Charging current adaptive control method without changing structure of direct current charging pile

Abstract

The invention provides a charging current adaptive control method without changing the structure of a direct current charging pile, and the method comprises the steps: detecting whether a target vehicle has a charging demand or not based on an ordered charging control device, and if yes, obtaining the load state information of a transformer area, load information capable of being provided by the transformer area is determined based on the information, charging pile interaction information and charging parameters and is sent to the main control unit; if the preset condition is met, closing the target charging switch to complete the charging task; wherein in the charging process, the equipment charging controller sends charging state information of a target vehicle to the main control unit according to a preset period; and the main control unit judges whether a current change instruction exists or not, if yes, the charging state information of the target vehicle is adjusted, and the adjusted information is sent to a vehicle charging controller so as to change the charging power. According to the embodiment, the charging power is dynamically adjusted by monitoring the load state and the charging requirement of the transformer area in real time, the charging efficiency is improved, and then the charging experience of a user is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric vehicle charging, and in particular to a charging current adaptive control method without changing the structure of a DC charging pile. Background Art

[0002] With the advancement of the "dual carbon" strategy, the electric vehicle market has flourished and the demand for charging has risen sharply. The country has actively deployed and accelerated the construction of charging infrastructure, while emphasizing technological innovation and safety assurance. At present, the construction of DC high-power charging piles is accelerating, but the capacity limitation of the station area has led to a prominent contradiction between supply and demand during the peak charging period. To solve this problem, it is key to use big data technology to monitor the status of charging piles in real time, predict loads, and optimize charging control.

[0003] In the related technologies, although there are methods that use fuzzy analytic hierarchy process (FAHP) and other means to evaluate the real-time electrical data and safety performance of charging piles, and control them based on the charging demand of the on-board BMS (battery management system) of electric vehicles, these methods generally have the problem of insufficient real-time performance and inability to timely classify and observe the status and safety performance of charging piles. On the other hand, although there are technologies that attempt to achieve orderly charging by integrating vehicle demand information with substation load information, the main problem is that the real-time adjustment of substation load is still insufficient. In addition, there are some related technologies that optimize charging scheduling plans by establishing electric vehicle charging load prediction models. However, their high reliance on historical data leads to slow response speeds when facing rapid fluctuations in charging demand, making it difficult to achieve true real-time dynamic adjustments. Summary of the invention

[0004] The disclosed embodiments at least provide a charging current adaptive control method without changing the structure of a DC charging pile, and dynamically adjust the charging power, optimize load management, improve charging efficiency, reduce energy waste, and ensure equipment safety by real-time monitoring of the load status and charging demand of the station area, thereby improving the user's charging experience.

[0005] The present disclosure provides a charging current adaptive control method without changing the structure of a DC charging pile, including:

[0006] Based on the orderly charging control device, it is detected whether the target vehicle has a charging demand; wherein the orderly charging control device includes a DC charging pile, a main control unit, and a charging equipment management device; the DC charging pile includes an equipment charging controller, and the charging equipment management device includes a vehicle charging controller;

[0007] When the DC charging pile detects that the target vehicle has a charging demand, the load status information of the area is obtained, and the load information that can be provided by the area is determined based on the load status information of the area, the charging pile interaction information corresponding to the device charging controller, and the charging parameter interaction information corresponding to the vehicle charging controller; and the load information that can be provided by the area is sent to the main control unit;

[0008] When the load information provided by the station area meets the preset conditions, the target charging switch is closed to complete the charging task of the target vehicle;

[0009] Wherein, during the charging process of the target vehicle, the device charging controller sends the charging status information of the target vehicle to the main control unit according to a preset period; and based on the main control unit, it is determined whether there is a current change instruction in the charging status information of the target vehicle; if so, the main control unit adjusts the charging status information of the target vehicle according to the current change instruction, and sends the adjusted charging status information of the target vehicle to the vehicle charging controller to change the charging power of the target vehicle.

[0010] In some possible embodiments, the orderly charging control device further includes a charging pile interface and a charging gun interface;

[0011] The charging pile interface is connected to the DC charging pile and the main control unit respectively, and is used to realize information transmission between the DC charging pile and the main control unit;

[0012] The charging gun interface is connected to the charging equipment management device and the main control unit respectively, and is used to realize information transmission between the charging equipment management device and the main control unit.

[0013] In some possible embodiments, the DC charging pile further includes an auxiliary power supply; before obtaining the load status information of the substation area, the following steps are included:

[0014] The vehicle charging controller is powered by the auxiliary power supply to obtain charging pile interaction information; and the charging pile interaction information is sent to the main control unit via the charging pile interface by the device charging controller;

[0015] After the vehicle charging controller is powered by the auxiliary power supply, it is determined whether the voltage of the vehicle charging controller reaches a preset value. If so, the charging parameter interaction information is sent to the main control unit via the charging gun interface through the vehicle charging controller.

[0016] In some possible embodiments, after the device charging controller sends the charging pile interaction information to the main control unit via the charging pile interface, the method includes:

[0017] The main control unit sends the charging pile interaction information to the vehicle charging controller through the charging gun interface;

[0018] Correspondingly, after the vehicle charging controller sends the charging parameter interaction information to the main control unit via the charging gun interface, it includes:

[0019] The main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface.

[0020] In some possible embodiments, after the main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface, the method includes:

[0021] According to the charging parameter interaction information, the maximum output information of the DC charging pile is determined based on the device charging controller; the device charging controller sends the maximum output information of the DC charging pile to the main control unit through the charging pile interface;

[0022] Accordingly, the determining that the load information that can be provided by the area based on the area load status information, the charging pile interaction information corresponding to the device charging controller, and the charging parameter interaction information corresponding to the vehicle charging controller includes:

[0023] The load information that the substation can provide is determined based on the substation load status information, the maximum output information of the DC charging pile, and the charging parameter interaction information.

[0024] In some possible embodiments, the target charging switch includes a first charging switch and a second charging switch; and when the load information provided by the station area satisfies a preset condition, closing the target charging switch includes:

[0025] Determine charging parameter information based on the main control unit according to the load information that can be provided by the station area; and send the charging parameter information to the vehicle charging controller through the charging gun interface by the main control unit;

[0026] Based on the vehicle charging controller, determine whether the charging parameter information meets the preset charging condition; if so, close the first charging switch corresponding to the vehicle charging controller; if not, end the charging task of the target vehicle, and control the auxiliary voltage to stop supplying power to the vehicle charging controller;

[0027] After the first charging switch is closed, the device charging controller retrieves whether the vehicle power supply circuit voltage meets the preset voltage requirement; if so, the second charging switch corresponding to the DC charging pile is closed to realize power supply to the target vehicle.

[0028] In some possible embodiments, after closing the target charging switch, the following steps are included:

[0029] When the main control unit receives a stop charging instruction issued by the device charging controller, the main control unit sends the stop charging instruction to the vehicle charging controller; after the vehicle charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle; or,

[0030] When the main control unit receives a stop charging instruction issued by the vehicle charging controller, the main control unit sends the stop charging instruction to the device charging controller; after the device charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle.

[0031] The embodiment of the present disclosure provides an orderly charging control device for executing any of the above-mentioned charging current adaptive control methods without changing the structure of a DC charging pile, the device comprises a DC charging pile, a charging pile interface, a main control unit, a charging gun interface and a charging device management device; the DC charging pile comprises a power supply, an auxiliary power supply and a device charging controller; the charging device management device comprises a rechargeable energy storage system and a vehicle charging controller;

[0032] The power supply is connected to the rechargeable energy storage system through the first charging pile switch via the first charging pile interface, the first charging gun interface and the charging device switch;

[0033] The device charging controller is connected to the main control unit through the second charging pile interface, and the main control unit is connected to the vehicle charging controller through the second charging gun interface; so as to realize information interaction between the device charging controller and the main control unit and between the vehicle charging controller and the main control unit;

[0034] The device charging controller is also connected to the first voltage detection point through the first protection resistor to detect the charging demand of the target vehicle; and is connected to the second protection resistor and the third protection resistor via the third charging pile interface and the third charging gun interface respectively and then grounded;

[0035] The auxiliary power supply is connected to the vehicle charging controller through the second charging pile switch via the fourth charging pile interface and the fourth charging gun interface, so as to realize the use of the auxiliary power supply to power the vehicle charging controller;

[0036] The vehicle charging controller is also connected to the second voltage detection point through a fourth protection resistor to detect the voltage of the vehicle charging controller; and is connected to the fifth protection resistor and then grounded.

[0037] An embodiment of the present disclosure provides a computer device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the computer device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, the charging current adaptive control method without changing the structure of the DC charging pile as described in any possible implementation manner described above is performed.

[0038] An embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the charging current adaptive control method without changing the structure of a DC charging pile as described in any of the above possible implementation modes is implemented.

[0039] The charging current adaptive control method provided in the embodiment of the present disclosure does not change the structure of the DC charging pile. On the basis of not changing the internal structure of the original charging pile, the orderly charging control device can be used to control the amount of electric energy transmitted during the charging process; when receiving the current adjustment instruction, the main control unit can be used to adjust the charging current of the DC charging pile, adjust the charging power, and then change the load proportion of the DC charging pile in the station area. In this way, by real-time monitoring of the station area load status and charging demand, the charging power is dynamically adjusted, the load management is optimized, the charging efficiency is improved, the energy waste is reduced, and the equipment safety is guaranteed, thereby improving the user's charging experience.

[0040] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required to be cited in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used together with the specification to illustrate the technical solutions of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A flow chart of a charging current adaptive control method without changing the structure of a DC charging pile provided by an embodiment of the present disclosure is shown;

[0043] Figure 2 A schematic diagram of the structure of an orderly charging control device provided by an embodiment of the present disclosure is shown;

[0044] Figure 3 A schematic diagram of the structure of a computer device provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0048] At present, my country is vigorously promoting the construction of DC high-power charging piles to effectively alleviate the problem of charging pile resource shortage. However, while DC charging piles have the advantage of high-efficiency charging, they also face the challenge of limited station capacity. Especially during the peak charging period, high power demand can easily lead to charging difficulties, which has become one of the key factors restricting the popularization of electric vehicles.

[0049] After research, it was found that in the relevant technologies, although there are methods that use fuzzy analytic hierarchy process (FAHP) and other means to evaluate the real-time electrical data and safety performance of charging piles, and control them based on the charging demand of the on-board BMS (battery management system) of electric vehicles, these methods generally have the problem of insufficient real-time performance and inability to timely classify and observe the status and safety performance of charging piles. On the other hand, although there are technologies that try to achieve orderly charging by integrating vehicle demand information with substation load information, the main problem is that the real-time adjustment of substation load is still insufficient. In addition, there are some related technologies that optimize charging scheduling plans by establishing electric vehicle charging load prediction models. However, their high reliance on historical data leads to slow response speeds when facing rapid fluctuations in charging demand, making it difficult to achieve true real-time dynamic adjustments.

[0050] Based on the above research, an embodiment of the present disclosure provides a charging current adaptive control method without changing the structure of a DC charging pile. Specifically, based on an orderly charging control device, it detects whether a target vehicle has a charging demand. When the DC charging pile detects the charging demand of the target vehicle, it obtains the load status information of the substation, and determines the load information that can be provided by the substation based on this information, the charging pile interaction information and the charging parameters, and sends it to the main control unit; if the preset conditions are met, the target charging switch is closed to complete the charging task; wherein, during the charging process, the device charging controller sends the charging status information of the target vehicle to the main control unit according to a preset period; the main control unit determines whether there is a current change instruction, and if so, adjusts the charging status information of the target vehicle, and sends the adjusted information to the vehicle charging controller to change the charging power.

[0051] In the disclosed embodiment, without changing the internal structure of the original charging pile, an orderly charging control device can be used to control the amount of electric energy transmitted during the charging process; when receiving a current adjustment instruction, the main control unit is used to adjust the charging current of the DC charging pile, adjust the charging power, and then change the load proportion of the DC charging pile in the area. In this way, by real-time monitoring of the load status and charging demand of the area, the charging power is dynamically adjusted, the load management is optimized, the charging efficiency is improved, the energy waste is reduced, and the equipment safety is guaranteed, thereby improving the user's charging experience.

[0052] To facilitate understanding of this embodiment, the execution subject of the adaptive control method for charging current without changing the structure of the DC charging pile provided in the embodiment of the present disclosure is first introduced in detail. The execution subject of the adaptive control method for charging current without changing the structure of the DC charging pile provided in the embodiment of the present disclosure is a computer device. The computer device can be a server. Among them, the server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud storage, big data and artificial intelligence platforms.

[0053] The following is a detailed description of the charging current adaptive control method without changing the DC charging pile structure provided by the embodiment of the present application in conjunction with the accompanying drawings. Figure 1 As shown, it is a flow chart of a charging current adaptive control method without changing the structure of a DC charging pile provided by an embodiment of the present disclosure, and the method includes the following S101-S103:

[0054] S101, based on the orderly charging control device, detect whether the target vehicle has a charging demand.

[0055] It can be understood that the orderly charging control device specifically includes a DC charging pile, a charging pile interface, a main control unit, a charging gun interface and a charging equipment management device; the DC charging pile includes a power supply, an equipment charging controller and an auxiliary power supply, and the charging equipment management device includes a vehicle charging controller and a rechargeable energy storage system.

[0056] Among them, the DC charging pile is the main equipment for charging electric vehicles, responsible for converting electricity from the power grid into DC power suitable for charging electric vehicle batteries; the power supply is used to provide the main power supply for the entire charging system, usually connected to the power grid; the charging device controller is responsible for managing and controlling the charging process; the auxiliary power supply is mainly used to provide the power required by the charging pile, support the normal operation of the device charging controller and other electrical components, and the auxiliary power supply is usually to ensure that the charging pile can maintain basic functions even in the event of a power outage, such as displaying status information or performing safety operations. The charging pile interface is the part where the DC charging pile is connected to the charging pile monitoring and control device (i.e., the main control unit); it is used to realize information transmission between the DC charging pile and the main control unit. The main control unit is the control center of the charging pile, coordinating the work of various components to ensure the smooth progress of the charging process. It usually integrates computer hardware and software, is responsible for executing charging instructions, and realizes data information interaction between the DC charging pile and the charging device management device. The charging gun interface connects the charging pile and the electric vehicle. The charging gun interface is the part where the charging device management device is connected to the main control unit, and is used to realize information transmission between the charging device management device and the main control unit. The vehicle equipment management device is responsible for the overall charging management of electric vehicles. Specifically, the vehicle charging controller is a device in the electric vehicle that manages various parameters during the charging process of the electric vehicle, including current, voltage and charging mode. The vehicle charging controller ensures that the electric vehicle battery is not subjected to excessive current or voltage during the charging process, thereby protecting the battery life and safety. The main function of the rechargeable energy storage system is to receive the electrical energy transmitted by the DC charging pile and store it for subsequent use by the electric vehicle.

[0057] Combine the following Figure 2 , the connection relationship of each component in the orderly charging control device is described in detail, such as Figure 2As shown in the figure, for the DC charging pile device part, a DC / AC converter (AC / DC) is used to convert the AC power in the power supply into DC power, which is connected to the first charging pile interface (DC+, DC- in the charging pile interface part in the figure) through the first charging pile switch (C1, C2 in the figure), and then connected to the charging device switch (C5, C6 in the figure) through the first charging gun interface (DC+, DC- in the charging gun interface part in the figure), and finally connected to the rechargeable energy storage system (which may be the battery pack of the electric vehicle). Here, the circuit also includes IMD insulation monitoring elements and safety protection elements such as FUSE and RCD, which are used to protect the system circuit from faults such as excessive current and leakage. When an abnormal situation occurs in the system circuit, these elements will quickly cut off the circuit to ensure the safety of the system; as well as measurement elements such as voltage measurement and current measurement, which are used to monitor the voltage, current and other parameters of the system in real time. In addition, a discharge circuit is also provided in the current charging pile, which is a circuit for controlling the charging and discharging process of the energy storage element. Its main function is to convert part of the electrical energy stored in the circuit into heat energy or other forms of energy to ensure that the circuit can safely and quickly release the residual charge in the energy storage element after power failure. Specifically, the device charging controller is connected to the main control unit through the second charging pile interface (S+, S- of the charging pile interface part in the figure), and the main control unit is connected to the vehicle charging controller through the second charging gun interface (S+, S- of the charging gun interface part in the figure); so as to realize the information interaction between the device charging controller and the main control unit and the vehicle charging controller and the main control unit. Among them, the device charging controller is also connected to the first voltage detection point U1 through the first protection resistor R1 to realize the detection of the charging demand of the target vehicle; and is connected to the second protection resistor R2 and the third protection resistor R3 respectively through the third charging pile interface (i.e. CC1 of the charging pile interface part in the figure) and the third charging gun interface (i.e. CC1 of the charging gun interface part in the figure) and then grounded. The auxiliary power supply is connected to the vehicle charging controller through the second charging pile switch (S3, S4 in the figure) through the fourth charging pile interface (i.e. A+, A- of the charging pile interface part in the figure) and the fourth charging gun interface (i.e. A+, A- of the charging gun interface part in the figure) to realize the use of the auxiliary power supply to power the vehicle charging controller. In addition, the vehicle charging controller is also connected to the second voltage detection point U2 through the fourth protection resistor R4 to detect the voltage of the vehicle charging controller; and is connected to the fifth protection resistor R5 and then grounded.

[0058] S102, when the DC charging pile detects that the target vehicle has a charging demand, obtains the load status information of the substation, and determines the load information that the substation can provide based on the load status information of the substation, the charging pile interaction information corresponding to the device charging controller, and the charging parameter interaction information corresponding to the vehicle charging controller; and sends the load information that the substation can provide to the main control unit.

[0059] It can be understood that when the device charging controller detects that the voltage at the voltage detection point U1 reaches a preset voltage value (for example, 4V), it can be determined that there is a target vehicle with a charging demand. At this time, the device charging controller controls the closing of the second charging pile switch (i.e. Figure 2 In S3 and S4), the auxiliary power supply in the DC charging pile supplies power to the vehicle charging controller and obtains the charging pile interaction information (which may include charging mode, charging status, etc.); and the charging pile interaction information is sent to the main control unit through the charging pile interface by the device charging controller, and the main control unit sends the charging pile interaction information to the vehicle charging controller through the charging gun interface. After the vehicle charging controller is powered by the auxiliary power supply, the voltage at the voltage detection point U2 is detected to determine whether the voltage of the vehicle charging controller reaches a preset value (for example, 10V, 15V). If so, the charging parameter interaction information (which may include vehicle battery information, charging current, charging voltage, and charging status, etc.) is sent to the main control unit through the charging gun interface by the vehicle charging controller, and the main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface.

[0060] Here, after the main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface, the device charging controller determines the maximum output information of the DC charging pile based on the charging parameter interaction information; and sends the maximum output information of the DC charging pile to the main control unit through the charging pile interface.

[0061] Specifically, after detecting the charging demand of the target vehicle, the load status information of the substation is obtained, and the main control unit obtains the load information that the substation can provide based on the maximum output information of the DC charging pile, the charging parameter interaction information, and the load status information of the substation; and the load information that the substation can provide is sent to the main control unit to determine whether the load information that the substation can provide meets the preset conditions (which may include the minimum threshold of the remaining load in the substation, the impact limit of the charging task on the load rate of the substation, etc.), that is, whether the charging task can be completed. Exemplarily, the main control unit first evaluates whether the charging pile can meet the charging demand of the vehicle based on the maximum output information of the DC charging pile and the charging parameter interaction information of the vehicle. Then, combined with the load status information of the substation, it is determined whether the substation has enough remaining load to support this charging task without affecting the normal power consumption of other users in the substation. Here, the load status information of the substation includes key indicators such as the total load of the substation, the connected load, and the remaining available load.

[0062] S103, when the load information provided by the station satisfies a preset condition, closing the target charging switch to complete the charging task of the target vehicle.

[0063] When the load information provided by the substation meets the preset conditions, the target switch is closed to complete the charging task of the target vehicle, which may include the following (1) to (3):

[0064] (1) determining charging parameter information based on the main control unit according to the load information that can be provided by the station area; and sending the charging parameter information to the vehicle charging controller through the main control unit via the charging gun interface;

[0065] (2) determining whether the charging parameter information satisfies a preset charging condition based on the vehicle charging controller; if so, closing a first charging switch corresponding to the vehicle charging controller; if not, ending the charging task of the target vehicle and controlling the auxiliary voltage to stop supplying power to the vehicle charging controller;

[0066] (3) After the first charging switch is closed, the device charging controller retrieves whether the vehicle power supply circuit voltage meets the preset voltage requirement; if so, the second charging switch corresponding to the DC charging pile is closed to realize power supply to the target vehicle.

[0067] It is understandable that after the load information provided by the substation meets the preset conditions, the main control unit will comprehensively calculate the optimal charging parameter information based on the current load status of the substation, the maximum output capacity of the DC charging pile, and the charging needs of the vehicle. These parameters may include charging current, charging voltage, charging mode (such as constant current charging, constant voltage charging, or a combination of the two), and estimated charging time. Subsequently, the main control unit sends the calculated charging parameter information to the vehicle charging controller through the charging gun interface.

[0068] After the charging controller in the car receives the charging parameter information, the vehicle charging controller first verifies these parameters to determine whether they meet the preset charging conditions. The preset charging conditions may include the maximum allowable charging current, voltage range, temperature limit, etc. of the vehicle battery to ensure that the charging process does not cause damage to the vehicle battery. If the charging parameter information meets all the preset conditions, the vehicle charging controller will close its corresponding first charging switch and prepare to accept the charging power supply. This step is the confirmation and preparation process of the charging parameters on the vehicle side, which ensures the safety and compatibility of the charging process. At the same time, if the charging parameter information does not meet the preset conditions, the vehicle charging controller will immediately end the charging task of the target vehicle and notify the main control unit through the feedback mechanism. At the same time, it will also control the auxiliary voltage to stop supplying power to the vehicle charging controller to avoid invalid energy consumption and potential safety risks.

[0069] Specifically, after the vehicle charging controller successfully closes the first charging switch, the device charging controller will conduct further checks to ensure that the voltage of the vehicle power supply circuit meets the preset voltage requirements. This step is to verify whether the charging circuit is complete, fault-free, and the voltage is stable within a safe range. Once it is confirmed that the voltage meets the requirements, the device charging controller will close the second charging switch corresponding to the DC charging pile, thereby formally establishing a charging path from the DC charging pile to the vehicle battery. At this point, the DC charging pile will supply power to the target vehicle according to the previously determined charging parameter information and start the charging process.

[0070] In the disclosed embodiment, the system will continuously monitor key information such as the load status of the area, charging parameters, and vehicle battery status during the entire charging process to ensure the safety, stability, and efficiency of the charging process. If any abnormal situation is found, the system will respond quickly and take corresponding protective measures, such as reducing the charging power, interrupting charging, etc., to ensure the safety of the power grid and the vehicle.

[0071] Exemplarily, during the charging process of the target vehicle, in order to ensure the dynamic adjustment and optimization of the charging process, the device charging controller regularly collects the charging status information of the target vehicle according to a preset cycle (such as every second, every minute, etc., set according to specific needs), including but not limited to the current charging current, voltage, power, battery SOC (remaining power percentage) and other key parameters. This information is then sent to the main control unit, which will parse and evaluate it after receiving the charging status information of the target vehicle. Specifically, check whether this information contains current change instructions, which are issued by the vehicle charging controller or the user according to actual needs, and are used to adjust the current size during the charging process, thereby changing the charging power. The current change instruction may come from a variety of situations, such as the user wants to reduce the charging cost by reducing the charging power, or the vehicle charging controller automatically adjusts the charging strategy according to the battery temperature, health status, etc.

[0072] Here, if the main control unit determines that there is indeed a current change instruction, it will adjust the relevant parameters in the charging status information of the target vehicle according to this instruction. Specifically, the main control unit can recalculate and set a suitable charging current value to ensure that the user's charging needs or the optimal charging state of the vehicle are met without exceeding the equipment capabilities and ensuring charging safety. The adjusted charging parameters will be sent to the vehicle charging controller again. After receiving the adjusted charging status information of the target vehicle, the vehicle charging controller will respond to this change and adjust its internal charging control strategy to achieve a change in the charging power of the target vehicle. In this way, it can ensure that the charging process is always maintained in the optimal state, which not only meets the user's charging needs, but also protects the safety and life of the vehicle battery.

[0073] It is understandable that after closing the target charging switch and officially starting the charging process of the target vehicle, the various components of the charging system need to maintain close communication and collaboration to ensure the smooth progress of the charging task and to be able to end the charging safely and orderly when necessary. The following is a detailed description of the two charging stop scenarios (a) and (b):

[0074] (a) when the main control unit receives a stop charging instruction issued by the device charging controller, the main control unit sends the stop charging instruction to the vehicle charging controller; after the vehicle charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle; or,

[0075] (b) When the main control unit receives a stop charging instruction issued by the vehicle charging controller, the main control unit sends the stop charging instruction to the device charging controller; after the device charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle.

[0076] Specifically, when the main control unit receives a stop charging request from the device charging controller, it processes the request and sends a stop charging instruction to the vehicle charging controller. After receiving the stop charging instruction, the vehicle charging controller disconnects the second charging switch to cut off the charging circuit. In addition, the vehicle charging controller also controls the auxiliary power supply to stop supplying power to other related devices to further save energy and reduce safety risks. In another case, the vehicle charging controller may also actively issue a stop charging request based on the status of the vehicle battery (such as full charge, battery overheating, fault detection, etc.) or user operation (such as in-vehicle button operation, mobile phone APP remote control, etc.). When the vehicle charging controller sends a stop charging instruction to the main control unit, the main control unit will quickly respond to the request and forward the stop charging instruction to the device charging controller. After receiving the stop charging instruction, the device charging controller will follow a process similar to that in (a), first disconnecting the second charging switch to cut off the charging circuit, and then controlling the auxiliary power supply to stop supplying power. In this way, it can be ensured that the charging task can be safely and reliably terminated whenever necessary, thereby ensuring the safety and stable operation of users, vehicles and the entire charging facility.

[0077] The charging current adaptive control method provided in the embodiment of the present disclosure does not change the structure of the DC charging pile. On the basis of not changing the internal structure of the original charging pile, the orderly charging control device can be used to control the amount of electric energy transmitted during the charging process; when receiving the current adjustment instruction, the main control unit is used to adjust the charging current of the DC charging pile, adjust the charging power, and then change the load proportion of the DC charging pile in the station area. In this way, by real-time monitoring of the station area load status and charging demand, the charging power is dynamically adjusted, the load management is optimized, the charging efficiency is improved, the energy waste is reduced, and the equipment safety is guaranteed, thereby improving the user's charging experience.

[0078] At the same time, if the present disclosure is applied to the distribution transformer substation where the operating piles and stock charging piles have been installed, the unified dispatch of the load and charging current in the distribution substation can be realized by combining the communication means, and the active and orderly charging can be realized, forming a new power consumption mode of "grid-load interaction" and "multi-load coordination", reducing network loss, improving the quality of electric energy, and ensuring the safe operation of the power grid. If the present disclosure is applied to the substation with limited distribution transformer capacity, more DC charging piles can be over-equipped in the substation to achieve "one pile for each parking space", so that users can choose parking spaces more conveniently, enhance the user experience of electric vehicles, and improve the user satisfaction of power supply companies. If the present disclosure is applied to the community where the distribution line is old, the charging current of the high-power charging pile can be controlled below the maximum current of the wiring to achieve limited current charging, and then high-load DC charging piles can be installed without upgrading the wiring capacity. The safety is greatly improved by monitoring the charging status of the charging piles, so that low-carbon travel can benefit a wider range of families and help my country's "dual carbon" national strategy.

[0079] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0080] Based on the same inventive concept, the disclosed embodiment also provides an orderly charging control device for executing a charging current adaptive control method without changing the structure of a DC charging pile. The device includes a DC charging pile, a charging pile interface, a main control unit, a charging gun interface, and a charging device management device; the DC charging pile includes a power supply, an auxiliary power supply, and a device charging controller; the charging device management device includes a rechargeable energy storage system and a vehicle charging controller;

[0081] The power supply is connected to the rechargeable energy storage system through the first charging pile switch via the first charging pile interface, the first charging gun interface and the charging device switch;

[0082] The device charging controller is connected to the main control unit through the second charging pile interface, and the main control unit is connected to the vehicle charging controller through the second charging gun interface; so as to realize information interaction between the device charging controller and the main control unit and between the vehicle charging controller and the main control unit;

[0083] The device charging controller is also connected to the first voltage detection point through the first protection resistor to detect the charging demand of the target vehicle; and is connected to the second protection resistor and the third protection resistor via the third charging pile interface and the third charging gun interface respectively and then grounded;

[0084] The auxiliary power supply is connected to the vehicle charging controller through the second charging pile switch via the fourth charging pile interface and the fourth charging gun interface, so as to realize the use of the auxiliary power supply to power the vehicle charging controller;

[0085] The vehicle charging controller is also connected to the second voltage detection point through a fourth protection resistor to detect the voltage of the vehicle charging controller; and is connected to the fifth protection resistor and then grounded.

[0086] Based on the same technical concept, the embodiment of the present disclosure also provides a computer device. Figure 3 , which is a schematic diagram of the structure of a computer device 300 provided in an embodiment of the present disclosure, including a processor 301, a memory 302, and a bus 303. The memory 302 is used to store execution instructions, including a memory 3021 and an external memory 3022; the memory 3021 is also called an internal memory, which is used to temporarily store the operation data in the processor 301 and the data exchanged with the external memory 3022 such as a hard disk. The processor 301 exchanges data with the external memory 3022 through the memory 3021.

[0087] In the embodiment of the present application, the memory 302 is specifically used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 301. That is, when the computer device 300 is running, the processor 301 communicates with the memory 302 through the bus 303, so that the processor 301 executes the application code stored in the memory 302, and then executes the method described in any of the above embodiments.

[0088] Among them, the memory 302 can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable read-only memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

[0089] The processor 301 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0090] It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the computer device 300. In other embodiments of the present application, the computer device 300 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0091] The present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the charging current adaptive control method without changing the structure of the DC charging pile described in the above method embodiment are executed. The storage medium can be a volatile or non-volatile computer-readable storage medium.

[0092] The embodiments of the present disclosure also provide a computer program product, which carries a program code. The instructions included in the program code can be used to execute the steps of the charging current adaptive control method without changing the structure of the DC charging pile as described in the above method embodiment. For details, please refer to the above method embodiment, which will not be repeated here.

[0093] The computer program product may be implemented in hardware, software or a combination thereof. In one optional embodiment, the computer program product is implemented as a computer storage medium. In another optional embodiment, the computer program product is implemented as a software product, such as a software development kit (SDK).

[0094] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. In the several embodiments provided in the present disclosure, it should be understood that the disclosed system and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0095] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0096] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0097] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0098] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, rather than to limit them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present disclosure, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A charging current adaptive control method without changing the structure of a DC charging pile, characterized in that: include: Based on the orderly charging control device, it is detected whether the target vehicle has a charging demand; wherein the orderly charging control device includes a DC charging pile, a main control unit, and a charging equipment management device; the DC charging pile includes an equipment charging controller, and the charging equipment management device includes a vehicle charging controller; When the DC charging pile detects that the target vehicle has a charging demand, the load status information of the area is obtained, and the load information that can be provided by the area is determined based on the load status information of the area, the charging pile interaction information corresponding to the device charging controller, and the charging parameter interaction information corresponding to the vehicle charging controller; and the load information that can be provided by the area is sent to the main control unit; When the load information provided by the station area meets the preset conditions, the target charging switch is closed to complete the charging task of the target vehicle; Wherein, during the charging process of the target vehicle, the device charging controller sends the charging status information of the target vehicle to the main control unit according to a preset period; and based on the main control unit, it is determined whether there is a current change instruction in the charging status information of the target vehicle; if so, the main control unit adjusts the charging status information of the target vehicle according to the current change instruction, and sends the adjusted charging status information of the target vehicle to the vehicle charging controller to change the charging power of the target vehicle.

2. The method according to claim 1, characterized in that The orderly charging control device also includes a charging pile interface and a charging gun interface; The charging pile interface is connected to the DC charging pile and the main control unit respectively, and is used to realize information transmission between the DC charging pile and the main control unit; The charging gun interface is connected to the charging equipment management device and the main control unit respectively, and is used to realize information transmission between the charging equipment management device and the main control unit.

3. The method according to claim 2, characterized in that The DC charging pile also includes an auxiliary power supply; before obtaining the load status information of the station area, it includes: The vehicle charging controller is powered by the auxiliary power supply to obtain charging pile interaction information; and the charging pile interaction information is sent to the main control unit via the charging pile interface by the device charging controller; After the vehicle charging controller is powered by the auxiliary power supply, it is determined whether the voltage of the vehicle charging controller reaches a preset value. If so, the charging parameter interaction information is sent to the main control unit via the charging gun interface through the vehicle charging controller.

4. The method according to claim 3, characterized in that After the device charging controller sends the charging pile interaction information to the main control unit via the charging pile interface, the method includes: The main control unit sends the charging pile interaction information to the vehicle charging controller through the charging gun interface; Correspondingly, after the vehicle charging controller sends the charging parameter interaction information to the main control unit via the charging gun interface, it includes: The main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface.

5. The method according to claim 4, characterized in that After the main control unit sends the charging parameter interaction information to the device charging controller through the charging pile interface, it includes: According to the charging parameter interaction information, the maximum output information of the DC charging pile is determined based on the device charging controller; the device charging controller sends the maximum output information of the DC charging pile to the main control unit through the charging pile interface; Accordingly, the determining that the load information that can be provided by the area based on the area load status information, the charging pile interaction information corresponding to the device charging controller, and the charging parameter interaction information corresponding to the vehicle charging controller includes: The load information that the substation can provide is determined based on the substation load status information, the maximum output information of the DC charging pile, and the charging parameter interaction information.

6. The method according to claim 3, characterized in that The target charging switch includes a first charging switch and a second charging switch; when the load information provided by the station area meets the preset conditions, closing the target charging switch includes: Determine charging parameter information based on the main control unit according to the load information that can be provided by the station area; and send the charging parameter information to the vehicle charging controller through the charging gun interface by the main control unit; Based on the vehicle charging controller, determine whether the charging parameter information meets the preset charging condition; if so, close the first charging switch corresponding to the vehicle charging controller; if not, end the charging task of the target vehicle, and control the auxiliary voltage to stop supplying power to the vehicle charging controller; After the first charging switch is closed, the device charging controller retrieves whether the vehicle power supply circuit voltage meets the preset voltage requirement; if so, the second charging switch corresponding to the DC charging pile is closed to realize power supply to the target vehicle.

7. The method according to claim 6, characterized in that After closing the target charging switch, the method further comprises: When the main control unit receives a stop charging instruction issued by the device charging controller, the main control unit sends the stop charging instruction to the vehicle charging controller; after the vehicle charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle; or, When the main control unit receives a stop charging instruction issued by the vehicle charging controller, the main control unit sends the stop charging instruction to the device charging controller; after the device charging controller receives the stop charging instruction, the second charging switch is disconnected, and the auxiliary power supply is controlled to stop supplying power to the vehicle charging controller to complete the charging task of the target vehicle.

8. An orderly charging control device, characterized in that: Used to execute the charging current adaptive control method without changing the structure of a DC charging pile as described in any one of claims 1 to 7, the device includes a DC charging pile, a charging pile interface, a main control unit, a charging gun interface and a charging equipment management device; the DC charging pile includes a power supply, an auxiliary power supply and a device charging controller; the charging equipment management device includes a rechargeable energy storage system and a vehicle charging controller; The power supply is connected to the rechargeable energy storage system through the first charging pile switch via the first charging pile interface, the first charging gun interface and the charging device switch; The device charging controller is connected to the main control unit through the second charging pile interface, and the main control unit is connected to the vehicle charging controller through the second charging gun interface; so as to realize information interaction between the device charging controller and the main control unit and between the vehicle charging controller and the main control unit; The device charging controller is also connected to the first voltage detection point through a first protection resistor to detect the charging demand of the target vehicle; The third charging pile interface and the third charging gun interface are respectively connected to the second protection resistor and the third protection resistor and then grounded; The auxiliary power supply is connected to the vehicle charging controller through the second charging pile switch via the fourth charging pile interface and the fourth charging gun interface, so as to realize the use of the auxiliary power supply to power the vehicle charging controller; The vehicle charging controller is also connected to the second voltage detection point through a fourth protection resistor to detect the voltage of the vehicle charging controller; It is connected to the fifth protection resistor and then grounded.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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