CN111660821A - Control method and control device for energy recovery of electric automobile - Google Patents

Control method and control device for energy recovery of electric automobile Download PDF

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Publication number
CN111660821A
CN111660821A CN202010472189.XA CN202010472189A CN111660821A CN 111660821 A CN111660821 A CN 111660821A CN 202010472189 A CN202010472189 A CN 202010472189A CN 111660821 A CN111660821 A CN 111660821A
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motor
fed back
low
acquiring
allowed
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CN202010472189.XA
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Chinese (zh)
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李书霞
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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Priority to CN202010472189.XA priority Critical patent/CN111660821A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a control method and a control device for energy recovery of an electric automobile, wherein the control method for energy recovery of the electric automobile comprises the following steps: obtaining the set power allowed to be fed back by the motor; acquiring energy consumption power of a high-voltage accessory; acquiring low-voltage accessory energy consumption power; and acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power. The control method for the energy recovery of the electric automobile can comprehensively consider the feedback capacity of the motor and the compensation of the consumption of the high-voltage accessory and the low-voltage accessory, is favorable for improving the low-temperature feedback torque of the motor, fully utilizes the feedback energy of the motor at low temperature and improves the low-temperature energy recovery rate.

Description

Control method and control device for energy recovery of electric automobile
Technical Field
The invention relates to the technical field of electric automobile manufacturing, in particular to a control method and a control device for electric automobile energy recovery.
Background
The pure electric vehicle motor has large recovery capacity when the whole vehicle slides, brakes or releases the accelerator, allows feedback torque to be large, but the power battery has poor low-temperature activity and smaller allowable charging power, and the target torque during feedback is limited by the feedback capacity of the battery, so that the target torque of the motor during power generation is small, the ratio of the electric quantity of energy recovered into the battery in a low-temperature environment to the normal temperature is small, and an improved space exists.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling energy recovery of an electric vehicle, which can improve a low-temperature feedback torque of a motor, and is beneficial to fully utilize the feedback energy of the motor at low temperature, thereby improving the low-temperature energy recovery rate.
The control method for energy recovery of the electric automobile comprises the following steps: obtaining the set power allowed to be fed back by the motor; acquiring energy consumption power of a high-voltage accessory; acquiring low-voltage accessory energy consumption power; and acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power.
According to the control method for the energy recovery of the electric automobile, the feedback capacity of the motor and the compensation of the consumption of the high-voltage accessories and the low-voltage accessories can be comprehensively considered, the torque fed back by the motor at low temperature is improved, the feedback energy of the motor at low temperature is fully utilized, and the recovery rate of the low-temperature energy is improved.
According to some embodiments of the invention, the obtaining of the actual torque allowed to be fed back by the motor comprises: obtaining the conversion efficiency of the high-voltage accessory; obtaining the conversion efficiency of the low-pressure accessory; and acquiring the actual torque allowed to be fed back by the motor according to the conversion efficiency of the high-voltage accessory and the conversion efficiency of the low-voltage accessory.
According to some embodiments of the invention, the obtaining of the actual torque allowed to be fed back by the motor comprises: and acquiring the actual torque allowed to be fed back by the motor according to the product of the conversion efficiency of the high-voltage accessory and the energy consumption power of the high-voltage accessory and the product of the conversion efficiency of the low-voltage accessory and the energy consumption power of the low-voltage accessory.
According to some embodiments of the invention, the obtaining of the actual torque allowed to be fed back by the motor comprises: and acquiring the actual torque allowed to be fed back by the motor according to the sum of the product of the conversion efficiency of the high-voltage accessory and the energy consumption power of the high-voltage accessory, the product of the conversion efficiency of the low-voltage accessory and the energy consumption power of the low-voltage accessory and the set power allowed to be fed back by the motor.
According to some embodiments of the invention, the control method for energy recovery of the electric vehicle further comprises: and acquiring the actual feedback energy of the motor according to the actual torque allowed to be fed back by the motor.
According to some embodiments of the present invention, the method for controlling energy recovery of an electric vehicle, the obtaining actual feedback energy of the motor includes: acquiring the battery charge-discharge efficiency of the motor; acquiring the power generation efficiency of the motor; acquiring the rotating speed of the motor; and acquiring the actual feedback energy of the motor according to the battery charge-discharge efficiency, the power generation efficiency, the rotating speed and the actual torque allowed to be fed back by the motor.
According to the control method for energy recovery of the electric vehicle in some embodiments of the invention, the battery charge-discharge efficiency, the power generation efficiency, the rotation speed, and the actual torque allowed to be fed back by the motor are all positively correlated with the actual feedback energy of the motor.
According to the control method for energy recovery of the electric vehicle in some embodiments of the invention, the actual feedback energy of the motor is obtained according to the product of the battery charge-discharge efficiency, the power generation efficiency, the rotation speed and the actual torque allowed to be fed back by the motor.
The invention also provides a control device for energy recovery of the electric automobile.
According to the control device for energy recovery of the electric automobile, the control device comprises: the acquisition module is used for acquiring the set power allowed to be fed back by the motor, acquiring the energy consumption power of the high-voltage accessory and acquiring the energy consumption power of the low-voltage accessory; and the control module is electrically connected with the acquisition module and is used for acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power.
According to the control device for energy recovery of the electric automobile, the acquisition module is further used for acquiring the battery charge-discharge efficiency of the motor, acquiring the power generation efficiency of the motor and acquiring the rotating speed of the motor; the control module is further used for obtaining actual feedback energy of the motor according to the battery charge-discharge efficiency of the motor, the power generation efficiency of the motor, the rotating speed of the motor and the actual torque allowed to be fed back by the motor.
Compared with the prior art, the control device and the control method for energy recovery of the electric automobile have the same advantages, and are not described again.
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 flowchart of a control method of energy recovery of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a relationship between a feedback torque of the motor and a rotation speed of the motor involved in the control method of energy recovery of the electric vehicle according to the 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.
The following describes a control method for energy recovery of an electric vehicle according to an embodiment of the present invention with reference to fig. 1, and the control method can comprehensively consider feedback capacity of a motor and compensation of consumption of high-voltage accessories and low-voltage accessories when controlling feedback energy of the motor, so as to improve low-temperature feedback torque of the motor, fully utilize feedback energy of the motor at low temperature, and improve low-temperature energy recovery rate.
As shown in fig. 1, the control method for energy recovery of an electric vehicle according to an embodiment of the present invention includes:
s10, obtaining the set power (Pbat) allowed to be fed back by the motor; s20, acquiring high-voltage accessory energy consumption power (Ppptc _ eas); s30, acquiring low-voltage accessory energy consumption power (Pdcdc); and S40, acquiring the actual torque (T) allowed to be fed back by the motor according to the set power (Pbat) allowed to be fed back by the motor, the high-voltage accessory consumed power (Ppptc _ eas) and the low-voltage accessory consumed power (Pdcdc).
It should be noted that, in the present invention, S10, S20, and S30 may be performed simultaneously or sequentially, that is, the set power allowed to be fed back by the motor, the power consumed by the high-voltage accessory, and the power consumed by the low-voltage accessory may be obtained simultaneously or sequentially, and the set power allowed to be fed back by the motor, the power consumed by the high-voltage accessory, and the power consumed by the low-voltage accessory are not affected by each other.
That is to say, the actual torque allowed to be fed back to the motor by using the control method of the present invention is not only based on the reference of the set power allowed to be fed back to the motor, but also considers the power consumption of the high-voltage accessories and the power consumption of the low-voltage accessories, that is, not only the power consumption of the entire vehicle power system (Emotor) but also the power consumption of other high-voltage accessories (Eptc _ eas) and the power consumption of the low-voltage accessories (Edcdc), wherein the actual total consumption of the entire vehicle E1 is the sum of the power consumption of the entire vehicle power system (Emotor), the power consumption of other high-voltage accessories (Eptc _ eas) and the power consumption of the low-voltage accessories (Edcdc), that is, E1 ═ Emotor + Eptc _ eas + Edcdc, and the total vehicle recovery energy E2 is the product of the total driving power consumption E1 and the energy recovery rate η 1 of the entire vehicle, that is, η 1 ═ E2/E1, wherein E2 isRecoveringdt。
It can be understood that, in the conventional motor energy feedback control method, only the influence of the energy consumption (Emotor) of the power system of the whole vehicle on the feedback energy of the motor is considered, so that in a low-temperature environment, especially in an outdoor driving working condition in winter, the low-temperature activity of the power battery is poor, the allowable charging power is low, the energy consumption (Eptc _ eas) of other high-voltage accessories and the energy consumption (Edcdc) of low-voltage accessories are high, the occupation ratio is high, the target torque in feedback is limited by the feedback capacity of the battery, the target torque in power generation of the motor is small, and even the electric quantity of the energy recovered into the battery in the low-temperature environment is much less than the normal temperature ratio, so that the capacity of the motor generator cannot be fully utilized.
The inventor of the present invention is aware of the defects of the practical problem, so that the control method is optimized when designing the present solution, that is, not only the energy consumption (Emotor) of the power system of the whole vehicle is considered, but also the energy consumption (Eptc — eas) of other high-voltage accessories and the energy consumption (Edcdc) of low-voltage accessories are considered, so as to obtain the energy consumption power of the high-voltage accessories and the energy consumption power of the low-voltage accessories, and the obtained energy consumption power of the low-voltage accessories and the set power allowed to be fed back by the motor are used together as the control factor for controlling the feedback energy of the motor, thereby ensuring that the torque fed back by the motor at the low temperature is increased in the low-temperature environment, and fully utilizing.
According to the control method for the energy recovery of the electric automobile, the feedback capacity of the motor and the compensation of the consumption of the high-voltage accessories and the low-voltage accessories can be comprehensively considered, the torque fed back by the motor at low temperature is improved, the feedback energy of the motor at low temperature is fully utilized, and the recovery rate of the low-temperature energy is improved.
In some embodiments, obtaining the actual torque the motor is allowed to back comprises: obtaining the conversion efficiency eta 2 of the high-voltage accessory; obtaining the conversion efficiency eta 3 of the low-pressure accessory; and acquiring the actual torque allowed to be fed back by the motor according to the conversion efficiency eta 2 of the high-voltage accessory and the conversion efficiency eta 3 of the low-voltage accessory.
That is to say, when the actual torque allowed to be fed back by the motor is obtained, the obtained actual torque allowed to be fed back by the motor is larger and more conforms to the actual motor operation requirement by indirectly reflecting the conversion efficiency η 2 of the high-voltage accessory energy consumption (Eptc _ eas) and the conversion efficiency η 3 of the low-voltage accessory energy consumption (Edcdc), so that the torque fed back by the motor at low temperature can be more reliably improved.
Wherein, obtaining the actual torque allowed to be fed back by the motor comprises the following steps: and obtaining the actual torque allowed to be fed back by the motor according to the product of the conversion efficiency eta 2 of the high-voltage accessory and the energy consumption power of the high-voltage accessory and the product of the conversion efficiency of the low-voltage accessory and the energy consumption power of the low-voltage accessory.
That is, when the actual torque allowed to be fed back by the motor is obtained, the conversion efficiency η 2 of the high-voltage accessories, which indirectly reflects the energy consumption (Eptc _ eas) of the high-voltage accessories, is multiplied by the energy consumption power (Pptc _ eas) of the high-voltage accessories, and the conversion efficiency η 3 of the low-voltage accessories, which indirectly reflects the energy consumption (Edcdc) of the low-voltage accessories, is multiplied by the energy consumption power (pdcc) of the low-voltage accessories, so as to be used together as a reference for obtaining the actual torque allowed to be fed back by the motor.
Further, obtaining the actual torque allowed to be fed back by the motor comprises: and acquiring the actual torque (T) allowed to be fed back by the motor according to the product of the conversion efficiency eta 2 of the high-voltage accessory and the energy consumption power (Pptc _ eas) of the high-voltage accessory, the product of the conversion efficiency eta 3 of the low-voltage accessory and the energy consumption power (pdcc) of the low-voltage accessory and the sum of the set power (Pbat) allowed to be fed back by the motor. Namely, the conversion efficiency eta 2 of the high-voltage accessories, the consumed power (Ppptc _ eas) of the high-voltage accessories, the conversion efficiency eta 3 of the low-voltage accessories, the consumed power (pdcc) of the low-voltage accessories and the set power (Pbat) allowed to be fed back by the motor are positively correlated with the actual torque (T) allowed to be fed back by the motor. In a specific implementation, (T) ═ 9550 (Pbat + pdccc η 3+ Pptc — eas η 2)/n, where n is the rotational speed of the motor. Therefore, the actual value of Pbat under low-temperature environment is less influenced by temperature, and the influence generated by consumption of low-voltage accessories and high-voltage accessories can be compensated by acquiring Pcdc and Pptc _ eas, so that the motor feedback torque under low-temperature environment is improved, the motor feedback energy under low temperature is fully utilized, and the low-temperature energy recovery rate is improved.
Therefore, the motor feedback capacity and the compensation of the consumption of the high-voltage accessories and the low-voltage accessories are comprehensively considered by acquiring the parameters of the influence factors, so that the torque fed back by the motor at low temperature is improved, the motor feedback energy at low temperature is fully utilized, and the low-temperature energy recovery rate is improved.
In some embodiments, the control method for energy recovery of an electric vehicle of the present invention further includes: s50, obtaining the actual feedback energy (P) of the motor according to the actual torque (T) allowed to be fed back by the motorRecovering). That is to say, when the actual torque (T) allowed to be fed back by the motor is obtained, the motor operates according to the actual torque (T) allowed to be fed back by the motor, so that the work done when the whole vehicle slides, brakes or releases the accelerator is converted into electric energy, the energy recovery is realized, and the low-temperature energy recovery rate is improved.
In some embodiments, obtaining actual feedback energy for the motor comprises:obtaining battery charge-discharge efficiency of the motor, obtaining power generation efficiency of the motor, obtaining rotational speed of the motor, and obtaining the battery charge-discharge efficiency (η)bat) Obtaining the actual feedback energy (P) of the motor by the actual feedback energy (P) of the motor according to the generation efficiency (η motor), the rotating speed (n) and the actual torque (T) allowed to be fed back by the motorRecovering)。
It is understood that the influence factor of the actual feedback energy of the motor includes the battery charge-discharge efficiency (η)bat) The motor comprises a power generation efficiency (η motor), a rotating speed (n) and an actual torque (T) allowed to be fed back by the motor, wherein the power generation efficiency (η motor) of different motors is different, and the battery charge and discharge efficiency (η) of different power batteries is differentbat) In contrast, the actual feedback energy of the motor is directly influenced by the rotating speed of the motor, therefore, the invention obtains the charging and discharging efficiency of the battery (η)bat) The generating efficiency (η motor), the rotating speed (n) and the actual torque (T) allowed to be fed back by the motor are taken as the actual feedback energy (P) of the motorRecovering) The method is favorable for more accurately and reliably acquiring the actual feedback energy of the motor.
Wherein, the battery charge-discharge efficiency (η)bat) The generating efficiency (η motor), the rotating speed (n) and the actual torque (T) allowed to be fed back by the motor are all equal to the actual feedback energy (P) of the motorRecovering) That is, the efficiency of charge and discharge with the battery (η)bat) An increase in the generation efficiency (η motor), the rotation speed (n) or the actual torque (T) allowed to be fed back by the motor, and the actual feedback energy (P) of the motorRecovering) And also gradually increases.
That is to say, in a low-temperature environment, the control method of the invention obtains the actual torque (T) allowed to be fed back by the motor which is positively correlated with the high-voltage accessory energy consumption power (Pptc _ eas) and the low-voltage accessory energy consumption power (Pdcdc), so that the feedback energy actually achieved by the motor of the electric automobile in the low-temperature environment in winter is the energy consumption of the high-voltage accessory and the energy consumption of the low-voltage accessory which are comprehensively considered, the torque fed back by the motor at the low temperature is favorably improved, the feedback energy of the motor at the low temperature is fully utilized, and the recovery rate of the low-temperature energy is improved.
In some embodiments, the battery is charged and discharged according to a battery charge-discharge efficiency (η)bat) Power generation efficiency (η motor), and rotational speedThe product of the rotating speed (n) and the actual torque (T) allowed to be fed back by the motor obtains the actual feedback energy (P) of the motorRecovering). I.e. PRecovering＝T*n/9550*ηmotor*ηbatThus, after each relevant parameter is obtained, the actual feedback energy (P) of the motor can be obtained through the calculation modeRecovering). Wherein, as shown in fig. 2, the relationship between the feedback torque of the motor and the rotation speed of the motor is shown in fig. 2, and n0 is the feedback cut-in rotation speed; t0 is the depth feedback target torque.
It should be noted that the magnitude of the actual torque (T) of the motor of the present invention is a key factor affecting the energy recovery rate, where T ═ min { Tmotor, Tbat, Tbrake }, Tbat is the capability of allowing feedback in consideration of charging, Tmotor is limited by the power generation capability of the motor, and Tbrake is the torque limit in consideration of the braking force distribution. Therefore, at low temperature, the allowed feedback power Pbat of the motor is small, and the limiting factor of T0 is mainly the feedback power of the battery. Therefore, on the basis that the feedback torque is calculated and the allowed feedback power of the battery is considered, the low-voltage accessory and the high-voltage accessory are added to consume power currently, the low-temperature feedback torque of the motor is improved, the feedback energy of the motor at low temperature is fully utilized, and the low-temperature energy recovery rate is improved.
The invention also provides a control device for energy recovery of the electric automobile.
According to the control device for energy recovery of the electric automobile, the control device comprises: the device comprises an acquisition module and a control module. The acquisition module is used for acquiring the set power allowed to be fed back by the motor, acquiring the energy consumption power of the high-voltage accessory and acquiring the energy consumption power of the low-voltage accessory; and the control module is electrically connected with the acquisition module and is used for acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power.
That is, in the process of acquiring the actual torque allowed to be fed back by the motor, the acquisition of the parameters related to the conversion efficiency η 2 of the high-voltage accessory, the power consumption power (Pptc — eas) of the high-voltage accessory, the conversion efficiency η 3 of the low-voltage accessory, the power consumption power (Pdcdc) of the low-voltage accessory and the set power (Pbat) allowed to be fed back by the motor is realized by the acquisition module, and the acquisition module can output the acquired parameters to the control module. An algorithm of (T) ═ 9550 (Pbat + pdccc η 3+ Pptc _ eas · η 2)/n (n is the rotation speed of the motor) may be preset in the control module, so that the control module calculates the actual torque allowed to be fed back by the motor through the acquired parameters by the algorithm.
In some embodiments, the obtaining module is further configured to obtain battery charging and discharging efficiency of the motor, obtain power generation efficiency of the motor, and obtain a rotation speed of the motor; the control module is also used for acquiring the actual feedback energy of the motor according to the battery charge-discharge efficiency of the motor, the power generation efficiency of the motor, the rotating speed of the motor and the actual torque allowed to be fed back by the motor.
That is, in the process of acquiring the actual feedback energy of the motor, the battery charge-discharge efficiency is realized by the acquisition module (η)bat) Acquisition of parameters related to power generation efficiency (η motor) and rotating speed (n), and the acquisition module can output the acquired parameters to the control module, wherein P can be preset in the control moduleRecovering＝T*n/9550*ηmotor*ηbatSo that the control module calculates the actual feedback energy of the motor through the algorithm according to the acquired parameters and the calculated actual torque allowed to be fed back by the motor.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 (10)

1. A control method for energy recovery of an electric vehicle is characterized by comprising the following steps:
obtaining the set power allowed to be fed back by the motor;
acquiring energy consumption power of a high-voltage accessory;
acquiring low-voltage accessory energy consumption power;
and acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power.
2. The control method according to claim 1, wherein the obtaining of the actual torque allowed to be fed back by the motor comprises:
obtaining the conversion efficiency of the high-voltage accessory;
obtaining the conversion efficiency of the low-pressure accessory;
and acquiring the actual torque allowed to be fed back by the motor according to the conversion efficiency of the high-voltage accessory and the conversion efficiency of the low-voltage accessory.
3. The control method according to claim 2, wherein the obtaining of the actual torque allowed to be fed back by the motor comprises:
and acquiring the actual torque allowed to be fed back by the motor according to the product of the conversion efficiency of the high-voltage accessory and the energy consumption power of the high-voltage accessory and the product of the conversion efficiency of the low-voltage accessory and the energy consumption power of the low-voltage accessory.
4. The control method according to claim 3, wherein the obtaining of the actual torque allowed to be fed back by the motor comprises:
and acquiring the actual torque allowed to be fed back by the motor according to the sum of the product of the conversion efficiency of the high-voltage accessory and the energy consumption power of the high-voltage accessory, the product of the conversion efficiency of the low-voltage accessory and the energy consumption power of the low-voltage accessory and the set power allowed to be fed back by the motor.
5. The control method according to claim 1, characterized by further comprising:
and acquiring the actual feedback energy of the motor according to the actual torque allowed to be fed back by the motor.
6. The control method of claim 5, wherein the obtaining actual feedback energy of the motor comprises:
acquiring the battery charge-discharge efficiency of the motor;
acquiring the power generation efficiency of the motor;
acquiring the rotating speed of the motor;
and acquiring the actual feedback energy of the motor according to the battery charge-discharge efficiency, the power generation efficiency, the rotating speed and the actual torque allowed to be fed back by the motor.
7. The control method according to claim 6, wherein the battery charge-discharge efficiency, the power generation efficiency, the rotation speed, and the actual torque allowed to be fed back by the motor are all positively correlated with the actual feedback energy of the motor.
8. The control method according to claim 7, wherein the actual feedback energy of the motor is obtained from a product of the battery charge-discharge efficiency, the power generation efficiency, the rotation speed, and an actual torque that the motor is allowed to feedback.
9. A control device for energy recovery of an electric vehicle, characterized by comprising:
the acquisition module is used for acquiring the set power allowed to be fed back by the motor, acquiring the energy consumption power of the high-voltage accessory and acquiring the energy consumption power of the low-voltage accessory;
and the control module is electrically connected with the acquisition module and is used for acquiring the actual torque allowed to be fed back by the motor according to the set power allowed to be fed back by the motor, the high-voltage accessory energy consumption power and the low-voltage accessory energy consumption power.
10. The control device according to claim 9,
the acquisition module is also used for acquiring the battery charge-discharge efficiency of the motor, acquiring the power generation efficiency of the motor and acquiring the rotating speed of the motor;
the control module is further used for obtaining actual feedback energy of the motor according to the battery charge-discharge efficiency of the motor, the power generation efficiency of the motor, the rotating speed of the motor and the actual torque allowed to be fed back by the motor.
CN202010472189.XA 2020-05-29 2020-05-29 Control method and control device for energy recovery of electric automobile Pending CN111660821A (en)

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Application Number Priority Date Filing Date Title
CN202010472189.XA CN111660821A (en) 2020-05-29 2020-05-29 Control method and control device for energy recovery of electric automobile

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Application Number Priority Date Filing Date Title
CN202010472189.XA CN111660821A (en) 2020-05-29 2020-05-29 Control method and control device for energy recovery of electric automobile

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CN111660821A true CN111660821A (en) 2020-09-15

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CN112549976A (en) * 2020-12-29 2021-03-26 摩登汽车(盐城)有限公司 Energy recovery control method and system for electric automobile
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Application publication date: 20200915