A power distribution apparatus, charging apparatus, device, control method, and system

Abstract

The application discloses a power distribution device, a charging device, equipment, a control method and a system, a switch unit is arranged on a line connected between each current input end and each current output end, so that when the power distribution device is actually applied to charging (the current input end is connected with a charging power unit, and the current output end is connected with a charging terminal), each charging terminal can directly call all charging power units in the device, thereby relatively reducing the number of enabled switches, simplifying switch control logic, and further reducing programming amount, lowering programming difficulty, and improving programming efficiency; moreover, the switches in the power distribution device are independent, and there is no situation that multiple switch currents flow into the same switch, so that all switches in the device can select a switch with a relatively small current flowing therethrough, which is beneficial to saving device cost.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle charging, and in particular to a power distribution device, charging device, equipment, control method, and system. Background Technology

[0002] Electric vehicle charging stations typically include multiple charging power units that convert AC power from the grid into DC power, and a charging topology for distributing the charging power to the charging guns. Currently, commonly used charging topologies include... Figure 1 As shown (mentioned in patent CN202010337478.9), Figure 1 In this system, the charging topology includes 6 charging power units (P1-P6), 15 pairs of DC contactors (K1-K15), and 6 charging guns (M1-M6, also known as charging terminals). Its working principle is to allocate charging power units to the charging guns by controlling the opening and closing of the DC contactors.

[0003] However, as Figure 1 The charging topology shown has the following problems:

[0004] 1) The charging gun cannot directly call all charging power units, resulting in a large number of contactors being activated. For example, when the charging gun M1 is in use, the charging gun M1 can only directly call the charging power units P1, P2, P4, and P6, while the charging power units P3 and P5 can only be called by the charging gun M1 by skipping one charging power unit. This results in a large number of contactors being activated when the charging gun M1 calls the charging power units, which in turn makes the contactor software control logic more complex, leading to a large amount of software programming, higher programming difficulty, and lower programming efficiency.

[0005] 2) The maximum current allowed to flow through each DC contactor must be greater than the maximum current it actually flows through. However, the current flowing through some DC contactors is the sum of the currents flowing through multiple DC contactors. For example, when the charging gun M1 is in use, if the charging gun M1 calls the charging power units P1, P2, and P6, then the current flowing through DC contactor K10 is the sum of the currents flowing through contactors K1 and K6. This means that these DC contactors need to be selected with a larger allowable current, which increases the cost.

[0006] Therefore, how to provide a solution to the above-mentioned technical problems is a problem that those skilled in the art need to solve at present. Summary of the Invention

[0007] The purpose of this invention is to provide a power distribution device, charging device, equipment, control method, and system. Each charging terminal can directly call all charging power units within the device, thereby reducing the number of activated switches, simplifying the switch control logic, and thus reducing programming workload, lowering programming difficulty, and improving programming efficiency. Moreover, the switches in the power distribution device of this application are all independent, and there is no situation where multiple switch currents flow into the same switch. Therefore, all switches in the device can be selected to allow relatively small current flows, which is beneficial for saving device costs.

[0008] To solve the above-mentioned technical problems, the present invention provides a power distribution device, comprising:

[0009] Multiple current input terminals;

[0010] Multiple switch groups, each of which includes multiple switch units, and different switch groups contain the same number of switch units;

[0011] Multiple first terminals, each first terminal being connected to the first terminal of a group of switch units in each group of switches, different first terminals being connected to different switch units, and each first terminal being connected to at least one current input terminal;

[0012] Multiple second terminals, the second terminals of all switch units in the same switch group intersect at the same second terminal, and the intersecting second terminals are different in different switch groups;

[0013] The current output terminal is connected to the second terminal.

[0014] Preferably, the number of switch groups is at least six.

[0015] Preferably, each of the switch groups includes at least three switch units.

[0016] To address the aforementioned technical problems, the present invention also provides a charging device, comprising any of the aforementioned power distribution devices, and further comprising:

[0017] A charging power unit is connected to the current input terminal.

[0018] To address the aforementioned technical problems, the present invention also provides a charging device, comprising any of the above-mentioned charging apparatuses, and further comprising:

[0019] A charging terminal is connected to the current output terminal; wherein all charging power units connected to the current input terminal at the same first terminal form the same power module group.

[0020] To address the aforementioned technical problems, the present invention also provides a control method applied to the aforementioned charging device, comprising:

[0021] The power supply priority of the power module group connected to the target terminal is sorted according to a preset order; wherein, the target terminal is any charging terminal;

[0022] Based on the power requirements of the target terminal and its corresponding power supply priority, a target power module group is determined from the idle power module group and allocated to the target terminal.

[0023] By controlling each switching unit within the charging device, the target terminal is connected to the target power module group to provide the target terminal with the required electrical energy.

[0024] Preferably, the process of determining the target power module group to be allocated to the target terminal from the idle power module group according to the power requirements of the target terminal and its corresponding power supply priority includes:

[0025] Based on the power requirements of the target terminal and the total number of idle power module groups, the number of power module groups allocated to the target terminal is determined; wherein, different power module groups contain the same number of charging power units;

[0026] Based on the power supply priority corresponding to the target terminal and the number of power module groups to be allocated, the target power module group to be allocated to the target terminal is determined from the idle power module groups.

[0027] Preferably, the process of determining the number of power module groups allocated to the target terminal based on the power requirements of the target terminal and the total number of idle power module groups includes:

[0028] The charging priority of each charging terminal is determined according to a preset charging priority setting strategy;

[0029] Under preset constraints, the number of power module groups allocated to each charging terminal is determined according to the power requirements of each charging terminal and the total number of idle power module groups. The preset constraints include prioritizing the power requirements of charging terminals with higher charging priority, allocating at least one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is less than the total number of power module groups, and allocating at most one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is greater than or equal to the total number of power module groups.

[0030] Preferably, the process of determining the target power module group to be allocated to the target terminal from the idle power module groups according to the power supply priority corresponding to the target terminal and the number of power module groups to be allocated includes:

[0031] According to the charging priority from high to low, the remaining idle power module groups are allocated to each charging terminal with power demand in turn, based on the power supply priority and the number of power module groups corresponding to each charging terminal with power demand.

[0032] To address the aforementioned technical problems, the present invention also provides a control system applied to the aforementioned charging device, comprising:

[0033] A power supply priority setting module is used to sort the power supply priorities of the power module group connected to the target terminal according to a preset order; wherein, the target terminal is any charging terminal;

[0034] The power module group allocation module is used to determine the target power module group to be allocated to the target terminal from the idle power module groups according to the power requirements of the target terminal and its corresponding power supply priority;

[0035] The switching unit control module is used to connect the target terminal to the target power module group by controlling each switching unit in the charging device, so as to provide the target terminal with the required electrical energy.

[0036] This invention provides a power distribution device, in which a switching unit is provided on the line connecting each current input terminal and each current output terminal. This allows each charging terminal to directly access all charging power units within the device when the power distribution device is actually used for charging (current input terminal connected to charging power unit, current output terminal connected to charging terminal). This reduces the number of activated switches, simplifies the switch control logic, and consequently reduces programming complexity, lowers programming difficulty, and improves programming efficiency. Furthermore, the switches in this power distribution device are all independent, eliminating the possibility of multiple switches receiving current from the same switch. Therefore, all switches within the device can be selected to handle relatively small current flows, which helps save on device costs.

[0037] The present invention also provides a charging device, equipment, control method and system, which have the same beneficial effects as the power distribution device described above. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a charging topology in the prior art.

[0040] Figure 2 This is a schematic diagram of the structure of a power distribution device provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of a charging device provided in an embodiment of the present invention;

[0042] Figure 4 This is an electrical connection schematic diagram of a charging device provided in an embodiment of the present invention;

[0043] Figure 5 A flowchart of a control method provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of a control system provided in an embodiment of the present invention. Detailed Implementation

[0045] The core of this invention is to provide a power distribution device, charging device, equipment, control method, and system. Each charging terminal can directly call all charging power units within the device, thereby reducing the number of activated switches, simplifying the switch control logic, and thus reducing programming workload, lowering programming difficulty, and improving programming efficiency. Moreover, the switches in the power distribution device of this application are all independent, and there is no situation where multiple switch currents flow into the same switch. Therefore, all switches in the device can be selected to allow relatively small current flows, which is beneficial for saving device costs.

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please refer to Figure 2 , Figure 2 This is a schematic diagram of a power distribution device provided in an embodiment of the present invention.

[0048] The power distribution device includes:

[0049] Multiple current input terminals A;

[0050] Multiple switch groups Z, each switch group Z includes multiple switch units U, and different switch groups Z contain the same number of switch units U;

[0051] Multiple first terminals B, each first terminal B is connected to the first end of a group of switch units U in each group of switch groups Z, and different first terminals B are connected to different switch units U. Each first terminal B is connected to at least one current input terminal A.

[0052] Multiple second terminals C, the second terminals of all switch units U in the same switch group Z intersect at the same second terminal C, and the corresponding intersecting second terminals C are different in different switch groups Z;

[0053] The current output terminal is connected to the second terminal C.

[0054] Specifically, the power distribution device includes multiple current input terminals A and current output terminals; wherein, the current input terminals A are used to connect to the charging power unit, and the current output terminals are used to connect to the charging terminal.

[0055] The power distribution device also includes multiple switch groups Z, multiple first terminals B, and multiple second terminals C. Each switch group Z includes multiple switch units U, and different switch groups Z contain the same number of switch units U. Each first terminal B is connected to the first end of a set of switch units U in each switch group Z. Different first terminals B are connected to different switch units U. Each first terminal B is connected to at least one current input terminal A. The second ends of all switch units U in the same switch group Z intersect at the same second terminal C. The second terminal C is connected to the current output terminal. Different switch groups Z have different intersecting second terminals C.

[0056] As can be seen, a switching unit is provided on the line connecting each current input terminal and each current output terminal. This allows each charging terminal to directly call all the charging power units in the device when the power distribution device is actually used for charging (the current input terminal is connected to the charging power unit, and the current output terminal is connected to the charging terminal). This reduces the number of activated switches, simplifies the switch control logic, and thus reduces the amount of programming, lowers the programming difficulty, and improves programming efficiency. Moreover, the switches in the power distribution device of this application are all independent, and there is no situation where multiple switch currents flow into the same switch. Therefore, all switches in the device can be selected to allow relatively small currents to flow through them, which helps to save device costs.

[0057] Based on the above embodiments:

[0058] As an optional embodiment, the number of switch groups Z is at least six.

[0059] Specifically, the number of switch groups Z in this application is six. Of course, the number of switch groups Z in this application may also be greater than six. This application does not make any special limitation here.

[0060] As an optional embodiment, each switch group Z includes at least three switch units U.

[0061] Specifically, each switch group Z in this application contains three switch units U. Of course, the number of switch units U in each switch group Z in this application may also be more than three. This application does not make any special limitation here.

[0062] This application also provides a charging device, including any of the power distribution devices described above, and further comprising:

[0063] The charging power unit is connected to the current input terminal A.

[0064] Specifically, the charging device of this application includes a power distribution device and a charging power unit, wherein the charging power unit is connected to a current input terminal A within the power distribution device. More specifically, in the power distribution device, each current input terminal A can be connected to one charging power unit. Of course, each current input terminal A can also be connected to multiple charging power units or not connected to any charging power unit; this application does not make any particular limitation here.

[0065] For a description of the power distribution device within the charging device provided in this application, please refer to the embodiments of the power distribution device described above; further details will not be repeated here.

[0066] This application also provides a charging device, including any of the above-mentioned charging devices, and further comprising:

[0067] The charging terminal is connected to the current output terminal; wherein, all the charging power units connected to the current input terminal A at the same first terminal B form the same power module group.

[0068] Specifically, the charging device of this application includes a charging unit and a charging terminal (such as a charging gun), and the charging terminal is connected to the current output terminal in the power distribution device. More specifically, in the power distribution device, each current output terminal can be connected to a charging terminal, or multiple current output terminals can be connected to the same charging terminal; this application does not make any particular limitation herein.

[0069] It should be noted that all charging power units connected to the current input terminal A at the same first terminal B form the same power module group.

[0070] More specifically, as described in the above embodiments, the following can be obtained: Figure 3 The charging device shown, Figure 4 For example Figure 3 The diagram shows the electrical connection schematic of the charging device. The charging device includes 6 charging terminals (represented by "M"), 3 power module groups (represented by "P"), and 18 switching units (represented by "K"). It should be noted that each switching unit group contains two switching units, separated by + and -. For example, in the first switching unit group K1, one switching unit is represented by K1+, and the other by K1- (other switching units are represented similarly, and will not be repeated here). Based on... Figure 3 The charging equipment shown can directly access all power module groups within the device for each charging terminal.

[0071] For a description of the charging device within the charging equipment provided in this application, please refer to the embodiments of the charging device described above; further details will not be repeated here.

[0072] Please refer to Figure 5 , Figure 5 A flowchart of a control method provided in an embodiment of the present invention.

[0073] This control method is applied to the above-mentioned charging equipment (the following embodiments are all described as follows). Figure 3 (Taking the charging device shown as an example), it includes:

[0074] Step S1: Sort the power supply priority of the power module group connected to the target terminal according to the preset order.

[0075] Specifically, this application sets the power supply priority for each power module group for each charging terminal, that is, sets the power supply order for each power module group for each charging terminal. For the target terminal (any charging terminal), the power module group with higher power supply priority will supply power to the target terminal first. For example, the power supply priority of the power module groups in this application is sorted according to a preset order.

[0076] More specifically, this application can number each power module group in the system in advance. For each charging terminal, the larger the number of the power module group, the lower the power supply priority (or the larger the power value that the remaining power module group can provide, the higher the power supply priority).

[0077] like Figure 3As shown, the system has power module groups P1, P2, and P3. Power module group P1 is numbered 1, power module group P2 is numbered 2, and power module group P3 is numbered 3. Therefore, power module group P1 is the highest priority power module group corresponding to charging terminals M1, M2, M3, M4, M5, and M6, while power module group P3 is the lowest priority power module group corresponding to charging terminals M1, M2, M3, M4, M5, and M6. See Table 1 below for details.

[0078] Table 1

[0079]

[0080] Step S2: Based on the power requirements of the target terminal and its corresponding power supply priority, determine the target power module group to be allocated to the target terminal from the idle power module group.

[0081] Specifically, this application can determine the target power module group to be allocated to the target terminal from the idle power module group based on the power requirements of the target terminal and the power supply priority corresponding to the target terminal.

[0082] Step S3: By controlling each switching unit in the charging device, connect the target terminal to the target power module group to provide the target terminal with the required power.

[0083] Specifically, after determining the target power module group to be allocated to the target terminal, this application connects the target terminal to the target power module group by controlling each switching unit in the charging device, thereby providing the target terminal with the required electrical energy.

[0084] As an optional embodiment, the process of determining the target power module group to be allocated to the target terminal from the idle power module group according to the power requirements of the target terminal and its corresponding power supply priority includes:

[0085] The number of power module groups allocated to the target terminal is determined based on the power requirements of the target terminal and the total number of idle power module groups; among them, different power module groups contain the same number of charging power units.

[0086] Based on the power supply priority corresponding to the target terminal and the number of power module groups to be allocated, the target power module group to be allocated to the target terminal is determined from the idle power module groups.

[0087] Specifically, this application determines the number of power module groups allocated to the target terminal based on the target terminal's power requirements and the total number of idle power module groups. Specifically, different power module groups contain the same number of charging power units, so each power module group can provide the same power value. It can be understood that, given the power value that each power module group can provide, the number of power module groups allocated to the target terminal can be determined based on the target terminal's power requirements and the total number of idle power module groups (the allocation basis is to maximize the satisfaction of the target terminal's power requirements while ensuring that the number of power module groups allocated to the target terminal does not exceed the total number of idle power module groups).

[0088] Then, based on the number of power module groups corresponding to the target terminal, this application sequentially determines the target power module groups to be allocated to the target terminal from the idle power module groups in descending order of the power supply priority corresponding to the target terminal, so that the target terminal can use them.

[0089] As an optional embodiment, the process of determining the number of power module groups allocated to the target terminal based on the power requirements of the target terminal and the total number of idle power module groups includes:

[0090] The charging priority of each charging terminal is determined according to the preset charging priority setting strategy.

[0091] Under preset constraints, the number of power module groups allocated to each charging terminal is determined according to the power demand of each charging terminal and the total number of idle power module groups. The preset constraints include prioritizing the power demand of charging terminals with higher charging priority, and allocating at least one power module group to each charging terminal with power demand when the number of charging terminals with power demand is less than the total number of power module groups, and allocating at most one power module group to each charging terminal with power demand when the number of charging terminals with power demand is greater than or equal to the total number of power module groups.

[0092] Specifically, this application pre-sets a charging priority setting strategy, which can be: the charging terminal that connects to the device to be charged (electric vehicle) first has a higher charging priority, and the power demand of the charging terminal with the higher charging priority is met first; or it can be: the charging priority of each charging terminal is directly set, and once set, the charging priority of each charging terminal remains fixed.

[0093] Based on this, this application determines the charging priority of each charging terminal according to a preset charging priority setting strategy. Then, it prioritizes meeting the power demand of charging terminals with higher charging priority. Under the constraints that at least one power module group is allocated to each charging terminal with power demand when the number of charging terminals with power demand is less than the total number of power module groups, and at most one power module group is allocated to each charging terminal with power demand when the number of charging terminals with power demand is greater than or equal to the total number of power module groups, the number of power module groups allocated to each charging terminal is determined according to the power demand of each charging terminal and the total number of idle power module groups.

[0094] As an optional embodiment, the process of determining the target power module group to be allocated to the target terminal from the idle power module groups, based on the power supply priority corresponding to the target terminal and the number of allocated power module groups, includes:

[0095] According to the charging priority from high to low, the remaining idle power module groups are allocated to each charging terminal with power demand in turn, based on the power supply priority and the number of power module groups corresponding to each charging terminal with power demand.

[0096] Furthermore, when the power demand of the target terminal decreases, this application can determine the number of power module groups that the target terminal needs to disconnect based on the reduced power demand of the target terminal, and then control each switching unit to prioritize disconnecting the connection between the target terminal and its corresponding power module group with lower power supply priority based on the number of power module groups that the target terminal needs to disconnect, thereby meeting the reduced power demand of the target terminal.

[0097] For example, taking charging terminal M1 as an example, if charging terminal M1 has power requirements, it is determined that charging terminal M1 is allocated 3 power module groups, as shown in the case of row M1 in Table 1 above. Therefore, the 3 power module groups allocated to charging terminal M1 are P1, P2, and P3. When the power requirements of charging terminal M1 decrease, the number of power module groups that charging terminal M1 needs to disconnect is determined based on the decrease in power requirements. Then, based on the number of power module groups that charging terminal M1 needs to disconnect, each switching unit is controlled to prioritize disconnecting the connection between charging terminal M1 and its corresponding lower-priority power module groups. For example, if the number of power module groups that charging terminal M1 needs to disconnect is 2, then each switching unit is controlled to prioritize disconnecting the connection between charging terminal M1 and power module groups P2 and P3.

[0098] Furthermore, when a power module group is released in the charging system, this application can determine whether there are any unoptimized terminals among the charging terminals that do not meet the power requirements. If such terminals exist, the charging priority of each unoptimized terminal is determined according to a preset charging priority setting strategy. Then, in descending order of charging priority, the released power module groups are allocated to each unoptimized terminal according to its corresponding power supply priority. Each switching unit is controlled to connect the newly allocated power module group to its corresponding unoptimized terminal until all unoptimized terminals meet their power requirements. After all charging terminals have finished charging, all switching units are disconnected, and the power module groups are released.

[0099] For example, taking charging terminals M1, M2, M3, and M4 as examples, their charging priorities from highest to lowest are M1, M2, M3, and M4. If charging terminals M1, M2, M3, and M4 have power requirements, power module group P1 is prioritized for charging terminal M1, power module group P2 for charging terminal M2, and power module group P3 for charging terminal M3. At this time, charging terminal M4 has no power module group available for allocation and is in a waiting state. When any power module group becomes available, that power module group is used to charge charging terminal M4, as shown in Table 2 below.

[0100] Table 2

[0101]

[0102]

[0103] Please refer to Figure 6 , Figure 6 A schematic diagram of the structure of a control system provided in an embodiment of the present invention.

[0104] The control system is applied to the aforementioned charging equipment and includes:

[0105] The power supply priority setting module 1 is used to sort the power supply priority of the power module group connected to the target terminal according to a preset order; wherein, the target terminal is any charging terminal.

[0106] Power module group allocation module 2 is used to determine the target power module group to be allocated to the target terminal from the idle power module group according to the power demand of the target terminal and its corresponding power supply priority;

[0107] The switching unit control module 3 is used to connect the target terminal to the target power module group by controlling each switching unit in the charging equipment, so as to provide the target terminal with the required power.

[0108] For a description of the control system provided in this application, please refer to the embodiments of the control method described above; further details will not be repeated here.

[0109] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0110] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method, characterized in that, Applied to charging equipment, the charging equipment includes a charging device and a charging terminal, wherein the charging terminal is connected to a current output terminal; wherein, all charging power units connected to the current input terminal at the same first terminal form the same power module group; The charging device includes a power distribution device and a charging power unit, wherein the charging power unit is connected to the current input terminal; The power distribution device includes: Multiple current input terminals; Multiple switch groups, each of which includes multiple switch units, and different switch groups contain the same number of switch units; Multiple first terminals, each first terminal being connected to the first terminal of a group of switch units in each group of switches, different first terminals being connected to different switch units, and each first terminal being connected to at least one current input terminal; Multiple second terminals, the second terminals of all switch units in the same switch group intersect at the same second terminal, and the intersecting second terminals are different in different switch groups; A current output terminal, which is connected to the second terminal; Control methods include: The power supply priority of the power module groups connected to the target terminal is sorted according to a preset order; wherein, the target terminal is any charging terminal; for the target terminal, the power module groups with higher power supply priority will give priority to supplying power to the target terminal. Based on the power requirements of the target terminal and its corresponding power supply priority, a target power module group is determined from the idle power module group and allocated to the target terminal. By controlling each switching unit within the charging device, the target terminal is connected to the target power module group to provide the target terminal with the required electrical energy. The process of determining the target power module group to be allocated to the target terminal from the idle power module group according to the power requirements of the target terminal and its corresponding power supply priority includes: Based on the power requirements of the target terminal and the total number of idle power module groups, the number of power module groups allocated to the target terminal is determined; wherein, different power module groups contain the same number of charging power units; and each power module group can provide the same power value; Based on the power supply priority corresponding to the target terminal and the number of power module groups to be allocated, the target power module group to be allocated to the target terminal is determined from the idle power module groups; Also includes: Each power module group should be numbered in advance; the higher the number of the power module group, the lower the power supply priority. The process of determining the number of power module groups allocated to the target terminal based on the target terminal's power requirements and the total number of idle power module groups includes: The charging priority of each charging terminal is determined according to a preset charging priority setting strategy; once set, the charging priority of each charging terminal remains fixed. Under preset constraints, the number of power module groups allocated to each charging terminal is determined according to the power requirements of each charging terminal and the total number of idle power module groups. The preset constraints include prioritizing the power requirements of charging terminals with higher charging priority, and allocating at least one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is less than the total number of power module groups, and allocating at most one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is greater than or equal to the total number of power module groups. The process of determining the target power module group to be allocated to the target terminal from the idle power module groups, based on the power supply priority corresponding to the target terminal and the determined number of power module groups, includes: According to the charging priority from high to low, the remaining idle power module groups are allocated to each of the charging terminals with power demand in turn, based on the power supply priority and the number of power module groups corresponding to each of the charging terminals with power demand. Also includes: When a power module group is released, it is determined whether there are any unoptimized terminals among the charging terminals that do not meet the power requirements. If there are unoptimized terminals that do not meet the power requirements, the charging priority of each unoptimized terminal is determined according to the preset charging priority setting strategy. Then, according to the order of charging priority from high to low, the released power module group is allocated to each unoptimized terminal in turn according to the power supply priority corresponding to each unoptimized terminal. The switch unit is controlled to connect the newly allocated power module group to the connection line of the corresponding unoptimized terminal until each unoptimized terminal meets the power requirements.

2. The control method as described in claim 1, characterized in that, The number of switch groups is at least six.

3. The control method as described in claim 2, characterized in that, Each of the aforementioned switch groups includes at least three switch units.

4. A control system, characterized in that, The control method as described in claim 1 includes: A power supply priority setting module is used to sort the power supply priority of power module groups connected to the target terminal according to a preset order; wherein, the target terminal is any charging terminal; for the target terminal, the power module group with higher power supply priority will give priority to powering the target terminal. The power module group allocation module is used to determine the target power module group to be allocated to the target terminal from the idle power module groups according to the power requirements of the target terminal and its corresponding power supply priority; The switching unit control module is used to connect the target terminal to the target power module group by controlling each switching unit in the charging device, so as to provide the target terminal with the required electrical energy. The power module group allocation module is specifically used for: Based on the power requirements of the target terminal and the total number of idle power module groups, the number of power module groups allocated to the target terminal is determined; wherein, different power module groups contain the same number of charging power units; and each power module group can provide the same power value; Based on the power supply priority corresponding to the target terminal and the number of power module groups to be allocated, the target power module group to be allocated to the target terminal is determined from the idle power module groups; The control system is also used to: number each power module group in advance; where the larger the number of the power module group, the lower the power supply priority; The process of determining the number of power module groups allocated to the target terminal based on the target terminal's power requirements and the total number of idle power module groups includes: The charging priority of each charging terminal is determined according to a preset charging priority setting strategy; once set, the charging priority of each charging terminal remains fixed. Under preset constraints, the number of power module groups allocated to each charging terminal is determined according to the power requirements of each charging terminal and the total number of idle power module groups. The preset constraints include prioritizing the power requirements of charging terminals with higher charging priority, and allocating at least one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is less than the total number of power module groups, and allocating at most one power module group to each charging terminal with power requirements when the number of charging terminals with power requirements is greater than or equal to the total number of power module groups. The process of determining the target power module group to be allocated to the target terminal from the idle power module groups, based on the power supply priority corresponding to the target terminal and the determined number of power module groups, includes: According to the charging priority from high to low, the remaining idle power module groups are allocated to each of the charging terminals with power demand in turn, based on the power supply priority and the number of power module groups corresponding to each of the charging terminals with power demand. The control system is also used for: When a power module group is released, it is determined whether there are any unoptimized terminals among the charging terminals that do not meet the power requirements. If there are unoptimized terminals that do not meet the power requirements, the charging priority of each unoptimized terminal is determined according to the preset charging priority setting strategy. Then, according to the order of charging priority from high to low, the released power module group is allocated to each unoptimized terminal in turn according to the power supply priority corresponding to each unoptimized terminal. The switch unit is controlled to connect the newly allocated power module group to the connection line of the corresponding unoptimized terminal until each unoptimized terminal meets the power requirements.

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