Intelligent scheduling method and intelligent charging pile system with efficient V2G function

Abstract

The present invention belongs to the technical field of charging piles and specifically provides an intelligent scheduling method and an intelligent charging pile system with efficient V2G functionality. The method includes: if a power control module receives power request information from a charging and discharging terminal, it collects the status of each power module in real time; based on the power request information and the power module status, it calculates the required power and the schedulable power; the smaller value of the required power and the schedulable power is used as the target scheduling power; based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal for energy transmission. Dynamic power scheduling is achieved. Compared with traditional charging piles, this flexible power distribution method significantly improves equipment utilization and reduces idle power waste.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging piles, and specifically relates to an intelligent scheduling method and an intelligent charging pile system with efficient V2G function. Background Art

[0002] Charging piles are devices that provide electrical energy for electric vehicles. They are divided into two categories: fast charging (DC) and slow charging (AC).

[0003] Currently, traditional charging piles generally utilize a unidirectional power supply mode, employing a unidirectional grid-to-vehicle (G2V) topology. This design inherently prevents reverse energy flow from vehicle to grid (V2G). The fundamental reason for this is that the power conversion module utilizes a unidirectional AC / DC topology, and the control system lacks a bidirectional power scheduling algorithm. Regarding power distribution, existing systems employ a static binding model, where each charging port is fixedly connected to a specific power module. This results in wasted power resources when some charging ports are idle. This architectural flaw results in charging pile power utilization rates typically below 50%, making them unable to respond to the dynamic scheduling needs of the grid. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent scheduling method and an intelligent charging pile system with efficient V2G function to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: In a first aspect, the present invention provides an intelligent scheduling method, which is applied to an intelligent charging pile system, wherein the intelligent charging pile system is connected to a power grid; the intelligent charging pile system includes a power cube and a charging and discharging terminal, wherein the power cube includes a power control module, a power distribution module, and several power modules, wherein some power modules support bidirectional energy transmission, and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged in several groups; the scheduling method includes:

[0006] If the power control module receives power request information from the charging and discharging terminal, it collects the status of each power module in real time; calculates the required power and the schedulable power based on the power request information and the power module status; takes the smaller value of the required power and the schedulable power as the target scheduling power; based on the target scheduling power, the power allocation module schedules the corresponding power module to cooperate with the charging and discharging terminal for energy transmission.

[0007] In a second aspect, the present invention provides an intelligent charging pile system with an efficient V2G function, which is used to implement the intelligent scheduling method described in the first aspect, wherein the intelligent charging pile system is connected to the power grid; the intelligent charging pile system includes a power cube and a charging and discharging terminal, and the power cube includes a power control module, a power distribution module and several power modules, wherein some power modules support bidirectional energy transmission, and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged in several groups; the power cube is communicatively connected to each of the charging and discharging terminals, and the power control module is communicatively connected to the power distribution module and the several power modules.

[0008] The beneficial effects of the present invention are as follows: The present invention provides an intelligent scheduling method and an intelligent charging pile system with efficient V2G functions. The method includes: if the power control module receives power request information from the charging and discharging terminal, real-time acquisition of the status of each power module; calculating the required power and the schedulable power based on the power request information and the power module status; using the smaller value of the required power and the schedulable power as the target scheduling power; based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal for energy transmission. Dynamic power scheduling is achieved. Compared with traditional charging piles, this flexible power distribution method significantly improves equipment utilization and reduces idle power waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A flowchart of the intelligent scheduling method provided by an embodiment of the present invention;

[0010] Figure 2 A schematic block diagram of a smart charging pile system with efficient V2G functionality provided by an embodiment of the present invention;

[0011] Figure 3 A communication network topology diagram of a smart charging pile system with efficient V2G functionality provided by an embodiment of the present invention;

[0012] Figure 4 A sub-flowchart of the intelligent scheduling method provided by an embodiment of the present invention;

[0013] Figure 5 A sub-flowchart of the intelligent scheduling method provided by an embodiment of the present invention;

[0014] Figure 6 A sub-flowchart of the intelligent scheduling method provided by an embodiment of the present invention;

[0015] Figure 7 A sub-flowchart of the intelligent scheduling method provided by an embodiment of the present invention;

[0016] Figure 8A sub-flowchart of the intelligent scheduling method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an intelligent scheduling method, which is applied to an intelligent charging pile system with efficient V2G function, wherein the intelligent charging pile system is connected to the power grid; the intelligent charging pile system includes a power cube and a charging and discharging terminal, and the power cube includes a power control module, a power distribution module and several power modules, wherein some power modules support bidirectional energy transmission, and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged into several groups.

[0019] See also Figure 3 In one embodiment, the power cube is a 720kW bidirectional group charging power cube. The charging and discharging terminals include two 600kW DC bidirectional charging and discharging terminals and six 250kW DC bidirectional charging and discharging terminals. These terminals can be understood as charging piles. Each charging and discharging terminal includes a user interface (not shown), a safety protection module, and at least one charging gun. Each charging gun can be equipped with bidirectional charging and discharging capabilities, or V2G capabilities, when required. The user interface includes a high-resolution touch screen and LED display, which displays the charging progress, power allocation status, and abnormal warning messages in real time. Users can use the interface to schedule charging and V2G services, view fee details, and revenue information. Both local and remote operation are supported, providing an intuitive user interface that allows vehicle owners to easily understand the current charging status, V2G revenue information, and schedule V2G services. Remote monitoring and management are also supported, allowing operators to monitor charging pile status in real time and adjust power strategies to ensure efficient system operation. Vehicle battery SOC and terminal status can also be easily viewed. The safety protection module can be equipped with multiple built-in sensors to monitor the voltage, current, temperature and working status of each module in real time. It can also upload the collected operating data through remote connection with the cloud platform, supporting remote monitoring, fault warning and policy adjustment, making it easier for operators to centrally manage the entire system.

[0020] Specifically, if Figure 2 and Figure 3As shown, the power control module is the PCU (power control unit), and the power distribution module includes the PDU (power distribution unit) control unit and 32 PDUs (e.g., PDU1-32# shown). The charging and discharging terminals are connected to the PCU via CAN (alternative Ethernet). The PCU serves as the central controller of the smart charging pile system, receiving and processing information and issuing control commands. The PCU connects to the cloud server via the network and controls the PDU control unit and cooling system via a local communication interface (e.g., serial communication standards 232 or 485 shown). The PCU regularly updates and self-diagnoses, and can quickly issue power-off and current-limiting commands if the safety protection module detects an anomaly (such as overcurrent, overtemperature, short circuit, or reverse battery connection).

[0021] The PDU control unit further controls the PDU to dispatch multiple power modules, enabling energy transmission to any charging and discharging terminal. The minimum dispatchable power is 30kW, enabling fine-grained control. The PDU utilizes a full matrix design, allowing any power module to be dynamically assigned to any charging and discharging terminal at any time. When multiple power modules are operating simultaneously, on-demand distribution between power modules is achieved, with a total output of at least 600kW.

[0022] The power module can be configured to have 28 power modules (e.g., modules 1-28# shown in the figure). The cooling system dissipates heat from the power cube. The power module has an input voltage of 380VAC ±15% (three-phase + N+PE) and a rated power of 720kW. It supports twelve 250A standard charging cables and two 600kW liquid-cooled charging cables. The twelve 250A standard charging cables are paired with six 250kW DC bidirectional charging and discharging terminals (e.g., fast charging cables 1# to 12# shown in the figure). Each of the two 600kW DC bidirectional charging and discharging terminals is equipped with a 600kW liquid-cooled charging cable (e.g., supercharging cables 1# and 2# shown in the figure). This allows the smart charging station system to simultaneously support two supercharging and 12 fast charging cables. Each charging cable has V2G functionality, with a maximum discharge power of 120kW and a maximum charging power of 600kW / 250kW.

[0023] like Figure 1 As shown, the scheduling method includes steps S1 to S4.

[0024] S1. If the power control module receives power request information from the charging and discharging terminal, it collects the status of each power module in real time.

[0025] In this embodiment, after connecting the charging gun to the vehicle, the user can select a charging request or a discharging request through the user interaction interface of the charging and discharging terminal, and further select the charging power and discharging power. The charging request means that the user needs to use the charging gun to charge his vehicle; the discharging request means that the user needs to transmit the electric energy of his vehicle to the power grid. Therefore, the power request information received by the power control module from the charging and discharging terminal includes at least energy transmission direction information and requested power size information. The power control module collects the status of each power module in real time. The power module status includes idle state and occupied state. The idle state means that the power module is not configured with any charging and discharging terminal, and the occupied state means that the power module is in the state of being configured with the charging and discharging terminal. The power module status also includes power-on state and power-off state. The power-on state and power-off state are power-on and power-off relative to the power module itself, that is, the power-off state is not equal to the idle state. During the process of energy transmission between the power module and the charging and discharging terminal, it should be in the power-on state.

[0026] S2. Calculate required power and dispatchable power according to the power request information and the power module status.

[0027] In this embodiment, the power control module obtains the requested power information from the power request information and obtains the idle power modules and their rated powers from the power module status. If the currently received power request information comes from a single charging and discharging terminal, the power indicated by the requested power information in the power request information is the required power. If the currently received power request information comes from multiple charging and discharging terminals, the sum of the power indicated by the requested power information in the multiple power request information is the required power. The sum of the rated powers of the currently idle power modules is the dispatchable power.

[0028] like Figure 4 As shown, in a further embodiment, S2, calculating the required power and the dispatchable power according to the power request information and the power module status, includes steps S21 to S25.

[0029] S21. Determine whether the energy transmission request direction in the power request information is consistent with a supported direction of a currently configured power module.

[0030] In this embodiment, the power control module obtains energy transmission direction information from the power request information to determine whether the energy transmission direction requested by the charging and discharging terminal is from the power grid to the vehicle or from the vehicle to the power grid. The charging and discharging terminal may have a power module currently configured with it, as it has been used by a previous user. Because some of the multiple power modules in the power cube support bidirectional energy transmission, i.e., have V2G functionality, while others support unidirectional energy transmission, i.e., have only G2V functionality, the power control module obtains the supported energy transmission direction from the power module status collected from the power module already configured with the current charging and discharging terminal to determine whether the energy transmission request direction in the power request information is consistent with the energy transmission direction supported by the power module.

[0031] Among them, if the power module configured with the current charging and discharging terminal only supports unidirectional energy transmission, and the energy transmission request direction from the charging and discharging terminal is from vehicle to grid, then the energy transmission request direction is judged to be consistent with the support direction of the currently configured power module, otherwise it is inconsistent; if the power module configured with the current charging and discharging terminal supports bidirectional energy transmission, and the energy transmission request direction from the charging and discharging terminal is from vehicle to grid, then the energy transmission request direction is judged to be consistent with the support direction of the currently configured power module, otherwise it is inconsistent.

[0032] S22: If the energy transmission request direction is consistent with the supported direction of the currently configured power module, determine the magnitude of the requested power in the power request information and the rated power of the currently configured power module.

[0033] In this embodiment, the requested power refers to the power indicated by the requested power size information in the power request information, i.e., the user requests energy transmission at this requested power. If the energy transmission request direction is consistent with a supported direction of the currently configured power module, the power control module determines the difference between the requested power in the power request information and the rated power of the currently configured power module based on a preset determination algorithm.

[0034] S23. If the requested power is greater than the rated power of the currently configured power module, calculate the difference between the requested power and the rated power of the currently configured power module.

[0035] In this embodiment, if the requested power is greater than the rated power of the currently configured power module, it indicates that the currently configured power module is insufficient to meet the user's requested power, and other power modules need to be dispatched to work with the currently configured power module to coordinate energy transmission with the charging and discharging terminal. The difference between the requested power and the rated power of the currently configured power module is calculated, and the other power modules are dispatched based on this difference.

[0036] S24: When the difference between the requested power and the rated power of the currently configured power module is greater than a first threshold, use the difference between the requested power and the rated power of the currently configured power module as the required power.

[0037] In this embodiment, the difference between the requested power and the rated power of the currently configured power module is used as the required power only when the difference between the requested power and the rated power of the currently configured power module is greater than a first threshold. The first threshold is 10 kW. As described in the previous embodiment, the minimum dispatch power of the Power Cube is 30 kW, meaning that the first threshold is one-third of the minimum dispatch power. This minimum dispatch power can be achieved by dispatching a single power module or multiple power modules. Thus, only when the requested power is greater than the rated power of the currently configured power module and the difference exceeds 10 kW is the difference set as the required power. By setting the first threshold to 10 kW, when the difference between the rated power and the requested power of the currently configured power module is less than 10 kW, for example, 1 kW, 5 kW, or 8 kW, the difference is limited to a smaller range. The currently configured power module can barely meet the user's energy transmission needs, and the required power can be set, meaning that no other power modules can be dispatched to the current charging and discharging terminal. Thus, by setting the first threshold, frequent scheduling of power modules can be avoided.

[0038] S25. Calculate the sum of the rated powers of the power modules in the idle state as the dispatchable power.

[0039] In this embodiment, the power control module calculates the sum of the rated powers of the power modules in the idle state as the schedulable power, which means that the power modules in the idle state can be preliminarily confirmed as schedulable modules.

[0040] like Figure 5 As shown, in a further embodiment, S25, calculating the sum of the rated powers of the power modules in the idle state as the dispatchable power, includes:

[0041] S251. If the energy transmission request direction is from the grid to the vehicle, calculate the dispatchable power of the power module supporting unidirectional energy transmission;

[0042] S252: If the energy transmission request direction is from vehicle to grid, calculate the dispatchable power of the power module supporting bidirectional energy transmission.

[0043] In this embodiment, since some power modules in the power cube support bidirectional energy transmission and other power modules support unidirectional energy transmission, the power modules in the idle state may also include power modules that support bidirectional energy transmission and power modules that only support unidirectional energy transmission. The purpose of this embodiment is to perform targeted scheduling control according to the energy transmission request direction in the subsequent scheduling step. For example, when the energy transmission request direction is from vehicle to grid, the power modules that support bidirectional energy transmission are scheduled to perform energy transmission. Since the energy transmission request direction required by the user has been obtained in step S21, in this step, the rated power of the corresponding power module in the idle state is specifically calculated as the dispatchable power according to the energy transmission request direction, that is, if the energy transmission request direction is from grid to vehicle, the dispatchable power of the power module that supports unidirectional energy transmission is calculated. If the energy transmission request direction is from vehicle to grid, the dispatchable power of the power module that supports bidirectional energy transmission is calculated, thereby avoiding miscalculation of the dispatchable power and realizing dedicated scheduling of the power module.

[0044] like Figure 4 As shown, in a further embodiment, after S21, determining whether the energy transmission request direction in the power request information is consistent with the supported direction of the currently configured power module, the intelligent scheduling method further includes:

[0045] S26: If the energy transmission request direction is inconsistent with the supported direction of the currently configured power module, mark the currently configured power module as a target switching-out module.

[0046] In this embodiment, in order to realize the dedicated scheduling of power modules, if the energy transmission request direction is inconsistent with the support direction of the currently configured power module, the currently configured power module is marked as the target cut-out module. In the subsequent step of scheduling the power module, the target cut-out module is cut out to release its configuration status with the current charging and discharging terminal, so that the power module is converted from the occupied state to the idle state, so that it can be scheduled to other charging and discharging terminals that need it more.

[0047] like Figure 4 As shown, in a further embodiment, the intelligent scheduling method further includes, after S22, if the energy transmission request direction is consistent with the supported direction of the currently configured power module, determining the size of the requested power in the power request information and the rated power of the currently configured power module:

[0048] S27. If the requested power is less than the rated power of the currently configured power module, calculate the difference between the rated power of the currently configured power module and the requested power.

[0049] In this embodiment, if the requested power is less than the rated power of the currently configured power module, it means that the currently configured power module has a surplus on the basis of meeting the user's requested power. In order to reasonably schedule the power module and avoid waste caused by invalid occupation of the power module, the difference between the rated power and the requested power of the currently configured power module is calculated, and the power module is cut out according to the difference, so that the cut-out power module can be scheduled to the charging and discharging terminal that needs it more.

[0050] S28: When the difference between the rated power of the currently configured power module and the requested power is greater than a second threshold, mark the corresponding power module as a target switch-out module.

[0051] In this embodiment, the second threshold is 30KW, and the second threshold is equal to the minimum dispatching power of the power cube. Since the power cube in this intelligent charging pile system has a minimum dispatching power of 30KW, in order to facilitate scheduling and ensure the stability of the system, only when the requested power is less than the rated power of the currently configured power module and the difference between the rated power of the currently configured power module and the requested power is greater than 30KW, the corresponding power module will be marked as the target cut-out module. Among them, the corresponding power module is understood to be the power module corresponding to the part with a difference greater than 30KW. For example, when the rated power of the currently configured power module is 250KW and the requested power is 190KW, the power module corresponding to the excess 60KW is marked as the target cut-out module.

[0052] S3. Taking the smaller value of the required power and the schedulable power as the target scheduling power.

[0053] In this embodiment, the power control module calculates the smaller of the required power and the available power and uses the result as the target dispatch power. For example, if the required power is 120 kW and the available power is 240 kW, the target dispatch power is 120 kW; if the required power is 250 kW and the available power is 240 kW, the target dispatch power is 240 kW.

[0054] S4. Based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal to perform energy transmission.

[0055] In this embodiment, after the power control module calculates the target scheduling power, it generates the power module information that needs to be scheduled and the scheduling target terminal information, and sends it to the power distribution module, wherein the power module information indicates which power modules need to be scheduled, and the scheduling target terminal information indicates which charging and discharging terminals the power modules need to be scheduled to, so that the power distribution module can accurately schedule the power modules according to the power module information and the scheduling target terminal information. Specifically, the PDU control unit in the power distribution module controls the PDU to schedule the power modules, wherein one PDU can be responsible for the scheduling of one power module, or one PDU can be responsible for the scheduling of multiple power modules, or multiple PDUs can be responsible for the scheduling of one power module. After the power module is scheduled to the charging and discharging terminal, energy transmission can be performed after it is powered on.

[0056] Furthermore, power module scheduling not only dispatches idle power modules to the current charging and discharging terminal, but also disconnects power modules already configured for the current charging and discharging terminal. The power control module generates target disconnect module information based on the target disconnect modules identified in steps S26 and S28, and sends this information to the power distribution module, enabling the power distribution module to disconnect the target disconnect module based on the target disconnect module information. Once disconnected, the target disconnect module becomes an idle power module and can be dispatched to another charging and discharging terminal.

[0057] like Figure 6 As shown, in a further embodiment, S4, based on the target scheduling power, scheduling the corresponding power module through the power distribution module to cooperate with the charging and discharging terminal to perform energy transmission, including:

[0058] S41, determining whether the target switching module meets a first condition, where the first condition is that the target switching module is in a shutdown state and the output current is lower than a current threshold;

[0059] S42: If the target cut-out module meets a first condition, control the corresponding relay to be disconnected to cut out the target cut-out module.

[0060] In this embodiment, when the power distribution module performs a specific cut-out step, in order to ensure that the target cut-out module can be cut out safely, it is necessary to perform further safety checks on it, that is, to determine whether the target cut-out module meets the first condition, and the first condition is that the target cut-out module is in the shutdown state and the output current is lower than the current threshold, wherein the current threshold is 5A. If the target cut-out module is in the power-on state, it is necessary to send a shutdown command to it to convert it to the shutdown state. When the target cut-out module meets the first condition, the corresponding relay is controlled to disconnect to cut out the target cut-out module, wherein relays and control circuits are set in each PDU, and the PDU control unit controls the relay in the PDU to disconnect to cut out the power module that the PDU is responsible for.

[0061] like Figure 7 As shown, in a further embodiment, S4, based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal to perform energy transmission, including S43~S46.

[0062] S43. Based on the target scheduling power, the power module used to calculate the schedulable power is confirmed as the target input module.

[0063] In this embodiment, the power control module determines the target input module based on the target dispatch power calculated in step S3 to generate target input module information. Taking the example in step S3 as an example, if the required power is 120KW and the dispatchable power is 240KW, the target dispatch power is 120KW. In this case, the power module corresponding to any 120KW of the 240KW is determined as the target input module. For example, 240KW is calculated by comprehensively calculating the rated power of modules 1# to 8#, and the rated power of modules 1# to 8# is 30KW. In this case, any four power modules can be determined as target input modules.

[0064] If the required power is 250KW and the dispatchable power is 240KW, the target dispatch power is 240KW. In this case, the power modules corresponding to 240KW are all confirmed as target input modules.

[0065] like Figure 8 As shown, in a further embodiment, S43, based on the target scheduling power, confirming the power module used to calculate the dispatchable power as the target input module includes:

[0066] S431. Prioritize determining whether the rated power of the idle power module in the local compartment is greater than or equal to the target scheduling power.

[0067] S432: If the rated power of the idle power module in the local compartment is greater than or equal to the target dispatching power, determine the power module in the local compartment as the target input module based on the target dispatching power.

[0068] S433: If the rated power of the idle local power module is less than the target dispatching power, confirm that the local power module and the cross-compartment power module are both target input modules according to the target dispatching power.

[0069] In this embodiment, it is applicable to the situation where the dispatchable power is greater than the required power, that is, the target dispatch power is equal to the required power. At this time, the dispatchable power has a surplus relative to the required power. The power modules in the idle state used to calculate the dispatchable power include the local warehouse power module and the cross-warehouse power module. Since the power modules are set to multiple and the PDUs are also set to multiple, the PDUs and power modules are divided into different warehouses. Under normal circumstances, the power module responsible for allocation by the same PDU remains unchanged, that is, the local warehouse power module, while the power modules responsible for allocation by other PDUs are cross-warehouse power modules relative to the PDUs in the local warehouse. The time required for the PDU to dispatch the local warehouse module is shorter and safer. Therefore, when the dispatchable power is greater than the required power, it is preferred to determine whether the rated power of the local warehouse power module in the idle state is greater than or equal to the target dispatch power. If the rated power of the local warehouse power module in the idle state is greater than or equal to the target dispatch power, it means that the local warehouse power module in the idle state can meet the required power, and only the local warehouse power module is confirmed as the target input module, thereby limiting cross-warehouse scheduling.

[0070] S44, determining whether the target input module and the charging and discharging terminal meet a second condition, where the second condition is that the output voltage of the target input module and the battery voltage of the charging and discharging terminal are lower than the same voltage threshold and the target input module is in a shutdown state;

[0071] S45. If the power module and the charging and discharging terminal corresponding to the target scheduling power meet the second condition, determine whether the time for meeting the second condition is greater than a time threshold;

[0072] S46: If the time for satisfying the second condition is greater than the time threshold, control the corresponding relay to close to activate the target activation module.

[0073] In this embodiment, the voltage threshold is 60Vdc, and the time threshold is 30s. Before the target input module is connected to the charging and discharging terminal, it is determined whether it is in the off state. If it is, a shutdown command is sent to it to switch it to the off state. Furthermore, the second condition must be met only when the output voltage of the target input module falls below 60Vdc and the battery voltage of the charging and discharging terminal also falls below 60Vdc, ensuring smooth and safe power regulation. Furthermore, the second condition is monitored to ensure that the time it takes to meet the second condition exceeds 30s to avoid abnormal conditions that cause transient voltage fluctuations and lead to erroneous input operations, thereby ensuring smoother and safer power scheduling.

[0074] like Figure 7 As shown, in a further embodiment, S4, based on the target scheduling power, scheduling the corresponding power module through the power distribution module to cooperate with the charging and discharging terminal to perform energy transmission, further comprising:

[0075] S47. Acquire the grid load status in real time, and dynamically adjust the priority of scheduling power modules based on the grid load status and the power request information.

[0076] In this embodiment, the power control module obtains the grid load status in real time to determine whether it is during peak hours. If the grid load is during peak hours, when it receives discharge requests from multiple charging and discharging terminals simultaneously, due to the limited number of idle power modules, the charging and discharging terminals are prioritized based on the requested power obtained from each power request information, where the charging and discharging terminal with the greater requested power is ranked higher. When the power control module sends the power module information to be scheduled and the scheduling target terminal information to the power distribution module, it sends them in this priority order, so that the power distribution module preferentially dispatches power modules to the terminals with the highest ranking for energy transmission. This allows the power distribution module to prioritize the transmission of power modules to the terminals with the highest ranking for energy transmission during peak hours of the grid load, thereby enabling the power of vehicles with higher discharge efficiency to be preferentially transmitted to the grid, thereby more quickly reducing the grid load.

[0077] In a further embodiment, the power control module also receives in real time the charging pile temperature information, voltage information, and current information collected by the safety protection module in the charging and discharging terminal, and determines whether it exceeds the safety threshold. If it exceeds the safety threshold, a current limiting instruction or a power-off instruction is sent to the charging and discharging terminal to protect the charging and discharging terminal and ensure the safe operation of the smart charging pile system.

[0078] In this embodiment, when the internal temperature of the charging pile reaches a safety threshold, the power control module sends a current limiting instruction to the charging pile to reduce the transmission power; when the safety threshold is exceeded, the power control module sends a power-off instruction to the charging pile to cut off charging or discharging, preventing accidents such as high-temperature spontaneous combustion, and protecting the safety of the charging pile and new energy vehicles; the insulation detection function of the charging pile should be coordinated with the insulation detection function of the vehicle; when an emergency stop or fault occurs during the charging process, the charging pile can disconnect the DC output contactor within 100ms, and the DC output voltage should drop below 60V within 1s; the charging pile has an impact current limiting function, and the impact current should not exceed 110% of the rated input current; the charging pile has a battery reverse connection protection function; the charging pile has a battery voltage detection function before automatic charging; the charging pile has a locking device to prevent the charging connector from accidentally falling off during charging. During DC charging, the vehicle interface has a locking function, and the locking function should comply with the relevant requirements of GB / T20234.1; the charging pile has a function to prevent battery current backflow. The charging pile has a pre-charging function. When the charging pile detects that the DC contactor of the electric vehicle is closed, the charging pile should detect the battery terminal voltage; the charging pile needs to pre-charge after detecting the battery terminal voltage, and the output contactor of the charging pile can be closed only after the output voltage of the power module is increased to a difference of less than 10V from the measured value of the battery terminal voltage; the charging pile performs contactor contact sintering detection in each charging cycle. When the contactor contacts are detected to be sticky, the charging pile stops working; the charging pile ensures that the closure of the charging pile output contactor occurs after the vehicle DC charging contactor is closed, and the time interval is not less than 500ms; when the charging pile is in the charging stop state, the DC output circuit is ensured to be in the disconnected state; the charging pile has a gun tip temperature monitoring function, and can upload temperature information to the cloud platform.

[0079] An embodiment of the present invention also provides an intelligent charging pile system with efficient V2G function, which is used to implement the intelligent scheduling method provided in the above embodiment, wherein the intelligent charging pile system is connected to the power grid; the intelligent charging pile system includes a power cube and a charging and discharging terminal, and the power cube includes a power control module, a power distribution module and several power modules, wherein some power modules support bidirectional energy transmission, and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged into several groups; the power cube is communicatively connected to each of the charging and discharging terminals, and the power control module is communicatively connected to the power distribution module and the several power modules.

[0080] The V2G function significantly improves energy utilization efficiency, transforming charging piles from simple power-consuming devices into flexible adjustment units of the power grid. At the same time, the system supports dynamic power scheduling, which can adjust the charging and discharging strategies in real time according to the power grid load. It can support the differentiated charging needs of multiple vehicles at the same time, meeting both ultra-fast charging needs and ordinary fast charging. Compared with traditional charging piles, this flexible power distribution method greatly improves equipment utilization and reduces idle power waste.

[0081] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent scheduling method, characterized by: Applied to a smart charging pile system, the smart charging pile system is connected to a power grid; the smart charging pile system includes a power cube and a charging and discharging terminal, the power cube includes a power control module, a power distribution module, and several power modules, wherein some power modules support bidirectional energy transmission and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged in several groups; the scheduling method includes: S1. If the power control module receives power request information from the charging and discharging terminal, it collects the status of each power module in real time; S2. Calculate the required power and the dispatchable power according to the power request information and the power module status; S2, calculating the required power and the dispatchable power according to the power request information and the power module status, includes: S21. Determine whether the energy transmission request direction in the power request information is consistent with a supported direction of the currently configured power module; S22. If the energy transmission request direction is consistent with the supported direction of the currently configured power module, determine the difference between the requested power in the power request information and the rated power of the currently configured power module; S23. If the requested power is greater than the rated power of the currently configured power module, calculate the difference between the requested power and the rated power of the currently configured power module; S24. When the difference between the requested power and the rated power of the currently configured power module is greater than a first threshold, use the difference between the requested power and the rated power of the currently configured power module as the required power; S25. Calculate the sum of the rated powers of the power modules in the idle state as the dispatchable power; S3. Taking the smaller value of the required power and the schedulable power as the target scheduling power; S4. Based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal to perform energy transmission; Among them, S4, based on the target scheduling power, scheduling the corresponding power module through the power distribution module to cooperate with the charging and discharging terminal to perform energy transmission, including: S43. Based on the target dispatch power, the power module used to calculate the dispatchable power is confirmed as the target input module; S44, determining whether the target input module and the charging and discharging terminal meet a second condition, where the second condition is that the output voltage of the target input module and the battery voltage of the charging and discharging terminal are lower than the same voltage threshold and the target input module is in a shutdown state; S45. If the power module and the charging and discharging terminal corresponding to the target scheduling power meet the second condition, determine whether the time for meeting the second condition is greater than a time threshold; S46: If the time for satisfying the second condition is greater than the time threshold, control the corresponding relay to close to activate the target activation module.

2. The intelligent scheduling method according to claim 1, characterized in that: S25. Calculate the sum of the rated powers of the power modules in the idle state as the dispatchable power, including: S251. If the energy transmission request direction is from the grid to the vehicle, calculate the dispatchable power of the power module supporting unidirectional energy transmission; S252: If the energy transmission request direction is from vehicle to grid, calculate the dispatchable power of the power module supporting bidirectional energy transmission.

3. The intelligent scheduling method according to claim 1, characterized in that: S21, after determining whether the energy transmission request direction in the power request information is consistent with the supported direction of the currently configured power module, further comprising: S26: If the energy transmission request direction is inconsistent with the supported direction of the currently configured power module, mark the currently configured power module as a target switching-out module.

4. The intelligent scheduling method according to claim 3, characterized in that: S22: If the energy transmission request direction is consistent with the supported direction of the currently configured power module, after determining the difference between the requested power in the power request information and the rated power of the currently configured power module, the method further includes: S27. If the requested power is less than the rated power of the currently configured power module, calculate the difference between the rated power of the currently configured power module and the requested power; S28: When the difference between the rated power of the currently configured power module and the requested power is greater than a second threshold, mark the corresponding power module as a target switch-out module.

5. The intelligent scheduling method according to claim 4, characterized in that: S4. Based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal to perform energy transmission, including: S41, determining whether the target switching module meets a first condition, where the first condition is that the target switching module is in a shutdown state and the output current is lower than a current threshold; S42: If the target cut-out module meets a first condition, control the corresponding relay to be disconnected to cut out the target cut-out module.

6. The intelligent scheduling method according to claim 1, characterized in that: S43: Based on the target dispatch power, the power module used to calculate the dispatchable power is determined as the target input module, including: S431. Prioritize determining whether the rated power of the idle power module in the local compartment is greater than or equal to the target scheduling power. S432: If the rated power of the idle power module in the local compartment is greater than or equal to the target dispatching power, determine the power module in the local compartment as the target input module based on the target dispatching power. S433: If the rated power of the idle local power module is less than the target dispatching power, confirm that the local power module and the cross-compartment power module are both target input modules according to the target dispatching power.

7. The intelligent scheduling method according to claim 1, characterized in that: S4. Based on the target scheduling power, the power distribution module schedules the corresponding power module to cooperate with the charging and discharging terminal to perform energy transmission, further comprising: S47. Acquire the grid load status in real time, and dynamically adjust the priority of scheduling power modules based on the grid load status and the power request information.

8. A smart charging pile system with efficient V2G functionality, used to implement the smart scheduling method according to any one of claims 1 to 7, wherein the smart charging pile system is connected to a power grid; characterized in that: The smart charging pile system includes a power cube and a charging and discharging terminal. The power cube includes a power control module, a power distribution module and several power modules, wherein some power modules support bidirectional energy transmission, and other power modules support unidirectional energy transmission; the charging and discharging terminals are arranged in several groups; the power cube is communicatively connected to each of the charging and discharging terminals, and the power control module is communicatively connected to the power distribution module and the several power modules.

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