Charging control method, device, system and storage medium

Abstract

This invention discloses a charging control method, device, system, and storage medium, relating to the field of charging control. The method includes: acquiring the charging demand and total allowable charging time of a target battery; predicting the required charging time based on the charging demand using a preset charging estimation rule to obtain an estimated charging time; when the estimated charging time is less than the total allowable charging time, determining a target charging period based on the estimated charging time, the total allowable charging time, and a preset electricity consumption period distribution table; determining a target charging current based on the maximum allowable charging current of the target battery and the estimated charging current obtained from the charging demand and the estimated charging time; and charging the target battery according to the target charging current during the target charging period. This invention solves the problem that existing charging control methods cannot consider the influence of charging parameters, leading to a negative impact on user experience, and achieves more economical charging control as well as improved battery life and charging safety.

Description

Technical Field

[0001] This invention relates to the field of charging control technology, and in particular to a charging control method, device, system and storage medium. Background Technology

[0002] With the development of new energy vehicles such as pure electric vehicles and plug-in hybrid electric vehicles, the charging technology for their power batteries is also constantly evolving. However, current charging control methods are limited to simply setting charging duration or charging amount. In actual charging, electricity prices vary significantly at different times of day, and current charging control methods cannot account for the impact of charging costs, charging current, and electricity consumption, hindering more economical charging and negatively affecting user experience. Summary of the Invention

[0003] The main objective of this invention is to provide a charging control method, device, system, and storage medium, aiming to solve the technical problem that existing charging control methods cannot take into account the influence of charging parameters, thus affecting the user experience.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a charging control method, the method comprising:

[0006] Obtain the target battery's charging requirements and total allowed charging time;

[0007] Based on the charging demand, the charging time required is predicted using a preset charging estimation rule to obtain the estimated charging time.

[0008] When the estimated charging time is less than the total allowed charging time, the target charging time period is determined based on the estimated charging time, the total allowed charging time, and the preset electricity consumption time distribution table.

[0009] The target charging current is determined based on the maximum allowable charging current and the estimated charging current of the target battery, wherein the estimated charging current is obtained based on the charging amount requirement and the estimated charging time.

[0010] During the target charging period, the target battery is charged according to the target charging current.

[0011] Optionally, in the above charging control method, the step of obtaining the target battery's charging requirement and the total allowed charging time includes:

[0012] The charging requirement is obtained based on the current charge level and the target charge level of the target battery.

[0013] The total allowed charging time is obtained based on the charging start time and the user-set charging end time.

[0014] Optionally, in the above charging control method, the step of predicting the charging time required based on the charging demand using a preset charging estimation rule to obtain the estimated charging time includes:

[0015] Obtain the real-time battery temperature of the target battery;

[0016] Based on the real-time battery temperature and the charging requirement, the estimated charging time is predicted using a preset charging prediction rule; wherein the charging prediction rule is set based on the target battery temperature, charging quantity, and charging time.

[0017] Optionally, in the above charging control method, the step of determining the target charging period based on the estimated charging time, the total allowable charging time, and the preset electricity consumption period distribution table includes:

[0018] Based on the total allowed charging time and the preset electricity consumption time distribution table, the allowed charging time period is determined; wherein, the electricity consumption time distribution table includes electricity consumption categories and their corresponding electricity prices and time periods, and the electricity consumption categories include off-peak periods, flat periods and peak-valley periods;

[0019] Based on the estimated charging duration and the permitted charging period, the target charging period is determined according to the priority of the electricity consumption category; wherein the priority of the off-peak period, the flat period, and the peak-valley period decreases in that order.

[0020] Optionally, in the above charging control method, the step of determining the target charging current based on the maximum allowable charging current of the target battery and the estimated charging current includes:

[0021] Obtain the real-time battery temperature and real-time battery charge of the target battery;

[0022] Based on the real-time battery temperature and the real-time battery charge, the maximum allowable charging current for the target battery is obtained using a preset current limiting rule; wherein, the current limiting rule is set based on the battery temperature, battery charge, and charging current of the target battery.

[0023] The minimum value between the maximum charging current and the estimated charging current is determined as the target charging current.

[0024] Optionally, in the above charging control method, the step of determining the minimum value between the maximum charging current and the estimated charging current as the target charging current includes:

[0025] Obtain the maximum output current of the charging device that charges the target battery;

[0026] The minimum value among the maximum output current, the maximum charging current, and the estimated charging current is determined as the target charging current.

[0027] Optionally, in the above charging control method, after the step of predicting the required charging time based on the charging demand using a preset charging estimation rule to obtain the estimated charging time, the method further includes:

[0028] When the estimated charging time is greater than or equal to the total allowed charging time, the target charging period is determined based on the total allowed charging time.

[0029] The target charging current is determined as the maximum allowable charging current of the target battery; or...

[0030] The target charging current is determined by the minimum value between the maximum allowable charging current of the target battery and the maximum output current of the charging device that charges the target battery.

[0031] The maximum allowable charging current of the target battery is obtained based on the real-time battery temperature and real-time battery charge using a preset current limiting rule.

[0032] Secondly, the present invention provides a charging control device, the charging control device including a processor and a memory, the memory storing a charging control program, and when the charging control program is executed by the processor, implementing the charging control method as described above.

[0033] Thirdly, the present invention provides a charging control system, the system comprising:

[0034] Charging equipment;

[0035] Target battery;

[0036] Such as the charging control device mentioned above;

[0037] The target battery is connected to the charging device, and the charging control device is connected to both the charging device and the target battery.

[0038] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by one or more processors, implements the charging control method described above.

[0039] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects:

[0040] This invention proposes a charging control method, device, system, and storage medium. The method involves acquiring the charging demand and total allowable charging time of a target battery, predicting the required charging time based on the charging demand using a preset charging estimation rule, and obtaining an estimated charging time. When the estimated charging time is less than the total allowable charging time, a target charging period is determined based on the estimated charging time, the total allowable charging time, and a preset electricity consumption period distribution table. A target charging current is then determined based on the maximum allowable charging current of the target battery and the estimated charging current obtained from the charging demand and the estimated charging time. Finally, the target battery is charged according to the target charging current within the target charging period. This invention employs a preset electricity consumption time distribution table, which integrates factors such as electricity price and peak / valley electricity consumption into the charging control. It takes into account the differences in charging parameters at different times, enabling more economical charging control. Furthermore, it redefines the actual charging current instead of directly using the charging device's output current or the target battery's maximum allowable charging current. This allows for improved battery life and charging safety while maintaining economic efficiency. Moreover, subsequent steps are only executed when the estimated charging time is less than the total allowable charging time, satisfying users' needs for limiting charging time and preventing situations where the battery is still charging when the user wants to use it, thus improving the user experience. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a flowchart illustrating the first embodiment of the charging control method of the present invention;

[0043] Figure 2 This is a schematic diagram of the hardware structure of the charging control device involved in the present invention;

[0044] Figure 3 This is a schematic diagram of the time period distribution in Example 1 of the second embodiment of the charging control method of the present invention;

[0045] Figure 4 This is a schematic diagram of the time period distribution in Example 2 of the second embodiment of the charging control method of the present invention;

[0046] Figure 5 This is a schematic diagram of the time period distribution in Example 3 of the second embodiment of the charging control method of the present invention;

[0047] Figure 6This is a schematic diagram of the time period distribution in Example 4 of the second embodiment of the charging control method of the present invention;

[0048] Figure 7 This is a functional module diagram of the first embodiment of the charging control system of the present invention.

[0049] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0051] It should be noted that in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. In this invention, unless otherwise expressly specified and limited, the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this is based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] In view of the technical problem that existing charging control methods fail to take into account the influence of charging parameters, thus affecting user experience, this invention provides a charging control method, the overall idea of ​​which is as follows:

[0053] Obtain the target battery's charging requirement and total allowed charging time; based on the charging requirement, predict the required charging time using preset charging estimation rules to obtain the estimated charging time; when the estimated charging time is less than the total allowed charging time, determine the target charging period based on the estimated charging time, the total allowed charging time, and a preset electricity consumption period distribution table; determine the target charging current based on the target battery's maximum allowed charging current and the estimated charging current, where the estimated charging current is obtained from the charging requirement and the estimated charging time; within the target charging period, charge the target battery according to the target charging current.

[0054] The above technical solution charges the target battery. It employs a preset electricity consumption time distribution table, incorporating factors such as electricity price and peak / valley usage into the charging control. This takes into account the differences in charging parameters at different times, enabling more economical charging control. Furthermore, it redefines the actual charging current, rather than directly using the charging equipment's output current or the target battery's maximum allowable charging current. This balances economy with reduced charging current, improving battery life and charging safety. Finally, it only executes subsequent steps when the estimated charging time is less than the total allowable charging time, meeting users' needs for charging time constraints and preventing situations where the battery is still charging when the user needs it, thus improving the user experience.

[0055] The charging control method, device, system, and storage medium provided by the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments and implementation methods.

[0056] Example 1

[0057] Reference Figure 1 The flowchart illustrates the first embodiment of the charging control method of the present invention, which is applied to a charging control device.

[0058] Charging control equipment refers to terminal equipment or controllers that can realize data acquisition and signal transmission. For example, charging control equipment can be a charging device, an embedded edge device connected to the charging device, or a processor / controller connected to a charging pile, an on-board charger (OBC) connected to the vehicle's power battery, a vehicle control unit (VCU) connected to the vehicle's power battery, or a battery management system (BMS) connected to the battery.

[0059] like Figure 2The diagram shown is a schematic of the hardware structure of a charging control device. The charging control device may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.

[0060] Specifically, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 is used to connect to the client and communicate data with the client, and the user interface 1003 may include an output unit and an input unit; the network interface 1004 is used to connect to the backend server and communicate data with the backend server, and the network interface 1004 may include an input / output interface; the memory 1005 is used to store various types of data, such as instructions for any application or method in the charging control device, as well as application-related data, and the memory 1005 may be built-in memory; optionally, the memory 1005 may also be a storage device independent of the processor 1001, and so on. Figure 2 The memory 1005 may include an operating system, a network communication module, a user interface module, and a charging control program; the processor 1001 is used to call the charging control program stored in the memory 1005 and perform the following operations:

[0061] Obtain the target battery's charging requirements and total allowed charging time;

[0062] Based on the charging demand, the estimated charging time is predicted using preset charging estimation rules.

[0063] When the estimated charging time is less than the total allowed charging time, the target charging time period is determined based on the estimated charging time, the total allowed charging time, and the preset electricity consumption time distribution table.

[0064] The target charging current is determined based on the maximum allowable charging current and the estimated charging current of the target battery. The estimated charging current is obtained based on the charging demand and the estimated charging time.

[0065] During the target charging period, the target battery is charged according to the target charging current.

[0066] Based on the above-mentioned charging control equipment, the following is combined with Figure 1 The flowchart shown illustrates the charging control method of this embodiment in detail. The method may include the following steps:

[0067] Step S100: Obtain the target battery's charging requirement and total allowed charging time.

[0068] Specifically, this charging control method can be applied to the charging scenario of electric vehicle power batteries. The charging control method is activated by inserting the electric vehicle's charging cable into the charging station, at which point the power battery becomes the target battery. The charging demand can be determined based on the target battery's capacity, and the total allowed charging time can be set by the user. For example, when the user inserts the charging cable into the charging station, this can be set through the user interface of the charging control device. Specifically, the total allowed charging time can be set directly, or the charging end time can be set directly, allowing the charging control device to calculate the total allowed charging time based on the current time when the charging cable is inserted into the charging station and the charging end time.

[0069] Step S200: Based on the charging demand, predict the charging time required using preset charging estimation rules to obtain the estimated charging time.

[0070] Specifically, the charging prediction rule can be a functional relationship, based on relevant battery parameters such as battery temperature, to predict the charging time based on dynamically changing battery parameters. In other words, the estimated charging time can also change dynamically over time. After acquiring the charging demand, the charging control device can input the demand into the charging prediction rule to predict the total charging time required for the entire process based on the current moment.

[0071] Step S300: When the estimated charging time is less than the total allowed charging time, determine the target charging time period based on the estimated charging time, the total allowed charging time, and the preset electricity consumption time distribution table.

[0072] Specifically, the estimated charging time is predicted by the charging control device based on the charging demand of the target battery. Within this time, the amount of charging performed on the target battery will not differ significantly from the charging demand, and the actual needs of the target battery can be taken into account. However, the total allowed charging time is set by the user and may be longer or shorter than the predicted estimated charging time.

[0073] When the total allowed charging time is less than the estimated charging time, it means the battery may not be fully charged by the time the user sets it. In this case, to meet the user's needs, the default charging method can be used to charge the target battery immediately, such as selecting the default fast or slow charging method, and charging as quickly as possible. When the total allowed charging time equals the estimated charging time, it means the battery may be fully charged by the time the user sets it using the default method. In this case, reducing the charging current or shortening the time may prevent the battery from being fully charged. Therefore, the default fast or slow charging method can also be selected to ensure that the required charging amount is achieved. When the total allowed charging time is greater than the estimated charging time, it means the user may not be in a hurry to use the electric vehicle. In this case, the impact of factors such as electricity prices on charging can be considered to achieve a more economical charging method. Therefore, when the estimated charging time is less than the total allowed charging time, the charging control device can determine the target charging period based on the estimated charging time, the total allowed charging time, and the preset electricity consumption period distribution table.

[0074] The distribution of electricity consumption periods can include the distribution of electricity consumption periods corresponding to different electricity prices. This can be obtained based on the electricity consumption data and electricity price data of different cities or regions. For example, a 24-hour day can be divided into multiple different electricity consumption periods, and the electricity price of each period can be different. For example, the period from sunrise to sunset can be set as a low-price period, and the period from sunset to sunrise can be set as a high-price period. Another example is to set a period of time as low-peak electricity consumption, a period of time as medium-peak electricity consumption, and the remaining time as high-peak electricity consumption. The specific settings can be set according to actual needs and are not limited here.

[0075] The charging control equipment can compare the distribution of electricity consumption periods and select periods with lower electricity prices or off-peak periods within the time period corresponding to the total allowable charging time. The time period that matches the estimated charging time can be used as the target charging period, which is also the time when the actual output current of the charging pile reaches the target battery.

[0076] Step S400: Determine the target charging current based on the maximum allowable charging current of the target battery and the estimated charging current, wherein the estimated charging current is obtained based on the charging demand and the estimated charging time.

[0077] Specifically, the target battery itself has charging current requirements. To ensure a rapid full charge, the required charging current is generally the battery's maximum allowable charging current. The charging control equipment can calculate an estimated charging current based on the target battery's charging needs and the predicted charging time. To ensure battery charging safety and prevent excessive current from damaging the battery and shortening its lifespan, a smaller charging current can be used while meeting the charging needs and reducing charging costs. Therefore, after determining the estimated charging current for the target battery, it can be compared with the target battery's maximum allowable charging current, and the smaller value can be determined as the target charging current, which is also the actual current output from the charging pile to the target battery.

[0078] Step S500: During the target charging period, charge the target battery according to the target charging current.

[0079] Specifically, after the charging control device determines the target charging period in step S300 and the target charging current in step S400, it can charge the target battery according to the target charging current when the target charging period arrives. When the charging control device is independent of charging piles or other charging equipment, it can control the charging pile to output a corresponding amount of output current according to the target charging current and transmit it to the target battery to achieve charging. When the charging control device is installed on the electric vehicle where the target battery is located, it can control the target battery to receive a corresponding amount of input current according to the target charging current to achieve charging; this is not limited here.

[0080] The charging control method provided in this embodiment obtains the charging demand and total allowed charging time of the target battery, predicts the required charging time based on the charging demand using a preset charging estimation rule, and obtains the estimated charging time. When the estimated charging time is less than the total allowed charging time, the target charging period is determined based on the estimated charging time, the total allowed charging time, and a preset electricity consumption period distribution table. The target charging current is determined based on the maximum allowed charging current of the target battery and the estimated charging current obtained from the charging demand and the estimated charging time. Finally, the target battery is charged according to the target charging current during the target charging period. This invention employs a preset electricity consumption time distribution table, which integrates factors such as electricity price and peak / valley electricity consumption into the charging control. It takes into account the differences in charging parameters at different times, enabling more economical charging control. Furthermore, it redefines the actual charging current instead of directly using the charging device's output current or the target battery's maximum allowable charging current. This allows for improved battery life and charging safety while maintaining economic efficiency. Moreover, subsequent steps are only executed when the estimated charging time is less than the total allowable charging time, satisfying users' needs for limiting charging time and preventing situations where the battery is still charging when the user wants to use it, thus improving the user experience.

[0081] Example 2

[0082] Based on the same inventive concept, a second embodiment of the charging control method of the present invention is proposed, which is applied to a charging control device. The charging control method of this embodiment is described in detail below. The method may include the following steps:

[0083] Step S100: Obtain the target battery's charging requirement and total allowed charging time.

[0084] In this embodiment, the target battery is the power battery of an electric vehicle, the charging control device is the on-board charger connected to the power battery, and the charging device for charging the target battery is the charging pile.

[0085] Further, step S100 may include:

[0086] Step S110: Based on the current charge level and target charge level of the target battery, obtain the charging requirement;

[0087] Step S120: Calculate the total allowed charging time based on the charging start time and the user-set charging end time.

[0088] Specifically, the target charge level is the charge level that the vehicle controller (VCU) wants the power battery to reach when charging the electric vehicle. Since a maximum charging limit is sometimes set for the power battery, it may not be fully charged. Therefore, the target charge level can be the total capacity of the target battery or a preset percentage of that total capacity. For example, if the total capacity of the target battery is 100 kWh, the target charge level can be 100 kWh. If the maximum charging limit is 90%, the target charge level can be 90 kWh. This embodiment uses a target charge level of 90 kWh as an example, and assumes the current charge level of the target battery is 30 kWh. In this embodiment, the charging control device can determine that the target battery's charging requirement is 60 kWh.

[0089] Specifically, the charging start time can be the time the user inserts the electric vehicle's charging plug into the charging station, i.e., the current time, or it can be a user-set charging start time; there is no limitation here. The charging end time can generally be set by the user, optionally, setting the charging end time for each charging session. For example, if the user wants to use the vehicle at 7:00 AM tomorrow, the charging end time would be 7:00 AM the following day. Then, based on the charging start and end times, the total allowed charging time can be calculated. For example, using the current time 8:00 PM as the charging start time, the total allowed charging time can be calculated to be 11 hours.

[0090] Step S200: Based on the charging demand, predict the charging time required using preset charging estimation rules to obtain the estimated charging time.

[0091] Further, step S200 may include:

[0092] Step S210: Obtain the real-time battery temperature of the target battery;

[0093] Step S220: Based on the real-time battery temperature and charging demand, predict the charging time required using a preset charging prediction rule to obtain the estimated charging time; wherein, the charging prediction rule is set based on the target battery temperature, charging capacity and charging time.

[0094] Specifically, the charging control device can first perform curve fitting based on multiple parameters such as the target battery temperature, charging amount, and charging time to obtain charging prediction rules, which are then stored in the charging control device. After obtaining the charging amount requirement, the device obtains the real-time battery temperature of the target battery, and then, based on the real-time battery temperature and charging amount requirement, calls the charging prediction rules to predict the charging time required, thus obtaining the estimated charging time.

[0095] In this embodiment, it is assumed that the target battery's parameters, such as battery temperature, charge amount, and charging time, as shown in Table 1 below, can be obtained through simulation calculations or experimental tests:

[0096] Table 1

[0097]

[0098] Table 1 above shows the charging time required for the target battery at different battery temperatures, in hours (h). The charging control device can perform curve fitting based on the data listed in Table 1 to obtain the charging prediction rule for this embodiment. In practical applications, the charging control device then acquires the real-time battery temperature of the target battery, and based on this real-time battery temperature and the charging demand, uses the charging prediction rule to predict the required charging time, thus obtaining the estimated charging time. For example, in this embodiment, based on a charging demand of 60 kWh, the estimated charging time is predicted to be 9 hours. The following explanation will use an estimated charging time of 9 hours as an example.

[0099] Step S300: When the estimated charging time is less than the total allowed charging time, determine the target charging time period based on the estimated charging time, the total allowed charging time, and the preset electricity consumption time distribution table.

[0100] Furthermore, when the estimated charging time is less than the total allowed charging time, step S300, "determining the target charging period based on the estimated charging time, the total allowed charging time, and the preset electricity consumption period distribution table," may include:

[0101] Step S310: Determine the allowed charging time period based on the total allowed charging time and the preset electricity consumption time distribution table; wherein, the electricity consumption time distribution table includes electricity consumption categories and their corresponding electricity prices and time periods, and the electricity consumption categories include off-peak periods, flat periods and peak-valley periods.

[0102] Specifically, when the estimated charging time is less than the total allowed charging time, the charging control equipment determines the allowed charging period based on the total allowed charging time and the corresponding electricity category and time period in the electricity consumption period distribution table.

[0103] In this embodiment, the estimated charging time of 9 hours is less than the total allowed charging time of 11 hours. The charging control device can determine the allowed charging time period based on the total allowed charging time of 11 hours and the electricity consumption time distribution table shown in Table 2.

[0104] Table 2

[0105] Electricity category Electricity price Time period trough 22.05 points / kWh 00:00-08:00 Peak and valley 98.63 points / kWh 10:00-12:00；14:00-19:00 flat section 58.02 points / kWh 08:00-10:00；12:00-14:00；19:00-00:00

[0106] Based on the time period distribution in Table 2 above, and the example in step S100 where the current time is 20:00, the charging end time is 7:00 the next day, and the total allowed charging time is 11 hours, we can conclude that the allowed charging periods in this case are: peak period 20:00-0:00, and off-peak period 0:00-7:00.

[0107] Step S320: Determine the target charging period according to the estimated charging duration and allowed charging time period, based on the priority of electricity consumption category; among which, the priority of off-peak period, flat period and peak-valley period decreases in that order.

[0108] Specifically, after determining the permitted charging period, the charging control equipment can further determine the final charging period based on the estimated charging duration and the priority relationship of different electricity consumption categories, thus obtaining the target charging period. To better utilize off-peak electricity consumption periods or periods with lower electricity prices for charging, priorities can be set for different electricity consumption categories involved in the electricity consumption period distribution table. For example, here the priority is set to decrease sequentially for off-peak periods, flat periods, and peak-valley periods.

[0109] In this embodiment, based on the estimated charging duration of 9 hours and the allowed charging time period obtained in step S310, when determining the target charging time period according to the priority of electricity consumption category, the off-peak period has the highest priority, followed by the flat period, and finally the peak-valley period. The corresponding target charging time period can be any 2 hours from the off-peak period of 0:00-7:00 (inclusive) and the flat period of 20:00-0:00, for example, set to 22:00-0:00 (inclusive). It can be seen that the target charging time period includes two periods, specifically the off-peak period of 0:00-7:00 and the flat period of 22:00-0:00, and the total duration of the two periods is the estimated charging duration of 9 hours. In this process, the off-peak period is utilized first, and the flat period is determined by using the off-peak period with lower electricity price. Therefore, the impact of electricity price is taken into account in the charging control process, making the electricity price lower for the same charging duration compared to existing charging schemes.

[0110] Step S400: Determine the target charging current based on the maximum allowable charging current of the target battery and the estimated charging current, wherein the estimated charging current is obtained based on the charging demand and the estimated charging time.

[0111] Furthermore, prior to step S400, the method may also include:

[0112] Step A1: Obtain the output voltage of the charging device that charges the target battery;

[0113] Step A2: Obtain the average charging power based on the charging demand and estimated charging time;

[0114] Step A3: Obtain the estimated charging current based on the average charging power and output voltage.

[0115] Specifically, the charging control device can be connected to the charging device to obtain the output voltage of the charging device, and obtain the average charging power based on the charging demand and the estimated charging time, thereby calculating the estimated charging current based on the output voltage of the charging device.

[0116] In this embodiment, the charging control device can calculate the average charging power based on the charging demand of 60kWh and the estimated charging time of 9 hours. Then, based on the output voltage of the charging device that charges the target battery, such as the charging pile in this embodiment, the estimated charging current can be calculated by dividing the average charging power by the output voltage.

[0117] In one embodiment, step S400 may include:

[0118] Step S410: Obtain the real-time battery temperature and real-time battery charge of the target battery;

[0119] Step S420: Based on the real-time battery temperature and real-time battery capacity, obtain the maximum allowable charging current of the target battery using a preset current limiting rule; wherein, the current limiting rule is set based on the target battery temperature, battery capacity, and charging current.

[0120] Step S430: Determine the minimum value between the maximum charging current and the estimated charging current as the target charging current.

[0121] Specifically, while calculating the estimated charging current, the charging control device can also obtain the real-time battery temperature and real-time battery charge of the target battery. Based on the real-time battery temperature and real-time battery charge, it can use preset current limiting rules to obtain the maximum allowable charging current of the target battery. Then, it compares the estimated charging current with the maximum charging current to determine the target charging current.

[0122] Optionally, before step S420, the charging control device can first perform curve fitting based on multiple parameters such as the target battery temperature, battery capacity, and charging current to obtain current limiting rules, which are then stored in the charging control device. In practical applications, after obtaining the real-time battery temperature and real-time battery capacity of the target battery, the current limiting rules are called based on these real-time battery temperature and real-time battery capacity to calculate the maximum allowable charging current for the target battery. This maximum charging current can also be dynamically changing based on the dynamic characteristics of the target battery temperature and battery capacity.

[0123] In this embodiment, it is assumed that the target battery's parameters, such as battery temperature, battery capacity, and charging current, can be obtained through simulation calculations or experimental tests, as shown in Table 3 below:

[0124] Table 3

[0125]

[0126] Table 3 above shows the maximum charging current of the target battery in this embodiment under different battery temperatures and battery capacities. The charging currents in the specific content of Table 3 are not directly represented current values, but rather proportional values ​​based on a rate C, where C represents the battery's charge / discharge capacity. For example, when the battery temperature is 10°C and the battery capacity is 20%, the charging current of the target battery is 1.2C. The charging control device can perform curve fitting based on the data listed in Table 3 to obtain the current limiting rules of this embodiment. Then, in practical applications, the charging control device acquires the real-time battery temperature and real-time battery capacity of the target battery, and then calculates the maximum allowable charging current of the target battery using the current limiting rules based on these real-time battery temperature and real-time battery capacity. In this embodiment, after obtaining the maximum allowable charging current of the target battery, the charging control device can determine the minimum value between the maximum charging current and the estimated charging current as the target charging current.

[0127] In another embodiment, step S430 may include:

[0128] Step S431: Obtain the maximum output current of the charging device that charges the target battery;

[0129] Step S432: Determine the minimum value among the maximum output current, maximum charging current, and estimated charging current as the target charging current.

[0130] Specifically, while calculating the maximum allowable charging current of the target battery, the charging control device can also collect the maximum output current of the charging device, such as the charging pile in this embodiment. Then, it compares the three parameters of maximum output current, maximum charging current, and estimated charging current, and determines the minimum value among them as the target charging current.

[0131] Compared to the aforementioned implementation method, this implementation method further considers the output current of the charging device, which can prevent the determined target charging current from exceeding the maximum output current of the charging device and improve the safety of the charging control process.

[0132] Step S500: During the target charging period, charge the target battery according to the target charging current.

[0133] Specifically, after the charging control device obtains the target charging current according to step S430 or step S432 and the target charging period according to step S320, it can start charging. Specifically, during the target charging period, the charging pile is controlled to output current to the target battery according to the magnitude corresponding to the target charging current, thereby realizing charging control.

[0134] It is understandable that after step S500, the charging control device can repeat the method to achieve dynamic charging control, or it can only execute the method when the charging cable is inserted into the charging pile, and then directly control the charging according to step S500 to reduce the memory usage of the charging control device. The specific choice can be made according to the actual situation.

[0135] In another embodiment of this example, after step S200, "predicting the required charging time based on the charging demand using a preset charging estimation rule, and obtaining the estimated charging time," the method may further include:

[0136] Step S600: When the estimated charging time is greater than or equal to the total allowed charging time, determine the target charging period based on the total allowed charging time;

[0137] Step S710: Determine the maximum allowable charging current of the target battery as the target charging current; or,

[0138] Step S720: Determine the minimum value between the maximum allowable charging current of the target battery and the maximum output current of the charging device charging the target battery as the target charging current;

[0139] The maximum allowable charging current for the target battery is obtained based on the real-time battery temperature and real-time battery capacity using preset current limiting rules.

[0140] Specifically, when the estimated charging time is greater than or equal to the total allowed charging time, the charging control device can directly determine the target charging period based on the total allowed charging time. There are two ways to determine the target charging current: one is to directly determine the maximum allowed charging current of the target battery as the target charging current; the other is to compare the maximum allowed charging current of the target battery with the maximum output current of the charging device, and determine the smaller value as the target charging current. It can be understood that the methods for obtaining the maximum allowed charging current of the target battery and the maximum output current of the charging device can be referred to the descriptions of the corresponding processes above, and will not be repeated here.

[0141] In this embodiment, when the estimated charging time of 9 hours is greater than the total allowed charging time, let's say it's 6 hours, and assuming the current time is 20:00, the target charging period can be determined as the peak period 20:00-0:00 and the off-peak period 0:00-2:00 based on the total allowed charging time of 6 hours. Then, the real-time battery temperature and real-time battery power of the target battery can be obtained. Based on the real-time battery temperature and real-time battery power, the maximum allowed charging current of the target battery is obtained using a preset current limiting rule, and the maximum allowed charging current of the target battery is directly determined as the target charging current. Alternatively, the maximum output current of the charging device, such as the charging pile in this embodiment, can be collected simultaneously, and then the maximum charging current and the maximum output current are compared, with the minimum value being determined as the target charging current.

[0142] To better illustrate the specific implementation method for determining the target charging period in this embodiment, the following description is provided in conjunction with specific examples.

[0143] Example 1:

[0144] like Figure 3 The time period distribution diagram shown assumes that the charging start time is 20:00, the user sets the charging end time to 7:00 the next day, the total allowed charging time is 11 hours, and the estimated charging time is 9 hours.

[0145] At this time, the estimated charging time of 9 hours is less than the total allowed charging time of 11 hours. Based on the electricity consumption period distribution table in Table 2, the corresponding electricity consumption periods are: peak period 19:00-0:00 and off-peak period 0:00-8:00.

[0146] By executing step S310, the allowed charging time period can be determined as: peak period 20:00-0:00, off-peak period 0:00-7:00, totaling 11 hours;

[0147] Executing step S320 again, the target charging period for this example can be determined as: peak period 22:00-0:00, off-peak period 0:00-7:00, totaling 9 hours.

[0148] Example 2:

[0149] like Figure 4 The time period distribution diagram shown assumes that the charging start time is 9:00, the user sets the charging end time to 20:00 on the same day, the total allowed charging time is 11 hours, and the estimated charging time is 9 hours.

[0150] At this time, the estimated charging time of 9 hours is less than the total allowed charging time of 11 hours. Based on the electricity consumption period distribution table in Table 2, the corresponding electricity consumption periods are: flat period 8:00-10:00, peak-valley period 10:00-12:00, flat period 12:00-14:00, peak-valley period 14:00-19:00, flat period 19:00-0:00.

[0151] By executing step S310, the permitted charging periods can be determined as follows: flat periods 9:00-10:00, 12:00-14:00, 19:00-20:00, and peak-valley periods 10:00-12:00, 14:00-19:00, totaling 11 hours;

[0152] Executing step S320 again, the target charging time period for this example can be determined as: flat period 9:00-10:00, 12:00-14:00, 19:00-20:00, and peak-valley period 10:00-12:00, 14:00-17:00, totaling 9 hours.

[0153] Example 3:

[0154] like Figure 5 The time period distribution diagram shown assumes that the charging start time is 15:00, the user sets the charging end time to 2:00 the next day, the total allowed charging time is 11 hours, and the estimated charging time is 9 hours.

[0155] At this time, the estimated charging time of 9 hours is less than the total allowed charging time of 11 hours. Based on the electricity consumption period distribution table in Table 2, the corresponding electricity consumption periods are: peak and valley 14:00-19:00, flat period 19:00-0:00, and valley 0:00-8:00.

[0156] By executing step S310, the permitted charging periods can be determined as follows: off-peak 0:00-2:00, flat period 19:00-0:00, and peak-valley 15:00-19:00, totaling 11 hours.

[0157] Executing step S320 again, the target charging period for this example can be determined as: off-peak 0:00-2:00, flat 19:00-0:00, peak-valley 15:00-17:00, totaling 9 hours.

[0158] Example 4:

[0159] like Figure 6 The time period distribution diagram shown assumes that the charging start time is 20:00, the user sets the charging end time to 2:00 the next day, the total allowed charging time is 6 hours, and the estimated charging time is 9 hours.

[0160] At this time, the estimated charging time of 6 hours is greater than the total allowed charging time of 11 hours. Based on the electricity consumption period distribution table in Table 2, the corresponding electricity consumption periods are: peak period 19:00-0:00 and off-peak period 0:00-8:00.

[0161] By executing step S600, the target charging period for this example can be determined as: off-peak 0:00-2:00 and peak 20:00-0:00, for a total of 6 hours.

[0162] It should be noted that electric vehicle charging modes can currently be divided into fast charging and slow charging. In fast charging mode, the charging time at normal temperature is approximately 30 minutes, and the output frequency of the charging pile is approximately 100kW. In slow charging mode, the charging time at normal temperature is approximately 5-12 hours, and the output frequency of the charging pile or the power of the on-board charger generally includes 6.6kW, 3.3kW, 1.6kW, etc. The method in this embodiment can be applied to both fast and slow charging, depending on the actual parameters adjusted. To better reflect the advantages of charging during periods of low electricity prices, it is generally applied to slow charging mode.

[0163] For more details on the specific implementation of the above method steps, please refer to the description of the specific implementation in Example 1. For the sake of brevity, these details will not be repeated here.

[0164] The charging control method provided in this embodiment takes into account the differences in electricity prices at different times by adding an electricity consumption time distribution table based on electricity price time periods. This makes the charging control take into account electricity prices, reduces charging costs, and achieves the most economical charging. Furthermore, by comparing multiple current parameters and selecting the minimum value as the target charging current, the charging current can be reduced while meeting the total allowable charging time, thereby improving battery life and charging safety.

[0165] Example 3

[0166] Based on the same inventive concept, referring to Figure 2 The hardware structure diagram shows that this embodiment provides a charging control device, which may include a processor and a memory. The memory stores a charging control program. When the charging control program is executed by the processor, it implements all or part of the steps of the various embodiments of the charging control method of the present invention.

[0167] Specifically, charging control equipment refers to terminal equipment or controllers that can achieve data acquisition and signal transmission.

[0168] It is understandable that charging control devices may also include communication buses, user interfaces, and network interfaces. The communication bus is used to connect and communicate between these components; the user interface is used to connect to the client and communicate data with the client. The user interface may include output units such as a display screen and speakers, and input units such as a keyboard and microphone; the network interface is used to connect to the backend server and communicate data with the backend server. The network interface may include input / output interfaces, such as standard wired interfaces and wireless interfaces such as Wi-Fi interfaces; the memory is used to store various types of data. This data may include, for example, instructions for any application or method in the charging control device, as well as application-related data. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Random Access Memory (RAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), and Read-Only Memory (ROM). The memory can be a memory (ROM), magnetic storage, flash memory, disk, or optical disk, etc.; optionally, the memory can also be a storage device independent of the processor; the processor is used to call the charging control program stored in the memory and execute the charging control method as described above. The processor can be an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, used to execute all or part of the steps of the various embodiments of the charging control method described above.

[0169] It needs to be explained that, Figure 2The hardware structure shown does not constitute a limitation on the charging control device of the present invention. It may include more or fewer components than shown, or combine certain components, or have different component arrangements. The functions and corresponding technical effects achieved by the charging control device provided in this embodiment can be referred to the description of the specific implementation methods in the various embodiments of the charging control method of the present invention. For the sake of brevity, they will not be repeated here.

[0170] Example 4

[0171] Based on the same inventive concept, referring to Figure 7 The present invention provides a first embodiment of a charging control system, which may include:

[0172] Charging equipment;

[0173] Target battery;

[0174] Charging control equipment;

[0175] The target battery can be connected to the charging device, and the charging control device can be connected to both the charging device and the target battery.

[0176] Specifically, charging control equipment can be terminal devices such as charging equipment, embedded edge devices connected to charging equipment, or processors / controllers connected to charging piles, OBCs connected to the vehicle's power battery, VCUs connected to the vehicle's power battery, BMSs connected to the battery, and other control devices or system components.

[0177] It should be noted that the functions and corresponding technical effects of the charging control device in the charging control system provided in this embodiment can be referred to the description of the specific implementation method in the embodiment of the charging control device of the present invention. For the sake of brevity, they will not be repeated here.

[0178] Example 5

[0179] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic memory, disk, optical disk, server, etc. The storage medium stores a computer program, which can be executed by one or more processors. When the computer program is executed by the processor, it can implement all or part of the steps of the various embodiments of the charging control method of the present invention.

[0180] It should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made under the inventive concept of the present invention using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are all included within the patent protection scope of the present invention.

Claims

1. A charging control method, characterized in that, The method includes: Obtain the target battery's charging requirements and total allowed charging time; Based on the charging demand, the charging time required is predicted using a preset charging estimation rule to obtain the estimated charging time. When the estimated charging time is less than the total allowed charging time, the target charging time period is determined based on the estimated charging time, the total allowed charging time, and the preset electricity consumption time distribution table. The target charging current is determined based on the maximum allowable charging current and the estimated charging current of the target battery, wherein the estimated charging current is obtained based on the charging amount requirement and the estimated charging time. During the target charging period, the target battery is charged according to the target charging current; The step of predicting the charging time based on the charging demand using a preset charging estimation rule to obtain the estimated charging time includes: Obtain the real-time battery temperature of the target battery; Based on the real-time battery temperature and the charging requirement, the estimated charging time is predicted using a preset charging prediction rule; wherein the charging prediction rule is set based on the target battery temperature, charging quantity, and charging time.

2. The charging control method as described in claim 1, characterized in that, The steps for obtaining the target battery's charging requirements and total allowed charging time include: The charging requirement is obtained based on the current charge level and the target charge level of the target battery. The total allowed charging time is obtained based on the charging start time and the user-set charging end time.

3. The charging control method as described in claim 1, characterized in that, The step of determining the target charging period based on the estimated charging time, the total allowed charging time, and the preset electricity consumption period distribution table includes: Based on the total allowed charging time and the preset electricity consumption time distribution table, the allowed charging time period is determined; wherein, the electricity consumption time distribution table includes electricity consumption categories and their corresponding electricity prices and time periods, and the electricity consumption categories include off-peak periods, flat periods and peak-valley periods; Based on the estimated charging duration and the permitted charging period, the target charging period is determined according to the priority of the electricity consumption category; wherein the priority of the off-peak period, the flat period, and the peak-valley period decreases in that order.

4. The charging control method as described in claim 1, characterized in that, The step of determining the target charging current based on the maximum allowable charging current and the estimated charging current of the target battery includes: Obtain the real-time battery temperature and real-time battery charge of the target battery; Based on the real-time battery temperature and the real-time battery charge, the maximum allowable charging current for the target battery is obtained using a preset current limiting rule; wherein, the current limiting rule is set based on the battery temperature, battery charge, and charging current of the target battery. The minimum value between the maximum charging current and the estimated charging current is determined as the target charging current.

5. The charging control method as described in claim 4, characterized in that, The step of determining the minimum value between the maximum charging current and the estimated charging current as the target charging current includes: Obtain the maximum output current of the charging device that charges the target battery; The minimum value among the maximum output current, the maximum charging current, and the estimated charging current is determined as the target charging current.

6. The charging control method as described in claim 1, characterized in that, After the step of predicting the required charging time based on the charging demand using a preset charging estimation rule to obtain the estimated charging time, the method further includes: When the estimated charging time is greater than or equal to the total allowed charging time, the target charging period is determined based on the total allowed charging time. The target charging current is determined as the maximum allowable charging current of the target battery; or... The target charging current is determined by the minimum value between the maximum allowable charging current of the target battery and the maximum output current of the charging device that charges the target battery. The maximum allowable charging current of the target battery is obtained based on the real-time battery temperature and real-time battery charge, using a preset current limiting rule.

7. A charging control device, characterized in that, The charging control device includes a processor and a memory, wherein the memory stores a charging control program, and when the charging control program is executed by the processor, it implements the charging control method as described in any one of claims 1 to 6.

8. A charging control system, characterized in that, The system includes: Charging equipment; Target battery; The charging control device as described in claim 7; The target battery is connected to the charging device, and the charging control device is connected to both the charging device and the target battery.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by one or more processors, implements the charging control method as described in any one of claims 1 to 6.

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