Braking control method, device, electronic device and storage medium

Abstract

The present application discloses a braking control method, device, electronic device and storage medium. The method and device are applied to a hybrid vehicle. The hybrid vehicle at least includes a power battery and a resistor device placed in the exhaust pipe of the engine. Specifically, when the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve; the braking system is controlled to brake the hybrid vehicle according to the braking demand torque; when the SOC of the power battery meets the preset conditions, the power battery is controlled to supply power to the resistor device. This solution reduces the SOC of the power battery to a certain level by consuming the power of the power battery, thereby avoiding insufficient braking torque output by the drive motor due to excessive battery power, thereby ensuring the braking capacity of the whole vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and more specifically, to a braking control method, device, electronic device and storage medium. Background Art

[0002] Hybrid vehicles use the internal combustion engine and the drive motor to work together to achieve driving or braking. When hybrid vehicles brake, they generally use electric regenerative braking and engine exhaust braking. Electric regenerative braking is to control the drive motor in the power generation mode, so as to convert the vehicle's kinetic energy into electrical energy and store it, thereby achieving braking; when the engine exhaust brake is used, the engine does not spray oil, and the vehicle reverses the engine through the transmission system. At the same time, by closing the exhaust throttle valve on the exhaust pipe, the exhaust resistance increases, increasing the engine's braking capacity. The exhaust braking capacity is related to the exhaust throttle valve opening. The smaller the exhaust throttle valve opening, the greater its exhaust braking capacity.

[0003] However, when hybrid vehicles are actually running, there is an objective situation that sometimes they will drive on long downhill roads. On some mountain roads, the downhill length may be several kilometers or even dozens of kilometers. In this way, when the vehicle is driving on a long downhill, the battery power is too high due to long-term energy recovery. At this time, the braking torque output by the drive motor is insufficient, resulting in a decrease in the braking ability of the entire vehicle. Summary of the invention

[0004] In view of this, the present application provides a braking control method, device, electronic device and storage medium for solving the problem of reduced braking ability of the entire vehicle during long downhill slopes.

[0005] In order to achieve the above objectives, the proposed solution is as follows:

[0006] A braking control method is applied to a hybrid vehicle, wherein the hybrid vehicle comprises at least a power battery and a resistor device disposed in an exhaust pipe of an engine, and the braking control method comprises the following steps:

[0007] When the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve;

[0008] controlling a braking system to brake the hybrid vehicle according to the braking demand torque;

[0009] When the SOC of the power battery meets a preset condition, the power battery is controlled to supply power to the resistance device.

[0010] Optionally, controlling the braking system to brake the hybrid vehicle according to the braking demand torque comprises the following steps:

[0011] When the braking demand torque is less than or equal to the maximum braking torque of the driving motor of the hybrid vehicle, only controlling the driving motor to brake the hybrid vehicle;

[0012] When the braking demand torque is greater than the maximum braking torque of the drive motor and less than or equal to the sum of the maximum braking torque of the drive motor and the maximum braking torque of the engine, controlling the drive motor and the engine to brake the hybrid vehicle;

[0013] When the braking demand torque is greater than the sum of the maximum braking torque of the driving motor and the maximum braking torque of the engine, the driving motor, the engine and the mechanical brake are controlled to brake the hybrid vehicle.

[0014] Optionally, when the SOC of the power battery meets a preset condition, controlling the power battery to supply power to the resistance device comprises the steps of:

[0015] When the value and the increasing speed of the SOC reach preset values ​​at the same time, the power battery is controlled to supply power to the resistance device.

[0016] Optionally, the following steps are also included:

[0017] During the process of the power battery supplying power to the resistance device, the opening of the exhaust throttle valve of the engine is controlled according to the temperature of the resistance device and the temperature of the post-processing device of the engine, so that the temperature of the resistance device and the temperature of the post-processing device meet the working requirements.

[0018] Optionally, the step of controlling the opening of the exhaust throttle valve of the engine according to the temperature of the resistor device and the temperature of the post-processing device of the engine comprises the steps of:

[0019] When the temperature of the resistor device is higher than a first temperature threshold, controlling the exhaust throttle valve of the engine to open to a preset degree so that the exhaust gas of the engine cools down the resistor device;

[0020] When the temperature of the aftertreatment device of the engine is lower than a second temperature threshold, and the difference between the temperature of the aftertreatment device and the temperature of the resistor device is greater than a temperature difference threshold, the exhaust throttle valve is opened to heat up the aftertreatment device.

[0021] Optionally, when the temperature of the resistor device is higher than a first temperature threshold, controlling the exhaust throttle valve of the engine to open to a preset opening degree comprises the steps of:

[0022] The opening value is determined according to the temperature of the resistor device, and the opening of the exhaust throttle valve is controlled according to the opening value.

[0023] A brake control device is applied to a hybrid vehicle, wherein the hybrid vehicle comprises at least a power battery and a resistor device disposed in an exhaust pipe of an engine, and the brake control device comprises:

[0024] a torque calculation unit configured to determine a braking demand torque according to a pedal opening of a brake pedal and a braking torque curve when a user makes a braking action;

[0025] a brake execution module, configured to control a brake system to brake the hybrid vehicle according to the brake demand torque;

[0026] The energy consumption control module is configured to control the power battery to supply power to the resistance device when the SOC of the power battery meets a preset condition.

[0027] Optionally, also include:

[0028] The temperature control module is configured to control the opening of the exhaust throttle valve of the engine according to the temperature of the resistance device and the temperature of the after-treatment device of the engine during the process of the power battery supplying power to the resistance device, so that the temperature of the resistance device and the temperature of the after-treatment device meet the working requirements.

[0029] An electronic device is applied to a hybrid vehicle, the electronic device comprising at least one processor and a memory connected to the processor, wherein:

[0030] The memory is used to store computer programs or instructions;

[0031] The processor is used to execute the computer program or instruction so that the electronic device implements the braking control method as described above.

[0032] A computer-readable storage medium is applied to an electronic device, wherein the storage medium carries one or more computer programs, and the one or more computer programs can be executed by the electronic device, so that the electronic device implements the braking control method as described above.

[0033] It can be seen from the above technical solutions that the present application discloses a braking control method, device, electronic device and storage medium. The method and device are applied to hybrid vehicles. The hybrid vehicles at least include a power battery and a resistor device placed in the exhaust pipe of the engine. Specifically, when the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve; the braking system is controlled to brake the hybrid vehicle according to the braking demand torque; when the SOC of the power battery meets the preset conditions, the power battery is controlled to supply power to the resistor device. This solution reduces the SOC of the power battery to a certain level by consuming the power of the power battery, thereby avoiding insufficient braking torque output by the drive motor due to excessive battery power, and ensuring the braking capacity of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a partial structure of a hybrid vehicle according to an embodiment of the present application;

[0036] Figure 2 A flowchart of a braking control method according to an embodiment of the present application;

[0037] Figure 3 A flowchart of another braking control method according to an embodiment of the present application;

[0038] Figure 4 A block diagram of a brake control device according to an embodiment of the present application;

[0039] Figure 5 A block diagram of another brake control device according to an embodiment of the present application;

[0040] Figure 6 A block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The present application provides a braking control method and device, which is applied to a hybrid vehicle. Figure 1 As shown, the hybrid vehicle provided in the present application includes basic vehicle equipment such as an engine, an after-treatment device of the engine and an exhaust throttle valve disposed between the engine and the after-treatment device, and also includes a power battery, and a resistor device is arranged in the exhaust pipe between the engine and the after-treatment device. The resistor device is electrically connected to the power battery through a wire and can be turned on or off under the control of a control device of the vehicle.

[0043] Figure 2 This is a flow chart of a braking control method according to an embodiment of the present application.

[0044] like Figure 2 As shown, the braking control method provided in this embodiment is applied to a hybrid vehicle, and is used to implement braking control on the hybrid vehicle. Specifically, it is an electronic device applied to the hybrid vehicle, and the electronic device can be understood as a computer or embedded device with data calculation, information processing and control capabilities, such as an MCU, ECU, etc. on the vehicle. The braking control method includes the following steps:

[0045] S1. Determine a braking demand torque according to a pedal opening of a brake pedal and a braking torque curve.

[0046] The so-called braking demand torque refers to the braking torque that needs to be applied to the vehicle to meet the user's need for the vehicle's braking effect. Specifically, when the user makes a braking action, the pedal opening of the brake pedal is obtained, and the pedal opening-brake torque relationship curve based on the pedal opening is searched to obtain the braking demand torque. The relationship curve can be obtained based on the bench test of a specific vehicle model.

[0047] S2. Controlling the braking system to brake the hybrid vehicle according to the braking demand torque.

[0048] In view of the fact that the braking methods of hybrid vehicles include motor braking, engine exhaust braking and mechanical brake braking, and the effect of each braking is different, therefore, in order to maximize the braking effect, this application adopts the following braking control mode:

[0049] On the one hand, if the braking demand torque is less than or equal to the maximum braking torque of the hybrid vehicle's drive motor, that is, the surface motor braking can meet the user's braking demand, then only the drive motor is controlled to brake the vehicle.

[0050] On the other hand, if the braking demand torque is greater than the maximum braking torque of the drive motor, but less than or equal to the maximum braking torque of the drive motor and the maximum braking torque of the engine exhaust brake, the clutch is controlled to combine the connection between the engine and the gearbox to intervene in the engine exhaust brake.

[0051] On the other hand, if the required braking torque is greater than the maximum braking torque of the drive motor and the maximum braking torque of the engine exhaust brake, it means that the motor braking and the engine exhaust braking can no longer meet the braking requirements. At this time, on the basis of motor braking and engine exhaust braking, the mechanical brake is controlled to intervene to ensure that the braking effect meets user needs.

[0052] S3. When the SOC of the power battery meets a preset condition, control it to supply power to the resistance device.

[0053] There are two effects of supplying power to the resistor device. One is that the resistor device consumes the electric energy of the drive battery. The so-called SOC refers to the nuclear power state of the power battery, which actually reflects the remaining power of the power battery. When a hybrid vehicle is on a long downhill section, the SOC of the power battery will continue to rise after a long period of braking feedback. If the SOC reaches a preset value, such as 90%, and the growth rate of the SOC exceeds another preset value, such as 0.1% / second, the power battery is connected to the resistor device, and the resistor device is used to consume part of the electric energy in the power battery, so as to ensure the braking effect of the drive motor.

[0054] In the case of only one power battery, based on the characteristics of the battery, it can only be charged or discharged at the same time, but not charged and discharged at the same time. Therefore, in the specific project implementation, when it is necessary to output electric energy to the resistor device, the electric energy fed back by the drive motor will stop charging the battery, and it can output electric energy to the resistor device at the same time as the power battery, or control the power battery to output electric energy to the resistor device alone.

[0055] It can be seen from the above technical solution that this embodiment provides a braking control method, which is applied to a hybrid vehicle, which at least includes a power battery and a resistor device placed in the exhaust pipe of the engine. Specifically, when the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve; the braking system is controlled to brake the hybrid vehicle according to the braking demand torque; when the SOC of the power battery meets the preset conditions, the power battery is controlled to supply power to the resistor device. This solution reduces the SOC of the power battery to a certain level by consuming the power of the power battery, thereby avoiding insufficient braking torque output by the drive motor due to excessive battery power, and ensuring the braking capacity of the whole vehicle.

[0056] In a specific implementation of the present application, the following steps are also included: Figure 3 shown.

[0057] S4. Control the opening of the exhaust throttle valve of the engine according to the temperature of the resistance device.

[0058] That is, when the power battery supplies power to the resistor device, the opening and closing and opening degree of the exhaust throttle valve of the engine are controlled according to the temperature of the resistor device and the temperature of the post-processing device of the engine, so that the temperature of the resistor device and the temperature of the post-processing device meet the working requirements. In this process, the temperature of the resistor device needs to be calculated, and the specific calculation process is as follows:

[0059] First, calculate the heating power P1 of the resistor device, the formula is as follows:

[0060] P1=U·I

[0061] Wherein, U is the output voltage of the power battery, and I is the current passing through the resistance device.

[0062] At the same time, calculate the heat dissipation power P2, the formula is as follows:

[0063] P2=k t ×A×(T R -T0)

[0064] Among them, k t is the comprehensive heat dissipation coefficient of the resistor device. Based on the preset curve of the exhaust flow rate, when the exhaust throttle valve is not opened, the exhaust flow rate is 0. A is the heat dissipation area of ​​the resistor device. T R is the resistor temperature and T0 is the ambient temperature.

[0065] The relationship between exhaust flow rate and comprehensive heat dissipation coefficient is shown in the following table:

[0066] Exhaust flow 0 50 100 150 200 250 300 350 400 Comprehensive heat dissipation coefficient 2.5 10 20 30 40 50 60 70 80

[0067] Then, the temperature T of the resistor can be calculated based on the heating and heat dissipation power, specific heat capacity, and mass of the resistor. The specific calculation formula is as follows:

[0068]

[0069] Among them, t is the time from the time the resistor is turned on to the current moment, m is the mass of the resistor device, c is the specific heat capacity of the resistor device, and Ti is the initial temperature of the resistor device, which is taken from the temperature of the engine's post-processing device.

[0070] Specifically, the present application implements the opening control of the exhaust throttle valve through the following steps.

[0071] On the one hand, when the temperature T of the resistor device is higher than the first temperature threshold (this value is lower than the maximum allowable temperature of the resistor, for example, the maximum allowable temperature of the resistor is 400°C, and this value can be set to 300°C), the exhaust throttle valve is opened to allow the exhaust gas of the engine to cool the resistor.

[0072] On the other hand, when the temperature of the aftertreatment device of the engine is lower than the second temperature threshold and the difference between the temperature of the aftertreatment device and the temperature of the resistor device is greater than the temperature difference threshold, the exhaust throttle valve is opened to heat up the aftertreatment device.

[0073] For example, when the temperature of the after-treatment device is lower than 200°C and the resistance temperature minus the temperature of the after-treatment device>Δt (Δt can be set to 20°C), the airflow is increased by controlling the opening of the exhaust throttle valve to heat the after-treatment device.

[0074] The opening of the exhaust throttle valve is based on the resistor temperature curve (see table below), which cools the resistor by increasing the through airflow and heats the aftertreatment to maintain the aftertreatment temperature.

[0075] Resistance temperature ℃ 200 250 300 380 400 Exhaust throttle valve opening % 0 20 50 100 100

[0076] Through the above operation, the resistance device can be protected, and by increasing the temperature of the post-processing device, the temperature of the post-processing device can be maintained within a reasonable range, thereby avoiding excessive vehicle emissions.

[0077] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0078] Although operations are depicted in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order.Multitasking and parallel processing may be advantageous under certain circumstances.

[0079] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0080] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as C or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer.

[0081] Figure 4 This is a block diagram of a brake control device according to an embodiment of the present application.

[0082] like Figure 4 As shown, the braking control device provided in this embodiment is applied to a hybrid vehicle and is used to implement braking control on the hybrid vehicle. Specifically, it is an electronic device applied to the hybrid vehicle. The electronic device can be understood as a computer or embedded device with data calculation, information processing and control capabilities, such as an MCU, ECU, etc. on the vehicle. The braking control device includes a torque calculation module 10, a braking execution module 20 and an energy consumption control module 30.

[0083] The torque calculation module is used to determine the braking demand torque according to the pedal opening of the brake pedal and the braking torque curve.

[0084] The so-called braking demand torque refers to the braking torque that needs to be applied to the vehicle to meet the user's need for the vehicle's braking effect. Specifically, when the user makes a braking action, the pedal opening of the brake pedal is obtained, and the pedal opening-brake torque relationship curve based on the pedal opening is searched to obtain the braking demand torque. The relationship curve can be obtained based on the bench test of a specific vehicle model.

[0085] The brake control module is used to control the brake system to brake the hybrid vehicle according to the brake demand torque.

[0086] In view of the fact that the braking methods of hybrid vehicles include motor braking, engine exhaust braking and mechanical brake braking, and the effect of each braking is different, therefore, in order to maximize the braking effect, this application adopts the following braking control mode:

[0087] On the one hand, if the braking demand torque is less than or equal to the maximum braking torque of the hybrid vehicle's drive motor, that is, the surface motor braking can meet the user's braking demand, then only the drive motor is controlled to brake the vehicle.

[0088] On the other hand, if the braking demand torque is greater than the maximum braking torque of the drive motor, but less than or equal to the maximum braking torque of the drive motor and the maximum braking torque of the engine exhaust brake, the clutch is controlled to combine the connection between the engine and the gearbox to intervene in the engine exhaust brake.

[0089] On the other hand, if the required braking torque is greater than the maximum braking torque of the drive motor and the maximum braking torque of the engine exhaust brake, it means that the motor braking and the engine exhaust braking can no longer meet the braking requirements. At this time, on the basis of motor braking and engine exhaust braking, the mechanical brake is controlled to intervene to ensure that the braking effect meets user needs.

[0090] The energy consumption control module is used to control the power battery to supply power to the resistance device when the SOC of the power battery meets the preset conditions.

[0091] There are two effects of supplying power to the resistor device. One is that the resistor device consumes the electric energy of the drive battery. The so-called SOC refers to the nuclear power state of the power battery, which actually reflects the remaining power of the power battery. When a hybrid vehicle is on a long downhill section, the SOC of the power battery will continue to rise after a long period of braking feedback. If the SOC reaches a preset value, such as 90%, and the growth rate of the SOC exceeds another preset value, such as 0.1% / second, the power battery is connected to the resistor device, and the resistor device is used to consume part of the electric energy in the power battery, so as to ensure the braking effect of the drive motor.

[0092] In the case of only one power battery, based on the characteristics of the battery, it can only be charged or discharged at the same time, but not charged and discharged at the same time. Therefore, in the specific project implementation, when it is necessary to output electric energy to the resistor device, the electric energy fed back by the drive motor will stop charging the battery, and it can output electric energy to the resistor device at the same time as the power battery, or control the power battery to output electric energy to the resistor device alone.

[0093] It can be seen from the above technical scheme that this embodiment provides a brake control device, which is applied to a hybrid vehicle, and the hybrid vehicle at least includes a power battery and a resistor device placed in the exhaust pipe of the engine. Specifically, when the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve; the braking system is controlled to brake the hybrid vehicle according to the braking demand torque; when the SOC of the power battery meets the preset conditions, the power battery is controlled to supply power to the resistor device. This solution reduces the SOC of the power battery to a certain level by consuming the power of the power battery, thereby avoiding insufficient braking torque output by the drive motor due to excessive battery power, and ensuring the braking capacity of the whole vehicle.

[0094] In a specific embodiment of the present application, a temperature control module 40 is also included. Figure 5 shown.

[0095] The temperature control module is used to control the opening of the exhaust throttle valve of the engine according to the temperature of the resistance device.

[0096] This module is used to control the opening and closing and opening degree of the engine's exhaust throttle valve according to the temperature of the resistance device and the temperature of the engine's post-processing device during the process of the power battery supplying power to the resistance device, so that the temperature of the resistance device and the temperature of the post-processing device meet the working requirements. In this process, the temperature of the resistance device needs to be calculated, and the specific calculation process is as follows:

[0097] First, calculate the heating power P1 of the resistor device, the formula is as follows:

[0098] P1=U·I

[0099] Wherein, U is the output voltage of the power battery, and I is the current passing through the resistance device.

[0100] At the same time, calculate the heat dissipation power P2, the formula is as follows:

[0101] P2=k t ×A×(T R -T0)

[0102] Among them, k t is the comprehensive heat dissipation coefficient of the resistor device. Based on the preset curve of the exhaust flow rate, when the exhaust throttle valve is not opened, the exhaust flow rate is 0. A is the heat dissipation area of ​​the resistor device. T R is the resistor temperature and T0 is the ambient temperature.

[0103] The relationship between exhaust flow rate and comprehensive heat dissipation coefficient is shown in the following table:

[0104] Exhaust flow 0 50 100 150 200 250 300 350 400 Comprehensive heat dissipation coefficient 2.5 10 20 30 40 50 60 70 80

[0105] Then, the temperature T of the resistor can be calculated based on the heating and heat dissipation power, specific heat capacity, and mass of the resistor. The specific calculation formula is as follows:

[0106]

[0107] Among them, t is the time from the time the resistor is turned on to the current moment, m is the mass of the resistor device, c is the specific heat capacity of the resistor device, and Ti is the initial temperature of the resistor device, which is taken from the temperature of the engine's post-processing device.

[0108] Specifically, the module implements the opening control of the exhaust throttle valve through the following steps.

[0109] On the one hand, when the temperature T of the resistor device is higher than the first temperature threshold (this value is lower than the maximum allowable temperature of the resistor, for example, the maximum allowable temperature of the resistor is 400°C, and this value can be set to 300°C), the exhaust throttle valve is opened to allow the exhaust gas of the engine to cool the resistor.

[0110] On the other hand, when the temperature of the aftertreatment device of the engine is lower than the second temperature threshold and the difference between the temperature of the aftertreatment device and the temperature of the resistor device is greater than the temperature difference threshold, the exhaust throttle valve is opened to heat up the aftertreatment device.

[0111] For example, when the temperature of the after-treatment device is lower than 200°C and the resistance temperature minus the temperature of the after-treatment device>Δt (Δt can be set to 20°C), the airflow is increased by controlling the opening of the exhaust throttle valve to heat the after-treatment device.

[0112] The opening of the exhaust throttle valve is based on the resistor temperature curve (see table below), which cools the resistor by increasing the through airflow and heats the aftertreatment to maintain the aftertreatment temperature.

[0113] Resistance temperature ℃ 200 250 300 380 400 Exhaust throttle valve opening % 0 20 50 100 100

[0114] Through the above operation, the resistance device can be protected, and by increasing the temperature of the post-processing device, the temperature of the post-processing device can be maintained within a reasonable range, thereby avoiding excessive vehicle emissions.

[0115] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware. The name of a unit does not limit the unit itself in some cases. For example, the first acquisition unit may also be described as a "unit for acquiring at least two Internet Protocol addresses".

[0116] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0117] Figure 6 A block diagram of an electronic device according to an embodiment of the present application.

[0118] Reference below Figure 6, which shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present disclosure. The terminal device in the embodiments of the present disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The electronic device is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0119] The electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory ROM 602 or a program loaded from an input device 606 into a random access memory RAM 603. Various programs and data required for the operation of the electronic device are also stored in the RAM. The processing device, ROM, and RAM are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0120] Typically, the following devices may be connected to the I / O interface: input devices including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 608 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 609. The communication device 609 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an electronic device with various devices, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have alternatively.

[0121] The present application also provides a computer-readable storage medium embodiment.

[0122] The computer-readable storage medium is applied to an electronic device and carries one or more computer programs. When the one or more computer programs are executed by the electronic device, the electronic device determines the braking demand torque according to the pedal opening of the brake pedal and the braking torque curve when the user makes a braking action; controls the braking system to brake the hybrid vehicle according to the braking demand torque; and controls the power battery to supply power to the resistance device when the SOC of the power battery meets the preset conditions. This solution reduces the SOC of the power battery to a certain level by consuming the power of the power battery, thereby avoiding insufficient braking torque output by the drive motor due to excessive battery power, thereby ensuring the braking capacity of the entire vehicle.

[0123] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0124] In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0125] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0126] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0127] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0128] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A braking control method, applied to a hybrid vehicle, wherein the hybrid vehicle comprises at least a power battery and a resistor device disposed in an exhaust pipe of an engine, characterized in that: The braking control method comprises the steps of: When the user makes a braking action, the braking demand torque is determined according to the pedal opening of the brake pedal and the braking torque curve; controlling a braking system to brake the hybrid vehicle according to the braking demand torque; When the SOC of the power battery meets a preset condition, the power battery is controlled to supply power to the resistance device.

2. The braking control method according to claim 1, characterized in that: The method of controlling the braking system to brake the hybrid vehicle according to the braking demand torque comprises the following steps: When the braking demand torque is less than or equal to the maximum braking torque of the driving motor of the hybrid vehicle, only controlling the driving motor to brake the hybrid vehicle; When the braking demand torque is greater than the maximum braking torque of the drive motor and less than or equal to the sum of the maximum braking torque of the drive motor and the maximum braking torque of the engine, controlling the drive motor and the engine to brake the hybrid vehicle; When the braking demand torque is greater than the sum of the maximum braking torque of the driving motor and the maximum braking torque of the engine, the driving motor, the engine and the mechanical brake are controlled to brake the hybrid vehicle.

3. The braking control method according to claim 1, characterized in that: When the SOC of the power battery meets a preset condition, controlling the power battery to supply power to the resistance device comprises the steps of: When the value and the increasing speed of the SOC reach preset values ​​at the same time, the power battery is controlled to supply power to the resistance device.

4. The braking control method according to any one of claims 1 to 3, characterized in that: Also includes the steps: During the process of the power battery supplying power to the resistance device, the opening of the exhaust throttle valve of the engine is controlled according to the temperature of the resistance device and the temperature of the post-processing device of the engine, so that the temperature of the resistance device and the temperature of the post-processing device meet the working requirements.

5. The braking control method according to claim 4, characterized in that: The method of controlling the opening of the exhaust throttle valve of the engine according to the temperature of the resistor device and the temperature of the post-processing device of the engine comprises the steps of: When the temperature of the resistor device is higher than a first temperature threshold, controlling the exhaust throttle valve of the engine to open to a preset degree so that the exhaust gas of the engine cools down the resistor device; When the temperature of the aftertreatment device of the engine is lower than a second temperature threshold, and the difference between the temperature of the aftertreatment device and the temperature of the resistor device is greater than a temperature difference threshold, the exhaust throttle valve is opened to heat up the aftertreatment device.

6. The brake control method according to claim 5, characterized in that: When the temperature of the resistor device is higher than a first temperature threshold, controlling the exhaust throttle valve of the engine to open to a preset opening degree comprises the steps of: The opening value is determined according to the temperature of the resistor device, and the opening of the exhaust throttle valve is controlled according to the opening value.

7. A brake control device, applied to a hybrid vehicle, the hybrid vehicle comprising at least a power battery and a resistor device placed in an exhaust pipe of an engine, characterized in that: The brake control device comprises: a torque calculation unit configured to determine a braking demand torque according to a pedal opening of a brake pedal and a braking torque curve when a user makes a braking action; a brake execution module, configured to control a brake system to brake the hybrid vehicle according to the brake demand torque; The energy consumption control module is configured to control the power battery to supply power to the resistance device when the SOC of the power battery meets a preset condition.

8. The brake control device according to claim 7, characterized in that: Also includes: The temperature control module is configured to control the opening of the exhaust throttle valve of the engine according to the temperature of the resistance device and the temperature of the after-treatment device of the engine during the process of the power battery supplying power to the resistance device, so that the temperature of the resistance device and the temperature of the after-treatment device meet the working requirements.

9. An electronic device, applied to a hybrid vehicle, characterized in that: The electronic device comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs or instructions; The processor is used to execute the computer program or instruction so that the electronic device implements the braking control method according to any one of claims 1 to 6.

10. A computer-readable storage medium, applied to an electronic device, characterized in that: The storage medium carries one or more computer programs, and the one or more computer programs can be executed by the electronic device, so that the electronic device implements the braking control method as described in any one of claims 1 to 6.

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