energy, and controlling the auxiliary energy storage device to recover energy according to the sixth electric energy.
In one embodiment of the invention, the vehicle control unit is further configured to distribute kinetic energy generated by braking torque, except for kinetic energy converted into fourth electric energy, to the braking system for mechanical braking, and to control the brake lamp to be turned on.
In one embodiment of the invention, a braking system includes: the brake system comprises a brake master cylinder, a brake system controller and a pressure sensor arranged on the brake master cylinder; the pressure sensor is used for detecting the current pressure applied to the brake master cylinder and feeding back the current pressure to the brake system controller; the brake system controller is used for feeding back the current pressure to the whole vehicle controller; and the vehicle control unit is also used for correcting the braking torque according to the current pressure.
In one embodiment of the present invention, the energy recovery system of the electric vehicle further includes: a drive motor controller; the driving motor controller is respectively connected with the vehicle control unit, the motor, the main energy storage device and the auxiliary energy storage device; and the driving motor controller is used for receiving a control signal of the vehicle control unit for driving the motor to operate, acquiring electric energy from the main energy storage device and/or the auxiliary energy storage device under the control of the control signal, and driving the motor to operate by the acquired electric energy.
In one embodiment of the invention, the primary energy storage device is connected in parallel with the secondary energy storage device.
In order to achieve the above object, a second embodiment of the present invention provides an energy recovery method for an electric vehicle, including: determining the current target working condition of the vehicle; obtaining the braking torque required under the target working condition; kinetic energy generated by the braking torque is distributed to the primary energy storage device and/or the auxiliary energy storage device for storage.
According to the energy recovery method of the electric automobile, the target working condition of the vehicle at present is determined, the braking torque required under the target working condition is obtained, and the kinetic energy generated by the braking torque is distributed to the main energy storage device and the auxiliary energy storage device, so that the kinetic energy generated by the braking torque required under the corresponding target working condition is distributed to the two storage devices to be stored. Especially, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that energy is wasted because the conventional main energy storage device such as a power battery cannot continuously recover energy when the battery power is high due to the influence of factors such as the battery power, the cell voltage and the temperature is solved, and the energy recovery efficiency is improved.
In addition, the energy recovery method for the electric vehicle in the embodiment of the invention has the following additional technical characteristics:
in one embodiment of the present invention, determining the current target operating condition of the vehicle comprises: detecting states of an accelerator pedal and a brake pedal on a vehicle; when the accelerator pedal and the brake pedal are in a released state in a set rotating speed interval, determining the target working condition as a sliding feedback working condition; alternatively, when the accelerator pedal is in a released state and the brake pedal is in a depressed state, the target operating condition is determined to be a brake feedback operating condition.
In one embodiment of the present invention, obtaining a desired braking torque at a target operating condition comprises: collecting vehicle data of a vehicle under a target working condition; wherein the vehicle data includes: battery data, motor data, accelerator pedal opening, brake pedal opening and current vehicle speed; and inquiring a preset torque table according to vehicle data to obtain the braking torque.
In one embodiment of the invention, when the target working condition is a sliding feedback working condition, whether the braking torque exceeds a preset threshold value is judged; and if the preset threshold value is exceeded, controlling the brake lamp to be lightened.
In one embodiment of the present invention, when the target operating condition is a coasting feedback operating condition, the kinetic energy generated by the braking torque is distributed to the main energy storage device and/or the auxiliary energy storage device for storage, and the method comprises the following steps: converting kinetic energy generated by the braking torque into first electric energy; determining second electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a third electrical energy recovered by the auxiliary energy storage device based on the converted first electrical energy and the converted second electrical energy, wherein a sum of the second electrical energy and the third electrical energy is equal to the first electrical energy.
In one embodiment of the present invention, when the target operating condition is a brake feedback operating condition, the kinetic energy generated by the brake torque is distributed to the main energy storage device and/or the auxiliary energy storage device for storage, and the method comprises the following steps: determining energy which can be recovered in the form of electric energy in the kinetic energy generated by the braking torque and converting the energy into fourth electric energy; determining fifth electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a sixth electrical energy recovered by the auxiliary energy storage device based on the fourth electrical energy and a fifth electrical energy, wherein a sum of the fifth electrical energy and the sixth electrical energy is equal to the fourth electrical energy.
In one embodiment of the invention, the remaining kinetic energy of the kinetic energy generated by the braking torque is obtained except for the kinetic energy converted into the fourth electric energy; distributing the residual kinetic energy to a brake system for mechanical braking, and controlling a brake lamp to be lightened.
In one embodiment of the invention, the current pressure actually applied to the brake system is obtained; when the pressure generated by the residual kinetic energy in the mechanical braking is inconsistent with the current pressure, the braking torque is adjusted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an energy recovery system of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an energy recovery system of another electric vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an energy recovery system of another electric vehicle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an energy recovery system of another electric vehicle according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an energy recovery system of an electric vehicle according to an embodiment of the present invention;
fig. 6 is a flowchart of an energy recovery method for an electric vehicle according to an embodiment of the present invention;
FIG. 7 is a flowchart of an energy distribution method when a target operating condition of a vehicle is a coasting feedback operating condition according to an embodiment of the present invention;
fig. 8 is a flowchart of an energy distribution method when a target operating condition of a vehicle is a brake feedback operating condition according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An energy recovery method and system of an electric vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an energy recovery system of an electric vehicle according to an embodiment of the present invention. As shown in fig. 1, the energy recovery system of the electric vehicle includes: a hybrid vehicle controller 110, a primary energy storage device 120, and a secondary energy storage device 130.
The vehicle control unit 110 is configured to determine a target operating condition of the vehicle, obtain a braking torque required under the target operating condition, and distribute kinetic energy generated by the braking torque to the primary energy storage device 120 and the secondary energy storage device 130 for storage.
Where the primary energy storage device 120 may be a high voltage power battery and the secondary energy storage device 130 may be a battery, a super capacitor, etc.
In an embodiment of the present invention, a main energy storage device 120 and an auxiliary energy storage device 130 are connected in parallel, and the branches may be controlled by relays.
Further, as shown in fig. 2, the energy recovery system of the electric vehicle further includes: a brake pedal 140, an accelerator pedal 150, a first sensor 160 corresponding to the brake pedal, and a second sensor 170 corresponding to the accelerator pedal 150.
The first sensor 160 is used for detecting the state of the brake pedal 140; second sensor 170 is used to detect the state of accelerator pedal 150. Specifically, first sensor 160 and second sensor 170 may detect the states of brake pedal 140 and accelerator pedal 150 by detecting the current opening of brake pedal 140 and accelerator pedal 150, respectively, of the vehicle.
For example, when the first sensor 160 detects that the current opening degree of the brake pedal 140 of the vehicle is 0 during the driving of the electric vehicle, the vehicle control unit 110 may determine that the brake pedal 140 is in a released state currently according to the opening degree data of the brake pedal 140 detected by the first sensor 160, that is, the vehicle is not braked currently. When the second sensor 170 detects that the current opening degree of the accelerator pedal 150 of the vehicle is 0, the vehicle control unit 110 may determine that the accelerator pedal 150 is also in a released state according to the opening degree data of the accelerator pedal 150 detected by the second sensor 170, that is, the vehicle is not currently accelerated.
Thus, the vehicle controller 110 may determine the current target operating condition of the vehicle according to the data detected by the first sensor 160 and the second sensor 170.
Specifically, when the vehicle motor is in the set rotation speed interval, according to the data detected by the first sensor 160 and the second sensor 170, if it is determined that both the accelerator pedal 150 and the brake pedal 140 are in the released state, the vehicle controller 110 may determine that the current target operating condition of the vehicle is the coasting feedback operating condition, that is, the vehicle is currently in the coasting state; if it is determined that the accelerator pedal 150 is in the released state and the brake pedal 140 is in the depressed state, it may be determined that the target operating condition in which the vehicle is currently located is a brake feedback operating condition, that is, the vehicle is currently in the braking state.
After the vehicle controller 110 determines the current target operating condition of the vehicle, the required braking torque may be obtained according to vehicle data under the target operating condition, where the vehicle data includes: battery data, motor data, accelerator pedal opening, brake pedal opening, current vehicle speed, etc.
Specifically, the vehicle can be tested under different vehicle data, and the corresponding relation between the vehicle data and the braking torque is established in advance according to the test result to form the torque table. The vehicle control unit 110 first obtains vehicle data from the first sensor 160, the second sensor 170, and the like, and then queries a preset torque table according to the obtained vehicle data of the vehicle under the current target working condition, so as to obtain a braking torque corresponding to the current vehicle data. The kinetic energy generated by the braking torque is distributed to the primary energy storage device 120 and the secondary energy storage device 130.
Since the braking torque is inversely proportional to the rotation speed of the electric motor, the greater the braking torque, the smaller the rotation speed of the electric motor, and then, when the vehicle is in a coasting state, the greater the braking torque required, the smaller the rotation speed of the electric motor, and the slower the vehicle coasting speed.
Based on this, when the target working condition of the vehicle is the sliding feedback working condition, the vehicle controller 110 can judge whether the required braking torque exceeds the preset threshold value, and when the required braking torque exceeds the preset threshold value, the vehicle controller controls the brake lamp to be turned on to remind the vehicle behind to reduce the speed, so as to avoid traffic accidents. And when the braking torque is smaller than a preset threshold value, the brake lamp is not lightened.
In the sliding process of the electric automobile, in order to more accurately control the state of the brake lamp, a value obtained by simulating the magnitude of the braking force when the brake pedal is stepped down to light the brake lamp and calibrating the actual automobile can be used as a preset threshold value.
The distribution of kinetic energy generated by braking torque of the vehicle under different target operating conditions is described below.
As shown in fig. 3, on the basis of fig. 2, the energy recovery system of the electric vehicle further includes: an energy recovery controller 180.
The energy recovery controller 180 is connected to the vehicle control unit 110, the primary energy storage device 120, and the secondary energy storage device 130.
In the driving process of the vehicle, when the vehicle controller 110 determines that the current target working condition of the vehicle is the coasting feedback working condition, all kinetic energy generated by the braking torque is converted into first electric energy. The difference obtained by subtracting the current residual electric energy from the total electric energy that can be accommodated by the primary energy storage device 120 is the secondary electric energy recovered by the primary energy storage device 120. The difference obtained by subtracting the second electric energy from the first electric energy is the third electric energy recovered by the auxiliary energy storage device 130, that is, the sum of the second electric energy and the third electric energy is the first electric energy.
For example, it is assumed that the kinetic energy generated by the braking torque is all converted into the first electric energy with the magnitude of 5 × 106J, the total electrical energy that the primary energy storage device 120 may hold is 10 × 106J, the current residual power is 7 × 106J. The current remaining electric energy is subtracted from the total electric energy which can be accommodated, and the owner can be determinedThe second amount of electrical energy recovered by energy storage device 120 is 3 × 106J. After determining the amount of electrical energy recovered by the primary energy storage device 120, a third electrical energy 2 × 10 is obtained by subtracting the second electrical energy recovered by the primary energy storage device from the first electrical energy6J, which is the amount of electrical energy recovered by the auxiliary energy storage device 130.
After the vehicle control unit 110 determines that the second electric energy recovered by the primary energy storage device 120 and the third electric energy recovered by the secondary energy storage device 130 are completed, the second electric energy and the third electric energy are transmitted to the energy recovery controller 180. The energy recovery controller 180 controls the main energy storage device 120 to perform energy recovery based on the second electric energy, and controls the auxiliary energy recovery device 130 to perform energy recovery based on the third electric energy.
Therefore, when the target working condition of the vehicle is a sliding feedback working condition, after the kinetic energy generated by the braking torque is converted into the electric energy, the electric energy recovered by the main energy storage device is determined, and then the electric energy recovered by the auxiliary energy storage device is determined.
In the embodiment of the invention, when the vehicle is in a coasting feedback working condition, all kinetic energy generated by braking torque is converted into electric energy, and when the main energy storage device cannot store and recover all converted electric energy, the auxiliary energy storage device recovers the rest electric energy. That is, the auxiliary energy storage device is primarily used to store energy outside the storable range of the primary energy storage device to which it is assisting.
According to the scheme provided by the embodiment of the invention, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that the energy is wasted because the conventional main energy storage device such as a power battery can not continuously recover energy when the electric quantity of the battery is high due to the influence of factors such as the electric quantity of the battery, the voltage of a monomer and the temperature is solved, and the energy recovery efficiency is improved.
In the driving process of the electric vehicle, when the vehicle controller 110 determines that the target working condition of the vehicle is the braking feedback working condition, the energy which can be recovered in the form of electric energy in the kinetic energy generated by the braking torque is determined and converted into fourth electric energy. Then, a fifth electrical energy recovered by the main energy storage device 120 is determined according to the total electrical energy that can be accommodated by the main energy storage device 120 and the current remaining electrical energy, wherein the fifth electrical energy is equal to the total electrical energy that can be accommodated minus the current remaining electrical energy. The fifth electric energy is subtracted from the fourth electric energy to obtain a sixth electric energy, which is the electric energy recovered by the auxiliary energy storage device 130.
The hybrid controller 110, after determining the fifth electrical energy recovered by the primary energy storage device 120 and the sixth electrical energy recovered by the secondary energy storage device 130, transmits the fifth electrical energy and the sixth electrical energy to the energy recovery controller 180. The energy recovery controller 180 controls the main energy storage device 120 to recover energy according to the fifth electric energy, and controls the auxiliary energy recovery device 130 to recover energy according to the sixth electric energy.
Therefore, when the current target working condition of the vehicle is the braking feedback working condition, after the kinetic energy generated by the braking torque can be converted into the electric energy in the form of the electric energy recovered, the electric energy recovered by the main energy storage device is determined firstly, and then the electric energy recovered by the auxiliary energy storage device is determined.
In the embodiment of the invention, when the target working condition of the vehicle is a braking feedback working condition, part of kinetic energy generated by braking torque can be recovered in the form of electric energy and converted into electric energy for recovery, and the other part of kinetic energy is distributed to the braking system by the vehicle control unit for mechanical braking.
As shown in fig. 4, the brake system includes: a master cylinder 190, a brake system controller 1100, and a pressure sensor 1110.
Among them, the pressure sensor 1110 is provided on the master cylinder 190 for detecting a current pressure applied to the master cylinder 190 and feeding back to the brake system controller 1100. The brake system controller 1100 feeds back the current pressure to the vehicle control unit 110. The vehicle control unit 110 may correct the braking torque according to the current pressure.
When the target working condition of the vehicle is a brake feedback working condition, namely the brake pedal is in a treading state, the pressure sensor on the brake master cylinder detects the current pressure applied on the brake master cylinder and feeds back the current pressure to the brake system controller, and the brake system controller feeds back the current pressure to the whole vehicle controller so as to carry out real-time verification.
The pressure generated by the kinetic energy distributed to the brake system may be inconsistent with the current pressure due to wear of the brake pedal or inconsistent installation conditions of each vehicle resulting in inconsistent idle travel. When an error exists, the vehicle control unit can adjust and correct the braking torque. For example, the pressure applied to the brake master cylinder is 100 n, and the actually detected pressure on the brake master cylinder is 80 n, which indicates that the braking force is insufficient at this time, and the vehicle controller may increase the braking torque so that the pressure on the brake master cylinder reaches 100 n.
According to the scheme provided by the embodiment of the invention, when the electric automobile is in a braking state, the relation between energy recovery and mechanical braking can be intelligently balanced, so that the energy can be recovered to the maximum extent.
During the driving process of the electric vehicle, the energy stored in the main energy storage device and the auxiliary energy storage device can be used for driving the motor to operate.
As shown in fig. 5, the energy recovery system of the electric vehicle further includes: driving the motor controller 1120.
The driving motor controller 1120 is connected to the vehicle control unit 110, the motor, the main energy storage device 120, and the auxiliary energy storage device 130, respectively.
The driving motor controller 1120 is configured to receive a control signal of the vehicle control unit for driving the motor to operate, obtain electric energy from the main energy storage device and/or the auxiliary energy storage device under the control of the control signal, and drive the motor to operate by the obtained electric energy.
During the driving process of the electric vehicle, the vehicle control unit 110 may send a control signal for driving the motor to operate to the driving motor controller 1120, and after receiving the control signal, the driving motor controller 1120 may obtain electric energy from the main energy storage device 120 and the auxiliary energy storage device 130 according to the control signal, and drive the motor to operate by the obtained electric energy.
In order to improve the utilization efficiency of the electric energy, in practical application, the electric energy stored in the auxiliary energy storage device can be preferentially used in the discharging stage, and the electric energy in the main energy storage device is used after the electric energy in the auxiliary energy storage device is used.
According to the energy recovery system of the electric automobile, the current target working condition of the vehicle is determined through the vehicle controller, the braking torque required under the target working condition is obtained, and the kinetic energy generated by the braking torque is distributed to the main energy storage device and the auxiliary energy storage device, so that the kinetic energy generated by the braking torque required under the corresponding target working condition is distributed to the two storage devices for storage. Especially, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that energy is wasted because the conventional main energy storage device such as a power battery cannot continuously recover energy when the battery power is high due to the influence of factors such as the battery power, the cell voltage and the temperature is solved, and the energy recovery efficiency is improved.
In order to achieve the above object, an embodiment of the present invention further provides an energy recovery method for an electric vehicle. As shown in fig. 6, the energy recovery method for an electric vehicle includes:
and S601, determining the current target working condition of the vehicle.
In the embodiment of the present invention, sensors may be installed on the accelerator pedal and the brake pedal, respectively, to detect states of the accelerator pedal and the brake pedal through the sensors. Specifically, the opening data of the accelerator pedal and the brake pedal may be acquired by a sensor, and the states of the accelerator pedal and the brake pedal may be determined based on the opening data detected by the sensor.
For example, when the sensor detects that the current brake pedal opening degree of the vehicle is 0 during the running of the electric vehicle, it may be determined that the brake pedal is currently in a released state, that is, the vehicle is not braked currently. When the sensor detects that the current accelerator opening of the vehicle is 0, it can be determined that the accelerator is also in a released state, that is, the vehicle is not currently accelerating.
The states of an accelerator pedal and a brake pedal are determined, and the current target working condition of the vehicle can be determined according to the states of the brake pedal and the accelerator pedal. Specifically, when the motor of the vehicle is in a set rotating speed interval, according to data detected by a sensor, if the accelerator pedal and the brake pedal are determined to be in a released state, the target working condition of the vehicle at present can be determined to be a sliding feedback working condition, namely the vehicle is currently in a sliding state; if it is determined that the accelerator pedal is in a released state and the brake pedal is in a depressed state, it may be determined that the target operating condition at which the vehicle is currently located is a brake feedback operating condition, that is, the vehicle is currently in a braking state.
And S602, acquiring the braking torque required under the target working condition.
After the target working condition of the vehicle is determined, the required braking torque can be obtained according to the vehicle data under the target working condition, wherein the vehicle data comprises: battery data, motor data, accelerator pedal opening, brake pedal opening, current vehicle speed, etc.
Specifically, the vehicle can be tested under different vehicle data, and the corresponding relation between the vehicle data and the braking torque is established in advance according to the test result to form the torque table. The method comprises the steps of obtaining vehicle data from a sensor or other devices, inquiring a preset torque table according to the obtained vehicle data of the vehicle under the current target working condition, and obtaining braking torque corresponding to the current vehicle data.
And S603, distributing the kinetic energy generated by the braking torque to a main energy storage device and/or an auxiliary energy storage device for storage.
The kinetic energy generated by the braking torque is distributed to the primary and secondary energy storage devices depending on the target operating conditions the vehicle is in.
The main energy storage device may be a high-voltage power battery, and the auxiliary energy storage device may be a storage battery, a super capacitor, or the like. In an embodiment of the invention, the main energy storage device and the auxiliary energy storage device are connected in parallel, and the branch circuit can be controlled by a relay.
The distribution of kinetic energy generated by braking torque for different target operating conditions of the vehicle will now be described with reference to fig. 7 and 8.
When the target working condition of the vehicle is the coasting feedback working condition, the distribution method of the electric energy is shown in fig. 7.
And S701, obtaining the braking torque under the sliding feedback working condition.
The method for obtaining the braking torque is as described above and will not be described herein.
S702, judging whether the braking torque exceeds a preset threshold value.
Since the braking torque is inversely proportional to the rotation speed of the electric motor, the greater the braking torque, the smaller the rotation speed of the electric motor, and then, when the vehicle is in a coasting state, the greater the braking torque required, the smaller the rotation speed of the electric motor, and the slower the vehicle coasting speed.
Based on the method, when the target working condition of the vehicle is the sliding feedback working condition, whether the required braking torque exceeds a preset threshold value is judged. In the sliding process of the electric automobile, in order to more accurately control the state of the brake lamp, a value obtained by simulating the magnitude of the braking force when the brake pedal is stepped down to light the brake lamp and calibrating the actual automobile can be used as a preset threshold value.
When the braking torque exceeds the preset threshold value, step S703 is executed, and the control lights the brake lamp to remind the vehicle behind to reduce the speed, so as to avoid traffic accidents. When the braking torque does not exceed the preset threshold, step S704 is executed, and the brake lamp is not turned on.
And S705, distributing the kinetic energy generated by the braking torque.
The kinetic energy generated by the braking torque is completely converted into first electric energy, and the difference value obtained by subtracting the current residual electric energy from the total electric energy which can be accommodated by the main energy storage device is the second electric energy recovered by the main energy storage device. The difference obtained by subtracting the second electric energy from the first electric energy is the third electric energy recovered by the auxiliary energy storage device, that is, the sum of the second electric energy and the third electric energy is the first electric energy.
For example, it is assumed that the kinetic energy generated by the braking torque is all converted into the first electric energy with the magnitude of 5 × 106J, the total electrical energy that the primary energy storage device can hold is 10 × 106J, the current residual power is 7 × 106J. The current remaining power is subtracted from the total power that can be accommodated to determine that the second power recovered by the primary energy storage device is 3 × 106J. Determining the amount of electrical energy recovered by the primary energy storage device, subtracting from the first electrical energy a third electrical energy 2 × 10 derived from the second electrical energy recovered by the primary energy storage device6J, the size of the electric energy recovered by the auxiliary energy storage device is obtained.
And then, controlling the main energy storage device to recover energy according to the second electric energy, and controlling the auxiliary energy recovery device to recover energy according to the third electric energy.
Therefore, when the target working condition of the vehicle is a sliding feedback working condition, after all kinetic energy generated by braking torque is converted into electric energy, the electric energy recovered by the main energy storage device is determined, and then the electric energy recovered by the auxiliary energy storage device is determined.
In the embodiment of the invention, when the vehicle is in a coasting feedback working condition, all kinetic energy generated by braking torque is converted into electric energy, and when the main energy storage device cannot store and recover all converted electric energy, the auxiliary energy storage device recovers the rest electric energy. That is, the auxiliary energy storage device is primarily used to store energy outside the storable range of the primary energy storage device to which it is assisting.
According to the scheme provided by the embodiment of the invention, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that the energy is wasted because the conventional main energy storage device such as a power battery can not continuously recover energy when the electric quantity of the battery is high due to the influence of factors such as the electric quantity of the battery, the voltage of a monomer and the temperature is solved, and the energy recovery efficiency is improved.
When the target condition of the vehicle is the brake feedback condition, the distribution method of the electric energy is shown in fig. 8.
And S801, controlling a brake lamp to be lightened when the brake pedal is detected to be pressed down.
During the whole energy recovery process, the brake pedal can be detected, and different from the method for lighting the brake lamp under the sliding feedback working condition, when the brake pedal is detected to be pressed down, the brake system can control the brake lamp to be lighted.
S802, obtaining the braking torque under the braking feedback working condition.
The method for obtaining the braking torque under the braking feedback condition is as described above, and is not described herein again.
And S803, distributing the kinetic energy generated by the braking torque.
In the embodiment of the invention, when the target working condition of the vehicle is a braking feedback working condition, part of kinetic energy generated by braking torque can be recovered in the form of electric energy and converted into electric energy for recovery, and the other part of kinetic energy is distributed to a braking system for mechanical braking.
The pressure that can be generated and distributed to the brake system may not be consistent with the current pressure due to wear of the brake pedal or inconsistent installation conditions of each vehicle resulting in inconsistent idle travel. When there is an error, an adjustment correction may be made to the braking torque. Specifically, the current pressure actually applied to the brake system is obtained by the pressure sensor, and the brake torque is adjusted when the pressure generated at the time of mechanical braking does not coincide with the current pressure, among the kinetic energy generated by the brake torque, the remaining kinetic energy except for the kinetic energy converted into the fourth electric energy.
For example, the pressure applied to the brake master cylinder is 100 n, and the actually detected pressure on the brake master cylinder is 80 n, which indicates that the braking force is insufficient at this time, and the vehicle controller may increase the braking torque so that the pressure on the brake master cylinder reaches 100 n.
And S804, energy recovery and distribution.
After determining the energy recoverable in the form of electrical energy and converting the energy into fourth electrical energy, determining fifth electrical energy recovered by the main energy storage device according to the total electrical energy which can be accommodated by the main energy storage device and the current remaining electrical energy, wherein the fifth electrical energy is equal to the total electrical energy which can be accommodated minus the current remaining electrical energy. And subtracting the fifth electric energy from the fourth electric energy to obtain sixth electric energy, wherein the sixth electric energy is the electric energy recovered by the auxiliary energy storage device. And finally, controlling the main energy storage device to recover energy according to the fifth electric energy, and controlling the auxiliary energy recovery device to recover energy according to the sixth electric energy.
Therefore, when the current target working condition of the vehicle is the braking feedback working condition, after the kinetic energy generated by the braking torque can be converted into the electric energy in the form of the electric energy recovered, the electric energy recovered by the main energy storage device is determined firstly, and then the electric energy recovered by the auxiliary energy storage device is determined.
It should be noted that, during energy recovery under the slip feedback condition and the brake feedback condition, the condition of the whole vehicle needs to be considered, for example, whether the vehicle is in a normal working state or whether a fault occurs needs to be determined.
In conclusion, when the vehicle is under the slip feedback working condition, all kinetic energy generated by braking torque is converted into electric energy to be recycled; when the vehicle is in a braking feedback working condition, the kinetic energy generated by braking torque is divided into two parts, one part can be converted into electric energy for recycling in an electric energy form, and the other part is distributed to a braking system for mechanical braking.
According to the energy recovery method of the electric automobile, the target working condition of the vehicle at present is determined, the braking torque required under the target working condition is obtained, and the kinetic energy generated by the braking torque is distributed to the main energy storage device and the auxiliary energy storage device, so that the kinetic energy generated by the braking torque required under the corresponding target working condition is distributed to the two storage devices to be stored. Especially, when the main energy storage device can not recover energy, the auxiliary energy storage device recovers energy, so that the problem that energy is wasted because the conventional main energy storage device such as a power battery cannot continuously recover energy when the battery power is high due to the influence of factors such as the battery power, the cell voltage and the temperature is solved, and the energy recovery efficiency is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. An energy recovery system for an electric vehicle, comprising:
the system comprises a vehicle control unit, a primary energy storage device and an auxiliary energy storage device;
the vehicle control unit is used for determining a target working condition of a vehicle at present, acquiring a braking torque required under the target working condition, and distributing kinetic energy generated by the braking torque to a main energy storage device and/or an auxiliary energy storage device for storage;
the system further comprises: the system comprises a brake pedal, an accelerator pedal, a first sensor corresponding to the brake pedal and a second sensor corresponding to the accelerator pedal;
the first sensor is used for detecting the state of the brake pedal;
the second sensor is used for detecting the state of the accelerator pedal;
the vehicle control unit is used for acquiring data detected by the first sensor and data detected by the second sensor, determining the state of the brake pedal according to the data detected by the first sensor, determining the state of the accelerator pedal according to the data detected by the second sensor, and determining the target working condition as a sliding feedback working condition when the accelerator pedal and the brake pedal are in a released state within a set rotating speed interval; or when the accelerator pedal is in a released state and the brake pedal is in a treading state, determining that the target working condition is a brake feedback working condition;
the vehicle control unit is specifically used for: when the target working condition is the sliding feedback working condition, converting all kinetic energy generated by the braking torque into first electric energy; determining second electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a third electrical energy recovered by the auxiliary energy storage device from the converted first and second electrical energy, wherein the sum of the second and third electrical energy is equal to the first electrical energy; when the target working condition is the braking feedback working condition, determining energy which can be recovered in an electric energy form in kinetic energy generated by the braking torque and converting the energy into fourth electric energy; determining fifth electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a sixth electrical energy recovered by the auxiliary energy storage device from the fourth electrical energy and the fifth electrical energy, wherein the sum of the fifth electrical energy and the sixth electrical energy is equal to the fourth electrical energy;
the vehicle control unit is further used for judging whether the braking torque exceeds a preset threshold value when the target working condition is a sliding feedback working condition, and controlling a braking lamp to be turned on when the braking torque exceeds the preset threshold value.
2. The energy recovery system of the electric vehicle according to claim 1, wherein the vehicle control unit is specifically configured to obtain vehicle data of the vehicle under the target operating condition; wherein the vehicle data includes: battery data, motor data, the opening degree of an accelerator pedal, the opening degree of a brake pedal and the current vehicle speed, and inquiring a preset torque table according to the vehicle data to obtain the brake torque.
3. The energy recovery system of an electric vehicle according to claim 2, further comprising: an energy recovery controller;
the energy recovery controller is respectively connected with the vehicle control unit, the main energy storage device and the auxiliary energy storage device;
the energy recovery controller is configured to receive the second electric energy and the third electric energy sent by the vehicle controller, control the primary energy storage device to recover energy according to the second electric energy, and control the secondary energy storage device to recover energy according to the third electric energy.
4. The energy recovery system of claim 3, wherein the energy recovery controller is further configured to receive the fifth electric energy and the sixth electric energy sent by the vehicle controller, control the primary energy storage device to recover energy according to the fifth electric energy, and control the auxiliary energy storage device to recover energy according to the sixth electric energy.
5. The energy recovery system of claim 4, wherein the vehicle control unit is further configured to distribute kinetic energy generated by the braking torque, except for kinetic energy converted into the fourth electric energy, to a braking system for mechanical braking, and to control a brake lamp to be turned on.
6. The energy recovery system of an electric vehicle of claim 5, wherein the braking system comprises: the brake system comprises a brake master cylinder, a brake system controller and a pressure sensor arranged on the brake master cylinder;
the pressure sensor is used for detecting the current pressure applied to the brake master cylinder and feeding back the current pressure to the brake system controller;
the brake system controller is used for feeding the current pressure back to the vehicle control unit;
and the vehicle control unit is also used for correcting the braking torque according to the current pressure.
7. The energy recovery system of an electric vehicle according to claim 4, further comprising: a drive motor controller; the driving motor controller is respectively connected with the vehicle control unit, the motor, the main energy storage device and the auxiliary energy storage device;
the driving motor controller is used for receiving a control signal of the vehicle control unit for driving the motor to operate, acquiring electric energy from the main energy storage device and/or the auxiliary energy storage device under the control of the control signal, and driving the motor to operate through the acquired electric energy.
8. The energy recovery system of an electric vehicle according to any one of claims 1-7, wherein said primary energy storage device is connected in parallel with said secondary energy storage device.
9. An energy recovery method for an electric vehicle, comprising:
determining a current target working condition of the vehicle, wherein the determining the current target working condition of the vehicle comprises the following steps: detecting states of an accelerator pedal and a brake pedal on the vehicle; when the accelerator pedal and the brake pedal are in a released state in a set rotating speed interval, determining the target working condition as a sliding feedback working condition; or when the accelerator pedal is in a released state and the brake pedal is in a treading state, determining that the target working condition is a brake feedback working condition;
obtaining the braking torque required under the target working condition;
distributing the kinetic energy generated by the braking torque to a main energy storage device and/or an auxiliary energy storage device for storage, and distributing the kinetic energy generated by the braking torque to the main energy storage device and/or the auxiliary energy storage device for storage when the target working condition is the coasting feedback working condition, wherein the method comprises the following steps: converting kinetic energy generated by the braking torque into first electric energy; determining second electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a third electrical energy recovered by the auxiliary energy storage device from the converted first and second electrical energy, wherein the sum of the second and third electrical energy is equal to the first electrical energy;
when the target operating condition is the brake feedback operating condition, distributing the kinetic energy generated by the brake torque to a main energy storage device and/or an auxiliary energy storage device for storage, wherein the distributing comprises: determining the energy which can be recovered in the form of electric energy in the kinetic energy generated by the braking torque and converting the kinetic energy into fourth electric energy; determining fifth electric energy recovered by the main energy storage device according to the total electric energy which can be accommodated by the main energy storage device and the current residual electric energy; determining a sixth electrical energy recovered by the auxiliary energy storage device from the fourth electrical energy and the fifth electrical energy, wherein the sum of the fifth electrical energy and the sixth electrical energy is equal to the fourth electrical energy;
when the target working condition is a sliding feedback working condition, judging whether the braking torque exceeds a preset threshold value; and if the preset threshold value is exceeded, controlling the brake lamp to be lightened.
10. The energy recovery method of an electric vehicle according to claim 9, wherein the obtaining of the braking torque required under the target operating condition comprises:
acquiring vehicle data of the vehicle under the target working condition; wherein the vehicle data includes: battery data, motor data, the accelerator pedal opening, the brake pedal opening and the current vehicle speed;
and inquiring a preset torque table according to the vehicle data to obtain the braking torque.
11. The energy recovery method for an electric vehicle according to claim 9, further comprising:
acquiring the remaining kinetic energy of the kinetic energy generated by the braking torque except for the kinetic energy converted into the fourth electric energy;
and distributing the residual kinetic energy to a brake system for mechanical braking, and controlling a brake lamp to be turned on.
12. The energy recovery method for an electric vehicle according to claim 11, further comprising:
acquiring the current pressure actually applied to a brake system;
and when the pressure generated by the residual kinetic energy in the mechanical braking is inconsistent with the current pressure, adjusting the braking torque.
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| CN108638870A (en) * | 2018-05-15 | 2018-10-12 | 东风裕隆汽车有限公司 | A kind of energy recycle device and control circuit of electric vehicle |
| CN110497797A (en) * | 2018-05-18 | 2019-11-26 | 罗伯特·博世有限公司 | Energy recovery control method, energy recovery control system, computer storage medium and automobile |
| CN113561783B (en) * | 2020-04-28 | 2023-10-20 | 北京新能源汽车股份有限公司 | Energy recovery control method and device of distributed driving system and electric automobile |
| CN114604212B (en) * | 2022-03-30 | 2023-03-31 | 东风商用车有限公司 | Fully-decoupled braking energy recovery control method, device, equipment and storage medium |
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