Vehicle control method and device and vehicle

Abstract

The invention provides a vehicle control method and device and a vehicle. According to the method, when it is detected that a range extender system of the vehicle is in a working state and a battery of the vehicle is in a discharging state, first electric quantity data of the battery is obtained in real time; then determining the first electric quantity data when the first electric quantity data of the battery is smaller than a first electric quantity threshold value as second electric quantity data, and when the real-time difference value between the first electric quantity data and the second electric quantity data is determined to be larger than a first difference value threshold value in real time, determining the required generated power of the range extender system according to the real-time difference value; and finally, controlling the vehicle to run according to the required generation power. According to the technical scheme, the required generation power of the range extender system is adjusted according to the real-time electric quantity of the power battery and the electric quantity data that the range extender system is in the working state, the battery of the vehicle is in the discharging state and the electric quantity data is smaller than the first electric quantity threshold value, the SOC balance of the power battery can be effectively maintained, meanwhile, the NVH performance can be improved, and therefore the economical efficiency of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle control method, device and vehicle. Background Art

[0002] Extended Range Electric Vehicle (EREV) combines the environmental protection characteristics of pure electric vehicles with the endurance of internal combustion engine range extenders. In order to optimize battery usage, extend the range, and improve vehicle operating efficiency, it is necessary to have a better energy management control strategy so that the vehicle performance can be improved as much as possible under different driving conditions.

[0003] In the vehicle control methods of the prior art, most are constructed based on simple rules or linear models, and the output power of the range extender is limited according to different vehicle speeds to control the vehicle operation.

[0004] Therefore, how to control the output power of the range extender in the vehicle to improve the performance of EREV has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiments of the present application provide a vehicle control method, device and vehicle to solve the problems in the prior art regarding how to develop a vehicle control method that can improve the performance of EREV.

[0006] In a first aspect, an embodiment of the present application provides a vehicle control method, including:

[0007] When it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state, first power data of the battery is acquired in real time;

[0008] When the first power data of the battery is less than the first power threshold, the first power data is determined as the second power data;

[0009] When it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold, determining the required power generation power of the range extender system according to the real-time difference;

[0010] The operation of the vehicle is controlled according to the required generated power.

[0011] In a possible design of the first aspect, the method further includes:

[0012] S01, after the vehicle has been running for a first preset time, when it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to a second difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and the operation of the vehicle is continued;

[0013] S02, repeating step S01 until it is determined in real time that the real-time difference between the first power data and the second power data is greater than the second difference threshold, and determining the required power generation power of the range extender system based on the speed information of the vehicle.

[0014] In another possible design of the first aspect, determining the required power generation power of the range extender system according to the real-time difference includes:

[0015] determining a first fuzzy factor of the range extender system according to the real-time difference;

[0016] The required power generation power of the range extender system is determined according to the real-time power generation power of the range extender system and the first fuzzy factor.

[0017] In a second aspect, an embodiment of the present application provides a vehicle control method, including:

[0018] When it is detected that the range extender system of the vehicle is in an operating state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time, first power data of the battery is acquired in real time;

[0019] When the first power data is greater than a second power threshold, determining a second fuzzy factor of an actual output power of a motor of the vehicle, a third fuzzy factor of a charging power of the battery, and a fourth fuzzy factor of a capacitor power state of the battery;

[0020] determining an operating state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor;

[0021] The operation of the vehicle is controlled according to the working state of the range extender system.

[0022] In a possible design of the second aspect, determining the operating state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor includes:

[0023] determining a product of the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor;

[0024] Determine the first electric quantity data corresponding to the time when the product is greater than 1 for the first time as the third electric quantity data;

[0025] When it is determined in real time that the real-time difference between the first power data and the third power data is greater than a third difference threshold, it is determined that the working state of the range extender system is shutdown.

[0026] In another possible design of the second aspect, the method further includes:

[0027] When it is determined in real time that the real-time difference between the first power data and the third power data is less than or equal to the third difference threshold, the current first power data is re-determined as the third power data, until it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

[0028] In yet another possible design of the second aspect, the method further includes:

[0029] When the working state of the range extender system is shutdown, when it is determined in real time that the real-time difference between the first power data and the third power data is less than a fourth difference threshold, the required power generation power of the range extender system is determined based on the speed information of the vehicle.

[0030] In a third aspect, an embodiment of the present application provides a vehicle control device, including:

[0031] an acquisition module, configured to acquire first power data of the battery in real time when it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state;

[0032] A first determining module, configured to determine the first power data of the battery as second power data when the first power data of the battery is less than a first power threshold;

[0033] a second determination module, configured to determine the required power generation power of the range extender system according to the real-time difference between the first power data and the second power data when it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold;

[0034] A control module is used to generate power according to the demand and control the operation of the vehicle.

[0035] In a possible design of the third aspect, the control module is further used to:

[0036] S01, after the vehicle has been running for a first preset time, when it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to a second difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and the operation of the vehicle is continued;

[0037] S02, repeating step S01 until it is determined in real time that the real-time difference between the first power data and the second power data is greater than the second difference threshold, and determining the required power generation power of the range extender system based on the speed information of the vehicle.

[0038] In another possible design of the third aspect, the second determination module determines the required power generation power of the range extender system according to the real-time difference, specifically for:

[0039] determining a first fuzzy factor of the range extender system according to the real-time difference;

[0040] The required power generation power of the range extender system is determined according to the real-time power generation power of the range extender system and the first fuzzy factor.

[0041] In a fourth aspect, an embodiment of the present application provides a vehicle control device, including:

[0042] an acquisition module, configured to acquire first power data of the battery in real time when it is detected that the range extender system of the vehicle is in an operating state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time length;

[0043] A first determination module, configured to determine, when the first power data is greater than a second power threshold, a second fuzzy factor of an actual output power of the motor of the vehicle, a third fuzzy factor of a charging power of the battery, and a fourth fuzzy factor of a capacitor power state of the battery;

[0044] The second determination module is used to determine the working state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor.

[0045] A control module is used to control the vehicle according to the working state of the range extender system.

[0046] In a possible design of the fourth aspect, the second determining module is specifically configured to:

[0047] determining a product of the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor;

[0048] Determine the first electric quantity data corresponding to the time when the product is greater than 1 for the first time as the third electric quantity data;

[0049] When it is determined in real time that the real-time difference between the first power data and the third power data is greater than a third difference threshold, it is determined that the working state of the range extender system is shutdown.

[0050] In another possible design of the fourth aspect, the control module is further used for:

[0051] When it is determined in real time that the real-time difference between the first power data and the third power data is less than or equal to the third difference threshold, the current first power data is re-determined as the third power data, until it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

[0052] In yet another possible design of the fourth aspect, the control module is further used to:

[0053] When the working state of the range extender system is shutdown, when it is determined in real time that the real-time difference between the first power data and the third power data is less than a fourth difference threshold, the required power generation power of the range extender system is determined based on the speed information of the vehicle.

[0054] In a fifth aspect, an embodiment of the present application provides a vehicle, comprising: a processor, and a memory communicatively connected to the processor;

[0055] The memory stores computer-executable instructions;

[0056] The processor executes the computer-executable instructions stored in the memory to implement the method as described in the first aspect or any one of the above methods.

[0057] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in the first aspect or any one of the methods above.

[0058] In the seventh aspect, an embodiment of the present application provides a computer program product, which includes a computer program, and the computer program is stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium, and when the at least one processor executes the computer program, it can implement the method described in the first aspect or any one of the methods above.

[0059] The vehicle control method, device and vehicle provided in the embodiment of the present application, when detecting that the range extender system of the vehicle is in working state and the battery of the vehicle is in discharging state, the method obtains the first power data of the battery in real time, and then determines the first power data of the battery when it is less than the first power threshold as the second power data, and when it is determined in real time that the real-time difference between the first power data and the second power data is greater than the first difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and finally the vehicle operation is controlled according to the required power generation power. In this technical solution, the required power generation power of the range extender system is adjusted according to the real-time power of the power battery and the power data when the range extender system is in working state, the battery of the vehicle is in discharging state and less than the first power threshold, which can effectively maintain the SOC balance of the power battery while improving the NVH performance, thereby improving the economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0061] Figure 1 A system principle framework diagram of a vehicle control method provided in an embodiment of the present application;

[0062] Figure 2 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 1 ;

[0063] Figure 3 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 2 ;

[0064] Figure 4 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 3 ;

[0065] Figure 5 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 4 ;

[0066] Figure 6 A schematic diagram of the structure of the vehicle control device provided in the embodiment of the present application Figure 1 ;

[0067] Figure 7 A schematic diagram of the structure of the vehicle control device provided in the embodiment of the present application Figure 2

[0068] Figure 8 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application.

[0069] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0071] Before introducing the embodiments of the present application, the application background of the embodiments of the present application is first explained:

[0072] As the global energy crisis becomes increasingly serious, new energy vehicles, especially electric vehicles (EVs), have attracted widespread attention due to their zero-emission or low-emission characteristics. Electric vehicles store electrical energy through batteries and drive electric motors to provide power, and have the advantages of high energy efficiency, low noise, and simple maintenance. However, the energy density and cost of batteries limit the range and popularity of electric vehicles.

[0073] EREV combines the environmental protection characteristics of pure electric vehicles with the endurance of internal combustion engine range extenders. When the battery is fully charged, EREV can operate as a pure electric vehicle; when the battery is insufficient, the range extender starts to generate electricity by burning fuel to charge the battery or directly drive the electric motor, thereby extending the driving distance. The energy management control strategy of EREV is used to optimize battery use, extend the driving range, improve vehicle operating efficiency, and effectively utilize the range extender under different driving conditions. However, under low-speed and high-load conditions, such as urban congestion, frequent start-stop and other scenarios, traditional energy management strategies often cannot balance the battery state (State Of Charge, SOC) of the power battery well, resulting in excessive discharge or charging of the battery, affecting battery life and vehicle performance. At the same time, the noise and vibration generated by the range extender during the power generation process will also have a negative impact on the noise, vibration and harshness (NVH) performance of the vehicle.

[0074] In the existing technology, EREV vehicle control methods are mostly based on simple rules or linear models, which lack adaptability to complex working conditions and variable driving behaviors. In actual driving, factors such as the driver's driving habits, road conditions, and traffic flow will affect energy consumption, and traditional control strategies are often difficult to respond to these changes in real time, which leads to the following technical problems:

[0075] (1) Power battery SOC balance problem: Under low-speed and high-load conditions, the SOC of the power battery may drop rapidly, causing excessive discharge of the battery, affecting battery life and vehicle performance.

[0076] (2) Optimization of vehicle NVH performance: The range extender may generate additional noise and vibration during the power generation process, affecting the NVH performance of the vehicle.

[0077] (3) Problems in optimizing braking safety and vehicle economy: Under high energy recovery conditions such as long downhill slopes, the range extender system generates electricity, causing the power battery SOC to increase, resulting in the inability to fully utilize the braking energy recovery of the drive motor system.

[0078] Therefore, how to control the output power of the range extender in the vehicle to improve the performance of EREV has become a technical problem that needs to be solved urgently.

[0079] In view of the technical problems existing in the prior art, the inventors of the present application have the following ideas: for low-speed and high-load conditions, if the power battery is lower than the set threshold and the whole vehicle is in a discharging state, the fuzzy factor is obtained by using the power battery SOC change, and the fuzzy factor is multiplied by the current power generation power of the range extender system to output the power generation power demand of the range extender system, so as to realize intelligent control of the power generation power of the range extender system, ensure that the power battery SOC balance is within a reasonable range and the NVH performance of the whole vehicle is improved; for high energy recovery conditions, it is determined that the whole vehicle is in a charging state and a braking state for a duration greater than a predetermined time, and fuzzy processing is performed on key parameters such as the power battery SOC, power battery current, power battery voltage, drive motor speed, and drive motor torque. Based on the fuzzy factor, the state of the range extender system in the entire vehicle is judged, so as to accurately control the start and stop of the range extender system to ensure the optimization of the NVH performance of the whole vehicle.

[0080] Specifically, Figure 1 The system principle framework diagram of the vehicle control method provided in the embodiment of the present application is combined with Figure 1 A detailed introduction to the framework:

[0081] The vehicle controller communicates with the various components of the vehicle through the Controller Area Network (CAN) bus, collects key parameters in real time, and then processes the collected key parameters to determine and adjust the working status of the range extender system.

[0082] Among them, the key parameters include power battery SOC, power battery voltage, power battery current, drive motor speed, drive motor torque, range extender power generation, and range extender operating status.

[0083] Specifically, the power battery SOC, power battery voltage, and power battery current are the key parameters for evaluating the power battery status, predicting the remaining driving distance, and the charging and discharging status of the vehicle. The drive motor speed and drive motor torque are parameters that can determine the braking energy recovery status of the vehicle. The vehicle controller monitors the current power generation of the range extender system, and the power generation power parameter is a key parameter for the intelligent adjustment of the working status of the range extender system. In addition, the vehicle controller monitors the operating status of the range extender system to determine the working status of the range extender system and intelligently adjust the start and stop timing of the range extender system.

[0084] The technical solution of the present application is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0085] It is worth noting that the application fields of the relevant methods, devices, vehicles and storage media involved in the present disclosure are not limited.

[0086] Among them, the execution subject of this application is a vehicle, which can be Figure 1 The vehicle controller shown in .

[0087] Since EREV is in low-speed and high-load operating conditions, the SOC of the power battery may drop rapidly, resulting in excessive discharge of the battery, affecting battery life and vehicle performance. Under high energy recovery conditions such as long downhill slopes, the range extender system generates electricity, causing the power battery SOC to increase, and the drive motor system's braking energy recovery cannot be fully utilized, reducing the vehicle's economy and braking safety.

[0088] Therefore, the embodiments of the present application mainly perform intelligent control on the power generation of the range extender system and the start and shutdown of the range extender system for two extreme operating conditions: low-speed and high-load operating conditions and high energy recovery operating conditions.

[0089] First, the low-speed and high-load operating conditions are explained:

[0090] Figure 2 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 1 ,like Figure 2 As shown, the vehicle control method may include the following steps:

[0091] Step 11: When it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state, first power data of the battery is acquired in real time.

[0092] In this step, when the vehicle is running, the range extender is needed to charge the battery or directly provide power to the motor. When the range extender is in working state and the vehicle battery is in a discharging state, it means that the vehicle is in a low-speed and high-load condition, and the range extender is needed to provide power to the motor drive system, and the real-time power data (i.e., the first power data) in this state is obtained.

[0093] Among them, the real-time power data can be expressed by SOC, which is used to evaluate the remaining energy of the vehicle battery.

[0094] In one possible implementation, if the power battery SOC drops from 55% to 50%, it indicates that the vehicle is currently in a discharging state.

[0095] Step 12: When the first power data of the battery is less than the first power threshold, the first power data is determined as the second power data.

[0096] In this step, the real-time power level of the power battery is less than the threshold and the power battery is in a discharging state, and the working state and power generation power of the range extender need to be adjusted to ensure the performance and safety of the power battery. The power data at the first moment of this state is recorded to provide a basis for the subsequent adjustment of the power generation power of the range extender.

[0097] Among them, the first power threshold is the power battery SOC of 50%.

[0098] In one possible implementation, the range extender system is in a power generation state, but the power battery SOC continues to decrease, indicating that the power battery is currently in a discharge state. At this time, the real-time SOC of the power battery (that is, the first power data) is 30%, which is less than the first power threshold of 50%. The second power data is that the power battery SOC is 30%.

[0099] Step 13: When it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold, the required power generation power of the range extender system is determined according to the real-time difference.

[0100] In this step, the real-time difference is the real-time change between the real-time SOC of the power battery and the second power data. When the real-time difference between the real-time first power data and the second power data is greater than the first difference threshold, it means that the current load change of the power battery is large, and the power generation power of the range extender needs to be adjusted to supplement the power battery to ensure that the power battery maintains good performance.

[0101] The value of the first difference threshold may be 1.

[0102] Optionally, step 13 may be implemented as follows:

[0103] The first step is to determine the first fuzzy factor of the range extender system according to the real-time difference;

[0104] In this step, the fuzzy factor is used to describe the uncertainty or ambiguity in the battery SOC prediction, and the fuzzy factor can be determined according to the range of the SOC change and the pre-set fuzzy rules.

[0105] The fuzzy rule can be set as follows: when the SOC change is between 0 and 10, the fuzzy factor is 1.2 (i.e., a small change in SOC occurs); when the SOC change is between 10 and 20, the fuzzy factor is 1.5 (i.e., a medium change in SOC occurs); and when the SOC change is greater than 20, the fuzzy factor is 1.8 (i.e., a large change in SOC occurs).

[0106] In a possible implementation, the real-time difference is 15, and the fuzzy factor can be determined to be 1.5 according to the fuzzy rule.

[0107] The second step is to determine the required power generation power of the range extender system according to the real-time power generation power of the range extender system and the first fuzzy factor.

[0108] In this step, after obtaining the fuzzy factor, the power generation demand of the range extender system in the current state can be obtained by multiplying the fuzzy factor with the current power generation power of the range extender system, which is used to evaluate whether the range extender can meet the current energy demand and whether the range extender power generation strategy needs to be adjusted.

[0109] In a possible implementation, the fuzzy factor is 1.5, the current power generation of the range extender system is 40 kW, and the required power generation of the range extender system is 40×1.5=60 kW.

[0110] Step 14: Control the vehicle operation according to the required power generation.

[0111] In this step, the range extender operates according to the required power generation to ensure that the vehicle can operate while ensuring the SOC balance of the power battery is within a reasonable range while ensuring the NVH performance of the vehicle.

[0112] The vehicle control method provided in the embodiment of the present application obtains the first power data of the battery in real time when it is detected that the range extender system of the vehicle is in working state and the battery of the vehicle is in discharging state, and then determines the first power data of the battery when it is less than the first power threshold as the second power data, and when it is determined in real time that the real-time difference between the first power data and the second power data is greater than the first difference threshold, determines the required power generation power of the range extender system according to the real-time difference, and finally controls the operation of the vehicle according to the required power generation power. In this technical solution, the required power generation power of the range extender system is adjusted according to the real-time power of the power battery and the power data when the range extender system is in working state, the battery of the vehicle is in discharging state, and is less than the first power threshold, which can effectively maintain the SOC balance of the power battery while improving the NVH performance, thereby improving the economy of the vehicle.

[0113] Based on the above embodiments, Figure 3 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 2 ,like Figure 3 As shown, the vehicle control method may further include the following steps:

[0114] S01, after the vehicle has been running for a first preset time, when it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to a second difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and the vehicle operation is continued to be controlled;

[0115] In this step, after the vehicle runs for more than a first preset time according to the required power generation power, the relationship between the real-time difference between the real-time SOC of the power battery and the second power data and the second difference threshold is determined. If the real-time difference is less than or equal to the second difference threshold, the fuzzy factor is continued to be solved according to the real-time difference and the fuzzy rule to determine the required power generation power of the range extender system, and the vehicle continues to run according to the required power generation power.

[0116] In one possible implementation, the vehicle operates for more than 60 seconds based on the required power generation time, the real-time difference is -5, the second difference threshold is -3, the real-time difference is less than the second difference threshold, and the required power generation power of the range extender system is determined based on the real-time difference.

[0117] S02, repeating step S01 until it is determined in real time that the real-time difference between the first power data and the second power data is greater than a second difference threshold, and determining the required power generation power of the range extender system based on the speed information of the vehicle.

[0118] In this step, after the vehicle runs for more than a first preset time based on the required power generation, if the real-time difference between the power battery's real-time SOC and the second power data is greater than the second difference threshold, it indicates that the vehicle's power battery has partially recovered power, and the current power battery SOC has reached a balance. The required power generation power of the range extender system is determined based on the speed information, so that the vehicle can run stably under the required power, ensuring NVH performance.

[0119] The required power generation power of the range extender system may be determined based on the speed information of the vehicle, or the required power generation power of the range extender system may be limited based on the vehicle speed information.

[0120] In one possible implementation, the vehicle is traveling at a low speed of 20 km / h. The range extender power generation capacity corresponding to the vehicle speed of 20 km / h is 20 kW. The current vehicle power demand is 50 kW, that is, the range extender system power generation capacity is 50 kW to ensure the balance of the power battery SOC.

[0121] The vehicle control method provided in the embodiment of the present application is that after the vehicle has been running for a first preset time, if it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to the second difference threshold, the required power generation power of the range extender system is determined based on the real-time difference, and the vehicle operation is continued to be controlled. If it is determined in real time that the real-time difference between the first power data and the second power data is greater than the second difference threshold, the required power generation power of the range extender system is determined based on the vehicle's speed information. In this technical solution, the relationship between the real-time SOC of the power battery and the second power data is continuously and cyclically determined according to the vehicle's running time, so as to determine the current state of the power battery SOC, dynamically adjust the required power while gradually adjusting the power battery SOC, so as to achieve a balance between the SOC and the NVH performance, thereby achieving coordinated control of the SOC and NVH.

[0122] Secondly, the high energy recovery operating conditions are explained:

[0123] Figure 4 Schematic diagram of the process of the vehicle control method provided in the embodiment of the present application Figure 3 ,like Figure 4 As shown, the vehicle control method may include the following steps:

[0124] Step 31: when it is detected that the range extender system of the vehicle is in an operating state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time, first battery power data of the battery is acquired in real time.

[0125] In this step, when the vehicle's range extender system is in working condition, the whole vehicle is judged to be in charging condition according to the product of the power battery voltage and current, and the whole vehicle is judged to be in braking condition according to the product of the drive motor torque and the drive motor speed, and when the duration is greater than the second preset duration, it indicates that the whole vehicle is in a long downhill condition. The above three conditions are used together to avoid misjudgment as a high energy recovery condition during driving on non-downhill roads.

[0126] If the product of the power battery voltage and current is a positive value, it indicates that the vehicle is in a charging state. If the product of the power battery voltage and current is a negative value, it indicates that the vehicle is in a discharging state. If the product of the power battery voltage and current is 0, it indicates that the vehicle is stationary or in a standby state.

[0127] Specifically, if the product of the drive motor torque and the drive motor speed is a negative value, it means that the motor is applying braking force and the vehicle is in a braking state. If the product of the drive motor torque and the drive motor speed is a positive value, it means that the motor is accelerating and the vehicle is in a driving state. If the product of the drive motor torque and the drive motor speed is 0, it means that the vehicle is stationary or in a standby state.

[0128] Step 32: When the first power data is greater than the second power threshold, determine a second fuzzy factor of the actual output power of the motor of the vehicle, a third fuzzy factor of the charging power of the battery, and a fourth fuzzy factor of the capacitor power state of the battery.

[0129] In this step, when the real-time SOC of the power battery is greater than the second power threshold, the second fuzzy factor of the actual output power of the motor is obtained according to the product of the power battery voltage and the power battery current, which is named W1, the third fuzzy factor of the charging power of the battery is obtained according to the product of the driving motor torque and the speed, which is named W2, and the fourth fuzzy factor of the capacitance state of the battery is obtained according to the power battery SOC, which is named W3.

[0130] Among them, the second fuzzy factor W1 is obtained by multiplying the product of the power battery voltage and the power battery current by 1000, and the third fuzzy factor W2 is obtained by multiplying the product of the drive motor torque and the speed by 9550. In this way, the power of the battery and the motor can be effectively calculated under a unified unit standard.

[0131] In a possible implementation, when the second power threshold is 1 and the first power data is 2, and the first power data is greater than the second power threshold, the value of the fuzzy factor is determined according to the key parameter.

[0132] Step 33: Determine the working state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor.

[0133] In this step, the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor are used to perform fuzzy processing on key parameters such as power battery current, power battery voltage, drive motor speed, drive motor torque, and power battery SOC, in preparation for the subsequent determination of whether the range extender system is in a shutdown state or a startup state.

[0134] Optionally, step 33 may be implemented as follows:

[0135] First, the product of the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor is determined, and then the first power data corresponding to the time when the product is initially greater than 1 is determined as the third power data, and finally, when it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

[0136] In this implementation, the second fuzzy factor W1, the third fuzzy factor W2, and the fourth fuzzy factor W3 are multiplied. If W1*W2*W3 is greater than 1, it means that the SOC value of the power battery at the current moment is large, indicating that the vehicle may be in a high energy recovery condition. The SOC of the power battery when it first enters this condition is determined as the third power data. If the difference between the real-time SOC data of the power battery and the third power data is greater than the third difference threshold, it indicates that the power battery state may exceed the safe charging range, and the vehicle controller determines that the range extender system is in a shutdown state.

[0137] Among them, high energy recovery conditions refer to the process of converting the kinetic energy generated by the vehicle's movement into electrical energy through braking, deceleration or other means, and feeding it back to the battery or power system.

[0138] In a possible implementation, the third difference threshold is 1, W1*W2*W3=5, the current power data is recorded as 55, which is the third power data, and the first power data is 58, then the operating state of the range extender system is limited to shutdown.

[0139] Step 34: Control the operation of the vehicle according to the working status of the range extender system.

[0140] In this step, the running state of the vehicle is controlled according to the shutdown state or the startup state of the range extender system.

[0141] Specifically, step 34 is implemented as follows:

[0142] When it is determined in real time that the real-time difference between the first power data and the third power data is less than or equal to the third difference threshold, the current first power data is re-determined as the third power data, until it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

[0143] Under this implementation, when the real-time difference between the real-time SOC value of the power battery and the third power data is less than or equal to the third difference threshold, it indicates that the power battery SOC adjustment has not reached a balanced state, and the power battery SOC needs to be adjusted in a recycle manner until the real-time difference between the real-time SOC value of the power battery and the third power data is greater than the third difference threshold (that is, the power battery SOC reaches a balanced state), and the operating state of the range extender system is determined to be shutdown.

[0144] Among them, determining that the working state of the range extender system is shutdown may also specifically be adjusting the working state of the range extender system to shutdown.

[0145] Specifically, step 34 may also be implemented as follows:

[0146] When the working state of the range extender system is shutdown, when it is determined in real time that the real-time difference between the first power data and the third power data is less than the fourth difference threshold, the required power generation power of the range extender system is determined based on the speed information of the vehicle.

[0147] Under this implementation, when the working state of the range extender system is shutdown, on the one hand, the battery can be protected from overcharging, and on the other hand, energy efficiency can be optimized, energy management can be adjusted to reduce invalid energy loss. When the real-time difference between the power battery SOC and the third power data is less than the fourth difference threshold, it means that the high energy recovery condition has ended, the range extender is started, and the required power generation power of the range extender system is determined according to the vehicle speed information.

[0148] Determining the required power generation power of the range extender system may specifically be adjusting the power generation power of the range extender system.

[0149] In a possible implementation, the value of the fourth difference threshold is -3, the first power data is 50, the third power data is 55, and the real-time difference is -5 which is less than -3, then the power generation power of the range extender system is adjusted.

[0150] The vehicle control method provided by the embodiment of the present application, when it is detected that the range extender system of the vehicle is in a working state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset duration, the first power data of the battery is acquired in real time. When the first power data is greater than a second power threshold, the second fuzzy factor of the actual output power of the motor of the vehicle, the third fuzzy factor of the charging power of the battery, and the fourth fuzzy factor of the capacitance power state of the battery are determined. Then, according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor, the working state of the range extender system is determined. Finally, according to the working state of the range extender system, the vehicle operation is controlled. In this technical solution, a long downhill condition recognition method based on multiple parameters is proposed, and for high energy recovery conditions such as long downhill, a start-stop strategy for the range extender system is proposed, comprehensively considering the power battery SOC, energy recovery efficiency, and vehicle braking requirements, to achieve the optimization of braking safety and vehicle economy.

[0151] In a possible implementation manner, Figure 5 is the flow schematic of the vehicle control method provided by the embodiment of the present application Figure 4 , combined with Figure 5 to specifically introduce this implementation:

[0152] Step 1, start.

[0153] Step 2, whether the range extender system is in a working state.

[0154] In this step, if the range extender system is in a working state, then execute Step 3.

[0155] Step 3, whether the whole vehicle is in a discharging state.

[0156] In this step, if the whole vehicle is in a discharging state, then execute Step 4. If the whole vehicle is not in a discharging state, then execute Step 12.

[0157] Step 4, the power battery SOC < S1.

[0158] In this step, if the power battery SOC < S1, then execute Step 5. If the power battery SOC ≥ S1, then execute Step 3.

[0159] Step 5, take the current moment SOC of the power battery as S2.

[0160] Step 6, the difference ΔS between the real-time SOC of the power battery and S2 > ΔS1.

[0161] In this step, if the difference ΔS between the real-time SOC of the power battery and S2 > ΔS1, then execute Step 7. If the difference ΔS between the real-time SOC of the power battery and S2 ≤ ΔS1, then execute Step 4.

[0162] Step 7: The vehicle controller obtains the fuzzy P based on ΔS.

[0163] Step 8: Multiply the current power generation power of the range extender system by the fuzzy P value to output the power generation demand value of the range extender system.

[0164] Step 9: The range extender system generates power according to demand and operates for time > t1.

[0165] In this step, if the range extender system operates according to the required power generation time>t1, then execute step 10. If the range extender system operates according to the required power generation time≤t1, then execute step 7.

[0166] Step 10. The difference between the power battery SOC and S2 is ΔS>ΔS2.

[0167] In this step, if the difference between the power battery SOC and S2 is ΔS>ΔS2, then execute step 11. If the difference between the power battery SOC and S2 is ΔS≤ΔS2, then execute step 7.

[0168] Step 11: The range extender system generates electricity and operates at the optimal power according to the NVH performance of the vehicle.

[0169] Step 12: The vehicle is in a charging state and the drive motor system is in a charging state and the duration is > t2.

[0170] In this step, if the vehicle is in the charging state, the drive motor system is in the charging state and the duration is greater than t2, then execute step 13. Otherwise, execute step 2.

[0171] Step 13. Power battery SOC>S3.

[0172] In this step, if the power battery SOC>S3, execute step 14. If the power battery SOC≤S3, execute step 2.

[0173] Step 14. The vehicle controller sets the weighting factors of the three key parameters, namely the actual output power of the drive motor, the charging power of the power battery, and the SOC of the power battery, to W1, W2, and W3 respectively.

[0174] Step 15. W1*W2*W3>1.

[0175] In this step, if W1*W2*W3>1, execute step 16. If W1*W2*W3≤1, execute step 14.

[0176] Step 16: Take the current SOC of the power battery as S4.

[0177] Step 17. Real-time SOC of power battery - S4>ΔS3.

[0178] In this step, if the real-time SOC-S4 of the power battery is greater than ΔS3, then execute step 18. If the real-time SOC-S4 of the power battery is less than or equal to ΔS3, then execute step 16.

[0179] Step 18: Shut down the range extender system.

[0180] Step 19: Real-time SOC of the power battery: S4-S4<ΔS4.

[0181] In this step, if the real-time SOC-S4 of the power battery is less than ΔS4, then execute step 11. If the real-time SOC-S4 of the power battery is greater than or equal to ΔS4, then execute step 18.

[0182] Step 20. End.

[0183] In this implementation, multiple parameters such as the power battery SOC, vehicle power demand, and range extender system power generation are comprehensively considered. The fuzzy logic framework is used to achieve intelligent optimization of the range extender system power generation and the start and stop timing of the range extender system to adapt to complex and changeable operating conditions, achieving the following technical effects:

[0184] (1) Optimizing the SOC balance of power batteries: Based on the fuzzy control method of multiple parameters such as the power battery SOC, vehicle power demand, and range extender system power generation, the range extender system power generation can be intelligently adjusted to effectively maintain the power battery SOC within a reasonable range, avoid overcharging or over-discharging, and extend battery life.

[0185] (2) Improved NVH performance: The range extender system power generation is adjusted in real time according to the change in the power battery SOC and the current power generation of the range extender system to control vehicle operation, avoiding problems such as frequent load changes and transient load increases in the range extender system, and optimizing the NVH performance of the entire vehicle.

[0186] (3) Comprehensive improvement of braking safety and vehicle economy: The power generation of the range extender system is adjusted based on multiple parameters such as the charging status of the vehicle's power battery, the braking status of the drive motor, and the power battery SOC. The fuzzy control method is used to achieve intelligent optimization of the power generation of the range extender system and the start and stop timing of the range extender system to adapt to complex and changeable operating conditions.

[0187] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0188] Figure 6 A schematic diagram of the structure of the vehicle control device provided in the embodiment of the present application Figure 1 .like Figure 6 As shown, the device comprises:

[0189] An acquisition module 61 is used to acquire first power data of the battery in real time when it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state;

[0190] A first determining module 62, configured to determine the first power data of the battery as second power data when the first power data of the battery is less than a first power threshold;

[0191] A second determination module 63 is used to determine the required power generation power of the range extender system according to the real-time difference when it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold;

[0192] The control module 64 is used to generate power according to demand and control the operation of the vehicle.

[0193] In a possible implementation manner, the control module 64 is further configured to:

[0194] S01, after the vehicle has been running for a first preset time, when it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to a second difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and the vehicle operation is continued to be controlled;

[0195] S02, repeating step S01 until it is determined in real time that the real-time difference between the first power data and the second power data is greater than a second difference threshold, and determining the required power generation power of the range extender system based on the speed information of the vehicle.

[0196] In a possible implementation manner, the second determination module 63 determines the required power generation power of the range extender system according to the real-time difference, specifically for:

[0197] Determining a first fuzzy factor of the range extender system according to the real-time difference;

[0198] The required power generation power of the range extender system is determined according to the real-time power generation power of the range extender system and the first fuzzy factor.

[0199] Figure 7 A schematic diagram of the structure of the vehicle control device provided in the embodiment of the present application Figure 2 .like Figure 7 As shown, the device comprises:

[0200] An acquisition module 71 is used to acquire first battery power data in real time when it is detected that the range extender system of the vehicle is in a working state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time length;

[0201] A first determination module 72, configured to determine a second fuzzy factor of an actual output power of a motor of the vehicle, a third fuzzy factor of a charging power of a battery, and a fourth fuzzy factor of a capacitor charge state of the battery when the first charge data is greater than a second charge threshold;

[0202] The second determination module 73 is used to determine the working state of the range extender system according to the second fuzzy factor, the third fuzzy factor and the fourth fuzzy factor.

[0203] The control module 74 is used to control the vehicle according to the working status of the range extender system.

[0204] In a possible implementation manner, the second determining module 73 is specifically configured to:

[0205] determining a product of the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor;

[0206] Determine the first electric quantity data corresponding to when the product is greater than 1 for the first time as the third electric quantity data;

[0207] When it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, it is determined that the working state of the range extender system is shutdown.

[0208] In a possible implementation manner, the control module 74 is further configured to:

[0209] When it is determined in real time that the real-time difference between the first power data and the third power data is less than or equal to the third difference threshold, the current first power data is re-determined as the third power data, until it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

[0210] In a possible implementation manner, the control module 74 is further configured to:

[0211] When the working state of the range extender system is shutdown, when it is determined in real time that the real-time difference between the first power data and the third power data is less than the fourth difference threshold, the required power generation power of the range extender system is determined based on the speed information of the vehicle.

[0212] The device provided in the embodiments of the present application can be used to execute the determination method in any of the above embodiments. Its implementation principle and technical effects are similar and will not be repeated here.

[0213] It should be noted that it should be understood that the division of the various modules of the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in the form of hardware. In addition, all or part of these modules can be integrated together, or they can be implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0214] Figure 8 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application, such as Figure 8 As shown, the vehicle may include: a processor 81, a memory 82, and computer program instructions stored in the memory 82 and executable on the processor 81. When the processor 81 executes the computer program instructions, the method provided in any of the aforementioned embodiments is implemented.

[0215] Optionally, the above-mentioned components of the vehicle may be connected via a system bus.

[0216] The memory 82 may be a separate storage unit or a storage unit integrated in the processor 81. The number of the processor 81 may be one or more.

[0217] It should be understood that the processor 81 can be a central processing unit (CPU), or other general-purpose processors 81, digital signal processors 81 (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor 81 can be a microprocessor 81 or the processor 81 can also be any conventional processor 81, etc. The steps of the method disclosed in the present application can be directly embodied as being executed by the hardware processor 81, or can be executed by a combination of hardware and software modules in the processor 81.

[0218] The system bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The system bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The memory 82 may include a random access memory 82 (RAM), and may also include a non-volatile memory 82 (NVM), such as at least one disk storage 82.

[0219] All or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The above-mentioned program can be stored in a readable memory 82. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the above-mentioned memory 82 (storage medium) includes: read-only memory 82 (ROM), RAM, flash memory 82, hard disk, solid state hard disk, magnetic tape, floppy disk, optical disc and any combination thereof.

[0220] The vehicle provided in the embodiment of the present application can be used to execute the method provided in any of the above-mentioned method embodiments, and its implementation principles and technical effects are similar, which will not be repeated here.

[0221] An embodiment of the present application provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are executed on a computer, the computer executes the above method.

[0222] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory, electrically erasable programmable read-only memory, erasable programmable read-only memory, programmable read-only memory, read-only memory, magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0223] Optionally, a readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0224] An embodiment of the present application also provides a computer program product, which includes a computer program. The computer program is stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium. When at least one processor executes the computer program, the above method can be implemented.

[0225] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vehicle control method, characterized in that: include: When it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state, first power data of the battery is acquired in real time; When the first power data of the battery is less than the first power threshold, the first power data is determined as the second power data; When it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold, determining the required power generation power of the range extender system according to the real-time difference; The operation of the vehicle is controlled according to the required generated power.

2. The method according to claim 1, characterized in that The method further comprises: S01, after the vehicle has been running for a first preset time, when it is determined in real time that the real-time difference between the first power data and the second power data is less than or equal to a second difference threshold, the required power generation power of the range extender system is determined according to the real-time difference, and the operation of the vehicle is continued; S02, repeating step S01 until it is determined in real time that the real-time difference between the first power data and the second power data is greater than the second difference threshold, and determining the required power generation power of the range extender system based on the speed information of the vehicle.

3. The method according to claim 1 or 2, characterized in that: Determining the required power generation power of the range extender system according to the real-time difference includes: determining a first fuzzy factor of the range extender system according to the real-time difference; The required power generation power of the range extender system is determined according to the real-time power generation power of the range extender system and the first fuzzy factor.

4. A vehicle control method, characterized in that: include: When it is detected that the range extender system of the vehicle is in an operating state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time, first power data of the battery is acquired in real time; When the first power data is greater than a second power threshold, determining a second fuzzy factor of an actual output power of a motor of the vehicle, a third fuzzy factor of a charging power of the battery, and a fourth fuzzy factor of a capacitor power state of the battery; determining an operating state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor; The operation of the vehicle is controlled according to the working state of the range extender system.

5. The method according to claim 4, characterized in that The determining the working state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor includes: determining a product of the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor; Determine the first electric quantity data corresponding to the time when the product is greater than 1 for the first time as the third electric quantity data; When it is determined in real time that the real-time difference between the first power data and the third power data is greater than a third difference threshold, it is determined that the working state of the range extender system is shutdown.

6. The method according to claim 5, characterized in that The method further comprises: When it is determined in real time that the real-time difference between the first power data and the third power data is less than or equal to the third difference threshold, the current first power data is re-determined as the third power data, until it is determined in real time that the real-time difference between the first power data and the third power data is greater than the third difference threshold, the working state of the range extender system is determined to be shutdown.

7. The method according to any one of claims 4 to 6, characterized in that: The method further comprises: When the working state of the range extender system is shutdown, when it is determined in real time that the real-time difference between the first power data and the third power data is less than a fourth difference threshold, the required power generation power of the range extender system is determined based on the speed information of the vehicle.

8. A vehicle control device, characterized in that: include: an acquisition module, configured to acquire first power data of the battery in real time when it is detected that the range extender system of the vehicle is in an operating state and the battery of the vehicle is in a discharging state; A first determining module, configured to determine the first power data of the battery as second power data when the first power data of the battery is less than a first power threshold; a second determination module, configured to determine the required power generation power of the range extender system according to the real-time difference between the first power data and the second power data when it is determined in real time that the real-time difference between the first power data and the second power data is greater than a first difference threshold; A control module is used to generate power according to the demand and control the operation of the vehicle.

9. A vehicle control device, characterized in that: include: an acquisition module, configured to acquire first power data of the battery in real time when it is detected that the range extender system of the vehicle is in an operating state, the battery of the vehicle is in a charging state, and the vehicle is in a braking state for a duration greater than a second preset time length; A first determination module, configured to determine, when the first power data is greater than a second power threshold, a second fuzzy factor of an actual output power of the motor of the vehicle, a third fuzzy factor of a charging power of the battery, and a fourth fuzzy factor of a capacitor power state of the battery; a second determination module, configured to determine a working state of the range extender system according to the second fuzzy factor, the third fuzzy factor, and the fourth fuzzy factor; A control module is used to control the vehicle according to the working state of the range extender system.

10. A vehicle, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

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