Control method and apparatus for hybrid vehicle, hybrid vehicle and medium

Abstract

A control method and apparatus for a hybrid vehicle, a hybrid vehicle, and a medium. The method is applied to a vehicle, and the method comprises: collecting environment data and vehicle data of a hybrid vehicle at the current operating condition; according to the vehicle data and the environment data, determining a target state of charge corresponding to the current operating condition; and, according to the target state of charge, controlling a power battery of the hybrid vehicle to be discharged or charged.

Description

Hybrid electric vehicle control method, device, hybrid electric vehicle and medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311269517.6 filed on September 27, 2023, entitled “Control method, device, hybrid vehicle and medium for hybrid vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of vehicles, and more specifically, to a control method and device for a hybrid electric vehicle, a hybrid electric vehicle, and a medium in the field of vehicles. Background Art

[0004] Traditional energy sources like oil and natural gas are non-renewable and incompatible with sustainable development. As for the automotive industry, countries around the world are increasingly prioritizing the development of new energy vehicles. Hybrid vehicles, based on traditional power, utilize a hybrid system to achieve dual fuel and electric power, reducing fuel consumption and improving drivability. Hybrid vehicles are a major trend in the current automotive industry. By adding a hybrid system, they combine traditional fuel and electric power to enhance vehicle performance. The engine can be fueled with petroleum fuel, and the battery can be charged, providing both power and comfort, enhancing the user experience.

[0005] Hybrid vehicles retain engine power and add electric assist, enabling pure electric, pure gasoline, and dual-power hybrid driving. They can also switch driving modes based on external conditions. The addition of a battery system makes charging and discharging a crucial control logic. Controlling the battery's target state of charge (SOC) under different operating conditions is crucial to achieving optimal mode transitions and overall vehicle comfort.

[0006] The current mainstream hybrid vehicle drive modes include pure electric, series, and direct drive (parallel-parallel). Different power drive modes can be selected based on different conditions, and the mode can be switched at the right time. Due to the increase in battery systems, the vehicle control system needs to control the battery's target state of charge to meet the power battery usage requirements under different operating conditions. The current hybrid vehicle target state of charge control method cannot effectively meet the power battery usage requirements under various operating conditions, cannot better utilize the battery's available space, and is not conducive to improving vehicle range.

[0007] Summary of the Invention

[0008] The present application provides a control method, device, hybrid vehicle and medium for a hybrid vehicle. The method can adjust the target state of charge based on the current operating conditions of the hybrid vehicle and the vehicle data and environmental data of the operating conditions, so that the power battery can be discharged or charged according to the target state of charge to meet the use requirements of the power battery under the current operating conditions, realize dynamic and comprehensive control of the target state of charge, better utilize the available battery space, increase the cruising range, and improve the driving performance and vehicle experience.

[0009] In a first aspect, a control method, device, hybrid vehicle and medium for a hybrid vehicle are provided. The method includes: collecting vehicle data and environmental data of the hybrid vehicle in its current operating condition; determining a target state of charge corresponding to the current operating condition based on the vehicle data and environmental data; and controlling the discharge or charging of the power battery of the hybrid vehicle according to the target state of charge.

[0010] Through the above technical solution, the target state of charge can be adjusted based on the current operating conditions of the hybrid vehicle and the vehicle data and environmental data of the operating conditions. By taking into account various operating conditions and the vehicle data and environmental data corresponding to the operating conditions, the power battery can be discharged or charged according to the target state of charge to meet the use requirements of the power battery under the current operating conditions, realize dynamic and comprehensive control of the target state of charge, better utilize the available battery space, increase the cruising range, and improve driving performance and vehicle experience.

[0011] In combination with the first aspect, in some possible implementations, the target state of charge corresponding to the current operating condition is determined based on vehicle data and environmental data, including: identifying the vehicle speed, battery temperature, accelerator pedal opening, system mode and driving mode in the vehicle data, and the ambient temperature and atmospheric pressure in the environmental data; determining the basic target state of charge based on the vehicle speed, ambient temperature and battery temperature, and determining a correction value of the target state of charge based on one or more of the vehicle speed, accelerator pedal opening, atmospheric pressure, system mode and driving mode; correcting the basic target state of charge based on the correction value to obtain the target state of charge corresponding to the current operating condition.

[0012] Through the above technical solution, the correction value of the basic target state of charge can be determined according to different working conditions and vehicle data and environmental data under different working conditions. The basic target state of charge can be corrected based on the correction value to obtain the target state of charge corresponding to the current working condition. Various conditions are taken into comprehensive consideration to avoid the impracticality of special working conditions and realize dynamic adjustment of the target state of charge.

[0013] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, before controlling the discharge or charging of the power battery of the hybrid vehicle according to the target state of charge, it also includes: judging whether the hybrid vehicle meets the preset downward condition of the target state of charge; if the hybrid vehicle meets the preset downward condition, controlling the hybrid vehicle to enter the target state of charge downward mode, and identifying the vehicle speed, battery temperature in the vehicle data and the ambient temperature in the environmental data; determining the downward value of the target state of charge based on one or more of the vehicle speed, battery temperature and ambient temperature, and correcting the target state of charge based on the downward value.

[0014] Through the above technical solution, when the hybrid vehicle meets the preset lowering conditions of the target state of charge, the hybrid vehicle can be controlled to enter the lowering mode, continuously lowering the target state of charge, utilizing the available battery space to a greater extent and increasing the cruising range.

[0015] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the preset downward conditions include the following conditions: the total mileage of the hybrid vehicle is less than the first preset mileage, the system mode is the first preset power mode, the driving mode is the first preset driving mode, and the actual state of charge of the power battery is greater than the first preset state of charge.

[0016] Through the above technical solution, the hybrid electric vehicle can be controlled to enter the downward exploration mode when the preset downward exploration conditions are met, so that the target state of charge can be adjusted subsequently.

[0017] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, after controlling the hybrid vehicle to enter the target state of charge downward exploration mode, it also includes: judging whether the hybrid vehicle meets the preset downward exploration exit conditions; if the hybrid vehicle meets the preset downward exploration exit conditions, controlling the hybrid vehicle to exit the target state of charge downward exploration mode and ending the correction of the target state of charge.

[0018] Through the above technical solution, the hybrid vehicle can be controlled to exit the downward dive mode when the hybrid vehicle meets the preset downward dive exit condition of the target state of charge.

[0019] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the preset downward exit condition includes any one of the following conditions: the system mode is the second preset power mode, the driving mode is the second preset driving mode, the actual state of charge of the power battery is less than the second preset state of charge, the battery temperature of the power battery is less than the preset temperature, the second preset mileage is traveled in the power reserve mode, and the vehicle speed is greater than the preset speed and maintained for a preset time.

[0020] With the above technical solution, the hybrid vehicle can exit the downward dive mode when any one of the preset downward dive exit conditions is met.

[0021] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, before controlling the discharge or charging of the power battery according to the target state of charge, it also includes: detecting whether the current power mode of the hybrid vehicle is the power reserve mode; when it is detected that the current power mode is the power reserve mode, obtaining the set value of the target state of charge set by the user; and correcting the target state of charge based on the set value.

[0022] Through the above technical solution, when the hybrid electric vehicle is in the power reserve mode, the target state of charge can be corrected based on the set value of the target state of charge set by the user to meet the user's needs.

[0023] In a second aspect, a control device for a hybrid vehicle is provided, which includes: an acquisition module for collecting vehicle data and environmental data of the hybrid vehicle in its current operating conditions; a determination module for determining a target state of charge corresponding to the current operating conditions based on the vehicle data and environmental data; and a control module for controlling the discharge or charging of the power battery of the hybrid vehicle according to the target state of charge.

[0024] In combination with the second aspect, in some possible implementations, the determination module is used to: identify the vehicle speed, battery temperature, accelerator pedal opening, system mode and driving mode in the vehicle data, and the ambient temperature and atmospheric pressure in the environmental data; determine the basic target state of charge based on the vehicle speed, ambient temperature and battery temperature, and determine a correction value of the target state of charge based on one or more of the vehicle speed, accelerator pedal opening, atmospheric pressure, system mode and driving mode; correct the basic target state of charge based on the correction value to obtain the target state of charge corresponding to the current operating conditions.

[0025] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the control device of the hybrid vehicle also includes: a first judgment module, which is used to judge whether the hybrid vehicle meets the preset downward condition of the target state of charge before controlling the discharge or charging of the power battery of the hybrid vehicle according to the target state of charge; if the hybrid vehicle meets the preset downward condition, the hybrid vehicle is controlled to enter the target state of charge downward mode, and the vehicle speed, battery temperature in the vehicle data and the ambient temperature in the environmental data are identified; based on one or more of the vehicle speed, battery temperature and ambient temperature, a downward value of the target state of charge is determined, and the target state of charge is corrected based on the downward value.

[0026] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the preset downward conditions include the following conditions: the total mileage of the hybrid vehicle is less than the first preset mileage, the system mode is the first preset power mode, the driving mode is the first preset driving mode, and the actual state of charge of the power battery is greater than the first preset state of charge.

[0027] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the control device of the hybrid vehicle also includes: a second judgment module, which is used to judge whether the hybrid vehicle meets the preset downward exploration exit condition after controlling the hybrid vehicle to enter the target state of charge downward exploration mode; if the hybrid vehicle meets the preset downward exploration exit condition, the hybrid vehicle is controlled to exit the target state of charge downward exploration mode and the correction of the target state of charge is ended.

[0028] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the preset downward exit condition includes any one of the following conditions: the system mode is the second preset power mode, the driving mode is the second preset driving mode, the actual state of charge of the power battery is less than the second preset state of charge, the battery temperature of the power battery is less than the preset temperature, the second preset mileage is driven in the power reserve mode, and the vehicle speed is greater than the preset speed and maintained for a preset time.

[0029] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the control device of the hybrid vehicle also includes: a detection module, which is used to detect whether the current power mode of the hybrid vehicle is a power reserve mode before controlling the discharge or charging of the power battery according to the target state of charge; when it is detected that the current power mode is the power reserve mode, obtaining a set value of the target state of charge set by the user; and correcting the target state of charge based on the set value.

[0030] In a third aspect, a hybrid vehicle is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method according to the first aspect or any possible implementation of the first aspect.

[0031] In a fourth aspect, a computer-readable storage medium is provided, which stores a computer program code. When the computer program code runs on a computer, the computer executes the method in the above-mentioned first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a flow chart of a control method for a hybrid vehicle according to an embodiment of the present application;

[0033] FIG2 is a control logic diagram of a downward probe mode according to an embodiment of the present application;

[0034] FIG3 is a logic diagram of dynamic control of target state of charge according to an embodiment of the present application;

[0035] FIG4 is a schematic structural diagram of a control device for a hybrid vehicle according to an embodiment of the present application.

[0036] Description of reference numerals: control device 100 of hybrid vehicle, acquisition module 100 , determination module 200 , control module 300 . DETAILED DESCRIPTION

[0037] Before explaining the control method of the hybrid vehicle of the present application, it should be noted that the current mainstream hybrid vehicle driving modes mainly include pure electric, series and direct drive. Different power drives can be performed according to different selection conditions, and the modes can be switched in time.

[0038] Due to the increase in battery systems, the vehicle control system needs to control the target state of charge of the battery. Previous hybrid models were unable to better adjust the target state of charge according to various usage scenarios, and there were fewer factors to consider. When the vehicle was in power reserve mode, there was only a single target state of charge value, and dynamic adjustment could not be achieved. At the same time, when the vehicle was in pure electric mode for a long time, the target state of charge was the same as in hybrid mode, which could not better utilize the available space of the battery and was not conducive to improving the vehicle's pure electric endurance. Therefore, it is necessary to dynamically control the target state of charge of the hybrid vehicle and control the discharge or charging of the hybrid vehicle's power battery according to the target state of charge.

[0039] FIG1 is a schematic flow chart of a control method for a hybrid vehicle provided in an embodiment of the present application.

[0040] Exemplarily, as shown in FIG1 , the method includes the following steps:

[0041] In step S101 , vehicle data and environmental data of the hybrid vehicle in its current operating state are collected.

[0042] Among them, the current operating conditions refer to the operating conditions of the hybrid vehicle under the current operating state and environmental conditions; vehicle data include vehicle speed, battery temperature, accelerator pedal opening, system mode (including pure electric mode, pure oil mode, hybrid mode, power reserve mode, etc.) and driving mode (including sports mode, economic mode, standard mode, etc.); environmental data includes ambient temperature, atmospheric pressure, etc.

[0043] In step S102 , a target state of charge corresponding to the current operating condition is determined based on vehicle data and environmental data.

[0044] It can be understood that the embodiment of the present application can determine the target state of charge corresponding to the current operating condition based on the vehicle data and ambient temperature under the current operating condition of the hybrid vehicle, comprehensively consider multiple operating conditions and various conditions, determine different target states of charge under different operating conditions, avoid the impracticality of special operating conditions, utilize the available battery space to a greater extent, and increase the cruising range, so that the target state of charge can be dynamically adjusted according to the operating condition, and the battery availability can be fully utilized.

[0045] In an embodiment of the present application, a target state of charge corresponding to the current operating condition is determined based on vehicle data and environmental data, including: identifying the vehicle speed, battery temperature, accelerator pedal opening, system mode and driving mode in the vehicle data, and the ambient temperature and atmospheric pressure in the environmental data; determining a basic target state of charge based on the vehicle speed, ambient temperature and battery temperature, and determining a correction value of the target state of charge based on one or more of the vehicle speed, accelerator pedal opening, atmospheric pressure, system mode and driving mode; and correcting the basic target state of charge based on the correction value to obtain the target state of charge corresponding to the current operating condition.

[0046] It can be understood that the embodiments of the present application can determine the basic target state of charge based on vehicle speed, ambient temperature and battery temperature, determine a correction value of the target state of charge based on one or more of vehicle speed, accelerator pedal opening, atmospheric pressure, system mode and driving mode, correct the basic target state of charge according to the correction value, and obtain the target state of charge corresponding to the current operating condition. Taking multiple conditions into comprehensive consideration, the target state of charge of the hybrid vehicle can be dynamically adjusted according to the operating condition, vehicle data and environmental data, thereby realizing intelligent adjustment.

[0047] The target state of charge acquisition method of the embodiment of the present application may include:

[0048] (1) Setting the target state of charge calibration table A based on vehicle speed and battery temperature, and setting the target state of charge calibration table B based on vehicle speed and ambient temperature. The larger value of the two is used as the basic table for setting the target state of charge, maintaining a high target state of charge to meet the target state of charge requirements in different environments, that is, the basic target state of charge can be determined based on the basic table;

[0049] In the embodiment of the present application, the target SOC is set based on vehicle speed, battery temperature, and ambient temperature. When the battery temperature or ambient temperature is low, the target value is increased to avoid battery loss. The purpose of considering vehicle speed is to lower the target SOC at low speeds and to stop the engine as much as possible. For example, when the temperature is low, the hybrid vehicle is left overnight, and the ambient temperature and battery temperature are not much different. However, after the driver has driven for a while, the battery temperature will rise. According to the ambient temperature table, the target SOC will not change much. However, if the battery temperature rises too much, the target SOC will drop significantly. At this time, if the hybrid vehicle is stopped and stagnated overnight, the battery temperature will drop, but the target SOC is still low and may not meet the requirements for use at low temperatures. Therefore, the larger of the two can maintain a high target SOC. This avoids the battery SOC being too low due to the large difference between the battery temperature and the ambient temperature, which does not affect the purpose of use.

[0050] (2) Setting a target state of charge calibration table C based on vehicle speed and accelerator pedal opening, determining a correction value of the target state of charge based on vehicle speed and accelerator pedal opening, and correcting the basic target state of charge based on the correction value. High vehicle speed and high accelerator pedal opening increase the target state of charge, which can better correct the target state of charge according to vehicle speed and accelerator pedal opening, thereby providing more power to the hybrid vehicle and ensuring power performance;

[0051] (3) Setting a target state of charge calibration table D based on atmospheric pressure, determining a correction value for the basic target state of charge based on the atmospheric pressure, and correcting the basic target state of charge based on the correction value. The weaker the atmospheric pressure, the weaker the engine capacity, and the weaker the output power. Therefore, increasing the target state of charge provides more power, fully considering the impact of atmospheric pressure on the target state of charge, and improving the driving experience;

[0052] (4) The target state of charge calibration table E is set based on the system mode and the driving mode, and the correction value of the basic target state of charge is determined based on the system mode and the driving mode. The basic target state of charge is corrected based on the correction value. The target state of charge is different in different modes. Therefore, the different target states of charge required for hybrid vehicles in different modes are taken into consideration to meet the power requirements in different modes and improve the driving experience.

[0053] The correction value can be confirmed through calibration experiments and is not specifically limited here.

[0054] It should be noted that, in actual use, the embodiment of the present application can flexibly combine (2)-(4) to determine the correction value according to the actual working conditions, and correct the basic target state of charge in (1) based on the correction value to obtain the target state of charge. The following will be explained through specific examples, as follows:

[0055] 1. When the vehicle is at a low altitude and is traveling at a high speed and with a large accelerator pedal opening, the vehicle speed and the accelerator pedal opening are the main factors affecting the target state of charge. Therefore, the embodiment of the present application utilizes the above (1) and (2) to obtain the target state of charge, as follows:

[0056] Since the hybrid vehicle requires a lot of power when the vehicle speed is high and the accelerator pedal opening is large, the engine of the hybrid vehicle can operate with the most economical fuel consumption and the best power in most cases. It can not only drive the vehicle smoothly, but also have more energy to generate electricity. Therefore, in this case, the target state of charge can be increased, that is, the correction value is determined according to the vehicle speed and the accelerator pedal opening, and the basic target state of charge in (1) is corrected to obtain the target state of charge, thereby ensuring the power of the hybrid vehicle.

[0057] 2. When the vehicle is at a high altitude and is traveling at a low speed and with a small accelerator pedal opening, atmospheric pressure is the main factor affecting the target state of charge. Therefore, the embodiment of the present application utilizes (1) and (3) above to obtain the target state of charge, as follows:

[0058] In the embodiment of the present application, the target state of charge can be obtained by using the above (1) and (3) in high altitude areas, as follows:

[0059] In high-altitude areas with thin air, the engine intake pressure will decrease, affecting the overall performance of the engine. The engine capacity will be attenuated, and the output power will be weak. Therefore, in plateau environments, that is, places with strong and weak atmospheric pressure, the target state of charge can be increased to retain more electricity to enhance power output, thereby improving the driving experience. That is, the correction value of the basic target state of charge is determined according to the atmospheric pressure, and the basic target state of charge in (1) is corrected based on the correction value to obtain the target state of charge.

[0060] 3. When the vehicle is at a high altitude and is traveling at a high speed and with a large accelerator pedal opening, the vehicle speed, accelerator pedal opening, and atmospheric pressure are the main factors affecting the target state of charge. Therefore, the embodiment of the present application utilizes (1), (2), and (3) above to jointly obtain the target state of charge, as follows:

[0061] Based on the basic target state of charge obtained in (1), the target state of charge can be increased in high altitude areas to retain more power to enhance power output. The correction value of the basic target state of charge is determined according to the atmospheric pressure. In addition, when the vehicle speed is high and the accelerator pedal opening is large, the hybrid vehicle requires a large amount of power, so the target state of charge can be increased. The correction value of the basic target state of charge is determined according to the vehicle speed and the accelerator pedal opening. The final correction value is calculated according to the weights of the atmospheric pressure, vehicle speed and accelerator pedal for the target state of charge and the correction values ​​of the two. The final correction value is used to correct the basic target state of charge to obtain the target state of charge.

[0062] 4. The embodiment of the present application can obtain the target state of charge by using the above (1) and (4) when the hybrid vehicle is in a special mode, such as a snow, mud and sand power mode, as follows:

[0063] Due to the different power requirements in different modes, the power requirements of vehicles in special modes such as snow, mud and sand are large (getting out of trouble in deserts and muddy roads). The higher the target state of charge, the more power can be provided. Therefore, the correction value of the basic target state of charge can be determined based on the system mode and driving mode, and the basic target state of charge in (1) can be corrected based on the correction value to obtain the target state of charge.

[0064] 5. The embodiment of the present application may also simultaneously consider (1), (2), (3), and (4) to obtain the target state of charge, and comprehensively consider multiple conditions such as vehicle speed, battery temperature, ambient temperature, atmospheric pressure, accelerator pedal opening, system mode, and driving mode, so as to achieve dynamic adjustment of the target state of charge of the hybrid vehicle according to the working conditions, vehicle data, and environmental data, thereby realizing intelligent adjustment.

[0065] In step S103 , the power battery of the hybrid vehicle is controlled to discharge or charge according to the target state of charge.

[0066] It can be understood that the embodiments of the present application can control the discharge or charging of the power battery of the hybrid vehicle according to the target state of charge, thereby achieving comprehensive intelligent control of the power battery of the hybrid vehicle and improving driving performance and vehicle experience.

[0067] In an embodiment of the present application, before controlling the discharge or charging of the power battery of a hybrid vehicle according to the target state of charge, it also includes: judging whether the hybrid vehicle meets the preset downward condition of the target state of charge; if the hybrid vehicle meets the preset downward condition, controlling the hybrid vehicle to enter the target state of charge downward mode, and identifying the vehicle speed, battery temperature in the vehicle data and the ambient temperature in the environmental data; determining the downward value of the target state of charge based on one or more of the vehicle speed, battery temperature and ambient temperature, and correcting the target state of charge based on the downward value.

[0068] It can be understood that the embodiments of the present application can control the hybrid vehicle to enter the target state of charge downward mode when the hybrid vehicle meets the preset downward conditions, and determine the downward value of the target state of charge based on one or more of the vehicle speed, battery temperature and ambient temperature of the hybrid vehicle's current operating conditions, correct the target state of charge based on the downward value, continuously lower the target state of charge, utilize the available battery space to a greater extent, and increase the cruising range of the hybrid vehicle.

[0069] The preset downward conditions include the following conditions: the total mileage of the hybrid vehicle is less than the first preset mileage, the system mode is the first preset power mode, the driving mode is the first preset driving mode, and the actual state of charge of the power battery is greater than the first preset state of charge.

[0070] Among them, the first preset mileage can be set according to the specific situation of the hybrid vehicle, for example, it can be set to 150,000 km; the first preset power mode can be a pure electric mode, the first preset driving mode can be a standard mode, and the first preset state of charge can be 94%.

[0071] For example, the logic of activating the preset downward probe mode will be described below with reference to FIG. 2 . As shown in FIG. 2 , activation of the downward probe mode is related to multiple conditions.

[0072] The activation conditions are: the total mileage of the vehicle is less than 150,000 km; the vehicle hybrid system mode is pure electric priority (the vehicle's default mode); the vehicle driving mode is standard (the vehicle's default mode); the actual state of charge of the vehicle battery is greater than 94%. The function is activated when all four conditions are met at the same time.

[0073] In an embodiment of the present application, after controlling the hybrid vehicle to enter the target state of charge deep-dive mode, it also includes: determining whether the hybrid vehicle meets the preset deep-dive exit condition; if the hybrid vehicle meets the preset deep-dive exit condition, controlling the hybrid vehicle to exit the target state of charge deep-dive mode and ending the correction of the target state of charge.

[0074] It can be understood that, in the embodiment of the present application, when the hybrid vehicle meets the preset downward dive exit condition, the hybrid vehicle is controlled to exit the target state of charge downward dive mode and the target state of charge correction is ended.

[0075] The preset downward exit conditions include any one of the following conditions: the system mode is the second preset power mode, the driving mode is the second preset driving mode, the actual state of charge of the power battery is less than the second preset state of charge, the battery temperature of the power battery is less than the preset temperature, the second preset mileage is driven in the power reserve mode, and the vehicle speed is greater than the preset speed and maintained for a preset time.

[0076] Among them, the preset temperature, the second preset mileage, the preset vehicle speed and the preset time can be set according to the specific situation; the second preset driving mode is a driving mode other than the first driving mode, such as pure oil mode, hybrid mode, power reserve mode, etc. The second preset state of charge can be the state of charge at low temperature.

[0077] For example, the exit conditions of the downward mode are related to multiple conditions, including: the vehicle hybrid system mode is no longer pure electric priority; the vehicle driving mode is no longer standard; based on the battery state of charge and temperature lookup table, the exit conditions are met (based on the downward function exit principle at low temperatures at the target state of charge); the vehicle travels 80km after the CD / CS mode is converted to CS; the vehicle speed is greater than 90kph for more than 600s (the vehicle speed is less than 90kph and the time is 30s to recover). The function exits when any of the above five conditions are met.

[0078] It should be noted that based on battery protection principles and vehicle drivability considerations, a lower limit for the vehicle's battery state of charge is set to prevent issues such as locking the battery pack due to a complete discharge, as well as poor drivability in hybrid mode at low battery levels. If a hybrid vehicle user is identified as continuously driving in pure electric mode after fully charging, the target state of charge is lowered to maximize the battery's available capacity, thereby increasing the pure electric range.

[0079] In an embodiment of the present application, before controlling the discharge or charging of the power battery according to the target state of charge, it also includes: detecting whether the current power mode of the hybrid vehicle is the power reserve mode; when it is detected that the current power mode is the power reserve mode, obtaining the set value of the target state of charge set by the user; and correcting the target state of charge based on the set value.

[0080] It can be understood that in the embodiment of the present application, when the current power mode of the hybrid vehicle is in the power reserve mode, the user can set the target state of charge value by himself, and correct the target state of charge based on the set value to meet the user's vehicle use needs.

[0081] The power reserve mode can be divided into two types: forced power reserve mode and intelligent power reserve mode. The influencing factors are the user-set instrument target state of charge setting value and vehicle speed. The larger value of the target state of charge and the basic target state of charge is taken to output the target state of charge.

[0082] In addition, in the embodiment of the present application, the user can also set a target state of charge value (i.e., a maximum target state of charge value) based on the battery characteristics to avoid fully charging the battery and shortening its life.

[0083] In summary, the present application considers multiple working conditions for the setting of the target state of charge to avoid the impracticality of special working conditions, and at the same time adds a power reserve mode that can manually adjust the target state of charge setting, as well as a pure electric driving target state of charge detection function to increase the pure electric range. Specifically, the vehicle speed, ambient temperature, battery temperature, driving mode, atmospheric pressure and other conditions are taken into consideration, among which; in the power reserve mode, the target state of charge is set to be dynamically adjusted through instrument selection; at the same time, the driver's vehicle use needs are identified; when the hybrid vehicle is always in pure electric mode, the target state of charge is detected, and the available battery space is utilized to a greater extent, thereby increasing the pure electric range, realizing dynamic control of the target state of charge of the hybrid vehicle, and improving the hybrid vehicle driving experience.

[0084] The target state of charge dynamic control logic of this application will be described below in conjunction with FIG3 , specifically as follows:

[0085] (1) A calibration table based on vehicle speed, ambient temperature, and battery temperature, with the larger of the two used as the base table for setting the target state of charge (denoted as target SOC in the figure);

[0086] (2) The basic table is modified based on vehicle speed and accelerator pedal opening. At high vehicle speed and large accelerator pedal opening, the target state of charge is increased.

[0087] (3) Correct the basic table based on atmospheric pressure. The weaker the atmospheric pressure, the higher the target state of charge.

[0088] (4) Modify the basic table based on the system mode and driving mode, and the target state of charge is different in different modes;

[0089] (5) When the target state of charge detection function is activated, the target state of charge is reduced to varying degrees based on vehicle speed, ambient temperature, and battery temperature, thereby increasing the pure electric range;

[0090] (6) In the power reserve mode, two modes are set: forced power reserve and intelligent power reserve. The influencing factors are the instrument state of charge setting value and vehicle speed. The larger value of the hybrid vehicle basic target state of charge is output as the target value;

[0091] (7) Based on the battery characteristics, the maximum target state of charge value is set to avoid the battery being fully charged, thereby effectively improving the service life of the power battery.

[0092] According to the control method of the hybrid vehicle proposed in the embodiment of the present application, the target state of charge can be adjusted based on the current operating conditions of the hybrid vehicle and the vehicle data and environmental data of the operating conditions, and various operating conditions and the vehicle data and environmental data corresponding to the operating conditions are comprehensively taken into consideration, so that the power battery can be discharged or charged according to the target state of charge to meet the use requirements of the power battery under the current operating conditions, realize dynamic and comprehensive control of the target state of charge, better utilize the available battery space, increase the cruising range, and improve the driving performance and vehicle experience.

[0093] FIG4 is a schematic structural diagram of a control device for a hybrid vehicle provided in an embodiment of the present application.

[0094] Exemplarily, as shown in FIG. 4 , the apparatus 10 may include: a collection module 100 , a determination module 200 and a control module 300 .

[0095] Acquisition module 100: used to collect vehicle data and environmental data of the hybrid vehicle in its current operating condition;

[0096] Determination module 200: used to determine the target state of charge corresponding to the current operating condition based on vehicle data and environmental data;

[0097] Control module 300: used to control the discharge or charge of the power battery of the hybrid vehicle according to the target state of charge.

[0098] In an embodiment of the present application, the determination module 200 is used to: identify the vehicle speed, battery temperature, accelerator pedal opening, system mode and driving mode in the vehicle data, and the ambient temperature and atmospheric pressure in the environmental data; determine the basic target state of charge based on the vehicle speed, ambient temperature and battery temperature, and determine a correction value of the target state of charge based on one or more of the vehicle speed, accelerator pedal opening, atmospheric pressure, system mode and driving mode; correct the basic target state of charge based on the correction value to obtain the target state of charge corresponding to the current operating conditions.

[0099] In the embodiment of the present application, the apparatus 10 of the present application further includes: a first judgment module.

[0100] Among them, the first judgment module is used to determine whether the hybrid vehicle meets the preset downward condition of the target state of charge before controlling the hybrid vehicle's power battery to discharge or charge according to the target state of charge; if the hybrid vehicle meets the preset downward condition, the hybrid vehicle is controlled to enter the target state of charge downward mode, and the vehicle speed, battery temperature in the vehicle data and the ambient temperature in the environmental data are identified; based on one or more of the vehicle speed, battery temperature and ambient temperature, a downward value of the target state of charge is determined, and the target state of charge is corrected based on the downward value.

[0101] In an embodiment of the present application, the preset downward conditions include the following conditions: the total mileage of the hybrid vehicle is less than the first preset mileage, the system mode is the first preset power mode, the driving mode is the first preset driving mode, and the actual state of charge of the power battery is greater than the first preset state of charge.

[0102] In the embodiment of the present application, the apparatus 10 of the present application further includes: a second judgment module.

[0103] Among them, the second judgment module is used to determine whether the hybrid vehicle meets the preset downward exploration exit conditions after controlling the hybrid vehicle to enter the target state of charge downward exploration mode; if the hybrid vehicle meets the preset downward exploration exit conditions, the hybrid vehicle is controlled to exit the target state of charge downward exploration mode and end the correction of the target state of charge.

[0104] In an embodiment of the present application, the preset downward exit condition includes any one of the following conditions: the system mode is the second preset power mode, the driving mode is the second preset driving mode, the actual state of charge of the power battery is less than the second preset state of charge, the battery temperature of the power battery is less than the preset temperature, the second preset mileage is driven in the power reserve mode, and the vehicle speed is greater than the preset speed and maintained for a preset time.

[0105] In the embodiment of the present application, the device 10 of the present application further includes: a detection module.

[0106] Among them, the detection module is used to detect whether the current power mode of the hybrid vehicle is the power reserve mode before controlling the discharge or charging of the power battery according to the target state of charge; when it is detected that the current power mode is the power reserve mode, the set value of the target state of charge set by the user is obtained; and the target state of charge is corrected based on the set value.

[0107] According to the control device of the hybrid vehicle proposed in the embodiment of the present application, the target state of charge can be adjusted based on the current operating conditions of the hybrid vehicle and the vehicle data and environmental data of the operating conditions, and multiple operating conditions and the vehicle data and environmental data corresponding to the operating conditions are comprehensively taken into consideration, so that the power battery can be discharged or charged according to the target state of charge to meet the use requirements of the power battery under the current operating conditions, realize dynamic and comprehensive control of the target state of charge, better utilize the available battery space, increase the cruising range, and improve the driving performance and vehicle experience.

[0108] In addition, an embodiment of the present application also protects a hybrid vehicle, which may include a memory and a processor, wherein the memory stores executable program code, and the processor is used to call and execute the executable program code to perform a control method for a hybrid vehicle provided by an embodiment of the present application.

[0109] An embodiment of the present application also provides a computer-readable storage medium, which stores computer program code. When the computer program code runs on a computer, the computer executes the above-mentioned related method steps to implement a control method for a hybrid vehicle provided by the above embodiment.

[0110] Among them, the devices, computer-readable storage media or chips provided in the embodiments of the present application are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0111] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0112] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0113] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A control method for a hybrid vehicle, wherein: The following steps are involved: Collect vehicle data and environmental data of the hybrid vehicle in its current operating conditions; Determining a target state of charge corresponding to the current operating condition according to the vehicle data and the environmental data; The power battery of the hybrid vehicle is controlled to discharge or charge according to the target state of charge.

2. The control method of a hybrid vehicle according to claim 1, wherein: The determining the target state of charge corresponding to the current working condition according to the vehicle data and the environmental data includes: Identify vehicle speed, battery temperature, accelerator pedal opening, system mode and driving mode in the vehicle data, and ambient temperature and atmospheric pressure in the environmental data; determining a basic target state of charge based on the vehicle speed, the ambient temperature, and the battery temperature, and determining a correction value of the target state of charge based on one or more of the vehicle speed, the accelerator pedal opening, the atmospheric pressure, the system mode, and the driving mode; The basic target state of charge is corrected based on the correction value to obtain the target state of charge corresponding to the current operating condition.

3. The control method of a hybrid vehicle according to claim 2, wherein: Before controlling the power battery of the hybrid vehicle to discharge or charge according to the target state of charge, the method further includes: Determining whether the hybrid electric vehicle meets a preset downward condition of a target state of charge; If the hybrid vehicle meets the preset downward exploration condition, the hybrid vehicle is controlled to enter a target state of charge downward exploration mode, and the vehicle speed and battery temperature in the vehicle data and the ambient temperature in the ambient data are identified; A lowering value of a target state of charge is determined based on one or more of the vehicle speed, the battery temperature, and the ambient temperature, and the target state of charge is corrected based on the lowering value.

4. The control method of a hybrid vehicle according to claim 3, wherein: The preset downward conditions include the following conditions: the total mileage of the hybrid vehicle is less than the first preset mileage, the system mode is the first preset power mode, the driving mode is the first preset driving mode, and the actual state of charge of the power battery is greater than the first preset state of charge.

5. The control method of a hybrid vehicle according to claim 3, wherein: After controlling the hybrid electric vehicle to enter the target state of charge exploration mode, the method further includes: Determining whether the hybrid electric vehicle meets a preset downward exit condition; If the hybrid vehicle meets the preset downward dive exit condition, the hybrid vehicle is controlled to exit the target state of charge downward dive mode, and the correction of the target state of charge is terminated.

6. The control method of the hybrid vehicle according to claim 5, wherein: The preset downward exit condition includes any one of the following conditions: the system mode is the second preset power mode, the driving mode is the second preset driving mode, the actual state of charge of the power battery is less than the second preset state of charge, the battery temperature of the power battery is less than the preset temperature, the vehicle travels a second preset mileage in the power reserve mode, and the vehicle speed is greater than the preset speed and maintained for a preset time.

7. The control method of a hybrid vehicle according to claim 1, wherein: Before controlling the power battery to discharge or charge according to the target state of charge, the method further includes: Detecting whether the current power mode of the hybrid vehicle is a power reserve mode; When it is detected that the current power mode is the power reserve mode, obtaining a set value of the target state of charge set by the user; The target state of charge is modified based on the set value.

8. A control device for a hybrid vehicle, wherein: include: A collection module, used to collect vehicle data and environmental data of the hybrid vehicle in the current working condition; A determination module, configured to determine a target state of charge corresponding to the current operating condition according to the vehicle data and the environmental data; The control module is used to control the discharge or charge of the power battery of the hybrid vehicle according to the target state of charge.

9. A hybrid electric vehicle, wherein: The hybrid vehicle comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the control method of the hybrid vehicle as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores a computer program, and when the computer program is executed, the control method of the hybrid vehicle according to any one of claims 1 to 7 is implemented.

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