Distributed control method and controller suitable for electric vehicle charging

Abstract

The invention provides a distributed control method and controller suitable for electric vehicle charging, and the method comprises the steps: correcting the system time, and carrying out the system initialization; performing circuit detection on the current charging pile to obtain circuit data of the charging pile; the circuit data comprises voltage, current, electric quantity and charging pile state; obtaining load data in a power grid area, and generating a control instruction for the charging pile in combination with the circuit data of the charging pile; and controlling the power and circuit on-off of the corresponding charging pile based on the control instruction. According to the method and the device, the load pressure of the transformer area can be effectively relieved, the use efficiency of the charging pile is remarkably improved on the premise that the actual charging experience of a user is not influenced, and the problem that the load impact of the transformer area is difficult to relieve in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a distributed control method and controller suitable for charging electric vehicles. Background Art

[0002] Currently, electric vehicles are experiencing a new round of revolution. As the infrastructure of new energy vehicles, electric vehicle charging piles, however, their number and layout restrict the development of new energy vehicles. In particular, large-scale charging of electric vehicles at night has caused load shocks to power grids in residential areas, rural areas, towns, etc. The stable operation of the power grid faces new challenges. Therefore, orderly charging of electric vehicles is imminent.

[0003] At the same time, there are numerous brands of charging piles, with significant differences in their internal construction. Control methods can vary between brands and even batches. Compared to public charging piles, private charging piles cannot receive dispatch instructions from the power grid and cannot execute orderly charging commands. Modifying private charging piles also incurs additional communication costs, and users may even prohibit modifications. Therefore, to address this need, establishing efficient, safe, intelligent, and controlled electric vehicle charging piles requires a distributed, highly versatile, and user-insensitive orderly charging controller that is compatible with multiple brands of charging piles.

[0004] There is currently no effective solution to the problem of difficulty in alleviating load shock in substations in the existing technology. Summary of the Invention

[0005] The present invention provides a distributed control method and controller suitable for charging electric vehicles, which are used to solve the defect in the prior art that it is difficult to alleviate the load impact of the substation, and realize the orderly charging of electric vehicles.

[0006] In a first aspect, the present invention provides a distributed control method applicable to electric vehicle charging, comprising: Correct the system time and initialize the system; Perform circuit detection on the current charging pile to obtain circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Obtaining load data within the power grid area, and generating control instructions for the charging pile in combination with circuit data of the charging pile; The power and circuit on / off of the corresponding charging pile are controlled based on the control instruction.

[0007] According to a distributed control method for electric vehicle charging provided by the present invention, before correcting the system time and performing system initialization, the method includes: performing a program self-check; The program self-test includes power supply self-test, memory self-test, port input and output self-test, clock and timing self-test, system bus self-test and software self-test.

[0008] According to a distributed control method for electric vehicle charging provided by the present invention, load data within a power grid area is obtained, and control instructions for the charging pile are generated in combination with circuit data of the charging pile, including: Obtain load data within the power grid area; the load data includes current area capacity, ordinary residential electricity consumption, and electric vehicle charging; Determining the power of the charging pile based on circuit data of the charging pile; Determining the overall load of the power grid area based on the power of all the charging piles in the power grid area and the load data; A control instruction for the charging pile is generated according to the overall load.

[0009] According to a distributed control method for electric vehicle charging provided by the present invention, a control instruction for the charging pile is generated based on the overall load, including: if the current overall load exceeds 90% of the transformer capacity of the power grid area, a charging pile delayed start instruction is generated; the charging pile delayed start instruction is activated after the overall load drops to 80% of the transformer capacity of the power grid area; If the current overall load is between 80% and 90% of the transformer capacity of the power grid station, a charging pile power reduction instruction is generated.

[0010] According to a distributed control method for electric vehicle charging provided by the present invention, a circuit detection is performed on the current charging pile. After obtaining the circuit data of the charging pile, if it is determined that an overcurrent fault occurs in the charging pile, the circuit of the charging pile is disconnected.

[0011] In a second aspect, the present invention further provides a distributed controller suitable for electric vehicle charging, used in the distributed control method suitable for electric vehicle charging described in the first aspect, wherein the controller is arranged between the distribution network and the charging pile and connected to the dispatching center; the types of the charging piles include AC piles, DC piles, three-phase piles and single-phase piles; the controller includes: A power supply module, used to supply power to the controller; A power interface, used to connect to the distribution network, draw power from the distribution network, and detect the voltage and current of the distribution network; A memory module, used for storing an internal program of the controller; A crystal oscillator, used for communicating with the dispatch center and correcting the system time; The current detection module and the input / output voltage detection module are used to perform circuit detection on the current charging pile and obtain the circuit data of the charging pile; An ARM processor, configured to complete system initialization of the controller, receive circuit data of the charging pile, and upload the data to the dispatch center; A relay is used to control the on / off of the circuit of the charging pile.

[0012] According to a distributed controller suitable for charging electric vehicles provided by the present invention, the power interface has an input side and an output side, and both the input side and the output side of the power interface are in a four-pin form; The outgoing line side of the power interface is hard-connected to the relay, and the control interface of the relay is connected to the ARM processor.

[0013] According to a distributed controller suitable for charging electric vehicles provided by the present invention, the current detection module and the input / output voltage detection module are both connected to the power interface, and the connection form is a soft connection.

[0014] According to a distributed controller suitable for charging electric vehicles provided by the present invention, the internal program stored in the memory is used to determine the execution order of each module inside the controller.

[0015] According to a distributed controller suitable for charging electric vehicles provided by the present invention, the controller includes a communication module therein, and the communication module is used for communication between the ARM processor and the charging pile.

[0016] In a third aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the distributed control method for electric vehicle charging as described in the first aspect above is implemented.

[0017] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the distributed control method for electric vehicle charging as described in the first aspect above.

[0018] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the distributed control method for electric vehicle charging as described in the first aspect above.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The distributed control method for electric vehicle charging provided by the present invention can effectively alleviate the load pressure in the substation by integrating the power data of the charging pile and the substation load data, and remotely monitoring and adjusting the power and circuit of the charging pile according to the integration results. Without affecting the actual charging experience of users, the utilization efficiency of the charging pile is significantly improved, and the problem of difficulty in alleviating the substation load impact existing in the existing related technologies is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a flow chart of a distributed control method applicable to electric vehicle charging provided by the present invention; Figure 2 This is a structural block diagram of a distributed controller suitable for electric vehicle charging provided by the present invention; Figure 3 This is a schematic diagram of the use process of the distributed controller in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The present invention provides a distributed control method suitable for charging electric vehicles, which is applied to a distributed controller. Figure 1 This is a flow chart of a distributed control method for electric vehicle charging provided by the present invention. Figure 1 As shown, the method includes the following steps: Step S101, calibrate the system time and initialize the system; Step S102: Perform circuit detection on the current charging pile to obtain circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Step S103: Obtain load data within the power grid area and generate control instructions for the charging piles in combination with circuit data of the charging piles; Step S104: Control the power and circuit on / off of the corresponding charging pile based on the control instruction.

[0024] Exemplarily, first, the system time is corrected, and the system time is updated every 15 minutes. Then, the system is initialized, and the relevant data of voltage detection and current detection are initially reset to zero. Then, the circuit of the current charging pile is detected to obtain the circuit data of the charging pile. Then, the load data in the power grid area is obtained, and the control instructions for the charging pile are generated in combination with the circuit data of the charging pile. Finally, the power of the charging pile is regulated according to the control instructions for the charging pile, and the on and off of the charging pile circuit is controlled. In the above process, the power data of the charging pile and the area load data are integrated, and the power and circuit of the charging pile are remotely monitored and adjusted according to the integration results, which can effectively alleviate the area load pressure. Without affecting the actual charging experience of users, the utilization efficiency of the charging pile is significantly improved, solving the problem of difficulty in alleviating the area load impact in the existing related technologies.

[0025] In some embodiments, step S101, correcting the system time and before performing system initialization, includes: performing a program self-test; the program self-test includes a power supply self-test, a memory self-test, a port input and output self-test, a clock and timing self-test, a system bus self-test, and a software self-test.

[0026] The following is a partial explanation of several self-test contents: Power supply self-test: Check whether the power supply chip is working properly, including voltage stability and power connection status; Memory self-test: Check whether the controller's memory and storage devices (such as solid-state drives and flash memories) can access and write data normally; Port input and output self-test: Check whether the various input and output ports of the controller (such as USB ports, RS485 ports, general-purpose input / output ports (GPIO), power measurement ports) are working properly; Clock and timing self-test: Check the controller's clock, timing system, and system time to ensure clock accuracy and system time accuracy, thereby ensuring accurate scheduling execution; System bus self-test: Check the stability and normality of the system bus and data communication, including communication between different modules within the controller, including but not limited to synchronous serial communication protocol (Serial Peripheral Interface, SPI), I2C communication protocol (Inter-Integrated Circuit), PLC, 4G, 5G, Ethernet, etc.; Software self-test: Run the preset software self-test program to ensure that the operating system and related drivers can be loaded and run normally.

[0027] The next step will be taken only after all the above self-test processes are passed. If the self-test fails, the error code will be sent to the dispatch center through the communication module. The dispatch center sends an instruction to the receiving end of the communication module and issues a restart instruction to repeat the self-test. If it fails again, the failure information will be transmitted to the dispatch center. Finally, the distributed controller stops running and enters a locked state, waiting for logistics maintenance personnel to arrive at the site for maintenance. However, during this process, the power circuit is not disconnected, which does not affect the normal use of the user. It is just that the functions of orderly charging and controlling the charging pile cannot be realized normally.

[0028] In some embodiments, step S103, obtaining load data within the power grid area, and generating control instructions for the charging piles in combination with the circuit data of the charging piles, includes: obtaining load data within the power grid area; the load data includes the current area capacity, ordinary residential electricity consumption, and electric vehicle charging; determining the power of the charging pile based on the circuit data of the charging pile; determining the overall load of the power grid area based on the power and load data of all charging piles in the power grid area; and generating control instructions for the charging piles based on the overall load.

[0029] Specifically, control instructions for the charging pile are generated according to the overall load, including: if the current overall load exceeds 90% of the transformer capacity of the power grid area, a charging pile delayed start instruction is generated; the start time of the charging pile delayed start instruction is after the overall load drops to 80% of the transformer capacity of the power grid area; if the current overall load is between 80%-90% of the transformer capacity of the power grid area, a charging pile power reduction instruction is generated.

[0030] After completing system initialization for each module, the voltage and current detection are reset to zero. Voltage and current detection is then performed, and communication is established with the charging pile. The current grid output power is calculated, and data such as voltage, current, power consumption, and charging pile status are transmitted to the dispatch center using the communication module. The dispatch center calculates various data such as the current substation capacity, ordinary residential electricity consumption, and electric vehicle charging, and issues a control instruction for the charging pile to reduce or increase power. This control instruction is then sent back to the distributed controller, which communicates with the charging pile. The charging pile then increases or decreases the duty cycle of the pulse-width modulation wave, thereby increasing or decreasing the charging pile's output power.

[0031] In some embodiments, the current charging pile is tested for circuit data. If an overcurrent fault is detected, the circuit of the charging pile is disconnected, thereby protecting the charging pile and the electric vehicle. Furthermore, a temperature detection device can be provided. If the temperature of the charging pile exceeds a safety threshold during use, the circuit of the charging pile can be directly disconnected, further enhancing the protection of the charging pile and the electric vehicle.

[0032] The present invention also provides a distributed controller suitable for electric vehicle charging. The distributed controller suitable for electric vehicle charging provided by the present invention is described below. The distributed controller suitable for electric vehicle charging described below and the distributed control method suitable for electric vehicle charging described above can be used in correspondence with each other. The controller is arranged between the distribution network and the charging pile and is connected to the dispatching center, which can provide users with a seamless charging experience. The types of charging piles include AC piles, DC piles, three-phase piles, and single-phase piles. That is, the distributed controller can be applied to a variety of different types of charging piles and has good versatility. Figure 2 This is a block diagram of the distributed controller for electric vehicle charging provided by the present invention, such as Figure 2 As shown, the controller includes: The 12V power supply module is used to power the controller. It is suitable for various specifications of AC and DC power, such as 220V AC, 380V AC, and 750V DC. After rectification, chopping, and filtering, the 12V DC power provides a stable power supply for the controller. Power interface, used to connect to the distribution network, draw power from the distribution network, and detect the voltage and current of the distribution network; Memory module E2ROM, used to store the internal program of the controller; Crystal oscillator, used to communicate with the dispatch center and correct system time; crystal oscillator chips include active and passive crystal oscillators, providing external precise clock signals for the ARM processor; The current detection module and the input / output voltage detection module are used to detect the circuit of the current charging pile and obtain the circuit data of the charging pile; ARM processor, used to complete the controller system initialization, receive the circuit data of the charging pile, and upload it to the dispatch center; Relay 1 / 2 / 3 / 4 is used to control the on / off of the charging pile circuit.

[0033] The modules inside the controller are divided into two categories: high-voltage and low-voltage. The power interface is a high-voltage unit, and the rest are low-voltage units. High-voltage isolation measures are required between the two to protect the low-voltage units from interference and damage by the high-voltage units.

[0034] In some embodiments, the power interface has an input side and an output side, and both the input side and the output side of the power interface are in the form of four pins, corresponding to the A phase, B phase, C phase and neutral wire in the three-phase four-wire system, respectively. The four pins are compatible with 220V AC power supply, that is, only any one phase and the neutral wire in the three-phase power are connected. The output side of the power interface is hard-connected to the relay, and the control interface of the relay is connected to the ARM processor. Specifically, the four wires on the output side of the power interface, A, B, C, and zero are connected one by one to the strong power interfaces of relays 1, 2, 3, and 4, and the control interface of the relay is connected to the ARM processor.

[0035] In some of the embodiments, the current detection module and the input / output voltage detection module are both connected to the power interface, and the connection form is a soft connection. The current and voltage are mainly detected through Hall sensors and resistor voltage dividers, and the detected data are fed back to the ARM processor.

[0036] The distributed controller's power interfaces are: a grid interface and a charging pile interface. The grid interface receives power and detects grid voltage and current. A relay connected to the power supply circuit can disconnect the charging pile in an emergency. The charging pile interface connects the controller to the charging pile and detects basic information such as output voltage and current, as well as power statistics. Therefore, the controller can be installed upstream of the charging pile, ensuring user-unaware functionality.

[0037] The controllers can communicate with each other and exchange information using 5G / 4G communication methods. During the scheduling process, a cluster or an area participates in the overall scheduling of the power grid. Self-negotiation scheduling is carried out within the cluster. If one electric vehicle increases the supply current, another reduces the charging current. The judgment is based on the current power of the electric vehicle.

[0038] This distributed controller records the start and end time of electric vehicle charging, charging current, charging voltage, total charge, and charging pile status, including but not limited to power and efficiency. It transmits this data to the ARM processor, substations, and the dispatch center. While acquiring the measurement data, the controller can also calculate these parameters, demonstrating edge computing capabilities. The dispatch center can then determine whether the controller should participate in grid dispatch and issue instructions to the controller.

[0039] There are two control modes: dispatch center control and self-control. Dispatch center control has a higher priority than self-control.

[0040] Figure 3 FIG. 1 is a flow chart of the use of a distributed controller in an embodiment of the present invention. Figure 3 As shown in the figure, when the power interface is correctly connected, the distributed controller draws power from the distribution network side, adapts to different voltage levels, and obtains a 12V DC bus voltage after processing by the power module. The 12V is converted into 3.3V, 5V, 1.8V and other multi-voltage DC voltages through the DC / DC voltage conversion inside the controller to power all modules inside the distributed controller. Different voltage levels are started in sequence according to different timings.

[0041] In some embodiments, the internal program stored in the memory is used to determine the execution order of each module within the controller. The core information within the E2ROM is the controller number, network IP address, installation location, whether the corresponding charging pile contains a communication module, and the communication method for controlling the charging pile. All of the above information can be changed through communication methods such as 4G, 5G, and Ethernet, but its control authority should be the highest. After the distributed controller is powered normally, the first step is to read the program inside the E2ROM, read the boot program, determine the order in which various modules are started, read the controller number, address, type of corresponding charging pile, whether the charging pile contains a communication module, determine the communication method to be used, etc.

[0042] After reading the contents of E2ROM, the controller begins to execute self-test programs, including but not limited to: power self-test, memory self-test, port input / output self-test, clock and timing self-test, system bus self-test, and software self-test. The following is a partial explanation of several self-test contents: Power self-test: Checks whether the power chip is working properly, including voltage stability and power connection status; Memory self-test: Checks whether the controller's memory and storage devices (such as solid-state drives and flash memories) can access and write data normally; Port input / output self-test: Checks whether the controller's various input and output ports (such as USB ports, RS485 ports, GPIO ports, and power measurement ports) are working properly; Clock and timing self-test: Checks the controller's clock, timing system, and system time to ensure clock accuracy and system time accuracy, thereby ensuring accurate scheduling execution; System bus self-test: Checks the stability and normality of the system bus and data communications, including communication between different modules within the controller, including but not limited to SPI, I2C, PLC, 4G, 5G, Ethernet, etc.; Software self-test: Runs the preset software self-test program to ensure that the operating system and related drivers can load and run normally.

[0043] The above self-test process must pass all before the next step is performed. If the self-test fails after reading the information from E2ROM, the error code will be sent to the dispatch center through the communication module. The dispatch center sends an instruction to the receiving end of the communication module and issues a restart instruction to read the E2ROM content again for repeated self-test. If it fails again, the failure information will be transmitted to the dispatch center. Finally, the distributed controller stops running and enters a locked state, waiting for logistics maintenance personnel to arrive at the site for maintenance. However, during this process, the power circuit is not disconnected, and the main power connection phases A, B, C, and zero are all kept connected, which does not affect the normal use of the user. It is just that the functions of orderly charging and controlling the charging pile cannot be realized normally.

[0044] After the self-test is successful, the external crystal oscillator starts normally and communicates with the dispatch center to correct the system time. The latest system time must be updated to the dispatch center every 15 minutes to ensure the accuracy of the system time and correct the time error caused by the crystal oscillator jitter time. The system time is based on the dispatch center time.

[0045] In some embodiments, the controller includes an internal communication module for communication between the ARM processor and the charging pile. The communication module supports multiple communication protocols and is compatible with charging piles of different brands. The internal communication between the ARM processor and the communication module uses the QSPI communication protocol. The communication module is responsible for receiving external signals and transmitting signals to the ARM processor, acting as a routing function. After the crystal oscillator is activated, the ARM processor starts normally, first completing system initialization of each module, initially returning the voltage and current detection to zero, starting the input and output voltage detection and current detection of the external power interface, communicating with the charging pile, calculating the current grid output power, and transmitting the above data (voltage, current, power, charging pile status, etc.) to the dispatch center using the communication module.

[0046] The dispatch center calculates different load data such as the current substation capacity, ordinary residential electricity consumption, and electric vehicle charging, and issues instructions for charging piles to reduce or increase power. The instructions are sent back to the distributed controller. The distributed control uses the communication method solidified in the E2ROM to communicate with the charging pile. The corresponding charging pile increases the duty cycle of the pulse width modulation wave to increase or decrease the output power of the charging pile.

[0047] When the load on the substation is too large, the dispatch center can send a command to cut off the output of the charging pile and send it to the distributed charging controller. The controller controls the GPIO signal and then controls relays 1 / 2 / 3 / 4. Opening the relay stops the output of the power side output port. If you want to start charging the charging pile, you only need to send a signal to close the relay.

[0048] The dispatch center can also send a command to delay the start of the charging pile, and use the system time inside the distributed controller to achieve timed start.

[0049] During the charging process of electric vehicles, when overvoltage, overcurrent and other conditions are detected, the distributed control can independently execute the action of opening the relay, thereby achieving the purpose of protecting the charging pile and the electric vehicle.

[0050] When the charging pile detects that the electric vehicle is fully charged, the distributed controller is in standby mode, waiting for the next charging event.

[0051] The distributed controller controls the charging piles through various methods, including RS485, power line communication (PLC), 4G communication, Bluetooth communication, and Ethernet. Traditional charging piles that do not support the Open Communication Control Protocol (OCCP) are controlled using the RS485 bus and power line communication. Charging piles that support the OCCP protocol are controlled by issuing commands using 4G communication, Bluetooth communication, and Ethernet, such as scheduled charging, reduced-rate charging, and delayed start.

[0052] Figure 4 An example of a physical structure diagram of an electronic device is shown below. Figure 4 As shown, the electronic device may include: a processor 401, a communications interface 402, a memory 403, and a communication bus 404, wherein the processor 401, the communications interface 402, and the memory 403 communicate with each other via the communication bus 404. The processor 401 may call the logic instructions in the memory 403 to execute a distributed control method applicable to electric vehicle charging, the method including: Correct the system time and initialize the system; Perform circuit detection on the current charging pile to obtain the circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Obtain load data within the power grid area and generate control instructions for the charging piles based on the circuit data of the charging piles; Control the power and circuit on / off of the corresponding charging pile based on the control instructions.

[0053] Furthermore, the logic instructions in the aforementioned memory 403 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0054] On the other hand, the present invention further provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the distributed control method for electric vehicle charging provided by the above methods, which includes: Correct the system time and initialize the system; Perform circuit detection on the current charging pile to obtain the circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Obtain load data within the power grid area and generate control instructions for the charging piles based on the circuit data of the charging piles; Control the power and circuit on / off of the corresponding charging pile based on the control instructions.

[0055] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the distributed control method for electric vehicle charging provided by the above methods is implemented, and the method includes: Correct the system time and initialize the system; Perform circuit detection on the current charging pile to obtain the circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Obtain load data within the power grid area and generate control instructions for the charging piles based on the circuit data of the charging piles; Control the power and circuit on / off of the corresponding charging pile based on the control instructions.

[0056] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0057] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A distributed control method for charging electric vehicles, characterized in that: include: Correct the system time and initialize the system; Perform circuit detection on the current charging pile to obtain circuit data of the charging pile; the circuit data includes voltage, current, power and charging pile status; Obtaining load data within the power grid area, and generating control instructions for the charging pile in combination with circuit data of the charging pile; The power and circuit on / off of the corresponding charging pile are controlled based on the control instruction.

2. The distributed control method for electric vehicle charging according to claim 1, characterized in that: Correct the system time and initialize the system, including: Perform program self-test; the program self-test includes power supply self-test, memory self-test, port input and output self-test, clock and timing self-test, system bus self-test and software self-test.

3. The distributed control method for electric vehicle charging according to claim 1, characterized in that: Obtaining load data within the power grid area and generating control instructions for the charging pile in combination with circuit data of the charging pile, including: Obtain load data within the power grid area; the load data includes current area capacity, ordinary residential electricity consumption, and electric vehicle charging; Determining the power of the charging pile based on circuit data of the charging pile; Determining the overall load of the power grid area based on the power of all the charging piles in the power grid area and the load data; A control instruction for the charging pile is generated according to the overall load.

4. The distributed control method for electric vehicle charging according to claim 3, characterized in that: Generating a control instruction for the charging pile according to the overall load includes: If the current overall load exceeds 90% of the transformer capacity of the power grid area, a delayed start instruction for the charging pile is generated; the activation time of the delayed start instruction for the charging pile is after the overall load drops to 80% of the transformer capacity of the power grid area; If the current overall load is between 80% and 90% of the transformer capacity of the power grid station, a charging pile power reduction instruction is generated.

5. The distributed control method for electric vehicle charging according to claim 1, characterized in that: A circuit test is performed on the current charging pile to obtain circuit data of the charging pile. If it is determined that an overcurrent fault occurs in the charging pile, the circuit of the charging pile is disconnected.

6. A distributed controller suitable for electric vehicle charging, used to implement the distributed control method suitable for electric vehicle charging according to any one of claims 1 to 5, characterized in that: The controller is arranged between the distribution network and the charging pile and is connected to the dispatching center; the types of the charging piles include AC piles, DC piles, three-phase piles and single-phase piles; the controller includes: A power supply module, used to supply power to the controller; A power interface, used to connect to the distribution network, draw power from the distribution network, and detect the voltage and current of the distribution network; A memory module, used for storing an internal program of the controller; A crystal oscillator, used for communicating with the dispatch center and correcting the system time; The current detection module and the input / output voltage detection module are used to perform circuit detection on the current charging pile and obtain the circuit data of the charging pile; An ARM processor, configured to complete system initialization of the controller, receive circuit data of the charging pile, and upload the data to the dispatch center; A relay is used to control the on / off of the circuit of the charging pile.

7. The distributed controller for charging electric vehicles according to claim 6, characterized in that: The power interface has an input side and an output side, and both the input side and the output side of the power interface are in a four-pin form; The outgoing line side of the power interface is hard-connected to the relay, and the control interface of the relay is connected to the ARM processor.

8. The distributed controller for charging electric vehicles according to claim 6, characterized in that: The current detection module and the input / output voltage detection module are both connected to the power interface, and the connection form is a soft connection.

9. The distributed controller for charging electric vehicles according to claim 6, characterized in that: The internal program stored in the memory is used to determine the execution order of each module inside the controller.

10. The distributed controller for charging electric vehicles according to claim 6, characterized in that: The controller includes a communication module, which is used for communication between the ARM processor and the charging pile.

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