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, wherein each of first switch units connected adjacently has a first wiring terminal, at least one current input terminal is connected to each first wiring terminal, each of second switch units connected adjacently has a second wiring terminal, the second wiring terminal is connected to the first wiring terminal corresponding in structure, and a current output terminal is connected to the first wiring terminal and the second wiring terminal, so that when the power distribution device is actually applied to charging (the current input terminal is connected to a charging power unit, and the current output terminal is connected to a charging terminal), two distribution branches corresponding to the charging terminal and the charging power unit connected to different wiring terminals are provided, if a switch unit on one of the distribution branches fails, the other distribution branch can be used, and therefore the fault tolerance and reliability of the power distribution device are improved.

Description

Technical Field

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

[0002] Charging stations for electric vehicles are usually equipped with multiple charging power units for converting AC power input from the power grid into DC power, and a charging topology for allocating charging power units to charging terminals (charging guns). The charging topology includes several contactors, which allocate charging power units to charging terminals by controlling the opening status of the contactors.

[0003] However, in most existing charging topologies, there is only one distribution branch between a charging terminal (called a target charging terminal) and a charging power unit (called a target charging power unit). By turning on the contactor on this distribution branch, the target charging power unit can be allocated to the target charging terminal for use. However, if the contactor on this distribution branch fails, the target charging power unit cannot be allocated to the target charging terminal for use, resulting in low fault tolerance and reliability of the charging topology.

[0004] Therefore, how to provide a solution to the above technical problems is a problem that technicians in this field currently need to solve. Summary of the Invention

[0005] The purpose of the present invention is to provide a power distribution device, a charging device, an equipment, a control method and a system, so that when the power distribution device is actually used for charging (the current input end is connected to the charging power unit, and the current output end is connected to the charging terminal), there are two corresponding distribution branches between the charging terminal and the charging power unit connected to different terminal terminals. If the switch unit on one of the distribution branches fails, the other distribution branch can be used, thereby improving the fault tolerance and reliability of the power distribution device.

[0006] To solve the above technical problems, the present invention provides a power distribution device, comprising:

[0007] Multiple current input terminals;

[0008] at least three groups of first switch units;

[0009] at least three groups of second switch units;

[0010] a first circuit, wherein a plurality of groups of the first switch units are sequentially connected to form a closed loop of the first circuit, adjacent first switch units are each provided with a first connection terminal, and each first connection terminal is connected to at least one of the current input terminals;

[0011] a second circuit, wherein a plurality of groups of the second switch units are sequentially connected to form a closed loop of the second circuit, wherein adjacent second switch units are each provided with a second terminal, and the second terminal is connected to a first terminal corresponding thereto in structure;

[0012] A current output terminal is connected to the first wiring terminal and the second wiring terminal.

[0013] Preferably, the power distribution device further includes:

[0014] The third switch unit, the second terminal is connected to its structurally corresponding first terminal through the third switch unit, and each of the second terminals is connected to at least one of the current input terminals.

[0015] Preferably, the number of the first switch units is three groups.

[0016] Preferably, the number of the second switch units is three.

[0017] Preferably, the number of the third switch units is three groups, and each of the second wiring terminals is connected to its structurally corresponding first wiring terminal through a group of the third switch units.

[0018] Preferably, each of the first wiring terminals and each of the second wiring terminals is connected to one of the current output terminals.

[0019] To solve the above technical problems, the present invention further provides a charging device, comprising any of the above power distribution devices, and further comprising:

[0020] A charging power unit is connected to the current input end.

[0021] In order to solve the above technical problems, the present invention further provides a charging device, comprising the above charging device, and further comprising:

[0022] A charging terminal is connected to the current output end; wherein all charging power units corresponding to the current input end at the same terminal constitute the same power module group.

[0023] Preferably, the charging device further includes:

[0024] A fourth switch unit, wherein the first terminal and the second terminal are both connected to the current output terminal through the fourth switch unit.

[0025] To solve the above technical problems, the present invention further provides a control method, which is applied to any of the above charging devices, comprising:

[0026] The power module group closest to the target terminal in terms of connection position is used as the power module group with the highest power supply priority corresponding to the target terminal; wherein the target terminal is any charging terminal;

[0027] The power module group farthest from the target terminal in terms of connection position is used as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are sorted according to a preset order;

[0028] Determining, according to the power demand of the target terminal and its corresponding power supply priority, a target power module group to be allocated to the target terminal from the idle power module groups;

[0029] By controlling the switch units in the charging device, the target terminal is connected to the target power module group to provide the target terminal with the required electrical energy.

[0030] To solve the above technical problems, the present invention further provides a control system, which is applied to any of the above charging devices, comprising:

[0031] a power supply priority setting module, configured to set the power module group closest to the target terminal in connection position as the power module group with the highest power supply priority corresponding to the target terminal, and set the power module group farthest from the target terminal in connection position as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are sorted in a preset order; the target terminal is any charging terminal;

[0032] a power module group allocating module, configured to determine a target power module group to be allocated to the target terminal from the idle power module groups according to the power demand of the target terminal and its corresponding power supply priority;

[0033] The switch unit control module is used to connect the target terminal with the target power module group by controlling the switch units in the charging device to provide the target terminal with the required electric energy.

[0034] The present invention provides a power distribution device, wherein adjacent first switch units are each provided with a first terminal, and each first terminal is connected to at least one current input terminal, and adjacent second switch units are each provided with a second terminal, and the second terminal is connected to the first terminal to which it corresponds in structure, and the current output terminal is connected to the first terminal and the second terminal. 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), two distribution branches correspond to each other between the charging terminal and the charging power unit connected to different terminals. If the switch unit on one of the distribution branches fails, the other distribution branch can be used, thereby improving the fault tolerance and reliability of the power distribution device.

[0035] The present invention also provides a charging device, equipment, control method and system, which have the same beneficial effects as the above-mentioned power distribution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A schematic structural diagram of a first power distribution device provided in an embodiment of the present invention;

[0038] Figure 2 A schematic structural diagram of a second power distribution device provided in an embodiment of the present invention;

[0039] Figure 3 A schematic structural diagram of a first charging device provided in an embodiment of the present invention;

[0040] Figure 4 A schematic structural diagram of a second charging device provided in an embodiment of the present invention;

[0041] Figure 5 An electrical connection schematic diagram of a second charging device provided by an embodiment of the present invention;

[0042] Figure 6 A flow chart of a control method provided by an embodiment of the present invention;

[0043] Figure 7 A schematic structural diagram of a control system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The core of the present invention is to provide a power distribution device, charging device, equipment, control method and system, so that when the power distribution device is actually used for charging (the current input end is connected to the charging power unit, and the current output end is connected to the charging terminal), there are two corresponding distribution branches between the charging terminal and the charging power unit connected to different terminal terminals. If the switch unit on one of the distribution branches fails, the other distribution branch can be used, thereby improving the fault tolerance and reliability of the power distribution device.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a first power distribution device provided in an embodiment of the present invention.

[0047] The power distribution device comprises:

[0048] Multiple current input terminals A;

[0049] At least three groups of first switch units U1;

[0050] At least three groups of second switch units U2;

[0051] A first circuit, wherein multiple groups of first switch units U1 are sequentially connected to form a closed-loop first circuit, wherein adjacent first switch units U1 are each provided with a first terminal B, and each first terminal B is connected to at least one current input terminal A;

[0052] A second circuit, wherein multiple groups of second switch units U2 are sequentially connected to form a closed-loop second circuit, wherein adjacent second switch units U2 are each provided with a second terminal C, and the second terminal C is connected to a first terminal B corresponding thereto in structure;

[0053] The current output terminal is connected to the first terminal B and 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 further includes a first switch unit U1 and a second switch unit U2; wherein, the number of the first switch units U1 is at least three groups, and the multiple groups of first switch units U1 are connected in sequence to form a closed-loop first circuit. Adjacent first switch units U1 are each provided with a first terminal B, and each first terminal B is connected to at least one current input terminal A. The number of the second switch units U2 is at least three groups, and the multiple groups of second switch units U2 are connected in sequence to form a closed-loop second circuit. Adjacent second switch units U2 are each provided with a second terminal C. If the number of the first switch units U1 and the second switch units U2 is the same, then the number of the first terminal B and the second terminal C are the same, and the two correspond one-to-one, and the second terminal C is connected to the first terminal B to which it corresponds in structure. It should also be noted that the current output terminal is connected to the first terminal B and the second terminal C, specifically, each first terminal B is connected to a current output terminal, and each second terminal C is connected to a current output terminal.

[0056] Reference Figure 1 Analyzing the above structure, the first terminals at both ends of the switch unit K7 are called terminal B1 and terminal B2, respectively. Assume that terminal B1 and terminal B2 are each connected to a charging power unit and a charging terminal. Specifically, the charging power unit connected to terminal B1 is called P1 and the charging terminal is called M1, and the charging power unit connected to terminal B2 is called P2 and the charging terminal is called M2. Then, there are two corresponding distribution branches between the charging terminal M1 connected to terminal B1 and the charging power unit P2 connected to terminal B2 (switch unit K7 is one of the distribution branches, and switch unit K14 is the other distribution branch). Similarly, it can be seen that there are two corresponding distribution branches between the charging terminal and the charging power unit connected to different terminals. If the switch unit on one distribution branch fails, the other distribution branch can be used, thereby improving the fault tolerance and reliability of the power distribution device.

[0057] Based on the above embodiment:

[0058] Please refer to Figure 2 , Figure 2 This is a structural diagram of a second power distribution device provided by an embodiment of the present invention.

[0059] As an optional embodiment, the power distribution device further includes:

[0060] The third switch unit U3 , the second terminal C is connected to its structurally corresponding first terminal B through the third switch unit U3 , and each second terminal C is connected to at least one current input terminal A.

[0061] Furthermore, the power distribution device of the present application further includes a third switch unit U3, through which the second terminal C is connected to its structurally corresponding first terminal B, and each second terminal C is connected to at least one current input terminal A. As an optional embodiment, the number of first switch units U1 is three.

[0062] Specifically, the number of the first switch units U1 in the present application is three groups. Of course, the number of the first switch units U1 in the present application may also be greater than three groups, and the present application does not make any special limitation here.

[0063] As an optional embodiment, the number of the second switch units U2 is three groups.

[0064] Specifically, the number of the second switch units U2 of the present application is three groups. Of course, the number of the second switch units U2 of the present application may also be greater than three groups, and the present application does not make any special limitation here.

[0065] As an optional embodiment, the number of the third switch units U3 is three groups, and each second terminal C is connected to its structurally corresponding first terminal B through a group of third switch units U3.

[0066] Specifically, when the number of first switch units U1 and second switch units U2 are both three groups, there are three first terminals B and three second terminals C. The number of third switch units U3 in this application is three groups, and each first terminal B is connected to its structurally corresponding second terminal C through a group of third switch units U3. Of course, the number of third switch units U3 in this application may also be greater than three groups, and there may be one or more first terminals B, which are connected to their structurally corresponding second terminals C through multiple groups of third switch units U3. This application does not make any special restrictions here.

[0067] As an optional embodiment, each first terminal B and each second terminal C is connected to a current output terminal.

[0068] Specifically, under most existing charging topologies, it is impossible to allocate charging power units to all charging terminals at the same time. As a result, when all charging terminals are connected to electric vehicles that need to be charged, some electric vehicles cannot be charged in time. They need to wait until other electric vehicles are charged and the charging power units are idle before they can start charging, resulting in longer charging time and poor user experience.

[0069] In the power distribution device of the present application, each first terminal B and each second terminal C are connected to at least one current input terminal A, and each first terminal B and each second terminal C are connected to a current output terminal, so that 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), a charging power unit can be allocated to all charging terminals at the same time. When all charging terminals are connected to electric vehicles that need to be charged, all electric vehicles can start charging, thereby shortening the charging time and providing a better user experience.

[0070] The present application also provides a charging device, comprising any of the above-mentioned power distribution devices, and further comprising:

[0071] The charging power unit is connected to the current input terminal A.

[0072] Specifically, the charging device of the present application includes a power distribution device and a charging power unit, and the charging power unit is connected to the current input terminal A in the power distribution device. More specifically, in the power distribution device, each current input terminal A can be connected to a charging power unit. Of course, each current input terminal A can also be connected to multiple charging power units or no charging power unit, and this application does not make any special restrictions here.

[0073] For an introduction to the power distribution device in the charging device provided in this application, please refer to the above-mentioned embodiments of the power distribution device, and this application will not go into details here.

[0074] The present application also provides a charging device, comprising the above-mentioned charging device, and further comprising:

[0075] 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 terminal constitute the same power module group.

[0076] Specifically, the charging device of the present application includes a charging device 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 special restrictions here.

[0077] It should be noted that all charging power units connected to the current input terminal A at the same terminal constitute the same power module group. For example, if the same first terminal B is connected to at least one current input terminal A, all charging power units connected to these current input terminals A constitute the same power module group; if the same second terminal C is connected to at least one current input terminal A, all charging power units connected to these current input terminals A constitute the same power module group.

[0078] As an optional embodiment, the charging device further includes:

[0079] The fourth switch unit U4 , the first terminal B and the second terminal C are both connected to the current output terminal through the fourth switch unit U4 .

[0080] Furthermore, the charging device of the present application further includes a fourth switch unit U4 , and the first terminal B and the second terminal C are both connected to the current output end through at least one fourth switch unit U4 .

[0081] Specifically, according to the description of the above embodiment, the following can be obtained: Figure 3 The charging device shown in FIG. 1 includes 6 charging terminals (denoted by “M”), 3 power module groups (denoted by “P”) and 12 switch units (denoted by “K”). Figure 3 In the charging device shown, two distribution branches correspond to each charging terminal and charging power unit connected to different wiring terminals. If the switch unit on one distribution branch fails, the other distribution branch can be used, thereby improving the fault tolerance and reliability of the power distribution device.

[0082] In addition, according to the above embodiment, the following can be obtained: Figure 4 The charging equipment shown, Figure 5 For example Figure 4 The electrical connection principle diagram of the charging device shown in the figure. The charging device includes 6 charging terminals (denoted by "M"), 6 power module groups (denoted by "P") and 15 groups of switch units (denoted by "K"). It should be noted that each group of switch units contains two switch units, and the two switch units are separately represented by + and -. For example, in the first group of switch units K1, one switch unit is represented by K1+ and the other switch unit is represented by K1- (the other groups of switch units are also represented in the same way, which will not be repeated in this application). Based on the following Figure 4 The charging device shown can simultaneously assign a charging power unit to all charging devices.

[0083] For an introduction to the charging device in the charging equipment provided in this application, please refer to the above-mentioned embodiment of the charging device, and this application will not go into details here.

[0084] Please refer to Figure 6 , Figure 6 A flow chart of a control method provided by an embodiment of the present invention.

[0085] The control method is applicable to any of the above charging devices (the following embodiments are described as follows Figure 4 As an example, the charging device shown in Figure 3 The charging principle of the charging device shown is similar to that of the charging device, and reference can be made to each other, and this application will not repeat it here), including:

[0086] Step S1: The power module group closest to the target terminal in the connection position is used as the power module group with the highest power supply priority corresponding to the target terminal, and the power module group farthest from the target terminal in the connection position is used as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are sorted according to a preset order.

[0087] Specifically, the present application sets the power supply priority of each power module group for each charging terminal, that is, sets the power supply order of each power module group for each charging terminal. For the target terminal (any charging terminal), the power module group with a higher power supply priority will be given priority to supply power to the target terminal. For example, the present application may use the power module group closest to the target terminal in terms of connection position as the power module group with the highest power supply priority corresponding to the target terminal, and use the power module group farthest from the target terminal in terms of connection position as the power module group with the lowest power supply priority corresponding to the target terminal. The power supply priorities of the remaining power module groups are arranged according to a preset order.

[0088] More specifically, the present application may number the first power module group connected to the first terminal in a clockwise direction according to its connection position in the closed-loop circuit, and number the second power module group connected to the second terminal in a clockwise direction according to its connection position in the closed-loop circuit; wherein the number of the second power module group is greater than the number of the first power module group; and the second power module group, which is structurally opposite to the first power module group with the smallest number, has the smallest number.

[0089] like Figure 4As shown, the power module groups connected to the first terminal are P1, P2, and P3, and are numbered clockwise according to their connection positions in the closed-loop circuit: power module group P1 is numbered 1, power module group P2 is numbered 2, and power module group P3 is numbered 3. The power module groups connected to the second terminal are P4, P5, and P6, and are numbered clockwise according to their connection positions in the closed-loop circuit: power module group P4 is numbered 4, power module group P5 is numbered 5, and power module group P6 is numbered 6. The power module group closest to the charging terminal M1 at the connection position is P1, and the power module group farthest from the connection position is P6; the power module group closest to the charging terminal M2 at the connection position is P2, and the power module group farthest from the connection position is P6; the power module group closest to the charging terminal M3 at the connection position is P3, and the power module group farthest from the connection position is P5; the power module group closest to the charging terminal M4 at the connection position is P4, and the power module group farthest from the connection position is P3; the power module group closest to the charging terminal M5 at the connection position is P5, and the power module group farthest from the connection position is P3; the power module group closest to the charging terminal M6 at the connection position is P6, and the power module group farthest from the connection position is P2.

[0090] Power module group P1 is the power module group with the highest power supply priority corresponding to charging terminal M1, power module group P6 is the power module group with the lowest power supply priority corresponding to charging terminal M1, and the power supply priorities of the remaining power module groups, from high to low, are: P2, P3, P4, P5. Power module group P2 is the power module group with the highest power supply priority corresponding to charging terminal M2, power module group P6 is the power module group with the lowest power supply priority corresponding to charging terminal M2, and the power supply priorities of the remaining power module groups, from high to low, are: P1, P3, P5, P4. Power module group P3 is the power module group with the highest power supply priority corresponding to charging terminal M3, power module group P5 is the power module group with the lowest power supply priority corresponding to charging terminal M3, and the power supply priorities of the remaining power module groups, from high to low, are: P1, P2, P6, P4. Power module group P4 is the power module group with the highest power supply priority corresponding to charging terminal M4, power module group P3 is the power module group with the lowest power supply priority corresponding to charging terminal M4, and the power supply priorities of the remaining power module groups, from high to low, are: P1, P5, P6, P2. Power module group P5 is the power module group with the highest power supply priority corresponding to charging terminal M5, power module group P3 is the power module group with the lowest power supply priority corresponding to charging terminal M5, and the power supply priorities of the remaining power module groups, from high to low, are: P2, P4, P6, P1. Power module group P6 is the power module group with the highest power supply priority corresponding to charging terminal M6, power module group P2 is the power module group with the lowest power supply priority corresponding to charging terminal M6, and the power supply priorities of the remaining power module groups, from high to low, are: P3, P4, P5, P1. For details, please refer to Table 1 below:

[0091] Table 1

[0092]

[0093]

[0094] Step S2: According to the power demand of the target terminal and its corresponding power supply priority, a target power module group allocated to the target terminal is determined from the idle power module groups.

[0095] Specifically, the present application may determine the target power module group allocated to the target terminal from the idle power module groups according to the power demand of the target terminal and the power supply priority corresponding to the target terminal.

[0096] Step S3: connecting the target terminal to the target power module group by controlling the switch units in the charging device to provide the target terminal with the required electrical energy.

[0097] Specifically, after determining the target power module group assigned to the target terminal, the present application connects the target terminal with the target power module group by controlling the switch units in the charging device, thereby providing the target terminal with the required electrical energy.

[0098] As an optional embodiment, the process of determining a target power module group allocated to the target terminal from idle power module groups according to the power requirement of the target terminal and its corresponding power supply priority includes:

[0099] Determine the charging priority of each charging terminal according to a preset charging priority setting strategy;

[0100] Under preset constraints, the number of power module groups allocated to each charging terminal is determined based on the power requirements of each charging terminal and the total number of idle power module groups. Different power module groups contain the same number of charging power units. The preset constraints include prioritizing the power requirements of charging terminals with higher charging priorities and allocating at least one power module group to charging terminals with power requirements.

[0101] Prioritize allocating the power module group with the highest power supply priority corresponding to each charging terminal with power demand to each charging terminal;

[0102] Based on the power module group with the highest power supply priority, the remaining idle power module groups are allocated to each charging terminal with power demand in descending order of charging priority, according to the power supply priority and the number of power module groups corresponding to each charging terminal with power demand.

[0103] Specifically, the present application sets up a charging priority setting strategy in advance, which can be: the charging priority of the charging terminal that is first connected to the device to be charged (electric vehicle) is higher, and the power demand of the charging terminal with higher charging priority is met first; it can also be: directly set the charging priority of each charging terminal. Once set, the charging priority of each charging terminal will remain fixed.

[0104] Based on this, the present application determines the charging priority of each charging terminal according to a preset charging priority setting strategy, and then, under the constraints of giving priority to meeting the power requirements of charging terminals with higher charging priorities and allocating at least one power module group to charging terminals with power requirements, determines the number of power module groups allocated to each charging terminal according to the power requirements of each charging terminal and the total number of idle power module groups (it should be noted that the number of charging power units contained in different power module groups is the same, that is, the power value that each power module group can provide is the same).

[0105] Then, this application prioritizes allocating the power module group with the highest power supply priority corresponding to each charging terminal with power demand to each charging terminal, and then, based on the power module group with the highest power supply priority that has been allocated, allocates the remaining idle power module groups to each charging terminal with power demand in order of charging priority from high to low, according to the power supply priority and the number of power module groups corresponding to each charging terminal with power demand.

[0106] Taking charging terminals M1 and M2 as an example, the charging priority of charging terminal M1 is higher than that of charging terminal M2. If charging terminals M1 and M2 have power requirements, the power module group P1 with the highest power supply priority corresponding to charging terminal M1 is preferentially allocated to charging terminal M1, and the power module group P2 with the highest power supply priority corresponding to charging terminal M2 is preferentially allocated to charging terminal M2. Then, based on the power module group with the highest power supply priority that has been allocated, the remaining idle power module groups are first allocated to charging terminal M1 according to the power supply priority and the number of power module groups corresponding to charging terminal M1, in descending order of charging priority (skipping the already allocated power module groups). Then, based on the power supply priority and the number of power module groups corresponding to charging terminal M2, in descending order of charging priority, the remaining idle power module groups are allocated to charging terminal M2 (skipping the already allocated power module groups). The specific allocation situations are shown in Table 2 below:

[0107] Table 2

[0108]

[0109]

[0110] Furthermore, the present application can also determine the number of power module groups that need to be disconnected by the target terminal according to the reduced power demand of the target terminal when the power demand of the target terminal is reduced, and then control each switch unit to preferentially disconnect the connection between the target terminal and its corresponding power module group with a lower power supply priority according to the number of power module groups that need to be disconnected by the target terminal, so as to meet the reduced power demand of the target terminal.

[0111] For example, taking charging terminal M1 as an example, if charging terminal M1 has a power demand, it is determined that six power module groups are allocated to charging terminal M1. As shown in the M1 row in Table 1 above, the six power module groups allocated to charging terminal M1 are P1, P2, P3, P4, P5, and P6. When the power demand of charging terminal M1 decreases, the number of power module groups that need to be disconnected from charging terminal M1 is determined based on the reduced power demand of charging terminal M1. Then, based on the number of power module groups that need to be disconnected from charging terminal M1, each switch unit is controlled to prioritize disconnecting charging terminal M1 from its corresponding power module groups with lower power supply priorities. For example, if the number of power module groups that need to be disconnected from charging terminal M1 is two, each switch unit is controlled to prioritize disconnecting charging terminal M1 from power module groups P5 and P6.

[0112] In addition, when a power module group is released in the charging system, the present application can also determine whether there is a terminal to be optimized that does not meet the power demand among the charging terminals. If there is a terminal to be optimized that does not meet the power demand, the charging priority of each terminal to be optimized is determined according to the preset charging priority setting strategy, and the released power module group is allocated to each terminal to be optimized in descending order of charging priority, and each switch unit is controlled to connect the connection line between the newly allocated power module group and its corresponding terminal to be optimized until each terminal to be optimized meets the power demand. After all charging terminals have finished charging, all switch units are disconnected to release the power module group.

[0113] Please refer to Figure 7 , Figure 7 A schematic structural diagram of a control system provided by an embodiment of the present invention.

[0114] The control system is applied to any of the above-mentioned charging devices, including:

[0115] Power supply priority setting module 1, configured to set the power module group closest to the target terminal in connection position as the power module group with the highest power supply priority corresponding to the target terminal, and set the power module group farthest from the target terminal in connection position as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are arranged in a preset order; the target terminal is any charging terminal;

[0116] A power module group allocation module 2 is configured to determine a target power module group to be allocated to the target terminal from among the idle power module groups according to the power demand of the target terminal and its corresponding power supply priority;

[0117] The switch unit control module 3 is used to connect the target terminal with the target power module group by controlling the switch units in the charging device to provide the target terminal with the required electric energy.

[0118] For an introduction to the control system provided in this application, please refer to the embodiments of the above-mentioned control method, and this application will not go into details here.

[0119] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0120] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present 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 present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power distribution device, characterized in that: include: Multiple current input terminals; at least three groups of first switch units; at least three groups of second switch units; a first circuit, wherein a plurality of groups of the first switch units are sequentially connected to form a closed loop of the first circuit, adjacent first switch units are each provided with a first connection terminal, and each first connection terminal is connected to at least one of the current input terminals; a second circuit, wherein a plurality of groups of the second switch units are sequentially connected to form a closed loop of the second circuit, wherein adjacent second switch units are each provided with a second terminal, and the second terminal is connected to a first terminal corresponding thereto in structure; a current output terminal connected to the first terminal and the second terminal; wherein each terminal is connected to a charging power unit and a charging terminal; two distribution branches correspond to each charging terminal and charging power unit connected to different terminals; if the switch unit on one distribution branch fails, the other distribution branch is used; Correspondingly, it also includes: The third switch unit, the second terminal is connected to its structurally corresponding first terminal through the third switch unit, and each of the second terminals is connected to at least one of the current input terminals.

2. The power distribution device according to claim 1, wherein: The number of the first switch units is three.

3. The power distribution device according to claim 2, wherein: The number of the second switch units is three.

4. The power distribution device according to claim 3, wherein: The number of the third switch units is three groups, and each of the second wiring terminals is connected to its structurally corresponding first wiring terminal through a group of the third switch units.

5. The power distribution device according to any one of claims 1 to 4, characterized in that: Each of the first wiring terminals and each of the second wiring terminals is connected to one of the current output terminals.

6. A charging device, characterized in that: The power distribution device according to any one of claims 1 to 5, further comprising: A charging power unit is connected to the current input end.

7. A charging device, characterized in that: The charging device according to claim 6 further comprises: A charging terminal is connected to the current output end; wherein all charging power units corresponding to the current input end at the same terminal constitute the same power module group.

8. The charging device according to claim 7, wherein: The charging device further includes: A fourth switch unit, wherein the first terminal and the second terminal are both connected to the current output terminal through the fourth switch unit.

9. A control method, characterized in that: The charging device according to claim 7 or 8 comprises: The power module group closest to the target terminal in terms of connection position is used as the power module group with the highest power supply priority corresponding to the target terminal; wherein the target terminal is any charging terminal; The power module group farthest from the target terminal in terms of connection position is used as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are sorted according to a preset order; Determining, according to the power demand of the target terminal and its corresponding power supply priority, a target power module group to be allocated to the target terminal from the idle power module groups; By controlling the switch units in the charging device, the target terminal is connected to the target power module group to provide the target terminal with the required electrical energy.

10. A control system, characterized in that: The charging device according to claim 7 or 8 comprises: a power supply priority setting module, configured to set the power module group closest to the target terminal in connection position as the power module group with the highest power supply priority corresponding to the target terminal, and set the power module group farthest from the target terminal in connection position as the power module group with the lowest power supply priority corresponding to the target terminal; wherein the power supply priorities of the remaining power module groups are sorted in a preset order; the target terminal is any charging terminal; a power module group allocating module, configured to determine a target power module group to be allocated to the target terminal from the idle power module groups according to the power demand of the target terminal and its corresponding power supply priority; The switch unit control module is used to connect the target terminal with the target power module group by controlling the switch units in the charging device to provide the target terminal with the required electric energy.

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