Charging control method, charging control device and vehicle

Abstract

The present application provides a charging control method, including: determining the estimated power demand of a vehicle; detecting the current remaining power of the vehicle; judging whether charging is required based on the estimated power demand and the current remaining power, and determining the target power of the vehicle when it is determined that charging is required; determining the charging start time and the charging end time when the target power is greater than the current remaining power; determining the interval between the charging start time and the charging end time as the charging time; determining the target charging current based on the charging time and the target power; and controlling the vehicle to be charged with the target charging current when it is determined that the vehicle is at the charging start time. The present application also provides a charging control device and a vehicle. The charging control method of the present application determines the target charging current based on the charging time and the target power, and obtains the charging current by adjusting the charging current based on the charging time. On the premise of ensuring that the vehicle is charged to the target power, it is possible to avoid charging the vehicle battery with a large current as much as possible.

Description

Technical Field

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

[0002] The existing scheduled charging method is to charge the vehicle battery according to the scheduled time set by the user. Usually, the scheduled time is the off-peak time. Before the scheduled time is reached, the vehicle and the charging equipment enter a dormant state. When the scheduled time is reached, the vehicle and the charging equipment are awakened and start charging. Under normal circumstances, charging continues until the battery is fully charged, and its charging cut-off SOC state is 100%.

[0003] Although this reservation method reduces electricity costs, it does not take into account the user's actual vehicle needs and continues to charge the battery until it is fully charged, causing the battery to be in a high power state for a long time and easily damaged. In addition, existing charging technologies usually charge electric vehicles at a constant current, which may cause the problem of excessive charging current affecting battery life. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a charging control method, a charging control device and a vehicle, which can determine the target power of the vehicle according to the user's vehicle usage needs, so that the battery of the vehicle is in a lower power state as much as possible, and determine the charging time according to the charging start time and the charging end time, and obtain the target charging current according to the charging time and the target power, and charge the vehicle with the target charging current. By obtaining the charging current according to the charging time, it is possible to avoid charging the vehicle battery with a large current as much as possible while ensuring that the vehicle is charged to the target power, thereby extending the battery life.

[0005] The first aspect of the present application provides a charging control method, which is applied to a vehicle with an electric function, and the charging control method includes: determining an estimated required power of the vehicle; detecting a current remaining power of the vehicle at a current moment; judging whether charging is required based on the estimated required power and the current remaining power, and determining a target power of the vehicle when it is determined that charging is required; determining a charging start time and a charging end time when the target power is greater than the current remaining power; determining the interval between the charging start time and the charging end time as the charging time; determining a target charging current based on the rated capacity of the battery of the vehicle, the charging time and the target power; and controlling the vehicle to be charged with the target charging current when it is determined that the vehicle is at the charging start time.

[0006] The second aspect of the present application provides a charging control device, which is applied to a vehicle with an electric function, and the charging control device includes a detection module and a processing module. The detection module is used to detect the current remaining power of the vehicle at the current moment. The processing module is used to determine the estimated required power of the vehicle, and determine whether charging is required based on the estimated required power and the current remaining power, and when it is determined that charging is required, determine the target power of the vehicle, and when the target power is greater than the current remaining power, determine the charging start time and charging end time, and determine the interval between the charging start time and the charging end time as the charging time, and determine the target charging current based on the rated capacity of the battery of the vehicle, the charging time and the target power, and when it is determined that the vehicle is at the charging start time, control the vehicle to be charged with the target charging current.

[0007] A third aspect of the present application provides a vehicle, comprising the aforementioned charging control device.

[0008] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is invoked and executed by a processor to implement the aforementioned charging control method.

[0009] The charging control method, charging control device, vehicle and computer-readable storage medium provided in the present application can determine the target power of the vehicle according to the user's vehicle use needs, so that the battery of the vehicle is in a lower power state as much as possible, and determine the charging time according to the charging start time and the charging end time, and determine the target charging current according to the charging time and the target power, and control the charging of the vehicle with the target charging current. By obtaining the charging current according to the charging time, it is possible to avoid charging the vehicle battery with a large current as much as possible while ensuring that the vehicle is charged to the target power, thereby extending the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 A flowchart of a charging control method provided in an embodiment of the present application.

[0012] Figure 2 for Figure 1 Sub-flow chart of step S101 in .

[0013] Figure 3 for Figure 1 Sub-flow chart of step S103 in .

[0014] Figure 4 for Figure 3 Sub-flow chart of step S1031 in .

[0015] Figure 5 for Figure 3 Sub-flow chart of step S1032.

[0016] Figure 6 A flowchart for determining the charging start time provided in an embodiment of the present application.

[0017] Figure 7 This is a structural block diagram of the charging control device provided in an embodiment of the present application.

[0018] Figure 8 A structural block diagram of a vehicle provided in an embodiment of the present application.

[0019] Explanation of reference numerals: 100 - charging control device; 10 - detection module; 20 - processing module; 200 - vehicle; 150 - battery; 160 - charging interface. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In the description of this application, the terms "first", "second", etc. are used to distinguish different objects rather than to describe a specific order, and therefore should not be understood as limiting this application.

[0022] In the description of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components; it can be a communication connection; it can be an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] See also Figure 1 , Figure 1 This is a flow chart of a charging control method provided in an embodiment of the present application, and the charging control method is applied to a vehicle with an electric function. Figure 1 As shown, the charging control method includes the following steps:

[0024] S101: Determine the estimated power demand of the vehicle.

[0025] S102: Detect the current remaining power of the vehicle at the current moment.

[0026] S103: Determine whether charging is required based on the estimated required power and the current remaining power, and determine the target power of the vehicle when charging is determined to be required.

[0027] S104: Determine the charging start time and charging end time.

[0028] S105: Determine the interval between the charging start time and the charging end time as the charging duration.

[0029] S106: Determine a target charging current according to the rated capacity of the battery of the vehicle, the charging time, and the target power.

[0030] S107: When it is determined that the vehicle is at the charging start time, controlling the vehicle to be charged with the target charging current.

[0031] The charging control method provided in the embodiment of the present application can determine the target power of the vehicle according to the user's vehicle usage needs, so that the battery of the vehicle is in a lower power state as much as possible, and determine the charging time according to the charging start time and the charging end time, and determine the target charging current according to the charging time and the target power, and control the charging of the vehicle with the target charging current. By obtaining the charging current according to the charging time, it is possible to avoid charging the vehicle battery with a large current as much as possible while ensuring that the vehicle is charged to the target power, thereby extending the battery life.

[0032] The target power level may represent the power level of the vehicle at the end of charging.

[0033] The current remaining power, the estimated required power and the target power are all percentage values ​​of the total power, such as 20%, 70%, 80% and so on.

[0034] In some embodiments, the estimated required power can be determined based on the user's vehicle usage habits. Specifically, the vehicle stores the user's vehicle usage habit data within a preset time period, and the usage habit data includes the charging time of each charge of the vehicle and the mileage of each use of the vehicle within the preset time period. The charging time of each charge is the starting time of the charging.

[0035] See also Figure 2 , Figure 2 for Figure 1 The sub-flow chart of step S101 in FIG. Figure 2As shown, in some embodiments, determining the estimated required power of the vehicle includes:

[0036] S1011: Obtain the mileage N that the vehicle can travel when fully charged.

[0037] S1012: Determine the next charging time after the current time and the total vehicle mileage M in the time period from the current time to the next charging time based on the usage habit data, wherein the total vehicle mileage M is the sum of all vehicle mileages in the time period from the current time to the next charging time.

[0038] S1013: Determine the estimated required power SOC according to the total vehicle mileage M and the drivable mileage N rq , wherein the estimated power demand SOC rq =M / N*100%.

[0039] The preset time period may be 1 day, 1 week, 1 month, 3 months, etc. For example, the preset time period may be 1 week, and the usage habit data includes the charging time of each charging from Monday to Sunday, the mileage of each use of the vehicle each day, and the start time of each use of the vehicle each day. The longer the preset time period, the more common the usage habit data is.

[0040] It can be understood that the usage habit data represents the user's charging and using habits of the vehicle within a preset period of time, and the charging and using habits of most users are predictable and universal. Therefore, the usage habit data within the preset period of time represents the user's past charging and using habits of the vehicle. Unless there are special circumstances, the usage habit data can be used to predict the user's future charging and using habits.

[0041] Wherein, the full charge refers to the maximum available power of the battery of the vehicle, and the maximum available power can be determined based on the maximum storable power of the battery and the preset fixed power. The maximum available power is the difference between the maximum storable power and the preset fixed power. For example, if the maximum storable power is 100% and the preset fixed power is 10%, then the maximum available power is 90%. Wherein, the value of the preset fixed power can be set to other values ​​according to actual needs. The preset fixed power is an unavailable power, that is, when the power of the battery is consumed to equal the preset fixed power, the battery no longer provides power to the vehicle. By setting the preset fixed power, the battery can be prevented from over-discharging due to power exhaustion, thereby extending the battery life.

[0042] In other embodiments, the full charge may be equal to the maximum storable power, that is, 100%.

[0043] It can be understood that the next charging time after the current time can be determined based on the charging time of each charging within the preset time in the usage habit data; and the number of times the car is used and the mileage of each use within the preset time in the usage habit data can be determined, and then the total mileage M of the car in the time period from the current time to the next charging time can be determined. For example, according to the mileage of each use of the car within the preset time, it is determined that there are n times of use of the car in the time period from the current time to the next charging time, the mileage of the first use of the car is M1, the mileage of the second use of the car is M2,..., the mileage of the nth use of the car is Mn, then the total mileage M=M1+M2+...+Mn.

[0044] In this embodiment, the user's vehicle use demand is determined by obtaining the user's vehicle use habit data and the estimated required power is determined based on the vehicle use demand. While meeting the user's vehicle use demand, it can also avoid charging the vehicle to full power and causing the battery to be in a high power state, thereby extending the battery life. In addition, by obtaining the user's usage habit data to determine the user's total vehicle mileage from the current moment to the next charging moment and determining the estimated required power based on the total vehicle mileage, the power consumption of the vehicle is calculated intelligently, quickly, and easily to obtain the estimated required power. In addition, since the largest power consumption in the use of the vehicle is the length of the driving distance, determining the estimated required power based on the total vehicle mileage takes into account the actual use of the vehicle by the user.

[0045] In some other embodiments, the estimated power demand may be preset by the user according to actual vehicle usage needs. For example, the user inputs the estimated power demand as 70% in the vehicle's multimedia interface according to actual vehicle usage needs.

[0046] In some other embodiments, the estimated required electricity amount may also be 100%.

[0047] See also Figure 3 , Figure 3 for Figure 1 The sub-flow chart of step S103 in FIG. Figure 3 As shown, in some embodiments, judging whether charging is required based on the estimated required power and the current remaining power, and determining the target power when charging is determined to be required, includes:

[0048] S1031: When it is determined that the estimated required power is greater than the current remaining power, it is determined that charging is required, and a target power of the vehicle is determined based on a relationship between the estimated required power and a threshold value for preventing over-discharge of the vehicle.

[0049] S1032: When it is determined that the estimated required power is less than or equal to the current remaining power, determine whether charging is required based on the relationship between the current remaining power and the vehicle's over-discharge prevention threshold, and determine the target power of the vehicle.

[0050] See also Figure 4 , Figure 4 for Figure 3 The sub-flow chart of step S1031 in FIG. Figure 4 As shown, in some embodiments, when determining that the estimated required power is greater than the current remaining power, determining that charging is required, and determining the target power of the vehicle according to the relationship between the estimated required power and the over-discharge prevention threshold of the vehicle, includes:

[0051] S10311: When it is determined that the estimated required power is greater than the current remaining power, and the sum of the estimated required power and the preset power is greater than or equal to the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the sum of the estimated required power and the preset power.

[0052] S10312: When it is determined that the estimated required power is greater than the current remaining power, and the sum of the estimated required power and the preset power is less than the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the over-discharge prevention threshold.

[0053] The preset power level can be set by the user according to the requirements. In some embodiments, the preset power level can be a value between 0 and 15%, for example, 0, 10%, 15%.

[0054] The over-discharge prevention threshold value may be set by the user according to the requirements. In some embodiments, the over-discharge prevention threshold value may be a value between 20% and 40%, for example, 25% or 30%.

[0055] Wherein, when it is determined that the estimated power demand is greater than the current remaining power, it is determined that the vehicle needs to be charged. When it is determined that the vehicle needs to be charged, the sum of the estimated power demand and the preset power is compared with the over-discharge prevention threshold. When it is determined that the sum of the estimated power demand and the preset power is greater than or equal to the over-discharge prevention threshold, it is determined that the target power that the vehicle needs to be charged to is equal to the sum of the estimated power demand and the preset power; when it is determined that the sum of the estimated power demand and the preset power is less than the over-discharge prevention threshold, it is determined that the target power that the vehicle needs to be charged to is equal to the over-discharge prevention threshold.

[0056] For example, the estimated power demand is 60%, the current remaining power is 20%, the preset power is 10%, and the over-discharge prevention threshold is 30%, then it is determined that the vehicle needs to be charged, and the target power is 60%+10%=70%; for another example, the estimated power demand is 15%, the current remaining power is 10%, the preset power is 10%, and the over-discharge prevention threshold is 30%, then it is determined that the vehicle needs to be charged, and the target power is 30%.

[0057] Among them, when the preset power is greater than 0 and the vehicle needs to be charged, the vehicle is controlled to be charged to the target power equal to the sum of the estimated demand power and the preset power, so that the target power of the vehicle can meet the user's vehicle use needs, and the vehicle also stores the preset power as a backup, which can prevent the user from temporarily increasing the vehicle mileage, resulting in the vehicle being unable to be used due to insufficient power. In addition, the preset power can also be used as a correction compensation amount for the power charged into the vehicle. Specifically, since the power charged into the battery of the vehicle during the charging process may deviate from the set value, by controlling the vehicle to be charged to the target power equal to the sum of the estimated demand power and the preset power, the deviation of the power charged during the charging process can be compensated, so that the target power is at least greater than the estimated demand power, and the user's vehicle use needs are met.

[0058] Among them, by controlling the target power of the vehicle to be greater than or equal to the over-discharge prevention threshold, the vehicle can have sufficient power for the battery self-discharge process when it is stationary, thereby preventing the battery from being over-discharged and shortening the battery life.

[0059] See also Figure 5 , Figure 5 for Figure 3 The sub-flow chart of step S1032 in FIG. Figure 5 As shown, in some embodiments, when it is determined that the estimated required power is less than or equal to the current remaining power, determining whether charging is required according to the relationship between the current remaining power and the over-discharge prevention threshold of the vehicle, and determining the target power of the vehicle include:

[0060] S10321: When it is determined that the estimated required power is less than or equal to the current remaining power, and the current remaining power is less than the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the over-discharge prevention threshold.

[0061] S10322: When it is determined that the estimated required power is less than or equal to the current remaining power, and the current remaining power is greater than or equal to the over-discharge prevention threshold, it is determined that charging is not required.

[0062] When it is determined that the estimated power demand is less than or equal to the current remaining power, the current remaining power is compared with the over-discharge prevention threshold. When it is determined that the current remaining power is less than the over-discharge prevention threshold, it is determined that the vehicle needs to be charged, and the target power that the vehicle needs to be charged to is equal to the over-discharge prevention threshold. For example, if the estimated power demand is 20%, the current remaining power is 25%, and the over-discharge prevention threshold is 30%, it is determined that the vehicle needs to be charged, and the target power is 30%.

[0063] When it is determined that the estimated power demand is less than or equal to the current remaining power, the current remaining power is compared with the over-discharge prevention threshold, and when it is determined that the current remaining power is greater than or equal to the over-discharge prevention threshold, it is determined that the vehicle does not need to be charged. For example, if the estimated power demand is 20%, the current remaining power is 50%, and the over-discharge prevention threshold is 30%, it is determined that the vehicle does not need to be charged.

[0064] Among them, when the vehicle needs to be charged, the vehicle is controlled to be charged to the target power that is greater than or equal to the over-discharge prevention threshold, so that when the vehicle is stationary, it has sufficient power for the battery self-discharge process, thereby preventing the battery from being over-discharged and shortening the battery life.

[0065] In the embodiment of the present application, it is determined whether the vehicle needs to be charged and the target power is determined when the vehicle needs to be charged based on the estimated required power, the current remaining power, the preset power and the over-discharge prevention threshold, so that not only the target power of the vehicle meets the user's vehicle use needs before the next charging time, but also excessive charging or charging when the vehicle does not need to be charged can be prevented so that the vehicle is in a higher power state, thereby extending the battery life. In addition, when the current remaining power is greater than or equal to the estimated required power and greater than or equal to the over-discharge prevention threshold, it is determined that the vehicle does not need to be charged, that is, the current remaining power can meet the user's vehicle use needs, thereby avoiding unnecessary charging of the vehicle, resulting in the battery being in a high power state and shortening its life.

[0066] In some other embodiments, when the estimated required power is less than or equal to the current remaining power, it is determined that the vehicle does not need to be charged. The current remaining power of the vehicle can already meet the user's vehicle demand, so the vehicle does not need to be charged.

[0067] See also Figure 6 , Figure 6 This is a flow chart for determining the charging start time provided in an embodiment of the present application. Figure 6As shown, in some embodiments, the vehicle stores a low-peak time period for electricity use, and determining the charging start time includes:

[0068] S1041: When the current time is before the low-peak power consumption period, determine the start time of the low-peak power consumption period as the charging start time.

[0069] S1042: When the current time is within a low-peak power consumption period, determine the current time as the charging start time.

[0070] For example, the low-peak electricity consumption period is from 23:00 on March 25 to 7:00 on March 26, and the current time is 20:00 on March 25, then 23:00 on March 25 is determined as the charging start time; for another example, the current time is 1:00 on March 26, then 1:00 on March 26 is determined as the charging start time.

[0071] The setting of the low-peak electricity consumption time period is related to different regions, different seasons, regional electricity consumption conditions, etc. The power grid companies in each region usually set the low-peak electricity consumption time period according to their respective seasons and regional electricity consumption conditions.

[0072] In the embodiment of the present application, when the current time is before the low-peak power consumption period, by setting the start time of the low-peak power consumption period as the charging start time, charging is achieved during the low-peak power consumption period, reducing the electricity cost and the power load of the power grid. When the current time is within the low-peak power consumption period, by setting the current time as the charging start time, the electricity cost is also reduced and the power load of the power grid is reduced.

[0073] In some other embodiments, the determining of the charging start time includes: determining the first time set by the user as the charging start time, that is, the charging start time is set by the user. For example, the user inputs the charging start time as 19:00 on March 25 through the multimedia interface of the vehicle, then the charging start time is determined to be 19:00 on March 25. In some embodiments, the determining of the charging end time includes: determining the next vehicle use start time and using the next vehicle use start time as the charging end time.

[0074] In some embodiments, the usage habit data may include the start time of each use of the vehicle within the preset time period, and determining the next start time of use of the vehicle includes: determining the next start time of use of the vehicle after the current time based on the usage habit data.

[0075] The usage habit data may be represented by a vehicle usage habit table, which may include the vehicle usage mileage and usage time period of the vehicle each time it is used each day within the preset time period, as well as the charging time of each charge. For example, if the preset time period is one week, the vehicle usage habit table includes the vehicle usage mileage and usage time period of the vehicle each time it is used from Monday to Sunday, as well as the charging time of each charge. Exemplarily, if the current time is time T on Wednesday, the first vehicle usage time period after time T on Wednesday may be queried in the vehicle usage habit table, and the starting time of the vehicle usage time period is used as the starting time of the next vehicle usage.

[0076] In this embodiment, by setting the next vehicle use start time as the charging cut-off time, on the one hand, it can prevent the vehicle battery from being charged to the target power in advance, thereby shortening the time the battery is in a higher power state; on the other hand, since the charging process is terminated at the next vehicle use start time, the time for charging the battery can be extended, so that the charging time of the battery is as long as possible. Under a longer charging time, the battery can be charged with a smaller current, preventing the battery from being charged with a large current and shortening the battery life.

[0077] In some other embodiments, the determining of the charging cut-off time includes: determining the second time set by the user as the charging cut-off time, that is, the charging cut-off time is specified by the user. For example, if the user inputs the charging cut-off time as 5:00 on March 26 through the multimedia interface of the vehicle, the charging cut-off time is determined to be 5:00 on March 26.

[0078] In some embodiments, determining the target charging current according to the rated capacity of the battery of the vehicle, the charging time and the target power includes: according to a first formula The target charging current is calculated, where I is the target charging current, SOC end is the target power, the SOC current is the current remaining power, C ap is the rated capacity of the battery of the vehicle, and t is the charging time.

[0079] Among them, C ap The specific value of depends on the type of battery. ap It is 60Ah.

[0080] For example, SOC end 80%, SOC current 20%, C ap is 60Ah, t is 5h, then I = (80% - 20%) * 60 / 5 = 7.2A.

[0081] Among them, the target power minus the current remaining power can be used to obtain the power required to be charged to the vehicle, and the target charging current obtained by dividing the power by the charging time is the output current of the power supply device connected to the vehicle. The power supply device can charge the required power to the vehicle within the charging time by outputting an output current equal to the target charging current to the battery, so that the power of the vehicle meets the travel needs of the user, and the battery will not be in a fully charged state and the life can be extended. In addition, the target charging current is determined according to the first formula, so that when the current remaining power and the target power are constant, the target charging current can be obtained according to the charging time. Since it is not charged with a constant current each time, but with a target charging current obtained according to the charging time of each charging of the vehicle, it can be avoided as much as possible to charge the battery with a large current. By using the next vehicle start time as the charging cut-off time, the battery charging time can be extended, and then the target charging current can be reduced, so that the battery can be charged with as small a current as possible to extend the battery life.

[0082] In some embodiments, the charging control method further includes: when it is determined that the vehicle is at the charging cut-off time, controlling to stop charging the vehicle.

[0083] The vehicle further includes a clock (not shown) for recording time. When the vehicle is charging, the time at which the vehicle is located is determined by the clock. When it is determined that the vehicle is at the charging cut-off time, the charging of the vehicle is stopped by disconnecting the vehicle from the power supply equipment (e.g., a charging pile).

[0084] In this embodiment, charging is controlled to stop when the vehicle is at the charging cut-off time, which not only meets the user's vehicle use needs, but also prevents the battery from being in a high power state due to excessive charging, thereby extending the battery life.

[0085] In some other embodiments, the charging control method further includes: when it is determined that the power level of the vehicle has reached the target power level, controlling to stop charging the vehicle.

[0086] When the vehicle is charging, the power level of the vehicle is detected in real time. When it is detected that the power level of the vehicle reaches the target power level, the charging of the vehicle is stopped by disconnecting the vehicle from a power supply device (e.g., a charging pile).

[0087] In this embodiment, charging is stopped when the power of the vehicle reaches the target power. This can not only prevent the battery from being in a high power state due to excessive charging, but also prevent the vehicle from failing to be charged to the target power within the charging time due to unstable output current of the power supply equipment during the charging process.

[0088] See also Figure 7 , Figure 7 1 is a structural block diagram of a charging control device 100 provided in an embodiment of the present application. The charging control device 100 is applied to a vehicle with an electric function. Figure 7 As shown, the charging control device 100 includes a detection module 10 and a processing module 20. The detection module 10 is used to detect the current remaining power of the vehicle at the current moment. The processing module 20 is used to determine the estimated required power of the vehicle, and based on the determined estimated required power of the vehicle, detect the current remaining power of the vehicle at the current moment, and determine the target power of the vehicle based on the estimated required power and the current remaining power, and when the target power is greater than the current remaining power, determine the charging start time and the charging end time, determine the interval between the charging start time and the charging end time as the charging time, and determine the target charging current based on the rated capacity of the battery of the vehicle, the charging time and the target power, and when it is determined that the vehicle is at the charging start time, control the vehicle to be charged with the target charging current.

[0089] The charging control device 100 provided in the embodiment of the present application can determine the target power of the vehicle according to the user's vehicle use needs, so that the battery of the vehicle is in a lower power state as much as possible, and determine the charging time according to the charging start time and the charging end time, and determine the target charging current according to the charging time and the target power, and control the charging of the vehicle with the target charging current. By obtaining the charging current according to the charging time, it is possible to avoid charging the vehicle battery with a large current as much as possible while ensuring that the vehicle is charged to the target power, thereby extending the battery life.

[0090] The processing module 20 may be a processing chip such as a processor, a controller, or a single-chip microcomputer. The detection module 10 may be a voltage detector for detecting the voltage of the battery and obtaining the corresponding power according to a preset mapping relationship between the voltage and power, or the detection module 10 may be integrated with the processing module 20 in the same processing chip.

[0091] In some embodiments, the charging control device 100 further includes a storage module (not shown in the figure), and the storage module stores the vehicle usage habit data of the user within a preset time period, and the usage habit data includes the charging time of each charging of the vehicle and the vehicle mileage of each use of the vehicle within the preset time period. The processing module 20 is used to obtain the mileage N that the vehicle can travel when fully charged, and determine the next charging time after the current time and the total mileage M of the vehicle in the time period from the current time to the next charging time according to the usage habit data, wherein the total mileage M of the vehicle is the sum of all vehicle mileages in the time period from the current time to the next charging time, and determine the estimated required power SOC according to the total mileage M of the vehicle and the mileage N. rq , wherein the estimated power demand SOC rq =M / N*100%.

[0092] The storage module may be a solid state drive, an SD card, or the like.

[0093] In some embodiments, the processing module 20 is used to determine that charging is required when it is determined that the estimated required power is greater than the current remaining power, and determine the target power of the vehicle based on the relationship between the estimated required power and the vehicle's over-discharge prevention threshold. When it is determined that the estimated required power is less than or equal to the current remaining power, determine whether charging is required and determine the target power of the vehicle based on the relationship between the current remaining power and the vehicle's over-discharge prevention threshold.

[0094] In some embodiments, the processing module 20 is used to determine that charging is required and that the target power is equal to the sum of the estimated required power and the preset power when it is determined that the estimated required power is greater than the current remaining power and the sum of the estimated required power and the preset power is greater than or equal to the over-discharge prevention threshold; and to determine that charging is required and that the target power is equal to the over-discharge prevention threshold when it is determined that the estimated required power is greater than the current remaining power and the sum of the estimated required power and the preset power is less than the over-discharge prevention threshold.

[0095] In some embodiments, the processing module 20 is used to determine that charging is required and that the target power is equal to the over-discharge prevention threshold when it is determined that the estimated required power is less than or equal to the current remaining power and the current remaining power is less than the over-discharge prevention threshold, and to determine that charging is not required when it is determined that the estimated required power is less than or equal to the current remaining power and the current remaining power is greater than or equal to the over-discharge prevention threshold.

[0096] In some embodiments, the storage module also stores a low-peak power consumption time period, and the processing module 20 is used to determine that when the current moment is before the low-peak power consumption time period, the starting moment of the low-peak power consumption time period is the charging start time, and when the current moment is within the low-peak power consumption time period, determine the current moment as the charging start time.

[0097] In some other embodiments, the processing module 20 is used to determine the first time set by the user as the charging start time.

[0098] In some embodiments, the processing module 20 is used to determine the next vehicle use start time and use the next vehicle use start time as the charging cut-off time.

[0099] In some embodiments, the usage habit data also includes the start time of each use of the vehicle, and the processing module 20 is used to determine the next start time of use of the vehicle after the current time according to the usage habit data.

[0100] In some other embodiments, the processing module 20 is used to determine the second time set by the user as the charging cut-off time.

[0101] In some embodiments, the processing module 20 is used to The target charging current is calculated, where I is the target charging current, SOC end is the target power, the SOC current is the current remaining power, C ap is the rated capacity of the battery of the vehicle, and t is the charging time.

[0102] In some embodiments, the processing module 20 is further configured to control stopping charging of the vehicle when it is determined that the vehicle is at the charging cut-off time.

[0103] The vehicle further includes a clock (not shown) for recording time. When the vehicle is charging, the time at which the vehicle is located is determined by the clock. When it is determined that the vehicle is at the charging cut-off time, the processing module 20 controls the stopping of charging of the vehicle by disconnecting the vehicle from the power supply equipment (e.g., a charging pile).

[0104] In this embodiment, charging is controlled to stop when the vehicle is at the charging cut-off time, which not only meets the user's vehicle use needs, but also prevents the battery from being in a high power state due to excessive charging, thereby extending the battery life.

[0105] In some other embodiments, the processing module 20 is further configured to control stopping charging of the vehicle when it is determined that the power level of the vehicle has reached the target power level.

[0106] Among them, the detection module 10 is also used to detect the power level of the vehicle in real time. When the detection module 10 detects that the power level of the vehicle reaches the target power level, the processing module 20 controls to stop charging the vehicle by disconnecting the vehicle from the power supply equipment (for example, a charging pile).

[0107] In this embodiment, charging is stopped when the power of the vehicle reaches the target power. This can not only prevent the battery from being in a high power state due to excessive charging, but also prevent the vehicle from failing to be charged to the target power within the charging time due to unstable output current of the power supply equipment during the charging process.

[0108] In some embodiments, the charging control device 100 may be disposed in the vehicle, and the charging control device 100 further includes a communication module (not shown) and a control switch (not shown), wherein the communication module is used to communicate with a power supply device, the power supply device is used to charge the vehicle, and the control switch is connected between the battery of the vehicle and the charging interface of the vehicle. When the power supply device is connected to the charging interface of the vehicle, the control switch is used to connect the battery to the power supply device when in the on state, and disconnect the battery from the power supply device when in the off state. The power supply device may be a charging pile, etc.

[0109] When it is determined that the vehicle needs to be charged and the time reaches the charging start time, the processing module 20 sends a charging instruction for charging with the target charging current to the communication module, and controls the control switch to switch from an off state to an on state to connect the battery and the power supply device. The communication module sends the charging instruction to the power supply device, and the power supply device outputs the target charging current to the battery of the vehicle at the charging start time based on the charging instruction to charge the vehicle.

[0110] In some embodiments, when the vehicle is at the charging cut-off time, the processing module 20 sends a command to stop charging to the communication module, and controls the control switch to switch from an on state to a off state to disconnect the battery and the power supply device, and the communication module sends the command to stop charging to the power supply device, and the power supply device stops outputting power based on the command to stop charging.

[0111] In some other embodiments, when the power of the vehicle reaches the target power, the processing module 20 sends a stop charging instruction to the communication module, and controls the control switch to switch from an on state to a off state to disconnect the battery and the power supply device. The communication module sends the stop charging instruction to the power supply device, and the power supply device stops outputting power based on the stop charging instruction.

[0112] When it is determined that the vehicle does not need to be charged, the processing module 20 controls the control switch to remain in a closed state and keeps the battery disconnected from the power supply device, so that the power supply device cannot charge the battery.

[0113] In some embodiments, the charging control device 100 also includes a current regulating module (not shown), which is connected between the battery of the vehicle and the control switch. The current regulating module is used to regulate the current input into the battery of the vehicle. The detection module 10 is also used to detect the output current of the power supply device in real time. When the detection module 10 detects that the output current is greater than or less than the target charging current, the processing module 20 controls the current regulating module to adjust the output current to be equal to the target charging current, and outputs the adjusted current to the battery, so that the current input into the battery is equal to the target charging current. Therefore, the vehicle can be charged to a level equal to the target level within the charging time, thereby meeting the user's car use needs.

[0114] The power supply device may be a DC charging pile or an AC charging pile. The communication module may communicate with the power supply device via a CAN (Controller Area Network) bus. The control switch may be a DC contactor or an AC contactor.

[0115] Among them, the above-mentioned method of the present application and the functional operations performed by the charging control device 100 can be performed after the charging interface of the vehicle is connected to the power supply equipment.

[0116] Among them, the charging control device 100 corresponds to the aforementioned charging control method. For more detailed description, please refer to the contents of each embodiment of the aforementioned charging control method. The contents of the charging control device 100 and the aforementioned charging control method can also refer to each other.

[0117] See also Figure 8 , Figure 8 The vehicle 200 provided in the embodiment of the present application. Figure 8 As shown, the vehicle 200 includes a battery 150, a charging interface 160, and a charging control device 100 provided by any of the aforementioned embodiments.

[0118] The battery 150 is connected to the charging control device 100, and the charging control device 100 is used to control the charging process of the battery 150. The charging interface 160 is connected to the charging control device 100. The charging interface 160 is used to connect to the power supply device, so that the power supply device can charge the battery 150 through the charging interface 160.

[0119] The vehicle 200 involved in the embodiment of the present application may be a vehicle with a built-in power battery, such as a pure electric vehicle, a hybrid vehicle, etc. When the vehicle 200 is a hybrid vehicle, the total vehicle mileage M corresponds to the portion of the hybrid vehicle driven by the power of the battery 150. The vehicle 200 may be a pure electric vehicle, a pure electric truck, a pure electric truck, a hybrid vehicle, a hybrid truck, a hybrid truck, etc.

[0120] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is invoked and executed by a processor to implement the information push method provided in any of the aforementioned embodiments.

[0121] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0122] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0123] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0124] The above is an implementation method of the embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A charging control method, applied to a vehicle with electric function, It is characterized in that The charging control method comprises: determining an estimated power demand of the vehicle; Detecting the current remaining power of the vehicle at the current moment; Determining whether charging is required based on the estimated required power and the current remaining power, and determining a target power of the vehicle when charging is determined to be required; Determine the charging start time and charging end time; Determine the interval between the charging start time and the charging end time as the charging time; Determining a target charging current according to the rated capacity of the battery of the vehicle, the charging time, and the target power; and When it is determined that the vehicle is at the charging start time, controlling the vehicle to be charged with the target charging current; The determining whether charging is required according to the estimated required power and the current remaining power, and determining the target power of the vehicle when charging is determined to be required, includes: When it is determined that the estimated required power is greater than the current remaining power, it is determined that charging is required, and a target power of the vehicle is determined based on a relationship between the estimated required power and a threshold value for preventing over-discharge of the vehicle; The step of determining that the estimated required power is greater than the current remaining power, determining that charging is required, and determining the target power of the vehicle according to the relationship between the estimated required power and the over-discharge prevention threshold of the vehicle includes: When it is determined that the estimated required power is greater than the current remaining power, and the sum of the estimated required power and the preset power is greater than or equal to the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the sum of the estimated required power and the preset power; When it is determined that the estimated required power is greater than the current remaining power, and the sum of the estimated required power and the preset power is less than the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the over-discharge prevention threshold.

2. The charging control method according to claim 1, It is characterized in that The vehicle stores a low-peak time period for electricity usage, and the determining of the charging start time includes: When the current time is before the low-peak power consumption period, the start time of the low-peak power consumption period is determined as the charging start time; when the current time is within the low-peak power consumption period, the current time is determined as the charging start time; or The first time point set by the user is determined as the charging start time point.

3. The charging control method according to claim 1, It is characterized in that The vehicle stores a low-peak time period for electricity usage, and determines the charging cut-off time, including: Determine the next vehicle use start time and use the next vehicle use start time as the charging end time; or The second time point set by the user is determined as the charging cut-off time point.

4. The charging control method according to claim 3, It is characterized in that The vehicle stores the vehicle usage habit data of the user within a preset time period, the usage habit data includes the vehicle use start time of each use of the vehicle within the preset time period, and the determining of the next vehicle use start time includes: The next vehicle use start time after the current time is determined according to the usage habit data.

5. The charging control method according to claim 1, It is characterized in that The determining the target charging current according to the rated capacity of the battery of the vehicle, the charging time and the target power includes: According to the first formula Calculating the target charging current; Where, I is the target charging current, SOC end is the target power, the SOC current is the current remaining power, C ap is the rated capacity of the battery of the vehicle, and t is the charging time.

6. The charging control method according to claim 1, It is characterized in that The vehicle stores the vehicle usage habit data of the user within a preset time period, the usage habit data including the charging time of each charging of the vehicle and the vehicle mileage of each use of the vehicle within the preset time period, and the determining of the estimated required power of the vehicle includes: Obtaining the mileage N of the vehicle when it is fully charged; Determine the next charging time after the current time and the total vehicle mileage M in the time period from the current time to the next charging time according to the usage habit data, wherein the total vehicle mileage M is the sum of all vehicle mileages in the time period from the current time to the next charging time; and Determine the estimated required power SOC according to the total vehicle mileage M and the drivable mileage N rq , wherein the estimated power demand SOC rq =M / N*100%.

7. The charging control method according to claim 1, It is characterized in that The determining whether charging is required according to the estimated required power and the current remaining power, and determining the target power of the vehicle when charging is determined to be required, further includes: When it is determined that the estimated required power is less than or equal to the current remaining power, whether charging is required and the target power of the vehicle are determined according to the relationship between the current remaining power and the over-discharge prevention threshold of the vehicle.

8. The charging control method according to claim 7, It is characterized in that When it is determined that the estimated required power is less than or equal to the current remaining power, determining whether charging is required according to a relationship between the current remaining power and a threshold value for preventing over-discharge of the vehicle, and determining a target power of the vehicle include: When it is determined that the estimated required power is less than or equal to the current remaining power, and the current remaining power is less than the over-discharge prevention threshold, it is determined that charging is required and the target power is equal to the over-discharge prevention threshold; When it is determined that the estimated required power is less than or equal to the current remaining power, and the current remaining power is greater than or equal to the over-discharge prevention threshold, it is determined that charging is not required.

9. The charging control method according to claim 1, It is characterized in that The method further comprises: When it is determined that the vehicle is at the charging cut-off time, controlling to stop charging the vehicle; or When it is determined that the power level of the vehicle has reached the target power level, control stops charging the vehicle.

10. A charging control device, applied to a vehicle with electric function, It is characterized in that The charging control device comprises: A detection module, used to detect the current remaining power of the vehicle at the current moment; a processing module, configured to determine an estimated power requirement of the vehicle, and determine whether charging is required based on the estimated power requirement and the current remaining power, and when it is determined that charging is required, determine a target power of the vehicle, determine a charging start time and a charging end time, and determine an interval between the charging start time and the charging end time as a charging duration, and determine a target charging current based on a rated capacity of a battery of the vehicle, the charging duration, and the target power, and when it is determined that the vehicle is at the charging start time, control the vehicle to be charged with the target charging current; The processing module is used to determine that charging is required when it is determined that the estimated required power is greater than the current remaining power, and determine the target power of the vehicle according to the relationship between the estimated required power and the over-discharge prevention threshold of the vehicle; The processing module is used to determine that charging is required and that the target power is equal to the sum of the estimated required power and the preset power when it is determined that the estimated required power is greater than the current remaining power and the sum of the estimated required power and the preset power is greater than or equal to the over-discharge prevention threshold; and to determine that charging is required and that the target power is equal to the over-discharge prevention threshold when it is determined that the estimated required power is greater than the current remaining power and the sum of the estimated required power and the preset power is less than the over-discharge prevention threshold.

11. The charging control device according to claim 10, It is characterized in that The vehicle stores a time period of low electricity consumption, and the processing module is used to determine the start time of the low electricity consumption time period as the charging start time when the current time is before the low electricity consumption time period; the processing module is also used to determine the current time as the charging start time when the current time is within the low electricity consumption time period, or the processing module determines the charging start time according to a user instruction.

12. The charging control device according to claim 10, It is characterized in that The vehicle stores a low-peak electricity usage time period, and the processing module is used to determine the next vehicle usage start time and use the next vehicle usage start time as the charging cut-off time, or the processing module determines the charging cut-off time according to a user instruction.

13. The charging control device according to claim 12, It is characterized in that The vehicle stores the user's vehicle usage habit data within a preset time period, and the usage habit data includes the start time of each use of the vehicle within the preset time period. The processing module is also used to determine the next start time of vehicle use after the current time based on the usage habit data.

14. The charging control device according to claim 10, It is characterized in that The processing module is used to calculate the first formula The target charging current is calculated, where I is the target charging current, SOC end is the target power, the SOC current is the current remaining power, C ap is the rated capacity of the battery of the vehicle, and t is the charging time.

15. The charging control device according to claim 10, It is characterized in that The vehicle stores the vehicle usage habit data of the user within a preset time period, the usage habit data includes the charging time of each charging of the vehicle and the vehicle mileage of each use of the vehicle within the preset time period, the processing module is used to obtain the mileage N that the vehicle can travel when fully charged, and determine the next charging time after the current time and the total vehicle mileage M in the time period from the current time to the next charging time according to the usage habit data, wherein the total vehicle mileage M is the sum of all vehicle mileages in the time period from the current time to the next charging time, and determine the estimated required power SOC according to the total vehicle mileage and the mileage N rq , wherein the SOC rq =M / N*100%.

16. The charging control device according to claim 10, It is characterized in that When the processing module determines that the estimated required power is less than or equal to the current remaining power, it determines whether charging is required and determines the target power of the vehicle according to the relationship between the current remaining power and the over-discharge prevention threshold of the vehicle.

17. The charging control device according to claim 16, It is characterized in that The processing module is also used to determine that charging is required and that the target power is equal to the over-discharge prevention threshold when it is determined that the estimated required power is less than or equal to the current remaining power and the current remaining power is less than the over-discharge prevention threshold, and to determine that charging is not required when it is determined that the estimated required power is less than or equal to the current remaining power and the current remaining power is greater than or equal to the over-discharge prevention threshold.

18. The charging control device according to claim 10, It is characterized in that The processing module is further configured to control stopping charging of the vehicle when it is determined that the vehicle is at the charging cut-off time, or control stopping charging of the vehicle when it is determined that the power level of the vehicle reaches the target power level.

19. A vehicle, It is characterized in that The vehicle includes the charging control device according to any one of claims 10-18.

20. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores a computer program, and the computer program is called and executed by a processor to implement the charging control method according to any one of claims 1 to 9.

Images