Vehicle, control method and control device therefor

Abstract

The application discloses a vehicle and a control method and a control device thereof, and the method comprises the following steps: acquiring the whole vehicle demand power, the whole vehicle heat generation amount and the whole vehicle heat dissipation amount within a preset time, and the residual charge amount and the temperature of the power battery; determining the engine basic distribution power based on the residual charge amount and the whole vehicle demand power; in the case that the whole vehicle heat generation amount is greater than the whole vehicle heat dissipation amount or the temperature of the power battery is greater than a first preset temperature threshold, limiting the power of the power battery to a first preset power threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power; and controlling the engine based on the engine target power. The control method can make the engine power and the power battery power relatively balanced, and can not cause uncontrollable temperature rise of a single assembly under continuous high load, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of spending additional cost to upgrade the hardware heat dissipation capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle control method, a vehicle and a vehicle control device. BACKGROUND

[0002] The energy management strategy of the current hybrid vehicle is executed based on the pre-set rules, and the same management strategy is used for different drivers. The traditional algorithm cannot optimize the energy distribution strategy of the single vehicle. Therefore, when the temperature of the engine or the power battery of the vehicle rises, the vehicle cannot be in the best performance state. In addition, in the related art, a heat dissipation device is added to improve the problem of temperature rise of the power battery or the engine, but this way increases the cost. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the first object of the present application is to provide a vehicle control method, which comprises: obtaining the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation within a preset time, and the remaining charge capacity and the temperature of the power battery; determining the engine basic distribution power based on the remaining charge capacity and the whole vehicle demand power; limiting the power of the power battery to a first preset power threshold in the case that the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power; and controlling the engine based on the engine target power, so that the engine power and the power battery power are relatively balanced, and the single assembly temperature does not rise uncontrollably even under continuous high load, the vehicle maintains good performance for a long time, and the cost is reduced without the need for additional cost to upgrade the hardware heat dissipation capacity.

[0004] The second object of the present application is to provide a vehicle.

[0005] The third object of the present application is to provide a vehicle control device.

[0006] To achieve the above-mentioned objects, the first aspect of the present application provides a vehicle control method, which comprises: obtaining the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation within a preset time, and the remaining charge capacity and the temperature of the power battery; determining the engine basic distribution power based on the remaining charge capacity and the whole vehicle demand power; limiting the power of the power battery to a first preset power threshold in the case that the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power; and controlling the engine based on the engine target power.

[0007] According to the control method of the vehicle, the vehicle demand power, the vehicle heat generation amount and the vehicle heat dissipation amount within the preset time, and the residual state of charge and the temperature of the power battery are obtained; the engine basic distribution power is determined based on the residual state of charge and the vehicle demand power; in the case that the vehicle heat generation amount is greater than the vehicle heat dissipation amount or the temperature of the power battery is greater than the first preset temperature threshold, the power of the power battery is limited to the first preset power threshold, and the engine basic distribution power is adjusted based on the vehicle demand power and the first preset power threshold to obtain the engine target power; and the engine is controlled based on the engine target power. Therefore, the method can relatively balance the engine power and the power battery power, and can not cause uncontrollable temperature rise of a single assembly under continuous high load, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of additional cost for upgrading the hardware heat dissipation capacity.

[0008] In addition, the control method of the vehicle according to the above-mentioned embodiments of the present application can further have the following additional technical features:

[0009] According to an embodiment of the present application, the obtaining of the vehicle demand power comprises: obtaining a driver demand power and a high-voltage accessory power; and determining the vehicle demand power based on the sum of the driver demand power and the high-voltage accessory power.

[0010] According to an embodiment of the present application, the obtaining of the driver demand power comprises: obtaining a current opening degree of an accelerator pedal; determining a driver demand torque based on the maximum torque of the drive motor and the current opening degree; and determining the driver demand power based on the driver demand torque.

[0011] According to an embodiment of the present application, the obtaining of the vehicle heat generation amount within the preset time comprises: determining the vehicle heat generation amount based on the ratio of the integral of the driver demand torque within the preset time to the preset time.

[0012] According to an embodiment of the present application, the obtaining of the vehicle heat dissipation amount within the preset time comprises: obtaining an actual vehicle speed of the vehicle; determining an average vehicle speed based on the ratio of the integral of the actual vehicle speed within the preset time to the preset time; and determining the vehicle heat dissipation amount based on the average vehicle speed.

[0013] According to an embodiment of the present application, the determining of the engine basic distribution power based on the residual state of charge and the vehicle demand power comprises: determining a target charge-discharge power of the power battery; determining an engine power distribution proportionality coefficient based on the residual state of charge; and determining the engine basic distribution power based on the product of the sum of the vehicle demand power and the target charge-discharge power and the engine power distribution proportionality coefficient.

[0014] According to one embodiment of the present application, the adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power comprises: taking the difference between the whole vehicle demand power and the first preset power threshold as the engine target power.

[0015] According to one embodiment of the present application, the method further comprises: obtaining an engine temperature; in the case that the engine temperature is greater than a second preset temperature threshold, limiting the power of the engine to the second preset power threshold; and taking the second preset power threshold as the engine target power.

[0016] To achieve the above object, the second aspect of the present application provides a vehicle, comprising a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the vehicle control method.

[0017] According to the vehicle of the embodiments of the present application, by executing the vehicle control method, the engine power and the power battery power are relatively balanced, the single assembly temperature is not uncontrollably high even under continuous high load, the vehicle can maintain good performance for a long time, and the cost is reduced without extra cost for upgrading the hardware heat dissipation capacity.

[0018] To achieve the above object, the third aspect of the present application provides a vehicle control device, comprising: an obtaining module, configured to obtain a whole vehicle demand power, a whole vehicle heat generation amount and a whole vehicle heat dissipation amount within a preset time, and a remaining charge amount and a temperature of a power battery; a determining module, configured to determine an engine basic distribution power based on the remaining charge amount and the whole vehicle demand power; a correcting module, configured to limit the power of the power battery to a first preset power threshold in the case that the whole vehicle heat generation amount is greater than the whole vehicle heat dissipation amount or the temperature of the power battery is greater than a first preset temperature threshold, and adjust the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain an engine target power; and a control module, configured to control the engine based on the engine target power.

[0019] The control device of the vehicle according to the embodiment of the present application, the acquisition module is used for acquiring the whole vehicle demand power, the whole vehicle heat generation amount and the whole vehicle heat dissipation amount within a preset time, and the residual state of charge and the temperature of the power battery, the determination module is used for determining the engine basic distribution power based on the residual state of charge and the whole vehicle demand power, the correction module is used for limiting the power of the power battery to a first preset power threshold in the case that the whole vehicle heat generation amount is greater than the whole vehicle heat dissipation amount or the temperature of the power battery is greater than a first preset temperature threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power, and the control module is used for controlling the engine based on the engine target power. Therefore, the device can relatively balance the engine power and the power battery power, and the single assembly temperature cannot be uncontrollably raised even under continuous high load, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of spending additional cost to upgrade the hardware heat dissipation capacity.

[0020] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A flow chart of the control method of the vehicle according to an embodiment of the present application;

[0022] Figure 2 A flow chart of the control method of the vehicle according to one specific example of the present application;

[0023] Figure 3 A block schematic diagram of the vehicle according to an embodiment of the present application;

[0024] Figure 4 A block schematic diagram of the control device of the vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which like reference numerals indicate like elements or elements having the same or similar function throughout the several views. The embodiments described below are exemplary, and are intended to explain the present application, and should not be understood as limiting the present application.

[0026] The control method of the vehicle, the vehicle and the control device of the vehicle according to the embodiments of the present application are described below with reference to the accompanying drawings.

[0027] Figure 1 A flow chart of the control method of the vehicle according to an embodiment of the present application.

[0028] As Figure 1 shown, the control method of the vehicle according to the embodiment of the present application can include the following steps:

[0029] S1, obtain the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation in a preset time, and the remaining state of charge and the temperature of the power battery. The preset time can be determined according to the actual situation.

[0030] S2, determine the engine basic distribution power based on the remaining state of charge and the whole vehicle demand power.

[0031] S3, in the case that the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, limit the power of the power battery to a first preset power threshold, and adjust the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power.

[0032] S4, control the engine based on the engine target power.

[0033] Specifically, when controlling the engine, first, the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation in a preset time, and the remaining state of charge and the temperature of the power battery are obtained. For example, the whole vehicle demand power can be the total power required by the vehicle at the current moment calculated according to the driving demand of the driver (such as acceleration, speed maintenance, etc.). The preset time can be 60 seconds, and the whole vehicle heat generation in the preset time can be estimated by the running state of the vehicle (such as vehicle speed, driving mode, etc.) to estimate the total heat generated by each component of the vehicle (especially the power system components). Similarly, in the preset time, the total heat dissipation of the vehicle can be calculated according to the design of the vehicle's heat dissipation system and the current environmental conditions (such as vehicle speed, external temperature, etc.). The remaining state of charge of the power battery is the percentage of the current remaining power of the power battery, and the remaining state of charge and the temperature can be obtained through the battery management system.

[0034] After obtaining the whole vehicle demand power and the remaining state of charge, the engine basic distribution power can be determined according to the remaining state of charge and the whole vehicle demand power. When the remaining state of charge is high, the power battery can provide more power, and at this time the engine can distribute less power; on the contrary, when the remaining state of charge is low, in order to protect the battery from over-discharge, the engine needs to provide more power. Therefore, when determining the basic distribution power of the engine, the remaining state of charge and the whole vehicle demand power need to be combined to determine, for example, when the remaining state of charge is higher than a certain threshold, the proportion of the basic power provided by the engine to the whole vehicle demand power is lower; when the remaining state of charge is lower than a certain threshold, the proportion of the basic power provided by the engine to the whole vehicle demand power is higher.

[0035] After determining the base power of the engine, the engine can run according to the power, and the power battery runs according to the power obtained by subtracting the base power of the engine from the demand power of the vehicle. At this time, the power battery runs at a higher power, and long-term continuous output will cause the temperature of the power battery to continuously rise, causing the vehicle performance to deteriorate and even causing the vehicle to malfunction. Therefore, if the temperature of the power battery is greater than the first preset temperature threshold, or if the current vehicle heat generation is greater than the vehicle heat dissipation, it means that the current vehicle generates a large amount of heat, and the temperature of the power battery is high. In order to ensure the overall operation of the vehicle and maintain good performance, the power of the power battery can be limited to a safe preset value, i.e. the first preset power threshold. That is, at this power, the temperature of the battery will not continue to rise, and the vehicle heat generation is not greater than the heat dissipation. At the same time, the engine base distribution power is adjusted based on the demand power of the vehicle and the first preset power threshold to obtain the engine target power. That is, the power reduced by the power battery can be distributed to the engine to make up for the reduced demand power of the vehicle due to the limitation of the battery power, so as to ensure that the vehicle can still meet the driving demand.

[0036] Therefore, after determining the engine target power, the engine can be controlled according to the engine target power. For example, the engine power calculation value can be converted into an engine target speed value and an engine target torque value, and the engine is controlled to run according to the target speed value and the target torque value. Therefore, the vehicle can maintain good performance for a long time, greatly improve the vehicle experience, and reduce the cost without spending additional cost to upgrade the hardware heat dissipation capacity.

[0037] According to an embodiment of the present application, obtaining the demand power of the vehicle includes: obtaining the demand power of the driver and the high-voltage accessory power; and determining the demand power of the vehicle based on the sum of the demand power of the driver and the high-voltage accessory power.

[0038] Specifically, when obtaining the whole vehicle demand power, the driver demand power and the high-voltage accessory power can be obtained, wherein the driver demand power is calculated according to the input of the driver (such as the position of the accelerator pedal), which reflects the instantaneous demand of the driver for the power of the vehicle. For example, a preset function can be used to achieve this, which can output the corresponding driver demand power according to the position of the accelerator pedal. The high-voltage accessory power refers to the total power required by the devices other than the driving system of the vehicle and powered by the high-voltage battery. For example, it can include the power consumption of the air conditioning system (the power consumption of the air conditioning compressor), the power consumption of the DC / DC (Direct Current to Direct Current) converter (for voltage conversion), and the power consumption of the heater (such as PTC (Positive Temperature Coefficient), for heating the vehicle interior). Real-time power consumption data of each accessory can be obtained through the power sensor or controller of each accessory, and the total power consumption of all high-voltage accessories can be obtained by adding up the power consumption of all high-voltage accessories.

[0039] After obtaining the driver demand power and the high-voltage accessory power, the whole vehicle demand power can be determined based on the sum of the driver demand power and the high-voltage accessory power, i.e., the whole vehicle demand power is the sum of the driver demand power and the high-voltage accessory power, so as to control the power distribution between the internal combustion engine and the electric motor according to the whole vehicle demand power, so as to meet the power demand and optimize the fuel efficiency and battery usage.

[0040] According to an embodiment of the present application, obtaining the driver demand power comprises: obtaining the current opening degree of the accelerator pedal; determining the driver demand torque based on the maximum torque of the driving motor and the current opening degree; and determining the driver demand power based on the driver demand torque.

[0041] Specifically, when obtaining the driver demand power, the current opening degree of the accelerator pedal can be obtained, for example, through the accelerator pedal position sensor. After obtaining the current opening degree of the accelerator pedal, the driver demand torque can be determined based on the maximum torque of the driving motor and the current opening degree, for example, through the formula: driver demand torque = (maximum torque / 100) * opening degree of accelerator pedal. After determining the driver demand torque, the driver demand power can be determined based on the driver demand torque, for example, according to a predetermined corresponding relationship, i.e., the driver demand torque and the driver demand power are in a one-to-one correspondence, and the driver demand power can be determined according to the corresponding relationship after determining the driver demand torque. Alternatively, a preset function can be used to achieve this, which can output the corresponding driver demand power according to the driver demand torque.

[0042] According to one embodiment of the present application, the heat generation of the vehicle in a preset time is obtained, including: determining the heat generation of the vehicle based on the ratio of the integral of the driver demand torque in the preset time to the preset time. Wherein, the preset time can be determined according to actual situation.

[0043] Specifically, obtaining the heat generation of the vehicle in a preset time helps to evaluate and control the heat generated by the vehicle in a certain time, so as to ensure that the vehicle runs at a safe and efficient temperature. When obtaining the heat generation of the vehicle in a preset time, the heat generation of the vehicle can be determined based on the ratio of the integral of the driver demand torque in the preset time to the preset time. For example, the preset time can be 60 seconds, that is, the data of the driver demand torque is continuously sampled in the past 60 seconds, and the obtained driver demand torque is integrated, and the numerical integration method such as trapezoidal rule or Simpson rule can be used, and the calculation result is divided by the preset time to obtain the average heat generation as the heat generation of the vehicle.

[0044] According to one embodiment of the present application, the heat dissipation of the vehicle in a preset time is obtained, including: obtaining the actual speed of the vehicle; determining the average speed based on the ratio of the integral of the actual speed in the preset time to the preset time; determining the heat dissipation of the vehicle based on the average speed. Wherein, the preset time can be determined according to actual situation.

[0045] Specifically, when obtaining the heat dissipation of the vehicle in a preset time, the actual speed of the vehicle can be obtained, such as through the speed sensor of the vehicle. After obtaining the actual speed, the average speed can be determined by integrating the actual speed in the preset time and calculating the ratio to the preset time. For example, the preset time can be 60 seconds, that is, in the past 60 seconds, the actual speed is continuously obtained, and the sampled speed data is integrated, and the numerical integration method such as trapezoidal rule or Simpson rule can be used to obtain the total driving distance, and the total driving distance is divided by the preset time to obtain the average speed. Therefore, based on the average speed, the heat dissipation of the vehicle during driving can be estimated. That is, the heat dissipation is related to the speed, because the vehicle dissipates heat through air flow during driving. For example, according to the design and test data of the vehicle, a heat dissipation model is determined in advance, which describes the relationship between speed and heat dissipation. The heat dissipation model and the average speed are used to calculate the heat dissipation of the vehicle. For example, the formula can be expressed as: heat dissipation of the vehicle = f(average speed), wherein f is the heat dissipation model function, which can include factors such as aerodynamic characteristics, vehicle surface area, and environmental temperature. Therefore, the heat dissipation state of the vehicle can be continuously monitored to ensure that the vehicle runs within a safe temperature range.

[0046] According to one embodiment of the present application, the engine basic distribution power is determined based on the state of charge and the vehicle demand power, comprising: determining the target charge-discharge power of the power battery; determining the engine power distribution proportion coefficient based on the state of charge; determining the engine basic distribution power based on the product of the sum of the vehicle demand power and the target charge-discharge power and the engine power distribution proportion coefficient.

[0047] Specifically, when determining the engine basic distribution power based on the state of charge and the vehicle demand power, the target charge-discharge power of the power battery can be determined, which refers to the charge or discharge level that the battery should maintain in order to maintain the health of the battery and prolong its life under certain driving conditions. In addition, the target charge-discharge power is positive, indicating a charging tendency, and the target charge-discharge power is negative, indicating a discharging tendency, which is obtained from real vehicle calibration according to the state of the battery and driving demand.

[0048] The engine power distribution proportion coefficient can be determined according to the state of charge, for example, it can be realized by a preset function, which can output the corresponding engine power distribution proportion coefficient according to the state of charge. The engine power distribution proportion coefficient is negatively correlated with the state of charge, that is, it decreases with the increase of the state of charge, which means that when the battery power is sufficient, more power can be relied on. After obtaining the engine power distribution proportion coefficient, the engine basic distribution power can be determined according to the product of the sum of the vehicle demand power and the target charge-discharge power and the engine power distribution proportion coefficient, that is, the sum of the vehicle demand power and the target charge-discharge power is multiplied by the engine power distribution proportion coefficient to obtain the engine basic distribution power. That is, the engine basic distribution power=(vehicle demand power+target charge-discharge power)×engine power distribution proportion coefficient.

[0049] According to one embodiment of the present application, the engine basic distribution power is adjusted based on the vehicle demand power and the first preset power threshold to obtain the engine target power, comprising: taking the difference between the vehicle demand power and the first preset power threshold as the engine target power.

[0050] Specifically, when the engine basic distribution power is adjusted based on the vehicle demand power and the first preset power threshold to obtain the engine target power, the difference between the vehicle demand power and the first preset power threshold can be taken as the engine target power. That is, when the power currently provided by the power battery is determined to be the first preset power threshold, in order to ensure the balanced output of the power battery and the engine, the engine target power can be made to be the vehicle demand power minus the first preset power threshold.

[0051] According to one embodiment of the present application, the control method of the vehicle further comprises: obtaining an engine temperature; limiting the power of the engine to a second preset power threshold value when the engine temperature is greater than a second preset temperature threshold value; and taking the second preset power threshold value as the target power of the engine. The second preset temperature threshold value and the second preset power threshold value can be determined according to actual conditions.

[0052] Specifically, during the operation of the vehicle, the engine temperature is monitored in real time, for example, the engine temperature can be measured by a temperature sensor installed at a key position of the engine (such as a cylinder, a cooling liquid passage, etc.). After obtaining the engine temperature, a judgment can be made according to the size relationship between the engine temperature and the second preset temperature threshold value, that is, the second preset temperature threshold value is used to define the upper limit of the normal operating range of the engine temperature. The setting of this threshold value is based on the design parameters of the engine and the reliability test of long-term operation. When it is detected that the engine temperature exceeds the second preset temperature threshold value, the power output of the engine can be reduced to reduce heat generation and prevent the engine from overheating. That is, the power of the engine can be limited to the second preset power threshold value, and the second preset power threshold value is the maximum output power allowed for the engine to operate when the engine temperature exceeds the safety threshold value. The setting of this threshold value aims to reduce the thermal load of the engine while still meeting the basic operating requirements of the vehicle. Thus, when the engine temperature is high, the second preset power threshold value can be taken as the target power of the engine to ensure the safe operation of the engine while optimizing the performance and fuel efficiency of the vehicle.

[0053] In summary, as a specific example, assume that the engine heat dissipation power boundary under the current vehicle speed condition is 60kw (second preset power threshold value) and the power battery heat dissipation power boundary is 40kw (first preset power threshold value). When the remaining charge of the power battery is high, such as 80%, the power battery is preferentially discharged at this time. When the sum of the driver demand power and the high-voltage accessory power is determined to be 80kw, and the product of the sum of the vehicle demand power and the target charge and discharge power and the engine power distribution proportionality coefficient is determined to be 20kw, then the basic distribution power of the power battery can be determined to be 60kw. As the power battery is used, the remaining charge becomes lower and lower, and the engine basic distribution power becomes higher. At this time, the power of the power battery is large, and long-term continuous output will cause the power battery to overheat, leading to poor vehicle performance and even assembly failure. Therefore, the power of the power battery can be controlled to decrease to the first preset power threshold value of 40kw, and the basic power of the engine can be controlled to increase to 40kw, so that the engine power and the power battery power are relatively balanced, and continuous high load will not cause uncontrollable temperature rise of a single assembly, and the vehicle can maintain good performance for a long time. Moreover, there is no need to spend extra cost to upgrade the hardware heat dissipation capacity, thereby reducing the cost.

[0054] The following will be described in combination withFigure 2 The control method of the application will be described.

[0055] As a specific example, the control method of the vehicle of the application can include the following steps:

[0056] S101, obtaining the driver demand power, the high-voltage accessory power, the driver demand torque, the actual vehicle speed, the remaining state of charge, the temperature and the target charge-discharge power of the power battery.

[0057] S102, determining the whole vehicle demand power based on the sum of the driver demand power and the high-voltage accessory power, determining the whole vehicle heat generation based on the ratio of the integral of the driver demand torque within a preset time to the preset time, and determining the average vehicle speed based on the ratio of the integral of the actual vehicle speed within a preset time to the preset time, and determining the whole vehicle heat dissipation according to the average vehicle speed.

[0058] S103, determining the engine power distribution proportionality coefficient based on the remaining state of charge.

[0059] S104, determining the engine basic distribution power based on the product of the sum of the whole vehicle demand power and the target charge-discharge power and the engine power distribution proportionality coefficient.

[0060] S105, judging whether the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold. If yes, step S106 is executed; if no, step S109 is executed.

[0061] S106, limiting the power of the power battery to a first preset power threshold.

[0062] S107, taking the difference between the whole vehicle demand power and the first preset power threshold as the engine target power.

[0063] S108, controlling the engine based on the engine target power.

[0064] S109, judging whether the temperature of the engine is greater than a second preset temperature threshold. If yes, step S110 is executed; if no, step S104 is executed.

[0065] S110, limiting the power of the engine to a second preset power threshold, and taking the second preset power threshold as the engine target power.

[0066] In summary, according to the control method of the vehicle of the embodiment of the present application, the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation in a preset time, and the residual state of charge and the temperature of the power battery are obtained; the engine basic distribution power is determined based on the residual state of charge and the whole vehicle demand power; in the case that the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, the power of the power battery is limited to a first preset power threshold, and the engine basic distribution power is adjusted based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power; and the engine is controlled based on the engine target power. Thus, the method can make the engine power and the power battery power relatively balanced, and the single assembly temperature will not be uncontrollably raised under continuous high load, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of spending extra cost to upgrade the hardware heat dissipation capacity.

[0067] Corresponding to the above embodiment, the present application further provides a vehicle.

[0068] As shown in Figure 3 the vehicle 200 of the embodiment of the present application can include a memory 210, a processor 220, and a program stored on the memory 210 and executable on the processor 220, and when the processor 220 executes the program, the control method of the vehicle described above is implemented.

[0069] According to the vehicle of the embodiment of the present application, by executing the control method of the vehicle described above, the engine power and the power battery power can be relatively balanced, and the single assembly temperature will not be uncontrollably raised under continuous high load, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of spending extra cost to upgrade the hardware heat dissipation capacity.

[0070] Corresponding to the above embodiment, the present application further provides a control device of a vehicle.

[0071] As shown in Figure 4 the control device 100 of the vehicle of the embodiment of the present application includes an acquisition module 110, a determination module 120, a correction module 130, and a control module 140.

[0072] The acquisition module 110 is configured to acquire the whole vehicle demand power, the whole vehicle heat generation and the whole vehicle heat dissipation in a preset time, and the residual state of charge and the temperature of the power battery. The determination module 120 is configured to determine the engine basic distribution power based on the residual state of charge and the whole vehicle demand power. The correction module 130 is configured to limit the power of the power battery to a first preset power threshold in the case that the whole vehicle heat generation is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, and adjust the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power. The control module 140 is configured to control the engine based on the engine target power.

[0073] According to an embodiment of the present application, the obtaining module 110 obtains the whole vehicle demand power, specifically for: obtaining the driver demand power and the high-voltage accessory power; determining the whole vehicle demand power based on the sum of the driver demand power and the high-voltage accessory power.

[0074] According to an embodiment of the present application, the obtaining module 110 obtains the driver demand power, specifically for: obtaining the current opening degree of the accelerator pedal; determining the driver demand torque based on the maximum torque of the driving motor and the current opening degree; determining the driver demand power based on the driver demand torque.

[0075] According to an embodiment of the present application, the obtaining module 110 obtains the whole vehicle heat generation amount within a preset time, specifically for: determining the whole vehicle heat generation amount based on the ratio of the integral of the driver demand torque within the preset time to the preset time.

[0076] According to an embodiment of the present application, the obtaining module 110 obtains the whole vehicle heat dissipation amount within a preset time, specifically for: obtaining the actual vehicle speed; determining the average vehicle speed based on the ratio of the integral of the actual vehicle speed within the preset time to the preset time; determining the whole vehicle heat dissipation amount based on the average vehicle speed.

[0077] According to an embodiment of the present application, the determining module 120 determines the engine basic distribution power based on the remaining charge amount and the whole vehicle demand power, specifically for: determining the target charge-discharge power of the power battery; determining the engine power distribution proportionality coefficient based on the remaining charge amount; determining the engine basic distribution power based on the product of the sum of the whole vehicle demand power and the target charge-discharge power and the engine power distribution proportionality coefficient.

[0078] According to an embodiment of the present application, the correction module 130 adjusts the engine basic distribution power based on the whole vehicle demand power and a first preset power threshold to obtain the engine target power, specifically for: taking the difference between the whole vehicle demand power and the first preset power threshold as the engine target power.

[0079] According to an embodiment of the present application, the correction module 130 is further configured to: obtain the engine temperature; limit the power of the engine to a second preset power threshold in the case that the engine temperature is greater than a second preset temperature threshold; take the second preset power threshold as the engine target power.

[0080] It should be noted that the details of the control device of the vehicle of the embodiments of the present application that are not disclosed herein can be referred to the details disclosed in the control method of the vehicle of the embodiments of the present application, which will not be described here in detail.

[0081] The control device of the vehicle according to the embodiment of the present application, the acquisition module is used for acquiring the whole vehicle demand power, the whole vehicle heat production and the whole vehicle heat dissipation in a preset time, and the remaining charge capacity and the temperature of the power battery, the determination module is used for determining the engine basic distribution power based on the remaining charge capacity and the whole vehicle demand power, the correction module is used for limiting the power of the power battery to a first preset power threshold in the case that the whole vehicle heat production is greater than the whole vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power, and the control module is used for controlling the engine based on the engine target power. Therefore, the device can relatively balance the engine power and the power battery power, and the continuous high load will not cause the uncontrollable temperature rise of the single assembly, so that the vehicle can maintain good performance for a long time, and the cost is reduced without the need of additional cost for upgrading the hardware heat dissipation capacity.

[0082] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a list of executable instructions for implementing logic functions, and can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor- based system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions, or in conjunction with which the instructions can be executed. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection having one or more wires (electrical apparatus), a portable computer diskette (magnetic apparatus), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber (optical apparatus), and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or another suitable medium upon which the program is printed, because the program can be electronically obtained, for example, by the optical scanning of the paper or other medium, followed by the electronic conversion of the optical scanning into the program, and then the storage of the program in the computer memory.

[0083] It should be understood that portions of the present application can be realized with a hardware, software, firmware or a combination thereof. In the above-described embodiments, a plurality of steps or methods can be realized with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized with hardware, and as in another embodiment, it can be realized with any one or a combination of the following technologies known in the art: discrete logic circuit having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

[0084] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] In addition, the terms "first", "second", "third", etc. are used only for the purpose of description and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0086] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0087] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A control method of a vehicle, characterized by, The method comprises: acquiring a whole vehicle demand power, a whole vehicle heat generation amount and a whole vehicle heat dissipation amount within a preset time, and a residual state of charge and a temperature of a power battery; determining an engine basic distribution power based on the residual state of charge and the whole vehicle demand power; in a case where the whole vehicle heat generation amount is greater than the whole vehicle heat dissipation amount or the temperature of the power battery is greater than a first preset temperature threshold, limiting a power of the power battery to a first preset power threshold, and adjusting the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain an engine target power; controlling the engine based on the engine target power; the acquiring of the whole vehicle heat dissipation amount within the preset time comprises: acquiring an actual vehicle speed of the vehicle; determining an average vehicle speed based on a ratio of an integral of the actual vehicle speed within the preset time to the preset time; determining the whole vehicle heat dissipation amount based on the average vehicle speed; the method further comprises: acquiring an engine temperature; in a case where the engine temperature is greater than a second preset temperature threshold, limiting a power of the engine to a second preset power threshold; taking the second preset power threshold as the engine target power.

2. The control method of a vehicle according to claim 1, characterized by the acquiring of the whole vehicle demand power comprises: acquiring a driver demand power and a high-voltage accessory power; determining the whole vehicle demand power based on a sum of the driver demand power and the high-voltage accessory power.

3. The control method of a vehicle according to claim 2, characterized by the acquiring of the driver demand power comprises: acquiring a current opening degree of an accelerator pedal; determining a driver demand torque based on a maximum torque of a drive motor and the current opening degree; determining the driver demand power based on the driver demand torque.

4. The control method of a vehicle according to claim 3, characterized by the acquiring of the whole vehicle heat generation amount within the preset time comprises: determining the whole vehicle heat generation amount based on a ratio of an integral of the driver demand torque within the preset time to the preset time.

5. The control method of a vehicle according to claim 1, characterized by the determining of the engine basic distribution power based on the residual state of charge and the whole vehicle demand power comprises: determining a target charge-discharge power of the power battery; determining an engine power distribution proportionality coefficient based on the residual state of charge; determining the engine basic distribution power based on a product of the sum of the whole vehicle demand power and the target charge-discharge power and the engine power distribution proportionality coefficient.

6. The control method of a vehicle according to claim 1, characterized by the adjusting of the engine basic distribution power based on the whole vehicle demand power and the first preset power threshold to obtain the engine target power comprises: taking a difference between the whole vehicle demand power and the first preset power threshold as the engine target power.

7. A vehicle characterized by comprising: comprise: a memory, a processor and a program stored in the memory and capable of running on the processor, when the processor executes the program, a control method of a vehicle according to any one of claims 1-6 is implemented.

8. A control device of a vehicle characterized by comprising: The device is used to implement the control method of the vehicle according to any one of claims 1-6, and the device comprises: an acquiring module, configured to acquire a whole vehicle demand power, a whole vehicle heat generation amount and a whole vehicle heat dissipation amount within a preset time, and a residual state of charge and a temperature of a power battery; a determining module, configured to determine an engine basic distribution power based on the residual state of charge and the whole vehicle demand power; The correction module is configured to limit the power of the power battery to a first preset power threshold when the total vehicle heat generation is greater than the total vehicle heat dissipation or the temperature of the power battery is greater than a first preset temperature threshold, and adjust the engine basic distribution power based on the total vehicle demand power and the first preset power threshold to obtain an engine target power. The control module is configured to control the engine based on the engine target power.

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