CN107745639B - Energy feedback method, energy feedback system and vehicle - Google Patents
Energy feedback method, energy feedback system and vehicle Download PDFInfo
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- CN107745639B CN107745639B CN201710802179.6A CN201710802179A CN107745639B CN 107745639 B CN107745639 B CN 107745639B CN 201710802179 A CN201710802179 A CN 201710802179A CN 107745639 B CN107745639 B CN 107745639B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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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
- B60L7/18—Controlling the braking effect
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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
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
- B60L2240/16—Acceleration longitudinal
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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
- B60L2240/425—Temperature
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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
- B60L2240/545—Temperature
Abstract
The invention discloses an energy feedback method, an energy feedback system and a vehicle, wherein the energy feedback method comprises the following steps: detecting whether the current state of the vehicle meets a brake feedback condition; when the brake feedback condition is met, automatically selecting a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road surface condition and the brake deceleration, wherein the brake feedback gears are in one-to-one correspondence with mutually different brake feedback coefficient curves; obtaining a first brake feedback coefficient according to a brake feedback coefficient curve corresponding to the automatically selected brake feedback gear and the vehicle speed; obtaining a first brake feedback torque according to the brake torque and the first brake feedback coefficient; and performing energy feedback according to the first brake feedback torque. The invention has the following advantages: the energy feedback can be carried out to the maximum extent under the premise of stable running of the vehicle.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an energy feedback method, an energy feedback system and a vehicle.
Background
Nowadays, new energy automobiles are increasingly popularized, and electric automobiles develop very quickly due to the advantages of high energy utilization, little pollution and the like. The limitations of battery technology still make range a major obstacle to the development of electric vehicles. The energy feedback system can recover partial energy in the sliding and braking stages of the vehicle, so that the driving range of the vehicle and the utilization rate of the energy of the whole vehicle can be greatly improved.
The existing energy feedback technology is based on hybrid power and electric automobiles, when the vehicle decelerates and brakes, the motion energy of the vehicle is not converted into heat energy through a braking system, but can be converted into electric energy by a motor and stored in a storage battery for driving the vehicle to run. The energy feedback system of the current vehicle does not perform brake feedback according to the running condition, and has the defects of low brake feedback efficiency and low vehicle running stability.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
To this end, a first object of the present invention is to provide an energy feedback method that can maximize energy feedback of a vehicle under the precondition that the vehicle is stably driven.
In order to achieve the above object, an embodiment of the present invention discloses an energy feedback method, including the following steps: detecting whether the current state of the vehicle meets a brake feedback condition; when the brake feedback condition is met, automatically selecting a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road surface condition and the brake deceleration, wherein the brake feedback gears are in one-to-one correspondence with mutually different brake feedback coefficient curves; obtaining a first brake feedback coefficient according to a brake feedback coefficient curve corresponding to the automatically selected brake feedback gear and the vehicle speed; obtaining a first brake feedback torque according to the brake torque and the first brake feedback coefficient; and performing energy feedback according to the first brake feedback torque.
Further, the energy feedback according to the first brake feedback torque further comprises: manually selecting a brake feedback gear from the plurality of brake feedback gears; obtaining a second brake feedback coefficient according to a brake feedback coefficient curve corresponding to the manually selected brake feedback gear and the vehicle speed; obtaining a second brake feedback torque according to the brake torque and the second brake feedback coefficient; and performing energy feedback according to the second brake feedback torque.
Further, the brake feedback gears comprise low feedback brake gears, middle feedback brake gears and high feedback brake gears, and under the same vehicle speed, the brake feedback coefficient corresponding to the low feedback brake gears is less than or equal to that of the middle feedback brake gears; when the vehicle brakes when going downhill, the control system selects a high-feedback brake gear; when the braking deceleration of the vehicle is larger than the braking deceleration threshold value for braking, the control system selects a middle regenerative braking gear; when the vehicle is in the urban working condition for braking, the control system selects a high-feedback brake gear.
Further, the brake feedback condition is: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold.
According to the energy feedback method provided by the embodiment of the invention, the corresponding brake feedback gear is selected according to the working condition of the vehicle during braking, and then the brake feedback torque is obtained according to the vehicle speed to perform energy feedback, so that the energy feedback can be performed to the maximum extent on the premise that the vehicle is stable in running.
To this end, a second object of the present invention is to provide an energy feedback system that can maximize energy feedback of a vehicle under the precondition of stable driving.
In order to achieve the above object, an embodiment of the present invention discloses an energy feedback system, including: the detection module is used for detecting whether the current state of the vehicle meets a brake feedback condition; the vehicle speed information acquisition module is used for acquiring vehicle speed information; the braking torque information acquisition module is used for acquiring braking torque information; the road surface information acquisition module is used for acquiring road surface condition information; the brake feedback gear selecting module is used for selecting a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road surface condition and the brake deceleration when the brake feedback condition is met, wherein the brake feedback gears correspond to different brake feedback coefficient curves; the energy feedback module is used for carrying out energy feedback according to the braking feedback torque sent by the control module; the control module is used for obtaining a first brake feedback coefficient according to a brake feedback coefficient curve corresponding to the selected brake feedback gear and the vehicle speed, and further obtaining the brake feedback torque according to the brake torque and the brake feedback coefficient.
Furthermore, the brake feedback gear selection module comprises a plurality of brake feedback gear selection units, the brake feedback gear selection units and the brake feedback gears are arranged in a one-to-one correspondence manner, and corresponding brake feedback gears are selected from the brake feedback gear selection units.
Further, the brake feedback gear comprises a low feedback brake gear, a middle feedback brake gear and a high feedback brake gear, the brake feedback coefficient corresponding to the low feedback brake gear is less than or equal to the brake feedback coefficient of the middle feedback brake gear, and the brake feedback gear selection module is further configured to: when the vehicle brakes when going downhill, the control system selects a high-feedback brake gear; when the braking deceleration of the vehicle is larger than the braking deceleration threshold value for braking, the control system selects a middle regenerative braking gear; when the vehicle is in the urban working condition for braking, the control system selects a high-feedback brake gear.
Further, the brake feedback condition is: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold.
According to the energy feedback system disclosed by the embodiment of the invention, the corresponding brake feedback gear is selected according to the working condition of the vehicle during braking, and then the brake feedback torque is obtained according to the vehicle speed for energy feedback, so that the energy feedback can be carried out to the maximum extent on the premise that the vehicle is stably driven.
To this end, a third object of the invention is to provide a vehicle that can provide maximum energy recuperation on with the precondition of stable driving.
In order to achieve the above object, an embodiment of the present invention discloses a vehicle provided with the energy feedback system of the above embodiment.
The advantages of the vehicle of the embodiment of the invention and the energy feedback system of the embodiment of the invention are the same compared with the prior art.
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 above 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 flow chart of an energy feedback method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of brake feedback coefficient curves corresponding to three energy feedback gears in an energy feedback method according to an embodiment of the invention;
fig. 3 is a block diagram of an energy feedback system according to an embodiment of the 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The invention is described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of an energy feedback method according to an embodiment of the invention. As shown in fig. 1, the energy feedback method according to the embodiment of the present invention includes the following steps:
s1: and detecting whether the current state of the vehicle meets a brake feedback condition.
In one embodiment of the invention, the brake feedback condition is: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold.
The temperature of the motor is stably increased in the running process of the vehicle, the temperature of the motor can be further increased after energy feedback, and when the temperature of the motor exceeds the temperature threshold of the motor, the performance of the motor can be affected, so that whether the temperature of the motor exceeds the temperature threshold of the motor is judged before braking feedback. Wherein the motor temperature threshold is based on the difference between the maximum operating temperature of the motor and the temperature expected to be raised after brake feedback is applied.
When the charge capacity of the battery system is greater than the charge capacity threshold (for example, 80%), the energy feedback still performed at this time may cause polarization phenomenon in the battery system, which affects the battery capacity and the cycle life. Therefore, before braking feedback, whether the charge capacity of the battery system is smaller than the charge capacity threshold value or not is judged
When the temperature of the battery system is lower than the battery temperature threshold, the current fed back by the energy can cause crystallization on the surface of the negative electrode, and the accumulated crystallization can cause short circuit of the positive electrode and the negative electrode, so that whether the temperature of the battery system is greater than the battery temperature threshold is judged before braking feedback.
S2: and when the brake feedback condition is met, automatically selecting one brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road surface condition and the brake deceleration, wherein the brake feedback coefficients which are different from each other correspond to each other one by one.
Fig. 2 is a schematic diagram of brake feedback coefficient curves corresponding to three energy feedback gears in the energy feedback method according to an embodiment of the invention. In one embodiment of the invention, the brake feedback gears comprise low feedback brake gears, middle feedback brake gears and high feedback brake gears, and the brake feedback coefficient corresponding to the low feedback brake gears is less than or equal to that of the middle feedback brake gears and less than or equal to that of the high feedback brake gears under the same vehicle speed.
When the vehicle brakes when going downhill, the control system selects a high feedback brake gear to improve the brake feedback efficiency due to small demand on braking force;
when the braking deceleration of the vehicle is greater than the braking deceleration threshold (e.g., 2 m/s)2) When braking is carried out, the control system selects a middle feedback braking gear;
when the vehicle is braked under the urban working condition, the control system selects a high-feedback brake gear. Wherein, whether the vehicle is in the urban working condition can be determined through the Internet and a positioning system. Network data indicate that the energy consumed by braking accounts for more than half of the total energy of the drive, and the speed is concentrated between 15 and 50km/h, so that the energy feedback can be selected to the maximum extent in a high-feedback braking gear.
In addition, when the vehicle speed is low (for example, less than 15km/h below the vehicle speed), the braking energy is small, and the braking energy feedback is small, so that the braking energy feedback can not be started. When the vehicle goes uphill, in order to ensure the driving power and the stability, the braking energy can not be fed back even if the braking pedal signal is detected. When the vehicle runs on the highway, no braking energy feedback is carried out to ensure the running power and stability.
S3: and obtaining a first brake feedback coefficient according to the brake feedback coefficient curve corresponding to the automatically selected brake feedback gear and the vehicle speed. As can be seen from fig. 2, when the brake feedback gear is selected, a first brake feedback coefficient may be obtained according to the brake feedback gear and the vehicle speed.
S4: and obtaining a first brake feedback torque according to the brake torque and the first brake feedback coefficient, namely the first brake feedback torque is the brake torque and the first brake feedback coefficient.
S5: and performing energy feedback according to the first brake feedback torque.
In an embodiment of the present invention, after step S5, the method further includes: manually selecting a brake feedback gear from a plurality of brake feedback gears; obtaining a second brake feedback coefficient according to a brake feedback coefficient curve corresponding to the selected brake feedback gear and the vehicle speed; obtaining a second brake feedback torque according to the brake torque and the second brake feedback coefficient; and performing energy feedback according to the second brake feedback torque.
Specifically, after the energy feedback is performed in step S5, the driver adjusts the brake feedback gear according to personal needs, and the system performs energy feedback according to the adjusted brake feedback gear.
According to the energy feedback method provided by the embodiment of the invention, the corresponding brake feedback gear is selected according to the working condition of the vehicle during braking, and then the brake feedback torque is obtained according to the vehicle speed to perform energy feedback, so that the energy feedback can be performed to the maximum extent on the premise that the vehicle is stable in running.
Fig. 3 is a block diagram of an energy feedback system according to an embodiment of the invention. As shown in fig. 3, the energy feedback system of the embodiment of the invention includes: the system comprises a detection module 310, a vehicle speed information acquisition module 320, a brake torque information acquisition module 330, a road surface information acquisition module 340, a brake feedback gear selection module 350, an energy feedback module 360 and a control module 370.
The detecting module 310 is configured to detect whether a current state of the vehicle satisfies a brake feedback condition. The vehicle speed information obtaining module 320 is used for obtaining vehicle speed information. The braking torque information obtaining module 330 is configured to obtain braking torque information. The road surface information obtaining module 340 is used for obtaining road surface condition information. The brake feedback gear selection module 350 is configured to select a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road condition, and the brake deceleration when the brake feedback condition is satisfied, where the plurality of brake feedback gears correspond to different brake feedback coefficient curves. The energy feedback module 360 is used for performing energy feedback according to the brake feedback torque sent by the control module 370. The control module 370 is configured to obtain a first brake feedback coefficient according to the brake feedback coefficient curve corresponding to the selected brake feedback gear and the vehicle speed, and further obtain a brake feedback torque according to the brake torque and the brake feedback coefficient.
According to the energy feedback system disclosed by the embodiment of the invention, the corresponding brake feedback gear is selected according to the working condition of the vehicle during braking, and then the brake feedback torque is obtained according to the vehicle speed for energy feedback, so that the energy feedback can be carried out to the maximum extent on the premise that the vehicle is stably driven.
In an embodiment of the present invention, the brake feedback gear selection module 350 includes a plurality of brake feedback gear selection units, which are disposed in a one-to-one correspondence with the plurality of brake feedback gears, and selects a corresponding brake feedback gear from the plurality of brake feedback gear selection units.
In an embodiment of the present invention, the brake feedback gear includes a low feedback brake gear, a middle feedback brake gear and a high feedback brake gear, and the brake feedback coefficient corresponding to the low feedback brake gear is less than or equal to the brake feedback coefficient of the middle feedback brake gear and less than or equal to the brake feedback coefficient of the high feedback brake gear at the same vehicle speed, and the brake feedback gear selecting module 350 is further configured to: when the vehicle brakes when going downhill, the control system selects a high-feedback brake gear; when the braking deceleration of the vehicle is greater than the braking deceleration threshold value for braking, the control system selects a middle feedback braking gear; when the vehicle is braked under the urban working condition, the control system selects a high-feedback brake gear.
In one embodiment of the invention, the brake feedback condition is: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold.
It should be noted that, the specific implementation of the energy feedback system in the embodiment of the present invention is similar to the specific implementation of the energy feedback method in the embodiment of the present invention, and specific reference is made to the description of the method part, and details are not repeated for reducing redundancy.
In addition, the invention also discloses a vehicle which is provided with the energy feedback system of the embodiment. The vehicle can perform energy feedback to the maximum extent on the premise of stable running.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described in detail to reduce redundancy.
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 do not necessarily 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. An energy feedback method is characterized by comprising the following steps:
detecting whether the current state of the vehicle meets a brake feedback condition, wherein the brake feedback condition comprises the following steps: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold;
when the brake feedback condition is met, automatically selecting a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road surface condition and the brake deceleration, wherein the brake feedback gears are in one-to-one correspondence with mutually different brake feedback coefficient curves;
obtaining a first brake feedback coefficient according to a brake feedback coefficient curve corresponding to the automatically selected brake feedback gear and the vehicle speed;
obtaining a first brake feedback torque according to the brake torque and the first brake feedback coefficient;
and performing energy feedback according to the first brake feedback torque.
2. The energy feedback method as claimed in claim 1, wherein the feedback of energy according to the first brake feedback torque further comprises:
manually selecting a brake feedback gear from the plurality of brake feedback gears;
obtaining a second brake feedback coefficient according to a brake feedback coefficient curve corresponding to the manually selected brake feedback gear and the vehicle speed;
obtaining a second brake feedback torque according to the brake torque and the second brake feedback coefficient;
and performing energy feedback according to the second brake feedback torque.
3. The energy feedback method according to claim 1 or 2, wherein the brake feedback gears comprise a low feedback brake gear, a medium feedback brake gear and a high feedback brake gear, and a brake feedback coefficient corresponding to the low feedback brake gear is less than or equal to a brake feedback coefficient of the medium feedback brake gear;
when the vehicle brakes when going downhill, the control system selects a high-feedback brake gear;
when the braking deceleration of the vehicle is larger than the braking deceleration threshold value for braking, the control system selects a middle regenerative braking gear;
when the vehicle is in the urban working condition for braking, the control system selects a high-feedback brake gear.
4. An energy feedback system, comprising:
a detection module (310) for detecting whether a current state of a vehicle satisfies a brake feedback condition, wherein the brake feedback condition includes: the temperature of the motor system is smaller than a motor temperature threshold, the charge quantity of the battery system is smaller than a charge quantity threshold, and the temperature of the battery system is larger than a battery temperature threshold;
the vehicle speed information acquisition module (320) is used for acquiring vehicle speed information;
a braking torque information obtaining module (330) for obtaining braking torque information;
a road surface information acquisition module (340) for acquiring road surface condition information;
a brake feedback gear selection module (350) for selecting a brake feedback gear from a plurality of brake feedback gears according to the vehicle speed, the road condition and the brake deceleration when the brake feedback condition is satisfied, wherein the plurality of brake feedback gears correspond to different brake feedback coefficient curves;
the energy feedback module (360) is used for carrying out energy feedback according to the brake feedback torque sent by the control module (370);
the control module (370) is used for obtaining a first brake feedback coefficient according to a brake feedback coefficient curve corresponding to the selected brake feedback gear and the vehicle speed, and further obtaining the brake feedback torque according to the brake torque and the brake feedback coefficient.
5. The energy feedback system of claim 4, wherein the brake feedback gear selection module (350) comprises a plurality of brake feedback gear selection units, the brake feedback gear selection units are arranged in one-to-one correspondence with the brake feedback gears, and the brake feedback gears are selected from the brake feedback gear selection units.
6. The energy feedback system of claim 4, wherein the plurality of brake feedback gears comprises a low feedback brake gear, a medium feedback brake gear and a high feedback brake gear, wherein the brake feedback coefficient corresponding to the low feedback brake gear is less than or equal to the brake feedback coefficient of the medium feedback brake gear and less than or equal to the brake feedback coefficient of the high feedback brake gear at the same vehicle speed, and the brake feedback gear selection module (350) is further configured to:
when the vehicle brakes when going downhill, the control system selects a high-feedback brake gear;
when the braking deceleration of the vehicle is larger than the braking deceleration threshold value for braking, the control system selects a middle regenerative braking gear;
when the vehicle is in the urban working condition for braking, the control system selects a high-feedback brake gear.
7. A vehicle, characterized in that an energy return system according to any one of claims 4-6 is provided.
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| CN108725213B (en) * | 2018-07-23 | 2020-08-28 | 北京车和家信息技术有限公司 | Energy feedback control method and device |
| CN111169472A (en) * | 2018-11-13 | 2020-05-19 | 河南森源重工有限公司 | Vehicle active safety control method and device and vehicle |
| CN109795328A (en) * | 2019-03-04 | 2019-05-24 | 重庆先锋渝州电器有限公司 | The electric hybrid vehicle of oil and its energy back-feed control method with energy feedback function |
| CN110816516B (en) * | 2019-11-06 | 2021-05-18 | 航天重型工程装备有限公司 | Method and device for controlling speed of mine vehicle |
| CN113815423B (en) * | 2021-09-30 | 2023-10-20 | 华人运通(江苏)技术有限公司 | Energy feedback control method and device for electric automobile and vehicle |
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