A charging cluster power dynamic scheduling method and system based on a ring topology and a charging pile

Abstract

This invention belongs to the field of charging scheduling technology, specifically relating to a dynamic power scheduling method, system, and charging pile for a charging cluster based on a ring topology. Responding to a request from the first charging gun, the system obtains the available power of the target charging pile. If the demand is met, power is supplied by the module of this pile. If the power supply is insufficient even after scheduling within a single-gun or dual-gun pile, adjacent charging piles are detected. If any are available, the third and fourth contactor groups are closed to utilize their power. If no adjacent piles are available, the system checks for distant piles across intermediate piles. If any are available, the third contactor group of the target pile, the fifth contactor group of the intermediate pile, and the sixth contactor group of the distant pile are closed, transferring the power of the distant module to the first charging gun via the busbar. This invention prioritizes the use of resources within the current charging pile and reduces busbar occupancy. When adjacent piles are not available, cross-pile scheduling expands the power source, improving power sharing in the ring topology and the overall system output capability, thus enhancing system reliability.

Description

Technical Field

[0001] This invention belongs to the field of charging scheduling technology, specifically relating to a method, system, and charging pile for dynamic power scheduling of charging clusters based on ring topology. Background Technology

[0002] In a ring topology charging network, power sharing is typically configured as follows: when the power of a charging station is insufficient, it requests an available module from the nearest neighboring station in a clockwise or counterclockwise direction. The power request from a station is rejected if the neighboring station is already charging at full power or if its available module has been used by another station. Even if a distant station one station away has a large number of available modules, the station cannot obtain that power because there is no switch path across intermediate stations on the busbar.

[0003] The existing solution requires disconnecting the charging module of the adjacent charging pile from its own charging gun and switching the module to the busbar when calling an idle module of an adjacent charging pile. This process causes the charging voltage of the charging gun of the adjacent charging pile to drop momentarily, triggering the protection mechanism of the vehicle's BMS, and may even terminate charging. Summary of the Invention

[0004] This invention provides a dynamic power scheduling method for charging clusters based on ring topology. The method realizes the scheduling and sharing of power modules within the charging pile cluster, integrates charging piles, and can aggregate idle modules of multiple piles to supply power when a single vehicle has high power demand, thereby improving the overall power output capacity and utilization rate of the charging station.

[0005] The methods include: S1: In response to the charging request initiated by the first charging gun, obtain the identification information of the target charging pile to which the first charging gun belongs and the gun identification of the first charging gun, and determine the available charging power of the target charging pile. S2: Determine whether the available charging power of the target charging station meets the power required for the charging request; S3: If satisfied, control the first contactor group inside the target charging pile to close, so that the local charging module of the target charging pile supplies power to the first charging gun. S4: If not satisfied, determine whether the target charging pile is a second type of charging pile with dual guns, and whether the charging module corresponding to the second charging gun on the second type of charging pile is in an idle state. S5: If the target charging pile is a second type of charging pile and the charging module of the second charging gun is idle, control the second contactor group inside the target charging pile to close, and dispatch the power of the charging module of the second charging gun to the first charging gun, so that it can be powered together with the charging module of this pile. S6: If the target charging pile is a first type of charging pile, or the charging module of the second charging gun is not idle, or the required power is still not met after scheduling in S5, then detect whether there is an idle charging module in the adjacent charging pile directly adjacent to the target charging pile through the bus copper busbar, and perform cross-pile scheduling according to the detection result.

[0006] According to another embodiment of this application, a dynamic power scheduling system for a charging cluster based on a ring topology is provided. The system includes: multiple charging piles, a first contactor group, a second contactor group, a third contactor group, a fourth contactor group, a fifth contactor group, and a sixth contactor group. Each charging station is equipped with a charging controller; multiple charging stations are connected to form a ring topology to realize cross-device scheduling and sharing of power resources; Multiple charging piles include several 80kW single-gun charging piles and several 160kW dual-gun charging piles; the 80kW single-gun charging piles are defined as the first type of charging piles; the 160kW dual-gun charging piles are defined as the second type of charging piles. The first contactor group connects the output terminal of the charging module of the target charging pile, which is configured in the first charging gun, to the DC output terminal of the first charging gun. The second contactor group connects the output terminal of the idle charging module corresponding to the second charging gun in the target charging pile to the DC output circuit bus of the first charging gun. The third contactor group connects the output terminal of the local charging module of the target charging pile to the copper busbar of the ring topology; The fourth contactor group connects the output terminal of the idle charging module of the adjacent charging pile to the copper busbar of the ring topology. The fifth contactor group consists of bus input contactors and bus output contactors for the intermediate charging pile, and is used to connect the copper busbar of the ring topology. The sixth contactor group connects the idle charging module output terminal of the remote charging pile to the copper busbar of the ring topology.

[0007] According to another embodiment of this application, a charging pile is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the dynamic power scheduling method for the charging cluster based on ring topology.

[0008] As can be seen from the above technical solutions, the present invention has the following advantages: This invention reads the gun identifier carried in the charging request and adds the rated power of the idle, fault-free module to obtain the available power of the charging pile. It compares the available power of the charging pile with the requested power; if the difference is non-negative, only the first contactor group is closed, and the module of this charging pile supplies power alone. If the power is insufficient and the target charging pile is a dual-gun type, the status of the module corresponding to the second charging gun is queried. If it is idle, the second contactor group is closed, and the other gun module is connected in parallel. If the power is still insufficient or the target charging pile is a single-gun type, a status query is sent to adjacent charging piles, and the flag bits in the response message are parsed. If an adjacent charging pile has an idle module, the third contactor group of the target charging pile and the fourth contactor group of the adjacent charging pile are closed, and the power of the adjacent charging pile module is introduced through the bus copper busbar. If no adjacent charging pile has an idle module, a query is sent to the distant charging pile one pile away. If the distant charging pile has an idle module, the third contactor group of the target charging pile, the fifth contactor group of the intermediate charging pile, and the sixth contactor group of the distant charging pile are closed, so that the power path crosses the intermediate charging pile to reach the target charging pile.

[0009] This invention provides a progressive power supply for high-power single-pile charging, eliminating the limitation of internal module capacity on charging capacity. The two power modules within a dual-pile are connected in parallel via a second contactor group, allowing for real-time allocation of modules from gun B when demand from gun A surges. A busbar connects the discrete piles into a ring-shaped power pool, allowing current from idle modules to flow directionally along the busbar. When drawing power from alternate piles, the intermediate pile serves only as a busbar channel, ensuring independent operation of each pile without interference from cross-current power. The power station does not need to configure grid capacity based on the peak power of a single pile; the overall power capacity is shared and distributed across the cluster, improving utilization. Attached Figure Description

[0010] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a dynamic power scheduling system for a charging cluster based on a ring topology. Figure 2 This is a schematic diagram of a system implementation example; Figure 3 This is a schematic diagram of another embodiment of the system; Figure 4 The flowchart shows the dynamic power scheduling method for charging clusters based on ring topology. Figure 5 This is a schematic diagram of a charging station. Detailed Implementation

[0012] like Figure 1As shown, the system corresponding to the dynamic power scheduling method for charging clusters based on ring topology provided by this invention is equipped with multiple 80kW single-gun charging piles 1 and multiple 160kW dual-gun charging piles 2, all with power sharing capabilities. The multiple 80kW single-gun charging piles 1 and multiple 160kW dual-gun charging piles 2 are connected to form a ring topology, integrating into a high-efficiency cluster charging network with a maximum output power of 250kW-600kW. This enables cross-device scheduling and sharing of power resources, allowing flexible use of power modules from idle devices in the network, thus doubling the overall maximum output capacity of the system.

[0013] The 80kW single-gun charging pile 1 of this invention has only one charging gun and is defined as a first type of charging pile. The 160kW dual-gun charging pile 2 has two charging guns and can perform cross-gun scheduling within the pile, and is defined as a second type of charging pile.

[0014] In the method of this invention, determining whether it is a second type of charging pile with dual guns and whether the second charging gun is idle is a capability only possessed by 160kW dual-gun charging piles. 80kW single-gun charging piles, however, directly perform cross-pile detection when their own power is insufficient.

[0015] like Figure 2 and Figure 3 As shown, the first contactor group, second contactor group, third contactor group, fourth contactor group, fifth contactor group, and sixth contactor group involved in this invention will be described below.

[0016] The first contactor group in this embodiment of the invention includes contactors 1K1 and 1K2. 1K1 is connected between the positive output terminal of the charging module and the positive busbar of the first charging gun, and 1K2 is connected between the negative output terminal of the charging module and the negative busbar of the first charging gun. These two contactors are arranged in the main circuit for power supply from the charging module to the charging gun.

[0017] The first contactor group is used to directly supply the output power of the charging module of this charging pile to the first charging gun. When the available power of this charging pile meets the charging demand, the first contactor group closes, and the module of this charging pile supplies power to the vehicle independently. When it is necessary to call a second charging gun or an adjacent charging pile, the first contactor group remains closed to provide a power path.

[0018] In this embodiment of the invention, the first contactor group represents the shortest path for the charging gun to acquire power, minimizing power transmission loss when closed. During cross-pile scheduling, the first contactor group remains closed, ensuring a continuous connection between the busbar and the charging gun and preventing power interruption.

[0019] The second contactor group in this embodiment of the invention includes contactors K8 and K9. K8 is connected between the positive output terminal of the charging module corresponding to the second charging gun and the positive busbar of the first charging gun, and K9 is connected between the negative output terminal and the negative busbar of the first charging gun. The second contactor group exists only inside the second type of charging pile.

[0020] The second contactor group is used to connect the power of the charging module associated with the second charging gun in the pile to the power supply circuit of the first charging gun in parallel. When the power of the first charging gun is insufficient and the module corresponding to the second charging gun is idle, the second contactor group closes, realizing cross-gun power sharing within the pile. The power path of the second contactor group is within the pile, without occupying the external busbar copper bus, reducing the busbar current load.

[0021] The third contactor group in this embodiment of the invention includes different contactors depending on the type of charging pile. For the first type of charging pile, the third contactor group includes K21, K22, K31, and K32. For the second type of charging pile, the third contactor group includes K21, K22, K31, and K32. These contactors are connected to the input and output terminals of the busbar copper bus of this pile, as well as between the charging module of this pile and the busbar copper bus. When power needs to be drawn from an adjacent pile or a distant pile, the third contactor group closes, allowing power from the ring busbar copper bus to be input to the target charging pile.

[0022] The design of the third contactor group allows the target charging pile to become the receiving end of the bus power when its own power is insufficient. By selecting to close only K21 and K22 without closing K31 and K32, the power can be controlled to enter from the left or right bus, adapting to the bidirectional characteristics of the ring topology.

[0023] The fourth contactor group includes K11 and K12 of the adjacent charging piles, corresponding to the first type of pile, or 1K11, 1K12, 2K11, and 2K12, corresponding to the second type of pile. These contactors are connected between the output terminal of the idle charging module of the adjacent pile and its own busbar. The fourth contactor group is used to feed the power of the idle charging module of the adjacent charging pile into the ring busbar. When the target charging pile needs to draw power from the adjacent pile, the fourth contactor group of the adjacent pile closes, connecting the output terminal of the idle module to the busbar, and the power flows to the target charging pile through the busbar.

[0024] The fourth contactor group is independent of the first contactor group of the adjacent pile. Therefore, while the adjacent pile lends out the module, its own first contactor group can remain open or closed without interference. Lending out the module does not require disconnecting the original charging circuit of the adjacent pile, thus avoiding voltage drops.

[0025] The fifth contactor group includes K31, K32, and K21, K22, or a corresponding set of busbar direct-connect contactors in the intermediate charging pile. These contactors are connected between the input and output terminals of the busbar copper bus of the intermediate pile, forming a bypass path that bypasses the charging module inside the intermediate pile.

[0026] The fifth contactor group is used to set the busbar copper bus of the intermediate charging pile to a straight-through mode when dispatching power to remote charging piles across intermediate charging piles. When the fifth contactor group is closed, the busbar copper bus directly connects from one side of the intermediate pile to the other side. The current does not pass through any charging modules of the intermediate pile, but only flows through the copper busbar, thus achieving the crossing. The fifth contactor group allows the intermediate charging pile to act as a relay node for power transmission even when it is charging itself. Since the current only flows through the copper busbar and does not enter the modules, the charging process of the intermediate pile is not affected in any way. This avoids interrupting the charging of the intermediate pile for crossing, improving the scheduling flexibility of the ring topology.

[0027] The sixth contactor group, comprising K11, K12, K31, and K32 of the remote charging pile, is connected between the output terminal of the idle charging module of the remote charging pile and its busbar. It has a similar structure to the fourth contactor group but operates on a more distant pile. It feeds the power of the idle charging module of the remote charging pile into the ring busbar, which passes through the intermediate pile to reach the target charging pile via a straight path. After the sixth contactor group closes, the power of the remote charging pile is injected into the busbar, crosses the intermediate pile, and is received by the third contactor group of the target pile.

[0028] The sixth contactor group, in conjunction with the fifth contactor group, achieves two-stage power dispatching, extending the power source range from adjacent piles to distant piles one pile away. Even when adjacent piles are busy in the station, idle resources further away can still be utilized, improving the overall resource utilization of the network. All contactor groups participating in the dispatching are independently controlled by their respective pile's charging controller, eliminating the need for a central dispatcher.

[0029] The following describes in detail the dynamic power scheduling method for charging clusters based on ring topology that relates to this application. Specific details, such as particular system structures and technologies, are presented for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details.

[0030] To facilitate a clear description of the technical solutions of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, nor do they necessarily imply that they are different.

[0031] The terms "one embodiment" or "some embodiments" used in this application mean that one or more embodiments of this application include the specific features, structures, or characteristics described in that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this application do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0032] Please see Figure 4 The diagram shows a flowchart of a dynamic power scheduling method for a charging cluster based on a ring topology in a specific embodiment. The method includes: S1: In response to the charging request initiated by the first charging gun, obtain the identification information of the target charging pile to which the first charging gun belongs and the gun identification of the first charging gun, and determine the available charging power of the target charging pile. S2: Determine whether the available charging power of the target charging pile meets the power required by the charging request; S3: If satisfied, control the first contactor group inside the target charging pile to close, so that the local charging module of the target charging pile directly supplies power to the first charging gun. S4: If not satisfied, determine whether the target charging pile is a second type of charging pile with dual guns, and whether the charging module corresponding to the second charging gun on the second type of charging pile is in an idle state. S5: If the target charging pile is a second type of charging pile and the charging module of the second charging gun is idle, then control the second contactor group inside the target charging pile to close, and dispatch the power of the charging module of the second charging gun to the first charging gun, so that it can be powered together with the charging module of the charging pile. S6: If the target charging pile is a first type of charging pile, or the charging module of the second charging gun is not idle, or the required power is still not met after S5 scheduling, then detect whether there is an idle charging module in the adjacent charging pile directly adjacent to the target charging pile through the bus copper busbar. S7: Perform cross-stub scheduling based on the detection results: If there is an idle charging module in the adjacent charging pile, the third contactor group of the target charging pile is controlled to close with the fourth contactor group of the adjacent charging pile, and the power of the idle charging module of the adjacent charging pile is dispatched to the first charging gun through the bus copper bus. If the adjacent charging pile does not have an available charging module, then the system continues to detect whether there is an available charging module in the distant charging pile that is separated from the target charging pile by one intermediate charging pile. If there is, the system controls the third contactor group of the target charging pile, the fifth contactor group of the intermediate charging pile, and the sixth contactor group of the distant charging pile to close, so that the bus copper busbar crosses the intermediate charging pile and dispatches the power of the available charging module of the distant charging pile to the first charging gun.

[0033] In some embodiments, the power scheduling response speed is adapted to the real-time control requirements of the charging system, and the power interconnection of multiple charging piles is realized by combining a single busbar copper bus. Idle power modules within the charging station can be called across piles and across devices. The method realizes the scheduling and sharing of power modules within the charging pile cluster, and allocates charging volume according to the vehicle charging power demand, thereby improving the power output capacity and utilization rate of the charging station.

[0034] In an exemplary embodiment, the specific implementation of determining the available charging power of the target charging pile in step S1 includes the following steps: S11: The charging controller of the target charging pile receives the charging handshake message sent by the first charging gun through the charging gun communication line, parses the charging handshake message to extract the charging demand voltage and charging demand current sent by the vehicle battery management system, and reads the current output voltage, current output current and operating status code of each power module of the target charging pile. Based on the operating status code, it filters the power modules that are in normal operating state, and accumulates the rated power values ​​of each selected power module to obtain the rated total power of the target charging pile. S12: The charging controller of the target charging pile reads the current charging status indicator of the first charging gun and determines whether the first charging gun is in a state where a charging task is already being executed. If it is in a state where a charging task is already being executed, the power value currently allocated to other charging guns is deducted from the rated total power of the pile to obtain the available charging power of the pile. If it is not in a state where a charging task is already being executed, the rated total power of the pile is used as the available charging power of the pile.

[0035] In some embodiments, the charging controller parses the charging handshake message, extracts the charging voltage value requested by the vehicle battery management system from the charging demand voltage field, and extracts the charging current value requested by the vehicle battery management system from the charging demand current field. The charging controller updates the current output voltage, current output current, and operating status code of each power module. The operating status code indicates the operating status of the power module, where a value of 0 indicates standby, a value of 1 indicates normal operation, a value of 2 indicates a fault, and a value of 3 indicates a protection shutdown. The charging controller filters out power modules with an operating status code of value 1 and reads the rated power value marked on the nameplate of each filtered power module. The charging controller arithmetically sums the rated power values ​​of the filtered power modules, and the sum is used as the rated total power of the target charging pile.

[0036] In some embodiments, the power deduction method ensures the authenticity and accuracy of the available charging power of the charging station. In dual-gun charging station applications, because the second charging gun may have already occupied some power module resources, without deduction calculation, the available power of the first charging gun will be overestimated, leading to power allocation charging interruption. Real-time calculation of the available charging power of the charging station allows the charging station to adjust power allocation according to real-time operating conditions, improving the utilization efficiency of power resources and the reliability of charging services.

[0037] In an exemplary embodiment, step S2, determining whether the available charging power of the target charging pile meets the power required for the charging request, specifically includes the following steps: S21: The charging controller of the target charging pile extracts the charging demand voltage and charging demand current from the charging handshake message, multiplies the charging demand voltage and charging demand current to obtain the power required for the charging request; obtains the current output voltage and current output current of each power module in normal operation, multiplies the current output voltage and current output current of each power module respectively and then sums them to obtain the real-time calculated value of the available charging power of this pile. S22: The charging controller compares the real-time calculated value of the available charging power of this charging station with the required power. If the real-time calculated value is greater than or equal to the required power, it is determined that the available charging power of this charging station meets the required power of the charging request; if the real-time calculated value is less than the required power, it is determined that the available charging power of this charging station does not meet the required power of the charging request.

[0038] In some embodiments, the power calculation method based on real-time output voltage and current ensures that the real-time calculated value of the available charging power reflects the actual output capability of the power modules, rather than the theoretical rated value. The method of calculating and summing the power outputs of each power module independently allows the charging controller to identify the output of individual power modules. When the vehicle's power demand equals the available power of the charging station, the charging station can start charging normally. The judgment result enables the charging controller to respond quickly to charging requests, reducing vehicle waiting time and improving the utilization rate of the charging station.

[0039] In an exemplary embodiment, step S4, which determines whether the target charging pile is a second type of charging pile with dual charging guns and whether the charging module corresponding to the second charging gun on the second type of charging pile is in an idle state, specifically includes the following steps: S41: The charging controller of the target charging pile sends a start command to the charging module of the local pile belonging to the first charging gun, controls the charging module of the local pile to enter the pre-charging state, and collects the DC output voltage of the charging module of the local pile and the bus voltage of the output circuit of the first charging gun in real time. S42: When the absolute value of the difference between the DC output voltage of the charging module and the bus voltage of the first charging gun output circuit is less than the preset voltage following threshold, a closing drive signal is generated for the first contactor group, controlling the first contactor group to engage and conduct, and adjusting the output current of the charging module to the target current value required by the charging request.

[0040] In some embodiments, the charging controller of the target charging pile sends a power-on and voltage setting command to the power module belonging to the charging gun. Upon receiving the command, the power module's internal soft-start circuit activates, and the output voltage begins to rise. The charging controller simultaneously monitors the actual voltage value at the power module's output terminal and the voltage value on the contactor load side. At this time, the first contactor group is in the open state, and the voltage value on the contactor load side is clamped to zero by the vehicle battery voltage.

[0041] The charging controller calculates the difference ΔV between the actual voltage value collected in step S41 and the voltage value on the contactor load side. Only when |ΔV| < Δ preset voltage difference threshold, a high-level signal is output to the coil of the first contactor group, causing the contactor to engage. After the contactor closes, the circuit is connected. Based on the current demand in the charging request, the output current of the charging module of this charging station is adjusted to stabilize at the target current value, ensuring the smoothness of power supply to the vehicle and improving the charging experience.

[0042] In an exemplary embodiment, if the target charging pile is a second type of charging pile and the charging module of the second charging gun is idle in step S5, then the second contactor group inside the target charging pile is closed to allocate the power of the charging module of the second charging gun to the first charging gun, so that it shares power with the charging module of this pile. Specifically, this includes the following steps: S51: The charging controller of the target charging pile sends a voltage synchronization command to the idle charging module corresponding to the second charging gun, controls the output to be equal to the target voltage value of the bus voltage of the first charging gun output circuit, and monitors the difference between the output voltage and the bus voltage of the first charging gun output circuit in real time. S52: When the absolute value of the difference is less than the preset voltage synchronization threshold for a number of consecutive preset control cycles, the charging controller generates a closing drive signal for the second contactor group, controls the second contactor group to engage and conduct, and synchronously adjusts the output current of the idle charging module to the target allocation value.

[0043] In some embodiments, the charging controller sends a voltage setting command to the idle power module associated with the second charging gun. The command includes the current bus voltage value of the first charging gun's output circuit. Upon receiving the command, the idle module initiates its internal closed-loop control algorithm, adjusting the PWM duty cycle of its DC-DC converter to gradually bring the output voltage closer to the bus voltage value. The charging controller acquires the values ​​of the output voltage and the bus voltage in real time through an isolated sampling circuit, calculating the instantaneous difference ΔVx as the basis for determining the voltage synchronization state. This process continues until ΔVx reaches a stable convergence state.

[0044] Furthermore, the charging controller continuously monitors ΔVx over several cycles. If |ΔV| < a preset instantaneous difference threshold (ranging from 3V to 8V) within each control cycle, it is recorded as a valid synchronization state. When this condition is met for three consecutive cycles, voltage synchronization is considered complete.

[0045] Furthermore, the charging controller applies the rated operating voltage to the coil of the second contactor group via an optocoupler-isolated drive circuit, ensuring reliable engagement. After the contactor closes, a current distribution command is sent to the idle module, requiring its output current to be gradually injected into the first charging gun circuit according to a preset ratio. The current distribution after the contactor closes employs a gradual adjustment to avoid sudden voltage drops or module overcurrent protection due to sudden load increases.

[0046] In one exemplary embodiment, step S7 involves a method for scheduling across intermediate charging piles, specifically including the following steps: S71: If there is no available charging module in the adjacent charging pile, send a handshake detection signal containing the target voltage level and power requirement value to the remote charging pile that is separated from the target charging pile by one intermediate charging pile, and receive the module status response signal fed back by the remote charging pile to confirm whether there is a matching available charging module in the remote charging pile. S72: After confirming that there is an idle charging module in the remote charging pile, a direct control command is sent to the intermediate charging pile to control the fifth contactor group of the intermediate charging pile to close simultaneously, so that the bus copper bus of the intermediate charging pile is connected, and the ring bus copper bus does not pass through the local charging circuit of the intermediate charging pile.

[0047] S73: After the direct connection state of the intermediate charging pile is established, the third contactor group of the target charging pile is closed, and the sixth contactor group of the remote charging pile is closed simultaneously to construct a DC power supply circuit from the idle charging module of the remote charging pile, through the connection of the intermediate charging pile, to the target charging pile.

[0048] In some embodiments, the controller of the target charging pile generates a data packet containing the voltage platform required by the current charging gun and the remaining power gap. This data packet is transmitted to the remote charging pile controller, which is one node away in logical address. After receiving the data packet, the remote charging pile parses the voltage platform parameters and queries the occupancy status of the power modules. If a power module with a matching voltage and in an idle state exists, the remote charging pile controller generates a response signal containing a module ready flag and sends it back to the target charging pile.

[0049] Furthermore, the circuit topology of the intermediate charging pile located between the target charging pile and the remote charging pile is reconfigured. The target charging pile controller sends a command to the intermediate charging pile controller. Upon receiving the command, the intermediate charging pile controller drives the fifth contactor group connecting the input and output terminals of its internal ring bus to close. The DC bus copper bus inside the intermediate charging pile is configured in a straight-through mode, with the current path bypassing the power module output circuit and the local charging gun circuit inside the intermediate charging pile, directly connecting the ring bus at the input terminal and the ring bus at the output terminal.

[0050] Furthermore, upon receiving the through-connection completion signal from the intermediate charging pile, the target charging pile controller closes the third contactor group and simultaneously sends a closing command to the remote charging pile. The remote charging pile then closes the sixth contactor group connecting its power module to the busbar. Current flows from the positive terminal of the power module of the remote charging pile, through the remote busbar contactor, the ring busbar, the through-connection contactor of the intermediate charging pile, and the busbar connection contactor of the target charging pile, finally flowing into the charging gun circuit of the target charging pile. This ensures the establishment of the DC power supply circuit and improves the equipment utilization rate and maximum output capacity of the charging station.

[0051] To illustrate the above implementation methods, a specific embodiment is given below: A distributed DC integrated charging system deployed at a public charging station was selected. The system contains four charging devices: #3, #4, #5, and #6. Among them, #5 is a 160kW dual-gun charging pile, and gun A is the first charging gun for this charging. #3, #4, and #6 are 80kW single-gun charging piles. The four devices are connected in a ring topology through a DC bus copper busbar and a set of communication lines.

[0052] After the A gun of the No. 5 pile is physically connected to the vehicle to be charged, it initiates a charging request. The No. 5 pile charging controller reads the unique identifier of the pile body and the A gun position identifier. At the same time, it collects the output status of the power module of the pile and the on / off signal of the power sharing contactor through the hardware current sampling circuit to determine that the available charging power of the pile is 80kW.

[0053] Furthermore, the power demand uploaded by the vehicle's BMS gradually increases to 180kW, and the charging controller determines through a hardware comparison circuit that the available power of this charging station cannot meet the charging demand.

[0054] Furthermore, Pile #5 is a dual-gun Type II charging pile. The charging controller detects that the charging module corresponding to Gun B has no output current through current sampling and determines that the module is in an idle state.

[0055] Furthermore, the charging controller maintains the conducting state of the first contactor group, sends a drive command to the second contactor group, and engages it, merging the idle charging module of gun B into the charging circuit of gun A. The total output power of this charging station is increased to 160kW, but it still cannot meet the continuously increasing power demand of the vehicle.

[0056] Furthermore, the system determined that cross-pile scheduling needed to be performed. By detecting piles 4 and 6, which are directly adjacent to pile 5, through the communication line, the detection results showed that piles 4 and 6 were both in a full-load charging state with no idle charging modules.

[0057] Furthermore, the system continues to detect the far end pile #3, which is separated from pile #5 by intermediate pile #4. Upon confirming that pile #3 has an idle charging module, the charging controller synchronously sends control commands via the communication line, closing the third contactor group of pile #5, the fifth contactor group of pile #4, and the sixth contactor group of pile #3. The fifth contactor group of pile #4 disconnects the direct connection between its charging circuit and the busbar copper bus, allowing the busbar copper bus to cross pile #4 and directly connect pile #5 and pile #3. The power of the idle charging module at pile #3 is transmitted to gun A at pile #5 via the busbar copper bus, and the total output power meets the vehicle's charging needs.

[0058] During the charging process, the system monitors the vehicle's current demand in real time. When the vehicle's power demand decreases, the charging controller disconnects the corresponding shared contactor in sequence, cutting off the power modules of the B guns of pile #3 and pile #5, while only keeping the charging module of pile #5 powered. After the vehicle is fully charged, the charging controller disconnects the first contactor group of pile #5, terminating the entire charging process.

[0059] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0060] like Figure 5 As shown, this application also provides a charging pile, including a display module 103, a memory 102, a processor 101, a communication module 104, and a computer program stored in the memory and executable on the processor 101. When the processor 101 executes the program, it implements the steps of a dynamic power scheduling method for a charging cluster based on a ring topology.

[0061] In embodiments of the present invention, charging stations include, but are not limited to, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Charging stations can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the embodiments described and / or claimed herein.

[0062] In this embodiment, processor 101 may be implemented using at least one of an application-specific integrated circuit, a programmable logic device, a field-programmable gate array, a processor, a controller, a microcontroller, a microprocessor, or an electronic unit designed to perform the functions described herein. In some cases, such an implementation may be implemented within a controller. For software implementation, implementations such as processes or functions may be implemented with separate software modules that allow the performance of at least one function or operation. Software code may be implemented by a software application (or program) written in any suitable programming language, and the software code may be stored in memory and executed by the controller.

[0063] The display module 103 is used to display information input by the user or information provided to the user. The display module 103 may include a display panel, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like.

[0064] The memory 102 can be used to store software programs and various data. The memory 102 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0065] The communication module 104 transmits radio signals to and / or receives radio signals from at least one of a base station, an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data sent and / or received according to text and / or multimedia messages.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for dynamic power scheduling of charging clusters based on ring topology, characterized in that, The methods include: S1: In response to the charging request initiated by the first charging gun, obtain the identification information of the target charging pile to which the first charging gun belongs and the gun identification of the first charging gun, and determine the available charging power of the target charging pile. S2: Determine whether the available charging power of the target charging station meets the power required for the charging request; S3: If satisfied, control the first contactor group inside the target charging pile to close, so that the local charging module of the target charging pile supplies power to the first charging gun. S4: If not satisfied, determine whether the target charging pile is a second type of charging pile with dual guns, and whether the charging module corresponding to the second charging gun on the second type of charging pile is in an idle state. S5: If the target charging pile is a second type of charging pile and the charging module of the second charging gun is idle, control the second contactor group inside the target charging pile to close, and dispatch the power of the charging module of the second charging gun to the first charging gun, so that it can be powered together with the charging module of this pile. S6: If the target charging pile is a first type of charging pile, or the charging module of the second charging gun is not idle, or the required power is still not met after scheduling in S5, then detect whether there is an idle charging module in the adjacent charging pile directly adjacent to the target charging pile through the bus copper busbar, and perform cross-pile scheduling according to the detection result. The specific steps for cross-stub scheduling based on the detection results in S6 are as follows: If there is an idle charging module in the adjacent charging pile, the third contactor group of the target charging pile and the fourth contactor group of the adjacent charging pile are closed, and the power of the idle charging module of the adjacent charging pile is dispatched to the first charging gun through the bus copper bus. The cross-stub scheduling in S6 based on the detection results also includes the following steps: If there is no available charging module in the adjacent charging pile, then continue to check if there is an available charging module in the far-end charging pile that is separated from the target charging pile by one intermediate charging pile. If there is, then control the third contactor group of the target charging pile, the fifth contactor group of the intermediate charging pile and the sixth contactor group of the far-end charging pile to close, so that the bus copper bus crosses the intermediate charging pile and dispatches the power of the available charging module of the far-end charging pile to the first charging gun. Step S6 is followed by a method for scheduling across intermediate charging stations, specifically including: S71: If there is no available charging module in the adjacent charging pile, send a handshake detection signal containing the target voltage level and power requirement value to the remote charging pile that is separated from the target charging pile by one intermediate charging pile, and receive the module status response signal fed back by the remote charging pile to confirm whether there is a matching available charging module in the remote charging pile. S72: After confirming that there is an idle charging module in the remote charging pile, a direct control command is sent to the intermediate charging pile to control the fifth contactor group of the intermediate charging pile to close simultaneously, so that the bus copper bus of the intermediate charging pile is connected, and the ring bus copper bus does not pass through the local charging circuit of the intermediate charging pile. S73: After the direct connection state of the intermediate charging pile is established, the third contactor group of the target charging pile is closed, and the sixth contactor group of the remote charging pile is closed simultaneously to construct a DC power supply circuit from the idle charging module of the remote charging pile, through the connection of the intermediate charging pile, to the target charging pile.

2. The dynamic power scheduling method for charging clusters based on ring topology according to claim 1, characterized in that, The specific implementation method for determining the available charging power of the target charging pile in step S1 includes the following steps: S11: The charging controller of the target charging pile receives the charging handshake message sent by the first charging gun through the charging gun communication line, parses the charging handshake message to extract the charging demand voltage and charging demand current sent by the vehicle battery management system, and reads the current output voltage, current output current and operating status code of each power module of the target charging pile. Based on the operating status code, it filters the power modules that are in normal operating state, and accumulates the rated power values ​​of each selected power module to obtain the rated total power of the target charging pile. S12: The charging controller of the target charging pile reads the current charging status indicator of the first charging gun and determines whether the first charging gun is in a state where a charging task is already being executed. If it is in a state where a charging task is already being executed, the power value currently allocated to other charging guns is deducted from the rated total power of the pile to obtain the available charging power of the pile. If it is not in a state where a charging task is already being executed, the rated total power of the pile is used as the available charging power of the pile.

3. The power dynamic scheduling method for charging clusters based on ring topology according to claim 1, characterized in that, Step S2, determining whether the available charging power of the target charging station meets the power required for the charging request, specifically includes the following steps: S21: The charging controller of the target charging pile extracts the charging demand voltage and charging demand current from the charging handshake message, multiplies the charging demand voltage and charging demand current to obtain the power required for the charging request; obtains the current output voltage and current output current of each power module in normal operation, multiplies the current output voltage and current output current of each power module respectively and then sums them to obtain the real-time calculated value of the available charging power of this pile. S22: The charging controller compares the real-time calculated value of the available charging power of this charging station with the required power. If the real-time calculated value is greater than or equal to the required power, it is determined that the available charging power of this charging station meets the required power of the charging request; if the real-time calculated value is less than the required power, it is determined that the available charging power of this charging station does not meet the required power of the charging request.

4. The dynamic power scheduling method for charging clusters based on ring topology according to claim 1, characterized in that, Step S4, determining whether the target charging pile is a second-type charging pile with dual charging guns and whether the charging module corresponding to the second charging gun on the second-type charging pile is in an idle state, specifically includes the following steps: S41: The charging controller of the target charging pile sends a start command to the charging module of the local pile belonging to the first charging gun, controls the charging module of the local pile to enter the pre-charging state, and collects the DC output voltage of the charging module of the local pile and the bus voltage of the output circuit of the first charging gun in real time. S42: When the absolute value of the difference between the DC output voltage of the charging module and the bus voltage of the first charging gun output circuit is less than the preset voltage following threshold, a closing drive signal is generated for the first contactor group, controlling the first contactor group to engage and conduct, and adjusting the output current of the charging module to the target current value required by the charging request.

5. The method for dynamic power scheduling of charging clusters based on ring topology according to claim 1, characterized in that, S5 specifically includes the following steps: S51: The charging controller of the target charging pile sends a voltage synchronization command to the idle charging module corresponding to the second charging gun, controls the output to be equal to the target voltage value of the bus voltage of the first charging gun output circuit, and monitors the difference between the output voltage and the bus voltage of the first charging gun output circuit in real time. S52: When the absolute value of the difference is less than the preset voltage synchronization threshold for a number of consecutive preset control cycles, the charging controller generates a closing drive signal for the second contactor group, controls the second contactor group to engage and conduct, and synchronously adjusts the output current of the idle charging module to the target allocation value.

6. A dynamic power scheduling system for charging clusters based on ring topology, characterized in that, The system is used for the dynamic power scheduling method of charging cluster based on ring topology as described in any one of claims 1 to 5; the system includes: multiple charging piles, a first contactor group, a second contactor group, a third contactor group, a fourth contactor group, a fifth contactor group, and a sixth contactor group. Each charging station is equipped with a charging controller; multiple charging stations are connected to form a ring topology to realize cross-device scheduling and sharing of power resources; Multiple charging piles include several 80kW single-gun charging piles and several 160kW dual-gun charging piles; the 80kW single-gun charging piles are defined as the first type of charging piles; the 160kW dual-gun charging piles are defined as the second type of charging piles. The first contactor group connects the output terminal of the charging module of the target charging pile, which is configured in the first charging gun, to the DC output terminal of the first charging gun. The second contactor group connects the output terminal of the idle charging module corresponding to the second charging gun in the target charging pile to the DC output circuit bus of the first charging gun. The third contactor group connects the output terminal of the local charging module of the target charging pile to the copper busbar of the ring topology; The fourth contactor group connects the output terminal of the idle charging module of the adjacent charging pile to the copper busbar of the ring topology. The fifth contactor group consists of bus input contactors and bus output contactors for the intermediate charging pile, and is used to connect the copper busbar of the ring topology. The sixth contactor group connects the idle charging module output terminal of the remote charging pile to the copper busbar of the ring topology.

7. A charging pile, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the dynamic power scheduling method for charging clusters based on ring topology as described in any one of claims 1 to 5.

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