Charging pile based on multi-node charging topology network and charging control method

Abstract

The invention discloses a charging pile based on a multi-node charging topology network and a charging control method. The method comprises the following steps: receiving a charging request from a started charging gun; according to the charging request, a power distribution strategy is determined, and the power distribution strategy comprises the number of called nodes and the path of the called nodes; and controlling a series power distribution switch and a parallel power distribution switch on the determined called node path to be closed. Through the charging control method, the system can flexibly adjust the power distribution strategy according to the requirements of different charging requests, and the charging process is optimized. Through a shortest path distribution principle and a path saturation distribution principle, the system ensures high efficiency and stability of power distribution, loads are balanced among a plurality of nodes, overload of a single node is avoided, and thus the performance and reliability of the charging system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular, to a charging pile and a charging control method based on a multi-node charging topology network. Background Art

[0002] The development trend of new energy charging output power from slow charging in the past to fast charging, ultra-fast charging, and second charging is already very clear. Continuing to increase the power output upper limit is still the development trend of the charging pile industry. The technical bottleneck in continuously increasing the output upper limit of charging piles lies in the distribution strategy of the power unit of the charging pile. An excellent power routing topology can improve the utilization rate of the power distribution module and reduce the production cost of equipment.

[0003] The current charging topology network structures are a full matrix topology network, a ring topology network, and a derivative star-ring topology network and a derivative double-ring topology network. In the full matrix topology network, the power capacity of each node is the same, and the number of path links is the most complete, but the number of power switch devices occupied is very large, and the spatial volume cost is often huge; in the ring topology network, the power capacity of each node is the same, and the number of path links is only two-way, forward and reverse, but the number of power switch devices occupied is small, and it is mostly applicable to application scenarios with fewer nodes. In the case of multiple nodes, the flexibility disadvantage is obvious; in the derivative star-ring topology network, the power capacity of each node is the same, and the number of path links is different. The number of power switch devices occupied is moderate. According to different power capacity paths, there will be multiple power switch devices with different current-carrying capacities, and the product implementation complexity is relatively high; in the derivative multi-ring topology network, the power capacity of each node is different, and the number of path links is also different. The number of power switch devices occupied is moderate. According to different power capacity paths, there will be multiple power switch devices with different current-carrying capacities, and the product implementation complexity is relatively high. At the same time, there are also certain limitations in the control method, and it is necessary to continuously find the optimal path to improve the utilization rate of path links.

[0004] Based on this, a new solution is needed. Summary of the Invention

[0005] The main purpose of the present invention is to provide a charging pile and a charging control method based on a multi-node charging topology network for the problem that it is difficult for existing power routing topologies to achieve an optimal match in terms of node power capacity, number of path links, and number of occupied power switches. Intuitively, it is to exchange spatial volume or control complexity for the number of path links to improve the scheduling flexibility of the topology network.

[0006] To achieve the above object, the present invention provides a charging pile based on a multi-node charging topology network. The charging pile includes a plurality of charging guns, a plurality of power distribution modules, a plurality of series power distribution switches, a plurality of output contactor switch units, a plurality of parallel power distribution switches, and a control module. The multi-node charging topology network includes a plurality of basic topology networks connected in parallel. The plurality of basic topology networks are connected by a plurality of parallel power distribution switches. Each basic topology network includes 8 nodes, and each node is connected to one of the power distribution modules. The power distribution module is connected to one of the charging guns through the output contactor switch unit. The 8 nodes are connected in series by the series power distribution switches to form a ring structure. The i-th node is also connected to the (i + 2)-th node through the series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 6. The j-th node is also connected to the (j + 4)-th node through the series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 4. The m-th node is also connected to the (m + 6)-th node through the series power distribution switch, where m is 1 or 2. The control module controls the closing and opening of the plurality of series power distribution switches, the plurality of parallel power distribution switches, and the plurality of output contactor switch units according to the required power of each charging gun and the power distribution strategy.

[0007] In the charging pile based on the multi-node charging topology network provided by the present invention, the output powers of the plurality of power distribution modules are the same.

[0008] According to another aspect of the present invention, there is also provided a charging control method for the charging pile based on the multi-node charging topology network as described above, including the following steps:

[0009] Receiving a charging request from a started charging gun;

[0010] According to the charging request, determining a power distribution strategy, where the power distribution strategy includes the number of nodes to be called and the node paths to be called;

[0011] Controlling the series power distribution switches and the parallel power distribution switches on the determined called node paths to close.

[0012] In the charging control method provided by the present invention, the step of determining a power distribution strategy according to the charging request includes:

[0013] According to the required power of the charging request and the output power of the power distribution module, determining the number of nodes to be called;

[0014] According to the number of nodes to be called and the node where the power distribution module connected to the started charging gun is located, determining a plurality of charging nodes according to the principle of shortest path allocation;

[0015] Generate the called node path according to the multiple charging nodes according to the path saturation distribution principle.

[0016] In the charging control method provided by the present invention, the steps of determining multiple charging nodes according to the number of called nodes and the nodes where the power distribution modules connected to the activated charging guns are located according to the path shortest distribution principle include:

[0017] Construct a charging tree with the node where the power distribution module connected to the activated charging gun is located as the root charging node. Among them, the multiple nodes directly connected to the charging root node are trunk nodes;

[0018] Compare the number X of power distribution modules in the idle state among the power distribution modules connected to the multiple trunk nodes with the number Y of called nodes;

[0019] When X is greater than or equal to Y, select Y nodes from the multiple trunk nodes as trunk charging nodes;

[0020] When X is less than Y, select the trunk node where the power distribution module in the idle state is located as the charging node and use the multiple nodes directly connected to the selected trunk node as leaf nodes;

[0021] Compare the number Z of power distribution modules in the idle state among the power distribution modules connected to the multiple leaf nodes with Y - X;

[0022] When Z is greater than or equal to Y - X, select Y - X nodes from the multiple leaf nodes as leaf charging nodes;

[0023] When Z is less than Y - X, select the leaf node where the power distribution module in the idle state is located as the leaf charging node.

[0024] In the charging control method provided by the present invention, the steps of generating the called node path according to the multiple charging nodes according to the path saturation distribution principle include:

[0025] When X is greater than or equal to Y, use the paths between the root charging node and the multiple trunk charging nodes and the paths with direct connection relationships among the multiple trunk charging nodes as the called node paths;

[0026] When X is less than Y, use the paths between the root charging node and the multiple trunk charging nodes, the paths between each trunk charging node and the leaf charging nodes directly connected to it, and the paths with direct connection relationships among the multiple leaf charging nodes as the called node paths.

[0027] The charging pile based on the multi-node charging topology network provided by the present invention has the following beneficial effects: Through this charging control method, the system can flexibly adjust the power distribution strategy according to the requirements of different charging requests and optimize the charging process. Through the shortest path distribution principle and the path saturation distribution principle, the system ensures the efficiency and stability of power distribution, balances the load among multiple nodes, avoids overloading of a single node, and thus improves the performance and reliability of the charging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings:

[0029] Figure 1 The figure shows the basic network topology of the charging pile based on the multi-node charging topology network provided by an embodiment of the present invention;

[0030] Figure 2 The figure shows the basic network topology of the charging pile based on the multi-node charging topology network provided by another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The typical embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] The present invention provides a charging pile based on a multi-node charging topology network. The charging pile includes a plurality of charging guns, a plurality of power distribution modules, a plurality of series power distribution switches, a plurality of output contactor switch units, a plurality of parallel power distribution switches, and a control module. The multi-node charging topology network includes a plurality of basic topology networks connected in parallel. The plurality of basic topology networks are connected through a plurality of parallel power distribution switches. The control module controls the closing and opening of the plurality of series power distribution switches, the plurality of parallel power distribution switches, and the plurality of output contactor switch units according to the required power of each charging gun and the power distribution strategy. The output powers of the plurality of power distribution modules are the same.

[0034] Figure 1 The following shows the basic network topology of a charging pile based on a multi-node charging topology network provided by an embodiment of the present invention. As Figure 1 shown, each basic topology network includes two ring topology networks in a peer-to-peer relationship, without distinguishing between inner and outer rings. There are 4 nodes on each ring (for example, nodes 1, 3, 5, and 7 form the first ring topology network, and nodes 2, 4, 6, and 8 form the second ring topology network). At the same time, diagonal and adjacent-angle star links are added to each node of the two ring topology networks, adding 3 link paths (for example, node 1 is connected to nodes 2, 5, and 8 at the same time). In this way, each node has 5 link paths. Looking from one of the nodes as an exit, this node is equivalent to having 6 "degrees of freedom" (plus the inherent link path of its own node). That is to say, the power flow can flow to this node from 6 completely different link paths. That is, each of the basic topology networks includes 8 nodes, each node is connected to a power distribution module, the power distribution module is connected to a charging gun through the output contactor switch unit, the 8 nodes are connected in series by series power distribution switches to form a ring structure, the i-th node is also connected to the (i + 2)-th node through a series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 6, the j-th node is also connected to the (j + 4)-th node through a series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 4, and the m-th node is also connected to the (m + 6)-th node through a series power distribution switch, where m is 1 or 2. Thus, the power flow of each node can flow to the node through 6 completely independent paths, providing stronger flexibility and redundancy, and avoiding system collapse caused by a single path failure.

[0035] Specifically, in an embodiment of the present invention, the multiple basic topology networks are connected through multiple parallel power distribution switches. Figure 2 The following shows the basic network topology of a charging pile based on a multi-node charging topology network provided by an embodiment of the present invention. In Figure 2In the illustrated example, it includes two basic topological networks. The corresponding nodes in these two basic topological networks are connected in one-to-one correspondence through parallel power distribution switches, thus forming a multi-node star-ring topological network with 16 nodes. At the same time, the "degree of freedom" of each node also increases to 7. Considering the current relatively large output power granularity of a single machine, it can fully meet the liquid-cooled high-power supercharging terminal and also take into account the standard air-cooled charging terminal. By analogy, when including 3 basic topological networks, the nodes in the first basic topological network are connected in one-to-one correspondence to the nodes in the second basic topological network through parallel power distribution switches, and the nodes in the second basic topological network are in turn connected in one-to-one correspondence to the nodes in the third basic topological network through parallel power distribution switches, thus forming a multi-node star-ring topological network with 24 nodes.

[0036] Compared with the currently common topological network structures, the charging pile based on the multi-node charging topological network provided by the present invention has fewer power switches occupied, saves space volume, and at the same time has a simple scheduling and control method, and each node has a large "degree of freedom", that is, a large number of link paths. At the same time, through simple parallel expansion, it can quickly be compatible with common charging modules with different output powers on the market (20kW, 30kW, 40kW,...), and flexibly match the liquid-cooled high-power supercharging terminal and the standard air-cooled charging terminal, and both the quantity and the combination form can be freely matched without fixed node restrictions.

[0037] The present invention also provides a charging control method for the charging pile based on the multi-node charging topological network as described above, including the following steps:

[0038] Step S1, receiving a charging request from a started charging gun;

[0039] Specifically, in an embodiment of the present invention, after a certain charging gun is started, its charging request is received, and the power required by the charging gun and the node position where the charging power module connected to the charging gun is located can be parsed through the charging request.

[0040] Step S2, determining a power distribution strategy according to the charging request, where the power distribution strategy includes the number of nodes to be called and the node path to be called;

[0041] Specifically, in an embodiment of the present invention, the number of nodes to be called can be calculated according to the required power of the charging gun; then, according to the required number of nodes, a charging tree is established with the node where the power module connected to the charging gun is located as the root. Among them, the nodes directly connected to the node where the power module connected to the charging gun is located are used as trunk nodes, and the nodes directly connected to the selected trunk nodes are leaf nodes, and so on (for example, for Figure 1 the shown node 1, its trunk nodes are nodes 2, 3, 5, 7, and 8. If node 2 is selected, the leaf node is node 6; forFigure 2 The shown Node 1-1 has dry nodes as Node 1-2, 1-3, 1-5, 1-7, 1-8 and 2-1. If Node 1-3 and 2-1 are selected, the leaf nodes are Node 1-4, 2-2, 2-3, 2-5, 2-7, 2-8;). Then, according to the shortest path allocation principle and the path saturation allocation principle, the corresponding nodes and connection paths are determined. Therefore, step S2 includes:

[0042] Step S21: Determine the number of nodes to be called according to the required power of the charging request and the output power of the power distribution module;

[0043] Specifically, in an embodiment of the present invention, the output powers of the power distribution modules are the same.

[0044] Step S22: According to the number of nodes to be called and the node where the power distribution module connected to the activated charging gun is located, determine multiple charging nodes according to the shortest path allocation principle;

[0045] Specifically, in an embodiment of the present invention, the shortest path allocation principle means that there will be a corresponding sorting for the node call order according to the number of path jumps. The one with fewer jumps is ranked higher. Taking Figure 1 the shown single 8-node star-ring topology as an example, assuming that the charging gun connected to Node 1 is activated, and it is calculated that 5 power modules are required at the position of Node 1. Then Node 1 will be preferentially selected as the root node, and then 4 dry nodes will be selected from the 5 nodes with the same priority of Node 2, 3, 5, 7 and 8. If only Node 1 and 3 are available, then the 2 leaf nodes of Node 7 and 8 with the same priority will be searched. Taking Figure 2 the shown 2 8-node star-ring topologies as an example, assuming that, for example, 5 modules are required at the position of Node 1-1. Then Node 1-1 will be preferentially selected as the root node, and then 4 dry nodes will be selected from the 6 nodes with the same priority of 1-2, 1-3, 1-5, 1-7, 1-8 and 2-1. If only 1-2 and 2-1 are available, then the 6 leaf nodes of 1-6, 2-2, 2-3, 2-5, 2-7 and 2-8 with the same priority will be searched. Therefore, step S22 includes:

[0046] Construct a charging tree with the node where the power distribution module connected to the activated charging gun is located as the root charging node, where the multiple nodes directly connected to the charging root node are dry nodes;

[0047] Compare the number X of power distribution modules in the idle state among the power distribution modules connected to multiple dry nodes with the number Y of nodes called. When X is greater than or equal to Y, select Y nodes from the multiple dry nodes as dry charging nodes. When X is less than Y, select the dry nodes where the power distribution modules in the idle state are located as charging nodes and use the multiple nodes directly connected to the selected dry nodes as leaf nodes;

[0048] Compare the number Z of power distribution modules in the idle state among the power distribution modules connected to multiple leaf nodes with Y - X. When Z is greater than or equal to Y - X, select Y - X nodes from the multiple leaf nodes as leaf charging nodes. When Z is less than Y - X, select the leaf nodes where the power distribution modules in the idle state are located as leaf charging nodes.

[0049] Step S23: Generate the called node paths according to the multiple charging nodes in accordance with the path saturation distribution principle;

[0050] Specifically, in an embodiment of the present invention, the path saturation distribution principle means that all closable paths will be added to the set during the distribution process. For example, taking Figure 1 a single 8 - node star - ring topology shown as an example, assuming that 4 power modules are required at the position of node 1, and nodes 1, 3, 7, and 8 are selected, then the paths between corresponding nodes 3 and 7 and between corresponding nodes 7 and 8 should all be conducted. Taking Figure 2 two 8 - node star - ring topologies shown as an example, assuming that, for example, 4 modules are required at the position of node 1 - 1, and nodes 1 - 1, 1 - 5, 2 - 1, and 2 - 5 are selected, then the paths between corresponding nodes 1 - 5 and 2 - 5 and between nodes 2 - 1 and 2 - 5 should all be conducted. Therefore, step S23 includes:

[0051] When X is greater than or equal to Y, use the paths between the root charging node and the multiple dry charging nodes and the paths with direct connection relationships among the multiple dry charging nodes as the called node paths;

[0052] When X is less than Y, use the paths between the root charging node and the multiple dry charging nodes, the paths between each dry charging node and its directly connected leaf charging nodes, and the paths with direct connection relationships among the multiple leaf charging nodes as the called node paths.

[0053] Step S3: Control the series power distribution switches and parallel power distribution switches on the determined called node paths to be closed.

[0054] Specifically, in an embodiment of the present invention, after the called node paths are determined, close the series power distribution switches and parallel power distribution switches between the corresponding nodes so that the charging requirements of the activated charging guns can be met.

[0055] Through this charging control method, the system can flexibly adjust the power distribution strategy according to the requirements of different charging requests and optimize the charging process. Through the shortest path distribution principle and the path saturation distribution principle, the system ensures the efficiency and stability of power distribution, balances the load among multiple nodes, avoids overloading of a single node, and thus improves the performance and reliability of the charging system.

[0056] An embodiment of the present invention further provides a battery test data transmission device, which may include:

[0057] A memory for storing a computer program;

[0058] A processor, when executing the computer program stored in the above-mentioned memory, can implement the following steps:

[0059] Receive a charging request from a started charging gun; determine a power distribution strategy according to the charging request, where the power distribution strategy includes the number of nodes to be called and the node paths to be called; control the series power distribution switch and the parallel power distribution switch on the determined node paths to be called to close.

[0060] An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the following steps can be implemented;

[0061] Receive a charging request from a started charging gun; determine a power distribution strategy according to the charging request, where the power distribution strategy includes the number of nodes to be called and the node paths to be called; control the series power distribution switch and the parallel power distribution switch on the determined node paths to be called to close.

[0062] The computer-readable storage medium may include various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes.

[0063] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0064] Similarly, it should be understood that, for the purpose of streamlining the present disclosure and facilitating the understanding of one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0065] Those skilled in the art can understand that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be adopted to combine all the features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) can be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

[0066] In addition, those skilled in the art can understand that, although some of the embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0067] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components according to the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (such as a computer program and a computer program product) for executing part or all of the methods described herein. Such a program for implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0068] It should be noted that the above embodiments are illustrative of the present invention and not restrictive thereof, and alternative embodiments can be designed by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices can be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

Claims

1. A charging pile based on a multi-node charging topology network, characterized in that, The charging pile includes a plurality of charging guns, a plurality of power distribution modules, a plurality of series power distribution switches, a plurality of output contactor switch units, a plurality of parallel power distribution switches, and a control module. The multi-node charging topology network includes a plurality of basic topology networks connected in parallel. The plurality of basic topology networks are connected by a plurality of parallel power distribution switches. Each of the basic topology networks includes 8 nodes, and each node is connected to one of the power distribution modules. The power distribution module is connected to one of the charging guns through the output contactor switch unit. The 8 nodes are connected in series into a ring structure through the series power distribution switches. The i-th node is also connected to the (i + 2)-th node through a series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 6. The j-th node is also connected to the (j + 4)-th node through a series power distribution switch, where i is a positive integer greater than or equal to 1 and less than or equal to 4. The m-th node is also connected to the (m + 6)-th node through a series power distribution switch, where m is 1 or 2. The control module controls the closing and opening of the plurality of series power distribution switches, the plurality of parallel power distribution switches, and the plurality of output contactor switch units according to the required power of each charging gun and the power distribution strategy.

2. The charging pile based on the multi-node charging topology network according to claim 1, wherein The output powers of the plurality of power distribution modules are the same.

3. A charging control method for a charging pile based on a multi-node charging topology network as described in claim 1 or 2, characterized in that, It includes the following steps: Receiving a charging request from a started charging gun; Determining a power distribution strategy according to the charging request, where the power distribution strategy includes the number of nodes called and the node paths called; Controlling the series power distribution switches and the parallel power distribution switches on the determined called node paths to close.

4. The charging control method according to claim 3, wherein The step of determining a power distribution strategy according to the charging request includes: Determining the number of nodes called according to the required power of the charging request and the output power of the power distribution module; Determining a plurality of charging nodes according to the number of nodes called and the node where the power distribution module connected to the started charging gun is located according to the principle of shortest path distribution; Generating the called node paths according to the plurality of charging nodes according to the principle of path saturation distribution.

5. The charging control method according to claim 4, wherein The step of determining a plurality of charging nodes according to the number of nodes called and the node where the power distribution module connected to the started charging gun is located according to the principle of shortest path distribution includes: Constructing a charging tree with the node where the power distribution module connected to the started charging gun is located as the root charging node, where the plurality of nodes directly connected to the charging root node are trunk nodes; Comparing the number X of power distribution modules in the idle state among the power distribution modules connected to the plurality of trunk nodes with the number Y of nodes called; When X is greater than or equal to Y, selecting Y nodes from the plurality of trunk nodes as trunk charging nodes; When X is less than Y, selecting the trunk node where the power distribution module in the idle state is located as a charging node and taking the plurality of nodes directly connected to the selected trunk node as leaf nodes; Comparing the number Z of power distribution modules in the idle state among the power distribution modules connected to the plurality of leaf nodes with Y - X; When Z is greater than or equal to Y - X, selecting Y - X nodes from the plurality of leaf nodes as leaf charging nodes; When Z is less than Y - X, select the leaf node where the power distribution module in the idle state is located as the leaf charging node.

6. The charging control method according to claim 5, wherein The steps of generating the called node path according to the multiple charging nodes according to the path saturation distribution principle include: When X is greater than or equal to Y, the paths between the root charging node and the multiple dry charging nodes and the paths with direct connection relationships among the multiple dry charging nodes are used as the called node paths; When X is less than Y, the paths between the root charging node and the multiple dry charging nodes, the paths between each dry charging node and the leaf charging node with a direct connection relationship therewith, and the paths with direct connection relationships among the multiple leaf charging nodes are used as the called node paths.

7. A charging control device, comprising a memory and a processor, characterized in that, A program of the charging control method is stored in the memory, and when the processor executes the program of the charging control method, the steps of the charging control method described in any one of claims 3 to 6 are implemented.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the charging control method described in any one of claims 3 to 6 are implemented.

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