Vehicle power control method and device, vehicle and storage medium

Abstract

The invention relates to a power control method and device of a vehicle, the vehicle and a storage medium. The method comprises the steps that whether the current vehicle is in a high-voltage state or not and whether the current vehicle is in a preset low-speed driving state or not is judged; if the current vehicle is in the high-pressure state and the current vehicle is in the preset low-speed driving state, the accelerator pedal opening degree of the current vehicle is obtained; and if the opening degree of the accelerator pedal is continuously lower than the preset opening degree within the preset duration, a power limiting instruction is sent to the driving motor to limit the output power of the driving motor, and otherwise, the current output power of the driving motor is maintained. Therefore, the problem that the vehicle is difficult to control due to improper power output control in the prior art is solved, and by designing different power control strategies, the risk that the vehicle is out of control is reduced, and the driving safety and comfort are improved.

Description

Technical Field

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

[0002] Currently, pure electric vehicle technology is developing rapidly, but there is a lack of technologies such as power control for pure electric vehicles. Many pure electric systems on the market have excessive power output during starting and low-speed driving, making the vehicle difficult to control, resulting in a reduced user experience.

[0003] Therefore, a power control method for pure electric vehicles is urgently needed. Summary of the invention

[0004] The present application provides a vehicle power control method, device, vehicle and storage medium to solve the problem in the background technology that the vehicle is difficult to control due to improper power output control. By designing different power control strategies, the risk of vehicle loss of control is reduced and driving safety and comfort are improved.

[0005] A first aspect of the present application provides a vehicle power control method, comprising the following steps:

[0006] Determining whether the current vehicle is in an upper high-pressure state and whether the current vehicle is in a preset low-speed driving state;

[0007] If the current vehicle is in the upper high-pressure state and the current vehicle is in the preset low-speed driving state, obtaining the accelerator pedal opening of the current vehicle;

[0008] If the accelerator pedal opening is continuously lower than the preset opening within a preset time period, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor; otherwise, the current output power of the drive motor is maintained.

[0009] According to one embodiment of the present application, after determining whether the current vehicle is in the upper high-pressure state and whether the current vehicle is in the preset low-speed driving state, the method further includes:

[0010] If the current vehicle is not in the upper high-voltage state, or if the current vehicle is in the upper high-voltage state and the current vehicle is not in a preset low-speed driving state, the current power of the drive motor is maintained.

[0011] According to an embodiment of the present application, limiting the output power of the drive motor includes:

[0012] Obtain the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer of the current vehicle;

[0013] Calculating the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer, and calculating the difference between the current available power of the battery management system and the sum to obtain the available output power;

[0014] The output power of the drive motor is obtained according to the product of the available output power and the preset power limit coefficient.

[0015] According to one embodiment of the present application, before maintaining the current power of the drive motor, the method further includes:

[0016] The sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle does not exceed the available power of the current battery management system.

[0017] According to one embodiment of the present application, the vehicle power control method further includes:

[0018] Determine whether the current battery management system has a level 3 fault;

[0019] If the current battery management system has the third-level fault, the sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle is limited to zero.

[0020] According to one embodiment of the present application, the three-level fault includes at least one of a battery cell temperature too high fault, a battery cell temperature too low fault, a battery cell temperature difference too large fault, a battery pack insulation fault, an overcharge fault, an over-discharge fault, a single cell voltage too low fault, and a single cell voltage too high fault.

[0021] According to the vehicle power control method provided by the embodiment of the present application, when the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state, the accelerator pedal opening of the current vehicle is obtained; if the accelerator pedal opening is continuously lower than the preset opening within a preset time, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained. Thus, the problem of the background technology that the vehicle is difficult to control due to improper power output control is solved, and by designing different power control strategies, the risk of vehicle loss of control is reduced, and the driving safety and comfort are improved.

[0022] A second aspect of the present application provides a power control device for a vehicle, comprising:

[0023] A judgment module, used to judge whether the current vehicle is in an upper high-pressure state and whether the current vehicle is in a preset low-speed driving state;

[0024] an acquisition module, configured to acquire the accelerator pedal opening of the current vehicle if the current vehicle is in the upper high-pressure state and the current vehicle is in the preset low-speed driving state;

[0025] The limiting module is used to send a power limiting instruction to the drive motor to limit the output power of the drive motor if the accelerator pedal opening is continuously lower than a preset opening within a preset time period, otherwise, maintain the current output power of the drive motor.

[0026] According to one embodiment of the present application, after determining whether the current vehicle is in the upper high-pressure state and whether the current vehicle is in the preset low-speed driving state, the determination module is further configured to:

[0027] If the current vehicle is not in the upper high-voltage state, or if the current vehicle is in the upper high-voltage state and the current vehicle is not in a preset low-speed driving state, the current power of the drive motor is maintained.

[0028] According to one embodiment of the present application, the restriction module is used to:

[0029] Obtain the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer of the current vehicle;

[0030] Calculating the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer, and calculating the difference between the current available power of the battery management system and the sum to obtain the available output power;

[0031] The output power of the drive motor is obtained according to the product of the available output power and the preset power limit coefficient.

[0032] According to an embodiment of the present application, before maintaining the current power of the drive motor, the judgment module or the limiting module is further configured to:

[0033] The sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle does not exceed the available power of the current battery management system.

[0034] According to one embodiment of the present application, the power control device of the vehicle is further used for:

[0035] Determine whether the current battery management system has a level 3 fault;

[0036] If the current battery management system has the third-level fault, the sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle is limited to zero.

[0037] According to one embodiment of the present application, the three-level fault includes at least one of a battery cell temperature too high fault, a battery cell temperature too low fault, a battery cell temperature difference too large fault, a battery pack insulation fault, an overcharge fault, an over-discharge fault, a single cell voltage too low fault, and a single cell voltage too high fault.

[0038] According to the vehicle power control device provided by the embodiment of the present application, when the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state, the accelerator pedal opening of the current vehicle is obtained; if the accelerator pedal opening is continuously lower than the preset opening within a preset time, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained. Thus, the problem of the background technology that the vehicle is difficult to control due to improper power output control is solved, and by designing different power control strategies, the risk of vehicle loss of control is reduced, and the driving safety and comfort are improved.

[0039] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle power control method as described in the above embodiment.

[0040] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the vehicle power control method as described in the above embodiments.

[0041] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0043] Figure 1 A flow chart of a vehicle power control method provided according to an embodiment of the present application;

[0044] Figure 2 is a flow chart of a vehicle power control method according to an embodiment of the present application;

[0045] Figure 3 is a block diagram of a power control device for a vehicle according to an embodiment of the present application;

[0046] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0048] The following describes the vehicle power control method, device, vehicle and storage medium of the embodiment of the present application with reference to the accompanying drawings. In response to the problem mentioned in the above background technology that the vehicle is difficult to control due to improper power output control, the present application provides a vehicle power control method, in which when the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state, the accelerator pedal opening of the current vehicle is obtained; if the accelerator pedal opening continues to be lower than the preset opening within a preset time, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained. Thus, the problem of the background technology that the vehicle is difficult to control due to improper power output control is solved, and by designing different power control strategies, the risk of vehicle loss of control is reduced, and the driving safety and comfort are improved.

[0049] Specifically, Figure 1 A schematic flow chart of a vehicle power control method provided in an embodiment of the present application.

[0050] like Figure 1 As shown, the vehicle power control method includes the following steps:

[0051] In step S101, it is determined whether the current vehicle is in an upper high pressure state and whether the current vehicle is in a preset low speed driving state.

[0052] Among them, the preset low-speed driving state can be a low-speed driving state pre-set by technical personnel in this field according to actual conditions, such as the current vehicle speed is in a certain lower speed range, which is not specifically limited here.

[0053] Specifically, the premise for the embodiment of the present application to judge the current high-pressure state and driving state of the vehicle is that the current vehicle gear is in the forward gear. The current high-pressure state and driving state of the vehicle in the embodiment of the present application can be jointly judged and obtained by the high-pressure state instruction of the VCU (Vehicle Control Unit) and the calibrated value vehicle speed obtained from the actual vehicle test, and no specific limitation is made here.

[0054] In step S102, if the current vehicle is in an upper high pressure state and the current vehicle is in a preset low speed driving state, the accelerator pedal opening of the current vehicle is obtained.

[0055] Specifically, if the current vehicle is in an upper high-pressure state and the current vehicle is in a preset low-speed driving state, the throttle pedal opening of the current vehicle can be obtained through the opening sensor. The opening state of the electronic throttle pedal in the embodiment of the present application should be input by the actual electronic throttle pedal opening as a valid input signal, and the virtual electronic throttle pedal opening of cruise and other states is not used as a valid input signal.

[0056] In step S103, if the accelerator pedal opening is continuously lower than the preset opening within the preset time period, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained.

[0057] The preset opening degree may be an opening degree preset by a person skilled in the art, and the preset duration may be a duration preset by a person skilled in the art, which are not specifically limited here. The output power of the drive motor in the embodiment of the present application is calculated by the VCU, and the accelerator pedal opening degree and the preset duration are used as calculation input sources.

[0058] Specifically, if the electronic accelerator pedal is continuously lower than the preset opening within the preset time, the VCU will send an instruction to limit the output power of the drive motor, wherein the VCU sends an instruction to limit the output power of the drive motor as the lowest restriction priority. For example, if there is a power demand based on the opening of the electronic accelerator pedal, and the opening of the electronic accelerator pedal is less than x% and lasts for y seconds, the VCU will send an instruction to limit the output power of the drive motor to z% of the available output power, wherein x, y, and z can be calibrated values ​​obtained from actual vehicle tests.

[0059] In addition, if the electronic accelerator pedal has been higher than the preset opening within the preset time period y, the VCU will not send a power limit instruction to the drive motor, wherein the VCU does not send a power limit instruction to the drive motor, which refers to an additional power limit instruction other than the VCU actively limiting the power due to detecting a fault in the high and low voltage system. For example, if there is a power demand based on the opening of the electronic accelerator pedal, and the opening of the electronic accelerator pedal is greater than or equal to x%, the VCU will send an instruction to cancel the output power limit of the drive motor.

[0060] Furthermore, in some embodiments, limiting the output power of the drive motor includes: obtaining the actual power of the air conditioner, the actual power of the heater, and the actual power of the DC transformer of the current vehicle; calculating the sum of the actual power of the air conditioner, the actual power of the heater, and the actual power of the DC transformer, and calculating the difference between the available power of the current battery management system and the sum to obtain the available output power; and obtaining the output power of the drive motor according to the product of the available output power and a preset power limiting coefficient.

[0061] Specifically, the embodiment of the present application can obtain the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer of the current vehicle through the vehicle controller VCU, and calculate the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer. After deducting the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer from the available power (continuous operating power) of the current battery management system, the available output power is obtained, and the product of the available output power and the preset power limit coefficient is calculated to obtain the output power of the drive motor.

[0062] For example, if the electronic accelerator pedal is continuously opened below x% within a preset time y, the VCU sends a command to limit the output power P of the drive motor. T =(P BMS -(P PTC +P AC +P DCDC ))*z%, where P BMS is the available power of the battery management system, P PTC is the actual power of the PTC thermal management heater, P AC is the actual power of the air conditioner, P DCDC is the actual power of the DCDC DC transformer, and z is the preset power limit coefficient.

[0063] Furthermore, in some embodiments, after determining whether the current vehicle is in an upper high-voltage state and whether the current vehicle is in a preset low-speed driving state, it also includes: if the current vehicle is not in an upper high-voltage state, or the current vehicle is in an upper high-voltage state and the current vehicle is not in a preset low-speed driving state, then maintaining the current power of the drive motor.

[0064] Specifically, if the current vehicle is not in the upper high-voltage state, or the current vehicle is in the upper high-voltage state and the current vehicle is not in the preset low-speed driving state, the VCU does not send a power limitation instruction to the drive motor, but only limits the actual power of the current vehicle's air conditioning (AC, Air conditioning), the actual power of the heater (PTC, Positive Temperature Coefficient), the actual power of the DC transformer (DCDC, Direct Current-Direct Current Converter) and the sum of the output power of the drive motor according to the available power of the battery management system (that is, the continuously allowed power). That is, under the premise that the output power of the drive motor and the sum of the actual power of the current vehicle's air conditioning, the actual power of the heater, and the actual power of the DC transformer do not exceed the continuously allowed power of the battery management system, the output power of the drive motor is not limited.

[0065] It should be noted that, in the present invention, the continuous allowable power of the battery management system can be calculated by the battery management system controller. In addition, the battery management system can also calculate the battery's allowable charging power (continuous), allowable discharging power (continuous), maximum allowable charging power (10s), maximum allowable discharging power (10s), current actual battery power usage, etc.; the limited power of the drive motor, the actual power of the air conditioner, the actual power of the thermal management heater and the actual power of the DC transformer can be calculated by the vehicle controller VCU.

[0066] Furthermore, in some embodiments, before maintaining the current power of the drive motor, it also includes: the sum of the actual power of the current vehicle's air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor does not exceed the available power of the current battery management system.

[0067] Specifically, if the vehicle is running at a low speed but the vehicle is on high voltage, the VCU will not send a power limit command to the drive motor. The sum of the actual power of the vehicle's air conditioner, the actual power of the heater, the actual power of the DC transformer, and the output power of the drive motor does not exceed the current available power of the battery management system, that is, P PTC +P AC +P DCDC +P T =P BMS , where P PTC is the actual power of the PTC thermal management heater, P AC is the actual power of the air conditioner, P DCDC is the actual power of the DCDC transformer, P T is the actual output power of the drive motor, P BMS is the available power for the battery management system.

[0068] Furthermore, in some embodiments, the vehicle power control method also includes: determining whether there is a third-level fault in the current battery management system; if there is a third-level fault in the current battery management system, limiting the sum of the actual power of the current vehicle's air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor to zero.

[0069] Among them, in some embodiments, the third-level fault includes at least one of a battery cell temperature too high fault, a battery cell temperature too low fault, a battery cell temperature difference too large fault, a battery pack insulation fault, an overcharge fault, an over-discharge fault, a single cell voltage too low fault and a single cell voltage too high fault.

[0070] Specifically, it is determined whether the current battery management system has a level 3 fault; if the current battery management system has a level 3 fault, the sum of the actual power of the current vehicle's air conditioner, the actual power of the heater, the actual power of the DC transformer, and the output power of the drive motor is limited to zero, that is, P PTC +P AC +P DCDC +P T =0, where P PTC is the actual power of the PTC thermal management heater, P AC is the actual power of the air conditioner, P DCDC is the actual power of the DCDC transformer, P T is the actual output power of the drive motor.

[0071] Therefore, according to the drive motor power control method of the pure electric vehicle of the present invention, the power control strategy is designed around different scenarios according to the working state of the whole vehicle and the working state of the battery management system, which solves the safety requirements of the whole vehicle in low-speed scenarios, reduces the risk of vehicle loss of control when the user uses the vehicle, improves driving safety and comfort, and takes into account the energy consumption target of the whole vehicle.

[0072] In order to facilitate those skilled in the art to more clearly and intuitively understand the vehicle power control method of the embodiment of the present application, the following is combined with Figure 2 Provide detailed explanation.

[0073] like Figure 2 As shown in the figure, the process starts from the "Start" node and first determines whether the battery management system (BMS) has a level 3 fault. If the battery management system has a level 3 fault, the sum of the power of the PTC heater, air conditioner (AC), DCDC DC transformer and drive motor is limited to zero, that is, P PTC +P AC +P DCDC +P T =0, and then the process ends.

[0074] If there is no level 3 fault in the BMS, it is determined whether the vehicle is in a high-voltage state and a low-speed driving state. If the vehicle is not in a high-voltage state or in a high-voltage state but not in a low-speed driving state, the VCU (vehicle control unit) does not send a power limit command to the drive motor, that is, P T =P BMS -(P PTC +P AC +P DCDC ), the process ends.

[0075] If the vehicle is currently on high pressure and is in a low-speed driving state, the opening state of the electronic accelerator pedal is further determined. If the accelerator pedal continues to be below a certain opening within a set period of time, the VCU will send a command to limit the output power of the drive motor. The calculation formula is P T =(P BMS -(P PTC +P AC +P DCDC ))*z%, where P BMS is the available power of the battery management system, P PTC is the actual power of the PTC thermal management heater, P AC is the actual power of the air conditioner, P DCDC is the actual power of the DCDC DC transformer, and z is the preset power limit coefficient.

[0076] If the accelerator pedal has been above a certain opening within the set time, the VCU will not send an instruction to limit the output power of the drive motor, and the process ends.

[0077] According to the vehicle power control method proposed in the embodiment of the present application, when the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state, the accelerator pedal opening of the current vehicle is obtained; if the accelerator pedal opening is continuously lower than the preset opening within a preset time, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained. Thus, the problem of the background technology that the vehicle is difficult to control due to improper power output control is solved, and by designing different power control strategies, the risk of vehicle loss of control is reduced, and the driving safety and comfort are improved.

[0078] Next, a power control device for a vehicle according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0079] Figure 3 It is a block diagram of a power control device for a vehicle according to an embodiment of the present application.

[0080] like Figure 3 As shown, the vehicle power control device 10 includes: a judgment module 100 , an acquisition module 200 and a restriction module 300 .

[0081] Among them, the judgment module 100 is used to judge whether the current vehicle is in an upper high-voltage state and whether the current vehicle is in a preset low-speed driving state; the acquisition module 200 is used to obtain the accelerator pedal opening of the current vehicle if the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state; the limiting module 300 is used to send a power limiting instruction to the drive motor if the accelerator pedal opening is continuously lower than the preset opening within a preset time period to limit the output power of the drive motor, otherwise, maintain the current output power of the drive motor.

[0082] Furthermore, in some embodiments, after determining whether the current vehicle is in an upper high-voltage state and whether the current vehicle is in a preset low-speed driving state, the judgment module 100 is also used to: if the current vehicle is not in an upper high-voltage state, or the current vehicle is in an upper high-voltage state and the current vehicle is not in a preset low-speed driving state, maintain the current power of the drive motor.

[0083] Furthermore, in some embodiments, the limiting module 300 is used to: obtain the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer of the current vehicle; calculate the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer, and calculate the difference between the available power of the current battery management system and the sum to obtain the available output power; obtain the output power of the drive motor according to the product of the available output power and the preset power limiting coefficient.

[0084] Furthermore, in some embodiments, before maintaining the current power of the drive motor, the judgment module 100 or the limitation module 300 is also used to ensure that the sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle does not exceed the available power of the current battery management system.

[0085] Furthermore, in some embodiments, the vehicle's power control device 10 also includes: determining whether there is a third-level fault in the current battery management system; if there is a third-level fault in the current battery management system, limiting the sum of the actual power of the current vehicle's air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor to zero.

[0086] Further, in some embodiments, the third-level fault includes at least one of a battery cell temperature too high fault, a battery cell temperature too low fault, a battery cell temperature difference too large fault, a battery pack insulation fault, an overcharge fault, an over-discharge fault, a single cell voltage too low fault, and a single cell voltage too high fault.

[0087] It should be noted that the above explanation of the embodiment of the vehicle power control method is also applicable to the vehicle power control device of this embodiment, which will not be repeated here.

[0088] According to the vehicle power control device proposed in the embodiment of the present application, when the current vehicle is in an upper high-voltage state and the current vehicle is in a preset low-speed driving state, the accelerator pedal opening of the current vehicle is obtained; if the accelerator pedal opening is continuously lower than the preset opening within a preset time, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor, otherwise, the current output power of the drive motor is maintained. Thus, the problem of the background technology that the vehicle is difficult to control due to improper power output control is solved, and by designing different power control strategies, the risk of vehicle loss of control is reduced, and the driving safety and comfort are improved.

[0089] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0090] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0091] When the processor 402 executes the program, the vehicle power control method provided in the above embodiment is implemented.

[0092] Furthermore, the vehicle also includes:

[0093] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0094] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0095] The memory 401 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0096] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0097] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0098] The processor 402 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0099] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned vehicle power control method.

[0100] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0101] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0103] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0104] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0105] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0106] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0107] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A vehicle power control method, characterized in that: The following steps are involved: Determining whether the current vehicle is in an upper high-pressure state and whether the current vehicle is in a preset low-speed driving state; If the current vehicle is in the upper high-pressure state and the current vehicle is in the preset low-speed driving state, obtaining the accelerator pedal opening of the current vehicle; If the accelerator pedal opening is continuously lower than the preset opening within a preset time period, a power limiting instruction is sent to the drive motor to limit the output power of the drive motor; otherwise, the current output power of the drive motor is maintained.

2. The method according to claim 1, characterized in that After determining whether the current vehicle is in the upper high-pressure state and whether the current vehicle is in the preset low-speed driving state, the method further includes: If the current vehicle is not in the upper high-voltage state, or if the current vehicle is in the upper high-voltage state and the current vehicle is not in a preset low-speed driving state, the current power of the drive motor is maintained.

3. The method according to claim 1, characterized in that The limiting the output power of the driving motor comprises: Obtain the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer of the current vehicle; Calculating the sum of the actual power of the air conditioner, the actual power of the heater and the actual power of the DC transformer, and calculating the difference between the current available power of the battery management system and the sum to obtain the available output power; The output power of the drive motor is obtained according to the product of the available output power and the preset power limit coefficient.

4. The method according to claim 1, characterized in that Before maintaining the current power of the driving motor, the method further includes: The sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle does not exceed the available power of the current battery management system.

5. The method according to claim 1, characterized in that Also includes: Determine whether the current battery management system has a level 3 fault; If the current battery management system has the third-level fault, the sum of the actual power of the air conditioner, the actual power of the heater, the actual power of the DC transformer and the output power of the drive motor of the current vehicle is limited to zero.

6. The method according to claim 5, characterized in that The three-level faults include at least one of a battery cell temperature too high fault, a battery cell temperature too low fault, a battery cell temperature difference too large fault, a battery pack insulation fault, an overcharge fault, an over-discharge fault, a single cell voltage too low fault, and a single cell voltage too high fault.

7. A power control device for a vehicle, characterized in that: include: A judgment module, used to judge whether the current vehicle is in an upper high-pressure state and whether the current vehicle is in a preset low-speed driving state; an acquisition module, configured to acquire the accelerator pedal opening of the current vehicle if the current vehicle is in the upper high-pressure state and the current vehicle is in the preset low-speed driving state; The limiting module is used to send a power limiting instruction to the drive motor to limit the output power of the drive motor if the accelerator pedal opening is continuously lower than a preset opening within a preset time period, otherwise, maintain the current output power of the drive motor.

8. The device according to claim 7, characterized in that After determining whether the current vehicle is in the upper high-pressure state and whether the current vehicle is in the preset low-speed driving state, the determination module is further used to: If the current vehicle is not in the upper high-voltage state, or if the current vehicle is in the upper high-voltage state and the current vehicle is not in a preset low-speed driving state, the current power of the drive motor is maintained.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle power control method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the power control method for a vehicle according to any one of claims 1 to 6.

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