Discharge control method, device, electronic device, and storage medium

Abstract

This application discloses a discharge control method, device, electronic device and storage medium, which relates to the automotive technical field, and in the discharge control method, a voltage signal output by a discharge device after being connected to a load is obtained, battery capacity information of a bidirectional charger connected to the discharge device is obtained, a load type corresponding to the obtained voltage signal is determined based on a pre-established correspondence between the voltage signal and the load type, and the bidirectional charger is controlled to discharge to the load based on a pre-defined discharge strategy and battery capacity information corresponding to the determined load type, thereby classifying the loads and discharging different types of loads with different discharge strategies rather than discharging all loads with a single discharge control strategy, which is favorable for fully utilizing the electric energy of the electric vehicle and improving the discharge efficiency of the electric vehicle.

Description

Related Applications

[0001] This application claims priority from a Chinese patent application filed on August 12, 2021, bearing application number 202110924126.8 and entitled "Discharge control method, device, electronic device and storage medium," the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] The present application relates to the field of automotive technology, and in particular to a discharge control method, device, electronic device, and storage medium. [Background technology]

[0003] With the development of energy conservation and environmental protection concepts, electric vehicles are taking up an increasingly larger share of the automobile market, and users' demands for the convenience of electric vehicles are also increasing. If the mobile energy storage characteristics of electric vehicles can be fully utilized while idle to provide discharge services for other electric vehicles and electronic devices other than electric vehicles, the practicality of electric vehicles can be greatly improved and the further rapid development of electric vehicles can be vigorously promoted. For this reason, vehicle-to-load (VTOL) technology has emerged. However, how to improve discharge efficiency when discharging to a load from a vehicle is an issue that must be resolved urgently. DISCLOSURE OF THE INVENTION

[0004] According to an embodiment of the present application, there are provided a discharge control method, device, electronic device, and storage medium for improving discharge efficiency when a vehicle discharges to a load.

[0005] According to a first aspect, in an embodiment of the present application, there is provided a discharge control method applied to an electric vehicle, comprising: Acquire a voltage signal output from the discharge device after it is connected to the load, and acquire battery capacity information of the bidirectional charger connected to the discharge device; determining a load type corresponding to the acquired voltage signal based on a pre-established correspondence between the voltage signal and the load type; A discharge control method is provided, which includes controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information.

[0006] According to a second aspect, in an embodiment of the present application, there is provided a discharge control device applied to an electric vehicle, comprising: an acquisition unit for acquiring a voltage signal output by the discharge device after the discharge device is connected to the load, and acquiring battery capacity information of the bidirectional charger connected to the discharge device; a determining unit for determining a load type corresponding to the acquired voltage signal based on a pre-established correspondence between the voltage signal and the load type; and a control unit for controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information.

[0007] According to a third aspect, in an embodiment of the present application, there is provided an electronic device including at least one processor and a memory communicatively coupled to the at least one processor, There is provided an electronic device in which instructions to be executed by at least one processor are stored in a memory, and the at least one processor executes the instructions to realize the discharge control method.

[0008] According to a fourth aspect, an embodiment of the present application provides a storage medium storing instructions that, when executed by a processor of an electronic device, enable the electronic device to perform the discharge control method described above.

[0009] In an embodiment of the present application, the voltage signal output by the discharge device after it is connected to the load is obtained, and battery capacity information of the bidirectional charger connected to the discharge device is obtained. Based on a pre-established correspondence between the voltage signal and the load type, the load type corresponding to the obtained voltage signal is determined, and then the bidirectional charger is controlled to discharge to the load based on a predetermined discharge strategy and battery capacity information corresponding to the determined load type. In this way, by classifying the loads and discharging different types of loads with different discharge strategies rather than discharging all loads with a single discharge control strategy, it is advantageous to fully utilize the electric energy of the electric vehicle and improve the discharging efficiency of the electric vehicle. [Brief explanation of the drawings]

[0010] The drawings described herein are included to further the understanding of the present application, constitute a part of this application, and the illustrative embodiments and description thereof are intended to explain the present application without unduly limiting the present application. [Figure 1] 1 is a diagram showing an application scene of a discharge control method provided in an embodiment of the present application. [Figure 2] 2 is a flowchart of a discharge control method provided in an embodiment of the present application. [Figure 3] 4 is a flowchart illustrating a case where a bidirectional charger provided in an embodiment of the present application is controlled to discharge a load of an electric vehicle. [Figure 4] 4 is a flowchart of another discharge control method provided in an embodiment of the present application. [Figure 5] FIG. 10 is a diagram illustrating a further discharge control process provided in an embodiment of the present application. [Figure 6] FIG. 2 is a diagram showing a discharge control process provided in an embodiment of the present application. [Figure 7] FIG. 10 is a diagram showing another discharge control process provided in an embodiment of the present application. [Figure 8] FIG. 2 is a diagram showing the structure of a discharge control device provided in an embodiment of the present application. [Figure 9]FIG. 2 is a diagram illustrating a hardware structure of an electronic device for implementing a discharge control method provided in an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0011] In order to improve the discharge efficiency when a vehicle discharges to a load, embodiments of the present application provide a discharge control method, device, electronic device, and storage medium.

[0012] Preferred embodiments of the present application will be described below in conjunction with the drawings. It should be understood that the preferred embodiments described herein do not limit the present application, but are intended to explain and interpret the present application, and that the embodiments and features of the embodiments of the present application can be combined with each other unless they are inconsistent.

[0013] FIG. 1 is a diagram illustrating an application scenario of the discharge control method provided in an embodiment of the present application, including electric vehicle 1, electric vehicle 2, a computer, discharge gun 1 (which can be considered a discharge device), and discharge gun 2 (which can also be considered a discharge device), where discharge gun 1 can be connected to electric vehicle 2, discharge gun 2 can be connected to an outlet, and the power line of the computer can be inserted into the outlet. In a specific implementation, when discharge gun 1 is inserted into the discharge port of electric vehicle 1, electric vehicle 1 can discharge to electric vehicle 2. When discharge gun 2 is inserted into the discharge port of electric vehicle 1, electric vehicle 1 can discharge to the computer via the outlet.

[0014] Generally, different loads have different discharge needs, for example, electric vehicles require high voltage and current, while electrical appliances such as computers and mobile phones only require a stable voltage. To enable electric vehicles to discharge efficiently, the loads are divided into electric vehicle loads and electrical appliance loads (i.e., loads other than electric vehicle loads), and then different discharge strategies are used for different types of loads. Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings.

[0015] FIG. 2 is a flowchart of a discharge control method provided in an embodiment of the present application, which includes the following steps:

[0016] In step S201, a voltage signal output from the discharge device after it is connected to the load is obtained, and battery capacity information of the bidirectional charger connected to the discharge device is obtained.

[0017] In step S202, the load type corresponding to the acquired voltage signal is determined based on a pre-established correspondence between the voltage signal and the load type.

[0018] In specific implementation, one, two, or more discharge devices can be connected to an electric vehicle, for example, two discharge devices can be connected to an electric vehicle, one discharge device can charge a load such as an electric vehicle, and the other discharge device can charge a load such as an electrical appliance. However, since the charging needs of these two types of loads are different, the voltage signals output by the two discharge devices when connected to the corresponding types of loads are also different. In order to automatically identify the load type, a correspondence between the voltage signals and the load type can be established in advance, and then, when charging a load, the load type of the load can be determined based on the voltage signal output from the charging gun connected to the load and the correspondence.

[0019] In step S203, the bidirectional charger is controlled to discharge the load based on the predetermined discharge strategy corresponding to the determined load type and the battery capacity information.

[0020] First situation: The determined load type is a specific type, such as electric vehicles.

[0021] In this situation, the bidirectional charger can be controlled to discharge to the load according to the process shown in FIG. 3, which includes the following steps:

[0022] In step S301a, the battery capacity level of the bidirectional charger is determined based on the battery capacity information and the capacity level division rules.

[0023] In a specific implementation, the battery capacity of the bidirectional charger can be determined based on the battery capacity information, and if the battery capacity of the bidirectional charger is between 100% and 80%, the battery capacity level can be determined to be a first level (sufficient battery capacity), if the battery capacity of the bidirectional charger is between 80% and 50%, the battery capacity level can be determined to be a second level (appropriate battery capacity), and if the battery capacity of the bidirectional charger is between 50% and 30%, the battery capacity level can be determined to be a third level (slightly insufficient battery capacity).On the other hand, if the battery capacity of the bidirectional charger is below a predetermined value, such as 30%, the power amount of the first electric vehicle itself is low (insufficient battery capacity), and external discharge can be stopped.

[0024] According to the above example, it can be seen that the battery capacities corresponding to the first, second and third levels decrease gradually.

[0025] In step S302a, the bidirectional charger is controlled to discharge the battery to the load according to a discharge strategy corresponding to the battery capacity level.

[0026] In a specific implementation, the discharging voltage and current can be determined based on a discharging strategy corresponding to the battery capacity level. For example, when the battery capacity level is a first level, the bidirectional charger determines the maximum current for discharging at a specific voltage, and then determines the specific voltage and maximum current as the discharging voltage and current, respectively. When the battery capacity level is a second level, the bidirectional charger determines the maximum voltage for discharging at a specific current, and then determines the maximum voltage and specific current as the discharging voltage and current, respectively. When the battery capacity level is a third level, the bidirectional charger determines the maximum voltage and maximum current it can provide, and then determines the maximum voltage and maximum current it can provide as the discharging voltage and current, respectively. Then, the bidirectional charger is controlled to discharge to the load based on the determined discharging voltage and current.

[0027] In this way, by constantly adjusting the current and voltage output by the bidirectional charger in accordance with changes in battery capacity, i.e., by adjusting the output power of the bidirectional charger rather than constantly using the same output power for external discharge, it is possible to maximize the battery utilization efficiency and advantageously maximize the discharge efficiency.

[0028] Second situation: The determined load type is not a specific type.

[0029] In this situation, based on the battery capacity information, the bidirectional charger can be controlled to discharge the load at a set voltage and current below the set value, thereby charging the load and protecting the load from being burned by excessive current.

[0030] FIG. 4 is a flowchart of another discharge control method provided in an embodiment of the present application, which includes the following steps:

[0031] In step S401, a voltage signal output from the discharge device after it is connected to the load is obtained, and battery capacity information of the bidirectional charger connected to the discharge device is obtained.

[0032] In step S402, the load type corresponding to the acquired voltage signal is determined based on a pre-established correspondence between the voltage signal and the load type.

[0033] In step S403, it is determined whether the battery capacity of the bidirectional charger indicated by the battery capacity information exceeds a predetermined value. If NO, the process proceeds to S404, and if YES, the process proceeds to S405.

[0034] Here, the predetermined value can indicate the minimum battery capacity when the bidirectional charger discharges externally. When the battery capacity of the bidirectional charger exceeds the predetermined value, it indicates that the bidirectional charger is capable of performing external discharge. When the battery capacity of the bidirectional charger is equal to or less than the predetermined value, it indicates that the battery capacity of the bidirectional charger itself is low and it is possible to not perform external discharge and to reserve its own power.

[0035] In step S404, it is determined that the bidirectional charger is not to be controlled to discharge to the load.

[0036] In step S405, the bidirectional charger is controlled to discharge the load according to the predetermined discharge strategy corresponding to the determined load type and the battery capacity information.

[0037] In step S406, the battery capacity information of the bidirectional charger is monitored during discharging to the load.

[0038] In step S407, if it is determined based on the monitored battery capacity information that the battery capacity of the bidirectional charger has decreased to a predetermined value, the bidirectional charger is controlled to stop discharging to the load.

[0039] In the above process, there is no strict order between step S402 and step S403.

[0040] FIG. 5 is a flowchart of another discharge control method provided in an embodiment of the present application, which includes the following steps:

[0041] In step S501, a voltage signal output from the discharge device after it is connected to the load is obtained, and battery capacity information of the bidirectional charger connected to the discharge device is obtained.

[0042] In step S502, the load type corresponding to the acquired voltage signal is determined based on a pre-established correspondence between the voltage signal and the load type.

[0043] In step S503, if the determined load type is a specific type, communication is made with the load to obtain expected power amount information of the load.

[0044] In step S504, based on the battery capacity information and the expected power information of the load, determine the remaining battery capacity of the bidirectional charger after providing the corresponding power amount.

[0045] In step S505, it is determined whether the remaining battery capacity exceeds a predetermined value. If NO, the process proceeds to S506, and if YES, the process proceeds to S507.

[0046] In step S506, it is determined that the bidirectional charger is not to be controlled to discharge to the load.

[0047] In step S507, the battery capacity level of the bidirectional charger is determined according to the battery capacity information and the capacity level division rules.

[0048] In step S508, the bidirectional charger is controlled to discharge to the load according to a discharge strategy corresponding to the battery capacity level.

[0049] In step S509, after determining that the amount of power provided by the bidirectional charger to the load has reached the expected amount of power of the load, the bidirectional charger stops discharging to the load.

[0050] In step S510, if the determined load type is not a specific type, the bidirectional charger is controlled based on the battery capacity information to discharge the load at a set voltage and a current below the set value.

[0051] In step S511, the battery capacity information of the bidirectional charger is monitored during discharging to the load.

[0052] In step S512, if it is determined based on the monitored battery capacity information that the battery capacity of the bidirectional charger has decreased to a predetermined value, the bidirectional charger is controlled to stop discharging to the load.

[0053] The above process will now be described using an example where the particular load type is an electric vehicle.

[0054] FIG. 6 shows a discharge control process provided in an embodiment of the present application, which includes a battery, a direct current (DC / DC) converter, a power factor correction (PFC) converter, a load, a battery management system (BMS), an application layer interface module, a DC-DC control module, and a PFC control module. The PFC converter and the DC / DC converter form a bidirectional charger, and L1, L2...L6 are inductances, C1, C2...C6 are capacitances, and Q1, Q2...Q24 are MOS tubes.

[0055] In specific implementation, after the discharge device is inserted, the bidirectional charger automatically controls the electronic lock to lock it, preventing the discharge device from being accidentally removed. The BMS sends a discharge enable command to the application layer interface module via the CAN bus. The application layer interface module sends the discharge enable command to the DC-DC control module in the active state via the serial port. The DC-DC control module sends a discharge enable command to the PFC control module via the I / O port so that the PFC control module performs a self-test. After the PFC control module passes the self-test, it sends a high-level signal to the DC-DC control module. After receiving the high-level signal, the DC-DC control module sends a discharge enable command to the PFC control module via the I / O port. Then, the DC-DC control module and the PFC control module control the opening and closing of the MOS tube to discharge to the load.

[0056] The BMS also receives the voltage signal output by the discharge device and determines the current load type based on the voltage signal and the voltage ranges corresponding to different types of loads. If the load type is an electric vehicle (i.e., vehicle-to-vehicle discharge), it further determines whether three-phase or single-phase electricity is required during discharge. If the load type is an electrical appliance (i.e., vehicle-to-electrical appliance discharge), it can output 220Vac AC electricity to charge the electrical appliance through the power outlet, and at this time, it can limit the output current to below the set value to avoid burning the electrical appliance.

[0057] FIG. 7 is a diagram showing another discharge control process provided in an embodiment of the present application, which includes the following steps:

[0058] In step S701, the BMS obtains the voltage signal output by the discharge device after it is connected to the load.

[0059] In step S702, the BMS determines the load type based on the voltage signal and the voltage ranges corresponding to different load types.

[0060] In step S703, the BMS determines whether charging is possible based on the battery pack information and the load type. If the result is NO, the process proceeds to S704, and if the result is YES, the process proceeds to S705.

[0061] Here, the battery back information includes battery capacity, battery temperature, output voltage, etc., and if the battery capacity is less than a predetermined value, the battery temperature is higher than a predetermined temperature, or the battery voltage exceeds a predetermined voltage, it can be determined that charging is not possible.

[0062] If the load type is an electric vehicle, it can also be determined that charging is not possible if the remaining battery capacity after the electric vehicle provides the expected amount of power is less than the installed value.

[0063] In step S704, it is notified that the charging requirements are not met.

[0064] In step S705, the BMS determines the output voltage and current of the bidirectional charger based on the battery capacity and the load type.

[0065] In step S706, the voltage and current are sent to the bidirectional charger so that the bidirectional charger adjusts its own output voltage and current.

[0066] During charging, the BMS can further monitor battery backup information. If it determines that the battery capacity is below a predetermined value, the battery temperature is higher than a predetermined temperature, or the battery voltage exceeds a predetermined voltage, it can control the bidirectional charger to stop discharging to the load, and notify all vehicles via the bus and display a warning on the dashboard or through an indicator lamp. After the bidirectional charger stops discharging, if it detects that the output voltage is below 36V, it will control the electronic lock to unlock and prevent electric shock.

[0067] The process of vehicle-to-vehicle discharge and vehicle-to-electrical equipment discharge will be explained in detail below.

[0068] First, vehicle-to-vehicle discharge Assuming that electric vehicle 1 discharges power to electric vehicle 2, in a specific implementation, the BMS of electric vehicle 1 communicates with the BMS of electric vehicle 2 to obtain the expected power amount of electric vehicle 2, and the BMS of electric vehicle 1 calculates the remaining battery capacity of the bidirectional charger after providing the corresponding power amount, and when the remaining battery capacity exceeds a predetermined value, such as 30%, it sends a discharge command to the application layer interface module, and the application layer interface module sends a discharge enable command via the serial port to start discharging power to electric vehicle 2; when the remaining battery capacity is below the predetermined value, such as 30%, it does not send a discharge command to the application layer interface module, i.e., it does not discharge power to electric vehicle 2.

[0069] Here, when discharging the electric vehicle 2, the discharge mode can be switched according to the battery capacity. For example, when the battery capacity is high (corresponding to the first level), the discharge output voltage value is higher than the expected voltage of the electric vehicle 2, and full output is output, thereby achieving the purpose of fast charging the electric vehicle 2. When the battery capacity is appropriate (corresponding to the second level), the discharge output voltage value can be reduced and the discharge current can be kept constant. When the battery capacity is low (corresponding to the third level), if the output requirements are met, the output power can be gradually reduced. This control strategy can improve the utilization rate of the battery's power.

[0070] Second, vehicle-to-electrical equipment discharge When discharging to an electrical device, a different control principle is used than when discharging to a car, the control logic is not as complicated as when discharging to a car, some MOS tubes and functional circuits in the overall configuration enter a sleep state, reducing overall power consumption and improving battery utilization efficiency, and the maximum output current can be limited for safety and practicality reasons.

[0071] When the methods provided in the embodiments of the present application are implemented by software, hardware, or a combination of software and hardware, the electronic device may include multiple functional modules, and each functional module may include software, hardware, or a combination thereof.

[0072] FIG. 8 is a structural diagram of a discharge control device provided in an embodiment of the present application, which includes an obtaining unit 801, a determining unit 802 and a control unit 803.

[0073] The acquisition unit 801 acquires the voltage signal output by the discharge device after it is connected to the load, and acquires the battery capacity information of the bidirectional charger connected to the discharge device.

[0074] The determining unit 802 determines the load type corresponding to the acquired voltage signal based on a pre-established correspondence between the voltage signal and the load type.

[0075] The control unit 803 controls the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information.

[0076] In some possible embodiments, if the determined load type is a particular type, the control unit 803 specifically: determining a battery capacity level of the bidirectional charger based on the battery capacity information and a capacity level division rule; The bidirectional charger is controlled to discharge the load based on a discharge strategy corresponding to the battery capacity level.

[0077] In some possible embodiments, the control unit 803 specifically: determining a voltage and a current for discharging based on a discharging strategy corresponding to the battery capacity level; Based on the voltage and the current, the bidirectional charger is controlled to discharge the load.

[0078] In some possible embodiments, the control unit 803 specifically: If the battery capacity level is a first level, the bidirectional charger determines a maximum current when discharging at a specific voltage, and determines the specific voltage and the maximum current as the voltage and current when discharging, respectively; If the battery capacity level is a second level, determining a maximum voltage when the bidirectional charger discharges at a specific current, and determining the maximum voltage and the specific current as the voltage and current when discharging, respectively; If the battery capacity level is a third level, determining a maximum voltage and a maximum current that the bidirectional charger can provide, and determining the maximum voltage and the maximum current that the bidirectional charger can provide as a voltage and a current when discharging, respectively; Here, the battery capacities corresponding to the first level, the second level, and the third level decrease gradually.

[0079] In some possible embodiments, an interactive unit 804 that communicates with the load to obtain expected power information of the load; determining a remaining battery capacity of the bidirectional charger after providing a corresponding amount of power based on the battery capacity information and the expected power amount information of the load; After the control unit 803 determines that the remaining battery capacity exceeds a predetermined value, it controls the bidirectional charger to discharge to the load.

[0080] In some possible embodiments, the control unit 803 further comprises: After determining that the amount of power provided by the bidirectional charger to the load has reached the amount of power expected by the load, discharging to the load is stopped.

[0081] In some possible embodiments, if the determined load type is not a specific type, the control unit 803 may specifically: Based on the battery capacity information, the bidirectional charger is controlled to discharge to the load at a set voltage and a current equal to or less than a set value.

[0082] In some possible embodiments, the control unit 803 further comprises: When the battery capacity information indicates that the battery capacity of the bidirectional charger exceeds a predetermined value, the bidirectional charger is controlled to discharge to the load.

[0083] In some possible embodiments, the acquisition unit 801 monitors battery capacity information of the bidirectional charger during discharging to the load; When the control unit 803 determines based on the monitored battery capacity information that the battery capacity of the bidirectional charger has decreased to a predetermined value, it controls the bidirectional charger to stop discharging to the load.

[0084] In some possible embodiments, the particular type is an electric vehicle.

[0085] The module partitions in the embodiments of the present application are illustrative and represent logical and functional partitions. Other partitioning methods may be used in actual implementation. Each functional module in each embodiment of the present application may be integrated into a single processor, may exist physically alone, or two or more modules may be integrated into a single module. The modules may be coupled via interfaces, which are typically electrical communication interfaces, but mechanical interfaces or other types of interfaces are not excluded. Therefore, modules described as separate components may be physically separate or not, and may be located in one place or distributed in different locations in the same or different devices. The integrated modules may be implemented in the form of hardware or software functional modules.

[0086] In a further embodiment of the present application, an electric vehicle including the above-described discharge control device is provided.

[0087] 9 is a diagram showing the structure of an electronic device provided in an embodiment of the present application, which includes physical devices such as a transceiver 901 and a processor 902, where the processor 902 can be a central processing unit (CPU), a microprocessor, a dedicated integrated circuit, a programmable logic circuit, a large scale integrated circuit, or a digital processing unit, etc. The transceiver 901 is used to receive and transmit data between the electronic device and other devices.

[0088] The electronic device further includes a memory 903 for storing software instructions executed by the processor 902 and may also store some other data required by the electronic device, such as electronic device marking information, electronic device encryption information, user data, etc. The memory 903 can be a volatile memory, such as a random-access memory (RAM), a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. The memory 903 may also be a combination of the above-mentioned memories.

[0089] In the embodiments of the present application, the specific connection medium between the processor 902, memory 903, and transceiver 901 is not limited. In FIG. 9 of the embodiments of the present application, the memory 903, processor 902, and transceiver 901 are connected only via a bus 904. The bus is shown in FIG. 9 with a thick line, and the connection between other components is described as an example, but is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For convenience of illustration, only one thick line is shown in FIG. 9, but this does not mean that only one bus or one type of bus is present.

[0090] The processor 902 can be dedicated hardware or a processor that executes software. When the processor 902 executes software, the processor 902 reads the software instructions stored in the memory 903 and, driven by the software instructions, executes the discharge control method according to the above-described embodiments.

[0091] An embodiment of the present application further provides a storage medium, and when a processor of an electronic device executes instructions in the storage medium, the electronic device can realize the discharge control method according to the above-described embodiment.

[0092] In some possible embodiments, various aspects of the discharge control method provided herein can be realized in the form of a program product, which includes program code, and when the program product is executed in an electronic device, the program code causes the electronic device to realize the discharge control method related to the above-mentioned embodiments.

[0093] The program product may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific (non-limiting) examples of readable storage media include an electrical connection having one or more leads, a portable disk, a hard disk, RAM, ROM, an erasable programmable read-only memory (EPROM), flash memory, optical fiber, a compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0094] In the embodiments of the present application, the program product for discharge control may be a CD-ROM, may contain program code, and may be executed by a computing device. However, the program product of the present application is not limited to this, and in the present application, a readable storage medium may be any tangible medium that contains or stores a program, and the program may be used in or in connection with an instruction execution system, apparatus, or device.

[0095] A readable signal medium includes a data signal, transmitted in baseband or propagated as part of a carrier wave, bearing readable program code. Such propagated data signals may be in various forms, such as, but not limited to, electromagnetic waves, optical signals, or any combination thereof. A readable signal medium may be any readable medium, other than a readable storage medium, by which a program for use in or in connection with an instruction execution system, apparatus, or device is transmitted, propagated, or transmitted.

[0096] The program code contained in the readable medium may be transmitted over any suitable medium, including wirelessly, by wire, by optical cable, by radio frequency (RF), etc., or any combination thereof.

[0097] Program code for carrying out the operations of the present application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., as well as conventional procedural programming languages such as "C" or similar. The program code can be executed entirely on a user's computing device, partially on a user device, as a separate package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user's computing device via any type of network, such as a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., via the Internet using an Internet Service Provider).

[0098] Although the above detailed description describes several units or sub-units of the device, such division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more of the above-described units may be embodied in a single unit. Conversely, the features and functions of a single unit may be further divided into multiple units and embodied.

[0099] Furthermore, although the figures illustrate method steps in a particular order, this does not require or imply that the steps should be performed in such a particular order, or that all steps must be performed to achieve the desired results. As an additional or backup solution, some steps may be omitted, multiple steps may be combined into one, and / or one step may be divided into multiple steps.

[0100] Those skilled in the art will appreciate that the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. The present application may also take the form of a computer program product executed on one or more computer-usable storage media (including, but not limited to, magnetic memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0101] The present application has been described with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams, are implemented by computer program instructions. These computer program instructions can be transmitted to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a device that, when executed by the processor of the computer or other programmable data processing device, implements the function(s) identified in one or more processes in the flowcharts and / or one or more blocks in the block diagrams.

[0102] These computer program instructions can be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner to produce an article of manufacture that includes an instruction apparatus with instructions stored in the computer-readable memory, the instruction apparatus implementing the function(s) identified in a process or processes in the flowcharts and / or a block or blocks in the block diagrams.

[0103] These computer program instructions may be installed in a computer or other programmable data processor to cause the computer or other programmable device to perform a series of operational steps to generate a computer-implemented process, the instructions executing on the computer or other programmable device providing steps for implementing the functions identified in one or more processes in the flowcharts and / or one or more blocks in the block diagrams.

[0104] Although the preferred embodiments of the present application have been described, those skilled in the art can make other changes and modifications to these embodiments after grasping the basic creative concept. Therefore, the appended claims should be interpreted to include the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0105] Those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, these modifications and variations are included in the present application.

Claims

1. A discharge control method applied to an electric vehicle, comprising: Acquire a voltage signal output from the discharge device after it is connected to the load, and acquire battery capacity information of the bidirectional charger connected to the discharge device; determining a load type corresponding to the acquired voltage signal based on a pre-established correspondence relationship between the voltage signal and the load type; controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information; If the determined load type is a specific type, controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information; determining a battery capacity level of the bidirectional charger based on the battery capacity information and a capacity level division rule, where the battery capacity level of the bidirectional charger is a first level if the battery capacity of the bidirectional charger is between 100% and 80%, a second level if the battery capacity of the bidirectional charger is between 80% and 50%, and a third level if the battery capacity of the bidirectional charger is between 50% and 30%; determining a voltage and a current for discharging based on a discharging strategy corresponding to the battery capacity level; controlling the bidirectional charger to discharge the load based on the voltage and the current; When the battery capacity level is the first level, determining a maximum current when the bidirectional charger discharges at a specific voltage, and determining the determined maximum current and the specific voltage as a current and a voltage when the bidirectional charger discharges, respectively; When the battery capacity level is the second level, determining a maximum voltage when the bidirectional charger discharges at a specific current, and determining the determined maximum voltage and the specific current as the voltage and current when discharging, respectively; When the battery capacity level is the third level, determining a maximum voltage and a maximum current that can be provided by the bidirectional charger, and setting the determined maximum voltage and maximum current as the voltage and current when discharging. A discharge control method comprising:

2. Communicating with the load to obtain expected power amount information of the load; determining a remaining battery capacity of the bidirectional charger after providing a corresponding amount of power based on the battery capacity information and the expected power amount information of the load; 2. The method of claim 1, further comprising: controlling the bidirectional charger to discharge the load after determining that the remaining battery capacity exceeds a predetermined value.

3. 3. The discharge control method of claim 2, further comprising: stopping discharge to the load after determining that an amount of power provided to the load by the bidirectional charger has reached an expected amount of power of the load.

4. If the determined load type is not the specific type, controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the determined load type and the battery capacity information; 2. The discharge control method according to claim 1, further comprising controlling the bidirectional charger so as to discharge to the load at a set voltage and a current equal to or less than a set value based on the battery capacity information.

5. 5. The discharge control method according to claim 1, wherein when the state according to the battery capacity information indicates a state including a state in which the battery capacity of the bidirectional charger exceeds a predetermined value, the bidirectional charger is controlled to discharge to the load.

6. monitoring battery capacity information of the bidirectional charger during discharging to the load; 10. The discharge control method according to claim 1, further comprising: controlling the bidirectional charger to stop discharging to the load when it is determined based on the monitored battery capacity information that the battery capacity of the bidirectional charger has decreased to a predetermined value.

7. 5. The discharge control method according to claim 1, wherein the specific type is an electric vehicle.

8. A discharge control device applied to an electric vehicle, an acquisition unit for acquiring a voltage signal output by the discharge device after the discharge device is connected to the load, and acquiring battery capacity information of the bidirectional charger connected to the discharge device; a determining unit for determining a load type corresponding to the acquired voltage signal based on a pre-established correspondence relationship between the voltage signal and the load type; a control unit for controlling the bidirectional charger to discharge the load based on a predetermined discharge strategy corresponding to the load type determined by the determination unit and the battery capacity information; If the determined load type is a specific type, the control unit determining a battery capacity level of the bidirectional charger based on the battery capacity information and a capacity level division rule, where the battery capacity level of the bidirectional charger is a first level if the battery capacity of the bidirectional charger is between 100% and 80%, a second level if the battery capacity of the bidirectional charger is between 80% and 50%, and a third level if the battery capacity of the bidirectional charger is between 50% and 30%; determining a voltage and a current for discharging based on a discharging strategy corresponding to the battery capacity level; controlling the bidirectional charger to discharge the load based on the voltage and the current; When the battery capacity level is the first level, determining a maximum current when the bidirectional charger discharges at a specific voltage, and determining the determined maximum current and the specific voltage as a current and a voltage when the bidirectional charger discharges, respectively; When the battery capacity level is the second level, determining a maximum voltage when the bidirectional charger discharges at a specific current, and determining the determined maximum voltage and the specific current as the voltage and current when discharging, respectively; When the battery capacity level is the third level, a maximum voltage and a maximum current that can be provided by the bidirectional charger are determined, and the determined maximum voltage and maximum current are set as the voltage and current during discharging, respectively. A discharge control device characterized by:

9. an interactive unit that communicates with the load to obtain expected power information of the load, and determines a remaining battery capacity of the bidirectional charger after providing a corresponding amount of power based on the battery capacity information and the expected power information of the load; The discharge control device of claim 8 , wherein the control unit further controls the bidirectional charger to discharge to the load after determining that the remaining battery capacity exceeds a predetermined value.

10. The control unit further comprises: The discharge control device according to claim 9, wherein the bidirectional charger stops discharging the load after determining that the amount of power provided to the load by the bidirectional charger has reached the amount of power expected by the load.

11. If the determined load type is not the particular type, the control unit:

9. The discharge control device according to claim 8, wherein the bidirectional charger is controlled based on the battery capacity information so as to discharge to the load at a set voltage and a current equal to or less than a set value.

12. The control unit further comprises:

12. The discharge control device according to claim 8, wherein when the state according to the battery capacity information indicates a state including a state in which the battery capacity of the bidirectional charger exceeds a predetermined value, the bidirectional charger is controlled to discharge to the load.

13. The acquisition unit further monitors battery capacity information of the bidirectional charger during discharging to the load; 12. The discharge control device according to claim 8 or 11, wherein the control unit further controls the bidirectional charger to stop discharging to the load when it determines, based on the battery capacity information monitored by the acquisition unit, that the battery capacity of the bidirectional charger has decreased to a predetermined value.

14. 12. The discharge control device according to claim 8, wherein the specific type is an electric vehicle.

15. 1. An electronic device including at least one processor and a memory communicatively coupled to the at least one processor, An electronic device characterized in that instructions to be executed by the at least one processor are stored in the memory, and the at least one processor executes the instructions, thereby causing the at least one processor to perform the steps of the discharge control method described in claim 1 or 4.

16. A storage medium storing instructions that, when executed by a processor of an electronic device, enable the electronic device to perform the steps of the discharge control method according to claim 1 or 4.

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