Vehicle charging control method and device and computer equipment

Abstract

The invention relates to a vehicle charging control method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a nominal charging current limiting value of a power battery at a current temperature; and determining a charging limit index of the power battery according to the nominal charging current-limiting value and the charging limit coefficient. And performing charging control on the power battery of the target vehicle according to the charging limit index and the vehicle working condition of the target vehicle. When the charging control is carried out on the power battery of the target vehicle, the nominal charging current limiting value of the power battery of the target vehicle at the current temperature is considered, and the charging limiting index of the power battery is determined based on the nominal charging current limiting value and the charging limiting coefficient; and finally, based on the charging limit index and the vehicle working condition of the target vehicle, charging control is performed on the power battery of the target vehicle, consideration factors are more comprehensive, the influence of adverse factors on the power battery is avoided, and the service life of the power battery can be effectively prolonged.

Description

Technical Field

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

[0002] A hybrid electric vehicle (i.e., a hybrid car) refers to a vehicle whose driving system is composed of two or more single driving systems that can operate simultaneously. The power of the vehicle is provided by the single driving system alone or together according to the actual vehicle operating state. The so-called hybrid electric vehicle generally refers to a gasoline-electric hybrid electric vehicle, which is powered by a traditional internal combustion engine and an electric motor.

[0003] When the temperature of the power battery of a hybrid vehicle is low, the activity of the chemical substances in the power battery is greatly reduced. In this case, in order to improve the efficiency of power conversion, the power battery is generally heated, which can improve the charging efficiency of the power battery. However, the existing method does not consider the impact of other factors on the charging of the power battery, but only considers heating, resulting in incomplete consideration of factors when charging the power battery, which will seriously affect the service life of the power battery. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle charging control method, device and computer equipment to improve the service life of the power battery in response to the above technical problems.

[0005] In a first aspect, the present application provides a vehicle charging control method. The method comprises:

[0006] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0007] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0008] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0009] In one embodiment, obtaining a nominal charging current limit value of a power battery of a target vehicle at a current temperature includes:

[0010] According to the current temperature and the current state of charge of the power battery, a nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined.

[0011] In one embodiment, the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient, and a power battery voltage limit coefficient;

[0012] Accordingly, the charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient, including:

[0013] The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight;

[0014] The product of the nominal charging current limit value and the limit weight value is used as the actual charging current limit value in the charging limit index of the power battery;

[0015] The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery.

[0016] In one embodiment, charging control of a power battery of a target vehicle is performed according to a charging restriction index and a vehicle operating condition of the target vehicle, including:

[0017] Obtaining a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery;

[0018] The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery;

[0019] The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0020] In one embodiment, charging control of a power battery of a target vehicle is performed according to an actual electric power limit, a charging limit index, and a vehicle operating condition of the target vehicle, including:

[0021] The actual electric power limit and the actual charging power limit are summed to obtain the actual allowable electric power of the target motor of the target vehicle;

[0022] Get the current speed and power generation efficiency value of the target motor;

[0023] Determine the actual allowable power generation torque value of the target motor according to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor;

[0024] The charging of the power battery of the target vehicle is controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0025] In one embodiment, determining the actual allowable power generation torque value of the target motor according to the actual allowable electric power, and the current speed and power generation efficiency value of the target motor includes:

[0026] The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor;

[0027] According to the actual allowable mechanical power and the current rotation speed of the target motor, the actual allowable power generation torque value of the target motor is determined.

[0028] In a second aspect, the present application also provides a vehicle charging control device. The device includes:

[0029] An acquisition module, used to acquire a nominal charging current limit value of a power battery of a target vehicle at a current temperature;

[0030] A determination module, used to determine a charging limit index of a power battery according to a nominal charging current limit value and a charging limit coefficient;

[0031] The control module is used to control the charging of the power battery of the target vehicle according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0032] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0033] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0034] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0035] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0037] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0038] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0039] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0040] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0041] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0042] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0043] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0044] The above-mentioned vehicle charging control method, device and computer equipment obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature. According to the nominal charging current limit value and the charging limit coefficient, the charging limit index of the power battery is determined. According to the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging. When the power battery of the target vehicle is controlled for charging, the present application not only considers obtaining the nominal charging current limit value of the power battery of the target vehicle at the current temperature, but also determines the charging limit index of the power battery based on the nominal charging current limit value and the charging limit coefficient. Finally, based on the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging, which not only realizes flexible control of the power battery during charging, but also considers more comprehensive factors, avoids the influence of adverse factors on the power battery, and can effectively improve the service life of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 An application environment diagram of the vehicle charging control method provided in this embodiment;

[0046] Figure 2 A schematic flow chart of a first vehicle charging control method provided in this embodiment;

[0047] Figure 3 A schematic diagram of a flow chart for determining an actual charging power limit value in a charging limit index of a power battery provided in this embodiment;

[0048] Figure 4 A schematic diagram of a flow chart for controlling charging of a power battery of a target vehicle provided in this embodiment;

[0049] Figure 5 A schematic flow chart of a second vehicle charging control method provided in this embodiment;

[0050] Figure 6 A structural block diagram of a vehicle charging control device provided in this embodiment;

[0051] Figure 7 This is a diagram of the internal structure of the computer device provided in this embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] The vehicle charging control method provided in the embodiment of the present application can be executed by the target vehicle 102, or can be executed by the server 104. That is, the method can be applied to Figure 1 In the application environment shown. Taking the application to server 104 as an example, server 104 obtains the nominal charging current limit value of the power battery of target vehicle 102 at the current temperature. Server 104 determines the charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient. Server 104 controls the charging of the power battery of target vehicle 102 according to the charging limit index and the vehicle operating condition of the target vehicle.

[0054] The server 104 may be implemented as an independent server or a server cluster consisting of multiple servers.

[0055] The target vehicle 102 mainly refers to a hybrid vehicle. A hybrid vehicle refers to a vehicle whose vehicle drive system is composed of two or more single drive systems that can operate simultaneously, and the power of the vehicle is provided by the single drive systems alone or together according to the actual vehicle operating state. The so-called hybrid vehicle generally refers to a gasoline-electric hybrid vehicle, which uses a traditional internal combustion engine and an electric motor as a power source.

[0056] In one embodiment, if Figure 2 As shown, a vehicle charging control method is provided, which is applied to Figure 1 The server in the example is used as an example. Figure 2 As shown, the following steps are included:

[0057] S201, obtaining a nominal charging current limit value of a power battery of a target vehicle at a current temperature.

[0058] The target vehicle refers to the hybrid electric vehicles (HEVs) that require charging control. The power battery refers to the power battery of the target vehicle. The power battery refers to the device used to store electrical energy in a hybrid vehicle; these batteries are an important part of the hybrid system and provide power to the vehicle together with the traditional internal combustion engine. The current temperature refers to the ambient temperature of the target vehicle at the current moment. The nominal charging current limit value refers to the maximum value of the designed or recommended charging current of the power battery under normal working conditions, which is generally given in the factory documents.

[0059] As an optional implementation of the embodiment of the present application, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is obtained by querying the query device.

[0060] As another optional implementation of the embodiment of the present application, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined according to the current temperature and the current state of charge of the power battery. Specifically, according to the current temperature and the current state of charge of the power battery, by looking up the three-dimensional table, according to the three-dimensional table recorded Content, the nominal charging current limit value of the target vehicle's power battery at the current temperature . Among them, SOC represents the current state of charge; Indicates the current temperature, which also refers to the current temperature of the power battery.

[0061] S202: Determine a charging limit index of the power battery according to a nominal charging current limit value and a charging limit coefficient.

[0062] The charging restriction coefficient indicates the restriction coefficient of the power battery when it is being charged. The charging restriction index refers to the relevant index as a charging constraint condition when the power battery is being charged.

[0063] As an optional implementation of the embodiment of the present application, the nominal charging current limit value and the charging limit coefficient are input into the neural network model, and the neural network model outputs the charging limit index of the power battery.

[0064] As another optional implementation of the embodiment of the present application, the nominal charging current limit value is adjusted according to the charging limit coefficient, and the adjusted nominal charging current limit value is used as the charging limit indicator of the power battery.

[0065] S203, controlling the charging of the power battery of the target vehicle according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0066] Among them, the operating conditions of the target vehicle are divided into parking conditions and driving conditions in this application. Parking conditions refer to the conditions corresponding to the target vehicle in the parking state. Driving conditions refer to the conditions corresponding to the target vehicle in the driving state.

[0067] Optionally, in this embodiment, the vehicle operating condition of the target vehicle is first determined, and a corresponding control strategy is determined based on the charging restriction index according to the vehicle operating condition of the target vehicle. Based on the control strategy, the power battery of the target vehicle is charged and controlled.

[0068] The above-mentioned vehicle charging control method obtains the nominal charging current limit value of the power battery of the target vehicle at the current temperature. According to the nominal charging current limit value and the charging limit coefficient, the charging limit index of the power battery is determined. According to the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging. When the power battery of the target vehicle is controlled for charging, the present application not only considers obtaining the nominal charging current limit value of the power battery of the target vehicle at the current temperature, but also determines the charging limit index of the power battery based on the nominal charging current limit value and the charging limit coefficient. Finally, based on the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging, which not only realizes flexible control of the power battery during charging, but also considers more comprehensive factors, avoids the influence of adverse factors on the power battery, and can effectively improve the service life of the power battery.

[0069] In one embodiment, the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient and a power battery voltage limit coefficient. On this basis, in order to more accurately determine the charging limit index, such as Figure 3 As shown, an optional implementation of S202 includes:

[0070] S301 , taking the product of the power battery cell pressure difference limiting coefficient, the power battery temperature difference limiting coefficient and the power battery voltage limiting coefficient as a limiting weight.

[0071] The limiting weight refers to the weight value used to balance and optimize the nominal charging current limit value.

[0072] Optionally, in this embodiment, a table lookup method is used Obtain the power battery cell voltage difference limit coefficient ; By table lookup Get the power battery temperature difference limit coefficient ; By looking up the table Get the power battery voltage limit coefficient .in, The maximum voltage of the power battery cell; It is the minimum voltage of the power battery cell; is the maximum temperature of the power battery cell; is the minimum temperature of the power battery cell; is the terminal voltage of the power battery; , , The data in the table are provided by the power battery manufacturer or calibrated according to the power battery characteristics.

[0073] Optionally, in this embodiment, the power battery cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient are sequentially multiplied, and the product result obtained after the product operation is used as the limit weight.

[0074] S302: taking the product of the nominal charging current limit value and the limit weight value as the actual charging current limit value in the charging limit index of the power battery.

[0075] Among them, the actual charging current limit value refers to the maximum charging current of the power battery during the actual charging process.

[0076] Optionally, in this embodiment, the actual charging current limit value in the charging limit index of the power battery can be determined by the following formula (1):

[0077] (1)

[0078] In formula (1), Indicates the actual charging current limit value. The meanings of other characters are described in detail in the above embodiments and will not be repeated here.

[0079] S303: taking the product of the actual charging current limit value and the battery voltage of the power battery as the actual charging power limit value in the charging restriction index of the power battery.

[0080] Among them, the actual charging power limit refers to the maximum charging power of the power battery during the actual charging process.

[0081] Optionally, in this embodiment, the actual charging power limit value in the charging limit index of the power battery can be determined by the following formula (2):

[0082] (2)

[0083] Among them, in formula (2) Indicates the actual charging power limit; Indicates the battery voltage of the power battery.

[0084] In this embodiment, the charging limit coefficient includes the power battery cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient. On this basis, the product of the power battery cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight. The product of the nominal charging current limit value and the limit weight is used as the actual charging current limit value in the charging limit index of the power battery. The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery. The obtained charging limit index is made more accurate, and the charging control of the power battery based on the charging limit index can effectively improve the service life of the power battery.

[0085] In one embodiment, in order to more effectively control the charging of the power battery and increase the service life of the power battery, Figure 4 As shown, an optional implementation of S203 includes:

[0086] S401 : Obtain a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery.

[0087] The battery heating device refers to a device installed in the target vehicle for heating the power battery. It should be noted that the battery heating device is an existing device, and its specific structure and function will not be described in detail here.

[0088] Optionally, in this embodiment, the nominal electric power limit of the battery heating device is obtained by calibration ; By looking up the table Obtain the battery heating power limit coefficient. Among them, the nominal electric power limit Obtained by calibration of the nominal power value or test power value of the battery heating device; The data in the table are provided by the power battery manufacturer or calibrated according to the power battery characteristics.

[0089] S402: taking the product of the battery heating power limit coefficient and the nominal electric power limit as the actual electric power limit of the power battery.

[0090] The actual power limit refers to the maximum charging power of the power battery during actual charging. The nominal power limit refers to the charging power limit calibrated by the factory.

[0091] Optionally, in this embodiment, the actual electric power limit of the power battery can be determined according to the following formula (3):

[0092] (3)

[0093] Among them, in formula (3) Indicates the actual electrical power limit.

[0094] S403, controlling the charging of the power battery of the target vehicle according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0095] Optionally, in this embodiment, the actual electric power limit and the actual charging power limit are summed as the actual allowable electric power of the target motor of the target vehicle. The current speed and power generation efficiency value of the target motor are obtained. According to the actual allowable electric power, the current speed and power generation efficiency value of the target motor, the actual allowable power generation torque value of the target motor is determined. According to the actual allowable power generation torque value, the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is charged and controlled.

[0096] Optionally, in this embodiment, the current speed and power generation efficiency value of the target motor can be obtained by a table lookup method.

[0097] Optionally, in this embodiment, the actual allowable electric power of the target motor can be determined by the following formula (4):

[0098] (4)

[0099] Among them, in formula (4) Indicates the actual permissible electric power of the target motor; Indicates the actual electric power limit; Indicates the actual charging power limit.

[0100] Optionally, in this embodiment, according to the actual allowable electric power, the current speed and the power generation efficiency value of the target motor, the actual allowable power generation torque value of the target motor is determined by taking the ratio of the actual allowable electric power to the power generation efficiency value as the actual allowable mechanical power of the target motor. According to the actual allowable mechanical power and the current speed of the target motor, the actual allowable power generation torque value of the target motor is determined. In this embodiment, the actual allowable power generation torque value of the target motor can be determined according to the following formula (5):

[0101] (5)

[0102] Among them, in formula (5) Indicates the actual allowable power generation torque value of the target motor; Indicates the actual permissible mechanical power of the target motor; Indicates the current speed of the target motor.

[0103] Optionally, in this embodiment, according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle, the optional implementation method of charging control of the power battery of the target vehicle is: according to the vehicle operating condition of the target vehicle and the actual allowable motor torque value, the target torque and / or target speed of the target motor are determined. Based on the target torque and / or target speed of the target motor, as well as the actual electric power limit value and the charging restriction index, the power battery of the target vehicle is charged and controlled.

[0104] For example, taking the vehicle operating condition of the target vehicle as the parking condition as an example, according to the vehicle operating condition of the target vehicle and the actual allowable motor torque value, an optional implementation method for determining the target torque and / or target speed of the target motor is:

[0105] When the vehicle is in parking condition, by looking up the table Get the speed limit of the engine idle warm-up control ; Obtain the torque limit of the target motor during power generation by looking up the table ; Execute target speed for the engine Control the vehicle powertrain system to transfer the engine torque to the target motor; determine the target torque of the target motor .in, is the engine coolant temperature; is the ambient temperature of the vehicle; When controlling the power battery based on this embodiment, not only the target torque of the target motor is used as a restriction condition (when charging, the torque value of the target motor cannot exceed the target torque), but also the target speed of the engine is required. Control is performed and the speed threshold cannot be exceeded.

[0106] That is to say, in this embodiment, when the vehicle is in the parking condition, the present application can not only realize the charging control of the power battery, but also control the engine warm-up, which not only improves the engine warm-up speed, but also improves the safety of the power battery during charging.

[0107] In this embodiment, the battery heating power limit coefficient of the power battery and the nominal electric power limit of the battery heating device of the power battery are obtained. The product of the battery heating power limit coefficient and the nominal electric power limit is used as the actual electric power limit of the power battery. The actual electric power limit and the actual charging power limit are summed as the actual allowable electric power of the target motor of the target vehicle. The current speed and power generation efficiency value of the target motor are obtained. According to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor, the actual allowable power generation torque value of the target motor is determined. According to the actual allowable power generation torque value, the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is charged and controlled. This embodiment takes into account multiple factors such as the actual allowable power generation torque value, the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle, which not only ensures the safety of the power battery during charging, but also effectively improves the service life of the power battery.

[0108] In one embodiment, if Figure 5 As shown, an optional implementation of the vehicle charging control method is:

[0109] S501, determining a nominal charging current limit value of the power battery of the target vehicle at the current temperature according to the current temperature and the current state of charge of the power battery.

[0110] S502 , taking the product of the power battery cell pressure difference limiting coefficient, the power battery temperature difference limiting coefficient and the power battery voltage limiting coefficient as a limiting weight.

[0111] S503: taking the product of the nominal charging current limit value and the limit weight value as the actual charging current limit value in the charging limit index of the power battery.

[0112] S504: taking the product of the actual charging current limit value and the battery voltage of the power battery as the actual charging power limit value in the charging restriction index of the power battery.

[0113] S505 : Obtain a battery heating power limit coefficient of the power battery and a nominal electric power limit of a battery heating device of the power battery.

[0114] S506: The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery.

[0115] S507 , summing the actual electric power limit and the actual charging power limit as the actual allowable electric power of the target motor of the target vehicle.

[0116] S508, obtaining the current rotation speed and power generation efficiency value of the target motor.

[0117] S509: The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor.

[0118] S510, determining an actual allowable generating torque value of the target motor according to the actual allowable mechanical power and the current rotation speed of the target motor.

[0119] S511, controlling the charging of the power battery of the target vehicle according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0120] In this embodiment, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is obtained. According to the nominal charging current limit value and the charging limit coefficient, the charging limit index of the power battery is determined. According to the charging limit index and the vehicle operating condition of the target vehicle, the charging of the power battery of the target vehicle is controlled. When the power battery of the target vehicle is charged and controlled, the present application not only considers obtaining the nominal charging current limit value of the power battery of the target vehicle at the current temperature, but also determines the charging limit index of the power battery based on the nominal charging current limit value and the charging limit coefficient. Finally, based on the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is charged and controlled, which not only realizes flexible control of the power battery during charging, but also considers more comprehensive factors, avoids the influence of adverse factors on the power battery, and can effectively improve the service life of the power battery.

[0121] Based on the same inventive concept, the embodiment of the present application also provides a vehicle charging control device for implementing the vehicle charging control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiment of a vehicle charging control device provided below can refer to the limitations of the vehicle charging control method above, and will not be repeated here.

[0122] In one embodiment, if Figure 6 As shown, a vehicle charging control device 1 is provided, comprising:

[0123] An acquisition module 10 is used to acquire a nominal charging current limit value of a power battery of a target vehicle at a current temperature;

[0124] The determination module 20 is used to determine the charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient;

[0125] The control module 30 is used to control the charging of the power battery of the target vehicle according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0126] The vehicle charging control device 1 in this embodiment obtains the nominal charging current limit value of the power battery of the target vehicle at the current temperature. According to the nominal charging current limit value and the charging limit coefficient, the charging limit index of the power battery is determined. According to the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging. When the present application controls the charging of the power battery of the target vehicle, it not only considers obtaining the nominal charging current limit value of the power battery of the target vehicle at the current temperature, but also determines the charging limit index of the power battery based on the nominal charging current limit value and the charging limit coefficient. Finally, based on the charging limit index and the vehicle operating condition of the target vehicle, the power battery of the target vehicle is controlled for charging, which not only realizes flexible control of the power battery during charging, but also considers more comprehensive factors, avoids the influence of adverse factors on the power battery, and can effectively improve the service life of the power battery.

[0127] In one embodiment, the Figure 6 The acquisition module 10 is also specifically used for:

[0128] According to the current temperature and the current state of charge of the power battery, a nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined.

[0129] In one embodiment, the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient and a power battery voltage limit coefficient; on this basis, Figure 6 The determining module 20 is further specifically used for:

[0130] The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight;

[0131] The product of the nominal charging current limit value and the limit weight value is used as the actual charging current limit value in the charging limit index of the power battery;

[0132] The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery.

[0133] In one embodiment, the Figure 6 The control module 30 is also specifically used for:

[0134] Obtaining a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery;

[0135] The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery;

[0136] The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0137] In one embodiment, the Figure 6 The control module 30 is also specifically used for:

[0138] The actual electric power limit and the actual charging power limit are summed to obtain the actual allowable electric power of the target motor of the target vehicle;

[0139] Get the current speed and power generation efficiency value of the target motor;

[0140] Determine the actual allowable power generation torque value of the target motor according to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor;

[0141] The charging of the power battery of the target vehicle is controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0142] In one embodiment, the Figure 6 The control module 30 is also specifically used for:

[0143] The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor;

[0144] According to the actual allowable mechanical power and the current rotation speed of the target motor, the actual allowable power generation torque value of the target motor is determined.

[0145] Each module in the above-mentioned vehicle charging control device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0146] In one embodiment, a computer device is provided, whose internal structure diagram can be as follows: Figure 7As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a vehicle charging control method is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0147] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0148] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0149] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0150] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0151] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0152] In one embodiment, when the processor executes the computer program, the following steps are further implemented: obtaining a nominal charging current limit value of the power battery of the target vehicle at the current temperature, including:

[0153] According to the current temperature and the current state of charge of the power battery, a nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined.

[0154] In one embodiment, when the processor executes the computer program, the following steps are further implemented: the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient, and a power battery voltage limit coefficient;

[0155] Accordingly, the charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient, including:

[0156] The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight;

[0157] The product of the nominal charging current limit value and the limit weight value is used as the actual charging current limit value in the charging limit index of the power battery;

[0158] The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery.

[0159] In one embodiment, when the processor executes the computer program, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the charging restriction index and the vehicle operating condition of the target vehicle, including:

[0160] Obtaining a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery;

[0161] The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery;

[0162] The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0163] In one embodiment, when the processor executes the computer program, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the actual electric power limit, the charging limit index and the vehicle operating condition of the target vehicle, including:

[0164] The actual electric power limit and the actual charging power limit are summed to obtain the actual allowable electric power of the target motor of the target vehicle;

[0165] Get the current speed and power generation efficiency value of the target motor;

[0166] Determine the actual allowable power generation torque value of the target motor according to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor;

[0167] The charging of the power battery of the target vehicle is controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0168] In one embodiment, when the processor executes the computer program, the following steps are further implemented: determining the actual allowable power generation torque value of the target motor according to the actual allowable electric power, and the current speed and power generation efficiency value of the target motor, including:

[0169] The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor;

[0170] According to the actual allowable mechanical power and the current rotation speed of the target motor, the actual allowable power generation torque value of the target motor is determined.

[0171] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0172] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0173] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0174] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0175] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: obtaining a nominal charging current limit value of the power battery of the target vehicle at a current temperature, including:

[0176] According to the current temperature and the current state of charge of the power battery, a nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined.

[0177] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient, and a power battery voltage limit coefficient;

[0178] Accordingly, the charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient, including:

[0179] The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight;

[0180] The product of the nominal charging current limit value and the limit weight value is used as the actual charging current limit value in the charging limit index of the power battery;

[0181] The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery.

[0182] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the charging restriction index and the vehicle operating condition of the target vehicle, including:

[0183] Obtaining a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery;

[0184] The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery;

[0185] The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0186] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the actual electric power limit, the charging limit index and the vehicle operating condition of the target vehicle, including:

[0187] The actual electric power limit and the actual charging power limit are summed to obtain the actual allowable electric power of the target motor of the target vehicle;

[0188] Get the current speed and power generation efficiency value of the target motor;

[0189] Determine the actual allowable power generation torque value of the target motor according to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor;

[0190] The charging of the power battery of the target vehicle is controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0191] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the actual allowable power generation torque value of the target motor according to the actual allowable electric power, and the current speed and power generation efficiency value of the target motor, including:

[0192] The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor;

[0193] According to the actual allowable mechanical power and the current rotation speed of the target motor, the actual allowable power generation torque value of the target motor is determined.

[0194] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0195] Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature;

[0196] Determine the charging limit index of the power battery according to the nominal charging current limit value and charging limit coefficient;

[0197] The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

[0198] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: obtaining a nominal charging current limit value of the power battery of the target vehicle at a current temperature, including:

[0199] According to the current temperature and the current state of charge of the power battery, a nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined.

[0200] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: the charging limit coefficient includes a power battery cell pressure difference limit coefficient, a power battery temperature difference limit coefficient, and a power battery voltage limit coefficient;

[0201] Accordingly, the charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient, including:

[0202] The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight;

[0203] The product of the nominal charging current limit value and the limit weight value is used as the actual charging current limit value in the charging limit index of the power battery;

[0204] The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging limit index of the power battery.

[0205] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the charging restriction index and the vehicle operating condition of the target vehicle, including:

[0206] Obtaining a battery heating power limit coefficient of a power battery and a nominal electric power limit of a battery heating device of the power battery;

[0207] The product of the battery heating power limit coefficient and the nominal electric power limit is taken as the actual electric power limit of the power battery;

[0208] The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

[0209] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: charging control of the power battery of the target vehicle is performed according to the actual electric power limit, the charging limit index and the vehicle operating condition of the target vehicle, including:

[0210] The actual electric power limit and the actual charging power limit are summed to obtain the actual allowable electric power of the target motor of the target vehicle;

[0211] Get the current speed and power generation efficiency value of the target motor;

[0212] Determine the actual allowable power generation torque value of the target motor according to the actual allowable electric power, as well as the current speed and power generation efficiency value of the target motor;

[0213] The charging of the power battery of the target vehicle is controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

[0214] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the actual allowable power generation torque value of the target motor according to the actual allowable electric power, and the current speed and power generation efficiency value of the target motor, including:

[0215] The ratio of the actual allowable electric power to the power generation efficiency value is used as the actual allowable mechanical power of the target motor;

[0216] According to the actual allowable mechanical power and the current rotation speed of the target motor, the actual allowable power generation torque value of the target motor is determined.

[0217] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0218] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0219] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A vehicle charging control method, characterized in that: The method comprises: Obtain the nominal charging current limit value of the power battery of the target vehicle at the current temperature; Determining a charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient; The charging of the power battery of the target vehicle is controlled according to the charging restriction index and the vehicle operating condition of the target vehicle.

2. The method according to claim 1, characterized in that The obtaining of the nominal charging current limit value of the power battery of the target vehicle at the current temperature includes: A nominal charging current limit value of the power battery of the target vehicle at the current temperature is determined according to the current temperature and the current state of charge of the power battery.

3. The method according to claim 1, characterized in that The charging limit coefficient includes a power battery single cell pressure difference limit coefficient, a power battery temperature difference limit coefficient and a power battery voltage limit coefficient; Correspondingly, determining the charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient includes: The product of the power battery single cell pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is used as the limit weight; The product of the nominal charging current limit value and the limiting weight value is used as the actual charging current limit value in the charging limiting index of the power battery; The product of the actual charging current limit value and the battery voltage of the power battery is used as the actual charging power limit value in the charging restriction index of the power battery.

4. The method according to claim 1, characterized in that The controlling the charging of the power battery of the target vehicle according to the charging restriction index and the vehicle operating condition of the target vehicle includes: Acquiring a battery heating power limit coefficient of the power battery and a nominal electric power limit of a battery heating device of the power battery; taking the product of the battery heating power limit coefficient and the nominal electric power limit as the actual electric power limit of the power battery; The charging of the power battery of the target vehicle is controlled according to the actual electric power limit, the charging restriction index and the vehicle operating condition of the target vehicle.

5. The method according to claim 4, characterized in that The charging control of the power battery of the target vehicle according to the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle includes: summing the actual electric power limit value and the actual charging power limit value as the actual allowable electric power of the target motor of the target vehicle; Obtaining the current speed and power generation efficiency value of the target motor; Determining an actual allowable power generation torque value of the target motor according to the actual allowable electric power, and a current speed and power generation efficiency value of the target motor; The power battery of the target vehicle is charged and controlled according to the actual allowable power generation torque value, the actual electric power limit value, the charging restriction index and the vehicle operating condition of the target vehicle.

6. The method according to claim 5, characterized in that Determining the actual allowable power generation torque value of the target motor according to the actual allowable electric power, and the current speed and power generation efficiency value of the target motor includes: Taking the ratio of the actual allowable electric power to the power generation efficiency value as the actual allowable mechanical power of the target motor; An actual allowable power generation torque value of the target motor is determined according to the actual allowable mechanical power and the current rotation speed of the target motor.

7. A vehicle charging control device, characterized in that: The device comprises: An acquisition module, used to acquire a nominal charging current limit value of a power battery of a target vehicle at a current temperature; A determination module, used to determine a charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient; A control module is used to control the charging of the power battery of the target vehicle according to the charging restriction index and the vehicle operating condition of the target vehicle.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the vehicle charging control method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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