WO2018119914A1 - Brake energy feedback method and feedback system for electric vehicle, and vehicle - Google Patents

Abstract

A brake energy feedback method for an electric vehicle, the feedback method comprising: detecting whether a power battery of an electric vehicle meets a brake energy receiving condition; if so, then feeding brake energy generated by a driving motor of the electric vehicle back to the power battery; and if not, then feeding the brake energy back to a powered apparatus of the electric vehicle. The brake energy feedback method of the present invention prevents damage to a power system, and prevents brake disc damage caused by mechanical braking, thus improving driving safety. Also disclosed are a brake energy feedback system for an electric vehicle and vehicle.

Description

Brake energy feedback method, feedback system and vehicle for electric vehicle

[Technical Field]

The present invention relates to the field of electric vehicles, and in particular to a braking energy feedback method, a feedback system and a vehicle for an electric vehicle.

 【Background technique】

In the braking condition of a car running on a long downhill slope, braking is required to maintain the vehicle speed in a reasonable range. For conventional vehicles, the engine braking is usually used to achieve the braking effect; for electric vehicles, the braking energy feedback is usually used to simulate the engine braking.

The power component in an electric vehicle is a drive motor that can operate as an electric motor or generator. When the electric vehicle is braked, the driving motor can be used as the working characteristic of the generator, and part of the kinetic energy of the electric vehicle can be recovered to realize the braking energy feedback function of the electric vehicle, thereby realizing the simulation of the engine system by using the braking energy feedback. move. However, the energy stored in the power battery is limited. If the braking energy is forcibly stored, the power battery of the electric vehicle is easily damaged; if it is not stored, the use of the mechanical brake may cause damage to the brake disk and reduce the safety of driving.

 [Summary of the Invention]

The invention provides a braking energy feedback method, a feedback system and a vehicle for an electric vehicle, so as to solve the problem that the braking energy feedback function in the electric vehicle of the prior art easily causes damage to the power system or damage of the brake disc.

In order to solve the above technical problem, the present invention provides a braking energy feedback method for an electric vehicle, which includes detecting whether a power battery of the electric vehicle satisfies a braking energy receiving condition; if the braking energy receiving condition is satisfied, driving the electric vehicle The braking energy generated by the motor is fed back to the power battery; if the braking energy receiving condition is not met, the braking energy is fed back to the electric device of the electric vehicle.

Wherein, before the step of detecting whether the power battery of the electric vehicle meets the braking energy receiving condition, further comprising: detecting whether the opening degree of the accelerator pedal of the electric vehicle is less than or equal to a preset first opening threshold, or detecting the braking of the electric vehicle Whether the opening degree of the pedal is greater than or equal to a preset second opening degree threshold; if the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold or the opening degree of the brake pedal is greater than or equal to the second opening degree threshold, further detecting the electric motor Whether the vehicle speed of the vehicle is greater than or equal to a preset speed threshold; if the vehicle speed of the electric vehicle is greater than or equal to the speed threshold, the braking energy feedback system of the electric vehicle is started, and detecting whether the power battery of the electric vehicle meets the braking energy receiving condition A step of.

The step of detecting whether the power battery meets the braking energy receiving condition comprises: detecting whether the power of the power battery is less than or equal to a preset power threshold; and if the power of the power battery is less than or equal to the power threshold, satisfying the braking energy receiving condition; If the power of the power battery is greater than the power threshold, the braking energy receiving condition is not satisfied.

The step of providing the braking energy to the powered device includes: adjusting the power of the powered device according to the power of the braking energy, wherein the greater the power of the braking energy, the greater the power of the adjusted powered device.

Wherein, the step of adjusting the power of the electrical device according to the power of the braking energy comprises: adjusting the power of the powered device to a power equal to or greater than the braking energy.

Wherein, the electric device is an air conditioning system, and the step of adjusting the power of the electric device according to the power of the braking energy comprises: detecting whether the air conditioning system is activated; if the air conditioning system is not activated, controlling the fan of the air conditioning system to remain closed, and Turn on the cooling or heating components of the air conditioning system.

Wherein, the electric equipment is an air conditioning system, and the step of adjusting the power of the electric equipment according to the power of the braking energy comprises: if the air conditioning system has been activated, detecting whether the air conditioning system is in a cooling state or a heating state; if in the cooling state, starting The heating component of the air conditioning system and the power of the cooling component of the air conditioning system; if it is in the heating state, the refrigeration component of the air conditioning system is activated, and the power of the heating component of the air conditioning system is raised, thereby satisfying the user set temperature requirement In the case of using the air conditioning system to consume braking energy.

In order to solve the above technical problem, the present invention also provides a braking energy feedback system for an electric vehicle, characterized in that the system comprises a first sensor, a controller and a feedback switching system, and the first sensor is used for detecting the power battery of the electric vehicle. The controller determines whether the power battery meets the braking energy receiving condition according to the power of the power battery. If the braking energy receiving condition is met, the control feedback switching system returns the braking energy generated by the driving motor of the electric vehicle to the power battery. If the braking energy receiving condition is not satisfied, the control feedback switching system feeds back the braking energy to the electric device of the electric vehicle.

Wherein, the system further includes a second sensor for detecting an opening degree of the accelerator pedal of the electric vehicle or an opening degree of the brake pedal of the electric vehicle, and a third sensor for detecting the vehicle speed of the electric vehicle; Determining whether the opening degree of the accelerator pedal of the electric vehicle is less than or equal to a preset first opening threshold, or determining whether the opening degree of the brake pedal of the electric vehicle is greater than or equal to a preset second opening threshold; if the accelerator pedal If the opening degree is less than or equal to the first opening degree threshold or the opening degree of the brake pedal is greater than or equal to the second opening degree threshold, the controller further determines whether the vehicle speed of the electric vehicle is greater than or equal to a preset speed threshold; if the vehicle speed of the electric vehicle is greater than Or equal to the speed threshold, the braking energy feedback function of the electric vehicle is started, and whether the power battery meets the braking energy receiving condition is determined according to the power of the power battery.

The controller determines whether the power of the power battery is less than or equal to a preset power threshold; if the power of the power battery is less than or equal to the power threshold, determining that the braking energy receiving condition is satisfied; if the power of the power battery is greater than the power threshold, then Meet the braking energy receiving conditions.

Wherein, when the braking energy is fed back to the electric device of the electric vehicle, the controller adjusts the power of the electric device according to the power of the braking energy, wherein the power of the braking energy is larger, and the adjusted electric device is used. The greater the power.

Wherein, the controller adjusts the power of the powered device to a power equal to or greater than the braking energy.

Wherein, the electric equipment is an air conditioning system, and when the air conditioning system is not activated, the controller controls the fan of the air conditioning system to remain closed, and turns on the cooling component or the heating component of the air conditioning system.

Wherein, when the air conditioning system is in a cooling state, the controller activates the heating component of the air conditioning system and increases the power of the cooling component of the air conditioning system; when the air conditioning system is in the heating state, the controller activates the cooling component of the air conditioning system, The power of the heating element of the air conditioning system is increased, and the braking energy is consumed by the air conditioning system when the set temperature requirement is met.

In order to solve the above technical problem, the present invention further provides a vehicle including a vehicle body, a drive motor, a power battery, a power consumption device, and a brake energy feedback system, wherein the brake energy feedback system includes a first sensor, a controller, and a feedback switch The first sensor is used to detect the power of the power battery, and the controller determines whether the power battery meets the braking energy receiving condition according to the power battery level. If the braking energy receiving condition is met, the control feedback switching system will drive the braking generated by the motor. The energy is fed back to the power battery. If the braking energy receiving condition is not met, the control feedback switching system feeds back the braking energy to the powered device.

Wherein, the braking energy feedback system further comprises a second sensor for detecting an opening degree of the accelerator pedal of the vehicle or an opening degree of the brake pedal of the vehicle, and a third sensor for detecting the vehicle speed of the vehicle; The controller determines whether the opening degree of the accelerator pedal of the vehicle is less than or equal to a preset first opening threshold, or determines whether the opening degree of the brake pedal of the vehicle is greater than or equal to a preset second opening threshold; if the accelerator pedal is opened If the degree is less than or equal to the first opening threshold or the opening of the brake pedal is greater than or equal to the second opening threshold, the controller further determines whether the vehicle speed of the vehicle is greater than or equal to a preset speed threshold; if the vehicle speed is greater than or equal to the speed The threshold value starts the braking energy feedback function of the vehicle, and determines whether the power battery satisfies the braking energy receiving condition according to the power quantity of the power battery.

The controller determines whether the power of the power battery is less than or equal to a preset power threshold; if the power of the power battery is less than or equal to the power threshold, determining that the braking energy receiving condition is satisfied; if the power of the power battery is greater than the power threshold, then Meet the braking energy receiving conditions.

Wherein, when the braking energy is fed back to the electric device of the electric vehicle, the controller adjusts the power of the electric device according to the power of the braking energy, wherein the power of the braking energy is larger, and the adjusted electric device is used. The greater the power.

Wherein, the controller adjusts the power of the powered device to a power equal to or greater than the braking energy.

Wherein, the electric equipment is an air conditioning system, when the air conditioning system is not activated, the controller controls the fan of the air conditioning system to remain closed, and turns on the cooling component or the heating component of the air conditioning system, when the air conditioning system is in a cooling state, The controller activates the heating component of the air conditioning system and increases the power of the refrigeration component of the air conditioning system; when the air conditioning system is in the heating state, the controller activates the cooling component of the air conditioning system and increases the power of the heating component of the air conditioning system. Furthermore, the braking energy is consumed by the air conditioning system when the user set temperature requirement is met.

In the braking energy feedback method of the electric vehicle of the present invention, firstly, it is detected whether the power battery of the electric vehicle meets the braking energy receiving condition, and the detecting step can understand the energy storage space of the power battery to prevent the power battery from forcibly receiving the braking energy. The electric vehicle power system is damaged. If it is detected that the power battery satisfies the braking energy receiving condition, the braking energy generated by the driving electrode of the electric vehicle is fed back to the power battery. If it is not satisfied, the braking energy is fed back to the electric equipment of the electric vehicle, that is, when the power battery cannot realize the braking energy feedback, the braking energy can be consumed by the electric equipment, so as to avoid the electric vehicle passing the mechanical braking manner. Brake disc damage caused by braking. Therefore, according to the feedback method of the braking energy in the present invention, when the power battery cannot receive the braking energy, the electric vehicle can dissipate the braking energy through the electric device to realize the braking energy feedback function without using the mechanical brake. Improve the safety of driving.

 [Description of the Drawings]

1 is a schematic flow chart of an embodiment of a braking energy feedback method for an electric vehicle according to the present invention;

2 is a schematic flow chart of adjusting power of an air conditioning system in an embodiment of the braking energy feedback method shown in FIG. 1;

3 is a schematic structural view of an embodiment of a braking energy feedback system for an electric vehicle according to the present invention;

4 is a schematic structural view of an embodiment of a vehicle according to the present invention;

FIG. 5 is a schematic structural view of an air conditioning system in an embodiment of the vehicle shown in FIG. 4. FIG.

【detailed description】

The technical solutions of the present invention are clearly and completely described in the following with reference to the embodiments of the present invention and the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The electric vehicle is in a braking condition when driving downhill, and it is necessary to turn on the braking energy feedback function to achieve braking. When the electric vehicle performs braking energy feedback, it detects whether the power battery of the electric vehicle meets the braking energy receiving condition, and if the receiving condition is satisfied, the braking energy generated by the driving motor of the electric vehicle is fed back to the power battery; if the receiving is not satisfied Condition, the braking energy is fed back to the air conditioning system of the electric vehicle.

For the process of the above-mentioned electric vehicle braking condition during long downhill driving, please refer to FIG. 1 for specific steps. FIG. 1 is a schematic flow chart of an embodiment of a braking energy feedback method for an electric vehicle according to the present invention. The braking energy feedback method of the present embodiment includes the following steps.

S11: Detect the opening degree of the accelerator pedal or the brake pedal.

S12: Detecting the speed of the electric vehicle.

In the present embodiment, whether or not to activate the braking energy feedback function of the electric vehicle is determined based on the opening degree of the accelerator pedal or the brake pedal and the vehicle speed, that is, the above two steps S11 and S12 are used to determine whether or not to activate the braking energy feedback function. Specifically, when it is detected in step S11 that the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold or the opening degree of the brake pedal is greater than or equal to the second opening degree threshold, step S12 is performed to detect whether the vehicle speed of the electric vehicle is greater than or equal to Or equal to the preset speed threshold. If it is greater than or equal to the speed threshold, the braking energy feedback system is started, and step S13 is performed; if it is less than the speed threshold, it is considered that braking energy feedback is not needed.

S13: Start the braking energy feedback function, and detect whether the power battery of the electric vehicle meets the braking energy receiving condition.

When braking energy feedback is performed, it is first detected whether the power battery of the electric vehicle satisfies the braking energy receiving condition, that is, whether the power battery has sufficient power storage space. Generally, in this step S13, it is detected whether the power of the power battery is less than or equal to a preset power threshold. If the power of the power battery is less than or equal to the power threshold, the power battery is also considered to store a certain amount of power, that is, the brake is satisfied. Energy receiving conditions.

When it is determined in this step S13 that the power battery satisfies the braking energy receiving condition, step S14 is performed; and when it is determined that the power battery does not satisfy the braking energy receiving condition, step S15 is performed.

S14: The braking energy generated by the driving motor of the electric vehicle is fed back to the power battery.

If the power battery satisfies the braking energy receiving condition, the braking energy generated by the electric vehicle driving motor is fed back to the power battery, and the power battery stores the excess energy.

S15: The braking energy generated by the driving motor of the electric vehicle is fed back to the electric equipment of the electric vehicle.

If the power battery does not satisfy the braking energy receiving condition, the braking energy generated by the driving motor of the electric vehicle is fed back to the electric device of the electric vehicle, and the excess energy is consumed by the electric device.

Specifically, in the step S15, the feedback mode is: the power of the electric device is adjusted according to the power of the braking energy, and the power of the electric device after the adjustment is larger as the power of the braking energy is larger. Generally, the power of the air conditioning system is adjusted to be equal to or greater than the power of the braking energy.

The electric power equipment selects the high-power electric equipment with adjustable power in the electric vehicle, generally is an air-conditioning system. For the adjustment method of the air-conditioning system, please refer to FIG. 2, FIG. 2 is an embodiment of the braking energy feedback method shown in FIG. A schematic diagram of the process of adjusting the power of the air conditioning system. The adjustment of the air conditioning system includes the following steps.

S151: Detect whether the air conditioning system is started.

If the air conditioning system is not activated, that is, it is not necessary to adjust the temperature at this time, the process proceeds to step S152. If the air conditioning system is turned on, it proceeds to step S153.

S152: The fan controlling the air conditioning system is kept closed, and the cooling component or the heating component of the air conditioning system is turned on.

The step S152 corresponds to the case where the air conditioning system is not turned on. Since the temperature is not required to be adjusted at this time, the fan controlling the air conditioning system remains in the off state, and the cold air or hot air generated by the air conditioning system is not blown into the cab by the fan. And cause temperature changes. Since the air conditioning system needs to consume the braking energy, in this step S152, it is necessary to turn on the cooling component or the heating component of the air conditioning system, and adjust the power of the cooling component or the heating component to be equal to or greater than the power of the braking energy.

S153: Detect whether the air conditioning system is in a cooling state or a heating state.

After detecting that the air conditioning system is turned on, it is further determined whether the air conditioning system is in a cooling state or a heating state. If the air conditioning system is in the cooling state, step S154 is performed; if the air conditioning system is in the heating state, step S155 is performed.

S154: Start heating components of the air conditioning system and increase the power of the cooling components of the air conditioning system.

The step S154 corresponds to the case where the air conditioning system is in a cooling state. At this time, the heating component of the air conditioning system is turned on, and the power of the cooling component is increased, so that the influence of the power of the cooling component on the temperature and the influence of the heating component on the temperature can be They cancel each other out and consume the braking energy by using the heating and cooling components that are turned on. The braking energy is consumed by the air conditioning system while satisfying the user set temperature requirements.

S155: Start the cooling component of the air conditioning system and increase the power of the heating component of the air conditioning system.

The step S155 corresponds to the case where the air conditioning system is in the heating state, and the same principle as in the step S154 is performed, the refrigeration component of the air conditioning system is turned on, and the power of the heating component is raised, so that the power boosting portion of the heating component affects the temperature and The effects of the cooling components on the temperature can cancel each other out and consume the braking energy by means of the open heating and cooling components. It is realized that the braking energy is consumed by the air conditioning system while satisfying the user set temperature requirement.

The above steps S152, S154, and S155 satisfy the user's requirement for the temperature in the cab, and also utilize the braking energy consumed by the air conditioning system, thereby realizing the power consumption of the braking energy generated by the driving electrode to the electric vehicle described in step S15. device.

The braking energy feedback method of the present embodiment enables the electric vehicle to realize the braking energy feedback function by the power battery storage or the air conditioning system dissipating in the braking condition during long downhill driving to meet the long downhill driving time. Braking demand, specifically when the power battery is high, the braking energy does not need to enter the power battery, and does not need to use mechanical braking, but is dissipated by the electric equipment to realize the braking energy feedback function, so that the electric vehicle The speed of the vehicle is maintained at a reasonable interval to improve the safety of driving.

The electric vehicle has a braking energy feedback system capable of implementing the above braking energy feedback method. For details, please refer to FIG. 3. FIG. 3 is a schematic structural diagram of an embodiment of a braking energy feedback system for an electric vehicle according to the present invention. The brake energy feedback system 100 of the present embodiment includes a first sensor 11, a second sensor 12, a third sensor 13, a controller 14, and a feedback switching system 15.

The first sensor 11 is used to detect the power of the power battery of the electric vehicle. The controller 14 determines whether the power battery meets the braking energy receiving condition according to the amount of power detected by the first sensor 11; if satisfied, the control feedback switching system 15 returns the braking energy generated by the driving motor of the electric vehicle to the power battery; If satisfied, the control feedback switching system 15 feeds back the braking energy to the powered device of the electric vehicle.

Corresponding to the steps S11, S12 in the above-mentioned braking energy feedback method, that is, to realize the opening of the braking energy feedback function of the electric vehicle, the braking energy feedback system 100 further includes a second sensor 12 and a third sensor 13, second The sensor 12 is for detecting the opening degree of the accelerator pedal of the electric vehicle or the opening degree of the brake pedal of the electric vehicle, and the third sensor 13 is for detecting the vehicle speed of the electric vehicle.

The controller 14 determines whether the opening degree of the accelerator pedal of the electric vehicle is less than or equal to a preset first opening threshold according to the detection result of the second sensor 12; or determines whether the opening degree of the brake pedal of the electric vehicle is greater than or equal to a preset number Two opening threshold. If the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold; or the opening degree of the brake pedal is greater than or equal to the second opening degree threshold; the controller 14 further determines whether the vehicle speed of the electric vehicle is greater than or based on the detection result of the third sensor 13 Equal to the preset speed threshold, if the vehicle speed of the electric vehicle is greater than or equal to the speed threshold, the controller 14 activates the braking energy feedback function of the electric vehicle.

Corresponding to step S13 in the above-mentioned braking energy feedback method, the controller 14 determines whether the power battery meets the braking energy receiving condition according to the power battery power detected by the first sensor 11 when starting the braking energy feedback function of the electric vehicle. .

In the case where the feedback switching system 15 returns the braking energy to the electric device of the electric vehicle, the controller 14 adjusts the power of the electric device according to the power of the braking energy, wherein the adjusted power of the braking energy is larger, and the adjusted The power of the powered device is greater. Generally, the controller 14 adjusts the power of the powered device to a power equal to or greater than the braking energy.

In the present embodiment, the air conditioning system is selected as the electric equipment, corresponding to the above steps S151-S155, when the air conditioning system is not activated, the controller 14 controls the fan of the air conditioning system to remain closed, and opens the refrigeration component or system of the air conditioning system. a hot component; when the air conditioning system is in a cooling state, the controller 14 activates the heating component of the air conditioning system and boosts the power of the refrigeration component of the air conditioning system; when the air conditioning system is in the heating state, the controller 14 activates the refrigeration component of the air conditioning system And the power of the heating element of the air conditioning system is increased, and the braking energy is consumed by the air conditioning system while satisfying the user set temperature requirement.

In the brake energy feedback system of the present embodiment, the brake energy feedback function can be realized by the power battery storage or the air conditioning system dissipating in the braking condition during the long downhill driving, thereby improving the safety of driving.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of an embodiment of an electric vehicle according to the present invention. The vehicle 200 of the present embodiment includes a driving motor 21, a power battery 22, and a power generating device 23, The dynamic energy feedback system 24 and the vehicle body 25. The vehicle 200 can be a pure electric vehicle or a hybrid electric vehicle.

The brake energy feedback system 24 is similar to the brake energy feedback system 100 described above, having a first sensor 241, a second sensor 242, a third sensor 243, a controller 244, and a feedback switching system 245.

Specifically, the first sensor 241 is configured to detect the power of the power battery 22, and the controller 244 determines whether the power battery 22 satisfies the braking energy receiving condition according to the power of the power battery 22. If the braking energy receiving condition is met, the feedback switching system is controlled. 245 feeds back the braking energy generated by the driving motor 21 to the power battery 22. If the braking energy receiving condition is not satisfied, the control feedback switching system 245 returns the braking energy to the powered device 23.

The second sensor 242 is used to detect the opening degree of the accelerator pedal of the vehicle 200 or the opening degree of the brake pedal of the vehicle 200, and the third sensor 243 is used to detect the vehicle speed of the vehicle 200.

The controller 244 determines whether the opening degree of the accelerator pedal of the vehicle 200 is less than or equal to a preset first opening threshold, or determines whether the opening degree of the brake pedal of the vehicle 200 is greater than or equal to a preset second opening threshold, if the throttle If the opening degree of the pedal is less than or equal to the first opening threshold or the opening degree of the brake pedal is greater than or equal to the second opening threshold, the controller 244 further determines whether the vehicle speed of the vehicle 200 is greater than or equal to a preset speed threshold, if the vehicle 200 If the vehicle speed is greater than or equal to the speed threshold, the braking energy feedback function of the vehicle 200 is started, and whether the power battery 22 satisfies the braking energy receiving condition is determined according to the power of the power battery 22.

The controller 244 determines whether the power battery 22 satisfies the braking energy receiving condition by determining whether the power of the power battery 22 is less than or equal to a preset power threshold. If the amount of power of the power battery 22 is less than or equal to the power threshold, it is determined that the braking energy receiving condition is satisfied.

In the case where the braking energy is fed back to the electric device 23 of the vehicle 200, the controller 244 adjusts the power of the electric device 23 according to the power of the braking energy, wherein the electric power of the braking energy is larger, the adjusted air conditioning system The greater the power. Generally, the controller 244 adjusts the power of the powered device 23 to a power equal to or greater than the braking energy.

In the present embodiment, an air conditioning system is selected as the electrical equipment 23 of the vehicle 200. Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of an air conditioning system according to an embodiment of the electric vehicle shown in FIG. 4, wherein the air conditioning system 23 includes a fan 231 and compression. The machine 232 and the thermistor 233, wherein the compressor 232 is a cooling component of the air conditioning system 23, and the thermistor 233 is a heating component of the air conditioning system.

When the air conditioning system 23 is not activated, the controller 244 controls the fan of the air conditioning system 23 to remain in the closed state, and turns on the refrigeration unit of the air conditioning system 23, that is, the compressor 232 or the heating element, that is, the thermistor 233.

When the air conditioning system 23 is in the cooling state, the controller 244 activates the thermistor 233 which is the heating component of the air conditioning system 23, and boosts the power of the refrigeration element of the air conditioning system 23, that is, the compressor 232.

When the air conditioning system 233 is in the heating state, the controller 244 activates the refrigeration unit, that is, the compressor 232 of the air conditioning system 23, and boosts the power of the thermistor 233, which is the heating element of the air conditioning system 23.

Further, the braking energy is consumed by the air conditioning system 23 when the user set temperature requirement is satisfied.

In the braking condition of the electric vehicle according to the present embodiment, the braking energy feedback function is realized by the power battery storage or the air conditioning system dissipating in the braking condition during long downhill driving, and the safety performance is good.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and equivalent structural transformation or equivalent flow transformation using the specification and the drawings of the present invention, or directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims (20)

1. A braking energy feedback method for an electric vehicle, characterized in that the method comprises:

   Detecting whether the power battery of the electric vehicle meets a braking energy receiving condition;

   If the braking energy receiving condition is met, the braking energy generated by the driving motor of the electric vehicle is fed back to the power battery;

   If the braking energy receiving condition is not satisfied, the braking energy is fed back to the electric device of the electric vehicle.
2. The method according to claim 1, wherein before the step of detecting whether the power battery of the electric vehicle meets the braking energy receiving condition, the method further comprises:

   Detecting whether the opening degree of the accelerator pedal of the electric vehicle is less than or equal to a preset first opening degree threshold, or detecting whether the opening degree of the brake pedal of the electric vehicle is greater than or equal to a preset second opening degree threshold;

   If the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold or the opening degree of the brake pedal is greater than or equal to the second opening degree threshold, further detecting whether the vehicle speed of the electric vehicle is greater than or equal to Preset speed threshold;

   If the vehicle speed of the electric vehicle is greater than or equal to the speed threshold, the braking energy feedback function of the electric vehicle is activated, and the step of detecting whether the power battery of the electric vehicle meets the braking energy receiving condition is performed.
3. The method according to claim 1, wherein the step of detecting whether the power battery satisfies the braking energy receiving condition comprises:

   Detecting whether the power of the power battery is less than or equal to a preset power threshold;

   If the power of the power battery is less than or equal to the power threshold, the braking energy receiving condition is met;

   If the power of the power battery is greater than the power threshold, the braking energy receiving condition is not satisfied.
4. The method of claim 1 wherein said step of providing said braking energy to said powered device comprises:

   Adjusting the power of the powered device according to the power of the braking energy, wherein the greater the power of the braking energy, the greater the power of the adjusted electrical device.
5. The method according to claim 4, wherein the step of adjusting the power of the powered device according to the power of the braking energy comprises:

   The power of the powered device is adjusted to be equal to or greater than the power of the braking energy.
6. The method according to claim 4, wherein the powered device is an air conditioning system, and the step of adjusting the power of the powered device according to the power of the braking energy comprises:

   Detecting whether the air conditioning system is activated;

   If the air conditioning system is not activated, the fan of the air conditioning system is controlled to remain in a closed state, and the cooling component or the heating component of the air conditioning system is turned on.
7. The method according to claim 6, wherein the electric device is an air conditioning system, and the step of adjusting the power of the electric device according to the power of the braking energy further comprises:

   If the air conditioning system has been activated, detecting whether the air conditioning system is in a cooling state or a heating state;

   If in a cooling state, starting a heating component of the air conditioning system and boosting a power of the refrigeration component of the air conditioning system;

   If in a heating state, starting a cooling component of the air conditioning system and boosting power of the heating element of the air conditioning system; and further consuming the brake by the air conditioning system if a user set temperature requirement is met energy.
8. A brake energy feedback system for an electric vehicle, characterized in that the system comprises a first sensor, a controller and a feedback switching system, the first sensor for detecting a power quantity of a power battery of the electric vehicle, The controller determines, according to the power quantity of the power battery, whether the power battery meets the braking energy receiving condition, and if the braking energy receiving condition is met, controlling the feedback switching system to generate the driving motor of the electric vehicle The kinetic energy is fed back to the power battery, and if the braking energy receiving condition is not met, the feedback switching system is controlled to feed the braking energy back to the electric device of the electric vehicle.
9. The system of claim 8 wherein said system further comprises a second sensor and a third sensor, wherein said second sensor is operative to detect an opening of said accelerator pedal of said electric vehicle or said electric vehicle The opening degree of the brake pedal, the third sensor is configured to detect a vehicle speed of the electric vehicle; and the controller determines whether an opening degree of the accelerator pedal of the electric vehicle is less than or equal to a preset first opening threshold, Or determining whether the opening degree of the brake pedal of the electric vehicle is greater than or equal to a preset second opening degree threshold; if the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold or the opening of the brake pedal If the degree is greater than or equal to the second opening threshold, the controller further determines whether the vehicle speed of the electric vehicle is greater than or equal to a preset speed threshold; if the vehicle speed of the electric vehicle is greater than or equal to the speed threshold, Then, the braking energy feedback function of the electric vehicle is started, and whether the power battery meets the braking energy receiving condition is determined according to the power of the power battery.
10. The system according to claim 8, wherein the controller determines whether the power of the power battery is less than or equal to a preset power threshold; if the power of the power battery is less than or equal to the power threshold, It is determined that the braking energy receiving condition is satisfied; if the power of the power battery is greater than the power threshold, the braking energy receiving condition is not satisfied.
11. The system according to claim 8, wherein in the case of feeding back the braking energy to the electric device of the electric vehicle, the controller adjusts the use according to the power of the braking energy The power of the electrical device, wherein the greater the power of the braking energy, the greater the power of the adjusted electrical device.
12. The system of claim 11 wherein said controller adjusts power of said powered device to a power equal to or greater than said braking energy.
13. The system according to claim 11, wherein said powered device is an air conditioning system, and when said air conditioning system is not activated, said controller controls said fan of said air conditioning system to remain off and open a cooling component or a heating component of the air conditioning system.
14. The system according to claim 13, wherein when said air conditioning system is in a cooling state, said controller activates a heating component of said air conditioning system and boosts a power of said refrigeration component of said air conditioning system; When the air conditioning system is in a heating state, the controller activates a cooling component of the air conditioning system, and boosts power of a heating element of the air conditioning system, thereby utilizing a user-set temperature requirement The air conditioning system consumes the braking energy.
15. A vehicle, comprising: a vehicle body, a drive motor, a power battery, a power consumption device, and a brake energy feedback system, the brake energy feedback system comprising a first sensor, a controller, and a feedback switching system, The first sensor is configured to detect a quantity of the power battery, and the controller determines, according to the power battery quantity, whether the power battery meets a braking energy receiving condition, and if the braking energy receiving condition is met, controlling The feedback switching system feeds back the braking energy generated by the driving motor to the power battery, and if the braking energy receiving condition is not met, controlling the feedback switching system to feed the braking energy back to the Electrical equipment.
16. The vehicle of claim 15 wherein said brake energy feedback system further comprises a second sensor and a third sensor, wherein said second sensor is operative to detect an opening or a position of an accelerator pedal of said vehicle Describes an opening degree of a brake pedal of the vehicle, the third sensor is configured to detect a vehicle speed of the vehicle; and the controller determines whether an opening degree of the accelerator pedal of the vehicle is less than or equal to a preset first opening threshold, Or determining whether the opening degree of the brake pedal of the vehicle is greater than or equal to a preset second opening degree threshold; if the opening degree of the accelerator pedal is less than or equal to the first opening degree threshold or the opening of the brake pedal The controller further determines whether the vehicle speed of the vehicle is greater than or equal to a preset speed threshold; if the vehicle speed of the vehicle is greater than or equal to the speed threshold, the startup is greater than or equal to the second opening threshold The braking energy feedback function of the vehicle is described, and it is determined whether the power battery satisfies the braking energy receiving condition according to the power of the power battery.
17. The vehicle according to claim 15, wherein the controller determines whether the power of the power battery is less than or equal to a preset power threshold; if the power of the power battery is less than or equal to the power threshold, It is determined that the braking energy receiving condition is satisfied; if the power of the power battery is greater than the power threshold, the braking energy receiving condition is not satisfied.
18. The vehicle according to claim 15, wherein in the case of feeding back the braking energy to the electric device of the vehicle, the controller adjusts the power according to the power of the braking energy The power of the device, wherein the greater the power of the braking energy, the greater the power of the adjusted electrical device.
19. The vehicle according to claim 18, wherein said controller adjusts power of said powered device to be equal to or greater than power of said braking energy.
20. The vehicle according to claim 18, wherein said electric device is an air conditioning system, and when said air conditioning system is not activated, said controller controls said fan of said air conditioning system to remain off and open a cooling component or a heating component of the air conditioning system, when the air conditioning system is in a cooling state, the controller activates a heating component of the air conditioning system, and boosts a power of the refrigeration component of the air conditioning system; When the air conditioning system is in a heating state, the controller activates a cooling component of the air conditioning system, and boosts power of the heating element of the air conditioning system, thereby utilizing the user's set temperature requirement. The air conditioning system consumes the braking energy.