Vehicle charging control method, device and computer equipment

Abstract

The application relates to a vehicle charging control method and device, computer equipment and a storage medium. It belongs to the technical field of vehicle control. The method comprises the following steps: obtaining a nominal charging current limit value of a power battery at a current temperature; determining a charging limit index of the power battery according to the nominal charging current limit value and a charging limit coefficient; and performing charging control on the power battery of a target vehicle according to the charging limit index and a vehicle working condition of the target vehicle. When the charging control is performed on the power battery of the target vehicle, not only is the nominal charging current limit value of the power battery of the target vehicle at the current temperature obtained, but also the charging limit index of the power battery is determined based on the nominal charging current limit value and the charging limit coefficient, and finally the charging control is performed on the power battery of the target vehicle based on the charging limit index and the vehicle working condition of the target vehicle. The considered 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 technical field of vehicle control, in particular to a vehicle charging control method and device and computer equipment. BACKGROUND

[0002] Hybrid electric vehicle (HEV) refers to a vehicle whose driving system is composed of two or more single driving systems that can operate simultaneously. The power for vehicle driving is provided by single driving systems alone or jointly according to the actual vehicle operating state. The commonly used hybrid electric vehicle generally refers to an oil-electric hybrid vehicle, which uses a traditional internal combustion engine and an electric motor as power sources.

[0003] When the power battery of the hybrid vehicle is at a low temperature, the activity of the chemical substances in the power battery is greatly reduced. In this case, in order to improve the power conversion efficiency, the power battery is generally heated. The charging efficiency of the power battery can be improved under heating. However, the existing technology does not consider the influence of other factors on the charging of the power battery, and only considers heating, which leads to the fact that the charging of the power battery does not consider all factors, and the service life of the power battery is seriously affected. SUMMARY

[0004] Therefore, it is necessary to provide a vehicle charging control method and device for improving the service life of the power battery.

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

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

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

[0008] controlling the charging of the power battery of the target vehicle according to the charging limit index and a vehicle operating condition of the target vehicle.

[0009] In one embodiment, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is obtained, comprising:

[0010] determining the nominal charging current limit value of the power battery of the target vehicle at the current temperature according to the current temperature and a current state of charge of the power battery.

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

[0012] Correspondingly, 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 result between the power battery single cell differential pressure limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is taken as a limit weight value;

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

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

[0016] In one of the embodiments, the charging control of the power battery of the target vehicle is performed according to the charging limit index and the vehicle working condition of the target vehicle, including:

[0017] The battery heating power limit value coefficient of the power battery and the nominal electric power limit value of the battery heating device of the power battery are obtained;

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

[0019] The charging control of the power battery of the target vehicle is performed according to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle.

[0020] In one of the embodiments, the charging control of the power battery of the target vehicle is performed according to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, including:

[0021] The actual electric power limit value and the actual charging power limit value are summed up as an actual allowed electric power of a target motor of the target vehicle;

[0022] The current rotating speed and the power generation efficiency value of the target motor are obtained;

[0023] The actual allowed power generation torque value of the target motor is determined according to the actual allowed electric power, and the current rotating speed and the power generation efficiency value of the target motor;

[0024] The charging control of the power battery of the target vehicle is performed according to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle.

[0025] In one of the embodiments, the actual allowed power generation torque value of the target motor is determined according to the actual allowed electric power, and the current rotating speed and the power generation efficiency value of the target motor, including:

[0026] The ratio of the actual allowed electric power and the power generation efficiency value is taken as the actual allowed mechanical power of the target motor;

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

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

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

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

[0031] A control module is configured to perform charging control on the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

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

[0033] An acquisition module is configured to acquire a nominal charging current limit value of a power battery of a target vehicle at a current temperature;

[0034] A determination module is configured to determine a charging limit index of the power battery according to the nominal charging current limit value and a charging limit coefficient;

[0035] A control module is configured to perform charging control on the power battery of the target vehicle according to the charging limit index and a vehicle working 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 the computer program is executed by a processor to implement the following steps:

[0037] An acquisition module is configured to acquire a nominal charging current limit value of a power battery of a target vehicle at a current temperature;

[0038] A determination module is configured to determine a charging limit index of the power battery according to the nominal charging current limit value and a charging limit coefficient;

[0039] A control module is configured to perform charging control on the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

[0040] In a fifth aspect, the present application further provides a computer program product. The computer program product comprises a computer program, and the computer program is executed by a processor to implement the following steps:

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

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

[0043] perform charging control on the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

[0044] The vehicle charging control method, device and computer equipment obtain a nominal charging current limit value of the power battery of the target vehicle at a current temperature. The charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient. The charging control is performed on the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle. When the charging control is performed on the power battery of the target vehicle, not only the nominal charging current limit value of the power battery of the target vehicle at the current temperature is considered, but also the charging limit index of the power battery is determined based on the nominal charging current limit value and the charging limit coefficient. Finally, the charging control is performed on the power battery of the target vehicle based on the charging limit index and the vehicle working condition of the target vehicle. The flexible control of the charging of the power battery is realized. The factors considered are more comprehensive. The influence of the adverse factors on the power battery is avoided. The service life of the power battery can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 An application environment diagram of the vehicle charging control method provided for the embodiment is shown in the figure;

[0046] Figure 2 A flowchart of the first vehicle charging control method provided for the embodiment is shown in the figure;

[0047] Figure 3 A flowchart of the determination of the actual charging power limit value in the charging limit index of the power battery is shown in the figure;

[0048] Figure 4 A flowchart of the charging control on the power battery of the target vehicle is shown in the figure;

[0049] Figure 5 A flowchart of the second vehicle charging control method provided for the embodiment is shown in the figure;

[0050] Figure 6 A structure block diagram of the vehicle charging control device provided for the embodiment is shown in the figure;

[0051] Figure 7 An internal structure diagram of the computer equipment provided for the embodiment is shown in the figure. DETAILED DESCRIPTION

[0052] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

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

[0054] The server 104 can be implemented by an independent server or a server cluster composed of multiple servers.

[0055] The target vehicle 102 refers mainly to a hybrid vehicle. The hybrid vehicle refers to a vehicle whose driving system is composed of two or more single driving systems that can operate simultaneously, and the power for vehicle travel is provided by the single driving systems alone or jointly according to the actual vehicle operating state. The commonly used hybrid vehicle generally refers to an oil-electric hybrid vehicle, which uses a traditional internal combustion engine and an electric motor as power sources.

[0056] In one of the embodiments, as shown in Figure 2 , a vehicle charging control method is provided. For example, the method is applied to the server in Figure 1 . As shown in Figure 2 , the method comprises the following steps:

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

[0058] The target vehicle refers to a hybrid electric vehicle (HEV) that needs to be controlled. The power battery refers to the power battery of the target vehicle. The power battery refers to a device for storing electric energy in a hybrid electric vehicle; these batteries are an important part of the hybrid power system, which provides power for the vehicle together with the traditional internal combustion engine. The current temperature refers to the ambient temperature of the target vehicle at the current time. 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 document.

[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, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is obtained by searching a three-dimensional table according to the content recorded in the three-dimensional table. SOC represents the current state of charge; represents the current temperature, which is also the current temperature of the power battery.

[0061] S202, determining the charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient.

[0062] The charging limit coefficient indicates the limit coefficient of the power battery during charging. The charging limit index refers to the relevant index as a charging constraint condition when the power battery is charging.

[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 a neural network model, and the charging limit index of the power battery is output by the neural network model.

[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 taken as the charging limit index of the power battery.

[0065] S203, performing charging control on the power battery of the target vehicle according to the charging limit index and the vehicle operating condition of the target vehicle.

[0066] The operating condition of the target vehicle, the vehicle operating condition in the present application, is divided into a parking operating condition and a driving operating condition. The parking operating condition refers to the operating condition corresponding to the parking state of the target vehicle. The driving operating condition refers to the operating condition corresponding to the driving state of the target vehicle.

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

[0068] ​The vehicle charging control method obtains a nominal charging current limit value of a power battery of a target vehicle at a current temperature. A charging limit index of the power battery is determined according to the nominal charging current limit value and a charging limit coefficient. The power battery of the target vehicle is controlled according to the charging limit index and a vehicle working condition of the target vehicle. When the power battery of the target vehicle is controlled, the nominal charging current limit value of the power battery of the target vehicle at the current temperature is considered, the charging limit index of the power battery is determined based on the nominal charging current limit value and the charging limit coefficient, and the power battery of the target vehicle is controlled based on the charging limit index and the vehicle working condition of the target vehicle. Therefore, flexible control of the power battery during charging is realized, more factors are considered, the influence of adverse factors on the power battery is avoided, and the service life of the power battery is effectively improved.

[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. To more accurately determine the charging limit index, the power battery cell pressure difference limit coefficient, the power battery temperature difference limit coefficient, and the power battery voltage limit coefficient are multiplied to obtain a limit weight value. Figure 3 As shown in FIG. 2, one optional embodiment of S202 includes the following steps.

[0070] S301, 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 taken as the limit weight value.

[0071] The limit weight value is a weight value for balancing and optimizing the nominal charging current limit value.

[0072] Optionally, in the embodiment, the power battery cell pressure difference limit coefficient is obtained by a table lookup method. The power battery cell pressure difference limit coefficient is obtained by a table lookup method. The power battery temperature difference limit coefficient is obtained by a table lookup method. The power battery temperature difference limit coefficient is obtained by a table lookup method. The power battery voltage limit coefficient is obtained by a table lookup method. The power battery voltage limit coefficient is obtained by a table lookup method. The power battery voltage limit coefficient is obtained by a table lookup method. The maximum power battery cell voltage is Vmax. The minimum power battery cell voltage is Vmin. The maximum power battery cell temperature is Tmax. The minimum power battery cell temperature is Tmin. The power battery terminal voltage is U. , , The data in the table is provided by the power battery manufacturer or calibrated according to the characteristics of the power battery.

[0073] Optionally, the product of the power battery monomer pressure difference limiting coefficient, the power battery temperature difference limiting coefficient and the power battery voltage limiting coefficient is calculated in sequence in the embodiment, and the product result obtained after the multiplication operation is taken as the limiting weight value.

[0074] S302, the product result of the nominal charging current limit value and the limiting weight value is taken as the actual charging current limit value in the charging limiting index of the power battery.

[0075] The actual charging current limit value refers to the maximum charging current of the power battery in the actual charging process.

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

[0077] (1)

[0078] In formula (1), the actual charging current limit value is represented by I, and the other characters have been described in detail in the above embodiment and will not be repeated here.

[0079] S303, the product result of the actual charging current limit value and the battery voltage of the power battery is taken as the actual charging power limit value in the charging limiting index of the power battery.

[0080] The actual charging power limit value refers to the maximum charging power of the power battery in the actual charging process.

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

[0082] (2)

[0083] In formula (2), the actual charging power limit value is represented by P, and the other characters have been described in detail in the above embodiment and will not be repeated here. The battery voltage of the power battery is represented by U.

[0084] ​​In the embodiment, the charging restriction coefficient includes the power battery single cell pressure difference restriction coefficient, the power battery temperature difference restriction coefficient and the power battery voltage restriction coefficient, and a product of the power battery single cell pressure difference restriction coefficient, the power battery temperature difference restriction coefficient and the power battery voltage restriction coefficient is taken as a restriction weight. A product of the nominal charging current limit value and the restriction weight is taken as an actual charging current limit value in the charging restriction index of the power battery. A product of the actual charging current limit value and the battery voltage of the power battery is taken as an actual charging power limit value in the charging restriction index of the power battery. The obtained charging restriction index is more accurate, and the charging control of the power battery based on the charging restriction index can effectively improve the service life of the power battery.

[0085] In one of the embodiments, in order to more effectively control the charging of the power battery and improve the service life of the power battery, as shown in Figure 4 An optional implementation of S203 includes:

[0086] S401, obtaining a battery heating power limit value coefficient of the power battery and a nominal electric power limit value of a battery heating device of the power battery.

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

[0088] Optionally, in the embodiment, the nominal electric power limit value of the battery heating device is obtained through calibration , and the battery heating power limit value coefficient is obtained through table lookup . The nominal electric power limit value is calibrated and obtained from the nominal power value or the test power value of the battery heating device. The data in the table is provided by the power battery manufacturer or calibrated according to the characteristics of the power battery.

[0089] S402, taking a product of the battery heating power limit value coefficient and the nominal electric power limit value as an actual electric power limit value of the power battery.

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

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

[0092] (3)

[0093] In formula (3), the actual electric power limit value of the power battery is determined according to the following formula (3): represents the actual electric power limit value.

[0094] S403, according to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, performing charging control on the power battery of the target vehicle.

[0095] Optionally, in the embodiment, the actual electric power limit value and the actual charging power limit value are summed up as the actual allowed electric power of the target motor of the target vehicle. The current rotating speed and the power generation efficiency value of the target motor are obtained. According to the actual allowed electric power, and the current rotating speed and the power generation efficiency value of the target motor, the actual allowed power generation torque value of the target motor is determined. According to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, the charging control on the power battery of the target vehicle is performed.

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

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

[0098] (4)

[0099] In the formula (4), P represents the actual allowed electric power of the target motor; P limit represents the actual electric power limit value; and P charge represents the actual charging power limit value.

[0100] Optionally, in the embodiment, the optional implementation manner of determining the actual allowed power generation torque value of the target motor according to the actual allowed electric power, and the current rotating speed and the power generation efficiency value of the target motor is that the ratio of the actual allowed electric power to the power generation efficiency value is taken as the actual allowed mechanical power of the target motor. According to the actual allowed mechanical power and the current rotating speed of the target motor, the actual allowed power generation torque value of the target motor is determined. In the embodiment, the actual allowed power generation torque value of the target motor can be determined according to the following formula (5):

[0101] (5)

[0102] In the formula (5), T represents the actual allowed power generation torque value of the target motor; P represents the actual allowed mechanical power of the target motor; and n represents the current rotating speed of the target motor.

[0103] ​​​​​​Optionally, in the embodiment, the optional implementation of the charging control of the power battery of the target vehicle according to the actual allowed electric power limit value, the charging limit index, and the vehicle working condition of the target vehicle is: determining the target torque and / or target speed of the target motor according to the vehicle working condition of the target vehicle and the actual allowed motor torque value. The charging control of the power battery of the target vehicle is performed based on the target torque and / or target speed of the target motor, and the actual electric power limit value and the charging limit index.

[0104] For example, in the case of the vehicle working condition of the target vehicle being the parking working condition, the optional implementation of determining the target torque and / or target speed of the target motor according to the vehicle working condition of the target vehicle and the actual allowed motor torque value is:

[0105] In the case of the vehicle working condition being the parking working condition, the target torque and / or target speed of the target motor are determined by table lookup to obtain the speed limit value of the engine idle warming control to obtain the torque limit value of the target motor during power generation by table lookup to perform the target speed control of the engine to control the vehicle power transmission system so that the engine torque is transmitted to the target motor to determine the target torque of the target motor is the engine coolant temperature; is the ambient temperature of the vehicle; is the engine temperature. When the power battery is controlled according to the embodiment, not only the target torque of the target motor is used as a limiting condition (the torque value of the target motor cannot exceed the target torque during charging), but also the target speed of the engine is controlled and cannot exceed the speed threshold.

[0106] That is, in the case of the vehicle working condition being the parking working condition, the application can not only control the charging of the power battery, but also control the warming of the engine. Not only the warming speed of the engine is improved, but also the safety of the power battery during charging is improved.

[0107] In this embodiment, the battery heating power limit coefficient of the power battery and the nominal electric power limit value 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 value is taken as the actual electric power limit value of the power battery. The actual electric power limit value and the actual charging power limit value are summed up as the actual allowed electric power of the target motor of the target vehicle. The current speed and the power generation efficiency value of the target motor are obtained. According to the actual allowed electric power, and the current speed and the power generation efficiency value of the target motor, the actual allowed power generation torque value of the target motor is determined. According to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled, and the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle are considered in this embodiment. The safety of the power battery during charging is ensured, and the service life of the power battery is effectively improved.

[0108] In one embodiment, as shown in Figure 5 An optional embodiment of the vehicle charging control method is as follows:

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

[0110] S502, the product of the power battery single cell differential pressure limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient is taken as the limit weight.

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

[0112] S504, the product of the actual charging current limit value and the battery voltage of the power battery is taken as the actual charging power limit value in the charging limit index of the power battery.

[0113] S505, the battery heating power limit coefficient of the power battery and the nominal electric power limit value of the battery heating device of the power battery are obtained.

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

[0115] S507, the actual electric power limit value and the actual charging power limit value are summed up as the actual allowed electric power of the target motor of the target vehicle.

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

[0117] S509, take the ratio of the actual allowed electric power and the power generation efficiency value as the actual allowed mechanical power of the target motor.

[0118] S510, determine the actual allowed power generation torque value of the target motor according to the actual allowed mechanical power and the current speed of the target motor.

[0119] S511, perform charging control on the power battery of the target vehicle according to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index, and the vehicle working 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. The charging limit index of the power battery is determined according to the nominal charging current limit value and the charging limit coefficient. The charging control is performed on the power battery of the target vehicle according to the charging limit index and the vehicle working condition of the target vehicle. When performing the charging control on the power battery of the target vehicle, the present application not only considers 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, and finally performs the charging control on the power battery of the target vehicle based on the charging limit index and the vehicle working condition of the target vehicle. Not only the flexible control during the charging of the power battery is realized, but also the factors considered are more comprehensive, and the influence of the adverse factors on the power battery is avoided, so that the service life of the power battery can be effectively improved.

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

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

[0123] The acquisition module 10 is configured to obtain a nominal charging current limit value of a power battery of a target vehicle at a current temperature.

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

[0125] The control module 30 is configured to perform charging control on the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

[0126] The vehicle charging control device 1 in the embodiment obtains a 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 a charging limit coefficient, a charging limit index of the power battery is determined. According to the charging limit index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled. When the power battery of the target vehicle is controlled, the application not only considers 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, and finally controls the power battery of the target vehicle based on the charging limit index and the vehicle working condition of the target vehicle. Not only the flexible control of the power battery charging is realized, but also the factors are more comprehensive, and the influence of the adverse factors on the power battery is avoided, so that the service life of the power battery can be effectively improved.

[0127] In one of the embodiments, the obtaining module 10 in the above Figure 6 is further specifically used for:

[0128] determining the 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.

[0129] In one of the embodiments, the charging limit coefficient includes a power battery monomer pressure difference limit coefficient, a power battery temperature difference limit coefficient and a power battery voltage limit coefficient. On this basis, the determining module 20 in the above Figure 6 is further specifically used for:

[0130] taking the product result between the power battery monomer pressure difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient as a limit weight value;

[0131] taking the product result of the nominal charging current limit value and the limit weight value as an actual charging current limit value in the charging limit index of the power battery;

[0132] taking the product result of the actual charging current limit value and the battery voltage of the power battery as an actual charging power limit value in the charging limit index of the power battery.

[0133] In one of the embodiments, the control module 30 in the above Figure 6 is further specifically used for:

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

[0135] taking the product result of the battery heating power limit value coefficient and the nominal electric power limit value as an actual electric power limit value of the power battery;

[0136] According to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled.

[0137] In one of the embodiments, the control module 30 in the above Figure 6 is further specifically configured to:

[0138] Summing the actual electric power limit value and the actual charging power limit value as the actual allowed electric power of the target motor of the target vehicle;

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

[0140] According to the actual allowed electric power, and the current rotating speed and the power generation efficiency value of the target motor, determining the actual allowed power generation torque value of the target motor;

[0141] According to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled.

[0142] In one of the embodiments, the control module 30 in the above Figure 6 is further specifically configured to:

[0143] Taking the ratio of the actual allowed electric power and the power generation efficiency value as the actual allowed mechanical power of the target motor;

[0144] According to the actual allowed mechanical power and the current rotating speed of the target motor, determining the actual allowed power generation torque value of the target motor.

[0145] The above various modules in the vehicle charging control device can be realized by software, hardware and combinations thereof in whole or in part. The above various modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above various modules.

[0146] In one embodiment, a computer device is provided, and an internal structure diagram thereof can be as shown in Figure 7The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected through a system bus. The communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. The processor of the computer device is configured 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 running the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to perform wired or wireless communication with external terminals. The wireless communication can be achieved through WIFI, mobile cellular network, NFC (Near Field Communication), or other technologies. The computer program is executed by the processor to implement a vehicle charging control method. The display unit of the computer device is configured 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. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball, or touchpad arranged on the shell of the computer device. The input device can also be an external keyboard, touchpad, or mouse, etc.

[0147] Those skilled in the art can understand that Figure 7 The skilled in the art can understand that

[0148] In one embodiment, a computer device is provided, including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the following steps:

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

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

[0151] controlling charging of the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

[0152] In one embodiment, the processor executing the computer program further implements the following steps: obtaining a nominal charging current limit value of the power battery of the target vehicle at a 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, the processor, when executing the computer program, also implements the following steps: the charging restriction coefficient includes a power battery monomer pressure difference restriction coefficient, a power battery temperature difference restriction coefficient, and a power battery voltage restriction coefficient;

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

[0156] The product result between the power battery monomer pressure difference restriction coefficient, the power battery temperature difference restriction coefficient, and the power battery voltage restriction coefficient is taken as a restriction weight value;

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

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

[0159] In one embodiment, the processor, when executing the computer program, also implements the following steps: according to the charging restriction index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled to charge, including:

[0160] The battery heating power limit value coefficient of the power battery and the nominal electric power limit value of the battery heating device of the power battery are obtained;

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

[0162] According to the actual electric power limit value, the charging restriction index, and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled to charge.

[0163] In one embodiment, the processor, when executing the computer program, also implements the following steps: according to the actual electric power limit value, the charging restriction index, and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled to charge, including:

[0164] The actual electric power limit value and the actual charging power limit value are summed up as an actual allowed electric power of a target motor of the target vehicle;

[0165] The current rotating speed of the target motor and the power generation efficiency value are obtained;

[0166] According to the actual allowed electric power, and the current rotating speed of the target motor and the power generation efficiency value, an actual allowed power generation torque value of the target motor is determined.

[0167] According to the actual allowed electric power, the current speed of the target motor and the generation efficiency value, the actual allowed generation torque value of the target motor is determined, including:

[0168] In one embodiment, the processor when executing the computer program also implements the following steps: according to the actual allowed electric power, the current speed of the target motor and the generation efficiency value, the actual allowed generation torque value of the target motor is determined, including:

[0169] The ratio of the actual allowed electric power and the generation efficiency value is taken as the actual allowed mechanical power of the target motor;

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

[0171] In one embodiment, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0172] The nominal charge current limiting value of the power battery of the target vehicle at the current temperature is obtained;

[0173] According to the nominal charge current limiting value and the charge limiting coefficient, the charge limiting index of the power battery is determined.

[0174] According to the charge limiting index and the vehicle working condition of the target vehicle, the power battery of the target vehicle is controlled.

[0175] In one embodiment, the processor when executing the computer program also implements the following steps: the nominal charge current limiting value of the power battery of the target vehicle at the current temperature is obtained, including:

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

[0177] In one embodiment, the processor when executing the computer program also implements the following steps: the charge limiting coefficient includes a power battery single cell pressure difference limiting coefficient, a power battery temperature difference limiting coefficient and a power battery voltage limiting coefficient;

[0178] Correspondingly, according to the nominal charge current limiting value and the charge limiting coefficient, the charge limiting index of the power battery is determined, including:

[0179] The product result between the power battery single cell pressure difference limiting coefficient, the power battery temperature difference limiting coefficient and the power battery voltage limiting coefficient is taken as the limiting weight value;

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

[0182] In one embodiment, the computer program, when executed by the processor, further implements the following steps: 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, including:

[0183] An actual battery heating power limit value coefficient of the power battery and a nominal electric power limit value of a battery heating device of the power battery are obtained.

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

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

[0186] In one embodiment, the computer program, when executed by the processor, further implements the following steps: performing charging control on the power battery of the target vehicle according to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, including:

[0187] The actual electric power limit value and the actual charging power limit value are summed up as an actual allowed electric power of a target motor of the target vehicle.

[0188] A current rotating speed of the target motor and a power generation efficiency value are obtained.

[0189] An actual allowed power generation torque value of the target motor is determined according to the actual allowed electric power and the current rotating speed and the power generation efficiency value of the target motor.

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

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

[0192] The ratio of the actual allowed electric power to the power generation efficiency value is taken as an actual allowed mechanical power of the target motor.

[0193] The actual allowed power generation torque value of the target motor is determined according to the actual allowed mechanical power and the current rotating speed of the target motor.

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

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

[0197] controlling charging of the power battery of the target vehicle according to the charging limit index and a vehicle working condition of the target vehicle.

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

[0199] determining the nominal charging current limit value of the power battery of the target vehicle at the current temperature according to the current temperature and a current state of charge of the power battery.

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

[0201] Correspondingly, determining the charging limit index of the power battery according to the nominal charging current limit value and the charging limit coefficient, comprises:

[0202] taking a product result between the power battery cell voltage difference limit coefficient, the power battery temperature difference limit coefficient and the power battery voltage limit coefficient as a limit weight;

[0203] taking a product result of the nominal charging current limit value and the limit weight as an actual charging current limit value in the charging limit index of the power battery;

[0204] taking a product result of the actual charging current limit value and a battery voltage of the power battery as an actual charging power limit value in the charging limit index of the power battery.

[0205] In one embodiment, the computer program, when executed by the processor, further implements the following steps: controlling charging of the power battery of the target vehicle according to the charging limit index and the vehicle working condition of the target vehicle, comprising:

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

[0207] taking a product result of the battery heating power limit coefficient and the nominal electric power limit value as an actual electric power limit value of the power battery.

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

[0209] In one embodiment, the computer program, when executed by the processor, further implements the following steps: controlling the power battery of the target vehicle according to the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle, comprising:

[0210] Summing the actual electric power limit value and the actual charging power limit value as an actual allowed electric power of a target motor of the target vehicle;

[0211] Obtaining a current rotating speed and a power generation efficiency value of the target motor;

[0212] Determining an actual allowed power generation torque value of the target motor according to the actual allowed electric power and the current rotating speed and the power generation efficiency value of the target motor;

[0213] Controlling the power battery of the target vehicle according to the actual allowed power generation torque value, the actual electric power limit value, the charging limit index and the vehicle working condition of the target vehicle.

[0214] In one embodiment, the computer program, when executed by the processor, further implements the following steps: determining an actual allowed power generation torque value of the target motor according to the actual allowed electric power and the current rotating speed and the power generation efficiency value of the target motor, comprising:

[0215] Taking a ratio of the actual allowed electric power and the power generation efficiency value as an actual allowed mechanical power of the target motor;

[0216] Determining an actual allowed power generation torque value of the target motor according to the actual allowed mechanical power and the current rotating speed of the target motor.

[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. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present 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 storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric 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 but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0218] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0219] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A vehicle charging control method, characterized in that, The method includes: Obtain the nominal charging current limit value of the target vehicle's power battery at the current temperature; Based on the nominal charging current limit value and charging limit coefficient, the charging limit index of the power battery is determined; wherein, the charging limit coefficient includes the power battery cell voltage difference limit coefficient, the power battery temperature difference limit coefficient, and the power battery voltage limit coefficient; correspondingly, determining the charging limit index of the power battery based on the nominal charging current limit value and charging limit coefficient includes: using the product of the power battery cell voltage difference limit coefficient, the power battery temperature difference limit coefficient, and the power battery voltage limit coefficient as the limit weight; using the product of the nominal charging current limit value and the limit weight as the actual charging current limit value in the charging limit index of the power battery; and using 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 limit index of the power battery. Based on the charging limitation index and the vehicle operating condition of the target vehicle, charging control is performed on the power battery of the target vehicle, including: obtaining the battery heating power limit coefficient of the power battery and the nominal power limit of the battery heating device of the power battery; taking the product of the battery heating power limit coefficient and the nominal power limit as the actual power limit of the power battery; and performing charging control on the power battery of the target vehicle based on the actual power limit, the charging limitation index, and the vehicle operating condition of the target vehicle; wherein, the step of charging control based on the actual power limit, the charging limitation index, and the vehicle operating condition of the target vehicle... The system controls the charging of the target vehicle's power battery based on the vehicle's operating conditions, including: summing the actual power limit and the actual charging power limit to obtain the actual allowable power of the target motor; acquiring the current speed and power generation efficiency of the target motor; determining the actual allowable torque value of the target motor based on the actual allowable power, the current speed and power generation efficiency of the target motor; and controlling the charging of the target vehicle's power battery based on the actual allowable torque value, the actual power limit, the charging limit index, and the vehicle's operating conditions.

2. The method according to claim 1, characterized in that, The process of obtaining the nominal charging current limit value of the target vehicle's power battery at the current temperature includes: Based on the current temperature and the current state of charge of the power battery, determine the nominal charging current limit value of the target vehicle's power battery at the current temperature.

3. The method according to claim 1, characterized in that, The step of determining the actual allowable power output torque value of the target motor based on the actual allowable power output, the current speed of the target motor, and the power generation efficiency value includes: The ratio of the actual allowable electrical power to the power generation efficiency value is taken as the actual allowable mechanical power of the target motor; The actual allowable generating torque value of the target motor is determined based on the actual allowable mechanical power and the current speed of the target motor.

4. A vehicle charging control device, characterized in that, The device includes: The acquisition module is used to acquire the nominal charging current limit value of the target vehicle's power battery at the current temperature; The determining module is used to determine the charging limitation index of the power battery based on the nominal charging current limit value and the charging limitation coefficient; wherein, the charging limitation coefficient includes the power battery cell voltage difference limitation coefficient, the power battery temperature difference limitation coefficient, and the power battery voltage limitation coefficient; correspondingly, determining the charging limitation index of the power battery based on the nominal charging current limit value and the charging limitation coefficient includes: using the product of the power battery cell voltage difference limitation coefficient, the power battery temperature difference limitation coefficient, and the power battery voltage limitation coefficient as the limitation weight; using the product of the nominal charging current limit value and the limitation weight as the actual charging current limit value in the charging limitation index of the power battery; and using 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 limitation index of the power battery. A control module is configured to control the charging of the power battery of the target vehicle based on the charging limit indicators and the vehicle operating conditions of the target vehicle, including: obtaining the battery heating power limit coefficient of the power battery and the nominal power limit of the battery heating device of the power battery; taking the product of the battery heating power limit coefficient and the nominal power limit as the actual power limit of the power battery; and controlling the charging of the power battery of the target vehicle based on the actual power limit, the charging limit indicators, and the vehicle operating conditions of the target vehicle; wherein, the step of controlling the charging of the power battery based on the actual power limit and the charging limit indicators... Based on the vehicle operating conditions of the target vehicle, the charging control of the target vehicle's power battery includes: summing the actual power limit and the actual charging power limit to obtain the actual allowable power of the target motor of the target vehicle; obtaining the current speed and power generation efficiency value of the target motor; determining the actual allowable torque value of the target motor based on the actual allowable power, the current speed and power generation efficiency value of the target motor; and controlling the charging of the target vehicle's power battery based on the actual allowable torque value, the actual power limit, the charging limit index, and the vehicle operating conditions of the target vehicle.

5. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the vehicle charging control method according to any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

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