Charging method, device and equipment of electric vehicle, vehicle and storage medium

Abstract

The invention discloses a charging method, device and equipment of an electric vehicle, the vehicle and a storage medium. The scheme comprises the following steps: receiving a reservation charging instruction for a target vehicle, wherein the reservation charging instruction is used for indicating the target vehicle to complete charging by using a direct current charging pile before a specified moment; the available charging time period between the instruction issuing time and the specified moment comprises a first time period and a second time period after the first time period; resources required by unit electric quantity during charging of the target vehicle in the first time period are higher than resources required by unit electric quantity during the second time period; charging a power battery at the target vehicle in a first mode within at least part of time within the first time period; charging the power battery in a second mode in at least part of time in the second time period; wherein under the condition that the states of the power batteries are the same, the first charging power in the first mode is smaller than the second charging power in the second mode. Therefore, direct-current reserved charging can be realized on the premise of not changing the hardware of the existing direct-current charging pile.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, specifically to a charging method, device, equipment, vehicle, and storage medium for electric vehicles. Background Technology

[0002] Peak-valley time-of-use pricing is a billing mechanism that regulates electricity supply and demand through price levers. It divides the day into peak, normal, and off-peak periods, applying differentiated prices to each period. Prices are higher during peak hours, followed by normal hours, and lowest during off-peak hours.

[0003] Against this backdrop, electric vehicle users can schedule their charging during off-peak hours at night using the pre-charge function. This not only significantly reduces users' electricity costs but also helps balance the grid load, alleviate peak load pressure, absorb surplus renewable energy at night, achieve peak shaving and valley filling for the grid, and improve the overall stability and economy of the power system.

[0004] Due to limitations in technical implementation, historical equipment deployment cycles, and lagging support for relevant standards and protocols, the vast majority of DC charging piles currently installed and in operation on the market do not support scheduled charging functionality. This makes it difficult for electric vehicle users who rely on DC fast charging to take advantage of peak-valley electricity pricing policies to save on charging costs, and also limits the possibility of the power grid using DC fast charging load for more refined scheduling. Summary of the Invention

[0005] In view of this, this application aims to provide a charging method, device, equipment, vehicle and storage medium for electric vehicles, which can realize DC scheduled charging without changing the existing DC charging pile hardware.

[0006] According to a first aspect of this application, a method for charging an electric vehicle is provided, comprising:

[0007] The system receives a scheduled charging instruction for a target vehicle, which instructs the target vehicle to complete charging using a DC charging pile before a specified time. The available charging period between the instruction issuance time and the specified time includes a first period and a second period following the first period. The resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period.

[0008] During at least a portion of the first time period, the DC charging pile is used to charge the power battery of the target vehicle in a first mode.

[0009] During at least a portion of the second time period, the power battery is charged using the DC charging pile in a second mode; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

[0010] Optionally, the step of charging the power battery of the target vehicle using the DC charging pile in a first mode includes:

[0011] The first charging power of the power battery in the first mode is determined based on the rated minimum current and / or rated minimum voltage of the DC charging pile; the first charging power is the minimum charging power of the DC charging pile.

[0012] The power battery is charged using the DC charging pile at the first charging power.

[0013] Optionally, the scheduled charging instruction may further include a target state of charge; the target state of charge is used to represent the expected state of charge of the power battery at the specified time.

[0014] The method of charging the power battery of the target vehicle using the DC charging pile in a first mode includes:

[0015] Based on the duration of the second time period, determine the first expected charging amount within the second time period;

[0016] The second expected charging amount within the first time period is calculated based on the first expected charging amount, the target state of charge, and the current state of charge of the power battery.

[0017] Based on the second desired charging amount and the duration of the first time period, calculate the first charging power of the power battery in the first mode;

[0018] The power battery is charged using the DC charging pile at the first charging power.

[0019] Optionally, the scheduled charging instruction further includes target state of charge and charging strategy information; the target state of charge is used to represent the expected state of charge of the power battery at the specified time; the method further includes:

[0020] If the specified time is reached at the current time, determine whether the current state of charge of the power battery has reached the target state of charge;

[0021] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates that power is prioritized, the DC charging pile will continue to charge the power battery.

[0022] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates time priority, charging of the power battery shall be stopped.

[0023] Optionally, charging the power battery in a second mode using the DC charging pile for at least a portion of the second time period includes:

[0024] The current state information of the power battery and the maximum charging power of the DC charging pile are obtained; the state information includes at least the state of charge information indicating the current state of charge of the power battery.

[0025] Based on the status information, determine the maximum allowable charging power of the power battery at the current moment;

[0026] Based on the maximum allowable charging power and the maximum charging power, the second charging power of the power battery in the second mode is determined;

[0027] The power battery is charged using the DC charging pile at the second charging power.

[0028] Optionally, the first time period includes the peak period and / or normal period of the power supply system's power load; correspondingly, the second time period includes the off-peak period of the power supply system's power load.

[0029] Optionally, the first time period includes the peak period of the power supply system's electrical load; correspondingly, the second time period includes the off-peak period and / or normal period of the power supply system's electrical load.

[0030] According to a second aspect of this application, a charging device for an electric vehicle is provided, comprising:

[0031] The receiving module is used to receive a scheduled charging instruction for a target vehicle, which instructs the target vehicle to complete charging using a DC charging pile before a specified time. The available charging period between the instruction issuance time and the specified time includes a first period and a second period following the first period. The resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period.

[0032] A charging module is configured to charge the power battery of the target vehicle using the DC charging pile in a first mode for at least a portion of a first time period; and to charge the power battery using the DC charging pile in a second mode for at least a portion of a second time period; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

[0033] According to a third aspect of this application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; the processor being configured to perform the method described in any of the above embodiments.

[0034] According to a third aspect of this application, a vehicle is provided, including the aforementioned electronic equipment.

[0035] According to a fifth aspect of this application, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the methods described in any of the above embodiments.

[0036] This application provides a charging method, apparatus, device, vehicle, and storage medium for electric vehicles. The solution includes: limiting the charging power of electric vehicles during peak or normal periods, and lifting the limitation on charging power during off-peak periods. This enables DC scheduled charging without altering existing charging pile hardware, increases the proportion of electricity consumption during off-peak periods, and reduces user charging costs. Attached Figure Description

[0037] Figure 1 The diagram shown is a schematic representation of an implementation environment provided in an embodiment of this application.

[0038] Figure 2 The diagram shown is a schematic flowchart of a charging method for an electric vehicle provided in one embodiment of this application.

[0039] Figure 3 The diagram shown is a block diagram of a charging device for an electric vehicle according to an embodiment of this application.

[0040] Figure 4 The diagram shown is a structural block diagram of an electronic device provided in one embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Application Overview

[0043] With the increasing popularity of electric vehicles and users' growing demands for convenience and affordability, charging facilities with scheduled charging functions are gaining popularity. While some DC charging stations on the market already support scheduled charging, their implementation has significant limitations. These stations rely on specific controllable hardware switches to precisely manage the vehicle's state switching: before the scheduled time arrives, the vehicle needs to remain in sleep mode to conserve power; at the scheduled time, the vehicle needs to be precisely woken up to start charging.

[0044] However, many existing DC charging stations on the market are not equipped with such controllable switch hardware. These existing DC charging stations are typically designed for plug-and-charge functionality and lack the ability to actively wake up dormant vehicles. Due to the lack of this crucial hardware interface, the charging station cannot actively send the necessary wake-up signal to the vehicle at the user-set scheduled time, leaving the vehicle in a dormant state and preventing the scheduled charging command from being triggered. This directly results in existing DC charging stations not supporting scheduled charging, preventing users from taking advantage of electricity price discounts and limiting the grid's ability to balance electricity load.

[0045] Against this backdrop, developing a reservation charging solution that requires no modification to existing hardware and is compatible with existing DC charging piles has become a critical issue that the industry urgently needs to address.

[0046] Studies have shown that although the DC charging piles currently deployed do not yet integrate DC scheduled charging function modules, they all have the ability to dynamically adjust charging current and voltage, thereby achieving precise control of charging power.

[0047] To address the aforementioned issues, embodiments of this application limit the charging power of electric vehicles during peak or normal hours, and remove the restriction during off-peak hours. This enables DC scheduled charging without altering existing charging pile hardware, increases the proportion of energy consumed during off-peak hours, and reduces charging costs for users.

[0048] After introducing the basic principles of this application, various non-limiting embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] Exemplary System

[0050] Figure 1 The diagram shown is a schematic representation of an implementation environment provided in an embodiment of this application. This implementation environment may include an electric vehicle and a DC charging station; the electric vehicle and the DC charging station can be physically connected via a charging gun to achieve communication and high-voltage connection.

[0051] Electric vehicles may include an onboard system, a vehicle control unit (VCU), a battery management system (BMS), a power battery, and a telematics box (TBOX). The various components of an electric vehicle can communicate with each other via a CAN bus.

[0052] The onboard remote communication unit of an electric vehicle can connect to a cloud platform; the electric vehicle can receive commands issued by the user through a mobile vehicle control program via the cloud platform, such as a scheduled charging command. The electric vehicle can also obtain peak and off-peak electricity information via the cloud platform, such as peak hours, normal hours, and off-peak hours.

[0053] After receiving the scheduled charging command, the Vehicle Control Unit (VCU) sends control commands to the Battery Management System (BMS), which may include peak and off-peak electricity information. The BMS can interact with the DC charging station and adjust the charging current and voltage based on the peak and off-peak electricity information to achieve charging power control at different times.

[0054] Exemplary methods

[0055] Figure 2 This is a schematic flowchart of a charging method for an electric vehicle provided in one embodiment of this application. Figure 2 The method described is executed by a computing device in the electric vehicle, but this application embodiment is not limited thereto. The computing device may be a vehicle control unit (VCU), a battery management system (BMS), etc., and this application embodiment does not limit it to this.

[0056] like Figure 2 As shown, the method includes the following:

[0057] Step S210: Receive a scheduled charging instruction for the target vehicle, the scheduled charging instruction being used to instruct the target vehicle to complete charging using a DC charging pile before a specified time; the available charging period between the instruction issuance time of the scheduled charging instruction and the specified time includes a first period and a second period following the first period; the resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period.

[0058] In this application embodiment, the target vehicle may refer to a vehicle that needs to be charged, including pure electric vehicles and hybrid electric vehicles, without specific limitation.

[0059] In this embodiment of the application, the DC charging pile can refer to a charging device that has DC charging capability and can adjust charging parameters such as charging current, charging voltage, and charging power according to vehicle needs.

[0060] In this embodiment of the application, the scheduled charging instruction can refer to the charging time arrangement instruction set by the user, which can be issued through the vehicle control program or input through the human-machine interface (HMI) of the target vehicle.

[0061] In this embodiment of the application, the instruction issuance time may refer to the time when the user inputs the scheduled charging instruction through the vehicle control program or HMI, or the time when the target vehicle receives the scheduled charging instruction.

[0062] In this embodiment of the application, the specified time may refer to the charging end time set by the user.

[0063] In this embodiment of the application, the available charging period can refer to the period during which the vehicle can be charged, that is, the period from the time the instruction is issued to the specified time.

[0064] In this embodiment of the application, the resources required per unit of electricity may refer to the relevant costs or corresponding rights that the user needs to invest or consume when the target vehicle charges a unit of electricity (e.g., per kilowatt-hour); for example, the price (electricity price), points, credit limit, etc. required per unit of electricity.

[0065] In this embodiment of the application, the first time period may refer to a time period in which a relatively large amount of resources are required per unit of electricity, such as peak hours; the second time period may refer to a time period in which a relatively small amount of resources are required per unit of electricity, such as off-peak hours.

[0066] It should be noted that when the second time period is a low-lying period, the first time period can include both peak and normal times. Furthermore, the second time period can include both low-lying and normal times, meaning the first time period is a peak period.

[0067] In this embodiment of the application, the available charging period may further include multiple first time periods or multiple second time periods.

[0068] Step S220: During at least a portion of the first time period, the DC charging pile is used to charge the power battery of the target vehicle in a first mode.

[0069] In the embodiments of this application, the first mode may refer to an operating mode that limits the charging power. For example, during the charging process, there is a constant current charging stage, and the maximum charging current can be limited to a set threshold, which is lower than the maximum charging current value allowed by the power battery under the same state of charge.

[0070] Step S230: During at least a portion of the second time period, the power battery is charged using the DC charging pile in a second mode; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

[0071] In this embodiment, the second mode can refer to an operating mode without additional charging power limitations. For example, charging parameters are dynamically adjusted to achieve the optimal charging rate based on the rated output capacity of the DC charging pile and the maximum allowable charging current of the power battery at the target vehicle.

[0072] In this embodiment, the state of the power battery refers to its real-time operating state, which may include key parameters affecting charging power such as the battery's state of charge (SOC), battery temperature, state of health (SOH), and internal resistance. In practical applications, a constant current constant voltage (CC-CV) charging mode is commonly used. This involves first charging with a constant current until the battery voltage reaches a set threshold, and then charging with a constant voltage until the charging cutoff condition is met. The charging current and charging voltage of the power battery are dynamically adjusted according to changes in the state of charge. Generally, parameters such as charging current, charging voltage, and charging power are controlled in real-time based on the charging curve and the state of charge.

[0073] It is important to note that the charging power in the first mode is not always less than that in the second mode. For example, during the constant current charging phase, even if the charging current is limited using the first mode, the actual charging power may still be higher than that of the second mode at the end of the constant voltage charging phase.

[0074] In this embodiment, after receiving a scheduled charging instruction for a target vehicle, within the available charging time between the instruction issuance time and the specified time, a first time period with higher resource requirements per unit of electricity and a second time period with lower resource requirements per unit of electricity are determined. During the first time period, a first charging mode with lower charging power is used, while during the second time period, a second charging mode with higher charging power is used. This ensures that the target vehicle completes its charging requirement before the specified time without relying on additional controllable switching hardware in existing DC charging piles. Simultaneously, maximizing the use of the second time period with lower resource requirements per unit of electricity (such as off-peak hours) significantly increases the proportion of electricity consumption during off-peak hours, helping the power grid balance its load and reducing charging costs for users.

[0075] Finally, this solution does not require hardware modifications to existing DC charging stations. It can enable DC scheduled charging functionality on existing DC charging stations simply by adjusting software strategies, avoiding the additional investment required for hardware replacement and significantly reducing the upgrade cost of DC charging stations.

[0076] based on Figure 2 In addition to the method described in the embodiments of this specification, some specific implementation schemes of the method are also provided, which will be described below.

[0077] Optionally, the step of charging the power battery of the target vehicle using the DC charging pile in a first mode includes:

[0078] The first charging power of the power battery in the first mode is determined based on the rated minimum current and / or rated minimum voltage of the DC charging pile; the first charging power is the minimum charging power of the DC charging pile.

[0079] The power battery is charged using the DC charging pile at the first charging power.

[0080] In this embodiment of the application, the rated minimum current may refer to the lower limit of the current that the DC charging pile can sustainably operate under normal working conditions, that is, the minimum charging current of the DC charging pile.

[0081] In this embodiment of the application, the rated minimum voltage may refer to the lower limit of the voltage at which the direct-voltage charging pile can operate sustainably under normal working conditions, that is, the minimum charging voltage of the direct-voltage charging pile.

[0082] In this embodiment of the application, the first charging power may refer to the minimum charging power of the DC charging pile in the first mode, which can be calculated from the rated minimum current and the corresponding voltage value or the rated minimum voltage and the corresponding current value.

[0083] In this embodiment of the application, under the first mode, the electric vehicle can obtain the rated minimum current and rated minimum voltage of the DC charging pile through the battery management controller (BMS). Based on the battery status information such as the current state of charge, battery temperature, health status, and internal resistance of the power battery, the electric vehicle determines the voltage value corresponding to the rated minimum current. The rated minimum current and its corresponding voltage value are used as the current demand value and voltage demand value, and a request is sent to the DC charging pile to charge the power battery using the DC charging pile at the first charging power.

[0084] Of course, when the voltage value corresponding to the rated minimum current is less than the rated minimum voltage of the DC charging pile, the current value corresponding to the rated minimum voltage is used as the voltage demand value and the current demand value to initiate a request to the DC charging pile, thereby using the DC charging pile to charge the power battery with the first charging power.

[0085] In this embodiment of the application, the first mode may include an off-peak time priority mode; in the off-peak time priority mode, charging is performed at the minimum charging power allowed by the DC charging pile to maintain the charging state and avoid the electric vehicle from going into sleep mode and the DC charging pile from executing the end charging process.

[0086] In this embodiment, the power battery is charged at the minimum charging power of the DC charging pile during the first time period. This maintains a charging state with minimal energy consumption during the first time period, preventing the vehicle from entering sleep mode or triggering the DC charging pile to terminate the charging process. It also ensures that when the second time period arrives, the vehicle and charging pile can directly switch to the second charging mode, allowing the scheduled charging plan to be completed smoothly. Furthermore, this approach further reduces grid load during peak hours, makes better use of off-peak electricity prices, and further reduces charging costs.

[0087] Optionally, the scheduled charging instruction may further include a target state of charge; the target state of charge is used to represent the expected state of charge of the power battery at the specified time.

[0088] The method of charging the power battery of the target vehicle using the DC charging pile in a first mode includes:

[0089] Based on the duration of the second time period, determine the first expected charging amount within the second time period;

[0090] The second expected charging amount within the first time period is calculated based on the first expected charging amount, the target state of charge, and the current state of charge of the power battery.

[0091] Based on the second desired charging amount and the duration of the first time period, calculate the first charging power of the power battery in the first mode;

[0092] The power battery is charged using the DC charging pile at the first charging power.

[0093] In this embodiment of the application, the target state of charge may refer to the desired state of charge value set by the user, that is, the state of charge expected to be reached at the specified time.

[0094] In this embodiment, the first expected charging amount can refer to the amount of electricity expected to be charged into the battery during the second time period, that is, the maximum rechargeable amount that can be completed during the second time period. The first expected charging amount can be determined based on the charging curve of the power battery and the output capacity of the DC charging pile. The output capacity of the DC charging pile can be calculated based on parameters such as rated maximum power, rated maximum voltage, and rated continuous current. The rated continuous current can refer to the upper limit of the current that the DC charging pile can sustainably operate under normal working conditions.

[0095] In this embodiment, the second expected charging amount refers to the amount of battery power expected to be charged within a first time period, which can be calculated based on the first expected charging amount, the target state of charge, and the current state of charge of the power battery. Specifically, the second expected charging amount can be calculated by subtracting the current state of charge from the target state of charge and then subtracting the first expected charging amount.

[0096] In this embodiment, the first charging power may refer to the charging power value required within a first time period to achieve the second desired charging amount. The first charging power can be calculated based on the second desired charging amount and the duration of the first time period; specifically, the first charging power can be calculated based on the ratio of the second desired charging amount to the duration of the first time period.

[0097] In this embodiment of the application, the first mode may include a power priority mode, that is, in this mode, the battery is charged to the target state of charge first.

[0098] In this embodiment, to ensure that the target state of charge is reached at a specified time, a first charging power is accurately calculated and charging is performed at this power during a first time period, thereby achieving the target state of charge upon completion of charging. By reasonably allocating the charging amount between the first and second time periods, the reliable achievement of the charging target is ensured, and because the charging power of the first time period is accurately calculated based on the second expected charging amount, unnecessary resource consumption during that time period is avoided, thus minimizing charging costs while ensuring the user's charging needs are met.

[0099] Optionally, the scheduled charging instruction further includes target state of charge and charging strategy information; the target state of charge is used to represent the expected state of charge of the power battery at the specified time; the method further includes:

[0100] If the specified time is reached at the current time, determine whether the current state of charge of the power battery has reached the target state of charge;

[0101] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates that power is prioritized, the DC charging pile will continue to charge the power battery.

[0102] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates time priority, charging of the power battery shall be stopped.

[0103] In this embodiment of the application, the target state of charge may refer to the desired state of charge value set by the user, that is, the state of charge expected to be reached at the specified time.

[0104] In this embodiment, the charging strategy information is used to indicate whether to continue charging if the target state of charge is not reached at the specified time. The charging strategy information may include different strategies such as a low-peak time priority mode and a power priority mode. In the power priority mode, priority is given to ensuring the power battery reaches the target state of charge, without strict time restrictions. In the low-peak time priority mode, charging costs are considered first, and charging is stopped after the specified time to avoid entering periods of high electricity prices.

[0105] In this embodiment of the application, if the current state of charge has not reached the target state of charge when the specified time is reached, the power battery will continue to be charged if the charging strategy information indicates that power is prioritized, so as to ensure that the vehicle reaches the expected range and prioritize travel needs; if the charging strategy information indicates that time is prioritized, the power battery will be stopped in strict accordance with the preset time arrangement to avoid additional costs due to overtime charging.

[0106] Optionally, charging the power battery in a second mode using the DC charging pile for at least a portion of the second time period includes:

[0107] The current state information of the power battery and the maximum charging power of the DC charging pile are obtained; the state information includes at least the state of charge information indicating the current state of charge of the power battery.

[0108] Based on the status information, determine the maximum allowable charging power of the power battery at the current moment;

[0109] Based on the maximum allowable charging power and the maximum charging power, the second charging power of the power battery in the second mode is determined;

[0110] The power battery is charged using the DC charging pile at the second charging power.

[0111] In this embodiment of the application, the status information may include parameters reflecting the real-time operating status of the power battery; in addition to state of charge information, the status information may also include parameters such as the temperature, health status, and internal resistance of the power battery.

[0112] In this embodiment of the application, the maximum charging power may refer to the upper limit of the power that a DC charging pile can sustainably operate under normal working conditions.

[0113] In this embodiment of the application, the maximum allowable charging power may refer to the maximum safe charging power that the power battery can accept at the current moment, calculated based on the real-time status information of the power battery.

[0114] In this embodiment, the second charging power may refer to the charging power of the power battery in the second mode, and may be the smaller value between the maximum allowable charging power and the maximum charging power. If the second time period is sufficient, it may also be the ratio of the difference between the target state of charge and the current state of charge to the remaining duration of the second time period.

[0115] In this embodiment, the maximum allowable charging power of the power battery at the current moment is determined based on the battery's current state information; the second charging power of the power battery in the second mode is determined based on the maximum allowable charging power and the maximum charging power; and the power battery is charged using a DC charging pile at the second charging power. Thus, while ensuring the safety of power battery charging, the output capacity of the DC charging pile is fully utilized to achieve efficient charging in the second time period.

[0116] Optionally, the first time period includes the peak and / or normal periods of the power supply system's load; correspondingly, the second time period includes the off-peak periods of the power supply system's load.

[0117] Optionally, the first time period includes the peak period of the power supply system's electrical load; correspondingly, the second time period includes the off-peak period and / or normal period of the power supply system's electrical load.

[0118] In this embodiment of the application, the peak period can refer to the period when the power supply system has a high power load and a high electricity price.

[0119] In this embodiment of the application, the normal period can refer to a period when both the power load and the electricity price in the power supply system are at a moderate level.

[0120] In this embodiment of the application, the off-peak period can refer to a period when the power supply system has a low power load and a low electricity price.

[0121] In practical applications, peak hours are typically the concentrated period of electricity consumption during the day, while late night is considered off-peak, and the rest of the time is classified as normal hours. However, with the widespread adoption of photovoltaic (PV) power generation, some regions have added midday off-peak hours due to the demand for PV power, making the time period division more complex. Besides the typical scenario of reserving charging before the evening off-peak, there may be situations where available charging time simultaneously includes off-peak, normal, and peak hours. Therefore, based on actual electricity load and electricity price fluctuations, the normal hours can be flexibly configured as either the first or second time period, thereby improving the adaptability of the charging strategy and further reducing users' electricity costs.

[0122] If the available charging period includes peak hours, normal hours, and off-peak hours simultaneously, and at least one of a peak hour or a normal hour exists before the off-peak hour, then the maximum charging amount during the peak hour, normal hour, and off-peak hour can be calculated separately. Based on the calculation results, it is determined whether the off-peak hour is sufficient to allow the power battery to reach the target state of charge; if so, the period before the off-peak hour is taken as the first period, and the minimum charging power of the DC charging pile is taken as the first charging power in the first mode.

[0123] If the off-peak period is insufficient for the power battery to reach the target state of charge, it is further determined whether the normal and off-peak periods together enable the power battery to reach the target state of charge. If so, and at least one of the normal and off-peak periods exists after the peak period, the peak and normal periods are taken as the first period. The minimum charging power of the DC charging pile is used as the first charging power of the power battery during the peak period; the first charging power of the normal period is determined based on the target state of charge, the charging amount during the off-peak and peak periods, and the duration of the normal period; the charging power during the off-peak period is determined based on the maximum allowable charging power of the power battery and the maximum charging power of the DC charging pile.

[0124] If the peak and off-peak periods are insufficient to bring the battery to the target state of charge, then the peak period is designated as the first period, and the off-peak and neutral periods are designated as the second period. Based on the duration of the second period, a first expected charge amount is determined within the second period. Based on the first expected charge amount, the target state of charge, and the current state of charge of the battery, a second expected charge amount is calculated within the first period. Based on the second expected charge amount and the duration of the first period, a first charging power of the battery in the first mode is calculated. Based on the maximum allowable charging power of the battery and the maximum charging power of the DC charging pile, a second charging power is determined during the off-peak and neutral periods.

[0125] Some areas also have peak and / or off-peak periods. The priority of each period can be determined according to the resource requirements per unit of electricity, from lowest to highest (i.e., electricity price from lowest to highest): off-peak periods have the highest priority, followed by low-peak periods, normal periods, peak periods, and peak periods have the lowest priority. If the available charging periods include multiple types, the maximum charging capacity for each type is calculated, and the first and second periods are determined according to priority. Specifically: if the off-peak period is sufficient to bring the battery to the target state of charge, then the off-peak period is designated as the second period, and the period preceding the off-peak period is designated as the first period.

[0126] If the peak charging periods are insufficient, the maximum charging capacity for each time period type is accumulated from highest to lowest priority. The time periods where the accumulated value is still less than the target demand are designated as the second time period and charged in the second mode; the remaining time periods are designated as the first time period. The highest priority time period within the first time period is responsible for supplementing the remaining charging demand. For other time periods within the first time period besides the highest priority time period, the time periods preceding the second time period and the time periods preceding the highest priority time period within the first time period are designated as the first time period, and the minimum charging power of the DC charging pile is used as its corresponding first charging power.

[0127] Exemplary device

[0128] The apparatus embodiments of this application can be used to execute the method embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the method embodiments of this application.

[0129] Figure 3 The diagram shown is a block diagram of a charging device for an electric vehicle according to an embodiment of this application. Figure 3 As shown, the device 300 includes:

[0130] The receiving module 310 is used to receive a scheduled charging instruction for a target vehicle, which instructs the target vehicle to complete charging using a DC charging pile before a specified time. The available charging period between the instruction issuance time and the specified time includes a first period and a second period following the first period. The resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period.

[0131] The charging module 320 is configured to charge the power battery of the target vehicle in a first mode using the DC charging pile for at least a portion of a first time period; and to charge the power battery in a second mode using the DC charging pile for at least a portion of a second time period; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

[0132] Optionally, the charging module 320 is used for:

[0133] The first charging power of the power battery in the first mode is determined based on the rated minimum current and / or rated minimum voltage of the DC charging pile; the first charging power is the minimum charging power of the DC charging pile.

[0134] The power battery is charged using the DC charging pile at the first charging power.

[0135] Optionally, the scheduled charging instruction may further include a target state of charge; the target state of charge is used to represent the expected state of charge of the power battery at the specified time.

[0136] The charging module 320 is used for:

[0137] Based on the duration of the second time period, determine the first expected charging amount within the second time period;

[0138] The second expected charging amount within the first time period is calculated based on the first expected charging amount, the target state of charge, and the current state of charge of the power battery.

[0139] Based on the second desired charging amount and the duration of the first time period, calculate the first charging power of the power battery in the first mode;

[0140] The power battery is charged using the DC charging pile at the first charging power.

[0141] Optionally, the scheduled charging instruction may further include target state of charge and charging strategy information; the target state of charge is used to represent the expected state of charge of the power battery at the specified time.

[0142] The charging module 320 is used for:

[0143] If the specified time is reached at the current time, determine whether the current state of charge of the power battery has reached the target state of charge;

[0144] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates that power is prioritized, the DC charging pile will continue to charge the power battery.

[0145] If the current state of charge has not reached the target state of charge, and the charging strategy information indicates time priority, charging of the power battery shall be stopped.

[0146] Optionally, the charging module 320 is used for:

[0147] The current state information of the power battery and the maximum charging power of the DC charging pile are obtained; the state information includes at least the state of charge information indicating the current state of charge of the power battery.

[0148] Based on the status information, determine the maximum allowable charging power of the power battery at the current moment;

[0149] Based on the maximum allowable charging power and the maximum charging power, the second charging power of the power battery in the second mode is determined;

[0150] The power battery is charged using the DC charging pile at the second charging power.

[0151] Optionally, the first time period includes the peak and / or normal periods of the power supply system's load; correspondingly, the second time period includes the off-peak periods of the power supply system's load.

[0152] Optionally, the first time period includes the peak period of the power supply system's electrical load; correspondingly, the second time period includes the off-peak period and / or normal period of the power supply system's electrical load.

[0153] Exemplary electronic devices

[0154] Below, for reference Figure 4 This describes an electronic device according to embodiments of the present application. Figure 4 A block diagram of an electronic device according to an embodiment of this application is illustrated.

[0155] like Figure 4 As shown, the electronic device 400 includes one or more processors 410 and memory 420.

[0156] The processor 410 may be another form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 400 to perform desired functions.

[0157] Specifically, processor 410 can be a general-purpose processor, such as a general-purpose central processing unit (CPU), a microprocessor, etc., or an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present invention. It can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. Processor 410 may also include a main processor, and may also include a baseband chip, a modem, etc.

[0158] The memory 420 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 410 may execute the program instructions to implement the electric vehicle charging methods and / or other desired functions of the various embodiments of this application described above. Various contents, such as category correspondences, may also be stored in the computer-readable storage medium.

[0159] In one example, the electronic device 400 may also include an input device 430 and an output device 440, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0160] In addition, the input device 430 can also be a device that receives user input data and information, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, pedometer, or gravity sensor. The output device 440 can output various information to the outside. The output device 440 may include, for example, a display, speaker, printer, and communication networks and their connected remote output devices.

[0161] Of course, for the sake of simplicity, Figure 4 Only some of the components of the electronic device 400 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 400 may include any other suitable components depending on the specific application.

[0162] Exemplary vehicle

[0163] In addition to the methods and devices described above, embodiments of this application may also include a vehicle, comprising a vehicle body and the electronic equipment.

[0164] Exemplary computer program products and computer-readable storage media

[0165] In addition to the methods and apparatus described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the charging methods for electric vehicles according to various embodiments of this application as described in the "Exemplary Methods" section of this specification.

[0166] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0167] Furthermore, embodiments of this application may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps in the charging methods for electric vehicles according to various embodiments of this application described in the "Exemplary Methods" section above.

[0168] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0169] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0170] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0171] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For apparatus embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0172] The steps in the methods of the various embodiments of this application can be adjusted, merged, or deleted in order according to actual needs, and the technical features described in each embodiment can be replaced or combined.

[0173] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0174] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0175] The modules or submodules described as separate components may or may not be physically separate. The components that constitute a module or submodule may or may not be physical modules or submodules; that is, they may be located in one place or distributed across multiple network modules or submodules. Some or all of the modules or submodules can be selected to achieve the purpose of this embodiment's solution, depending on actual needs.

[0176] Furthermore, the functional modules or sub-modules in the various embodiments of this application can be integrated into one processing module, or each module or sub-module can exist physically separately, or two or more modules or sub-modules can be integrated into one module. The integrated modules or sub-modules described above can be implemented in hardware or in the form of software functional modules or sub-modules.

[0177] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0178] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software unit executed by a processor, or a combination of both. The software unit can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0179] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0180] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charging method for an electric vehicle, characterized in that, include: The system receives a scheduled charging instruction for a target vehicle, which instructs the target vehicle to complete charging using a DC charging pile before a specified time. The available charging period between the instruction issuance time and the specified time includes a first period and a second period following the first period. The resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period. During at least a portion of the first time period, the DC charging pile is used to charge the power battery of the target vehicle in a first mode. During at least a portion of the second time period, the power battery is charged using the DC charging pile in a second mode; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

2. The method according to claim 1, characterized in that, The method of charging the power battery of the target vehicle using the DC charging pile in a first mode includes: The first charging power of the power battery in the first mode is determined based on the rated minimum current and / or rated minimum voltage of the DC charging pile; the first charging power is the minimum charging power of the DC charging pile. The power battery is charged using the DC charging pile at the first charging power.

3. The method according to claim 1, characterized in that, The scheduled charging instruction also includes a target state of charge; the target state of charge is used to indicate the expected state of charge of the power battery at the specified time. The method of charging the power battery of the target vehicle using the DC charging pile in a first mode includes: Based on the duration of the second time period, determine the first expected charging amount within the second time period; The second expected charging amount within the first time period is calculated based on the first expected charging amount, the target state of charge, and the current state of charge of the power battery. Based on the second desired charging amount and the duration of the first time period, calculate the first charging power of the power battery in the first mode; The power battery is charged using the DC charging pile at the first charging power.

4. The method according to claim 1, characterized in that, The scheduled charging instruction also includes target state of charge and charging strategy information; the target state of charge is used to represent the expected state of charge of the power battery at the specified time; the method further includes: If the specified time is reached at the current time, determine whether the current state of charge of the power battery has reached the target state of charge; If the current state of charge has not reached the target state of charge, and the charging strategy information indicates that power is prioritized, the DC charging pile will continue to charge the power battery. If the current state of charge has not reached the target state of charge, and the charging strategy information indicates time priority, charging of the power battery shall be stopped.

5. The method according to claim 1, characterized in that, During at least a portion of the second time period, charging the power battery using the DC charging pile in a second mode includes: The current state information of the power battery and the maximum charging power of the DC charging pile are obtained; the state information includes at least the state of charge information indicating the current state of charge of the power battery. Based on the status information, determine the maximum allowable charging power of the power battery at the current moment; Based on the maximum allowable charging power and the maximum charging power, the second charging power of the power battery in the second mode is determined; The power battery is charged using the DC charging pile at the second charging power.

6. The method according to claim 1, characterized in that, The first time period includes the peak and / or normal periods of the power supply system's electricity load; correspondingly, the second time period includes the off-peak periods of the power supply system's electricity load. or, The first time period includes the peak period of the power supply system's electricity load; correspondingly, the second time period includes the off-peak period and / or normal period of the power supply system's electricity load.

7. A charging device for an electric vehicle, characterized in that, include: The receiving module is used to receive a scheduled charging instruction for a target vehicle, which instructs the target vehicle to complete charging using a DC charging pile before a specified time. The available charging period between the instruction issuance time and the specified time includes a first period and a second period following the first period. The resources required per unit of electricity for charging the target vehicle during the first period are higher than those during the second period. A charging module is configured to charge the power battery of the target vehicle using the DC charging pile in a first mode for at least a portion of a first time period; and to charge the power battery using the DC charging pile in a second mode for at least a portion of a second time period; wherein, when the power battery is in the same state, the first charging power in the first mode is less than the second charging power in the second mode.

8. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to perform the method according to any one of claims 1 to 6.

9. A vehicle, characterized in that, Including the electronic device as described in claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that, when executed by a processor, cause the processor to perform the method as described in any one of claims 1 to 6.

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