Vehicle power supply control method, device, storage medium and vehicle

Abstract

The present application discloses a vehicle power supply control method, device, storage medium and vehicle, the method comprising: monitoring the state of charge of the power battery during the driving process of the vehicle; when the state of charge is greater than or equal to a first threshold, controlling the vehicle to use the stored power of the power battery to power the electronically controlled accessories; when the state of charge is less than the first threshold and greater than or equal to a second threshold, controlling the vehicle to use the power generated by the motor to power the electronically controlled accessories; the second threshold is less than the first threshold; when the state of charge is less than the second threshold, controlling the vehicle to store the power generated by the motor in the power battery, and using the stored power of the power battery to power the electronically controlled accessories. This method controls the vehicle to use the power generated by the motor to power the electronically controlled accessories when the state of charge is less than the first threshold and greater than or equal to the second threshold, which can reduce the energy loss caused by the charging and discharging process of the power battery, so as to effectively improve the energy utilization efficiency of the vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid vehicles, and in particular to a vehicle power supply control method, device, storage medium and vehicle. Background Art

[0002] The P1 architecture is a hybrid system structure for hybrid vehicles, which means that the motor is installed between the traditional internal combustion engine and the transmission to assist the internal combustion engine in providing power and realize the functions of energy recovery and storage. In actual applications, the P1 architecture uses 48V voltage to power the vehicle's electronically controlled accessories (i.e. various auxiliary equipment or components in the vehicle that are controlled by the electric control system, such as the air conditioning system, electric hydraulic power steering system, etc.) to provide more efficient energy management and lower costs.

[0003] In the existing hybrid system energy management solution based on the P1 architecture, the energy demand of the electronic control accessories for the power battery (usually refers to a high-performance battery used to drive the motor, usually used in hybrid vehicles or electric vehicles) causes the battery to be frequently charged and discharged. Due to the energy conversion loss during the charging and discharging process, the energy utilization efficiency of the hybrid vehicle is significantly reduced. Summary of the invention

[0004] The present application provides a vehicle power supply control method, device, storage medium and vehicle, aiming to improve the energy utilization efficiency of hybrid vehicles.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A vehicle power supply control method, comprising:

[0007] During the driving process of the vehicle, monitor the charge state of the power battery;

[0008] When the state of charge is greater than or equal to a first threshold, controlling the vehicle to use the stored power of the power battery to power the electronically controlled accessories;

[0009] When the state of charge is less than the first threshold and greater than or equal to a second threshold, controlling the vehicle to use the power generation of the motor to power the electronically controlled accessory; the second threshold is less than the first threshold;

[0010] When the state of charge is less than the second threshold, the vehicle is controlled to store the power generated by the motor in the power battery, and the stored power of the power battery is used to power the electronically controlled accessories.

[0011] Optionally, controlling the vehicle to use the power generated by the motor to power the electronically controlled accessory includes:

[0012] Obtaining the sum of power requirements of all electronically controlled accessories in the vehicle;

[0013] Determining a corresponding motor required torque according to the sum of the power requirements;

[0014] Based on the motor required torque, controlling the motor to generate electricity to generate an amount of electricity that meets the total power demand;

[0015] The vehicle is controlled to use the generated power to supply power to each of the electronically controlled accessories.

[0016] Optionally, based on the motor required torque, controlling the motor to generate power to generate power that meets the total power demand includes:

[0017] When controlling the motor to generate electricity based on the required torque of the motor, monitoring the power generation of the motor and the change in the state of charge of the power battery in real time;

[0018] Based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque;

[0019] Based on the corrected required torque, the electric machine is controlled to generate power to generate a power generation amount that satisfies the total power demand.

[0020] Optionally, based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque, including:

[0021] If the generated power is greater than or equal to the total power demand and the charge state change exceeds a specified interval, the motor demand torque is corrected according to a preset decrease amplitude to obtain a corrected demand torque; wherein the corrected demand torque is less than the motor demand torque.

[0022] Optionally, based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque, including:

[0023] If the generated power is less than the total power demand, the motor demand torque is corrected according to a preset increase amplitude to obtain a corrected demand torque; wherein the corrected demand torque is greater than the motor demand torque.

[0024] Optionally, the method further includes:

[0025] When the generated power is less than the total power demand, the vehicle is controlled to use the stored power of the power battery and the power generated by the motor simultaneously to supply power to the electronically controlled accessories.

[0026] Optionally, determining a corresponding motor required torque according to the total power demand includes:

[0027] Obtaining a motor speed of the vehicle;

[0028] The corresponding motor required torque is determined according to the ratio between the total power demand and the motor speed.

[0029] A vehicle power supply control device, comprising:

[0030] A state monitoring unit is used to monitor the charge state of the power battery during the driving process of the vehicle;

[0031] A battery power supply unit, used for controlling the vehicle to use the stored power of the power battery to supply power to the electronically controlled accessories when the state of charge is greater than or equal to a first threshold;

[0032] a motor power supply unit, configured to control the vehicle to use the power generated by the motor to supply power to the electronically controlled accessory when the state of charge is less than the first threshold and greater than or equal to a second threshold; the second threshold is less than the first threshold;

[0033] A battery charging unit is used to control the vehicle to store the power generated by the motor in the power battery when the state of charge is less than the second threshold value, and to use the stored power of the power battery to power the electronically controlled accessories.

[0034] Optionally, the motor power supply unit is specifically used for:

[0035] Obtaining the sum of power requirements of all electronically controlled accessories in the vehicle;

[0036] Determining a corresponding motor required torque according to the sum of the power requirements;

[0037] Based on the motor required torque, controlling the motor to generate electricity to generate an amount of electricity that meets the total power demand;

[0038] The vehicle is controlled to use the generated power to supply power to each of the electronically controlled accessories.

[0039] Optionally, the motor power supply unit is specifically used for:

[0040] When controlling the motor to generate electricity based on the required torque of the motor, monitoring the power generation of the motor and the change in the state of charge of the power battery in real time;

[0041] Based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque;

[0042] Based on the corrected required torque, the electric machine is controlled to generate power to generate a power generation amount that satisfies the total power demand.

[0043] Optionally, the motor power supply unit is specifically used for:

[0044] If the generated power is greater than or equal to the total power demand and the charge state change exceeds a specified interval, the motor demand torque is corrected according to a preset decrease amplitude to obtain a corrected demand torque; wherein the corrected demand torque is less than the motor demand torque.

[0045] Optionally, the motor power supply unit is specifically used for:

[0046] If the generated power is less than the total power demand, the motor demand torque is corrected according to a preset increase amplitude to obtain a corrected demand torque; wherein the corrected demand torque is greater than the motor demand torque.

[0047] Optionally, the motor power supply unit is also used for:

[0048] When the generated power is less than the total power demand, the vehicle is controlled to simultaneously use the stored power of the power battery and the power generated by the motor to supply power to the electronically controlled accessories.

[0049] Optionally, the motor power supply unit is specifically used for:

[0050] Obtaining a motor speed of the vehicle;

[0051] The corresponding motor required torque is determined according to the ratio between the total power demand and the motor speed.

[0052] A storage medium includes a stored program, wherein the program executes the vehicle power supply control method when executed by a processor.

[0053] A vehicle, comprising: a processor, a memory and a bus; the processor and the memory are connected via the bus;

[0054] The memory is used to store programs, and the processor is used to run programs, wherein the vehicle power supply control method is executed when the program is run by the processor.

[0055] The technical solution provided in the present application monitors the state of charge of the power battery during the driving process of the vehicle. When the state of charge is greater than or equal to the first threshold, the vehicle is controlled to use the stored power of the power battery to power the electronically controlled accessories. When the state of charge is less than the first threshold, and greater than or equal to the second threshold, the vehicle is controlled to use the power generated by the motor to power the electronically controlled accessories. The second threshold is less than the first threshold. When the state of charge is less than the second threshold, the vehicle is controlled to store the power generated by the motor in the power battery, and use the stored power of the power battery to power the electronically controlled accessories. In the present application, when the state of charge is less than the first threshold, and greater than or equal to the second threshold, the vehicle is controlled to use the power generated by the motor to power the electronically controlled accessories, which can reduce the energy loss caused by the charging and discharging process of the power battery, so as to effectively improve the energy utilization efficiency of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] 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.

[0057] Figure 1 A schematic diagram of a flow chart of a vehicle power supply control method provided in an embodiment of the present application;

[0058] Figure 2 A flow chart of another vehicle power supply control method provided in an embodiment of the present application;

[0059] Figure 3 A flow chart of another vehicle power supply control method provided in an embodiment of the present application;

[0060] Figure 4 A flow chart of another vehicle power supply control method provided in an embodiment of the present application;

[0061] Figure 5 A schematic diagram of the architecture of a vehicle power supply control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] 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.

[0063] In this application, relational terms such as first and second, etc. are used only 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. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or 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 device. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0064] like Figure 1 As shown, it is a flow chart of a vehicle power supply control method provided in an embodiment of the present application, including the following steps.

[0065] S101: During the driving of the vehicle, the state of charge of the power battery is monitored.

[0066] The vehicle includes but is not limited to a hybrid vehicle, and the hybrid architecture adopted by the hybrid vehicle may be a P1 architecture.

[0067] In some examples, the state of charge of the power battery may be obtained in real time from the vehicle's battery management system.

[0068] The so-called state of charge (SOC) can be understood as the percentage of available energy in the battery.

[0069] S102: When the state of charge is greater than or equal to a first threshold, controlling the vehicle to use the stored power of the power battery to power the electronically controlled accessories.

[0070] Among them, the charge state of the power battery is greater than the first threshold, indicating that the charging state of the power battery is good and sufficient to meet the power requirements of the vehicle. Therefore, the power battery can be selected to directly supply power to the electronically controlled accessories to maximize the utilization of the power battery's energy storage, avoid unnecessary power generation processes, and thus improve the vehicle's energy utilization efficiency.

[0071] S103: When the state of charge is less than a first threshold value and greater than or equal to a second threshold value, the vehicle is controlled to use the power generated by the motor to supply power to the electronically controlled accessories.

[0072] The second threshold is less than the first threshold. When the state of charge of the power battery is less than the first threshold and greater than or equal to the second threshold, the vehicle is controlled to use the power generated by the motor to power the electronically controlled accessories, which can avoid energy conversion losses during the battery charging and discharging process, thereby improving the energy utilization efficiency of the vehicle. In addition, it also reduces the number of charge and discharge times of the power battery, which helps to extend the life of the power battery.

[0073] Optionally, the process of controlling the vehicle to use the power generated by the motor to power the electronically controlled accessories can be found in Figure 2 Steps shown and explanations of the steps.

[0074] S104: When the state of charge is less than a second threshold, the vehicle is controlled to store the power generated by the motor into the power battery, and the stored power of the power battery is used to power the electronically controlled accessories.

[0075] Among them, when the state of charge is less than the second threshold, the vehicle is controlled to store the power generated by the motor in the power battery, and the stored power of the power battery is used to power the electronically controlled accessories, which can be understood as generating power by driving the motor and storing the generated energy back in the power battery. Since the process of generating power by driving the motor and storing the generated energy back in the power battery is only triggered when the state of charge is less than the second threshold (it can be considered that the stored power of the power battery is low at this time), energy loss can be reduced.

[0076] In some examples, combined Figure 2 , Figure 3 as well as Figure 4 According to the method shown, the embodiment of the present application can achieve small torque power generation of the motor and maximize the energy utilization efficiency and economy of the whole vehicle through energy management within the charge state range of the power battery. By avoiding unnecessary charging and discharging processes and energy conversion losses, it can more effectively utilize the available electrical energy, extend the service life of the power battery, and improve the performance and reliability of the vehicle.

[0077] It should be emphasized that the vehicle power supply control method shown in the embodiment of the present application can reduce the energy utilization efficiency of the whole vehicle compared with the prior art (according to the shortcomings of the prior art, the traditional charging method will cause energy loss due to the charging and discharging of the power battery. This is because there is energy conversion loss during the charging and discharging process, thereby reducing the energy utilization efficiency of the whole vehicle), and can effectively avoid energy loss (when the charge state is less than the first threshold value and greater than or equal to the second threshold value, the method of controlling the motor to directly power the electronically controlled accessories avoids the charging and discharging process of the power battery, thereby reducing energy conversion loss. This is because the motor directly converts the generated electric energy into electric energy to supply the electronically controlled accessories, omitting the intermediate link of the power battery and improving energy utilization efficiency), and can reduce the waste of electric energy caused by the charging and discharging of the power battery (since the motor directly supplies power to the electronically controlled accessories, it does not need to go through the charging and discharging process of the power battery, thereby reducing the waste of electric energy caused by the charging and discharging of the battery, which means that more electric energy is used to actually drive the vehicle or supply the electronically controlled accessories, rather than being lost during the charging and discharging process).

[0078] In the process shown in the above S101-S104, when the charge state is less than the first threshold and greater than or equal to the second threshold, the vehicle is controlled to use the power generated by the motor to power the electronically controlled accessories, which can reduce the energy loss caused by the charging and discharging process of the power battery, so as to effectively improve the energy utilization efficiency of the vehicle.

[0079] like Figure 2 As shown, it is a flow chart of another vehicle power supply control method provided in an embodiment of the present application, including the following steps.

[0080] S201: Obtain the total power requirements of all electronically controlled accessories in the vehicle.

[0081] The power requirements of various electronically controlled accessories in the vehicle can be queried through the vehicle's electronic control unit (ECU), and then the cumulative sum of the power requirements of various electronically controlled accessories is calculated to obtain the total power requirement.

[0082] S202: Determine the corresponding motor required torque according to the total power demand.

[0083] Among them, after obtaining the total power demand, the corresponding motor demand torque can be calculated using the total power demand. That is to say, the power generation generated by the motor in response to the motor demand torque can meet the total power demand, thereby ensuring that all electronically controlled accessories in the vehicle can operate normally.

[0084] Optionally, the realization process of determining the corresponding motor required torque according to the total power demand can be seen in Figure 3 Steps shown and explanations of the steps.

[0085] S203: Based on the required torque of the motor, control the motor to generate electricity to generate an amount of electricity that meets the total power demand.

[0086] The motor demand torque may be sent to a motor controller so that the motor controller responds to the motor demand torque and triggers the motor to generate electricity to generate an amount of electricity that meets the total power demand.

[0087] Optionally, based on the motor required torque, the motor is controlled to generate electricity to generate the power required to meet the total power demand. Figure 4 Steps shown and explanations of the steps.

[0088] S204: Control the vehicle to use the generated power to power various electronically controlled accessories.

[0089] Among them, the vehicle uses the generated power to power various electronic control accessories, so that the power supply of the electronic control accessories bypasses the power battery, avoiding energy conversion losses during the charging and discharging process of the power battery, thereby improving the energy utilization efficiency of the entire vehicle. In addition, it reduces the number of charge and discharge times of the power battery, which helps to extend the battery life.

[0090] The process shown in S201-S204 above determines the corresponding motor demand torque according to the total power demand, and controls the motor to generate electricity based on the motor demand torque to generate power generation that meets the total power demand, so that the vehicle can use the power generation to power various electronically controlled accessories, thereby avoiding energy conversion losses during the charging and discharging process of the power battery and effectively improving the energy utilization efficiency of the entire vehicle.

[0091] like Figure 3 As shown, it is a flow chart of another vehicle power supply control method provided in an embodiment of the present application, including the following steps.

[0092] S301: Obtain the motor speed of the vehicle.

[0093] Among them, the current response motor speed can be queried from the vehicle's ECU.

[0094] S302: Determine a corresponding motor required torque according to a ratio between the total power requirements and the motor speed.

[0095] The process of determining the corresponding motor required torque according to the ratio between the total power demand and the motor speed can be seen in formula (1).

[0096] (1)

[0097] The process shown in S301 - S302 above can calculate the corresponding motor required torque by using the total power demand and the motor speed.

[0098] like Figure 4 As shown, it is a flow chart of another vehicle power supply control method provided in an embodiment of the present application, including the following steps.

[0099] S401: When controlling the motor to generate electricity based on the motor's required torque, monitor the motor's generated power and the change in the state of charge of the power battery in real time.

[0100] Among them, the vehicle's ECU can be queried to monitor the motor's power generation in real time, and the vehicle's battery management system can be queried to monitor the change in the power battery's state of charge in real time.

[0101] It is understandable that when the motor is generating electricity, the power generation of the motor and the change in the state of charge of the power battery will change accordingly. Based on the power generation and the change in the state of charge, the power generation effect of the motor in response to the motor's required torque can be tracked in real time.

[0102] S402: Based on the generated power and the change in the state of charge, the motor required torque is corrected to obtain a corrected required torque.

[0103] Among them, the motor demand torque is corrected based on the power generation power and the change in charge state, which can ensure that when the power generation effect generated by the motor demand torque does not meet expectations, the motor demand torque can be corrected to obtain a corrected demand torque, and the power generation effect of the corrected demand torque is correspondingly improved.

[0104] Optionally, the motor demand torque is corrected based on the generated power and the change in state of charge to obtain a corrected demand torque. The implementation process can be as follows: if the generated power is greater than or equal to the total power demand and the change in state of charge exceeds a specified interval, the motor demand torque is corrected according to a preset decrease amplitude to obtain a corrected demand torque, wherein the corrected demand torque is less than the motor demand torque.

[0105] It should be noted that the generated power is greater than or equal to the total power demand, and the change in the state of charge exceeds the specified range, that is, the power generation effect generated by the motor in response to the motor demand torque is too high. The motor demand torque can be corrected according to the preset decrease range so that the corrected demand torque is less than the motor demand torque.

[0106] Optionally, the motor demand torque is corrected based on the generated power and the change in the state of charge to obtain a corrected demand torque. The implementation process can be as follows: if the generated power is less than the total power demand, the motor demand torque is corrected according to a preset increase amplitude to obtain a corrected demand torque, wherein the corrected demand torque is greater than the motor demand torque.

[0107] It is understandable that the generated power is less than the total power demand, that is, the power generation effect produced by the motor in response to the motor demand torque is low. The motor demand torque can be corrected according to the preset increase amplitude so that the corrected demand torque is greater than the motor demand torque.

[0108] S403: Based on the corrected required torque, control the motor to generate power to generate a power generation amount that meets the total power demand.

[0109] Among them, based on the corrected required torque, the motor is controlled to generate electricity, which can achieve closed-loop control of the motor's power generation to ensure that the motor's power generation effect meets the total power demand, so that all electronically controlled accessories in the vehicle can operate normally.

[0110] Optionally, when the generated power is less than the total power demand, the vehicle is controlled to use the stored power of the power battery and the power generated by the motor at the same time to power the electronically controlled accessories.

[0111] It should be noted that when the generated power is less than the total power demand, the power generated by the motor in response to the motor demand torque cannot support the operation of all the electronically controlled accessories in the vehicle. Therefore, in order to ensure the normal operation of all electronically controlled accessories, the vehicle can be controlled to use the stored power of the power battery and the power generated by the motor at the same time to power the electronically controlled accessories until the generated power is greater than or equal to the total power demand, and then the vehicle is controlled to stop using the power battery for power supply.

[0112] The process shown in S401-S403 above corrects the motor demand torque based on the generated power and the change in the state of charge to achieve closed-loop control of the motor power generation and ensure that the power generation effect of the motor can meet the total power demand.

[0113] like Figure 5 As shown, it is a schematic diagram of the architecture of a vehicle power supply control device provided in an embodiment of the present application, including the units shown below.

[0114] The state monitoring unit 100 is used to monitor the charge state of the power battery during the driving process of the vehicle.

[0115] The battery power supply unit 200 is used to control the vehicle to use the stored power of the power battery to power the electronically controlled accessories when the state of charge is greater than or equal to a first threshold.

[0116] The motor power supply unit 300 is used to control the vehicle to use the power generated by the motor to power the electronically controlled accessories when the state of charge is less than a first threshold and greater than or equal to a second threshold; the second threshold is less than the first threshold.

[0117] The battery charging unit 400 is used to control the vehicle to store the power generated by the motor into the power battery when the state of charge is less than a second threshold value, and to use the stored power of the power battery to power the electronically controlled accessories.

[0118] Optionally, the motor power supply unit 300 is specifically used to: obtain the total power requirements of all electronically controlled accessories in the vehicle; determine the corresponding motor demand torque based on the total power requirements; control the motor to generate electricity based on the motor demand torque to generate electricity that meets the total power requirements; and control the vehicle to use the electricity generated to power each electronically controlled accessory.

[0119] Optionally, the motor power supply unit 300 is specifically used to: when controlling the motor to generate electricity based on the motor demand torque, monitor the motor's generated power and the change in the state of charge of the power battery in real time; based on the generated power and the change in the state of charge, correct the motor's required torque to obtain a corrected required torque; based on the corrected required torque, control the motor to generate electricity to generate an amount of power that meets the total power demand.

[0120] Optionally, the motor power supply unit 300 is specifically used for: if the generated power is greater than or equal to the total power demand, and the charge state change exceeds a specified interval, the motor demand torque is corrected according to a preset decrease range to obtain a corrected demand torque; wherein the corrected demand torque is less than the motor demand torque.

[0121] Optionally, the motor power supply unit 300 is specifically used to: if the generated power is less than the total power demand, correct the motor demand torque according to a preset increase amplitude to obtain a corrected demand torque; wherein the corrected demand torque is greater than the motor demand torque.

[0122] Optionally, the motor power supply unit 300 is also used to: when the generated power is less than the total power demand, control the vehicle to simultaneously use the stored power of the power battery and the power generated by the motor to power the electronically controlled accessories.

[0123] Optionally, the motor power supply unit 300 is specifically used to: obtain the motor speed of the vehicle; and determine the corresponding motor demand torque according to the ratio between the total power demand and the motor speed.

[0124] For each unit shown above, when the state of charge is less than the first threshold and greater than or equal to the second threshold, the vehicle is controlled to use the power generated by the motor to power the electronically controlled accessories, which can reduce the energy loss caused by the charging and discharging process of the power battery, so as to effectively improve the energy utilization efficiency of the vehicle.

[0125] The present application also provides a computer-readable storage medium, which includes a stored program, wherein the program executes the vehicle power supply control method provided by the present application.

[0126] The present application also provides a vehicle, including: a processor, a memory and a bus. The processor and the memory are connected via the bus, the memory is used to store programs, and the processor is used to run the programs, wherein the vehicle power supply control method provided by the present application is executed when the programs are run.

[0127] In addition, the functions described above in the embodiments of the present application may be at least partially performed 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.

[0128] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present application. Certain features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0129] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A vehicle power supply control method, characterized in that: include: During the driving process of the vehicle, monitor the charge state of the power battery; When the state of charge is greater than or equal to a first threshold, controlling the vehicle to use the stored power of the power battery to power the electronically controlled accessories; When the state of charge is less than the first threshold value and greater than or equal to a second threshold value, obtaining the sum of power requirements of all electronically controlled accessories in the vehicle; Determining a corresponding motor required torque according to the sum of the power requirements; When controlling the motor to generate electricity based on the required torque of the motor, monitoring the power generation of the motor and the change in the state of charge of the power battery in real time; Based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque; Based on the modified required torque, controlling the motor to generate electricity to generate an amount of electricity that meets the total power demand, and controlling the vehicle to use the amount of electricity to power each of the electronically controlled accessories; The second threshold is less than the first threshold; When the state of charge is less than the second threshold, the vehicle is controlled to store the power generated by the motor in the power battery, and the stored power of the power battery is used to power the electronically controlled accessories.

2. The method according to claim 1, characterized in that Based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque, including: If the generated power is greater than or equal to the total power demand and the charge state change exceeds a specified interval, the motor demand torque is corrected according to a preset decrease amplitude to obtain a corrected demand torque; wherein the corrected demand torque is less than the motor demand torque.

3. The method according to claim 1, characterized in that: Based on the generated power and the charge state change, the motor required torque is corrected to obtain a corrected required torque, including: If the generated power is less than the total power demand, the motor demand torque is corrected according to a preset increase amplitude to obtain a corrected demand torque; wherein the corrected demand torque is greater than the motor demand torque.

4. The method according to claim 3, characterized in that The method further comprises: When the generated power is less than the total power demand, the vehicle is controlled to simultaneously use the stored power of the power battery and the power generated by the motor to supply power to the electronically controlled accessories.

5. The method according to claim 1, characterized in that Determining the corresponding motor required torque according to the total power demand includes: Obtaining a motor speed of the vehicle; The corresponding motor required torque is determined according to the ratio between the total power demand and the motor speed.

6. A vehicle power supply control device, characterized in that: include: A state monitoring unit is used to monitor the charge state of the power battery during the driving process of the vehicle; A battery power supply unit, used for controlling the vehicle to use the stored power of the power battery to supply power to the electronically controlled accessories when the state of charge is greater than or equal to a first threshold; a motor power supply unit, configured to control the vehicle to use the power generated by the motor to supply power to the electronically controlled accessory when the state of charge is less than the first threshold value and greater than or equal to a second threshold value; The second threshold is less than the first threshold; a battery charging unit, configured to control the vehicle to store the power generated by the motor in the power battery when the state of charge is less than the second threshold, and to use the stored power of the power battery to power the electronically controlled accessories; The motor power supply unit is used to control the vehicle to use the power generation of the motor to power the electronically controlled accessories, and is specifically used to obtain the sum of power requirements of all electronically controlled accessories in the vehicle; determine the corresponding motor demand torque according to the sum of power requirements; when controlling the motor to generate power based on the motor demand torque, monitor the power generation power of the motor and the change in the state of charge of the power battery in real time; based on the power generation power and the change in the state of charge, correct the motor demand torque to obtain a corrected demand torque; Based on the corrected required torque, the motor is controlled to generate electricity to produce an amount of electricity that meets the total power demand, and the vehicle is controlled to use the amount of electricity to power each of the electronically controlled accessories.

7. A storage medium, characterized in that: The storage medium includes a stored program, wherein the program, when executed by a processor, executes the vehicle power supply control method according to any one of claims 1 to 5.

8. A vehicle, characterized in that: include: processor, memory, and bus; The processor is connected to the memory via the bus; The memory is used to store programs, and the processor is used to run programs, wherein the program, when run by the processor, executes the vehicle power supply control method described in any one of claims 1-5.

Images