Charging equipment charging control method and system

Abstract

The invention provides a charging control method and system for charging equipment, which are used for carrying out charging current distribution on a charging network formed by a plurality of charging equipment, each charging equipment is single-phase charging equipment or three-phase charging equipment, so that the charging network is one or a combination of the single-phase charging equipment and the three-phase charging equipment. The charging control method for the charging equipment comprises the following steps: acquiring phase line information connected with each piece of charging equipment from each piece of charging equipment through the communication connection; determining the number of charging devices connected to each phase line based on the phase line information; and based on the number of the charging devices connected to the corresponding phase line and a preset phase line current threshold value of the corresponding phase line, distributing a charging current to the charging devices connected to the corresponding phase line, and sending a charging current distribution value to the charging devices connected to the corresponding phase line. Therefore, accurate and flexible charging current distribution can be realized, and the technical problem that hybrid networking of single-phase charging equipment and three-phase charging equipment lacks charging control capability in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of charging control technology, and in particular to a charging control method and system for charging equipment. Background Art

[0002] With the increasing popularity of new energy electric vehicles, the number of charging stations is increasing year by year. The parallel use of multiple charging stations, particularly in some homes and public charging stations, can lead to insufficient power supply capacity, uneven current distribution, and device overload. As the number of charging devices increases, how to efficiently utilize power resources and avoid overloads and power waste caused by improper current distribution becomes a pressing technical challenge.

[0003] In existing technologies, many charging stations use traditional current distribution methods. Although they can provide a certain degree of current balance, they are often unable to flexibly cope with multi-charging device environments. In particular, in a mixed network configuration of single-phase and three-phase charging devices, existing solutions fail to provide sufficient charging control capabilities.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In response to the problems in the prior art, the purpose of the present invention is to provide a charging control method and system for charging equipment, which overcomes the difficulties of the prior art and can solve the technical problem that the prior art lacks charging control capabilities for mixed networking of single-phase charging equipment and three-phase charging equipment.

[0006] In a first aspect, the present disclosure provides a charging control method for a charging device, which is used to distribute charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, so that the charging network is a combination of one or both of the single-phase charging devices and the three-phase charging devices. The charging control method for the charging device is applied to a control node, and the control node establishes a communication connection with the multiple charging devices. The charging control method for the charging device includes:

[0007] Obtaining phase line information of each charging device connected thereto through the communication connection;

[0008] determining the number of the charging devices connected to each phase line based on the phase line information;

[0009] Based on the number of charging devices connected to the corresponding phase line and a preset phase line current threshold of the corresponding phase line, charging current is allocated to the charging devices connected to the corresponding phase line, and a charging current allocation value is sent to the charging devices connected to the corresponding phase line.

[0010] In some embodiments, the control node is any charging device in the charging network and is set as a host, and other charging devices in the charging network except the host are configured as slaves.

[0011] In some embodiments, the control node is any charging device in the charging network and is configured as a master, and other charging devices in the charging network except the master are configured as slaves, including:

[0012] When any of the charging devices receives the master configuration instruction, it starts the master mode in response to the master configuration instruction and sends the slave configuration instruction to the other charging devices.

[0013] In some embodiments, obtaining the phase line information of each charging device connected thereto through the communication connection includes:

[0014] Sending a request for obtaining phase line information and charging requirement information to each of the slave devices via the communication connection;

[0015] Receive response information of each slave to the phase line request, and obtain the phase line information and maximum charging current of each charging device based on the response information. The maximum charging current is used by the host to allocate charging current to the charging device connected to the corresponding phase line.

[0016] In some embodiments, sending the charging current distribution value to the charging device connected to the corresponding phase line includes:

[0017] The charging current distribution value is periodically broadcasted to the slaves connected to the corresponding phase lines.

[0018] In some embodiments, the charging device charging control method further includes:

[0019] After periodically broadcasting the charging current distribution value to each slave connected on the corresponding phase line, when charging demand change information is received from at least one slave on the corresponding phase line, the charging current distribution value of the charging device connected to the corresponding phase line is adjusted based on the charging demand change information, the number of charging devices connected to the corresponding phase line and the phase line current threshold, and the adjusted charging current distribution value is broadcast to each slave connected on the corresponding phase line.

[0020] In some embodiments, the charging requirement change information includes at least one of charging completion information, no charging requirement information, and new charging requirement information.

[0021] In some embodiments, the charging device charging control method further includes:

[0022] When a corresponding slave machine fault is detected, the fault information of the corresponding slave machine is reported.

[0023] In some embodiments, the charging device charging control method further includes:

[0024] When a fault is detected, a host switching request is reported, which includes host fault information.

[0025] A second aspect of the present disclosure provides a charging device charging control system for distributing charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, such that the charging network is a combination of one or both of the single-phase and three-phase charging devices. The charging device charging control system is applied to a control node, which establishes a communication connection with the multiple charging devices. The charging device charging control system includes:

[0026] a communication module, which obtains phase line information of each charging device connected thereto from the charging device via the communication connection;

[0027] a determination module, configured to determine the number of charging devices connected to each phase line based on the phase line information;

[0028] The current distribution module distributes charging current to the charging devices connected to the corresponding phase line based on the number of charging devices connected to the corresponding phase line and the phase line current threshold preset for the corresponding phase line, and sends the charging current distribution value to the charging devices connected to the corresponding phase line.

[0029] Compared with related technologies, the above charging device charging control method and system have the following technical effects:

[0030] For a charging network composed of single-phase charging devices or a charging network composed of three-phase charging devices, especially a hybrid network charging network composed of single-phase charging devices and three-phase charging devices, charging current can be distributed to the charging devices connected to the corresponding phase line based on phase line information and the phase line current threshold of the corresponding phase line. This can achieve accurate and flexible charging current distribution, solve the problem of uneven distribution caused by differences in current carrying capacity between single-phase charging devices and three-phase charging devices, and thus solve the technical problem that the existing technology lacks charging control capabilities for hybrid networks of single-phase charging devices and three-phase charging devices.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0033] Figure 1 This is a flow chart of a charging control method for a charging device provided in an embodiment of the present disclosure.

[0034] Figure 2 for Figure 1 Schematic diagram of a charging network to which the charging control method for charging equipment is applicable.

[0035] Figure 3 This is a flowchart of another charging control method for a charging device provided in an embodiment of the present disclosure.

[0036] Figure 4 This is a flowchart of a charging control method for a charging device in an application scenario provided by an embodiment of the present disclosure.

[0037] Figure 5 This is a schematic diagram of the module structure of the charging control system of the charging device provided in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] In addition, the accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures denote identical or similar parts, and thus repetitive descriptions thereof will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0040] An embodiment of the present disclosure proposes a charging control method for a charging device, which is used to distribute charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, so that the charging network is a combination of one or both of the single-phase charging devices and the three-phase charging devices; the charging control method for the charging device is applied to a control node, and the control node establishes a communication connection with the multiple charging devices.

[0041] like Figure 1 As shown, the charging control method for the charging device includes but is not limited to the following steps:

[0042] Step 110: Obtaining phase line information of each charging device connected thereto through communication connection;

[0043] Step 120: Determine the number of charging devices connected to each phase line based on the phase line information;

[0044] Step 130: Based on the number of charging devices connected to the corresponding phase line and the phase line current threshold preset for the corresponding phase line, a charging current is allocated to the charging devices connected to the corresponding phase line, and a charging current allocation value is sent to the charging devices connected to the corresponding phase line, so that the charging devices connected to the corresponding phase line output a charging current based on the charging current allocation value.

[0045] In the disclosed embodiments, single-phase charging devices connect to a single-phase power source, meaning they use only one phase (also known as the live or hot wire) to transmit power. In homes and small businesses, single-phase power typically provides 220V or 110V (depending on national and regional standards). Single-phase charging devices are designed for lower power charging needs and are suitable for use in homes or small charging stations.

[0046] Three-phase chargers, on the other hand, connect to a three-phase power source, meaning they use three phases (A, B, and C) to transmit power. Three-phase power can provide higher power and a more stable supply, making it suitable for scenarios requiring greater charging power, such as fast charging stations or industrial charging facilities. Three-phase chargers can deliver higher charging currents, thereby shortening charging times.

[0047] The phase line information is identification information of the phase line (such as at least one of phase A, phase B, and phase C) to which the charging device is connected. Each phase line has a preset phase line current threshold, which defines the total current that the phase line can provide.

[0048] In a hybrid charging station with single-phase and three-phase charging devices, since the charging devices connected to each phase line may be different, it is necessary to ensure that the power grid can handle the total power demand of these charging devices and that the power distribution is balanced to avoid putting pressure on the power grid.

[0049] The disclosed embodiments distribute charging current using phase lines as the basic unit. Thus, for a charging network composed of single-phase or three-phase charging devices, particularly a hybrid network composed of single-phase and three-phase charging devices, charging current can be distributed to the charging devices connected to the corresponding phase lines based on phase line information and the phase line current threshold of the corresponding phase line. This enables accurate and flexible charging current distribution, resolving the issue of uneven distribution caused by differences in current carrying capacity between single-phase and three-phase charging devices, and thus resolving the technical issue of the prior art's lack of charging control capabilities for hybrid networks of single-phase and three-phase charging devices.

[0050] In this embodiment, each charging device directly establishes a communication connection with the control node, and the number of charging devices connected to each phase line is obtained through the communication connection. Exemplarily, the communication connection can be implemented using Ethernet, WiFi, or a dedicated RF channel.

[0051] In the embodiment of the present disclosure, when the control node distributes the charging current to the charging device connected to the corresponding phase line, an average distribution method may be adopted according to the phase line current threshold.

[0052] In another embodiment, when the maximum charging current of each charging device is obtained, the charging current can be distributed in combination with the maximum charging current of the charging device to ensure that the charging current allocated to each charging device does not exceed its maximum charging current, thereby avoiding exceeding its current carrying capacity. In this case, the charging current allocated to each charging device connected to the corresponding phase line can be unequal. For example, if the maximum charging current of a charging device is lower than that of other charging devices, the charging current allocated to it may be lower than that of other charging devices.

[0053] In the embodiment of the present disclosure, the above-mentioned control node may be a centralized control node outside the charging network. For example, it may be a backend server or a backend user terminal.

[0054] In the embodiment of the present disclosure, it is also possible that any charging device in the above-mentioned electrical network is set as a host, and other charging devices in the charging network except the host are configured as slaves.

[0055] For example, Figure 2 As shown, the charging network includes five charging devices, of which the rightmost charging device is configured as the master, and the other four charging devices are configured as slaves: slave 1, slave 2, slave 3, and slave 4. Slave 1, slave 2, and slave 3 are all single-phase charging devices, with slave 1 connected to phase A, slave 2 to phase B, and slave 3 to phase C. Slave 4 and the master are both three-phase charging devices, connected to phases A, B, and C.

[0056] This implementation achieves modularization of charging devices. Specifically, each charging device can be independently connected to the charging network as a module, allowing flexible configuration and management within the charging network, regardless of whether it is a single-phase or three-phase charging device. Switching between master and slave devices and dynamic current adjustment ensure modularity and scalability of the charging pile, facilitating future additions or system upgrades. Remote monitoring and firmware upgrades also reduce maintenance costs.

[0057] As an implementation method, a distributed control architecture is adopted between the charging devices in the charging network. The host and slave devices maintain information consistency through a real-time synchronous communication protocol to ensure that the data of each charging device is accurate and the instructions are consistent during the dynamic current distribution process.

[0058] In one embodiment, the control node is any charging device in the charging network and is set as a master, and other charging devices in the charging network except the master are configured as slaves, specifically including:

[0059] When any of the charging devices receives the master configuration instruction, it starts the master mode in response to the master configuration instruction and sends the slave configuration instruction to the other charging devices.

[0060] In this embodiment, host configuration instructions can be manually input. Specifically, the charging device provides a configuration interface through which the user can configure the host mode. For example, the configuration interface displays a "host mode" icon or selection window, which, when triggered, generates host configuration instructions and automatically activates host mode.

[0061] At the same time, you can also set the phase line information, the phase line current threshold of each phase line in the charging network, and the total number of charging devices in the charging network on the host.

[0062] In an optional implementation manner, the slave mode and phase line information thereof may also be configured for other charging devices.

[0063] In an optional manner, the remote control system can also remotely configure the master and slave devices for each charging device. For example, based on the network address and identification information of each charging device, the remote control system communicates with each charging device and configures the master and slave devices.

[0064] In one embodiment, the host obtains the phase line information of each charging device connected thereto from the charging device via the communication connection, specifically comprising the following steps:

[0065] Sending a request for obtaining phase line information and charging requirement information to each of the slave devices via the communication connection;

[0066] Receive response information from each slave to the phase line request, and obtain phase line information and maximum charging current of each charging device based on the response information. The maximum charging current capability is used by the host to allocate charging current to the charging device connected to the corresponding phase line.

[0067] In this embodiment, the host communicates with multiple slaves through a local area network, requesting information about the phase line connected to each charging device and its maximum charging current. The maximum charging current feeds back its maximum charging current requirement, and then distributes the current on the phase line to the corresponding charging device.

[0068] Among them, the host can determine the total number of charging devices connected to each phase line based on the phase line information, and then distribute the total current on the phase line to the charging devices (including the host itself) based on the total number.

[0069] In an embodiment of the present disclosure, after allocating charging current to the charging devices connected to the corresponding phase lines, the allocated charging current is broadcast to each of the slaves to ensure that the current is distributed to each charging device in a timely manner, so that each charging device adjusts its own output charging current according to the allocated charging current.

[0070] The host can periodically broadcast the allocated charging current. The frequency of the periodic broadcast can be adjusted according to the number of charging devices in the local area network and their charging needs, and can also be set manually.

[0071] In one embodiment, the host periodically broadcasts the allocated charging current so as to promptly learn the real-time charging requirements of each charging device. Figure 3 As shown, the charging control method of the charging device includes:

[0072] Step 310: Obtaining phase line information of each charging device connected thereto through communication connection;

[0073] Step 320: Determine the number of charging devices connected to each phase line based on the phase line information;

[0074] Step 330: Allocate charging current to the charging devices connected to the corresponding phase line based on the number of the charging devices connected to the corresponding phase line and a preset phase line current threshold of the corresponding phase line;

[0075] Step 340: Periodically broadcast the charging current distribution value to the slaves connected to the corresponding phase lines;

[0076] Step 350: After periodically broadcasting the charging current distribution value to each slave connected to the corresponding phase line, when charging demand change information is received from at least one slave on the corresponding phase line, the charging current distribution value of the charging device connected to the corresponding phase line is adjusted based on the charging demand change information, the number of charging devices connected to the corresponding phase line and the phase line current threshold, and the adjusted charging current distribution value is broadcast to each slave connected to the corresponding phase line.

[0077] In this embodiment, the master periodically broadcasts the charging current allocation value and adjusts the charging current allocation value in real time based on the real-time feedback of charging demand changes. In this embodiment, the master adjusts the charging current allocation value for the next cycle through a closed-loop control algorithm based on the charging demand change information fed back by the slave.

[0078] In one embodiment, the charging requirement change information includes at least one of charging completion information, no charging requirement information, and newly added charging requirement information.

[0079] The charging completion message indicates that the current slave has completed charging and no further charging current allocation is required. At this point, other charging devices can increase their charging current without exceeding the maximum charging current. Therefore, adjusting the charging current allocation value actually increases the charging current allocation value for the corresponding charging device.

[0080] The no charging demand information indicates that the slave device has no charging demand, and no charging current may be allocated at this time.

[0081] The newly added charging demand information indicates that the charging device has a charging demand. At this time, the number of charging devices connected to the corresponding phase line is updated, and the charging current is allocated to the newly added charging device.

[0082] The charging control method for charging devices provided in the embodiments of the present disclosure also provides a fault reporting mechanism. For example, the host monitors the working status of each slave and reports the fault information of the corresponding slave when a fault is detected in the corresponding slave.

[0083] In this embodiment, the host can obtain the communication status with the slave based on the heartbeat mechanism. When the feedback information of the slave cannot be obtained, the fault information of the corresponding slave is reported. Combined with the periodic broadcast mechanism mentioned above, the host can monitor the communication status and data feedback of each charging device in the charging network in real time. When a charging device is detected to be unresponsive or with abnormal feedback for a long time, the host automatically removes it from the current charging current distribution calculation and issues a fault warning to all devices through a broadcast message, or reports the slave fault information to the remote control system to ensure that the faulty slave is removed in time.

[0084] In another embodiment, when a master detects a fault, it reports a master switch request containing the fault information. In this embodiment, the master switch request reports the fault and requests a timely master switch to avoid delays in charging control. The remote control system can then reconfigure the master and slave devices based on the master switch request and remove the faulty master from the charging network.

[0085] Below, the embodiments of the present disclosure are described in detail in combination with specific application scenarios. Figure 2 The working process of the charging network shown.

[0086] During the system initialization phase, each charging device automatically identifies itself and uploads its status (including its phase, maximum charging current, device serial number, etc.) to the host. The host then creates a complete device list and presets the phase current threshold (maximum current carrying value) for each phase. From then on, the charging network enters a real-time monitoring and control state.

[0087] During system operation, the host controls the charging current according to the following steps:

[0088] The host periodically (or dynamically adjusts based on on-site conditions) sends data collection request messages to all charging devices in the local area network, corresponding to the phase line request and charging device allocated current value mentioned above. After receiving the request, each slave collects parameters such as the current charging current, voltage, ambient temperature, and device load, and feeds the collected data back to the host along with the preset maximum charging current.

[0089] The host calculates the charging current allocation for each charging device based on the phase current threshold of each LAN incoming line and the number of charging devices currently in operation, using the basic formula "phase current threshold ÷ number of charging devices on that phase." The host then considers the basic charging needs of the charging devices and a safety margin, reserving a buffer current to handle emergencies.

[0090] After receiving the preliminary charging current allocation value, each slave device performs fine-tuning calculations based on its actual load and environmental parameters (such as reducing the charging current when the temperature exceeds a preset value) and feeds back the revised charging demand change information to the master. Based on the feedback data from all slave devices, the master device uses a weighted average method or other closed-loop control algorithm to adjust the preliminary charging current allocation value to ensure that each charging device can operate within a safe range.

[0091] The host computer broadcasts the revised charging current distribution value to all charging devices. Upon receiving the revised value, each charging device immediately adjusts its charging control module to regulate the charging current according to the revised value. This entire process forms a closed-loop control loop, ensuring the system can respond in real time to load changes and external environmental interference.

[0092] In this embodiment, each charging device has a modular design and can flexibly switch roles according to the needs of the charging network. The specific implementation is as follows:

[0093] During charging network initialization, each charging device automatically enters slave mode based on pre-set conditions and selects a charging device as the initial master. The selection of the initial master is based on a comprehensive evaluation of parameters such as device hardware performance, current carrying capacity, communication latency, and response time.

[0094] During the operation of the charging network, the host continuously monitors its own status and the feedback data of each charging device in the local area network, which corresponds to the charging demand change information mentioned above. When the remote control system or the current host itself detects an abnormality in the current host (such as communication interruption, response timeout or internal fault), the host switching mechanism is triggered, and the charging device that meets the preset conditions (such as a large remaining charging current margin and a short response time) automatically takes over the host responsibilities. This process is implemented through a preset switching algorithm to ensure that the switching process is seamless and does not affect the overall current distribution stability.

[0095] To accommodate the automatic switching mechanism, each charging device utilizes standardized hardware interfaces and communication protocols. These interfaces include power input, signal transmission, data communication, and control interfaces; the communication protocols define data frame formats, device address identification, message verification, and fault alarms. This standardized design allows all charging stations, regardless of manufacturer or model, to be integrated into the system, enabling modular management and expansion.

[0096] For example, consider a public charging station with five charging stations operating simultaneously. Initially, the master station is numbered 01. During operation, if the system detects that charging station 01 is responding slowly due to excessive internal temperature, a pre-set algorithm determines that charging station 05 is responding the fastest and functioning normally. The system immediately notifies the entire network to initiate a role switch, with charging station 05 automatically taking over the master role and charging station 01 downgrading to a slave. The entire switchover process takes less than one second, ensuring continuous and stable current distribution control.

[0097] In the disclosed embodiment, to ensure stable operation of the charging network under various abnormal conditions, a comprehensive fault detection and self-recovery mechanism is designed. The specific steps are as follows:

[0098] The host has a built-in fault detection module that monitors the communication status and data feedback of each charging device in real time. If a charging device is detected to be unresponsive for an extended period of time or to provide abnormal feedback data, a fault log is recorded.

[0099] When a fault occurs, the host sends a fault alarm message and temporarily removes the faulty device from the current distribution calculation to ensure that other charging devices are not affected by abnormal data.

[0100] When the faulty charging device returns to normal operation, it automatically reports its status change to the host computer and rejoins the charging network. The host computer then recalculates the charging current distribution value based on the latest device status and broadcasts the adjusted result to the entire network. This process uses a redundant mechanism to ensure that the system maintains stable current distribution control during failure and recovery.

[0101] For example, in a home charging network, if a charger's data hasn't been updated for an extended period due to power fluctuations or hardware failure, the host computer will immediately remove it from the allocation calculation and notify the user to check. Once the faulty charger passes self-test, it will be reintegrated into the allocation cycle, preventing the impact of individual charger anomalies on overall charging efficiency.

[0102] In one embodiment, Figure 4 As shown, a charging control method for a charging device is also provided, which includes but is not limited to the following steps:

[0103] Step 410: Initialize the master and slave to establish a master-slave communication architecture:

[0104] Set the master (address is 1) and slave (address greater than 1), set the maximum current of the LAN incoming phase line on the master, and set the total number of charging devices in the LAN on the master;

[0105] Step 420: Check whether there is no master failure or slave address conflict failure, and whether each slave can receive the message sent by the master. The master failure may include the presence of multiple masters. Ensure the reliability of the master-slave communication and prevent control confusion caused by multiple master competition or address conflict.

[0106] If there is a fault (No), execute step 430 to report the fault and return to step 420, forming a closed loop of fault detection until the problem is solved;

[0107] If there is no fault (yes), then execute step 440 to set the phase line of all slaves (one of phases A, B, and C). The phase line of the three-phase charging pile is set to phase D. This lays the foundation for subsequent current distribution and ensures that the host knows the phase line of each charging pile. Phase D may correspond to a DC charging pile.

[0108] Step 450: Determine whether the host has received the charging current requirements and their phase lines uploaded by all slaves, reflecting the real-time performance of the distributed system;

[0109] If the charging current requirements and the phase lines of all slave devices are received (yes), step 460 is executed: determining whether there is a D-phase charging requirement;

[0110] If there is a D-phase charging demand (yes), perform the following steps in sequence:

[0111] Step 470: The host counts the total number of charging stations on each phase line. The number of charging stations on phase D needs to be counted on phases A, B, and C.

[0112] Step 480: The host calculates the three-phase distribution current by dividing the maximum current of each phase line by the total number of charging piles on the phase line, and then takes the minimum value among the three phases as the actual distribution current of each phase, and dynamically distributes the current on each phase evenly. The average distribution ensures that the current of each phase does not exceed the maximum value, and optimizes the utilization rate of the power grid. Taking the minimum value of the three phases as the distribution current can prevent overload of a phase and ensure system stability.

[0113] Step 490: The host periodically broadcasts the charging current allocation value to each slave. Periodic broadcasting ensures that the slave obtains the latest allocation instructions in real time and adapts to dynamic changes. The broadcast mechanism reduces communication overhead and is suitable for multi-slave scenarios.

[0114] Step 4100: Determine whether the slave has received the message sent by the master;

[0115] If a message is received from the host (yes), the slave executes step 4110, where it uploads its charging requirements to the host and its own phase line, and then returns to step 450. The slave actively uploads data to form a closed-loop communication, and the host can dynamically adjust the allocation based on the latest data. The waiting mechanism ensures system robustness and prevents crashes caused by communication interruptions.

[0116] If the slave does not receive the message sent by the master (No), the slave continues to wait for the message from the master and ends.

[0117] In the above embodiment, if the host receives the charging current requirements and the phase lines of all the slaves, step 450 is executed again.

[0118] In the above embodiment, if there is no D-phase charging demand (No), the following steps are performed in sequence:

[0119] Step 4120: The host counts the total number of charging stations on each phase line A, B, and C that have charging needs;

[0120] Step 4130: The host calculates the three-phase distribution current by dividing the maximum current of each phase line by the total number of charging piles on the phase line, directly and dynamically distributes the current on each phase evenly, and continues to execute step 490.

[0121] In this case, the logic is simplified when there is no D phase, and the allocation is directly based on the A, B, and C phases, reducing the calculation complexity while still maintaining the load balancing goal and ensuring uniform three-phase current.

[0122] This embodiment achieves three-phase electrical load balancing through master-slave communication and dynamic current distribution, and is suitable for smart charging station scenarios, such as home charging systems, public charging station systems, and urban charging systems.

[0123] In home charging systems, the number of charging stations is limited, but single-phase and three-phase charging are often mixed. Through the modular design and dynamic master-slave switching of the disclosed embodiments, home users can achieve balanced current distribution and safe charging across all charging stations with a simple configuration. Users can monitor charging status in real time via a touchscreen or mobile device, and receive prompt alerts and self-recovery services in the event of anomalies.

[0124] Public charging station systems have a large number of charging piles, and charging demand fluctuates significantly. Using the dynamic charging current distribution algorithm described in this disclosure, the host computer can flexibly adjust the charging current of each charging pile based on real-time data, ensuring that all devices receive a reasonable current supply during peak hours. The master-slave switching mechanism further ensures that the entire network maintains efficient operation even in the event of a local failure, preventing global paralysis caused by a single point of failure.

[0125] In large-scale city-level charging networks, charging piles achieve cross-regional data synchronization and remote monitoring via the internet. The standardized interfaces and communication protocols of the disclosed embodiments ensure interoperability among charging piles of different manufacturers and models. Through centralized data processing and distributed control, city-level charging networks can achieve cross-regional current load balancing, improving overall power supply efficiency and user experience.

[0126] The disclosed embodiment also provides a charging device charging control system, which is used to distribute charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, so that the charging network is a combination of one or both of the single-phase charging devices and the three-phase charging devices; the charging device charging control system is applied to a control node, and the control node establishes a communication connection with the multiple charging devices. Figure 5 As shown, the charging control system of the charging equipment includes:

[0127] The communication module 510 obtains the phase line information of each charging device through the communication connection;

[0128] A determination module 520 determines the number of charging devices connected to each phase line based on the phase line information;

[0129] The current distribution module 530 distributes charging current to the charging devices connected to the corresponding phase line based on the number of charging devices connected to the corresponding phase line and the phase line current threshold preset for the corresponding phase line, and sends the charging current distribution value to the charging devices connected to the corresponding phase line.

[0130] In the above embodiment, the communication module 510 is responsible for obtaining the phase line information of each charging device through the communication connection. Each charging device transmits its phase line and load capacity (i.e., maximum charging current) to the control node. The communication module 510 can use wireless or wired network protocols (such as Wi-Fi, Bluetooth, Ethernet, etc.) for data exchange, ensuring real-time data transmission between the charging device and the control node.

[0131] The determination module 520 determines the number of charging devices connected to each phase line based on the phase line information obtained from each charging device. The determination module 520 determines the number of charging devices connected to each phase line by analyzing the device connection status of each phase line in the network and performs load analysis on each phase line.

[0132] The current distribution module 530 distributes charging current based on the number of connected charging devices on each phase line, using phase information and corresponding phase current thresholds. This module intelligently calculates the charging current allocation for each charging device based on the maximum charging current of each phase line and the load requirements of the connected charging devices. The current distribution module 530 not only distributes current but also provides feedback to the charging devices, sending the specific charging current allocation value to each charging device.

[0133] Using the charging control system of the charging device of this embodiment, for a charging network composed of single-phase charging devices or a charging network composed of three-phase charging devices, especially a hybrid network charging network composed of single-phase charging devices and three-phase charging devices, the charging current can be distributed to the charging devices connected on the corresponding phase line based on the phase line information and the phase line current threshold of the corresponding phase line. This can achieve accurate and flexible charging current distribution, solve the problem of uneven distribution caused by the difference in current carrying capacity between single-phase charging devices and three-phase charging devices, and thus solve the technical problem that the existing technology lacks charging control capabilities for the hybrid network of single-phase charging devices and three-phase charging devices.

[0134] Finally, through a reasonable current distribution mechanism, the system not only improves charging efficiency, but also avoids the overload problem of charging equipment, extends the service life of the equipment, and improves the safety of the charging network.

[0135] In conjunction with the above-described charging device control method, this charging control system provides a master and slave configuration mechanism. The control node is any charging device in the charging network and is configured as the master. All other charging devices in the charging network, except the master, are configured as slaves. In this case, each charging device is equipped with the aforementioned communication module 510, determination module 520, and current distribution module 530, achieving a modular design.

[0136] The charging control method and system for charging devices disclosed in this disclosure effectively implement dynamic current scheduling within the charging network by introducing an intelligent current distribution mechanism and master-slave configuration mode. By accurately acquiring phase line information, analyzing the number of charging devices, and calculating charging current distribution, the present invention can adapt to mixed networking of single-phase and three-phase charging devices, ensuring reasonable and balanced charging current distribution during the charging process, thereby improving charging efficiency and system stability. This technical solution not only has broad applicability but also effectively addresses issues such as equipment failures and changes in load demand, ensuring the safety and efficiency of the charging network.

[0137] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A charging control method for a charging device, characterized in that: The method is used to distribute charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, so that the charging network is a combination of one or both of the single-phase and three-phase charging devices; the charging device charging control method is applied to a control node, and the control node establishes a communication connection with the multiple charging devices; The charging control method for a charging device includes: Obtaining phase line information of each charging device connected thereto through the communication connection; determining the number of the charging devices connected to each phase line based on the phase line information; Based on the number of charging devices connected to the corresponding phase line and a preset phase line current threshold of the corresponding phase line, charging current is allocated to the charging devices connected to the corresponding phase line, and a charging current allocation value is sent to the charging devices connected to the corresponding phase line.

2. The charging control method for charging equipment according to claim 1, characterized in that: The control node is any charging device in the charging network and is set as a host, and other charging devices in the charging network except the host are configured as slaves.

3. The charging control method for charging equipment according to claim 2, characterized in that: The control node is any charging device in the charging network and is set as a master, and the other charging devices in the charging network except the master are configured as slaves, including: When any of the charging devices receives the master configuration instruction, it starts the master mode in response to the master configuration instruction and sends the slave configuration instruction to the other charging devices.

4. The charging control method for charging equipment according to claim 3, characterized in that: The obtaining, from each charging device, phase line information of the charging device connected thereto through the communication connection, includes: Sending a request for obtaining phase line information and charging requirement information to each of the slave devices via the communication connection; Receive response information from each slave, and obtain phase line information and maximum charging current of each charging device based on the response information. The maximum charging current is used by the host to distribute charging current to the charging devices connected to the corresponding phase line.

5. The charging control method for charging equipment according to claim 3, characterized in that: The sending of the charging current distribution value to the charging device connected to the corresponding phase line includes: The charging current distribution value is periodically broadcasted to the slaves connected to the corresponding phase lines.

6. The charging control method for charging equipment according to claim 5, characterized in that: The charging control method for the charging device further includes: After periodically broadcasting the charging current distribution value to each slave connected on the corresponding phase line, when charging demand change information is received from at least one slave on the corresponding phase line, the charging current distribution value of the charging device connected to the corresponding phase line is adjusted based on the charging demand change information, the number of charging devices connected to the corresponding phase line and the phase line current threshold, and the adjusted charging current distribution value is broadcast to each slave connected on the corresponding phase line.

7. The charging control method for charging equipment according to claim 6, characterized in that: The charging requirement change information includes at least one of charging completion information, no charging requirement information, and newly added charging requirement information.

8. The charging control method for charging equipment according to claim 3, characterized in that: The charging control method for the charging device further includes: When a corresponding slave machine fault is detected, the fault information of the corresponding slave machine is reported.

9. The charging control method for charging equipment according to claim 3, characterized in that: The charging control method for the charging device further includes: When a fault is detected, a host switching request is reported, which includes host fault information.

10. A charging control system for a charging device, characterized in that: The charging device charging control system is used to distribute charging current to a charging network composed of multiple charging devices, each of which is a single-phase charging device or a three-phase charging device, so that the charging network is a combination of one or both of the single-phase and three-phase charging devices; the charging device charging control system is applied to a control node, and the control node establishes a communication connection with the multiple charging devices; The charging control system of the charging device includes: a communication module, which obtains phase line information of each charging device connected thereto from the charging device via the communication connection; a determination module, configured to determine the number of charging devices connected to each phase line based on the phase line information; The current distribution module distributes charging current to the charging devices connected to the corresponding phase line based on the number of charging devices connected to the corresponding phase line and the phase line current threshold preset for the corresponding phase line, and sends the charging current distribution value to the charging devices connected to the corresponding phase line.

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