Charging method and device for electric vehicle, medium and electric vehicle

Abstract

Embodiments of the present application disclose a charging method and device of an electric vehicle, a medium and the electric vehicle, and relate to the technical field of charging. The method comprises: obtaining a charging start time and a charging end time of the electric vehicle; determining a charging time period of the electric vehicle according to the charging start time, the charging end time and temperature information, wherein the temperature information comprises an ambient temperature between the charging start time and the charging end time; determining a charging request power according to a battery temperature in the charging time period; and indicating the charging request power to a charger. The method can charge the electric vehicle in a suitable ambient temperature, reduce energy consumption required for operation of a cooling system, and improve charging efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a charging method and device of an electric vehicle, a medium and the electric vehicle. BACKGROUND

[0002] In the process of daily use of the electric vehicle by the user, the AC slow charging of the electric vehicle is the most common use scenario. In the summer high temperature scenario, the battery and the charger are at a high temperature after driving, and if the charging is immediately started at a large current at this time, a safety hazard will be caused.

[0003] In the summer high temperature scenario, after the charger starts to charge the electric vehicle, the electric vehicle requests the cooling system to work to reduce the temperature of the battery and the charger.

[0004] However, in the related art, the working of the cooling system will cause energy consumption, resulting in low charging efficiency of the electric vehicle. SUMMARY

[0005] The present application provides a charging method, device, medium and electric vehicle of an electric vehicle, which can set the charging time period of the electric vehicle in advance, and the environmental temperature in the charging time period is suitable for the charging of the electric vehicle, so that the charging efficiency can be effectively improved. The method comprises the following steps:

[0006] According to another aspect of the present application, a charging method of an electric vehicle is provided, which comprises the following steps:

[0007] obtaining a charging start time and a charging end time of the electric vehicle;

[0008] determining a charging time period of the electric vehicle according to the charging start time, the charging end time and temperature information, wherein the temperature information comprises an environmental temperature between the charging start time and the charging end time;

[0009] determining a charging request power according to a battery temperature in the charging time period;

[0010] indicating the charging request power to a charger.

[0011] According to another aspect of the present application, a charging device of an electric vehicle is provided, which comprises the following steps:

[0012] an obtaining module, configured to obtain a charging start time and a charging end time of the electric vehicle;

[0013] The computing module is configured to determine a charging time period of the electric vehicle according to the charging start time, the charging end time and air temperature information, the air temperature information including an ambient air temperature between the charging start time and the charging end time.

[0014] The computing module is further configured to determine a charging request power according to a battery temperature within the charging time period.

[0015] The indicating module is configured to indicate the charging request power to a charger.

[0016] In an optional design, the computing module is further configured to predict a charging expected duration according to an allowed charging power and a charging efficiency of the charger; and determine the charging time period between the charging start time and the charging end time according to the air temperature information and the charging expected duration, a total duration of the charging time period being not less than the charging expected duration.

[0017] In an optional design, the computing module is further configured to determine a charging temperature interval according to the air temperature information, the charging temperature interval being used to represent an ambient temperature suitable for charging of the electric vehicle; and determine the charging time period between the charging start time and the charging end time according to the charging temperature interval, a total duration of the charging time period being not less than the charging expected duration.

[0018] In an optional design, the computing module is further configured to determine the charging request power from a relationship table according to the battery temperature, the relationship table being used to record a corresponding relationship between the battery temperature and the charging request power; and correct the charging request power according to battery temperature rise data and charger temperature rise data.

[0019] In an optional design, the computing module is further configured to decrease the charging request power in a case that the battery temperature rise data is greater than a first temperature rise threshold or the charger temperature rise data is greater than a second temperature rise threshold; or increase the charging request power in a case that the battery temperature rise data is less than the first temperature rise threshold and the charger temperature rise data is less than the second temperature rise threshold.

[0020] In an optional design, the obtaining module is further configured to display an intelligent charging option in a case that the battery temperature is greater than a first temperature threshold and a charger temperature is greater than a second temperature threshold; display a time option in response to a determination operation on the intelligent charging option; and obtain the charging start time and the charging end time in response to a time input operation on the time option.

[0021] In an alternative design, the computing module is further configured to count the actual charging duration, and calculate the saved power according to the difference between the actual charging duration and the expected charging duration and the charging request power.

[0022] According to another aspect of the present application, there is provided an electric vehicle, comprising a processor and a memory, the memory storing at least one instruction, at least one program, a code set or an instruction set, the at least one instruction, at least one program, code set or instruction set being loaded and executed by the processor to implement the charging method of the electric vehicle according to the above aspect.

[0023] According to another aspect of the present application, there is provided a computer storage medium, the computer readable storage medium storing at least one program code, the program code being loaded and executed by a processor to implement the charging method of the electric vehicle according to the above aspect.

[0024] According to another aspect of the present application, there is provided a computer program product or computer program, the computer program product or computer program comprising computer instructions, the computer instructions being stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the charging method of the electric vehicle according to the above aspect.

[0025] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0026] The charging time period of the electric vehicle is determined between the charging start time and the charging end time of the electric vehicle according to the ambient temperature, and the electric vehicle is charged within the charging time period. This scheme can charge the electric vehicle in a suitable ambient temperature, reduce the energy consumption required for the operation of the cooling system, and improve the charging efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 A flowchart of a charging method of an electric vehicle is shown;

[0029] Figure 2 A flowchart of a charging method of an electric vehicle is shown;

[0030] Figure 3A structural schematic diagram of a charging device of an electric vehicle is shown.

[0031] Figure 4 A structural schematic diagram of a management system of an electric vehicle is shown according to an exemplary embodiment. DETAILED DESCRIPTION

[0032] For the purpose, technical solutions and advantages of the present application to be clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0033] Firstly, the terms involved in the embodiments of the present application are introduced:

[0034] BMS (Battery Management System, battery management system): used for intelligent management and maintenance of each battery unit, preventing overcharging and overdischarging of the battery, prolonging the service life of the battery, and monitoring the state of the battery.

[0035] It should be noted that before collecting the relevant data of the user and during the process of collecting the relevant data of the user, a prompt interface, a pop-up window or output voice prompt information can be displayed, which is used to prompt the user that the relevant data of the user is being collected at present, so that the present application only starts to perform the related steps of obtaining the relevant data of the user after obtaining the confirmation operation of the user to the prompt interface or the pop-up window, otherwise (i.e. without obtaining the confirmation operation of the user to the prompt interface or the pop-up window), ending the related steps of obtaining the relevant data of the user, i.e. not obtaining the relevant data of the user. In other words, all the user data collected by the present application is collected under the condition that the user agrees and authorizes, and the collection, use and processing of the relevant user data need to comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0036] In a high-temperature environment, most users immediately plug in the gun to start charging the electric vehicle after use for the sake of convenience. In a high-temperature environment, the temperature of the battery and the charger after driving is high, if the charging is immediately started with a large current at this time, the temperature of the battery and the charger will quickly rise, the high temperature will cause the charging efficiency of the charger and the battery to gradually decrease, at the same time, the cooling system will be forced to work to reduce the temperature, which will increase the energy consumption in the charging process, directly affecting the increase of the user's vehicle cost, and there is a great safety risk in the continuous charging of the electric vehicle in a high-temperature environment.

[0037] Therefore, in order to reduce energy consumption and ensure the safety of the charging process, the present application can pre-set a charging start time and a charging end time, and the electric vehicle will find a charging time period with suitable environment temperature between the charging start time and the charging end time to charge, which can not only improve the charging efficiency, but also ensure the charging safety.

[0038] Figure 1 A flowchart of a charging method of an electric vehicle is shown.

[0039] The method comprises:

[0040] Step 102: obtaining a charging start time and a charging end time of the electric vehicle.

[0041] The charging start time is used to represent the time when the electric vehicle starts charging. The charging end time is used to represent the time when the electric vehicle ends charging.

[0042] Optionally, in the case that the battery temperature is greater than a first temperature threshold and the charger temperature is greater than a second temperature threshold, a smart charging option is displayed; in response to a determination operation on the smart charging option, a time option is displayed; and in response to a time input operation on the time option, the charging start time and the charging end time are obtained. The first temperature threshold and the second temperature threshold can be the same or different. The first temperature threshold and the second temperature threshold can be pre-set by a technician. The time option is used to input the charging start time and the charging end time.

[0043] In some embodiments, in the case that the battery temperature is greater than a first temperature threshold and the charger temperature is greater than a second temperature threshold, a smart charging function request is sent to a mobile terminal; and the charging start time and the charging end time returned by the mobile terminal are obtained.

[0044] For example, in the case that the battery temperature is greater than a first temperature threshold and the charger temperature is greater than a second temperature threshold, a smart charging option is displayed, the smart charging option includes “Would you like to start the smart charging function?” and a determination button and a cancel button, in response to a determination operation on the determination button, a time option is displayed, and the user inputs the charging start time and the charging end time in the time option.

[0045] Step 104: determining a charging time period of the electric vehicle according to the charging start time, the charging end time and air temperature information, the air temperature information including the ambient air temperature between the charging start time and the charging end time.

[0046] Optionally, a charging expected duration is predicted according to the allowed charging power and the charging efficiency of the charger; and a charging time period is determined between the charging start time and the charging end time according to the air temperature information and the charging expected duration, the total duration of the charging time period is not less than the charging expected duration.

[0047] In some embodiments, due to errors, the charging expected duration is difficult to be accurate to a specific numerical value, so the charging expected duration is an interval. For example, the charging expected duration is [4, 5], and the unit of the charging expected duration is hour.

[0048] Step 106: determining the charging request power according to the battery temperature in the charging time period.

[0049] Optionally, the charging request power is determined from a relationship table according to the battery temperature, the relationship table being used to record the correspondence between the battery temperature and the charging request power; and the charging request power is corrected according to the battery temperature rise data and the charger temperature rise data.

[0050] The battery temperature rise data is used to represent the rising value of the battery temperature. The charger temperature rise data is used to represent the rising value of the charger temperature.

[0051] In some embodiments, the charging request power is reduced when the battery temperature rise data is greater than a first temperature rise threshold or the charger temperature rise data is greater than a second temperature rise threshold; or the charging request power is increased when the battery temperature rise data is less than the first temperature rise threshold and the charger temperature rise data is less than the second temperature rise threshold. The first temperature rise threshold and the second temperature rise threshold can be the same or different. The first temperature rise threshold and the second temperature rise threshold can be pre-set by a technician.

[0052] Step 108: providing the charging request power to the charger.

[0053] Optionally, after the electric vehicle completes charging, the actual charging duration is counted; and the saved power is calculated according to the difference between the actual charging duration and the expected charging duration and the charging request power.

[0054] In summary, the embodiments of the present application determine the charging time period of the electric vehicle according to the ambient temperature between the charging start time and the charging end time of the electric vehicle, and charge the electric vehicle in the charging time period. This scheme can charge the electric vehicle at a suitable ambient temperature, reduce the energy consumption required for the operation of the cooling system, and improve the charging efficiency.

[0055] In the following embodiments, the electric vehicle can predict the change of the ambient temperature, reasonably plan the charging time period according to the user charging setting demand, combine the vehicle charger and battery temperature, and calculate and analyze to allocate the charging power according to the charger and battery temperature. In the case of guaranteeing the user charging demand, the battery and charger temperature are effectively controlled, the charging efficiency is improved, the user experience of the intelligentization and humanization of the vehicle is improved on the premise of ensuring safety, which is particularly important and urgent, and has important significance for promoting the intelligent development of electric vehicles.

[0056] Figure 2 A flowchart of a charging method of an electric vehicle provided by an embodiment of the present application is shown.

[0057] The method comprises:

[0058] Step 201: determining whether to start the intelligent charging function according to the battery temperature and the charger temperature.

[0059] Optionally, in the case that the battery temperature is greater than the first temperature threshold and the charger temperature is greater than the second temperature threshold, it is determined to start the intelligent charging function, and step 202 is executed; in the case that the battery temperature is less than the first temperature threshold and the charger temperature is less than the second temperature threshold, it is determined not to start the intelligent charging function.

[0060] For example, the electric vehicle executes step 201 after detecting the charger, wherein the battery temperature is obtained by a battery temperature sensor, and the charger temperature is obtained by a charger temperature sensor.

[0061] Step 202: displaying the intelligent charging option.

[0062] For example, in the case that the battery temperature is greater than the first temperature threshold and the charger temperature is greater than the second temperature threshold, the intelligent charging option is displayed, the intelligent charging option includes "Do you want to start the intelligent charging function?" and a confirm button and a cancel button, in response to a confirm operation on the confirm button, a time option is displayed, and the user inputs the charging start time and the charging end time in the time option.

[0063] Step 203: obtaining the charging start time and the charging end time.

[0064] Optionally, in response to a confirm operation on the intelligent charging option, the time option is displayed; and in response to a time input operation on the time option, the charging start time and the charging end time are obtained.

[0065] Optionally, the vehicle-mounted control screen has a setting option of the intelligent charging function switch, the charging start time and the charging end time, when the battery temperature and the charger temperature detected by the BMS of the electric vehicle are higher than certain values after the user inserts the charging gun, the intelligent charging function start request information is sent to the vehicle-mounted control screen to actively pop up a dialog box to remind the user whether to start the intelligent charging function, when the user selects to start the intelligent charging function and sets the charging start time and the charging end time, the vehicle-mounted control screen sends the user related setting information to the BMS of the electric vehicle.

[0066] Step 204: predicting the charging expected duration.

[0067] Optionally, after the BMS receives the user related setting information (referring to the charging start time and the charging end time), the charging expected duration is calculated according to the user setting information, the allowed charging power under the current battery temperature and the charging efficiency of the charger.

[0068] In some embodiments, the electric vehicle predicts the charging expected duration according to the average temperature between the charging start time and the charging end time.

[0069] It should be noted that, since the ambient temperature and the battery temperature are constantly changing during the charging process, in order to reduce the influence of the above error, the charging expected duration predicted by the embodiment is set as an interval.

[0070] Step 205: determining the charging time period of the electric vehicle.

[0071] For example, the charging temperature interval is determined according to the air temperature information, and the charging temperature interval is used to represent the ambient temperature suitable for charging the electric vehicle; and the charging time period is determined between the charging start time and the charging end time, with the total duration of the charging time period being not less than the charging expected duration.

[0072] For example, the BMS plans a suitable charging time period according to the ambient temperature change trend information provided by the weather forecast software built in the electric vehicle within the user set time period.

[0073] Step 206: calculating the charging request power.

[0074] For example, the charger performs charging according to the charging request power sent by the BMS, and the BMS records the charging power, the temperature rise of the battery and the charger, and other data in real time during the charging process, and automatically corrects and adjusts the unreasonable parameters in the relationship table after completing multiple rounds of charging.

[0075] Step 207: indicating the charging request power to the charger.

[0076] Step 208: calculating the saved electricity quantity.

[0077] Optionally, the actual charging duration is counted; and the saved electricity quantity is calculated according to the difference between the actual charging duration and the charging expected duration and the charging request power.

[0078] For example, the actual charging duration is T1, the charging expected duration is [T2, T3], and the average value of the charging request power in the charging time period is P, and then the saved electricity quantity is P*(((T2+T3) / 2)-T1).

[0079] Optionally, the saved electricity quantity is calculated according to the reduced working time of the cooling system. For example, the actual working time of the cooling system is T4, the predicted working time of the cooling system is T5, and the power of the cooling system is P2, and then the saved electricity quantity is P2*(T5-T4).

[0080] Step 209: calculating the carbon emission reduction quantity according to the saved electricity quantity.

[0081] Optionally, the carbon emission reduction quantity is sent to the mobile terminal, or the carbon emission quantity is displayed on the vehicle-mounted control screen of the electric vehicle.

[0082] In summary, the embodiment of the application determines the charging time period of the electric vehicle according to the ambient temperature between the charging start time and the charging end time of the electric vehicle, and charges the electric vehicle in the charging time period. This scheme can charge the electric vehicle at a suitable ambient temperature, reduce the energy consumption required for the operation of the cooling system, and improve the charging efficiency.

[0083] Under the premise of guaranteeing the user-set charging power and time target, the temperature rise of the battery and the charger is balanced as much as possible, the energy consumption required for the operation of the cooling system is reduced, and the charging safety is improved; the saved power due to the improved charging efficiency and the reduced operation time of the cooling system is calculated after the charging is completed, and is converted into a carbon emission reduction value and displayed to the user. The application effectively controls the temperature of the battery and the charger, improves the charging efficiency, and brings the improvement of the driving economy to the customer under the premise of guaranteeing the charging demand of the user and ensuring the safety, and enables the user to experience the intelligence and humanization of the vehicle; it is particularly important and urgent, and has important significance for promoting the intelligent development of electric vehicles.

[0084] The following is a device embodiment of the application. For details not described in detail in the device embodiment, reference can be made to the corresponding description in the above method embodiment, which will not be described herein.

[0085] Figure 3 A structural schematic diagram of a charging device of an electric vehicle provided by an exemplary embodiment of the application is shown. The device can be realized by software, hardware, or a combination of both to become all or part of a computer device. The device 300 includes:

[0086] The acquisition module 301 is configured to acquire the charging start time and the charging end time of the electric vehicle.

[0087] The calculation module 302 is configured to determine the charging time period of the electric vehicle according to the charging start time, the charging end time, and the temperature information, wherein the temperature information includes the ambient temperature between the charging start time and the charging end time.

[0088] The calculation module 302 is further configured to determine the charging request power according to the battery temperature in the charging time period.

[0089] The indication module 303 is configured to indicate the charging request power to the charger.

[0090] In an optional design, the calculation module 302 is further configured to predict a charging expected duration according to the allowed charging power and the charging machine charging efficiency; and determine the charging time period between the charging start time and the charging end time according to the air temperature information and the charging expected duration, wherein a total duration of the charging time period is not less than the charging expected duration.

[0091] In an optional design, the calculation module 302 is further configured to determine a charging temperature interval according to the air temperature information, wherein the charging temperature interval is used to represent an ambient temperature suitable for charging the electric vehicle; and determine the charging time period between the charging start time and the charging end time according to the charging temperature interval, wherein a total duration of the charging time period is not less than the charging expected duration.

[0092] In an optional design, the calculation module 302 is further configured to determine the charging request power from a relationship table according to the battery temperature, wherein the relationship table is used to record a corresponding relationship between the battery temperature and the charging request power; and correct the charging request power according to battery temperature rise data and charging machine temperature rise data.

[0093] In an optional design, the calculation module 302 is further configured to reduce the charging request power in a case that the battery temperature rise data is greater than a first temperature rise threshold or the charging temperature rise data is greater than a second temperature rise threshold; or increase the charging request power in a case that the battery temperature rise data is less than the first temperature rise threshold and the charging temperature rise data is less than the second temperature rise threshold.

[0094] In an optional design, the acquisition module 301 is further configured to display an intelligent charging option in a case that the battery temperature is greater than a first temperature threshold and the charging machine temperature is greater than a second temperature threshold; display a time option in response to a determination operation on the intelligent charging option; and acquire the charging start time and the charging end time in response to a time input operation on the time option.

[0095] In an optional design, the calculation module 302 is further configured to count a charging actual duration; and calculate a saved power according to a difference between the charging actual duration and a charging expected duration and the charging request power.

[0096] In summary, the embodiments of the present application determine a charging time period of the electric vehicle between a charging start time and a charging end time according to an ambient air temperature, and charge the electric vehicle in the charging time period. This scheme can charge the electric vehicle in a suitable ambient temperature, reduce the energy consumption required for the operation of the cooling system, and improve the charging efficiency.

[0097] Figure 4Fig. 1 is a schematic diagram of an electric vehicle management system according to an example embodiment. Server 400 includes a central processing unit (CPU) 401, a system memory 404, including a random access memory (RAM) 402 and a read-only memory (ROM) 403, and a system bus 405 that couples the system memory 404 to the central processing unit 401. Computer device 400 also includes a basic input / output system (Input / Output, I / O) system 406 that helps transfer information between elements within the computer device, and a mass storage device 407 for storing an operating system 413, application programs 414, and other program modules 415.

[0098] The basic input / output system 406 includes a display 408 for displaying information and input devices 409, such as a mouse, keyboard, or the like, for inputting information. The display 408 and input devices 409 are connected to the central processing unit 401 through an input / output controller 410 that is connected to the system bus 405. The basic input / output system 406 can also include the input / output controller 410 for receiving and processing input from a number of other devices, including a keyboard, mouse, or electronic stylus. Similarly, the input / output controller 410 provides output to a display screen, printer, or other type of output device.

[0099] The mass storage device 407 is connected to the central processing unit 401 through a mass storage controller (not shown) that is connected to the system bus 405. The mass storage device 407 and its associated computer device readable medium provide non-volatile storage for the computer device 400. That is, the mass storage device 407 can include a computer device readable medium (not shown) such as a hard disk or a compact disk read-only memory (CD-ROM) drive.

[0100] Without loss of generality, the computer device readable medium can include computer device storage media and communication media. Computer device storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer device readable instructions, data structures, program modules or other data. Computer device storage media includes RAM, ROM, Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), CD-ROM, Digital Video Disc (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, computer device storage media does not limit to the above-mentioned several kinds. The system memory 404 and the mass storage device 407 mentioned above can be collectively referred to as memory.

[0101] According to various embodiments of the present disclosure, the computer device 400 can also run on a remote computer device connected to a network, such as the Internet. That is, the computer device 400 can be connected to the network 411 through the network interface unit 412 connected to the system bus 405, or in other words, the network interface unit 412 can also be used to connect to other types of network or remote computer device system (not shown).

[0102] The memory further includes one or more programs stored in the memory, and the central processing unit 401 implements all or part of the steps of the charging method of the electric vehicle by executing the one or more programs.

[0103] In the exemplary embodiments, an electric vehicle is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the charging method of the electric vehicle provided by each method embodiment.

[0104] The present application also provides a computer readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the charging method of the electric vehicle provided by the above method embodiments.

[0105] The application further provides a computer program product or computer program, which comprises computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and executes the computer instructions, so that the computer device executes the charging method of the electric vehicle provided in the above aspects.

[0106] The sequence numbers of the embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0107] Those skilled in the art can understand that all or part of the steps of the above embodiments can be completed by hardware, or can be instructed by a program to complete the related hardware, and the program can be stored in a computer readable storage medium, and the storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk.

[0108] The above is only an optional embodiment of the application, and is not used to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A charging method for an electric vehicle, characterized in that, The method includes: When the battery temperature exceeds the first temperature threshold and the charger temperature exceeds the second temperature threshold, the smart charging option will be displayed. In response to a confirmation action on the smart charging option, the time option is displayed; In response to a time input operation on the time option, the charging start time and charging end time are obtained; Based on the allowed charging power and the charger's charging efficiency, predict the estimated charging time; The charging temperature range is determined based on the temperature information, which represents the ambient temperature suitable for charging the electric vehicle; the temperature information includes the ambient temperature between the charging start time and the charging end time. Based on the charging temperature range, the allowable charging power at the current battery temperature, and the charger's charging efficiency, a charging time period is determined between the charging start time and the charging end time, with the goal that the total duration of the charging time period is not less than the estimated charging time. The total duration of the charging time period is not less than the estimated charging time. The charging time period is planned based on the ambient temperature change trend information from the charging start time to the charging end time period provided by the weather forecast software built into the electric vehicle. During the charging period, the charging request power is determined based on the battery temperature; Indicate the requested charging power to the charger.

2. The method according to claim 1, characterized in that, The step of determining the charging request power based on battery temperature includes: The charging request power is determined from a relationship table based on the battery temperature, and the relationship table is used to record the correspondence between the battery temperature and the charging request power; The charging request power is adjusted based on the battery temperature rise data and the charger temperature rise data.

3. The method according to claim 2, characterized in that, The step of correcting the charging request power based on battery temperature rise data and charger temperature rise data includes: If the battery temperature rise data is greater than a first temperature rise threshold or the charger temperature rise data is greater than a second temperature rise threshold, reduce the charging request power. Alternatively, if the battery temperature rise data is less than the first temperature rise threshold and the charger temperature rise data is less than the second temperature rise threshold, the charging request power is increased.

4. The method according to claim 1, characterized in that, The method further includes: Statistical analysis of actual charging time; The power saving is calculated based on the difference between the actual charging time and the estimated charging time, and the power requested for charging.

5. A charging device for an electric vehicle, characterized in that, The device includes: The acquisition module is used to display a smart charging option when the battery temperature is greater than a first temperature threshold and the charger temperature is greater than a second temperature threshold; to display a time option in response to a confirmation operation on the smart charging option; and to acquire the charging start time and charging end time in response to a time input operation on the time option. The calculation module is used to predict the estimated charging time based on the allowable charging power and the charger charging efficiency; determine the charging temperature range based on air temperature information, which represents the ambient temperature suitable for charging the electric vehicle; the air temperature information includes the ambient air temperature between the charging start time and the charging end time; and determine a charging time period between the charging start time and the charging end time based on the charging temperature range, the allowable charging power at the current battery temperature, and the charger charging efficiency, with the goal that the total charging time period is not less than the estimated charging time. The total charging time period is not less than the estimated charging time. The charging time period is planned based on the ambient temperature change trend information from the charging start time to the charging end time period provided by the weather forecast software built into the electric vehicle. The calculation module is also used to determine the charging request power based on the battery temperature during the charging period. An indicator module is used to indicate the requested charging power to the charger.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to implement the charging method for an electric vehicle as described in any one of claims 1 to 4.

7. An electric vehicle, characterized in that, The electric vehicle includes a processor and a memory, the memory storing at least one program, the at least one program being loaded and executed by the processor to implement the charging method of the electric vehicle as described in any one of claims 1 to 4.

Images