Electric vehicle charging method, computer device, and storage medium

Abstract

The present invention discloses an electric vehicle charging method, a computer device, and a storage medium, including steps of determining the required battery constant temperature energy consumption, the battery heat generation during charging, and the battery charging absorption energy at the target time according to battery information, the environmental temperature at the time of parking, the target time, the remaining charging duration, and the target state of charge, determining the value of the target time that satisfies the first constraint condition and the second constraint condition, and setting the starting time for charging the power battery of the electric vehicle according to the target time. By setting the starting time for charging according to the target time, the present invention can complete charging before the planned vehicle usage time according to the target state of charge, minimize the total power consumption on the basis of ensuring the normal vehicle usage of the user, reduce the power consumption caused by factors such as battery constant temperature energy consumption and battery heat generation during charging, enable a larger proportion of the electric energy to be converted into chemical energy, and achieve energy-saving charging. The present invention is widely applied to the field of automotive technology.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to an electric vehicle charging method, a computer device, and a storage medium. Background Art

[0002] An electric vehicle is powered by discharging a power battery. The performance of the power battery is affected by the ambient temperature and the operating temperature generated by heat release during charge and discharge. Therefore, a battery temperature control system can be used to cool the power battery when its temperature is too high and heat the power battery when its temperature is too low, so that the temperature of the power battery is maintained within a suitable range to achieve better charge and discharge performance.

[0003] During the charging process of an electric vehicle, in addition to the electric energy absorbed by the power battery, that is, the electric energy converted into the internal chemical energy of the battery, there is also the electric energy consumption converted into heat energy due to the internal resistance of the power battery, as well as the electric energy consumed by the battery temperature control system for cooling and heating. The current electric vehicle charging strategy only considers the electric energy consumption generated by heat release due to the internal resistance of the battery in terms of energy conservation. For example, research is carried out on how to reduce the internal resistance of the battery to reduce the electric energy consumed due to heat release, but the electric energy consumed by the battery temperature control system for cooling and heating is not considered. Therefore, there is still room for improvement in the energy conservation of the existing electric vehicle charging technology. Summary of the Invention

[0004] Aiming at the technical problem that the current electric vehicle charging technology still needs to improve energy conservation, the purpose of the present invention is to provide an electric vehicle charging method, a computer device, and a storage medium.

[0005] On the one hand, an embodiment of the present invention includes an electric vehicle charging method, comprising:

[0006] Setting a target state of charge and a planned vehicle use time;

[0007] Detecting battery information of the electric vehicle;

[0008] Detecting the ambient temperature when parking;

[0009] Determining the required battery temperature control energy consumption until the target time according to the battery information and the ambient temperature when parking;

[0010] Determining the battery heat generation amount during the charging process according to the battery information, the target time, and the remaining charging duration;

[0011] Determining the energy absorbed by the battery during charging according to the target state of charge and the battery information;

[0012] Establishing a first constraint condition according to the target time, the remaining charging duration, and the planned vehicle use time;

[0013] Establish a second constraint condition based on the energy absorbed by the battery during charging, the constant-temperature energy consumption of the battery, and the heat generated by the battery during the charging process;

[0014] Determine the value of the target time that satisfies the first constraint condition and the second constraint condition;

[0015] Set the starting time for charging the power battery of the electric vehicle according to the target time.

[0016] Further, the detection of the battery information of the electric vehicle includes:

[0017] Detect the power battery of the electric vehicle through the battery management system;

[0018] Use the detected battery temperature at parking, battery charging curve, battery internal resistance, state of charge at parking, total battery capacity, and remaining charging duration as the battery information.

[0019] Further, the determination of the constant-temperature energy consumption required by the battery until the target time according to the battery information and the ambient temperature at parking includes:

[0020] Determine the first temperature difference; the first temperature difference is the difference between the battery temperature at parking and the ambient temperature at parking;

[0021] Determine the predicted battery temperature according to the first temperature difference and the cooling model; the predicted battery temperature is the temperature of the power battery predicted at the target time;

[0022] Determine the second temperature difference; the second temperature difference is the difference between the predicted battery temperature and the ambient temperature at parking;

[0023] Determine the constant-temperature energy consumption of the battery according to the second temperature difference and the constant-temperature heat dissipation model.

[0024] Further, the determination of the heat generated by the battery during the charging process according to the battery information, the target time, and the remaining charging duration includes:

[0025] According to the formula Perform the calculation; where Q charge is the heat generated by the battery during the charging process, t is the target time, I bat is the charging current determined according to the battery charging curve, and r bat is the internal resistance of the battery.

[0026] Further, the determination of the energy absorbed by the battery during charging according to the target state of charge and the battery information includes:

[0027] According to the formula E charge =(SOCtarget - State of Charge (SOC) park )E bat Perform calculations; where E charge Absorbs energy for charging the battery, and SOC target Is the target state of charge, and SOC park Is the state of charge when parked, and E bat Is the total capacity of the battery.

[0028] Furthermore, establishing a first constraint condition according to the target time, the remaining charging duration, and the planned vehicle usage time, includes:

[0029] According to the formula t + t remain ≤ t drive , determine the first constraint condition; where t is the target time, t remain Is the remaining charging duration, and t drive Is the planned vehicle usage time.

[0030] Furthermore, establishing a second constraint condition according to the energy absorbed by the battery during charging, the constant-temperature energy consumption of the battery, and the heat generated by the battery during the charging process, includes:

[0031] According to the formula min{E sum = E charge + E heat + Q charge}, determine the second constraint condition; where E charge Is the energy absorbed by the battery during charging, E heat Is the constant-temperature energy consumption of the battery, and Q charge Is the heat generated by the battery during the charging process.

[0032] Furthermore, setting the starting time for charging the power battery of an electric vehicle according to the target time, includes:

[0033] Detect the target signal;

[0034] Determine the target distance according to the target signal;

[0035] When the target distance is detected to be less than the distance threshold before the target time, use the time when the target distance is detected to be less than the distance threshold as the starting time for charging;

[0036] When the target distance is not detected to be less than the distance threshold, use the target time as the starting time for charging.

[0037] On the other hand, an embodiment of the present invention further includes a computer device, including a memory and a processor, where the memory is used to store at least one program, and the processor is used to load the at least one program to execute the electric vehicle charging method in the embodiment.

[0038] On the other hand, an embodiment of the present invention further includes a storage medium, in which a program executable by a processor is stored, and the program executable by the processor is used to execute the electric vehicle charging method in the embodiment when executed by the processor.

[0039] The beneficial effects of the present invention are as follows: In the electric vehicle charging method in the embodiment, by setting the start time of charging according to the target time, since the target time simultaneously satisfies the first constraint condition and the second constraint condition, it is possible to complete charging before the planned vehicle use time according to the target state of charge. On the basis of ensuring the normal use of the vehicle by the user, the total power consumption is minimized, thereby reducing the power consumption caused by factors such as the constant temperature energy consumption of the battery and the heat generation of the battery during the charging process, enabling a larger proportion of the electric energy to be converted into chemical energy, that is, converted into the energy absorbed by the battery charging, so as to achieve energy-saving charging of the electric vehicle. Description of the Drawings

[0040] Figure 1 It is a schematic diagram of a system to which the electric vehicle charging method can be applied in the embodiment;

[0041] Figure 2 It is a flowchart of the electric vehicle charging method in the embodiment. Detailed Embodiments

[0042] In this embodiment, the electric vehicle charging method can be applied in Figure 1 the system shown. Figure 1 In, the middle box is the control topology on the vehicle side, where 1 is the Vehicle Control Unit (VCU), 2 is the 12V low-voltage power supply, 3 is the Battery Management System (BMS), 4 is the Telematics Control Unit (TCU), 5 is the Heater / Cooler, and Pack is the power battery. Among them, the 12V low-voltage power supply supplies power to components such as the battery management system BMS, the vehicle control unit VCU, and the telematics control unit TCU, and the power battery supplies power to components such as the power system and the transmission system of the electric vehicle. Components such as the battery management system BMS, the vehicle control unit VCU, and the telematics control unit TCU are connected through the CAN bus.

[0043] Figure 1Among them, the 6 on the left is the charger. When charging an electric vehicle, the battery management system (BMS) installed in the electric vehicle is connected to the charger, and the current of the charger is input into the BMS, and the BMS outputs a charging current to the power battery. Since the power battery will generate heat during charging and discharging, it may cause the temperature of the power battery to be higher than the optimal operating temperature. When the power battery is in a non-charging and discharging state, the temperature of the power battery is the same as the ambient temperature. In the case of too high or too low ambient temperature, the temperature of the power battery may deviate from the optimal operating temperature. Therefore, a heating / cooling controller (Heater / Cooler) is set in the vehicle-side control topology. When the temperature of the power battery is too high, it cools the power battery, and when the temperature of the power battery is too low, it heats the power battery, so that the temperature of the power battery is maintained within a suitable range.

[0044] Figure 1 Among them, the right part is the remote control system, which includes a server 8 and a user terminal 7. The user can send control instructions to the telematics control unit (TCU) in the vehicle-side control topology by operating the user terminal or the server.

[0045] In this embodiment, referring to Figure 2 , the electric vehicle charging method includes the following steps:

[0046] S1. Set the target state of charge (SOC) target and the planned vehicle usage time t drive ;

[0047] S2. Detect the battery information of the electric vehicle;

[0048] S3. Detect the ambient temperature T when parking ambient ;

[0049] S4. According to the battery information and the ambient temperature T when parking ambient , determine the required battery constant temperature energy consumption E at the target time t heat ;

[0050] S5. According to the battery information, the target time t and the remaining charging duration t remain , determine the battery heat generation Q during the charging process charge ;

[0051] S6. According to the target state of charge (SOC) target and the battery information, determine the battery charging absorption energy E charge ;

[0052] S7. According to the target time t, the remaining charging duration t remain and the planned vehicle usage time t drive , establish the first constraint condition;

[0053] S8. Establish a second constraint condition according to the energy E absorbed by the battery during charging, charge the constant-temperature energy consumption E of the battery, heat and the heat generation Q of the battery during the charging process; charge

[0054] S9. Determine the value of the target time t that satisfies the first constraint condition and the second constraint condition;

[0055] S10. Set the starting time for charging the power battery of the electric vehicle according to the target time t.

[0056] In step S1, the user can operate the user terminal in Figure 1 to edit the target state of charge SOC target and the planned vehicle usage time t, drive send the target state of charge SOC target and the planned vehicle usage time t drive to the telematics control unit TCU. The telematics control unit TCU sends the target state of charge SOC target and the planned vehicle usage time t drive to the vehicle control unit VCU.

[0057] In step S1, the target state of charge SOC target represents the state of charge that the power battery in the electric vehicle is expected to reach after charging, that is, the percentage equivalent to the total power of the power battery. The planned vehicle usage time t drive represents the time point when the user hopes to use the electric vehicle.

[0058] In step S2, the vehicle control unit VCU controls the battery management system BMS to detect the power battery of the electric vehicle and obtains the battery temperature T when parked, park the battery charging curve I, bat the battery internal resistance r, bat the state of charge SOC when parked, park the total battery capacity E, bat and the remaining charging duration t, remain etc. as battery information.

[0059] Among the battery information, the battery temperature T when parked park is the temperature measured by the battery management system BMS for the power battery when the electric vehicle is parked near the charging pile and ready to be charged; the battery charging curve I bat can represent the corresponding relationship between the charging current input to the power battery and time under the control of the battery management system BMS when the battery management system BMS is connected to the charging pile; the battery internal resistance r bat ​Represents the internal resistance of the power battery, which can generally be set to a fixed value; the state of charge SOC when parked park Represents the state of charge measured by the battery management system BMS for the power battery when the electric vehicle is parked near the charging pile and ready to charge, that is, the percentage of the power of the power battery when parked reaches the total power of the power battery; the total battery capacity E bat Represents the amount of electricity stored when the battery is fully charged, that is, the state of charge is 100%, and it can generally be set to a fixed value; the remaining charging duration t remain Can be calculated by the battery management system BMS according to the target state of charge SOC target 、The state of charge SOC when parked park And the battery charging curve I bat And other information, and can be calculated through the charging management algorithm, which can represent the duration from when the battery management system BMS outputs the charging current to the power battery until the charging is completed.

[0060] In step S3, the vehicle control unit VCU can call the temperature sensor installed on the electric vehicle to detect the ambient temperature T when parked ambient . The ambient temperature T when parked ambient Represents the temperature of the environment where the electric vehicle is located when the electric vehicle is parked near the charging pile and ready to charge.

[0061] In step S4, the battery management system BMS sends the battery information obtained in step S2 to the vehicle control unit VCU. The vehicle control unit VCU determines the required battery constant temperature energy consumption E at the target time t according to the battery temperature T when parked in the battery information park And the ambient temperature T when parked obtained by executing step S3 ambient , Determine the required battery constant temperature energy consumption E at the target time t heat .

[0062] When the vehicle control unit VCU executes step S4, it can specifically execute the following steps:

[0063] S401. Determine the first temperature difference |T ambient -T park |;

[0064] S402. According to the first temperature difference |T ambient -T park | and the cooling model, determine the predicted battery temperature T t-bat ;

[0065] S403. Determine the second temperature difference |T ambient -T t-bat |;

[0066] S404. According to the second temperature difference |T ambient -T t-bat| and the constant temperature heat dissipation model to determine the constant temperature energy consumption E of the battery heat .

[0067] In step S401, the vehicle control unit VCU calculates the first temperature difference |T ambient and the battery temperature T during parking park - T ambient - T park |. The first temperature difference |T ambient - T park | represents the temperature difference between the power battery and the environment when the vehicle has just stopped.

[0068] In step S402, since during the execution of steps S401 - S404, before the target time t, the power battery has not been charged and the electric vehicle is already in the parked state, that is, the power battery is not discharging, so there is no heat generation in the power battery due to charging and discharging. In this case, the power battery is in a state of natural cooling (without starting devices such as cooling fans) or forced cooling (starting devices such as cooling fans) relative to the environment, and cooling models such as Newton's cooling law can be applied (since the heat flow direction between the power battery and the environment is related to the temperature difference, whether the temperature of the power battery is higher than the environment temperature or the environment temperature is higher than the power battery temperature, the cooling model can be applied). According to the first temperature difference |T ambient - T park |, the temperature at any time after parking and before starting charging is calculated. In this embodiment, a specific target time t is set, and the initial temperature difference is the first temperature difference |T ambient - T park |. The temperature of the power battery when it is naturally cooled or forced cooled to the target time t is obtained, and the predicted battery temperature T t-bat .

[0069] In step S403, it is assumed that the power battery starts to be charged at the target time t. At this time, heat will be generated in the power battery due to internal resistance. To keep the temperature of the power battery within the optimal range, the heating / cooling controller Heater / Cooler is started to keep the temperature of the power battery constant (heating the power battery when it is below the optimal range and cooling the power battery when it is above the optimal range). Under the action of the heating / cooling controller Heater / Cooler, the power battery is at a constant temperature (for example, the predicted battery temperature T t-bat ), and at this time, the temperature difference between the power battery and the environment is the second temperature difference |T ambient - T t-bat |.

[0070] In step S404, the Newton's law of cooling can be set under a constant temperature condition to obtain a constant temperature heat dissipation model, and the heating or cooling power output to the power battery for achieving the constant temperature of the power battery can be calculated, that is, the working power of the heater / cooler controller Heater / Cooler.

[0071] In step S404, after calculating the working power of the heater / cooler controller Heater / Cooler, the appropriate loss can be added to the basis of the working power of the heater / cooler controller Heater / Cooler according to the working efficiency of the heater / cooler controller Heater / Cooler, so as to obtain the battery constant temperature energy consumption E heat . The battery constant temperature energy consumption E heat represents the energy consumption required (mainly consumed by the heater / cooler controller Heater / Cooler) to maintain the temperature of the power battery within a suitable range when charging the power battery.

[0072] In step S5, the vehicle controller VCU determines the battery heat generation Q during the charging process according to the battery charging curve and the battery internal resistance r bat in the battery information, as well as the target time t and the remaining charging duration t remain . Specifically, the vehicle controller VCU performs the calculation through the formula charge . Among them, the vehicle controller VCU can query the corresponding charging current I from the battery charging curve at each time point within the integration limits [t, t + t and perform the integration calculation, so as to obtain the battery heat generation Q corresponding to the target time t remain . The battery heat generation Q during the charging process bat represents the electric energy consumed by the heat generated by the battery internal resistance and the charging current during the charging process of the power battery. charge . The battery heat generation Q during the charging process charge represents the electric energy consumed by the heat generated by the battery internal resistance and the charging current during the charging process of the power battery.

[0073] In step S6, the vehicle controller VCU calculates the battery charging absorbed energy E according to the target state of charge SOC target and the state of charge SOC when parking in the battery information park as well as the total battery capacity E bat . Specifically, the vehicle controller VCU performs the calculation according to the formula E charge =(SOC charge -SOC target )E park . The calculated battery charging absorbed energy E bat represents the electric energy consumed and converted into chemical energy by the power battery during the charging process of the power battery. charge represents the electric energy consumed and converted into chemical energy by the power battery during the charging process of the power battery.

[0074] In step S7, the vehicle control unit (VCU) establishes a first constraint condition \(t + t_{r}\leq t_{p}\) based on the target time \(t\), the remaining charging duration \(t_{r}\) remain and the planned vehicle usage time \(t_{p}\). drive The meaning of the first constraint condition is that starting from the target time \(t\), the time point after the remaining charging duration \(t_{r}\) remain is no later than the planned vehicle usage time \(t_{p}\). drive Under the condition of satisfying the first constraint condition, the vehicle control unit (VCU) can control the battery management system (BMS) to complete the charging of the power battery no later than the planned vehicle usage time \(t_{p}\), remain so that when the user picks up the vehicle at the planned vehicle usage time \(t_{p}\), drive the state of charge (SOC) of the power battery of the electric vehicle reaches the target state of charge. drive drive target .

[0075] In step S8, the vehicle control unit (VCU) establishes a second constraint condition \(\min\{E_{a}=E_{c}+E_{t}+Q\}\) based on the energy \(E_{a}\) absorbed by the battery during charging, charge the constant-temperature energy consumption \(E_{t}\) of the battery, heat and the heat generation \(Q\) of the battery during the charging process. charge In the second constraint condition, \(E_{a}\) sum is the sum of the energy \(E_{c}\) absorbed by the battery during charging, charge the constant-temperature energy consumption \(E_{t}\) of the battery, heat and the heat generation \(Q\) of the battery during the charging process, charge representing the total power consumption during the charging of the power battery. sum charge heat charge

[0076] Under the condition of satisfying the second constraint condition, the total power consumption \(E_{a}\) sum is minimized. And under the condition of satisfying the first constraint condition, it can be ensured that the power battery reaches the target state of charge SOC, target that is, when the total power consumption \(E_{a}\) sum is minimized, the energy \(E_{c}\) absorbed by the battery during charging will not be too small to cause incomplete charging. charge

[0077] Therefore, in step S9, by setting to simultaneously satisfy the first constraint condition and the second constraint condition, it is possible to minimize the total power consumption \(E_{a}\) on the basis of completing the charging, and calculate the value of the target time \(t\) that simultaneously satisfies the first constraint condition and the second constraint condition. Specifically, a series of trial values of the target time \(t\) can be set according to the first constraint condition, and the corresponding total power consumption \(E_{a}\) can be calculated respectively according to each trial value of the target time \(t\), and then select each total power consumption \(E_{a}\) sum sum ​sum The target time t corresponding to the minimum value in

[0078] In step S10, the vehicle control unit VCU sets the starting time for charging the power battery of the electric vehicle according to the target time t. Before the starting time, the vehicle control unit VCU controls the battery management system BMS not to charge the power battery temporarily; when the starting time is reached, the vehicle control unit VCU controls the battery management system BMS to start charging the power battery until the charging is completed. Since the starting time is set according to the target time t, and the target time t satisfies both the first constraint condition and the second constraint condition at the same time, by executing steps S1 - S10, it is possible to complete the charging before the planned vehicle use time t target while achieving the minimum value of the total power consumption E drive on the basis of ensuring the normal use of the vehicle by the user, and reducing the power consumption caused by factors such as the battery constant temperature energy consumption E sum and the battery heat generation Q during the charging process heat so that a larger proportion of the electric energy output by the battery management system BMS is converted into chemical energy, that is, converted into the battery charging absorption energy E charge to achieve energy-saving charging of the electric vehicle. charge

[0079] In this embodiment, when the vehicle control unit VCU executes step S10, that is, the step of setting the starting time for charging the power battery of the electric vehicle according to the target time t, the following steps can be specifically executed:

[0080] S1001. Detect the target signal;

[0081] S1002. Determine the target distance according to the target signal;

[0082] S1003. When it is detected that the target distance is less than the distance threshold, use the moment when it is detected that the target distance is less than the distance threshold as the starting time for charging;

[0083] S1004. When the target distance less than the distance threshold is not detected, use the target time t as the starting time for charging.

[0084] In this embodiment, steps S1001 - S1004 can be executed in the following scenarios: A wireless positioning module based on protocols such as Bluetooth is installed on an electric vehicle, and a radio signal transmitting module based on protocols such as Bluetooth is integrated in a device such as a car key carried by a user; the wireless positioning module uses radio signals such as Bluetooth signals transmitted by the radio signal transmitting module as target signals, and by detecting the target signals transmitted by the radio signal transmitting module, the wireless positioning module can determine the real - time position of the user.

[0085] In step S1001, the vehicle control unit VCU calls the wireless positioning module to detect the target signals emitted by the radio signal transmitting module carried by the user.

[0086] In step S1002, the vehicle control unit VCU analyzes the target signals and executes a positioning algorithm to determine the real - time position of the user. Among them, the real - time position of the user can be represented in a coordinate system with the position of this vehicle as the origin. The vehicle control unit VCU calculates the distance between the user and this vehicle, that is, the target distance, according to the real - time position of the user and the position of this vehicle.

[0087] In step S1002, the vehicle control unit VCU can set a distance threshold (for example, 100m) and determine whether the target distance is less than the distance threshold.

[0088] Since when the user is too far away from this vehicle, the wireless positioning module may not be able to detect the target signals emitted by the radio signal transmitting module. Therefore, the vehicle control unit VCU can set the distance threshold to the limit distance (for example, 300m) at which the wireless positioning module can detect the target signals. When executing step S1002, when the wireless positioning module cannot detect the target signals, the vehicle control unit VCU determines that the target distance is not less than the distance threshold, and when the wireless positioning module can detect the target signals, the vehicle control unit VCU determines that the target distance is less than the distance threshold.

[0089] In step S1003, when it is detected that the target distance is less than the distance threshold before the target time t, the vehicle control unit VCU uses the moment when the target distance is first detected to be less than the distance threshold as the starting moment for charging.

[0090] In step S1004, when it is not detected that the target distance is less than the distance threshold after reaching the target time t, the vehicle control unit VCU uses the target time t as the starting moment for charging.

[0091] Executing steps S1003 - S1004 is equivalent to using the earliest moment among the moment when the target distance is first detected to be less than the distance threshold and the target time t as the starting moment for charging. The vehicle control unit VCU controls the battery management system BMS to start charging the power battery when reaching the starting moment for charging.

[0092] The principle of executing steps S1001 - S1004 is as follows: When the target distance is not detected to be less than the distance threshold after reaching the target time t, it can be determined that after the user parks and leaves the electric vehicle, the user has not returned to the electric vehicle before the target time t. The vehicle control unit (VCU) controls the battery management system (BMS) to start charging the power battery at the target time t, so as to minimize the total power consumption and reduce the power consumption caused by factors such as the constant temperature energy consumption of the battery and the heat generation of the battery during the charging process, achieving the energy-saving charging effect. When the target distance is detected to be less than the distance threshold before the target time t, it can be determined that after the user parks and leaves the electric vehicle, the user has the intention to return to the electric vehicle before the target time t, and there may be a vehicle usage requirement. The vehicle control unit (VCU) controls the battery management system (BMS) to start charging the power battery at the moment when the target distance is first detected to be less than the distance threshold, so as to charge as much as possible before the user uses the vehicle, enabling the user to still meet the vehicle usage requirement when temporarily changing the plan determined by t drive to improve the convenience of the electric vehicle.

[0093] A computer program for executing the electric vehicle charging method in this embodiment can be written and stored in a storage medium or a computer device. When the computer program is read and run, it executes the electric vehicle charging method in this embodiment, thereby achieving the same technical effects as the electric vehicle charging method in the embodiment.

[0094] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in this disclosure are only relative to the mutual positional relationship of the components of this disclosure in the drawings. The singular forms "a", "the", and "said" used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. In addition, unless otherwise defined, all the technical and scientific terms used in this embodiment have the same meaning as commonly understood by those skilled in the technical field of this technology. The terms used in the description of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more of the related listed items.

[0095] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, without departing from the scope of this disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as", etc.) provided in this embodiment is only intended to better illustrate the embodiments of the present invention and will not impose a limitation on the scope of the present invention unless otherwise required.

[0096] It should be recognized that embodiments of the present invention can be implemented or carried out by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method can be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and drawings described in the specific embodiments. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system. However, if desired, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. In addition, for this purpose, the program is capable of running on a programmed application-specific integrated circuit.

[0097] In addition, the operations of the processes described in this embodiment can be performed in any suitable order, unless this embodiment otherwise indicates or is otherwise clearly contradictory to the context. The processes described in this embodiment (or variations and / or combinations thereof) can be executed under the control of one or more computer systems configured with executable instructions, and can be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) executed commonly on one or more processors, by hardware, or a combination thereof. The computer program includes a plurality of instructions executable by one or more processors.

[0098] Further, the method can be implemented in any type of computing platform operatively connected to a suitable one, including but not limited to personal computers, minicomputers, mainframes, workstations, network or distributed computing environments, separate or integrated computer platforms, or communicating with charged particle tools or other imaging devices, etc. Aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into the computing platform, such as a hard disk, optical read and / or write storage medium, RAM, ROM, etc., such that it can be read by a programmable computer and can be used to configure and operate the computer to perform the processes described herein when the storage medium or device is read by the computer. In addition, the machine-readable code, or portions thereof, can be transmitted via wired or wireless networks. When such media include instructions or programs that implement the above-described steps in conjunction with a microprocessor or other data processor, the invention as described in this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.

[0099] A computer program can be applied to input data to perform the functions described in this embodiment, thereby transforming the input data to generate output data stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the transformed data represents physical and tangible objects, including a specific visual depiction of the physical and tangible objects generated on the display.

[0100] As described above, only the preferred embodiments of the present invention are given, and the present invention is not limited to the above-described embodiments. As long as the same means are used to achieve the technical effects of the present invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. Within the scope of protection of the present invention, various different modifications and variations can be made to its technical solutions and / or implementation manners.

Claims

1. An electric vehicle charging method, characterized in that, The electric vehicle charging method includes: Setting a target state of charge and a planned vehicle usage time; Detecting battery information of the electric vehicle; The detecting of the battery information of the electric vehicle includes: detecting the power battery of the electric vehicle through a battery management system; using the detected battery temperature at parking, battery charging curve, battery internal resistance, state of charge at parking, total battery capacity, and remaining charging duration as the battery information; Detecting the environmental temperature at parking; Determining the required battery constant-temperature energy consumption at the target time according to the battery information and the environmental temperature at parking; The determining of the required battery constant-temperature energy consumption at the target time according to the battery information and the environmental temperature at parking includes: determining a first temperature difference; the first temperature difference is the difference between the battery temperature at parking and the environmental temperature at parking; determining a predicted battery temperature according to the first temperature difference and a cooling model; the predicted battery temperature is the predicted temperature of the power battery at the target time; determining a second temperature difference; the second temperature difference is the difference between the predicted battery temperature and the environmental temperature at parking; determining the battery constant-temperature energy consumption according to the second temperature difference and a constant-temperature heat dissipation model; Determining the battery heat generation during the charging process according to the battery information, the target time, and the remaining charging duration; Determining the energy absorbed by the battery during charging according to the target state of charge and the battery information; Establishing a first constraint condition according to the target time, the remaining charging duration, and the planned vehicle usage time; Establishing a second constraint condition according to the energy absorbed by the battery during charging, the battery constant-temperature energy consumption, and the battery heat generation during the charging process; Determining the value of the target time that satisfies the first constraint condition and the second constraint condition; Setting the starting time for charging the power battery of the electric vehicle according to the target time.

2. The electric vehicle charging method according to claim 1, characterized in that, The determining of the battery heat generation during the charging process according to the battery information, the target time, and the remaining charging duration includes: Perform calculations according to the formula ; wherein is the heat generated by the battery during the charging process is the target time is the remaining charging duration is the charging current determined according to the battery charging curve is the internal resistance of the battery 3. The electric vehicle charging method according to claim 1, wherein The determining of the energy absorbed by the battery during charging according to the target state of charge and the battery information includes: Perform calculations according to the formula ; wherein absorbs energy for charging the battery is the target state of charge is the state of charge at parking is the total capacity of the battery 4. The electric vehicle charging method according to claim 1, wherein The establishing of the first constraint condition according to the target time, the remaining charging duration, and the planned vehicle usage time includes: According to the formula , determine the first constraint condition; wherein, is the target time, is the remaining charging duration, is the planned vehicle usage time.

5. The electric vehicle charging method according to claim 1, characterized in that The establishing of the second constraint condition according to the energy absorbed by the battery during charging, the battery constant-temperature energy consumption, and the battery heat generation during the charging process includes: According to the formula , determine the second constraint condition; wherein, is the total power consumption during the charging process of the power battery, is the energy absorbed by the battery during charging, is the constant temperature energy consumption of the battery, is the heat generation of the battery during the charging process.

6. The electric vehicle charging method according to any one of claims 1-5, characterized in that, The setting of the starting time for charging the power battery of the electric vehicle according to the target time includes: Detecting a target signal; Determining a target distance according to the target signal; When it is detected that the target distance is less than a distance threshold before the target time, using the time when it is detected that the target distance is less than the distance threshold as the starting time for charging; When it is not detected that the target distance is less than the distance threshold, using the target time as the starting time for charging.

7. A computer device, characterized in that, Including a memory and a processor, the memory is used to store at least one program, and the processor is used to load the at least one program to execute the electric vehicle charging method according to any one of claims 1-6.

8. A computer-readable storage medium storing a program executable by a processor, characterized in that, The program executable by the processor, when executed by the processor, is used to perform the electric vehicle charging method described in any one of claims 1-6.

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