Torque distribution method and apparatus, electronic device and storage medium

Abstract

Provided are a torque distribution method and apparatus, an electronic device and a storage medium. The method comprises: acquiring the current battery temperature of a high-voltage battery operating in a low-temperature environment and a driver demand torque (S101); determining target charging and discharging power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge capacity of the high-voltage battery (S102); determining, according to the target charging and discharging power and the actual power of a drive motor, generated power required by a range extender system (S103); and determining a target engine speed and a target engine torque of an engine and a target generator speed and a target generator torque of a generator according to the generated power and an optimal efficiency curve of the range extender system (S104). According to the method, the generated power can be adjusted along with the temperature, so that the battery does not need to work near the power limit for a long time, the safety of the high-voltage battery is improved, and the drivability can be improved. Moreover, the torque of the engine can be kept accurate in a low-temperature environment, thereby guaranteeing the accuracy of the charging power.

Description

Torque distribution method and device, electronic device and storage medium Technical Field

[0001] The present application relates to the field of hybrid power system control, and in particular to a torque distribution method and device, an electronic device, and a storage medium. Background Art

[0002] The series-parallel hybrid system consists of three power sources: an engine, a generator, and an electric motor. Its main hybrid driving modes include series and parallel modes. In order to ensure that the sum of the torque of the three power sources can meet the driver's needs and the system efficiency can be optimized.

[0003] To achieve optimal system efficiency and meet driving demands for wheel torque, the three power sources must be coordinated to deliver appropriate target torque or speed in different modes. However, in low-temperature scenarios, battery charge and discharge capacity is insufficient. When driver demands rapidly change, conventional energy management strategies for torque distribution calculations can easily lead to battery overcharge and overdischarge, poor drivability, and other issues. Therefore, in these scenarios, the torque and speed outputs of the engine, generator, and electric motor must be coordinated to ensure power balance within the powertrain, ultimately achieving the goals of ensuring component life, driver demands, and drivability.

[0004] Some related technologies fail to consider power generation tracking solutions at low temperatures, making it difficult to respond to the driver's needs in a timely manner during intense driving, which can lead to drivability issues. Others fail to consider charging power deviations caused by inaccurate engine torque at low temperatures, as well as safety issues caused by prolonged operation of the battery near its power limit.

[0005] Summary of the Invention

[0006] One of the purposes of this application is to provide a torque distribution method to solve at least one technical problem existing in the related art; the second purpose is to provide a torque distribution device; the third purpose is to provide an electronic device; and the fourth purpose is to provide a storage medium.

[0007] In order to achieve the above objectives, the technical solutions adopted in this application are as follows:

[0008] A torque distribution method, comprising:

[0009] Obtaining the current battery temperature of the high-voltage battery operating in a low-temperature environment and the driver's demand torque;

[0010] determining a target charge / discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery;

[0011] Determining the power generation required by the range extender system according to the target charge and discharge power and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the driver's required torque;

[0012] The target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator are determined according to the generated power and the efficiency optimal curve of the range extender system.

[0013] According to the above technical means, since the target charge and discharge power is obtained based on the battery charge of the high-voltage battery and the current battery temperature, the impact of the battery charge and discharge power in a low-temperature environment can be effectively considered, and the power generation power required by the range extender system is determined based on the target charge and discharge power and the actual power of the drive motor, so that the power generation power can be adjusted according to the temperature, so that the battery does not need to work near the power limit for a long time, thereby effectively improving the safety of the high-voltage battery; in addition, the actual power of the drive motor is obtained based on the driver's required torque, so that the power generation power is obtained in response to the driver's needs, thereby improving drivability; finally, the above technical means also determines the engine target speed and engine target torque of the engine, and the generator target speed and generator target torque of the generator based on the power generation power and the optimal efficiency curve of the range extender system, so that the engine torque can be kept accurate even in a low-temperature environment, thereby further ensuring the accuracy of the charging power.

[0014] Optionally, as in the aforementioned torque distribution method, determining the target charge and discharge power of the high-voltage battery according to the current battery temperature and the battery charge of the high-voltage battery includes:

[0015] Obtaining calibration information of the high-voltage battery, wherein the calibration information is used to indicate a battery temperature and a corresponding relationship between a battery charge and a battery charging and discharging power;

[0016] The target charge and discharge power is determined according to the calibration information, the current battery temperature, and the battery charge of the high-voltage battery.

[0017] According to the above technical means, by obtaining the calibration information of the high-voltage battery and then determining the target charge and discharge power, the efficiency of determining the target charge and discharge power can be effectively improved.

[0018] Optionally, as in the aforementioned torque distribution method, determining the target charge and discharge power according to the calibration information, the current battery temperature, and the battery charge of the high-voltage battery includes:

[0019] matching an original target charge and discharge power in the calibration information according to the current battery temperature and the battery charge of the high-voltage battery;

[0020] determining the actual power of the high-voltage battery according to the actual voltage and actual current of the high-voltage battery;

[0021] performing a first closed-loop control on the original target charge and discharge power according to a power deviation between the actual power and the original target charge and discharge power to obtain the target charge and discharge power, and determining a target voltage and a target current of the high-voltage battery;

[0022] The target voltage and target current are filtered.

[0023] According to the above technical means, the original target charge and discharge power is subjected to a first closed-loop control through the power deviation between the actual power and the original target charge and discharge power to obtain the target charge and discharge power, which can effectively ensure the stability and reliability of the charge and discharge of the high-voltage battery. In addition, the target voltage and target current are filtered to further ensure the stability of the power system powered by the high-voltage battery.

[0024] Optionally, as in the aforementioned torque distribution method, performing a first closed-loop control on the target charge and discharge power according to the power deviation between the actual power and the target charge and discharge power to obtain the target charge and discharge power includes:

[0025] When the power deviation indicates that the original target charge and discharge power is less than the actual power, increasing the original target charge and discharge power to obtain the target charge and discharge power;

[0026] When the power deviation indicates that the original target charge and discharge power is equal to the actual power, using the original target charge and discharge power as the target charge and discharge power;

[0027] When the power deviation indicates that the original target charge and discharge power is greater than the actual power, the original target charge and discharge power is reduced to obtain the target charge and discharge power.

[0028] According to the above technical means, the original target charge and discharge power can be adjusted in different situations to obtain a target charge and discharge power that is closest to the actual power.

[0029] Optionally, as in the aforementioned torque distribution method, determining the target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system includes:

[0030] determining an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and an optimal efficiency curve of the range extender system;

[0031] When the engine is running according to the generated power, performing a second closed-loop control on the original target engine torque according to a deviation between the actual engine speed and the original target engine speed to obtain the engine target torque;

[0032] The engine target speed, the generator target speed, and the generator target torque are obtained based on the engine target torque.

[0033] According to the above technical means, the influence of system fluctuation information, energy transfer efficiency and system error information on the power generation power can be taken into account, which can effectively improve the accuracy of the engine torque and thus avoid the charging power deviation caused by inaccurate engine torque.

[0034] Optionally, as in the aforementioned torque distribution method, when the engine is operating according to the generated power, performing a second closed-loop control on the original target engine torque according to a deviation between the actual engine speed of the engine and the original target engine speed to obtain the engine target torque includes:

[0035] When the original target engine speed is less than the actual engine speed, increasing the original target engine speed to obtain the target engine torque;

[0036] When the original target engine speed is equal to the actual engine speed, the original target engine speed is used as the target engine torque;

[0037] When the original target engine speed is greater than the actual engine speed, the original target engine speed is reduced to obtain the engine target torque.

[0038] According to the above technical means, the original target speed of the engine can be adjusted under different circumstances to obtain the target speed of the engine that best meets the target power generation.

[0039] Optionally, as in the aforementioned torque distribution method, determining the power generation power required by the range extender system according to the target charge and discharge power and the actual power of the drive motor includes:

[0040] determining the power consumption of high-voltage accessories of the vehicle in which the high-voltage battery is located;

[0041] determining an actual power of a drive motor in the vehicle;

[0042] The generated power is determined based on the sum of the target charge and discharge power, the power consumed by the high-voltage accessories, and the actual power.

[0043] According to the above technical means, by determining the generated power based on the sum of the target charge and discharge power, the power consumption of the high-voltage accessories and the actual power, the safety of the high-voltage battery and the stability of the system can be further ensured.

[0044] Optionally, as in the aforementioned torque distribution method, before obtaining the current battery temperature of the high-voltage battery operating in a low-temperature environment and the driver's required torque, the method further includes:

[0045] When the current ambient temperature is lower than or equal to the lower temperature limit indicated by the battery information of the high-voltage battery, it is determined that the high-voltage battery is operating in the low-temperature environment, and a jump operation is performed to obtain the current battery temperature of the high-voltage battery operating in the low-temperature environment and the driver's required torque.

[0046] According to the above technical means, it is possible to timely and accurately determine whether the high-voltage battery is operating in a low-temperature environment, and then enter the low-temperature operation mode in time, and ensure the continuous operation of the engine and high-voltage battery in this mode.

[0047] Optionally, as in the aforementioned torque distribution method, determining the actual power of the driving motor in the vehicle includes:

[0048] assigning the driver demand torque to the driving torque demand of the driving motor;

[0049] sending the drive torque demand to a dual-motor controller;

[0050] The driving motor is controlled by the dual-motor controller, and the actual power of the driving motor is determined.

[0051] According to the above technical means, the dual-motor controller can be controlled according to the torque required by the driver, so as to respond to the driver's needs in a timely manner.

[0052] According to another aspect of the present application, a torque distribution device is provided, comprising:

[0053] an acquisition module for acquiring a current battery temperature of a high-voltage battery operating in a low-temperature environment and a driver demand torque;

[0054] a first determining module, configured to determine a battery target charge and discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery;

[0055] a second determining module, configured to determine the generated power required by the range extender system according to the target charge and discharge power of the battery and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the driver's required torque;

[0056] The third determination module is configured to determine an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system.

[0057] According to another aspect of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus.

[0058] The memory is used to store computer programs;

[0059] The processor is configured to execute the method steps described in any one of the preceding items by running the computer program stored in the memory.

[0060] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, wherein the computer program is configured to execute the method steps as described in any of the preceding items when running.

[0061] Beneficial effects of this application:

[0062] (1) The target charge and discharge power in this application is obtained based on the battery charge of the high-voltage battery and the current battery temperature. Therefore, the impact of low-temperature conditions on the battery charge and discharge power can be effectively considered, and the power generation power required by the range extender system can be determined based on the target charge and discharge power and the actual power of the drive motor. The power generation power can also be adjusted according to the temperature, so that the battery does not need to work near the power limit for a long time, thereby effectively improving the safety of the high-voltage battery.

[0063] (2) The actual power of the driving motor in the present application is obtained based on the torque required by the driver, so that the generated power is obtained in response to the driver's demand, thereby improving drivability.

[0064] (3) The present application also determines the target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator based on the power generation power and the optimal efficiency curve of the range extender system, so that the torque of the engine can be kept accurate even in a low temperature environment, thereby further ensuring the accuracy of the charging power. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] FIG1 is a schematic flow chart of a torque distribution method in one embodiment of the present application;

[0066] FIG2 is a schematic diagram of a series-parallel hybrid power system according to one embodiment of the present application;

[0067] FIG3 is a schematic flow chart of a torque distribution method in another embodiment of the present application;

[0068] FIG4 is a schematic flow chart of a torque distribution method in another embodiment of the present application;

[0069] FIG5 is a schematic diagram of a closed-loop control of target charge and discharge power of a battery in one embodiment of the present application;

[0070] FIG6 is a schematic flow chart of a torque distribution method in another embodiment of the present application;

[0071] FIG7 is a schematic diagram of a closed-loop control of an engine target torque in one embodiment of the present application;

[0072] FIG8 is a schematic flow chart of a torque distribution method in one embodiment of the present application;

[0073] FIG9 is a flow chart of a closed-loop control method applied to a torque distribution method in an application example of the present application;

[0074] FIG10 is a flow chart of a torque distribution method in an application example of the present application;

[0075] FIG11 is a structural block diagram of an optional torque distribution device according to an embodiment of the present application;

[0076] FIG12 is a structural block diagram of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0077] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0078] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0079] According to one aspect of an embodiment of the present application, a torque distribution method is provided. Optionally, in this embodiment, the torque distribution method can be applied to a hardware environment consisting of a terminal and a server. The server is connected to the terminal via a network and can be used to provide services (such as data storage services, data analysis services, etc.) to the terminal or a client installed on the terminal. A database can be set up on the server or independently of the server to provide data storage services for the server.

[0080] The aforementioned network may include, but is not limited to, at least one of the following: a wired network and a wireless network. The aforementioned wired network may include, but is not limited to, at least one of the following: a wide area network, a metropolitan area network, or a local area network. The aforementioned wireless network may include, but is not limited to, at least one of the following: Wi-Fi (Wireless Fidelity) and Bluetooth. The terminal may be, but is not limited to, a PC, a mobile phone, a tablet computer, or the like.

[0081] The torque distribution method of the embodiment of the present application can be executed by a server, a terminal, or both. The torque distribution method of the embodiment of the present application can be executed by a terminal or a client installed thereon.

[0082] Taking the torque distribution method of this embodiment executed by a terminal as an example, FIG1 is a flow chart of a torque distribution method provided by an embodiment of the present application, which is applied to the series-parallel hybrid power system shown in FIG2 , and includes the following steps:

[0083] Step S101 , obtaining the current battery temperature of a high-voltage battery operating in a low-temperature environment and the driver's required torque.

[0084] As an optional embodiment, as in the aforementioned torque distribution method, before obtaining the current battery temperature of the high-voltage battery operating in a low-temperature environment and the driver's required torque in step S101, the method further includes:

[0085] When the current ambient temperature is lower than or equal to the lower temperature limit indicated by the battery information of the high-voltage battery, it is determined that the high-voltage battery is operating in a low-temperature environment, and a jump operation is performed to obtain the current battery temperature of the high-voltage battery operating in a low-temperature environment and the driver's required torque.

[0086] For example, the battery type and / or battery brand of the high-voltage battery can be determined, and the battery information corresponding to the high-voltage battery can be determined (i.e., the battery information may include but is not limited to: battery type, battery brand, temperature range (i.e., optimal operating temperature range, for example: -25°C to

[0087] 40℃, -20℃ to 45℃, etc.)).

[0088] Then, after determining that the vehicle is operating in a low-temperature environment, the current battery temperature of the high-voltage battery and the driver's required torque can be determined; the current battery temperature can be detected by a temperature sensor that detects the temperature of the high-voltage battery, and the driver's required torque can be obtained by obtaining relevant data on the driver's accelerator pedal.

[0089] According to the above technical means, it is possible to timely and accurately determine whether the high-voltage battery is operating in a low-temperature environment, and then enter the low-temperature operation mode in time, and ensure the continuous operation of the engine and high-voltage battery in this mode.

[0090] Step S102 : determining a target charge / discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery.

[0091] Generally, each battery has a corresponding battery charge, so the battery charge of the high-voltage battery can be determined in real time or in advance.

[0092] After determining the current battery temperature and the battery charge of the high-voltage battery, a target charge and discharge power for the high-voltage battery at the current battery temperature can be determined based on a first relationship between the battery temperature and the battery charge and discharge power, and a second relationship between the battery charge and the battery charge and discharge power. For example, the first relationship is a proportional relationship, and the second relationship is also a proportional relationship.

[0093] The target charge and discharge power may be the charge and discharge power that the high-voltage battery is expected to achieve.

[0094] Step S103 : determining the power generation required by the range extender system according to the target charge and discharge power and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the torque required by the driver.

[0095] After the driver's demand torque is determined, the actual required power for driving the vehicle can be determined based on the driver's demand torque.

[0096] Therefore, the power generation required by the range extender system can be determined based on the target charging and discharging power and the actual power of the drive motor.

[0097] The range-extended system uses an internal combustion engine (ICE) range extender installed on the vehicle. However, this ICE does not directly drive the vehicle; it only generates electricity. This electricity not only directly powers the drive motor but also charges the battery. When the battery is fully charged, the ICE stops, allowing the battery to directly propel the motor forward.

[0098] Step S104 : determining the target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system.

[0099] Different vehicle range extenders have corresponding optimal efficiency curves. This curve is calculated by taking the lowest fuel consumption points on the range extender's constant power curve, connecting these points, and analyzing the final results to determine the optimal operating route.

[0100] After determining the optimal curve of the generated power and the efficiency of the range extender system of the vehicle, analysis can be performed based on the generated power and the optimal efficiency curve to determine the target engine speed and target engine torque of the engine and the target generator speed and target generator torque of the generator.

[0101] According to the above technical means, since the target charge and discharge power is obtained based on the battery charge of the high-voltage battery and the current battery temperature, the impact of the battery charge and discharge power in a low-temperature environment can be effectively considered, and the power generation power required by the range extender system is determined based on the target charge and discharge power and the actual power of the drive motor, so that the power generation power can be adjusted according to the temperature, so that the battery does not need to work near the power limit for a long time, which can effectively improve the safety of the high-voltage battery; in addition, the actual power of the drive motor is obtained based on the driver's required torque, so that the power generation power can be obtained in response to the driver's needs, thereby improving drivability; finally, the above technical means also determines the engine target speed and engine target torque of the engine, and the generator target speed and generator target torque of the generator based on the power generation power and the optimal efficiency curve of the range extender system, so that the engine torque can be kept accurate even in a low-temperature environment, which can be used as an optional embodiment to ensure the accuracy of the charging power.

[0102] As shown in FIG3 , as an optional embodiment, as in the aforementioned torque distribution method, step S102 determines the target charge and discharge power of the high-voltage battery based on the current battery temperature and the battery charge of the high-voltage battery, including the following steps:

[0103] Step S201, obtaining calibration information of the high-voltage battery, wherein the calibration information is used to indicate the battery temperature and the corresponding relationship between the battery charge and the battery charging and discharging power;

[0104] Step S202 : determining the target charge and discharge power according to the calibration information, the current battery temperature, and the battery charge of the high-voltage battery.

[0105] Optionally, the calibration information of the high-voltage battery can be obtained by analyzing other batteries of the same type as the high-voltage battery; to determine the correspondence between the battery temperature of the high-voltage battery and the battery charge and discharge power, and the correspondence can be represented by graphs, tables, functions, etc.

[0106] After the calibration information is determined, the calibration information can be matched according to the current battery temperature and the battery and power of the high-voltage battery, and the target charge and discharge power can be finally obtained.

[0107] According to the above technical means, by obtaining the calibration information of the high-voltage battery and then determining the target charge and discharge power, the efficiency of determining the target charge and discharge power can be effectively improved.

[0108] As shown in FIG4 , as an optional embodiment, as in the aforementioned torque distribution method, step S202 determines the target charge and discharge power according to the calibration information, the current battery temperature, and the battery charge of the high-voltage battery, including the following steps:

[0109] Step S301, matching the original target charge and discharge power in the calibration information according to the current battery temperature and the battery charge of the high-voltage battery;

[0110] Step S302, determining the actual power of the high-voltage battery according to the actual voltage and actual current of the high-voltage battery;

[0111] Step S303, performing a first closed-loop control on the original target charge and discharge power based on the power deviation between the actual power and the original target charge and discharge power, obtaining the target charge and discharge power, and determining the target voltage and target current of the high-voltage battery;

[0112] Step S304: filtering the target voltage and target current.

[0113] Optionally, the battery can be charged according to the SOC HV and the current battery temperature T BattDetermine the original target charge and discharge power P of the battery Tar ; According to the actual voltage U of the high voltage battery HV and the actual current I HV Calculate the actual power of the high-voltage battery; P HV =U HV ×I HV , and perform closed-loop control on the target charge and discharge power of the battery based on this power; filter the battery target charge and discharge power calculated by the above method (i.e., filter the target voltage and target current) to ensure the stability of the power system.

[0114] As shown in FIG5 , as an optional embodiment, as in the aforementioned torque distribution method, step S303 performs a first closed-loop control on the target charge and discharge power based on the power deviation between the actual power and the target charge and discharge power to obtain the target charge and discharge power, including the following steps:

[0115] Step S401: when the power deviation indicates that the original target charge and discharge power is less than the actual power, the original target charge and discharge power is increased to obtain the target charge and discharge power;

[0116] Step S402: When the power deviation indicates that the original target charge and discharge power is equal to the actual power, the original target charge and discharge power is used as the target charge and discharge power;

[0117] Step S403 : When the power deviation indicates that the original target charge and discharge power is greater than the actual power, the original target charge and discharge power is reduced to obtain the target charge and discharge power.

[0118] According to the technical means described in steps S401 to S403, the original target charge and discharge power can be adjusted in different situations to obtain a target charge and discharge power that is closest to the actual power.

[0119] According to the above technical means, the original target charge and discharge power is subjected to a first closed-loop control through the power deviation between the actual power and the original target charge and discharge power to obtain the target charge and discharge power, which can effectively ensure the stability and reliability of the charge and discharge of the high-voltage battery. In addition, filtering the target voltage and target current can be used as an optional embodiment to ensure the stability of the power system powered by the high-voltage battery.

[0120] As shown in FIG6 , as an optional embodiment, as in the aforementioned torque distribution method, step S104 determines the target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator based on the generated power and the optimal efficiency curve of the range extender system, including the following steps:

[0121] Step S501 : determining an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system.

[0122] That is to say, based on the power generation power and the optimal efficiency curve of the range extender system, the following may need to be further adjusted: the original target speed and original target torque of the engine, and the original target speed and original target torque of the generator.

[0123] Step S502 , when the engine is running according to the generated power, the original target torque of the engine is subjected to a second closed-loop control based on the deviation between the actual engine speed and the original target engine speed to obtain the target engine torque.

[0124] This method can solve the problem of obtaining system fluctuation information, energy transfer efficiency and system error information affecting power generation; system fluctuation information can be, for example, fluctuation information caused by external vibrations and switching air conditioners.

[0125] Energy transfer efficiency can be used to indicate the proportion of losses that occur during energy transfer.

[0126] System error information may include, but is not limited to, errors in the energy transfer process or the power monitoring process.

[0127] That is to say, through the deviation between the actual engine speed and the original target engine speed, the engine original target torque is subjected to a second closed-loop control to obtain the engine target torque. This can meet the requirements of the engine operating according to the power generation power in the presence of system fluctuation information, energy transfer efficiency and system error information.

[0128] Step S503 : Based on the engine target torque, the engine target speed, the generator target speed, and the generator target torque are obtained.

[0129] After obtaining system fluctuation information, energy transfer efficiency and system error information, the target torque of the engine can be closed-loop controlled according to the actual engine speed, further ensuring the safety of the high-voltage battery and the stability of the system.

[0130] The original target engine speed may be the target torque of the engine determined before the second closed-loop control is performed on the original target engine torque.

[0131] After the engine target torque is determined, since the engine torque is respectively related to the engine speed, the generator speed and the generator torque, the engine target speed, the generator target speed and the generator target torque can be determined based on the engine target torque.

[0132] According to the above technical means, combined with system fluctuation information, energy transfer efficiency and system error information, the accuracy of engine torque can be effectively improved, thereby avoiding charging power deviation caused by inaccurate engine torque.

[0133] As shown in FIG7 , as an optional embodiment, as in the aforementioned torque distribution method, step S502, when the engine is operating according to the generated power, performs a second closed-loop control on the original target engine torque based on the deviation between the actual engine speed and the original target engine speed to obtain the engine target torque, including the following steps:

[0134] Step S601: when the original target engine speed is less than the actual engine speed, the original target engine torque is increased to obtain the target engine torque;

[0135] Step S602: When the original target engine speed is equal to the actual engine speed, the original target engine torque is used as the target engine torque;

[0136] Step S603: When the original target engine speed is greater than the actual engine speed, the original target engine torque is reduced to obtain the engine target torque.

[0137] Optionally, the target engine speed may be determined according to the above method, that is, the actual engine speed is adjusted according to the original target engine speed.

[0138] When the latest engine target speed is the same as the actual engine speed or is within the preset error, the engine target speed will no longer be adjusted. Instead, the engine target torque will be used as the original engine target torque, and the engine target speed will be used as the original engine target speed, and will be adjusted again according to the method described in the above steps S601 to S603.

[0139] In this embodiment, the actual speed of the engine is directly proportional to the actual speed of the generator.

[0140] According to the above technical means, the original target torque of the engine can be adjusted in different situations to obtain the target torque of the engine that can meet the target speed of the generator when the generator operates according to the target power generation.

[0141] As shown in FIG8 , as an optional embodiment, as in the aforementioned torque distribution method, step S103 of determining the power generation required by the range extender system based on the target charge and discharge power and the actual power of the drive motor includes the following steps:

[0142] Step S701, determining the power consumption of the high-voltage accessories of the vehicle where the high-voltage battery is located;

[0143] The power consumption of high-voltage accessories may include, but is not limited to, the power consumption of an air conditioner, the power consumption of audio-visual equipment, etc. Optionally, it may be determined in real time based on the operating status of the high-voltage accessories.

[0144] Step S702: determining the actual power of the driving motor in the vehicle.

[0145] As an optional embodiment, the aforementioned torque distribution method for determining the actual power of the vehicle's drive motors includes: assigning the driver's requested torque to the drive torque demand of the drive motors; transmitting the drive torque demand to a dual-motor controller; and controlling the drive motors via the dual-motor controller to determine the actual power of the drive motors. This technical approach allows the dual-motor controller to be controlled according to the driver's requested torque, thereby enabling timely response to the driver's demands.

[0146] Step S703: Determine the generated power based on the sum of the target charge and discharge power, the power consumed by the high-voltage accessories, and the actual power.

[0147] After determining the target charge and discharge power, high-voltage accessory power consumption and actual power of the drive motor, the required power generation power can be determined by adding the target charge and discharge power, high-voltage accessory power consumption and actual power.

[0148] According to the above technical means, by determining the generated power based on the sum of the target charging and discharging power, the high-voltage accessory power consumption and the actual power, it can be used as an optional embodiment to ensure the safety of the high-voltage battery and the stability of the system.

[0149] As shown in FIG9 and FIG10 , an application example of applying any of the above embodiments is provided:

[0150] S1, determining whether to enter a low-temperature battery protection mode based on conditions such as temperature and battery capacity (i.e., determining that the current ambient temperature is lower than or equal to the lower temperature limit indicated by the battery information of the high-voltage battery), and ensuring continuous operation of the engine in this mode;

[0151] S2, according to the driver's demand torque Tq Drv Determine the drive torque requirement Tq of the drive motor Mot and the driving torque demand Tq MotSent to the dual-motor controller as target torque;

[0152] S3, according to the battery charge SOC HV and battery temperature T Batt Determine the target charge and discharge power P of the battery Tar ;

[0153] S4, according to the actual voltage U of the high-voltage battery HV and the actual current I HV Calculate the actual power P of the high-voltage battery HV =U HV ×I HV , and perform a first closed-loop control on the target charge and discharge power of the battery according to this power;

[0154] S5, filtering the target charge and discharge power of the battery calculated by the above method to ensure the stability of the power system;

[0155] S6, according to the target charge and discharge power P of the battery Tar , high-voltage accessories consumption P NonTrac And the actual power P of the driving motor Mot Calculate the power generation power P required by the range extension system Eng =P Tar +P NonTrac +P Mot ;

[0156] S7, according to the power generation power P of the range extension system Eng , determine the target speed n of the engine and generator according to the optimal efficiency curve of the range extender system Eng 、n Ger and target torque Tq Eng 、Tq Ger ;

[0157] S8, taking into account various factors such as system fluctuations, energy transfer efficiency and system errors, performs closed-loop control of the engine's target torque according to the actual engine speed, further ensuring the safety of the high-voltage battery and the stability of the system.

[0158] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0159] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM (Read-Only Memory, Read-Only Memory) / RAM (Random Access Memory, Random Access Memory), a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0160] According to another aspect of the embodiment of the present application, a torque distribution device for implementing the above torque distribution method is also provided. FIG11 is a structural block diagram of an optional torque distribution device according to an embodiment of the present application. As shown in FIG11 , the device may include:

[0161] an acquisition module 1 for acquiring a current battery temperature of a high-voltage battery operating in a low-temperature environment and a driver demand torque;

[0162] A first determination module 2 is configured to determine a target charge and discharge power of the high-voltage battery at the current battery temperature based on the current battery temperature and the battery charge of the high-voltage battery;

[0163] A second determination module 3 is configured to determine the power generation required by the range extender system based on the target charge and discharge power of the battery and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the torque required by the driver;

[0164] The third determination module 4 is configured to determine an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and the efficiency optimal curve of the range extender system.

[0165] It should be noted that the acquisition module 1 in this embodiment can be used to execute the above step S101, the first determination module 2 in this embodiment can be used to execute the above step S102, the second determination module 3 in this embodiment can be used to execute the above step S103, and the third determination module 4 in this embodiment can be used to execute the above step S104.

[0166] In addition to the above modules, the device in this embodiment may also include a module for executing any method in any of the above torque distribution method embodiments.

[0167] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the above modules, as part of the device, can be run in a hardware environment that implements the method shown in Figure 1, and can be implemented by software or hardware, wherein the hardware environment includes a network environment.

[0168] According to another aspect of the embodiment of the present application, an electronic device for implementing the above-mentioned torque distribution method is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0169] According to another embodiment of the present application, an electronic device is also provided, including: as shown in Figure 12, the electronic device may include: a processor 1501, a communication interface 1502, a memory 1503 and a communication bus 1504, wherein the processor 1501, the communication interface 1502, and the memory 1503 communicate with each other through the communication bus 1504.

[0170] Memory 1503, used for storing computer programs;

[0171] The processor 1501 is configured to execute the program stored in the memory 1503 to implement the following steps:

[0172] Step S101 , obtaining the current battery temperature of a high-voltage battery operating in a low-temperature environment and the driver's required torque.

[0173] Step S102 : determining a target charge / discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery.

[0174] Step S103 : determining the power generation required by the range extender system according to the target charge and discharge power and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the torque required by the driver.

[0175] Step S104 : determining an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and the efficiency optimal curve of the range extender system.

[0176] Optionally, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. This communication bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, the figure shows only one thick line, but this does not imply that there is only one bus or only one type of bus. The communication interface is used for communication between the electronic device and other devices.

[0177] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage. Alternatively, the memory may be at least one storage device located away from the processor.

[0178] The above-mentioned processor can be a general-purpose processor, which can include but is not limited to: CPU (Central Processing Unit), NP (Network Processor), etc.; it can also be DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0179] An embodiment of the present application further provides a computer-readable storage medium, the storage medium including a stored program, wherein the method steps of the above method embodiment are executed when the program is run.

[0180] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a ROM, a RAM, a mobile hard disk, a magnetic disk, or an optical disk.

[0181] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0182] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more computer devices (which can be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0183] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0184] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units is merely 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 system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0185] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution provided in this embodiment.

[0186] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0187] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A torque distribution method, It is characterized in that include: Obtaining current battery temperature of a high voltage battery operating in a low temperature environment and driver demand torque; determining a target charge and discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery; Determining the power generation power required by the range-extending system according to the target charging and discharging power and the actual power of the driving motor, wherein the actual power of the driving motor is obtained based on the torque required by the driver; The target engine speed and target engine torque of the engine, and the target generator speed and target generator torque of the generator are determined according to the generated power and the optimal efficiency curve of the range extender system.

2. The torque distribution method according to claim 1, It is characterized in that The determining the target charge and discharge power of the high-voltage battery according to the current battery temperature and the battery charge of the high-voltage battery includes: Acquiring calibration information of the high-voltage battery, wherein the calibration information is used to indicate the battery temperature and the corresponding relationship between the battery charge and the battery charging and discharging power; The target charging and discharging power is determined according to the calibration information, the current battery temperature and the battery charge of the high-voltage battery.

3. The torque distribution method according to claim 2, It is characterized in that The determining the target charge and discharge power according to the calibration information, the current battery temperature and the battery charge of the high-voltage battery includes: According to the current battery temperature and the battery charge of the high-voltage battery, matching the original target charge and discharge power in the calibration information; Determining the actual power of the high-voltage battery according to the actual voltage and actual current of the high-voltage battery; According to the power deviation between the actual power and the original target charge and discharge power, the original target charge and discharge power is controlled in a first closed loop to obtain the target charge and discharge power, and the target voltage and target current of the high-voltage battery are determined; The target voltage and the target current are filtered.

4. The torque distribution method according to claim 3, It is characterized in that The step of performing a first closed-loop control on the target charge and discharge power by using a power deviation between the actual power and the target charge and discharge power to obtain the target charge and discharge power includes: When the power deviation indicates that the original target charge and discharge power is less than the actual power, increasing the original target charge and discharge power to obtain the target charge and discharge power; When the power deviation indicates that the original target charge and discharge power is equal to the actual power, using the original target charge and discharge power as the target charge and discharge power; When the power deviation indicates that the original target charge and discharge power is greater than the actual power, the original target charge and discharge power is reduced to obtain the target charge and discharge power.

5. The torque distribution method according to claim 1, It is characterized in that Determining the target engine speed and target engine torque of the engine, the target generator speed and target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system includes: Determine an original target engine speed and an original target engine torque of the engine, and an original target generator speed and an original target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system; When the engine is running according to the generated power, the original target torque of the engine is subjected to a second closed-loop control according to a deviation between the actual engine speed of the engine and the original target engine speed, so as to obtain the target torque of the engine; Based on the engine target torque, the engine target speed, the generator target speed, and the generator target torque are obtained.

6. The torque distribution method according to claim 5, It is characterized in that When the engine is running according to the generated power, the original target torque of the engine is subjected to a second closed-loop control through a deviation between the actual engine speed of the engine and the original target engine speed to obtain the target engine torque, including: When the original target speed of the engine is less than the actual speed of the engine, increasing the original target speed of the engine to obtain the target torque of the engine; When the original target speed of the engine is equal to the actual speed of the engine, the original target speed of the engine is used as the target torque of the engine; When the original target engine speed is greater than the actual engine speed, the original target engine speed is reduced to obtain the engine target torque.

7. The torque distribution method according to claim 1, It is characterized in that Determining the power generation required by the range extender system according to the target charge and discharge power and the actual power of the drive motor includes: Determining the power consumption of high-voltage accessories of the vehicle in which the high-voltage battery is located; determining an actual power of a drive motor in the vehicle; The generated power is determined based on the sum of the target charging and discharging power, the power consumed by the high-voltage accessories, and the actual power.

8. The torque distribution method according to claim 1, It is characterized in that Before acquiring the current battery temperature of the high-voltage battery operating in a low-temperature environment and the driver's required torque, the method further includes: When the current ambient temperature is lower than or equal to the lower temperature limit indicated by the battery information of the high-voltage battery, it is determined that the high-voltage battery is operating in the low-temperature environment, and a jump operation is performed to obtain the current battery temperature of the high-voltage battery operating in the low-temperature environment and the driver's required torque.

9. The torque distribution method according to claim 7, It is characterized in that The determining the actual power of the driving motor in the vehicle comprises: assigning the driver demand torque to the driving torque demand of the driving motor; sending the drive torque demand to a dual motor controller; The driving motor is controlled by the dual-motor controller, and the actual power of the driving motor is determined.

10. A torque distribution device, It is characterized in that include: an acquisition module for acquiring a current battery temperature of a high-voltage battery operating in a low-temperature environment and a driver demand torque; A first determination module, configured to determine a battery target charge and discharge power of the high-voltage battery at the current battery temperature according to the current battery temperature and the battery charge of the high-voltage battery; a second determination module, configured to determine the power generation power required by the range-extending system according to the target charge and discharge power of the battery and the actual power of the drive motor, wherein the actual power of the drive motor is obtained based on the torque required by the driver; The third determination module is used to determine the original target engine speed and original target engine torque of the engine, and the original target generator speed and original target generator torque of the generator according to the generated power and the optimal efficiency curve of the range extender system.

11. An electronic device comprising a processor, a communication interface, a memory and a communication bus, in, The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is configured to execute the method steps of any one of claims 1 to 9 by running the computer program stored in the memory.

12. A computer-readable storage medium, It is characterized in that The storage medium stores a computer program, wherein the computer program is configured to execute the method steps described in any one of claims 1 to 9 when executed.

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