Charging pile power distribution method and charging pile power distribution system

Abstract

The invention provides a charging pile power distribution method and a charging pile power distribution system, and relates to the technical field of charging control. The method comprises the steps that charging demand power of charging equipment currently connected to a charging pile is acquired, power supply information of each power unit in the current charging pile is acquired, each power unit corresponds to at least one child node, and each child node is a power unit directly connected with the power unit; determining at least one target power unit corresponding to the charging equipment according to the charging demand power, the power supply information of a direct connection power unit connected with the charging equipment and the power supply information of each child node of the direct connection power unit; and performing power distribution on each target power unit according to the power supply information and the charging demand power of each target power unit. According to the charging pile power distribution method based on tree search, the problem of uneven charging power distribution is effectively solved, and the limitation of a traditional dynamic distribution method is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of charging control, and more particularly, to a method and a system for power distribution of a charging stack. Background Art

[0002] With the rapid development of the electric vehicle industry, as a key facility for energy replenishment of electric vehicles, the construction and operation efficiency of the charging stack is directly related to the charging experience of electric vehicle users and the operation efficiency of the entire transportation system. However, the charging stack faces severe challenges in meeting the charging demand during peak hours.

[0003] Currently, the traditional power distribution methods include two types: static distribution method and dynamic distribution method. The static distribution method refers to fixed power distribution according to set rules without considering real-time charging demand, while the dynamic distribution method refers to dynamic distribution based on the access sequence and maximum power demand of charging devices.

[0004] However, in practical applications, the above methods cannot effectively meet the charging demands of all users, and there are also problems such as extended charging waiting time, degraded user experience, and resource waste. Therefore, how to efficiently achieve power distribution of the charging stack is particularly important. Summary of the Invention

[0005] The purpose of the present application is to provide a method and a system for power distribution of a charging stack to address the limitations of the existing power distribution methods that cannot effectively meet the charging demands of all users, and also have problems such as extended charging waiting time, degraded user experience, and resource waste.

[0006] To achieve the above object, the technical solutions adopted in the embodiments of the present application are as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for power distribution of a charging stack, the method comprising:

[0008] Obtaining the charging demand power of the charging devices currently connected to the charging stack, and obtaining the power supply information of each power unit in the current charging stack, wherein each power unit corresponds to at least one sub-node, and each sub-node is a power unit directly connected to the power unit, and the power supply information includes the maximum power supply and the current input state;

[0009] Determining at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each sub-node of the direct-connected power unit;

[0010] Perform power distribution for each of the target power units according to the power supply information of each of the target power units and the charging demand power.

[0011] As a possible implementation, the determining of at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each sub-node of the direct-connected power unit includes:

[0012] If the charging demand power is greater than the maximum power supply of the direct-connected power unit, determine the current input states of each sub-node of the direct-connected power unit, where the current input states include: idle state, input state, and application for input state;

[0013] Determine at least one of the target power units according to the current input states and priorities of each sub-node of the direct-connected power unit, and the remaining demand power, where the remaining demand power is the difference between the charging demand power and the maximum power supply of the direct-connected power unit.

[0014] As a possible implementation, the determining of at least one of the target power units according to the current input states and priorities of each sub-node of the direct-connected power unit, and the remaining demand power includes:

[0015] A. Determine the current sub-node according to the current input states and priorities of each sub-node of the direct-connected power unit;

[0016] B. Add the current sub-node to the sub-node set;

[0017] C. If the sum of the maximum power supplies of all sub-nodes in the sub-node set is greater than the remaining demand power, then use all sub-nodes in the sub-node set as the target power units and end the loop;

[0018] D. Otherwise, re-execute steps A - D.

[0019] As a possible implementation, the determining of the current sub-node according to the current input states and priorities of each sub-node of the direct-connected power unit includes:

[0020] If there are sub-nodes among all sub-nodes of the direct-connected power unit that have not been added to the sub-node set, then use the sub-node with the highest priority and the current input state of idle state among the sub-nodes that have not been added to the sub-node set as the current sub-node;

[0021] If all child nodes of the direct-connected power unit are added to the set of child nodes, or the current input states of the child nodes that have not been added to the set of child nodes are not in the idle state, then according to the priorities of the child nodes of the direct-connected power unit, a target child node is determined, and a child node of the target child node is selected as the current child node.

[0022] As a possible implementation, after obtaining the charging demand power of the charging device currently connected to the charging pile, it further includes:

[0023] Determine whether the charging demand power overflows, and determine whether the current input state of the direct-connected power unit is the target state, where the target state is the input state or the applied input state;

[0024] If the charging demand power overflows, or the current input state of the direct-connected power unit is the target state, then determine a third power unit to be withdrawn from at least one input power unit in the charging pile, and control the third power unit to withdraw from the input.

[0025] As a possible implementation, determining whether the charging demand power overflows includes:

[0026] Based on the available power supply of each power unit in the current charging pile, determine the target remaining power of the charging pile, where the target remaining power is the sum of the available power supplies of the remaining power units in the charging pile after reducing one power unit;

[0027] If the target remaining power is greater than the charging demand power, it is determined that the charging demand power overflows.

[0028] As a possible implementation, determining a third power unit to be withdrawn from at least one input power unit in the charging pile and controlling the third power unit to withdraw from the input includes:

[0029] If the current input state of the direct-connected power unit is the target state, then use the direct-connected power unit as the input power unit, and start withdrawing from the end child nodes according to the priorities of the child nodes of the input power unit. If the current available power supply of the charging pile is greater than the charging demand power after the end child node withdraws from the input, then use the end child node as the third power unit and control the third power unit to withdraw from the input.

[0030] As a possible implementation, after controlling the third power unit to withdraw from the input, it further includes:

[0031] Wait for a preset time, and determine the actual available power of the current charging pile and the current required power of the charging device currently connected to the charging pile;

[0032] According to the actual available power of the current charging pile and the current required power of the charging device currently connected to the charging pile, determine the adjustment strategy for the power units in the charging pile. The adjustment strategy includes an operation of adding investment or an operation of reducing investment, and the priority of the operation of reducing investment is higher than that of the operation of adding investment.

[0033] As a possible implementation manner, the method further includes:

[0034] According to the connection information of each power unit in the charging pile, determine the child nodes of each power unit and the priority of each child node.

[0035] In a second aspect, an embodiment of the present application provides a charging pile power distribution system, including: a charging pile and a control device. The charging pile includes a plurality of power units, and the plurality of power units are connected in parallel through contactors, and each power unit is respectively connected with an output gun muzzle;

[0036] The control device is configured to execute the steps in the charging pile power distribution method described in any one of the first aspects above.

[0037] In a third aspect, an embodiment of the present application provides a control device, including: a processor, a storage medium, and a bus. The storage medium stores machine-readable instructions executable by the processor. When the control device runs, the processor communicates with the storage medium through the bus, and the processor executes the machine-readable instructions to execute the steps in the charging pile power distribution method described in any one of the first aspects above.

[0038] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps in the charging pile power distribution method described in any one of the first aspects above.

[0039] According to the charging pile power distribution method and charging pile power distribution system of the embodiments of the present application, obtain the charging demand power of the charging devices currently connected to the charging pile, and obtain the power supply information of each power unit in the current charging pile. According to the charging demand power, the power supply information of the direct connection power unit to which the charging device is connected, and the power supply information of each sub-node of the direct connection power unit, determine at least one target power unit corresponding to the charging device. According to the power supply information and charging demand power of each target power unit, perform power distribution on each target power unit. Among them, each power unit corresponds to at least one sub-node, and each sub-node is a power unit directly connected to the power unit. The power supply information includes the maximum power supply and the current input state. According to the embodiments of the present application, each power unit serves as a node of a tree, and its sub-nodes are the power units directly connected to it. By introducing a tree structure to represent the relationship between each power unit and its sub-nodes in the charging pile, when power needs to be distributed to a charging device, based on the tree structure, the search and distribution of power units can be efficiently performed. Specifically, according to the charging demand power, the power supply information of the direct connection power unit and its sub-nodes, at least one target power unit is determined, further ensuring the rationality and efficiency of power distribution. And after determining the target power unit, perform balanced distribution of power according to the power supply information and charging demand power of each target power unit, thereby avoiding the problem of uneven power distribution and ensuring the effective utilization of resources. Therefore, the present application provides a charging pile power distribution method based on tree search, realizing the precise matching of charging demand and power supply capacity, and effectively solving the problems existing in the existing power distribution methods through an intelligent target power unit selection and dynamic adjustment mechanism. While improving the power distribution efficiency and user experience of the charging pile, it also promotes the rational utilization of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0041] Figure 1 Shows a topology diagram of a split pile system design of a multi-gun supported multi-dimensional closed path provided by an embodiment of the present application;

[0042] Figure 2 Shows a structural diagram of a split pile system design of a multi-gun supported multi-dimensional closed path provided by an embodiment of the present application;

[0043] Figure 3 Shows a schematic flow chart of a charging pile power distribution method provided by an embodiment of the present application;

[0044] Figure 4 Shows a schematic flowchart of a method for determining a target power unit provided by an embodiment of the present application;

[0045] Figure 5 Shows a schematic flowchart of another method for determining a target power unit provided by an embodiment of the present application;

[0046] Figure 6 Shows a schematic diagram of a tree structure provided by an embodiment of the present application;

[0047] Figure 7 Shows another schematic diagram of a tree structure provided by an embodiment of the present application;

[0048] Figure 8 Shows still another schematic diagram of a tree structure provided by an embodiment of the present application;

[0049] Figure 9 Shows a schematic flowchart of a method for exiting and inputting provided by an embodiment of the present application;

[0050] Figure 10 Shows a schematic diagram of a tree search provided by an embodiment of the present application;

[0051] Figure 11 Shows a schematic flowchart of a method for increasing input provided by an embodiment of the present application;

[0052] Figure 12 Shows a schematic flowchart of a method for decreasing input provided by an embodiment of the present application;

[0053] Figure 13 Shows a schematic diagram of the structure of a control device provided by an embodiment of the present application. Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the accompanying drawings in the present application are only for the purposes of illustration and description, and are not used to limit the protection scope of the present application. Additionally, it should be understood that the schematic drawings are not drawn to actual scale. The flowcharts used in the present application show operations implemented according to some embodiments of the present application. It should be understood that the operations in the flowchart may not be implemented in sequence, and steps without a logical context relationship may be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present application.

[0055] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0056] It should be noted that the term "including" will be used in the embodiments of the present application to indicate the existence of the features stated thereafter, but does not exclude the addition of other features.

[0057] Aiming at the problems existing in existing ordinary charging piles, such as unreasonable power distribution, excessive occupation of charging modules by a single charging device, and the inability of redundant charging modules to be cross-gun distributed to charging devices with large power requirements, the present application provides a charging pile power distribution method based on tree search, adopting a static low-power plus dynamic power distribution scheme, which is used to provide basic power requirements for low-power users, and dynamically distributes the surplus power to high-power charging devices when the power output is surplus. In particular, the indexing of power units adopts a tree indexing method, which greatly improves the search speed of power modules on the basis of meeting dynamic distribution.

[0058] In addition, the power distribution method based on tree search not only improves the query and adjustment efficiency of power distribution, but also supports the flexible expansion and dynamic adjustment of the charging pile power distribution system, ensures the compatibility and stability of the charging pile under different usage scenarios, improves the usage efficiency of the charging pile, and at the same time enhances the reliability and operation efficiency of the overall charging pile power distribution system, optimizes the utilization of power resources, and enhances the maintainability and scalability of the system.

[0059] The embodiments of the present application provide a charging pile power distribution system, which includes: a charging pile and a control device. Among them, the charging pile includes a plurality of power units, the plurality of power units are connected in parallel through contactors, and each power unit is respectively connected with an output gun muzzle, and the control device is used to execute the charging pile power distribution method.

[0060] Optionally, the charging pile power distribution system of the present application is a split pile system supporting a multi-gun multi-dimensional closed path, referring to Figure 1 the topological diagram designed for the split pile system shown, Figure 1M1 to M12 shown in the figure represent 12 power units, 1# to 12# respectively represent the output muzzles, KM1 to KM18 represent 18 groups of contactors, and through the 18 groups of contactors, multiple parallel connection schemes can be realized for the 12 power units to meet the charging requirements of all charging devices connected to the charging pile at a relatively low cost. Among them, the charging device is, for example, a vehicle. The charging unit is a basic component of the charging pile, and each charging unit corresponds to an output muzzle for providing charging services for the charging vehicle. The contactor is a key component for realizing the parallel connection scheme. By controlling the closing and opening of these contactors, the charging pile power distribution system can flexibly combine different charging units to form multiple parallel paths to adapt to the charging requirements of different vehicles. That is to say, the charging pile power distribution system of the present application can realize multiple parallel connection schemes by using contactors, and all of them can be dynamically adjusted according to the actual charging requirements to ensure the effective utilization of resources and the maximization of charging efficiency.

[0061] Optionally, Figure 2 The figure shows a structural diagram of a split pile system design for a multi-gun multi-dimensional closed path provided by an embodiment of the present application, corresponding to Figure 1 the topological diagram of the split pile system design shown. In the present application, adopting Figure 2 the structure shown can support efficient query and update operations, can quickly locate and adjust the power requirements of the charging pile, and avoid performance bottlenecks. Moreover, the split pile system design has a hierarchical management feature. Based on this feature, the charging pile power distribution system can dynamically optimize power distribution according to the priority and requirements of the charging pile, improve the flexibility and adaptability of power distribution, and thus can easily cope with the increase in the number of charging piles and support large-scale deployment, ensuring that the charging pile power distribution system operates efficiently and stably under the growing automotive charging requirements.

[0062] Based on this, the split pile system design for a multi-gun multi-dimensional closed path provided by the present application realizes the rapid location and adjustment of the power requirements of the charging pile through flexible contactor configuration, hierarchical management features, and efficient query and update mechanisms, improves the flexibility and adaptability of the charging pile power distribution system, and meets the growing vehicle charging requirements.

[0063] Next, in combination with the above Figure 1 and Figure 2 described content in the charging pile power distribution system shown, the charging pile power distribution method provided by the embodiments of the present application will be described in detail.

[0064] Figure 3 The figure shows a schematic flowchart of a charging pile power distribution method provided by an embodiment of the present application. Referring to Figure 3 shown, the execution subject of this method is the control device in the above charging pile power distribution system, and this method specifically includes the following steps:

[0065] S301. Obtain the charging demand power of the charging device currently connected to the charging pile, and obtain the power supply information of each power unit in the current charging pile.

[0066] Optionally, each power unit corresponds to at least one sub-node, and each sub-node is a power unit directly connected to the power unit. The power supply information includes the maximum power supply and the current input status. Among them, the maximum power supply refers to the maximum power value that each power unit can provide in its optimal working state. The current input status includes: idle state, input state, and application input state. The current input status is used to indicate whether the power unit is currently providing power to a certain charging device and the specific power output level.

[0067] Optionally, the control device can continuously monitor the status of each charging device and record the charging demand power of each charging device. When a new charging device is connected to the charging pile, the control device can automatically read the charging parameters of the connected charging device, such as battery capacity, remaining power, maximum charging current, etc., and determine the charging demand power required by the charging device based on the read charging parameters. It should be noted that as the charging process progresses, the charging demand power of the charging device will change accordingly.

[0068] Optionally, in this application, each power unit corresponds to at least one sub-node, and these sub-nodes are other power units directly connected to it. This hierarchical tree structure helps to manage and allocate power resources more precisely, ensuring that each power unit can flexibly adjust its output according to the actual situation.

[0069] S302. Determine at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each sub-node of the direct-connected power unit.

[0070] Optionally, the charging demand power is the specific charging demand power of each charging device currently connected to the charging pile. The power supply information of the direct-connected power unit includes the maximum power supply and the current input status. The maximum power supply refers to the maximum power value that the direct-connected power unit can provide. The current input status refers to whether the direct-connected power unit is currently providing power to other charging devices and its output power level. The power supply information of each sub-node of the direct-connected power unit includes the maximum power supply of each sub-node, that is, the maximum power supply capacity of each sub-node, and the current input status of each sub-node, that is, the current working state of each sub-node.

[0071] Optionally, during the process of determining at least one target power unit corresponding to the charging device, first check whether the directly connected power unit can meet the charging demand power of the charging device. If so, directly select the directly connected power unit as the target power unit. Conversely, if the directly connected power unit cannot fully meet the demand, further evaluate the power supply capabilities of all child nodes of the directly connected power unit to determine whether the child nodes of the directly connected power unit can supplement the insufficient part. On this basis, use a tree structure to represent the relationship between the power unit and its child nodes, and start searching layer by layer downward from the directly connected power unit until sufficient power resources are found to meet the charging demand, then at least one target power unit can be determined.

[0072] S303. Perform power allocation for each target power unit according to the power supply information and charging demand power of each target power unit.

[0073] Optionally, in this application, the indexing of the target power unit adopts a tree indexing method, which greatly improves the search speed of the power module on the basis of meeting dynamic allocation. However, when performing power allocation, it is necessary to prevent the problem of excessive current on the contactor caused by overloading on one side. Therefore, the allocation of the leaf nodes in the tree structure must be as reasonable as possible, and the output current of each power unit put into use can be adjusted in combination with the allocation algorithm.

[0074] Optionally, if a target power unit can independently meet the charging demand of the charging device, allocate all the demand power of the charging device to this target power unit, and update the current input state of this target power unit to reflect the new power output level of this target power unit.

[0075] Optionally, if there are multiple target power units, that is, one target power unit cannot meet the charging demand of the charging device, perform reasonable power allocation for each target power unit according to the power supply capabilities and priorities of each target power unit to achieve load balancing, and update the current input states of each target power unit after completing the power allocation. Specifically, based on the charging demand power and the maximum power supply of each target power unit, perform preliminary power allocation, which can be allocated proportionally or adjusted according to the current load situation of each target power unit. On the basis of the preliminary allocation, adjust and optimize the power allocation according to the real-time monitored state of the target power unit. In addition, it is also possible to further confirm whether the final power allocation result meets the charging demand, and each target power unit is within a safe and efficient operating range.

[0076] Based on this, according to the charging stack power distribution method provided by the embodiments of the present application, each power unit serves as a node of the tree, and its child nodes are the power units directly connected to it. By introducing a tree structure to represent the relationship between each power unit and its child nodes in the charging stack, when power needs to be allocated to a charging device, the power units can be efficiently searched and allocated based on the tree structure. Specifically, at least one target power unit is determined according to the charging demand power, the power supply information of the directly connected power unit and its child nodes, further ensuring the rationality and efficiency of power distribution. And after determining the target power units, the power is evenly distributed according to the power supply information and charging demand power of each target power unit, thereby avoiding the problem of uneven power distribution and ensuring the effective utilization of resources. Therefore, the present application provides a charging stack power distribution method based on tree search, realizing the precise matching of charging demand and power supply capacity, and effectively solving the problems existing in the existing power distribution methods through an intelligent target power unit selection and dynamic adjustment mechanism. While improving the power distribution efficiency and user experience of the charging stack, it also promotes the rational utilization of resources.

[0077] As a possible implementation, each power unit in the present application has corresponding child nodes. For each power unit in the charging stack, the child nodes of each power unit and the priorities of each child node can be determined according to the connection information of each power unit in the charging stack.

[0078] Optionally, the connection information means that in the charging stack, multiple power units are connected in parallel through contactors, and each power unit corresponds to at least one child node, and each child node is a power unit directly connected to the power unit. Based on the definition of the child node, referring to Figure 1 and Figure 2 the connection relationships of each power unit shown in, taking the 12 power units M1 to M12 as an example, the child nodes of each power unit are as shown in Table 1 below:

[0079] Table 1

[0080] Power unit number Child node M1 M2, M12, M7 M2 M3, M1, M8 M3 M4, M2, M9 M4 M5, M3, M10 M5 M6, M4, M11 M6 M7, M5, M12 M7 M8, M6, M1 M8 M9, M7, M2 M9 M10, M8, M3 M10 M11, M9, M4 M11 M12, M10, M5 M12 M1, M11, M6

[0081] Exemplarily, referring to Figure 1 and Figure 2 shown, first clarify the connection relationships between each power unit M1 to M12. Specifically, the power units directly connected to power unit M1 include power unit M2, power unit M7, and power unit M12. Among them, the on-off of the connection between power unit M2 and power unit M1 is controlled by contactor KM1, the on-off of the connection between power unit M7 and power unit M1 is controlled by contactor KM13, and the on-off of the connection between power unit M12 and power unit M1 is controlled by contactor KM12.

[0082] Specifically, the power units directly connected to power unit M2 include power unit M1, power unit M3, and power unit M8. Among them, the connection and disconnection between power unit M2 and power unit M1 are controlled by contactor KM1, the connection and disconnection between power unit M2 and power unit M3 are controlled by contactor KM2, and the connection and disconnection between power unit M2 and power unit M8 are controlled by contactor KM14.

[0083] Specifically, the power units directly connected to power unit M3 include power unit M2, power unit M4, and power unit M9. Among them, the connection and disconnection between power unit M3 and power unit M2 are controlled by contactor KM2, the connection and disconnection between power unit M3 and power unit M4 are controlled by contactor KM3, and the connection and disconnection between power unit M3 and power unit M9 are controlled by contactor KM15.

[0084] Specifically, the power units directly connected to power unit M4 include power unit M5, power unit M3, and power unit M10. Among them, the connection and disconnection between power unit M4 and power unit M3 are controlled by contactor KM3, the connection and disconnection between power unit M4 and power unit M5 are controlled by contactor KM4, and the connection and disconnection between power unit M4 and power unit M10 are controlled by contactor KM16.

[0085] Specifically, the power units directly connected to power unit M5 include power unit M6, power unit M4, and power unit M11. Among them, the connection and disconnection between power unit M5 and power unit M4 are controlled by contactor KM4, the connection and disconnection between power unit M5 and power unit M6 are controlled by contactor KM5, and the connection and disconnection between power unit M5 and power unit M11 are controlled by contactor KM17.

[0086] Specifically, the power units directly connected to power unit M6 include power unit M5, power unit M7, and power unit M12. Among them, the connection and disconnection between power unit M6 and power unit M5 are controlled by contactor KM5, the connection and disconnection between power unit M6 and power unit M7 are controlled by contactor KM6, and the connection and disconnection between power unit M6 and power unit M12 are controlled by contactor KM18.

[0087] Specifically, the power units directly connected to power unit M7 include power unit M8, power unit M6, and power unit M1. Among them, the connection and disconnection between power unit M7 and power unit M6 are controlled by contactor KM6, the connection and disconnection between power unit M7 and power unit M8 are controlled by contactor KM7, and the connection and disconnection between power unit M7 and power unit M1 are controlled by contactor KM13.

[0088] Specifically, the power units directly connected to power unit M8 include power unit M2, power unit M7, and power unit M9. Among them, the on / off of the connection between power unit M8 and power unit M2 is controlled by contactor KM14, the on / off of the connection between power unit M8 and power unit M7 is controlled by contactor KM7, and the on / off of the connection between power unit M8 and power unit M9 is controlled by contactor KM8.

[0089] Specifically, the power units directly connected to power unit M9 include power unit M10, power unit M8, and power unit M3. Among them, the on / off of the connection between power unit M9 and power unit M3 is controlled by contactor KM15, the on / off of the connection between power unit M9 and power unit M8 is controlled by contactor KM8, and the on / off of the connection between power unit M9 and power unit M10 is controlled by contactor KM9.

[0090] Specifically, the power units directly connected to power unit M10 include power unit M11, power unit M9, and power unit M4. Among them, the on / off of the connection between power unit M10 and power unit M4 is controlled by contactor KM16, the on / off of the connection between power unit M10 and power unit M9 is controlled by contactor KM9, and the on / off of the connection between power unit M10 and power unit M11 is controlled by contactor KM10.

[0091] Specifically, the power units directly connected to power unit M11 include power unit M12, power unit M10, and power unit M5. Among them, the on / off of the connection between power unit M11 and power unit M5 is controlled by contactor KM17, the on / off of the connection between power unit M11 and power unit M10 is controlled by contactor KM10, and the on / off of the connection between power unit M11 and power unit M12 is controlled by contactor KM11.

[0092] Specifically, the power units directly connected to power unit M12 include power unit M1, power unit M11, and power unit M6. Among them, the on / off of the connection between power unit M12 and power unit M1 is controlled by contactor KM12, the on / off of the connection between power unit M12 and power unit M6 is controlled by contactor KM18, and the on / off of the connection between power unit M12 and power unit M11 is controlled by contactor KM11.

[0093] Optionally, the priorities of the child nodes of each power unit can be set from the perspectives of load balancing or demand matching degree, etc. Load balancing means that when the sum of the output capabilities of the power units already put into operation on one side is greater than the bearing capacity of the contactor, other child nodes will be selected as high-priority child nodes. Demand matching degree means setting the priority according to the matching degree between the maximum power supply of the child node and the parent node. For example, if the maximum power supply of a certain child node is close to the demand of the parent node, the priority of this child node is higher.

[0094] Based on this, according to the connection relationship between the power units provided in the present application, the child nodes of each power unit are accurately determined, and their priorities are reasonably set, so as to achieve efficient resource management and optimized power distribution.

[0095] Figure 4 FIG. shows a schematic flowchart of a method for determining a target power unit provided by an embodiment of the present application. Refer to Figure 4 As shown, the above step S302 determines at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each child node of the direct-connected power unit, and specifically includes the following steps:

[0096] S401. If the charging demand power is greater than the maximum power supply of the direct-connected power unit, determine the current input status of each child node of the direct-connected power unit.

[0097] Exemplarily, the current input status includes: idle status, input status, and application input status. Among them, the idle status means that the child node is not currently providing power to other devices and can be immediately put into use; the input status means that the child node is currently supplying power to other devices and its remaining power supply capacity needs to be evaluated; the application input status means that other devices request to use the child node, but the allocation has not been successful yet, and it needs to wait or be re-evaluated.

[0098] Exemplarily, compare the charging demand power of the charging device with the maximum power supply of the direct-connected power unit to which the charging device is connected. If the charging demand power is greater than the maximum power supply of the direct-connected power unit, that is, it is determined that the power supply capacity of only relying on the direct-connected power unit can meet the charging demand of the charging device, so directly select the direct-connected power unit as the target power unit without further determining the input status of the child nodes of the direct-connected power unit. On the contrary, if the charging demand power is greater than the maximum power supply of the direct-connected power unit, that is, it is determined that only relying on the power supply capacity of the direct-connected power unit cannot meet the charging demand of the charging device, and it is also necessary to further check the input status of each child node of the direct-connected power unit.

[0099] S402. Determine at least one target power unit according to the current input status, priority, and remaining demand power of each child node of the direct-connected power unit.

[0100] Optionally, the remaining demand power is the difference between the charging demand power and the maximum power supply of the directly connected power unit. According to the pre-set priority rules, some child nodes of the directly connected power unit that are in an idle state, have a low load, have a large remaining power supply capacity, and have a high priority can be selected as candidate child nodes. For each candidate child node, the maximum remaining power that each candidate child node can provide can be calculated, and the maximum remaining power corresponding to each candidate child node can be accumulated to obtain a total remaining power. If the total remaining power is greater than or equal to the remaining demand power, the above candidate child nodes can be used as a target power unit respectively. If the total remaining power is less than the remaining demand power, it is determined that the power supply capabilities of the child nodes of the directly connected power unit do not meet the power supply requirements, and available child nodes need to be searched from the child nodes of each child node as the target power unit.

[0101] Figure 5 FIG. shows a schematic flow chart of another method for determining a target power unit provided by an embodiment of the present application. As a possible implementation, referring to Figure 5 shown, the above step S402 determines at least one target power unit according to the current input status and priority of each child node of the directly connected power unit, and the remaining demand power, and specifically includes the following steps:

[0102] S501. Determine the current child node according to the current input status and priority of each child node of the directly connected power unit.

[0103] Optionally, if there are child nodes among all the child nodes of the directly connected power unit that have not joined the child node set, then the child node with the highest priority and the current input status being idle among the child nodes that have not joined the child node set is used as the current child node.

[0104] Exemplarily, when there are still optional child nodes among the child nodes of the directly connected power unit, that is, there are child nodes among all the child nodes of the directly connected power unit that have not joined the child node set and the current input status is idle, then the one with the highest priority is selected as the current child node.

[0105] Optionally, if all the child nodes of the directly connected power unit have joined the child node set, or the current input status of the child nodes that have not joined the child node set is not idle, then according to the priorities of the child nodes of the directly connected power unit, a target child node is determined, and a child node of the target child node is selected as the current child node.

[0106] Exemplarily, when there are still optional child nodes among the child nodes of the direct-connected power unit, that is, all the child nodes of the direct-connected power unit have been added to the child node set, or the current input states of the child nodes that have not been added to the child node set are not in the idle state, it is necessary to re-determine the target child nodes according to the priorities of the child nodes of the direct-connected power unit, and select one child node from the target child nodes as the current child node.

[0107] Exemplarily, referring to Figures 6 to 8 as shown, in Figure 6 , after the power unit M1 is input and it is calculated that the current power does not meet the demand, the child nodes of the power unit M1 are started to be checked: the power unit M2, the power unit M12, and the power unit M7. Among them, if condition 1 indicates that the power unit M2 has been occupied, then the power unit M12 will be searched continuously. If condition 2 indicates that the power unit M12 is not occupied, then the power unit M12 will be input. If condition 3 indicates that the power still does not meet the requirement and the power unit M7 is in the idle state after the power unit M12 is input, then the power unit M7 will be input, thereby generating Figure 7 . At this time, if the power demand still cannot be met, then the child nodes of the power unit M12 and the power unit M7 will be searched continuously: the power unit M11, the power unit M6, and the power unit M8. Among them, if condition 1 indicates that the power unit M11 is in the idle state, then the power unit M11 will be input. If condition 2 indicates that the power still does not meet the requirement and the power unit M6 is in the idle state, then the power unit M6 will be input. If condition 3 indicates that the power has been met, then the power unit M8 will not be input continuously, thereby generating Figure 8 .

[0108] S502. Add the current child node to the child node set.

[0109] Exemplarily, add the current child node to the child node set, and update the state of the current child node added to the child node set to "added".

[0110] S503. If the sum of the maximum power supply powers of all the child nodes in the child node set is greater than the remaining demand power, then all the child nodes in the child node set are used as target power units, and the loop ends.

[0111] Exemplarily, if there are 5 child nodes in the child node set, calculate the sum of the maximum power supply powers of these 5 child nodes in the child node set. For example, the sum of the maximum power supply powers is 30KW, and the remaining demand power is 20KW. Then it is determined that the sum of the maximum power supply powers is greater than the remaining demand power. Furthermore, the 5 child nodes included in the child node set can be used as target power units, and the loop ends.

[0112] S504. Otherwise, re - execute steps S501 - S504.

[0113] Exemplarily, if the sum of the maximum power supply of all child nodes in the child node set is less than the remaining demand power, re - execute steps S501 - S504 until a sufficient combination of child nodes is found to meet the charging demand of the charging device.

[0114] Based on this, according to the current input status and priority of each child node of the direct - connection power unit, the target power unit is intelligently determined to ensure that each charging device can obtain the optimal power supply while maximizing the utilization of existing resources.

[0115] Figure 9 The flowchart of an input - exit method provided by an embodiment of the present application is shown. As a possible implementation, referring to Figure 9 as shown, after obtaining the charging demand power of the charging device currently connected to the charging stack, the method further includes:

[0116] S901. Determine whether the charging demand power overflows, and determine whether the current input status of the direct - connection power unit is the target status, where the target status is the input status or the applied - input status.

[0117] Optionally, if the demand power of the charging device overflows, or the direct - connection power unit accessed by the charging device is applied for input or has been input by other charging devices, it is necessary to control the direct - connection power unit to exit the input to meet the most basic charging demand of each charging device.

[0118] Optionally, determining whether the charging demand power overflows in the above step includes: based on the available power supply of each power unit in the current charging stack, determining the target remaining power of the charging stack; if the target remaining power is greater than the charging demand power, it is determined that the charging demand power overflows. Among them, the target remaining power is the sum of the available power supplies of the remaining power units in the charging stack after reducing one power unit.

[0119] Exemplarily, obtain the maximum power supply and the current input status of each power unit in the current charging stack, calculate the available power supply of each power unit, that is, the maximum power supply minus the input power, and then accumulate the available power supplies of each power unit to obtain the total available power supply. On this basis, select a power unit to be removed, recalculate the sum of the available power supplies of the remaining power units, and use the sum of the available power supplies of the remaining power units as the target remaining power. If the target remaining power is greater than the charging demand power, it is determined that the charging demand power overflows.

[0120] S902. If the charging demand power overflows, or the current input state of the directly connected power unit is the target state, determine a third power unit to be withdrawn from at least one of the power units already in operation in the charging stack, and control the third power unit to withdraw from operation.

[0121] Optionally, if the charging demand power overflows, or the current input state of the directly connected power unit is the target state, obtain the status information of all the power units already in operation in the charging stack, especially their current input power and priorities, select one or more power units from the power units already in operation as the third power units to be withdrawn from operation, and send a withdrawal instruction to the selected third power units to ensure their safe withdrawal from the input state and update the relevant status records.

[0122] Optionally, if the current input state of the directly connected power unit is the target state, regard the directly connected power unit as a power unit already in operation, and withdraw from operation starting from the end node according to the priorities of the respective child nodes of the power units already in operation. If, after the end node withdraws from operation, the current available power supply of the charging stack is greater than the charging demand power, regard the end node as the third power unit and control the currently pending power unit to withdraw from operation. If, after the end node withdraws from operation, the current available power supply of the charging stack is less than the charging demand power, do not perform the withdrawal operation.

[0123] Exemplarily, in the case of regarding the directly connected power unit as a power unit already in operation, withdraw from operation starting from the end node (i.e., the child node with the lowest priority) according to the priorities of the respective child nodes of the power units already in operation. After the end node withdraws from operation, immediately check the current available power supply of the charging stack and compare the current available power supply with the charging demand power. If, after the end node withdraws from operation, the current available power supply of the charging stack is greater than the charging demand power, regard the end node as the third power unit.

[0124] Optionally, if, after the end node withdraws from operation, the current available power supply of the charging stack is less than the charging demand power, determine the child node to withdraw from operation among the upper-level child nodes of the end node. That is to say, when all the end nodes are destroyed, continue to check whether the upper-level child nodes can be withdrawn.

[0125] Exemplarily, when it is detected that the end node (i.e., the bottom-level child node) withdraws from operation, if the current available power supply of the charging stack is not sufficient to meet the charging demand power, it is necessary to further adjust the power distribution. At this time, one or more power units among the upper-level child nodes of the end node will be selected as the new candidate power units to be withdrawn to ensure that the total power supply capacity of the charging stack can still meet the demand.

[0126] Exemplarily, when the charging demand power overflows or other charging devices occupy the invested power units as direct-connected power units, it is necessary to withdraw the invested units. As shown in Table 2 (corresponding to Figure 8 the generated tree), where the power unit M1 is a direct-connected power unit, the power units M12 and M7 are the child nodes of the power unit M1, and the power units M11 and M6 are the child nodes of the power unit M12. When the charging demand power overflows and withdrawal is required, the three power units M6, M11, and M7 located at the end nodes will be preferentially withdrawn.

[0127] Table 2

[0128]

[0129] Specifically, the calculation is carried out in the order of first finding the child nodes of the direct-connected power unit and then finding the next-level child nodes. When it is calculated that the charging demand can still be met after withdrawing the power unit M7 when the power unit M7 is found, the power unit M7 will be withdrawn first. After withdrawing the power unit M7, it will continue to judge whether the charging demand can still be met after withdrawing the power unit M11. If it can, the power unit M11 will be withdrawn. If not, it will continue to calculate whether the charging demand can still be met after withdrawing the power unit M6. When all the end nodes are destroyed, it will continue to search for whether the upper-level nodes can be withdrawn. If the power unit M12 is occupied by other charging devices as a direct-connected power unit, the power units on the end nodes connected to the power unit M12, that is, the power units M6 and M11, will be withdrawn first, and finally the power unit M12 will be withdrawn. After all the power units are released, the power unit M1 will re-search for other available power units according to the tree search method.

[0130] Based on this, by flexibly adjusting the input states of the power units in the charging stack, the charging demands of the charging devices are met and the stable operation of the power distribution system of the charging stack is ensured. At the same time, through the setting of priorities and dynamic adjustment strategies, the efficiency and reliability of the power distribution system of the charging stack can be further improved.

[0131] Optionally, after controlling the third power unit to withdraw from the input, the method further includes: waiting for a preset time, and determining the actual available power of the current charging stack and the current demand power of the charging devices currently connected to the charging stack; determining the adjustment strategy of the power units in the charging stack according to the actual available power of the current charging stack and the current demand power of the charging devices currently connected to the charging stack.

[0132] Optionally, the adjustment strategy includes an increasing input operation or a decreasing input operation, and the priority of the decreasing input operation is greater than the priority of the increasing input operation.

[0133] Exemplarily, taking the 12 power units shown in Table 1 as an example, each power unit has a corresponding sub-node. When additional power units need to be added, the sub-nodes of the currently directly connected power unit will be searched preferentially. After finding the sub-nodes of the directly connected power unit, if the power still does not meet the charging requirements, the sub-nodes of the sub-nodes will be searched continuously. Refer to Figure 10 As shown, the power unit M1 can search for the power unit M2, the power unit M12, and the power unit M7, and can search for the power unit M3 and the power unit M8 through the power unit M2, search for the power unit M6 and the power unit M11 through the power unit M12, and search for the power unit M6 and the power unit M8 through the power unit M7, and so on. It can continuously search along the branches to achieve the purpose of maximizing the satisfaction of charging requirements and make full use of resources.

[0134] Exemplarily, refer to Figure 11 the additional power unit adding logic schematic diagram shown and Figure 12 the power unit reducing logic schematic diagram shown. If the charging requirements of the charging device can be met by using fewer power units, the redundant power units in the charging pile can be reduced. When the reduction is completed, the additional power unit adding step flag will be cleared. After waiting for a preset time, for example, after waiting for 15 seconds, the status of the actual available power and the actual required power will be calculated, and it will be judged whether additional power units need to be added or reduced according to the calculation result. If other charging devices occupy the added power unit as the directly connected power unit, there is no need to judge whether the interval between the two power distributions is greater than 15 seconds, and the power unit and all the other added sub-node power units will be released immediately, so that the subsequent charging devices can also perform the most basic charging quickly. All subsequent devices can still request additional power units through the tree-shaped search power distribution method to achieve the goal of efficient use of resources and flexible dynamic adjustment.

[0135] Based on this, the present application provides a charging pile power distribution method based on a tree structure. Using a tree structure can allocate charging resources more reasonably and quickly, and the tree structure has strong scalability. When adding or reducing power units and charging piles, the complexity of reconstructing the system during large-scale deployment can be avoided, enabling the system to better adapt to the growth of the future automotive charging market. All in all, the charging pile power distribution method based on tree-shaped search improves the efficiency, flexibility, and scalability of power distribution, and meets the requirements of large-scale and dynamic changes in the charging network.

[0136] The embodiment of the present application also provides a control device 1300, such as Figure 13As shown in the figure, it is a schematic structural diagram of a control device 1300 provided by an embodiment of the present application, including: a processor 1301, a memory 1302, and optionally, a bus 1303 may also be included. The memory 1302 stores machine-readable instructions executable by the processor 1301. When the control device 1300 runs, the processor 1301 communicates with the memory 1302 through the bus 1303. When the machine-readable instructions are executed by the processor 1301, the steps in the charging pile power distribution method described in any one of the above are executed.

[0137] An embodiment of the present application also provides a computer-readable storage medium. A computer program is stored on this computer-readable storage medium. When the computer program is run by a processor, the steps in the charging pile power distribution method described in any one of the above are executed.

[0138] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems and devices described above can refer to the corresponding processes in the method embodiments, which will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some communication interfaces. The indirect couplings or communication connections of the devices or modules can be in electrical, mechanical, or other forms.

[0139] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or this part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage media include: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0140] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application.

Claims

1. A method for power distribution of a charging stack, characterized in that Including: Obtaining the charging demand power of a charging device currently connected to a charging pile, and obtaining the power supply information of each power unit in the current charging pile, where each of the power units corresponds to at least one sub-node, and each of the sub-nodes is a power unit directly connected to the power unit, and the power supply information includes the maximum power supply and the current input status; Determining at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each sub-node of the direct-connected power unit; Performing power allocation on each of the target power units according to the power supply information of each of the target power units and the charging demand power.

2. The method according to claim 1, characterized in that, The determining at least one target power unit corresponding to the charging device according to the charging demand power, the power supply information of the direct-connected power unit to which the charging device is connected, and the power supply information of each sub-node of the direct-connected power unit includes: If the charging demand power is greater than the maximum power supply of the direct-connected power unit, determining the current input status of each sub-node of the direct-connected power unit, where the current input status includes: idle status, input status, and application input status; Determining at least one of the target power units according to the current input status and priority of each sub-node of the direct-connected power unit, and the remaining demand power, where the remaining demand power is the difference between the charging demand power and the maximum power supply of the direct-connected power unit.

3. The method according to claim 2, characterized in that The determining at least one of the target power units according to the current input status and priority of each sub-node of the direct-connected power unit, and the remaining demand power includes: A. Determining the current sub-node according to the current input status and priority of each sub-node of the direct-connected power unit; B. Adding the current sub-node to the sub-node set; C. If the sum of the maximum power supplies of all sub-nodes in the sub-node set is greater than the remaining demand power, taking all sub-nodes in the sub-node set as the target power units and ending the loop; D. Otherwise, re-executing steps A - D.

4. The method according to claim 3, wherein The determining the current sub-node according to the current input status and priority of each sub-node of the direct-connected power unit includes: If there is a sub-node among all sub-nodes of the direct-connected power unit that has not been added to the sub-node set, taking the sub-node with the highest priority and in the idle status among the sub-nodes that have not been added to the sub-node set as the current sub-node; If all sub-nodes of the direct-connected power unit have been added to the sub-node set, or the current input status of the sub-nodes that have not been added to the sub-node set is not in the idle status, determining the target sub-node according to the priority of each sub-node of the direct-connected power unit, and selecting a sub-node of the target sub-node as the current sub-node.

5. The method according to claim 1, wherein After obtaining the charging demand power of the charging device currently connected to the charging pile, it further includes: Determine whether the charging demand power overflows, and determine whether the current input state of the direct-connected power unit is the target state, where the target state is the input state or the applied input state; If the charging demand power overflows, or the current input state of the direct-connected power unit is the target state, then determine a third power unit to be withdrawn from at least one input power unit in the charging stack, and control the third power unit to withdraw.

6. The method according to claim 5, wherein The determining whether the charging demand power overflows includes: Based on the available power supply of each power unit in the charging stack currently, determine the target remaining power of the charging stack, where the target remaining power is the sum of the available power supplies of the remaining power units in the charging stack after reducing one power unit; If the target remaining power is greater than the charging demand power, then determine that the charging demand power overflows.

7. The method according to claim 5, characterized in that, The determining a third power unit to be withdrawn from at least one input power unit in the charging stack and controlling the third power unit to withdraw includes: If the current input state of the direct-connected power unit is the target state, then use the direct-connected power unit as the input power unit, and starting from the end sub-node, withdraw according to the priorities of the sub-nodes of the input power unit. If the current available power supply of the charging stack is greater than the charging demand power after the end sub-node withdraws, then use the end sub-node as the third power unit, and control the third power unit to withdraw.

8. The method according to claim 5, characterized in that, After controlling the third power unit to withdraw, it further includes: Wait for a preset time, and determine the actual available power of the charging stack currently and the current demand power of the charging devices currently connected to the charging stack; According to the actual available power of the charging stack currently and the current demand power of the charging devices currently connected to the charging stack, determine the adjustment strategy of the power units in the charging stack, where the adjustment strategy includes an increasing input operation or a decreasing input operation, and the priority of the decreasing input operation is greater than the priority of the increasing input operation.

9. The method according to claim 1, characterized in that It further includes: According to the connection information of each power unit in the charging stack, determine the sub-nodes of each power unit and the priorities of each sub-node.

10. A charging stack power distribution system, characterized in that The system includes: a charging stack and a control device. The charging stack includes a plurality of power units. The plurality of power units are connected in parallel through contactors, and each power unit is respectively connected with an output gun muzzle; The control device is used to execute the steps in the charging stack power distribution method according to any one of claims 1-9.

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