Charging pile power distribution method and charging system

Abstract

The application provides a charging pile power distribution method and a charging system. The method comprises the following steps: constructing a global topology graph according to the connection relationship between each power supply module group in the charging system; determining the required number of power supply module groups according to the power demand of the current charging gun in the plurality of charging guns during the current charging; constructing a target topology graph of the current charging gun during the current charging according to the required number of power supply module groups and the global topology graph; adjusting the state of the switch corresponding to at least one switch node in the target topology graph, so that the switch corresponding to at least one switch node in the target topology graph is in a closed state, and supplying power to the current charging gun through the power supply module group corresponding to all power supply module groups in the target topology graph. The application can meet the dynamic power demand of the multi-gun charging pile, and balance the power utilization rate and the equipment safety under complex working conditions.

Description

Technical Field

[0001] This application relates to the field of charging technology, and more specifically, to a power distribution method for charging piles and a charging system. Background Technology

[0002] High-power charging piles can support multiple charging guns working concurrently. Generally, each charging gun has a corresponding charging module group. However, the power demand of a single gun changes dynamically. Therefore, it is necessary to dynamically adjust the available module group corresponding to the charging gun for different power charging guns. This also puts forward higher requirements for the precision and dynamism of power control.

[0003] Currently, the core issue with high-power charging piles is how to balance power utilization and equipment safety under complex operating conditions. Existing charging pile power switching methods suffer from problems such as high difficulty in coordination between multiple module groups, complex control of switch arrays, and difficulty in meeting the requirements for dynamic topology adjustment. Summary of the Invention

[0004] The purpose of this application is to provide a charging pile power allocation method and charging system to address the shortcomings of the prior art, thereby solving the problems of high difficulty in coordination between multiple module groups, complex control of switch arrays, and difficulty in meeting the requirements for dynamic topology adjustment in the power switching methods of charging piles in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, this application provides a power allocation method for charging piles, applied to a charging system corresponding to a target charging pile. The charging system includes: multiple charging guns and power supply module groups corresponding to each charging gun; each power supply module group establishes a connection with power supply module groups outside the current power supply module group through at least one switch; the method includes:

[0007] Based on the connection relationship between each power supply module group in the charging system, a global topology diagram is constructed. The global topology diagram includes: multiple charging gun nodes, multiple power supply module group nodes, and multiple switch nodes. Each charging gun node corresponds to one charging gun, each power supply module group node corresponds to one power supply module, and each switch node corresponds to one switch.

[0008] During the current charging, the required number of power supply module groups is determined based on the power demand of the current charging gun among the plurality of charging guns;

[0009] Construct the target topology map of the current charging gun during the current charging cycle based on the required number of the power supply module group and the global topology map;

[0010] According to the target topology diagram, adjust the state of the switch corresponding to at least one switch node in the target topology diagram so that the switch corresponding to at least one switch node in the target topology diagram is in a closed state, and supply power to the current charging gun through the power supply module group corresponding to all power supply module groups in the target topology diagram.

[0011] Optionally, constructing the target topology map of the current charging gun during the current charging cycle based on the required number of the power supply module group and the global topology map includes:

[0012] The target topology map of the current charging gun at the current charging time is constructed based on at least one of the required number of power supply module groups, the global topology map, and the historical topology map, wherein the historical topology map is the target topology map constructed by the current charging gun at the previous charging time.

[0013] Optionally, constructing the target topology map of the current charging gun during the current charging cycle based on at least one of the required number of the power supply module group, the global topology map, and the historical topology map includes:

[0014] Based on the required number of power supply module groups and the global topology map, construct the current topology map;

[0015] The current topology map is compared with the historical topology map to determine whether the historical topology map should be used as the target topology map;

[0016] If so, the historical topology map is used as the target topology map; otherwise, the historical topology map is adjusted according to the current topology map to obtain the target topology map.

[0017] Optionally, constructing the current topology map based on the required number of power supply module groups and the global topology map includes:

[0018] A. Take the node corresponding to the current charging gun in the global topology graph as the first node in the current topology graph;

[0019] B. Starting from the first node, sequentially search the global topology graph for at least one candidate power supply module group node that can be occupied on the first direction branch, the second direction branch, and the third direction branch connected to the first node.

[0020] C. Determine whether the total number of nodes in the candidate power supply module group is greater than or equal to the required number;

[0021] D. If so, then according to the connection relationship of each node in the global topology diagram, the first node and each of the candidate power supply module group nodes are combined to obtain the target topology diagram;

[0022] E. If not, then each of the candidate power supply module group nodes is taken as the new first node, and steps B-E are executed again until the total number of candidate power supply module group nodes is greater than or equal to the required number. According to the connection relationship of each node in the global topology diagram, the first node is combined with each of the candidate power supply module group nodes to obtain the target topology diagram.

[0023] Optionally, starting from the first node, the process of sequentially searching the global topology graph for at least one available candidate power supply module group node on the first directional branch connected to the first node includes:

[0024] Starting from the first node, search the global topology graph for the charging gun node connected to the first direction branch of the first node and the power supply module group node of the charging gun node;

[0025] Determine whether the maximum output current of the power supply module group node of the first direction branch is less than a preset current threshold.

[0026] If the maximum output current is less than the preset current threshold, then determine whether the charging gun node is a child node of the first node, and determine whether the power supply module group node of the charging gun node can be occupied according to the historical topology map.

[0027] If the charging gun node is not a child node of the first node, and the power supply module group node is an available node, then the power supply module group node is selected as the candidate power supply module group node available for the current charging gun.

[0028] Optionally, determining whether the power supply module group node of the charging gun node is available for use based on the historical topology map includes:

[0029] Determine whether the charging gun node is in a working state;

[0030] If the charging gun node is in working condition, then the power supply module group node is determined to be an unoccupiable node;

[0031] If the charging gun node is not in operation, and the power supply module group node is not included in the historical topology diagram, and the power supply module group node is not a child node of the first node, then the power supply module group node is determined to be an available node; otherwise, the power supply module group node is determined to be an unavailable node.

[0032] Optionally, adjusting the historical topology map based on the current topology map to obtain the target topology map includes:

[0033] Based on the comparison results between the historical topology map and the current topology map, at least one power supply module group node in the historical topology map is determined to be changed;

[0034] Based on the nodes of the power supply module group to be changed, the historical topology map is adjusted to obtain the target topology map of the current charging gun.

[0035] Optionally, if the power supply module group node to be changed is a power supply module group node to be deleted, the step of adjusting the historical topology map according to the power supply module group node to be changed to obtain the target topology map of the current charging gun includes:

[0036] Based on the module group identifier of the power supply module group to be changed, determine the power supply module group node to be deleted corresponding to the module group identifier in the historical topology diagram;

[0037] Delete the node of the power supply module group to be deleted and the corresponding switch node of the power supply module group to be deleted from the historical topology map.

[0038] Optionally, if the power supply module group node to be changed is a power supply module group node to be added, adjusting the historical topology map according to the power supply module group node to be changed to obtain the target topology map of the current charging gun includes:

[0039] Based on the module group identifier of the power supply module group to be changed, determine the node of the power supply module group to be added corresponding to the module group identifier in the historical topology diagram;

[0040] Add the node of the power supply module group to be added and the corresponding switch node of the power supply module group to be changed to the historical topology diagram.

[0041] Secondly, this application provides a charging system, which includes: a plurality of charging guns and a power supply module group corresponding to each charging gun; each power supply module group is connected to other power supply module groups outside the charging module group through at least one switch; when the charging system is running, the power distribution of the charging guns is realized by executing the charging pile power distribution method as described in the first aspect.

[0042] The beneficial effects of this application are as follows: The global topology diagram clearly shows the connection relationship between all power supply module groups and charging guns. By dynamically allocating power supply module groups based on the current power demand of the charging guns, resource limitations caused by fixed allocation can be avoided, and the power demand of the vehicle can be responded to in real time, realizing dynamic adjustment of the output power of the current charging gun based on power demand. For charging systems with multiple charging guns, the method of this application can solve the multi-gun compatibility problem in the traditional fixed allocation mode, improving the safety and stability of the charging system. Furthermore, precise control of the switching state ensures that the power supply path is completely matched with the target topology diagram, avoiding short circuits or overloads caused by accidental connection. The global topology diagram simplifies the expansion and maintenance of the charging system. In charging systems under complex operating conditions, the method of this application can effectively balance power utilization and equipment safety.

[0043] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This paper shows a schematic diagram of the architecture of a charging system provided in an embodiment of this application;

[0046] Figure 2 A flowchart of a power allocation method for a charging pile provided in an embodiment of this application is shown;

[0047] Figure 3 This document illustrates a flowchart of a method for generating a target topology map, as provided in an embodiment of this application.

[0048] Figure 4 This document illustrates a flowchart of yet another method for generating a target topology map, as provided in an embodiment of this application.

[0049] Figure 5 This document illustrates a flowchart of a method for determining a candidate power supply module group, as provided in an embodiment of this application.

[0050] Figure 6 This application provides a flowchart for determining whether a node is available for occupation.

[0051] Figure 7 This document illustrates a flowchart of yet another method for generating a target topology map, as provided in an embodiment of this application.

[0052] Figure 8 This document illustrates a flowchart of an embodiment of adding a node provided in this application.

[0053] Figure 9 This document illustrates a flowchart of a node deletion method provided in an embodiment of this application.

[0054] Figure 10 A schematic diagram of a charging system provided in an embodiment of this application is shown. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0056] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0057] High-power charging stations can support multiple charging guns operating simultaneously. Generally, each charging gun has a directly connected power supply module group, which supplies power to the charging gun when it is working. However, the power demand of the charging guns may change dynamically. For example, the battery status of the electric vehicle may cause dynamic changes in power demand, or the total power demand of multiple charging guns may exceed the rated total power of the charging station. In such cases, the power of individual charging guns needs to be dynamically adjusted.

[0058] However, in complex operating conditions where the power of a single charging gun needs to be dynamically adjusted, balancing power utilization and equipment safety becomes a pressing issue. Specifically, how to achieve coordination among multiple power supply module groups in a charging pile, how to control complex switch arrays, and how to dynamically adjust the circuit topology to meet real-time power demands are problems that need to be solved.

[0059] Based on this, this application proposes a power allocation method for charging piles, which is applied to the charging system corresponding to the target charging pile. The target charging pile can be a charging pile that requires power allocation. The charging system is used to dynamically adjust the power supply module group, switches, etc. of the target charging pile to meet the dynamically changing power requirements of the target charging pile.

[0060] Figure 1 This is a schematic diagram of the architecture of a charging system according to an embodiment of this application. (Refer to...) Figure 1 The charging system includes multiple charging guns G and power supply module groups M corresponding to each charging gun. The charging guns G are directly connected to the power supply module groups M. Each power supply module group can also be connected to other power supply module groups via a switch, for example... Figure 1 The power supply module group M0 can be connected to the power supply module group M1 via switch S1, or to the power supply module group M6 via switch S12.

[0061] It should be understood that Figure 1 This is merely one possible example of a charging system provided in this application. The number of charging guns, power supply module groups, and switches can be determined based on actual needs, and no specific values ​​are limited here.

[0062] It should be noted that, Figure 1 In the charging system, any two power supply module groups can be connected via a switch. A power supply module group can supply power to a directly connected charging gun. If charging gun A is not in operation, other charging guns can access the power supply module group corresponding to charging gun A. For example, when charging gun B needs to borrow the power supply module group corresponding to charging gun A, it can do so by controlling the opening or closing of the switch to connect to the power supply module group corresponding to charging gun A.

[0063] Figure 2 This is a flowchart illustrating a power allocation method for charging piles, as provided in an embodiment of this application. This method can be applied to... Figure 1 In the charging system shown, refer to Figure 2 The method includes:

[0064] S201. Based on the connection relationship between each power supply module group in the charging system, construct a global topology diagram. The global topology diagram includes: multiple charging gun nodes, multiple power supply module group nodes, and multiple switch nodes. Each charging gun node corresponds to a charging gun, each power supply module group node corresponds to a power supply module, and each switch node corresponds to a switch.

[0065] The power supply module group can be a power unit composed of multiple independent power supply modules, which is the power supply component of the charging pile.

[0066] A global topology diagram can be a holistic structural diagram reflecting the overall hardware connections in the entire charging system. It includes abstract symbols representing charging gun nodes, power supply module group nodes, and switch nodes. The lines connecting the nodes represent physical connections, for example... Figure 1 The power supply module group, switch and charging gun are connected by wires.

[0067] S202. During the current charging, determine the required number of power supply module groups based on the power demand of the current charging gun among multiple charging guns.

[0068] Optionally, the current charging gun can be a charging gun that is currently in use and requires power adjustment. When the current charging gun starts to be used, the power requirement of the current charging gun can be determined based on the power of the object to be charged connected to the current charging gun. For example, if the current charging gun is charging an electric vehicle and the vehicle's BMS (Battery Management System) requests a power of 500KW, then the power requirement can be determined to be 500KW.

[0069] In one possible implementation, the power of each power supply module group can be the same value. After determining the power requirement of the current charging gun, the power requirement of the current charging gun can be compared with the power of the power supply module group connected to the current charging gun. If the power of the power supply module group connected to the current charging gun is less than the power requirement, the ratio of the power requirement to the power supply module group can be calculated, and the ratio can be rounded up to obtain the required number of power supply module groups.

[0070] For example, assuming the power requirement is 500KW and the maximum output of each power supply module group is 300KW, then it can be determined that two modules are needed, that is, the required quantity is 2.

[0071] S203. Based on the required number of power supply module groups and the global topology map, construct the target topology map for the current charging gun during the current charging cycle.

[0072] Optionally, the target topology map can be a local topology map selected from the global topology map based on the current charging gun's charging needs, and used for this power supply. The target topology map includes the power supply module group, switch, and charging gun required for this charging.

[0073] In one possible implementation, based on the required number of power supply module groups, a sufficient number of power supply modules and corresponding switches that can power the current charging gun can be selected from the global topology graph to form a local subgraph, which is then used as the target topology graph. Specifically, the process can begin by searching from the node corresponding to the current charging gun in the global topology graph, finding currently unoccupied and idle power supply module groups, until the number of found power supply module groups equals or exceeds the required number. The found power supply module groups are then combined according to the connection relationships in the global topology graph to obtain the target topology graph.

[0074] In this embodiment of the application, by searching for the target topology in the global topology graph, irrelevant hardware can be excluded, thereby simplifying the control logic when the charging system supplies power.

[0075] S204. According to the target topology diagram, adjust the state of the switch corresponding to at least one switch node in the target topology diagram so that the switch corresponding to at least one switch node in the target topology diagram is in the closed state, and supply power to the current charging gun through the power supply module group corresponding to all power supply module groups in the target topology diagram.

[0076] Optionally, the target topology diagram describes the physical power supply circuit of the current charging gun during the current charging cycle. Therefore, the switching state of the switching nodes can be adjusted based on the target topology diagram so that all switches in the target topology diagram are in the closed state.

[0077] It should be understood that some of the switch nodes in the target topology diagram may already be in a closed state. For example, the last charging may have used some of the switches in the current target topology diagram. At this time, these switches are already in a closed state. Then, according to the target topology diagram, the remaining switches that are still in an open state can be identified, and the state of the switches in the open state can be adjusted so that all switches in the target topology diagram are in a closed state, forming a physical power supply circuit, allowing the selected power supply module group to supply power to the current charging gun.

[0078] It should be noted that if the power demand of the charging gun changes during the charging process, the charging system can obtain the latest power demand and re-execute steps S201-S204 according to the latest power demand to obtain a new target topology. The system can then add or remove power supply module groups according to the new target topology. For example, if the new target topology includes power supply module group A, which was not present in the original target topology, power supply module group A can be added, and the switch between power supply module group A and the current charging gun's power supply module group can be closed. If the new target topology reduces power supply module group B compared to the original target topology, the switch between power supply module group B and the current charging gun's module group can be opened, thereby forming the physical power supply circuit for the new target topology.

[0079] In this embodiment, the global topology diagram clearly shows the connection relationship between all power supply module groups and charging guns. By dynamically allocating power supply module groups based on the current power demand of the charging guns, resource limitations caused by fixed allocation can be avoided, and the power demand of the vehicle can be responded to in real time, realizing dynamic adjustment of the output power of the current charging gun based on power demand. For charging systems with multiple charging guns, the method of this application can solve the multi-gun compatibility problem in the traditional fixed allocation mode, improving the safety and stability of the charging system. Furthermore, precise control of the switching state ensures that the power supply path is completely matched with the target topology diagram, avoiding short circuits or overloads caused by accidental connection. The global topology diagram simplifies the expansion and maintenance of the charging system. In charging systems under complex operating conditions, the method of this application can effectively balance power utilization and equipment safety.

[0080] The following describes the steps for constructing the target topology map of the current charging gun during the current charging cycle based on the required quantity of the power supply module group and the global topology map. Step S203 includes:

[0081] Construct the target topology map for the current charging gun during the current charging cycle based on at least one of the following: the required number of power supply module groups, the global topology map, and the historical topology map.

[0082] The historical topology map is the target topology map constructed by the current charging gun during its previous charging. For example, assume the current charging gun is... Figure 1 If G1 is used, the target topology map built by the current charging gun G1 during the last charging can be obtained as the historical topology map.

[0083] In the first implementation, a target topology graph can be constructed based on the required number of power supply module groups and the global topology graph. For example, based on the required number of power supply module groups, the search starts from the charging gun node corresponding to the current charging gun in the global topology graph to obtain the power supply module group nodes required for the current charging. Then, according to the connection relationship in the global topology graph, the switch nodes between each power supply module group node and the current charging gun node, as well as the local subgraph composed of each power supply module group node and the current charging gun node, are used as the target topology graph for the current charging gun in the current charging.

[0084] In this implementation, when adjusting the switch states based on the target topology diagram, all switches in the global topology diagram can be turned off first, and then the switches contained in the target topology diagram can be turned off to form the physical power supply circuit indicated by the target topology diagram.

[0085] It should be noted that when multiple charging guns are simultaneously active, their target topology diagrams can be merged into a single target topology diagram. The switches are then closed according to the merged diagram to supply power to each charging gun. Note that the power supply module groups for each charging gun are different within the target topology diagrams of the multiple charging guns.

[0086] In the second implementation, a current topology map can be constructed first based on the required number of power supply module groups and the global topology map. Then, the historical topology map can be adjusted based on the current topology map to obtain the target topology map. For example, by comparing the current topology map with the historical topology map, the number of newly added power supply module groups and the number of reduced power supply module groups in the current topology map compared to the historical topology map can be obtained. The newly added power supply module groups can be added to the historical topology map, and the reduced power supply module groups can be deleted to obtain the target topology map.

[0087] It should be understood that, in order to balance the usage frequency of each power supply module group, a power supply module group that does not exist in the historical topology map can be selected as the power supply module group in the target topology map. In this way, each power supply module group can have a similar usage frequency, thereby avoiding overheating of the equipment caused by excessive usage frequency of a single power supply module group and ensuring equipment safety.

[0088] In this implementation, when adjusting switches based on the target topology, the state of switches contained in the historical topology can be left unchanged. Only the switch nodes that have changed in the target topology compared to the historical topology can be adjusted, including closing newly added switch nodes in the target topology and disconnecting reduced switch nodes in the target topology, thereby forming the physical power supply loop of the target topology.

[0089] The following is a further explanation of the second implementation method described above, please refer to... Figure 3 The process of constructing the target topology of the current charging gun during the current charging cycle based on at least one of the following: the required number of power supply module groups, the global topology map, and the historical topology map, includes:

[0090] S301. Construct the current topology diagram based on the required number of power supply module groups and the global topology diagram.

[0091] Optionally, the charging gun node corresponding to the current charging gun in the global topology graph can be used as the starting node, and a search can be conducted in the global topology graph based on a preset search strategy to find a group of power supply modules that can be occupied. When the number of occupied power supply module groups found is greater than or equal to the required number, all the occupied power supply module groups found, the switch nodes between the occupied power supply module groups and the current charging gun node, and the current charging gun node are combined according to the connection relationship in the global topology graph to obtain the current topology graph.

[0092] Among them, the power supply module group that can be occupied can be a power supply module group that is not in working state and can be connected to the current charging gun node through the switch node in the global topology diagram to supply power to the current charging gun.

[0093] S302. Compare the current topology graph with the historical topology graph to determine whether to use the historical topology graph as the target topology graph.

[0094] Optionally, the charging gun nodes, power supply module group nodes, and switch nodes included in the current topology map can be compared with those in the historical topology map. If the number of all nodes and the node identifiers are the same in the current topology map and the historical topology map, and the connection relationships between the nodes in the current topology map and the historical topology map are also the same, then it can be determined that the current topology map and the historical topology map are the same topology map. In this case, the historical topology map can be used as the target topology map.

[0095] S303. If yes, then use the historical topology map as the target topology map; otherwise, adjust the historical topology map according to the current topology map to obtain the target topology map.

[0096] If the nodes or connections in the historical topology graph and the current topology graph are different, the historical topology graph can be adjusted based on the current topology graph to obtain the target topology graph.

[0097] In one possible implementation, if the similarity between the current topology and the historical topology is greater than a preset threshold, the changed nodes of the current topology and the historical topology can be compared, and the historical topology can be adjusted according to the changed nodes to obtain the target topology.

[0098] In another possible implementation, if the similarity between the current topology graph and the historical topology graph is less than a preset threshold, the current topology graph can be directly used as the target topology graph.

[0099] In this embodiment of the application, by constructing the current topology graph and adjusting the historical topology graph based on the current topology graph, the number of switch nodes that need to be changed can be reduced. Only the state of switch nodes that are different between the current topology graph and the historical topology graph is adjusted, thereby reducing the complexity of switch control.

[0100] The following is a further explanation of how the current topology is constructed based on the required number of power supply module groups and the global topology diagram. Figure 4 As shown, the above step S301 includes:

[0101] S401. Take the node corresponding to the current charging gun in the global topology graph as the first node in the current topology graph.

[0102] S402. Starting from the first node, search the global topology graph in sequence for at least one candidate power supply module group node that can be occupied on the first direction branch, the second direction branch, and the third direction branch connected to the first node.

[0103] The first directional branch can be the left branch connected to the first node, the second directional branch can be the right branch connected to the first node, and the third directional branch can be the middle branch connected to the first node.

[0104] For example, suppose the current charging gun is Figure 1 If M0 is the first node, then M0 can be used as the first node. Starting from M0, the search can be performed sequentially in the order of the first direction, the second direction, and the third direction to obtain the available candidate power supply module group nodes.

[0105] S403. Determine whether the total number of nodes in the candidate power supply module group is greater than or equal to the required number.

[0106] S404. If so, then according to the connection relationship of each node in the global topology diagram, combine the first node with each candidate power supply module group node to obtain the target topology diagram.

[0107] After determining the nodes of the candidate power supply module group, the switch node between the current charging gun and the nodes of the candidate power supply module group can be determined in the global topology diagram. Then, according to the connection relationship of each node in the global topology diagram, the first node, each node of the candidate power supply module group and the switch node are connected to obtain the target topology diagram.

[0108] In the first implementation, if the power of the candidate power supply module groups is the same, the total number of nodes in the candidate power supply module groups can be compared with the required number. If the total number of nodes in the candidate power supply module groups is greater than or equal to the required number, the target topology can be obtained by combining the first node with the nodes of each candidate power supply module group according to the connection relationship of each node in the global topology diagram.

[0109] In the second implementation, if the power of the candidate power supply module groups are different, after determining a new candidate power supply module node, the total power of all current candidate power supply module nodes can be calculated. The total power is compared with the power requirement of the current charging gun. If the total power is greater than or equal to the power requirement, the currently determined candidate power supply module group and the first node can be combined according to the connection relationship of each node in the global topology diagram to obtain the target topology diagram.

[0110] S405. If not, then take each candidate power supply module group node as the new first node, and repeat steps S402-S405 until the total number of candidate power supply module group nodes is greater than or equal to the required number. According to the connection relationship of each node in the global topology diagram, combine the first node with each candidate power supply module group node to obtain the target topology diagram.

[0111] If the total number of currently determined candidate power supply module groups is less than the required number, or the total power of all currently determined candidate power supply module groups is less than the required power of the current charging gun, then the first determined candidate power supply module group can be taken as the new first node according to the order of the determined candidate power supply module groups, and the above steps S402-S405 can be re-executed until the total number of determined candidate power supply module groups is greater than or equal to the required number, or the total power of all currently determined candidate power supply module groups is greater than the required power of the current charging gun. Then, the current topology graph is generated based on all candidate power supply module group nodes and the first node.

[0112] The following explanation uses the first directional branch as an example to illustrate the process of sequentially searching for at least one candidate power supply module group node that can be occupied on the first directional branch connected to the first node in the global topology graph, starting from the first node. It should be understood that the process of determining the candidate power supply module group nodes for the second and third directional branches is the same as that for the first directional branch; the specific process will not be elaborated upon here. Figure 5 As shown, step S402 above includes:

[0113] S501. Starting from the first node, search the global topology graph for the charging gun node and the power supply module group node connected to the first direction branch of the first node.

[0114] S502. Determine whether the maximum output current of the power supply module group node of the first direction branch is less than the preset current threshold.

[0115] Reference Figure 1 Assuming the current charging gun is G1, we can take G1 as the first node, search for the charging gun node G0 on the left branch in the global topology graph, and find the power supply module group node M0 of the charging gun node G0.

[0116] After determining the power supply module group M0, it can be determined whether the maximum output current on the left branch exceeds the preset current threshold. The preset current threshold can be a pre-set relay current. If the maximum output current is greater than the preset current threshold, the power supply module group node of the first direction branch will not be selected as the candidate power supply module group node. If the maximum output current is less than the preset current threshold, the power supply module group node of the first direction branch can be selected as the candidate power supply module group node.

[0117] S503. If the maximum output current is less than the preset current threshold, determine whether the charging gun node is a child node of the first node, and determine whether the power supply module group node of the charging gun node can be occupied according to the historical topology diagram.

[0118] Optionally, if the charging gun node is a child node of the first node, it means that the charging gun of the first node can control or manage the charging gun of the charging gun node. In this case, in order not to interrupt the original control and management relationship between the parent and child nodes, the power supply module group node corresponding to the charging gun node can be excluded as a candidate power supply module group node.

[0119] The historical topology map can represent the power supply module group nodes used during the last charging of the current charging pile. In order to balance the usage frequency of each power supply module group node as much as possible, based on the historical topology map, power supply module group nodes with lower usage frequency can be selected as candidate power supply module group nodes. For example, power supply module group nodes that do not exist in the historical topology map can be selected as candidate power supply module group nodes.

[0120] S504. If the charging gun node is not a child node of the first node, and the power supply module group node is an available node, then the power supply module group node will be selected as the available power supply module group node for the current charging gun.

[0121] If there is no parent-child node between the charging gun node and the current charging gun node, and the power supply module group node of the charging gun node is an available node, then the power supply module group node can be used as a candidate power supply module group node.

[0122] The following is a further explanation of whether the power supply module group nodes of the charging gun nodes can be occupied, as determined based on the historical topology map. Figure 6 As shown, the above S503 step includes:

[0123] S601. Determine whether the charging gun node is in working condition.

[0124] S602. If the charging gun node is in working condition, then the power supply module group node is determined to be an unoccupiable node.

[0125] If the charging gun node is supplying power to the outside, then the power supply module group node of the charging gun node is working for the charging gun. At this time, it can be determined that the power supply module group node directly connected to the charging gun node is an unoccupiable node.

[0126] For example, assuming the charging gun node is G3 and G3 is in a working state, it can be determined that the power supply module group node M3 directly connected to the charging gun node G3 is an unoccupiable node.

[0127] S603. If the charging gun node is not in working state, and the power supply module group node is not included in the historical topology diagram, and the power supply module group node is not a child node of the first node, then the power supply module group node is determined to be an occupiable node; otherwise, the power supply module group node is determined to be an unoccupiable node.

[0128] If the historical topology graph does not include the power supply module group node, it means that the power supply module group node is not the power supply module group used last time, and the charging gun node directly connected to the power supply module group node is not in working state. In addition, the charging gun node directly connected to the power supply module group node has no control or management relationship with the first node. In this case, the first node can borrow the power supply module group node in the current charging process, that is, treat the power supply module group node as an available node.

[0129] It should be noted that if the charging gun node is not in operation, but the historical topology graph includes power supply module group nodes, the parent-child relationship between the charging gun node directly connected to the power supply module group node and the first node can be determined. When the charging gun node directly connected to the power supply module group node is a child node of the first node, and both the charging gun node and the first node are on the first direction branch, in order to save search costs, the power supply module group node that has a parent-child relationship with the first node can be used as a candidate power supply module group node.

[0130] In this embodiment, by determining the parent-child relationship between the power supply module group node and the first node, and by determining whether the power supply module group node can be occupied based on the historical topology map and the working status of the charging gun nodes directly connected to the power supply module group node, the usage frequency of each power supply module group can be balanced as much as possible, and the selected candidate power supply module group node will not affect the normal use of other charging guns, thereby ensuring the stability of the charging system and the safety of the charging pile equipment.

[0131] The following explains the process of adjusting the historical topology map based on the current topology map to obtain the target topology map. Figure 7 As shown, the above step S303 includes:

[0132] S701. Based on the comparison results between the historical topology map and the current topology map, determine at least one power supply module group node in the historical topology map that needs to be changed.

[0133] The power supply module groups to be changed can be those added or removed from the current topology compared to the historical topology.

[0134] S702. Based on the nodes of the power supply module group to be changed, adjust the historical topology map to obtain the target topology map of the current charging gun.

[0135] Optionally, the similarity between the historical topology map and the current topology map can be calculated. If the similarity is greater than a preset threshold, the historical topology map can be adjusted according to the power supply module group to be changed to obtain the target topology map. If the similarity is less than the preset threshold, the current topology map can be directly used as the target topology map.

[0136] In the first implementation, if the power supply module group to be changed is the same as the power supply module group to be deleted, then the historical topology map is adjusted according to the power supply module group to be changed to obtain the target topology map of the current charging gun, as follows: Figure 8 As shown, it includes:

[0137] S801. Based on the module group identifier of the power supply module group to be changed, determine the node of the power supply module group to be deleted corresponding to the module group identifier in the historical topology diagram.

[0138] S802. Delete the power supply module group node to be deleted and the corresponding switch node in the historical topology graph.

[0139] Among them, the switch node corresponding to the power supply module group node to be deleted can be the switch node between the power supply module group node to be deleted and the first node corresponding to the current charging gun.

[0140] For example, suppose the current charging gun node is Figure 1 If the power supply module group node to be deleted is M2, then M2 can be deleted in the historical topology diagram, and the switch node S2 between G1 and M2 can also be deleted.

[0141] In the second implementation, if the power supply module group to be changed is a power supply module group to be added, then the process described above—adjusting the historical topology map based on the nodes of the power supply module group to be changed to obtain the target topology map of the current charging gun—is as follows: Figure 9 As shown, it includes:

[0142] S901. Based on the module group identifier of the power supply module group to be changed, determine the node of the power supply module group to be added corresponding to the module group identifier in the historical topology diagram.

[0143] S902. Add the node of the power supply module group to be added and the corresponding switch node to the historical topology diagram.

[0144] Among them, the switch node corresponding to the node of the power supply module group to be added can be the switch node between the node of the power supply module group to be added and the first node of the current charging gun.

[0145] For example, suppose the first node of the current charging gun is Figure 1 If the power supply module group node to be added in this case is M3, then the power supply module group node M3 and the switch nodes S2 and S3 between M3 and G1 can also be added to the historical topology diagram.

[0146] This application also provides a charging system, the detailed architecture of which can be found in the following embodiments. Figure 1 , Figure 10 This is a schematic diagram of the overall architecture of a charging system. (Refer to...) Figure 10The charging system includes a power control unit, a switch control unit, multiple power supply module groups, multiple charging guns, and multiple switches. The power supply module groups communicate with the power control unit via a CAN network, the power control unit communicates with the switch control unit via a CAN network, the switch control unit communicates with each other via a CAN network, and the charging guns communicate with the power control unit via a CAN network.

[0147] When the charging gun needs to switch power to enter the working state, the power control unit can obtain the operating status of the power supply module group and send it to the processor of the charging system. The charging system can generate a target topology map based on the charging pile power allocation method of this application, and determine the switches that need to be opened or closed based on the target topology map. The control command is sent to the switch control unit, which controls the opening or closing of the switches, thereby forming the physical power supply circuit indicated by the target topology map.

[0148] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. The system embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between systems or units may be electrical, mechanical, or other forms.

[0149] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0150] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0151] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion 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 cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0152] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0153] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A power allocation method for charging piles, characterized in that, A charging system applied to a target charging pile, the charging system comprising: multiple charging guns and a power supply module group corresponding to each charging gun; each power supply module group establishing a connection with other power supply module groups outside the specified power supply module group via at least one switch; the method comprising: Based on the connection relationship between each power supply module group in the charging system, a global topology diagram is constructed. The global topology diagram includes: multiple charging gun nodes, multiple power supply module group nodes, and multiple switch nodes. Each charging gun node corresponds to one charging gun, each power supply module group node corresponds to one power supply module, and each switch node corresponds to one switch. During the current charging, the required number of power supply module groups is determined based on the power demand of the current charging gun among the plurality of charging guns; Based on the required number of power supply module groups and the global topology map, construct the current topology map; The current topology graph is compared with the historical topology graph to determine whether the historical topology graph should be used as the target topology graph. If so, the historical topology map is used as the target topology map; otherwise, based on the comparison between the historical topology map and the current topology map, at least one power supply module group node to be changed in the historical topology map is determined; based on the power supply module group node to be changed, the historical topology map is adjusted to obtain the target topology map of the current charging gun, wherein the historical topology map is the target topology map constructed by the current charging gun during the previous charging. According to the target topology diagram, adjust the state of the switch corresponding to at least one switch node in the target topology diagram so that the switch corresponding to at least one switch node in the target topology diagram is in a closed state, and supply power to the current charging gun through the power supply module group corresponding to all power supply module groups in the target topology diagram.

2. The method according to claim 1, characterized in that, The step of constructing the current topology map based on the required number of power supply module groups and the global topology map includes: A. Take the node corresponding to the current charging gun in the global topology graph as the first node in the current topology graph; B. Starting from the first node, sequentially search the global topology graph for at least one candidate power supply module group node that can be occupied on the first direction branch, the second direction branch, and the third direction branch connected to the first node. C. Determine whether the total number of nodes in the candidate power supply module group is greater than or equal to the required number; D. If so, then according to the connection relationship of each node in the global topology diagram, the first node and each of the candidate power supply module group nodes are combined to obtain the current topology diagram; E. If not, then each of the candidate power supply module group nodes is taken as the new first node, and steps B-E are executed again until the total number of candidate power supply module group nodes is greater than or equal to the required number. According to the connection relationship of each node in the global topology diagram, the first node is combined with each of the candidate power supply module group nodes to obtain the current topology diagram.

3. The method according to claim 2, characterized in that, Starting from the first node, the process of sequentially searching for at least one available candidate power supply module group node on the first directional branch connected to the first node in the global topology graph includes: Starting from the first node, search the global topology graph for the charging gun node connected to the first direction branch of the first node and the power supply module group node of the charging gun node; Determine whether the maximum output current of the power supply module group node of the first direction branch is less than a preset current threshold. If the maximum output current is less than the preset current threshold, then determine whether the charging gun node is a child node of the first node, and determine whether the power supply module group node of the charging gun node can be occupied according to the historical topology map. If the charging gun node is not a child node of the first node, and the power supply module group node is an available node, then the power supply module group node is selected as the candidate power supply module group node available for the current charging gun.

4. The method according to claim 3, characterized in that, The step of determining whether the power supply module group node of the charging gun node is available for use based on the historical topology map includes: Determine whether the charging gun node is in a working state; If the charging gun node is in working condition, then the power supply module group node is determined to be an unoccupiable node; If the charging gun node is not in operation, and the power supply module group node is not included in the historical topology diagram, and the power supply module group node is not a child node of the first node, then the power supply module group node is determined to be an available node; otherwise, the power supply module group node is determined to be an unavailable node.

5. The method according to claim 1, characterized in that, If the power supply module group node to be changed is the power supply module group node to be deleted, the step of adjusting the historical topology map according to the power supply module group node to be changed to obtain the target topology map of the current charging gun includes: Based on the module group identifier of the power supply module group to be changed, determine the power supply module group node to be deleted corresponding to the module group identifier in the historical topology diagram; Delete the node of the power supply module group to be deleted and the corresponding switch node of the power supply module group to be deleted from the historical topology map.

6. The method according to claim 1, characterized in that, If the power supply module group node to be changed is a power supply module group node to be added, the step of adjusting the historical topology map according to the power supply module group node to be changed to obtain the target topology map of the current charging gun includes: Based on the module group identifier of the power supply module group to be changed, determine the node of the power supply module group to be added corresponding to the module group identifier in the historical topology diagram; Add the node of the power supply module group to be added and the corresponding switch node of the power supply module group to be changed to the historical topology diagram.

7. A charging system, characterized in that, The charging system includes: multiple charging guns and power supply module groups corresponding to each charging gun; each power supply module group is connected to other power supply module groups outside the charging module group through at least one switch; when the charging system is running, the power distribution of the charging guns is realized by executing the charging pile power distribution method as described in any one of claims 1-6.

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