Power distribution device and charging system

Abstract

The utility model discloses a power distribution device and a charging system, and relates to the technical field of charging. The device is applied to the charging system, the charging system comprises at least three power modules, and the device comprises at least one first switch unit and a second switch unit; the first switch unit comprises three groups of first nodes and three groups of first controllable switches, every two groups of first nodes are connected through one group of first controllable switches, each group of first nodes are respectively connected with each power module, and at least one group of first nodes is connected with the charging interface; at least two groups of first nodes in the first switch units are provided with first output buses, and at least one first output bus of each first switch unit is connected through a second switch unit. Therefore, the modularization and the expansibility of the power distribution unit are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a power distribution device and a charging system. BACKGROUND

[0002] In the charging system of an electric vehicle, the power distribution unit is one of the core components of the charging system, which is responsible for reasonably distributing the power output by each power conversion module to different charging terminals according to the demand. The design and performance of the power distribution unit will directly affect the operation efficiency, reliability and cost-effectiveness of the entire charging system.

[0003] With the change of the power level of charging piles, more and more charging piles have output power that increases in power by three power modules, such as a 240KW charging pile containing six 40KW power modules, a 360KW charging pile containing nine 40KW power modules, and so on.

[0004] However, the existing power distribution unit cannot meet the current changing needs of charging piles, and the modularity and expandability of the power distribution unit are poor, which cannot be compatible with the development of charging systems of various power segments. SUMMARY

[0005] The main purpose of the present application is to provide a power distribution device and a charging system to improve the modularity and expandability of the power distribution unit.

[0006] To achieve the above purpose, the present application provides a power distribution device applied to a charging system, wherein the charging system includes at least three power modules, and the device includes at least one first switching unit and a second switching unit.

[0007] The first switching unit includes three groups of first nodes and three groups of first controllable switches, each group of the first nodes is connected through a group of the first controllable switches between each other, each group of the first nodes is connected with each of the power modules, and at least one group of the first nodes is connected with the charging interface.

[0008] At least two groups of the first nodes in the first switching unit have a first output bus, and at least one first output bus of each of the first switching units is connected through the second switching unit.

[0009] Optionally, each group of the first nodes of the first switching unit has one first output bus, wherein at least one first output bus is connected with the charging interface; or, any two groups of the first nodes of the first switching unit have one first output bus, wherein at least one first output bus is connected with the charging interface.

[0010] Optionally, the second switch unit comprises a plurality of second controllable switches; the first output bus of each adjacent first switch unit is connected through a second controllable switch.

[0011] Optionally, the second switch unit comprises a plurality of second controllable switches; any first output bus of any first switch unit is connected with the corresponding first output bus of the rest of the first switch units through a second controllable switch.

[0012] Optionally, the second switch unit comprises a plurality of second controllable switches; the corresponding first output bus of each first switch unit is connected with each other through a second controllable switch.

[0013] Optionally, the first controllable switch is a relay, and the second controllable switch is a contactor.

[0014] Optionally, the device further comprises at least one third switch unit, the third switch unit comprising a second node and a third controllable switch; the second node is used to be connected with a power module, and the second node is connected with the second switch unit or the charging interface through the third controllable switch.

[0015] Optionally, the number of the second nodes in the third switch unit is 3, and the number of the third controllable switches is 3*N, wherein N is the total number of the first output buses and is a positive integer; each second node has a second output bus, and each second output bus is connected with each first output bus through a third controllable switch.

[0016] Optionally, the number of the second nodes in the third switch unit is 3, and the number of the third controllable switches is 2*N, wherein N is the total number of the first output buses and is a positive integer; each second node has a second output bus, and any two second nodes share one second output bus, and each second output bus is connected with each first output bus through a third controllable switch.

[0017] Optionally, the device further comprises a master control unit, a detection unit and a driving unit; one end of the detection unit is connected with the master control unit, and the other end of the detection unit is connected with the first switch unit, the second switch unit and the third switch unit respectively; the detection unit is used for acquiring state parameters of the first controllable switch, the second controllable switch and the third controllable switch, and outputting the state parameters to the master control unit; one end of the driving unit is connected with the master control unit, and the other end of the driving unit is connected with the first switch unit, the second switch unit and the third switch unit respectively; the driving unit is used for driving the first controllable switch, the second controllable switch and the third controllable switch in response to a driving signal; and the master control unit is used for receiving a scheduling instruction and the state parameters, and generating the driving signal based on the scheduling instruction and the state parameters, and outputting the driving signal to the driving unit.

[0018] The application further provides a charging system comprising the power distribution device, the controller, the at least three power modules and the at least one charging terminal as described above, the power distribution device being connected with the controller, the power modules and the charging terminals respectively; the controller is used for acquiring demand powers of the charging terminals, and generating a scheduling instruction according to a connection relationship of the first controllable switch, the second controllable switch and the third controllable switch in the power distribution device and the demand powers; and the power distribution device is used for controlling the first controllable switch, the second controllable switch and the third controllable switch to be opened or closed according to the scheduling instruction, so as to distribute output powers of the power modules to the charging terminals.

[0019] The power distribution device of the application, by designing three groups of first nodes and three groups of switches as a minimum unit, i.e. a first switch unit, and connecting one first switch unit with three power modules, when it is needed to expand charging terminals of various power levels, only a plurality of first switch units and a plurality of power modules need to be set, and each first switch unit can be connected through a second switch unit; thereby effectively improving the modularity and expansibility of the power distribution device, and meeting the changing needs of current charging piles. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a scene example of the power distribution device of the embodiment of the application;

[0021] Figure 2 is one of the schematic diagrams of the power distribution device of the embodiment of the application;

[0022] Figure 3 is a structural schematic diagram of a three-in-three-out first switch unit of one specific example of the application;

[0023] Figure 4 is a structural schematic diagram of a three-to-two first switch unit of one specific example of the present application;

[0024] Figure 5 is a schematic diagram of a 180KW / 240KW power distribution device of one specific example of the present application;

[0025] Figure 6 is a schematic diagram of a 360KW power distribution device of one specific example of the present application;

[0026] Figure 7 is a schematic diagram of a 480KW power distribution device of one specific example of the present application;

[0027] Figure 8 is a schematic diagram of a 360KW power distribution device of another specific example of the present application;

[0028] Figure 9 is a schematic diagram of a 600KW power distribution device of one specific example of the present application;

[0029] Figure 10 is a schematic diagram of a 720KW power distribution device of one specific example of the present application;

[0030] Figure 11 is a schematic diagram of a 960KW power distribution device of one specific example of the present application;

[0031] Figure 12 is a schematic diagram of a partial matrix and full matrix combined power distribution device of an embodiment of the present application;

[0032] Figure 13 is a schematic diagram of a partial matrix and full matrix combined power distribution device of one specific example of the present application;

[0033] Figure 14 is a schematic diagram of a partial matrix and full matrix combined power distribution device of another embodiment of the present application;

[0034] Figure 15 is a schematic diagram of a partial matrix and full matrix combined power distribution device of another specific example of the present application;

[0035] Figure 16 is a schematic diagram of a power distribution device of an embodiment of the present application;

[0036] Figure 17 is a flowchart of a power distribution method of an embodiment of the present application;

[0037] Figure 18 illustrates an entity structure schematic diagram of a controller;

[0038] In the figure, 110, power module; 120, charging terminal; 130, controller; 140, power distribution device; 1810, processor; 1820, communication interface; 1830, memory; 1840, communication bus.

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] With the enhancement of global environmental protection awareness and the adjustment of energy structure, electric vehicles (EV) as an important tool for reducing carbon emissions and promoting sustainable development are gradually becoming the mainstream choice of the automobile market. The popularity of electric vehicles not only depends on the performance improvement of the vehicle itself, but also cannot do without the support of an efficient, reliable and convenient charging infrastructure network. In the electric vehicle charging system, the power distribution unit (PDU, Power Distribution Unit) plays a crucial role, which is responsible for reasonably distributing the output power of each power module to each charging pile according to the demand, ensuring the operation efficiency and reliability of the charging system.

[0042] At present, one of the existing power distribution methods is a full-matrix distribution method, that is, any group of power input is connected to the charging gun through a group of switches; this method can meet the requirement of flexible power distribution, but the number of power switches required is large and the system cost is high.

[0043] In addition, there is also a charging device in the prior art, which includes two core units of power module and switch matrix, wherein the power module includes two power modules, and there is a parallel switch between the two power modules, which is the first level power distribution. The switch matrix as the second level power switch reduces the cost by reducing the number of power switches in the full matrix. This scheme reduces the system cost to a certain extent, but the flexibility of power distribution is also greatly reduced.

[0044] Finally, there is also a power distribution device in the prior art, which further reduces the cost and improves the flexibility of power distribution of the two-input two-output power distribution device, but the two-input two-output power distribution unit has limitations in adapting to the expansion of system power level.

[0045] With the change of charging pile power level, more and more charging piles output power increases in power of three power modules, for example, 240KW charging pile containing six 40KW power modules, 360KW charging pile containing nine 40KW power modules, and so on, 480KW, 600KW, 720KW, 840KW, 960KW, etc. However, the existing power distribution device module is poor in expansibility, which cannot be compatible with the development of the above-mentioned various power segments, affects the development efficiency, and cannot meet the changing needs of the power level of the charging pile in terms of cost, volume, flexibility, etc.

[0046] Based on this, the embodiment of the application provides a power distribution device, method and charging system, by designing a first switch unit of three-in and three-out as a minimum unit, so that various power levels of charging terminals can be efficiently expanded, the modularity and expansibility of the power distribution device are improved, and the cost of the power distribution device is significantly reduced, and the flexibility of power distribution is more optimal.

[0047] For the convenience of understanding, the embodiment of the present application provides a scene example of a power distribution device, which is applied in an application environment as shown in the figure. Figure 1 The scene example is a charging scene of an electric vehicle charging station, in which the charging system of the charging station can include a plurality of power modules 110, a plurality of charging terminals 120, a controller 130 and a power distribution device 140. The power distribution device 140 is connected with each power module 110, each charging terminal 120 and the controller 130 respectively.

[0048] In the present scene example, the power module 110 can be an AC / DC power conversion module, which is used to convert the alternating current input from the power grid into direct current. The power distribution device 140 is composed of a plurality of switch devices, such as contactors or relays. The power distribution device 140 can combine different power modules 110 in parallel to distribute the power output by each power module 110 to each charging terminal 120 according to the demand, and then output to the electric vehicle being charged.

[0049] Specifically, the power distribution device 140 includes a plurality of first switch units, each of which is connected with three power modules 110 and at least one charging terminal 120; the first switch unit is a minimum unit composed of three groups of first nodes and three groups of controllable switches, and optionally, the three groups of controllable switches can form a triangular connection structure or other connection structure with three connection points. In addition, the power distribution device 140 further includes a second switch unit, which is used to combine and connect each first switch unit, so that all power modules 110 can output direct current to any one charging terminal 120.

[0050] In this scenario example, if the power of a power module 110 is 40KW, then a first switching unit combined with three power modules 110 can output 120KW of power. When it is necessary to expand the 120KW charging terminal 120 to a 600KW charging terminal 120, it is only necessary to expand the first switching unit to 5 and the power module 110 to 15, thereby realizing the rapid switching of the power level of the charging terminal 120.

[0051] During application, the controller 130 can receive the charging request sent by the charging terminal 120, obtain the power demand of the charging terminal 120, and then determine the power module 110 to supply power to the charging terminal 120 according to the power demand of the charging terminal 120 and the connection structure of each first switch unit and second switch unit, and generate a scheduling command; furthermore, the controller 130 sends the scheduling command to the power distribution device 140, and the power distribution device 140 controls the corresponding controllable switch to close or open according to the scheduling command, so that the power allocated to the charging terminal 120 is the power demand.

[0052] Referring to the scenario examples of the power distribution device in the foregoing embodiments, the power distribution device of the present application embodiments will be described in detail below.

[0053] Figure 2 This is one of the schematic diagrams of a power distribution device according to an embodiment of this application. This power distribution device can be applied to a charging system as described above, and the charging system may include at least three power modules. Figure 2 As shown, the power distribution device may include at least one first switching unit, and the first switching units are connected to each other; the first switching unit includes three sets of first nodes and three sets of first controllable switches, each set of first nodes is connected to each other through a set of first controllable switches, each set of first nodes is connected to each power module, and at least one set of first nodes is connected to the charging interface; at least two sets of first nodes in the first switching unit have a first output bus, and at least one first output bus of each first switching unit is connected to each other through a second switching unit.

[0054] It should be noted that the power module has input and output ports. Therefore, a set of first nodes includes two first nodes: one connected to the input port of the power module, and the other connected to the output port. Similarly, two first controllable switches form a group, and each of the two first controllable switches is connected to one of the two first nodes in the group. Furthermore, the charging interface is used to connect to and supply power to a load. The charging interface can be connected to a charging gun (charging terminal) to charge the vehicle's battery; alternatively, the charging interface can be wired to the battery via its output terminals.

[0055] Next, a first switching unit is taken as an example to introduce the connection relationship between the first switching unit, the power module and the charging interface.

[0056] Specifically, one first switching unit corresponds to connecting three power modules, that is, the three power modules are combined in parallel. The first switching unit includes three groups of first nodes and three groups of first controllable switches. Each group of first nodes corresponds to connecting one power module. The specific connection mode is that one group of first nodes includes two first nodes. One first node is connected with the input port of the power module, and the other first node is connected with the output port of the power module.

[0057] The three groups of first controllable switches are connected with each group of first nodes in pairs. Taking one group of first controllable switches as an example, one group of first controllable switches includes two first controllable switches, which are connected with two groups of first nodes. One end of one first controllable switch is connected with one first node connected with the input port, and the other end of the first controllable switch is connected with the other first node connected with the input port. One end of the other first controllable switch is connected with one first node connected with the output port, and the other end of the first controllable switch is connected with the other first node connected with the output port.

[0058] In this embodiment, the first controllable switch can be a mechanical and electronic switch, such as a relay, a contactor, etc. The first controllable switch can also be a power electronic switch, such as a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), an IGBT (Insulated-Gate Bipolar Transistor), etc.

[0059] In this embodiment, the three power modules can be directly connected with one charging interface through their respective first nodes, that is, the output port of the power module is directly connected with one charging interface through the corresponding first node. The connection line is referred to as the first output bus.

[0060] Reference Figure 2 As an example, the charging system includes power module M1, power module M2 and power module M3, and also includes charging interface DC1, charging interface DC2 and charging interface DC3. The first switching unit includes three groups of first nodes, that is, six first nodes, which are first node 1, first node 2, first node 3, first node 4, first node 5 and first node 6. The first switching unit also includes three groups of first controllable switches, that is, six first controllable switches, which are K1, K2, K3, K4, K5 and K6.

[0061] The first node 1 is connected with the input port of the power module M1, and the first node 2 is connected with the output port of the power module M1; the first node 3 is connected with the input port of the power module M2, and the first node 4 is connected with the output port of the power module M2; the first node 5 is connected with the input port of the power module M3, and the first node 6 is connected with the output port of the power module M3. One end of K1 is connected with the first node 1, and the other end of K1 is connected with the first node 3; one end of K2 is connected with the first node 2, and the other end of K2 is connected with the first node 4; one end of K3 is connected with the first node 1, and the other end of K3 is connected with the first node 5; one end of K4 is connected with the first node 2, and the other end of K4 is connected with the first node 6; one end of K5 is connected with the first node 3, and the other end of K5 is connected with the first node 5; one end of K6 is connected with the first node 4, and the other end of K6 is connected with the first node 6. The power module M1 is connected with the charging interface DC1 through the first node 1 and the first node 2; the power module M2 is connected with the charging interface DC2 through the first node 3 and the first node 4; and the power module M3 is connected with the charging interface DC3 through the first node 5 and the first node 6.

[0062] In the embodiment, at least two groups of the first nodes among the three groups of the first nodes (or the corresponding three power modules) can have the first output bus. As an example, the three groups of the first nodes all have one first output bus, that is, one first switch unit corresponds to three first output buses, in a three-in-three-out form. As another example, any two groups of the first nodes among the three groups of the first nodes (or the corresponding three power modules) can have the first output bus, that is, one first switch unit corresponds to two first output buses, in a three-in-two-out form.

[0063] It can be understood that no matter how many first output buses one first switch unit corresponds to, as long as the three groups of controllable switches are all closed, the three power modules can all output power.

[0064] In addition, the three groups of the first nodes of one first switch unit can be connected with three charging interfaces through three first output buses respectively; or only any two first output buses can be connected with two charging interfaces respectively; or only any one first output bus can be connected with one charging interface. In short, the number and the connection position of the charging interfaces connected by one first switch unit can not be fixed, and can be set by the staff according to actual needs.

[0065] In the embodiment, the number of first switch units and the number of power modules of the power distribution device can be set according to actual needs. For example, if the rated power of one power module is 40KW, one first switch unit is taken as the minimum unit, one first switch unit can combine three power modules, and output 120KW of power. When a charging pile with a power segment of 960KW needs to be configured, 8 first switch units and 24 power modules can be set, and the 8 first switch units are connected to each other, so that one charging interface of the charging pile can output 960KW of power.

[0066] The connection mode of each first switch unit can be that any first output bus of each first switch unit is connected directly through one wire, as shown in FIG. 3. Figure 2 The connection mode of each first switch unit can also be that any first output bus of each first switch unit is connected through a second switch unit, and when all power modules corresponding to two first switch units need to be connected in parallel, only the second switch unit needs to be controlled. The connection mode of each first switch unit can also use other existing modes, which will not be described here.

[0067] Therefore, three power modules are combined through one first switch unit, and when the power segment of a charging interface needs to be expanded, the number of first switch units and the number of power modules can be increased by taking the first switch unit as the minimum unit, thereby improving the modularity of the power distribution device. The better the modularity of the power distribution device is, the stronger the expandability of the power distribution device is, and then various power levels of charging interfaces can be efficiently expanded.

[0068] In some embodiments, each group of first nodes of the first switch unit has one first output bus, and at least one first output bus is connected to the charging interface; or any two groups of first nodes of the first switch unit have one first output bus, and at least one first output bus is connected to the charging interface.

[0069] In the embodiment, the first switch unit can be in the three-in-three-out form or the three-in-two-out form.

[0070] The three-in-three-out form is that the three groups of first nodes of the first switch unit have one first output bus, that is, the first switch unit has three first output buses. Any number of first output buses of the three first output buses can be connected to the charging interface, for example, two first output buses are directly connected to two charging interfaces respectively.

[0071] It should be noted that the first output bus of the three groups of first nodes of the first switching unit can be understood as: the first output bus of the power module connected to the corresponding first node of the three groups of first nodes, that is, the three power modules each have a first output bus, and the first output bus of each of the three power modules is connected to the charging interface or directly outputs power; here it is described that the three groups of first nodes each have a first output bus only for the convenience of description and understanding. In addition, the first output bus refers to the output bus connected to the first node in the first switching unit. Subsequent references to the first output bus can refer to the explanation here.

[0072] Figure 3 is a structural diagram of a three-in-two-out first switching unit according to an embodiment of the present application. As an example, as shown in Figure 3 , the charging system includes power module M1, power module M2, and power module M3, and also includes charging interface DC1, charging interface DC2, and charging interface DC3. The first switching unit includes three groups of first nodes, wherein the first nodes connected to the output ports of the power modules are first node 1, first node 2, and first node 3, respectively; the first switching unit also includes three groups of first controllable switches, wherein the first controllable switches related to the output ports of the power modules are K1, K2, and K3, respectively. It should be noted that, in order to clearly show Figure 3 , only the first nodes and first controllable switches related to the output ports of the power modules are shown, and the input ports and output ports of the power modules are not shown.

[0073] Figure 3 In the above embodiment, first node 1, first node 2, and first node 3 each have a first output bus, and the three first output buses are connected to charging interface DC1, charging interface DC2, and charging interface DC3, respectively. When charging interface DC3 needs power module M2 and power module M3 to output power together, K3 between first node 2 and first node 3 can be closed, and K1 and K2 are disconnected.

[0074] The three-in-two-out form is specifically that any two groups of first nodes of the three groups of first nodes of the first switching unit each have a first output bus, that is, the first switching unit has two first output buses. Any number of first output buses of the two first output buses can be connected to the charging interface, for example, so that one first output bus is directly connected to one charging interface.

[0075] Figure 4 is a structural diagram of a three-in-two-out first switching unit according to an embodiment of the present application. As an example, as shown in Figure 4As shown, the charging system includes power modules M1, M2 and M3, and charging interfaces DC1 and DC2. The first switching unit includes three groups of first nodes, of which the first nodes connected with the output ports of the power modules are first node 1, first node 2 and first node 3 respectively; the first switching unit also includes three groups of first controllable switches, of which the first controllable switches related to the output ports of the power modules are K1, K2 and K3 respectively. It should be noted that, in order to clearly show, Figure 4 Only the first nodes and the first controllable switches related to the output ports of the power modules are shown, and the input ports and the output ports of the power modules are not shown.

[0076] Figure 4 In this embodiment, the first node 1 and the first node 2 each have a first output bus, and the two first output buses are connected with the charging interface DC1 and the charging interface DC2 respectively. When the charging interface DC1 needs the power modules M1 and M3 to output power together, K2 between the first node 1 and the first node 3 can be closed, and K1 and K3 are disconnected.

[0077] In the embodiments of the present application, the first switching unit with three inputs and three outputs and the first switching unit with three inputs and two outputs can be combined arbitrarily; only the first switching unit with three inputs and three outputs can be used, or only the first switching unit with three inputs and two outputs can be used, and the combination mode of the first switching unit is not limited in the embodiments of the present application.

[0078] The above is an introduction to the structure and connection relationship of the first switching unit, and the connection mode between the first switching units will be introduced in detail below.

[0079] In some embodiments, the second switching unit can include a plurality of second controllable switches, and the second controllable switches are used to connect the first output buses corresponding to the first switching units, so as to realize parallel connection of the groups of power modules and flexible distribution of the output power of the power modules.

[0080] Similarly, the second controllable switch can be a mechanical and electronic switch, such as a relay, a contactor, etc., and the second controllable switch can also be a power electronic switch, such as a MOSFET, an IGBT, etc.

[0081] Figure 5 is a schematic diagram of a 180KW / 240KW power distribution device which is a specific example of the present application. It should be noted that, in order to clearly show, Figure 5 Only the first nodes and the first controllable switches related to the output ports of the power modules are shown, and the input ports and the output ports of the power modules are not shown.

[0082] As Figure 5As shown, as an example, the charging system includes power modules M1, M2, M3, M4, M5 and M6 with a rated power of 40KW, and charging interfaces DC1, DC2, DC3 and DC4. Each first switch unit is in a three-in-two-out form.

[0083] Among them, the first node 1 connected with the power module M1, the first node 2 connected with the power module M2, the first node 4 connected with the power module M4, and the first node 5 connected with the power module M5 all have a first output bus, and each first output bus is connected with the charging interface DC1, the charging interface DC2, the charging interface DC3 and the charging interface DC4 respectively.

[0084] In addition, the second switch unit includes two second controllable switches, K7 and K8. Among them, one end of K7 is connected to the first output bus of the first node 1, and the other end of K7 is connected to the first output bus of the first node 4; one end of K8 is connected to the first output bus of the first node 2, and the other end of K8 is connected to the first output bus of the first node 5.

[0085] Figure 5 The power distribution device in the charging system shown in FIG. 1 is a typical 240KW power distribution device. If the charging interface DC3 currently needs 40KW of power, the power module M4 is first allocated to the charging interface DC3; if the demand power of the charging interface DC3 becomes 180KW, K4, K5, K6 and K7 can be closed, and the power module M4, the power module M5, the power module M6 and the power module M1 are allocated to the charging interface DC3. In this way, each power module can be flexibly allocated to each charging interface, and each charging interface can output a maximum power of 240KW.

[0086] When the first switch unit is more than two, each second controllable switch in the second switch unit can connect each first switch unit in multiple connection modes. The present application provides the following three modes, and in actual application, one of the three modes can be selected, or the three modes can be combined for use.

[0087] In some embodiments, the first connection mode is that the first output buses of adjacent first switch units are connected through a second controllable switch.

[0088] In the present embodiment, the first output buses of adjacent two first switch units can be connected in sequence through multiple second controllable switches, that is, the first output buses of adjacent two first switch units are connected through one second controllable switch.

[0089] The connection method between the first output buses of adjacent first switching units can be as follows: number each first node of the first switching unit, and connect the first output buses with the same number in adjacent first switching units through a second controllable switch. In some embodiments, the first nodes of the first switching units may not be numbered; it is sufficient to select any first output bus in the first switching unit and connect it to any output bus of the adjacent first switching unit. No specific limitation is made here.

[0090] Figure 6 This is a schematic diagram of a specific example of a 360kW power distribution device according to this application. It should be noted that, for clarity of illustration, Figure 6 Only the first node and the first controllable switch associated with the output port of each power module are shown, and the input ports and output ports of the power modules are not shown.

[0091] like Figure 6 As shown, as an example, Figure 6 The power distribution device in this device is a typical 360kW power distribution device, consisting of three sets of three-input, three-output first switch units and six second controllable switches. The first nodes connected to the output ports of the power modules in the three sets of first switch units are numbered as: first node 1, first node 2, and first node 3; the second switch units include six second controllable switches, namely: K4, K5, K6, K7, K8, and K9.

[0092] Figure 6 In this configuration, the first output bus corresponding to the first node 1 of each first switch unit is connected sequentially via K4 and K5; the first output bus corresponding to the first node 2 of each first switch unit is connected sequentially via K6 and K7; and the first output bus corresponding to the first node 3 of each first switch unit is connected sequentially via K8 and K9.

[0093] Once the charging process begins, each charging port is initially assigned a directly connected power module for power output. As the power demand of the charging port increases, power modules can be added sequentially based on the connection topology of the controllable switches to meet the required power. During the charging process, the number of power modules assigned to the charging port will also change according to the changing charging demand.

[0094] For example, charging interface DC1 first allocates power module M2. Then, as the charging demand changes, power modules M1 and M3 can be allocated sequentially, at which point K1-1 and K3-1 will be closed. If the power demand further increases, K6 can be closed to further allocate power module M5 to charging interface DC1.

[0095] Once charging interface DC2 enters the charging process, charging interface DC1 will disconnect K3-1 and exit power module M3. As the power demand of charging interface DC2 increases, K8 can be closed to activate power module M6. This process continues; by scheduling each of the first and second switching units, the power demand of any charging interface can be met.

[0096] The first sequential connection method can use fewer second controllable switches to connect all the first output buses, thereby increasing the number of power module calling paths for each charging interface, improving the flexibility of power module calling, and reducing costs.

[0097] In some implementations, the second connection method is as follows: any first output bus of any first switching unit is connected to the corresponding first output bus of the remaining first switching units through a second controllable switch.

[0098] In this embodiment, any first output bus of any first switch unit can be selected and connected to the first output bus corresponding to the other first switch units respectively, and the two first output buses are connected through a second controllable switch.

[0099] Specifically, each first node of the first switching unit can be numbered, and then any first output bus of any first switching unit can be connected to the first output bus of the other first switching units that has the same number. In some embodiments, the first nodes of the first switching units may not be numbered; it is sufficient to connect any first output bus of any first switching unit to any first output bus of the other first switching units. This is not specifically limited here.

[0100] Figure 7 This is a schematic diagram of a specific example of a 480kW power distribution device according to this application. It should be noted that, for clarity of illustration, Figure 7 Only the first node and the first controllable switch associated with the output port of each power module are shown, and the input ports and output ports of the power modules are not shown.

[0101] like Figure 7 As shown, as an example, Figure 7 The power distribution device in this system is a typical 480kW power distribution device, comprising four sets of three-input, three-output first switching units and nine second controllable switches. The first nodes connected to the power module output ports in the four sets of first switching units are numbered as: First Node 1, First Node 2, and First Node 3. The second switching units include nine second controllable switches, namely: K4, K5, K6, K7, K8, K9, K10, K11, and K12.

[0102] Figure 7 In the first group, the first switch unit numbered as the first node 1 corresponds to the first output bus, which is connected to the first output bus numbered as the first node 1 of the remaining three groups of first switch units through K4, K5 and K6 respectively; the first switch unit numbered as the first node 2 corresponds to the first output bus, which is connected to the first output bus numbered as the first node 2 of the remaining three groups of first switch units through K7, K8 and K9 respectively; and the first switch unit numbered as the fourth group corresponds to the first output bus of the first node 3, which is connected to the first output bus numbered as the first node 3 of the remaining three groups of first switch units through K10, K11 and K12 respectively.

[0103] After entering the charging process, the charging interface DC1 first allocates the power module M2, and then allocates the power module M1 and the power module M3 in sequence as the charging demand changes, at which time K1-1 and K3-1 are closed. If the demand power further increases, K7, K8 and K9 can be closed to further allocate the power module M5, the power module M8 and the power module M11 for the charging interface DC1. In this way, each charging interface can correspond to a calling path with multiple power modules.

[0104] From Figure 7 As can be seen from the above, the second connection mode is to connect each first output bus to the remaining first output buses at the same position through a second controllable switch. Compared with the first connection mode, the second connection mode uses the same number of second controllable switches and has the same number of power module calling paths. Therefore, the second connection mode can also use fewer second controllable switches to connect each first output bus and increase the number of power module calling paths corresponding to each charging interface, improve the flexibility of power module calling, and reduce costs.

[0105] In some embodiments, the third connection mode is that each first output bus corresponding to each first switch unit is connected to each other through a second controllable switch.

[0106] In this embodiment, each first output bus corresponding to each first switch unit can be connected to each other, and each two first output buses are connected through a second controllable switch.

[0107] Specifically, each first node of the first switch unit can be numbered, and each first output bus numbered the same in each first switch unit can be connected to each other. In some embodiments, the first nodes of the first switch unit can not be numbered, and only each first output bus in each first switch unit needs to be connected to each other, which is not limited here.

[0108] Figure 8This is a schematic diagram of another specific example of a 360kW power distribution device in this application. It should be noted that, for clarity of illustration, Figure 8 Only the first node and the first controllable switch associated with the output port of each power module are shown, and the input ports and output ports of the power modules are not shown.

[0109] like Figure 8 As shown, as an example, Figure 8 The power distribution device is a 360KW power distribution device, which includes three sets of three-input, three-output first switch units and nine second controllable switches. The first nodes connected to the output ports of the power modules in the three sets of first switch units are numbered as: first node 1, first node 2, and first node 3; the second switch units include nine second controllable switches, namely: K4, K5, K6, K7, K8, K9, K10, K11, and K12.

[0110] Figure 8 In this configuration, the first output bus corresponding to the first node 1 of each first switch unit is connected to each other via K4, K5, and K6 respectively; the first output bus corresponding to the first node 2 of each first switch unit is connected to each other via K7, K8, and K9 respectively; and the first output bus corresponding to the first node 3 of each first switch unit is connected to each other via K10, K11, and K12 respectively.

[0111] After entering the charging process, charging interface DC2 first allocates power module M3. Then, as the charging demand changes, power modules M1 and M2 can be allocated sequentially, at which point K3-1 and K2-1 will be closed. If the power demand increases further, K10 and K11, or K10 and K12, can be closed to further allocate power modules M6 and M9 to charging interface DC2.

[0112] from Figure 8 As can be seen, the third connection method requires more second controllable switches compared to the first two, but it also provides more power module calling paths for each charging interface. For example, closing K10 and K11 can allocate power module M9 to charging interface DC2, and similarly, closing K12 can also allocate power module M9 to charging interface DC2. This increased number of selectable calling paths effectively reduces the possibility of a single controllable switch failing to call its associated power module, thus further improving the reliability of the power distribution device.

[0113] The above respectively introduces three connection modes applied in 360KW power distribution device and 400KW power distribution device. In the embodiment of the application, the three connection modes can also be combined for use. The following three examples are used to introduce the combined use or optimized use of the three connection modes, and the structure of the power distribution device of other power segments.

[0114] Figure 9 is a schematic diagram of a 600KW power distribution device which is a specific example of the application. It should be noted that, in order to clearly show, Figure 9 only the first node and the first controllable switch related to the output port of each power module are shown, and the input port and the output port of the power module are not shown.

[0115] As shown in Figure 9 , as an example, the charging system includes 15 power modules with a rated power of 40KW and 10 charging interfaces; the power distribution device includes 5 groups of first switch units and second switch units with a three-in-three-out structure. Each charging interface can output a maximum power of 600KW.

[0116] Among them, the connection mode between the first output bus corresponding to the first node 1 in each first switch unit adopts an optimized form of the third connection mode, and on the basis that each first output bus at the same position is connected two by two through the second controllable switch, part of the second controllable switch is deleted, so the cost and the number of calling paths are between the first connection mode and the third connection mode.

[0117] Similarly, the connection mode between the first output bus corresponding to the first node 2 in each first switch unit, and the connection mode between the first output bus corresponding to the first node 3 in each first switch unit also adopts an optimized form of the third connection mode.

[0118] Figure 10 is a schematic diagram of a 720KW power distribution device which is a specific example of the application. It should be noted that, in order to clearly show, Figure 10 only the first node and the first controllable switch related to the output port of each power module are shown, and the input port and the output port of the power module are not shown.

[0119] As shown in Figure 10 , as an example, the charging system includes 18 power modules with a rated power of 40KW and 12 charging interfaces; the power distribution device includes 6 groups of first switch units and second switch units with a three-in-three-out structure. Each charging interface can output a maximum power of 720KW.

[0120] The connection mode between the first output bus corresponding to the first node 1 in each first switch unit adopts a first connection mode, that is, each first output bus at the same position is connected in turn through a second controllable switch.

[0121] The connection mode between the first output bus corresponding to the first node 2 in each first switch unit and the connection mode between the first output bus corresponding to the first node 3 in each first switch unit both adopt a second connection mode, that is, one first output bus is connected with the remaining first output buses at the same position through one second controllable switch respectively.

[0122] Figure 11 is a schematic diagram of a 960KW power distribution device of one specific example of the present application. It should be noted that, in order to clearly show, Figure 11 only the first node and the first controllable switch related to the output port of each power module are shown, and the input port and the output port of the power module are not shown.

[0123] As Figure 11 shown, as an example, the charging system includes 24 power modules with a rated power of 40KW and 16 charging interfaces; the power distribution device includes 8 groups of first switch units and second switch units with three inputs and three outputs. Each charging interface can output a maximum power of 960KW.

[0124] The connection mode between the first output bus corresponding to the first node 1 in each first switch unit, the connection mode between the first output bus corresponding to the first node 2 in each first switch unit, and the connection mode between the first output bus corresponding to the first node 3 in each first switch unit all adopt an optimized form of the third connection mode, that is, on the basis of each first output bus at the same position being connected two by two through a second controllable switch, some second controllable switches are deleted.

[0125] As can be known from the above example, the power distribution device of the embodiment of the present application can expand the power distribution device from 180KW to 960KW with one first switch unit as a basic unit, and according to this rule, it can also be expanded to a higher power segment. And each second controllable switch in the second switch unit can be combined and connected in any way, and the cost, the number of calling paths of different connection modes are different, and the staff can adopt a more suitable second controllable switch combination mode according to the actual demand, so that the power distribution device of the embodiment of the present application has higher flexibility, can realize that all power modules are connected in parallel with fewer second controllable switches, and thus each charging interface can output maximum power.

[0126] In some embodiments, the first controllable switch can be a relay, and the second controllable switch can be a contactor. It can be understood that each first controllable switch only needs to pass the current output by one power module, while the second controllable switch can need to pass the current output by multiple power modules; and the current capacity of the relay is smaller than that of the contactor, and the cost of the relay is lower than that of the contactor.

[0127] Therefore, in the embodiments of the present application, the first controllable switch adopts a relay, which not only meets the current capacity requirement, but also effectively reduces the cost; and the second controllable switch adopts a contactor, which meets the current capacity requirement, thereby further reducing the cost of the power distribution device.

[0128] In order to improve the efficiency of power distribution, the embodiments of the present application also provide a power distribution device combining a partial bias matrix (i.e. the switch matrix in the above embodiments) and a full matrix. The structure of the power distribution device will be described in detail below.

[0129] In some embodiments, the power distribution device can further include at least one third switch unit, the third switch unit including a second node and a third controllable switch; the second node being configured to be connected to a power module, and the second node being connected to the second switch unit or the charging interface through the third controllable switch.

[0130] In the present embodiment, the number of second nodes in the third switch unit can be set according to actual needs, for example, the number of second nodes in one third switch unit can be 2, 3 or 5, etc. In order to be used in cooperation with the first switch unit, the number of second nodes in the third switch unit of the present embodiment is preferably 3. In addition, one second node is connected to one power module, and the connection mode of the second node and the power module can refer to the connection mode of the first node and the power module, which will not be described here.

[0131] Further, the number of third switch units in the present embodiment can be set according to actual needs, which is not specifically limited here. Each second node can be connected to the second switch unit or the charging interface through multiple third controllable switches, and whether to be connected to the second switch unit or the charging interface can be determined by the staff according to the actual situation. The connection to the second switch unit and the connection to the charging interface do not affect the power distribution effect, only the actual wiring position is different, so any one of the wiring positions can be selected.

[0132] Figure 12 is a schematic diagram of the power distribution device combining the bias matrix and the full matrix according to the embodiments of the present application. As shown in Figure 12As shown, in some embodiments, the number of second nodes in the third switch unit is 3, and the number of third controllable switches is 3*N, where N is the total number of first output buses and is a positive integer; each second node has a second output bus, and each second output bus is connected to each first output bus through a third controllable switch.

[0133] It should be noted that the second output bus refers to the output bus of the power module connected to the second node in the third switch unit. In addition, the second output bus corresponding to each second node in the third switch unit can be connected to a charging interface or not.

[0134] The third controllable switch can be a mechanical electronic switch, such as a relay, a contactor, etc. The third controllable switch can also be a power electronic switch, such as a MOSFET, an IGBT, etc.

[0135] In this embodiment, a plurality of third switch units can be provided, and the third switch unit is a M*N full matrix switch unit, i.e., the number of third controllable switches is M*N. Wherein, the value of M is related to the number of second nodes in the third switch unit, if there are three second nodes in the third switch unit, then M=3; if there are two second nodes in the third switch unit, then M=2. Because each first output bus needs to be connected to each second output bus, the value of N is related to the number of the above first output buses, for example, if there are 6 first output buses, then N=6.

[0136] When performing power distribution, the first switch unit and the second switch unit can be controlled according to the demand power of the charging interface first, so that the power modules connected by the partial matrix are distributed first. After the power modules connected by the partial matrix are all distributed, it is detected again whether the demand power of the charging interface has been met. If yes, the power module is dispatched according to the distribution result; if not, the third switch unit can be controlled according to the demand power of the charging interface to supplement the distribution of the power modules connected by the full matrix, so as to meet the demand power of the charging interface.

[0137] By combining the local partial matrix and the full matrix, because the power modules connected by the full matrix can be distributed to any charging interface, the distribution rate of the power modules can be effectively improved in the stage of supplementary distribution. Although the number of controllable switches increases and the cost increases compared with the power distribution device of the foregoing embodiment, the power modules can be combined, and the number of controllable switches is reduced under the premise of providing enough power modules.

[0138] Figure 13This is a schematic diagram of a power distribution device combining partial and full matrix power distribution, as a specific example of this application. It should be noted that, for clarity of illustration, Figure 13 Only the first controllable switch associated with the output port of each power module is shown, and the first node of each first switch unit is not shown. The output port of each power module can be equivalent to the first node connected to the output port of each first switch unit. Similarly, the first output bus of each power module can be equivalent to the first output bus of each first node.

[0139] like Figure 13 As shown, as an example, Figure 13 The power distribution device shown is an improvement on the 360KW power distribution device in the example above. The original three sets of three-input three-output first switch units have been changed to two sets of three-input three-output first switch units plus one set of 3×6 third switch units.

[0140] The charging system still contains nine power modules, six of which are connected to two first switching units, and three of which are connected to three second nodes (not shown in the figure) of a third switching unit. In addition, the charging system includes six charging interfaces, each connected to the first output bus of its respective group of first nodes.

[0141] Figure 13 In the second switching unit, there are two second controllable switches, S7 and S8. One end of S7 is connected to the first output bus of power module 3, and the other end of S7 is connected to the first output bus of power module 5; one end of S8 is connected to the first output bus of power module 1, and the other end of S8 is connected to the first output bus of power module 4.

[0142] Furthermore, the first output bus of power module 3 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s9, s10, and s11, respectively; the first output bus of power module 1 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s12, s13, and s14, respectively; and the first output bus of power module 2 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s15, s16, and s17, respectively. The first output bus of power module 5 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s18, s19, and s20, respectively; the first output bus of power module 6 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s21, s22, and s23, respectively; and the first output bus of power module 4 is connected to the second output buses of power modules 7, 9, and 8 via third controllable switches s24, s25, and s26, respectively.

[0143] Taking the charging interface G4 as an example, after entering the charging process, the charging interface G4 first allocates the power module 6, and then allocates the power module 4 and the power module 5 in sequence as the charging demand changes, at which time s6 and s5 are closed. If the demand power further increases, s21, s22 and s23 can be closed to further allocate the power module 7, the power module 9 and the power module 8 for the charging interface G4.

[0144] Figure 14 is a schematic diagram of a partial matrix combined with a full matrix power distribution device according to another embodiment of the present application. As shown in Figure 14 In some embodiments, the number of second nodes in the third switch unit is 3, and the number of third controllable switches is 2*N, where N is the total number of first output buses and is a positive integer; each second node has a second output bus, and any two second nodes share a second output bus, and each second output bus is connected to each first output bus through a third controllable switch.

[0145] The difference between this embodiment and the above-mentioned embodiments is that: this embodiment combines any two second nodes and outputs as one second node, thereby reducing the number of third controllable switches, reducing the cost of the power distribution device while improving the efficiency of supplementary distribution. Therefore, the third switch unit includes M*N third controllable switches, where the value of M is 2 (i.e., two second nodes).

[0146] Figure 15 is a schematic diagram of a partial matrix combined with a full matrix power distribution device according to another specific example of the present application. It should be noted that, in order to clearly show Figure 15 only the first controllable switches related to the output ports of each power module are shown, and the first nodes of each first switch unit are not shown, and the output ports of each power module can be equivalent to the first nodes connected to the output ports of each first switch unit; similarly, the first output buses of each power module can be equivalent to the first output buses of each first node.

[0147] As shown in Figure 15 As an example, Figure 15 The power distribution device shown in

[0148] The charging system still comprises nine power modules, six of which are connected with two first switch units respectively, three of which are connected with the second node (not shown in the figure) of a third switch unit, and power module 8 and power module 9 are combined through a wire. In addition, the charging system comprises six charging interfaces, each of which is connected with the first output bus of each group of first nodes.

[0149] Figure 15 Compared with the power distribution device of Figure 13 The power distribution device of the embodiment of the present application reduces six third controllable switches, and the rest is the same, so the rest of the structure is not described here.

[0150] In this example, power module 1-power module 7 can each provide 40KW of power, and after power module 8 and power module 9 are combined, they can provide 80KW of power.

[0151] Still taking charging interface G4 as an example, after entering the charging process, charging interface G4 first allocates power module 6, and then allocates power module 4 and power module 5 in turn as the charging demand changes, at which time s6 and s5 are closed. If the power modules connected with the first switch unit are all allocated, and the power output to charging interface G4 still does not meet the demand power of charging interface G4, then the third controllable switches s17 and s18 can be controlled to perform supplementary allocation.

[0152] If the power output to charging interface G4 is still 80KW short of the demand power, then s18 can be controlled to be closed to supplementally allocate power module 8 and power module 9 to charging interface G4. If the power output to charging interface G4 is still 40KW short of the demand power, then s17 can be controlled to be closed to supplementally allocate power module 7 to charging interface G4.

[0153] If the power output to charging interface G4 and charging interface G6 is simultaneously 40KW short, then power module 7 can be supplementally allocated to charging interface G4, and power module 8 and power module 9 can be supplementally allocated to charging interface G6. Only power module 8 or power module 9 can be started to perform power output when power module scheduling is performed, or power module 8 and power module 9 can be simultaneously started to perform average power output.

[0154] The above is the structure introduction of the power distribution device combining the local partial matrix and the full matrix, and the structures of other units of the power distribution device are described in detail below.

[0155] Figure 16 is a schematic diagram two of the power distribution device of the embodiment of the present application. As Figure 16As shown, in some embodiments, the power distribution device can further include a master control unit, a detection unit, a driving unit, and in addition, a basic communication interface and an auxiliary power supply.

[0156] One end of the detection unit is connected with the master control unit, and the other end of the detection unit is connected with the first, second and third switch units respectively, and the detection unit is used to acquire the state parameters of the first, second and third controllable switches and output the state parameters to the master control unit.

[0157] One end of the driving unit is connected with the master control unit, and the other end of the driving unit is connected with the first, second and third switch units respectively, and the driving unit is used to drive the first, second and third controllable switches in response to the driving signal.

[0158] The master control unit is used to receive the scheduling instruction and the state parameter, and generate the driving signal based on the scheduling instruction and the state parameter, and output the driving signal to the driving unit.

[0159] In the embodiment, the master control unit can be a single-chip microcomputer, a microcontroller, or a complex programmable logic controller (PLC), etc. The master control unit is mainly used to control the closing or opening of each controllable switch by controlling the driving unit, so as to realize the scheduling of each power module according to the scheduling instruction sent by the upper controller, and realize the power distribution function.

[0160] Further, the detection unit can be composed of various detection devices, such as switch state detection devices, temperature detection devices, voltage detection devices, etc. These detection devices are arranged at each controllable switch (i.e. the first, second or third controllable switch) to monitor the state parameters (such as opening and closing state, temperature, voltage value, etc.) of the controllable switch.

[0161] The real-time monitoring of the opening and closing state of the controllable switch is to determine whether the controllable switch that needs to be closed is closed, or whether the controllable switch that needs to be disconnected is disconnected, so that the control result of the master control unit can be known. If a controllable switch does not close or disconnect according to the control instruction, it can be preliminarily judged that the controllable switch may have a fault, or the controllable switch connected therewith has a fault.

[0162] Real-time detection of the temperature of the controllable switch is to ensure the safety and reliability of the power distribution device. For example, it can prevent the controllable switch from overheating and being damaged. The controllable switch generates heat during operation, and if the heat dissipation is poor or the load is too large, it may cause the controllable switch to overheat. By monitoring the temperature, abnormal conditions of the controllable switch can be found in time and measures can be taken to avoid damage to the controllable switch or the risk of fire due to overheating. For another example, it can prolong the service life of the controllable switch. Long-term high-temperature state can accelerate the aging process of the controllable switch and reduce its service life. Therefore, by monitoring the temperature and taking cooling measures (such as adding heat sinks, fans, etc.) when necessary, the working life of the controllable switch can be effectively prolonged.

[0163] Real-time detection of the voltage values on both sides of the controllable switch is also to ensure the safety and reliability of the power distribution device. For example, fault diagnosis can be performed to determine which controllable switches have faults. By monitoring the voltage on both sides of the controllable switch, it can be found in time whether there are voltage abnormalities such as overvoltage, undervoltage or voltage fluctuation. These abnormalities may indicate that the controllable switch has a fault or is about to fail. For another example, the controllable switch can be protected. When the voltage of the controllable switch is detected to be out of the normal range, measures can be taken immediately, such as controlling the controllable switch to open to prevent further damage to the controllable switch.

[0164] The driving unit can be an existing driving circuit. The driving unit is connected to each controllable switch and is used to drive the controllable switch to open or close.

[0165] Before the charging system enters the charging process, the master control unit first receives the scheduling instruction sent by the upper controller. The master control unit then outputs a driving signal based on the scheduling instruction to control the driving unit to control each controllable switch and schedule each power module. During the charging process, the detection unit monitors the opening and closing state, temperature data, and voltage values on both sides of each controllable switch in real time and transmits these data to the master control unit and the upper controller in real time. The master control unit can adjust the scheduling path of the power module based on these data. For example, if there is an abnormality in a controllable switch connected to power module 1, the master control unit can disconnect the controllable switch and find other scheduling paths to call power module 1, thereby ensuring the safety and reliability of the power distribution device.

[0166] In this way, the master control unit controls the driving unit to schedule each power module. The detection unit monitors the state parameters of each controllable switch in real time and transmits the state parameters to the master control unit and the upper controller, so that the master control unit or the controller can determine the abnormal controllable switch and the operating state of each power module based on the state parameters, and can adjust the scheduling path of the power module, thereby ensuring the safety and reliability of the power distribution device.

[0167] On the basis of the above-mentioned embodiments, the power distribution method provided by the embodiments of the present application can be applied to the charging system, which can include any one of the power distribution apparatuses, the controller, the at least three power modules and the at least one charging interface as described above. In addition, the power distribution method can be executed by the master control unit of the power distribution apparatus.

[0168] Figure 17 is a flowchart of the power distribution method of the embodiments of the present application. As Figure 17 described, the power distribution method can include the following steps:

[0169] Step 1710: receiving the scheduling instruction issued by the controller and the state parameters sent by the detection unit in the power distribution apparatus.

[0170] Step 1720: controlling the driving unit of the power distribution apparatus based on the scheduling instruction and the state parameters, so as to distribute the output power of each power module to each charging interface by controlling the first controllable switch, the second controllable switch and the third controllable switch.

[0171] Among them, the scheduling instruction is used to indicate the called power module, that is, which power modules are called and called to which charging interface; the state parameter is used to represent the state of the first controllable switch, the second controllable switch and the third controllable switch. It should be noted that the state parameter can include the on-off state, temperature data, voltage value on both sides of the controllable switch, etc.

[0172] Specifically, the master control unit first receives the scheduling instruction sent by the upper controller; wherein the scheduling instruction can be generated by the upper controller according to the demand power of each charging interface, and the topology of the first switch unit, the second switch unit and the third switch unit.

[0173] The scheduling instruction can be a power module scheduling path for each charging interface, and the master control unit determines the controllable switch that needs to be closed based on the power module scheduling path, further generates a driving signal to control the driving unit, and then controls the closing and opening of each controllable switch on the scheduling path.

[0174] During the charging process, the detection unit monitors the on-off state, temperature data and voltage value on both sides of the switch of each controllable switch in real time, and transmits these data to the master control unit and the upper controller in real time; the master control unit can adjust the scheduling path of the power module according to these data, that is, adjust the on-off state of each controllable switch, so as to ensure the safety and reliability of the power distribution apparatus.

[0175] Therefore, by designing three sets of first nodes and three sets of switches as a minimum unit, namely the first switch unit, and connecting one first switch unit to three power modules, when it is necessary to expand the charging interface to various power levels, it is only necessary to set up multiple first switch units and multiple power modules and connect each first switch unit; thus, the modularity and scalability of the power distribution device are effectively improved, meeting the changing needs of current charging piles.

[0176] It should be noted that for details not disclosed in the power distribution method of this embodiment, please refer to the details disclosed in the embodiments of the power distribution device in this specification, which will not be repeated here.

[0177] Based on the above embodiments, this application also provides a controller. Figure 18 An example of a schematic diagram of the physical structure of a controller is shown, such as... Figure 18 As shown, the controller may include a processor 1810, a communication interface 1820, a memory 1830, and a communication bus 1840, wherein the processor 1810, the communication interface 1820, and the memory 1830 communicate with each other through the communication bus 1840. The processor 1810 can call logic instructions in the memory 1830 to execute a power distribution method, which includes: receiving scheduling instructions issued by the controller and status parameters sent by the detection unit in the power distribution device; wherein the scheduling instructions are used to indicate the opening or closing of the first controllable switch, the second controllable switch, and the third controllable switch in the power distribution device, and the status parameters are used to characterize the status of the first controllable switch, the second controllable switch, and the third controllable switch; and controlling the drive unit of the power distribution device based on the scheduling instructions and the status parameters to distribute the output power of each power module to each charging interface by controlling the first controllable switch, the second controllable switch, and the third controllable switch.

[0178] In addition, the logic instructions in the memory 1830 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0179] On the basis of the above-mentioned embodiments, in another aspect, the present application also provides a non-transitory computer readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the power distribution method provided by the above-mentioned methods, the method comprising: receiving a scheduling instruction issued by a controller and a state parameter sent by a detection unit in a power distribution device; wherein the scheduling instruction is used to indicate the opening or closing of the first controllable switch, the second controllable switch and the third controllable switch in the power distribution device, and the state parameter is used to represent the state of the first controllable switch, the second controllable switch and the third controllable switch; controlling the driving unit of the power distribution device based on the scheduling instruction and the state parameter, so as to distribute the output power of each power module to each charging interface by controlling the first controllable switch, the second controllable switch and the third controllable switch.

[0180] On the basis of the above-mentioned embodiments, the present application also provides a charging system, comprising a power distribution device, a controller, at least three power modules and at least one charging terminal as described in the above-mentioned embodiments, the power distribution device being connected with the controller, each power module and each charging terminal; the controller is used to obtain the demand power of each charging terminal, and generate a scheduling instruction according to the connection relationship of the first controllable switch, the second controllable switch and the third controllable switch in the power distribution device and each demand power; the power distribution device is used to control the opening or closing of the first controllable switch, the second controllable switch and the third controllable switch according to the scheduling instruction, so as to distribute the output power of each power module to each charging terminal.

[0181] In the present embodiment, the charging terminal can be a charging gun, or a terminal device with a charging gun, which can realize direct current fast charging in cooperation with a split type direct current charger host.

[0182] Specifically, the controller can be connected with each charging terminal and acquire the demand power of each charging terminal; the controller generates a scheduling instruction according to the demand power of each charging terminal and the topology structure of the first switch unit, the second switch unit and the third switch unit, and sends the scheduling instruction to the master control unit of the power distribution device.

[0183] The master control unit receives the scheduling instruction sent by the controller, and controls the driving unit based on the scheduling instruction, and further controls the closing and opening of each controllable switch on the scheduling path.

[0184] It should be noted that the details of the charging system not disclosed in the embodiment are described in the embodiment of the power distribution device, and will not be described here.

[0185] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Some or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. Those skilled in the art can understand and implement it without creative labor.

[0186] From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software product, which can be stored in a computer readable storage medium such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, server, or network device, etc.) execute the method described in each embodiment or some parts of the embodiment.

[0187] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power distribution apparatus, characterized by, The application is applied to a charging system, the charging system comprises at least three power modules, and the device comprises at least one first switch unit and a second switch unit; The first switch unit comprises three groups of first nodes and three groups of first controllable switches, each group of the first nodes is connected through a group of the first controllable switches, each group of the first nodes is connected with each power module, and at least one group of the first nodes is connected with a charging interface; At least two groups of the first nodes in the first switch unit have a first output bus, and at least one first output bus of each first switch unit is connected through the second switch unit.

2. The power distribution apparatus of claim 1, wherein, Each group of the first nodes of the first switch unit has one first output bus, wherein at least one first output bus is connected with the charging interface; or, Any two groups of the first nodes of the first switch unit have one first output bus, wherein at least one first output bus is connected with the charging interface.

3. The power distribution apparatus of claim 1, wherein, The second switch unit comprises a plurality of second controllable switches; The first output buses of adjacent first switch units are connected through a second controllable switch.

4. The power distribution apparatus of claim 1, wherein, The second switch unit comprises a plurality of second controllable switches; Any first output bus of any first switch unit is connected with the corresponding first output bus of the remaining first switch units through a second controllable switch.

5. The power distribution apparatus of claim 1, wherein, The second switch unit comprises a plurality of second controllable switches; The corresponding first output buses in each first switch unit are connected through a second controllable switch.

6. The power distribution apparatus of any of claims 3-5, wherein, The first controllable switch is a relay, and the second controllable switch is a contactor.

7. The power distribution apparatus of any of claims 3-5, wherein, The device further comprises at least one third switch unit, and the third switch unit comprises second nodes and third controllable switches; The second nodes are used to be connected with the power modules, and the second nodes are connected with the second switch unit or the charging interface through the third controllable switches.

8. The power distribution apparatus of claim 7, wherein, In the third switch unit, the number of the second nodes is 3, and the number of the third controllable switches is 3*N, wherein N is the total number of the first output buses and is a positive integer; Each second node has a second output bus, and each second output bus is connected with each first output bus through a third controllable switch.

9. The power distribution apparatus of claim 7, wherein, In the third switch unit, the number of the second nodes is 3, and the number of the third controllable switches is 2*N, wherein N is the total number of the first output buses and is a positive integer; Each second node has a second output bus, wherein any two second nodes share one second output bus, and each second output bus is connected with each first output bus through a third controllable switch.

10. The power distribution apparatus of claim 7, wherein, The device further comprises a master control unit, a detection unit and a driving unit; One end of the detection unit is connected with the master control unit, and the other end of the detection unit is connected with the first switch unit, the second switch unit and the third switch unit respectively, and the detection unit is used for acquiring state parameters of the first controllable switch, the second controllable switch and the third controllable switch, and outputting the state parameters to the master control unit; One end of the drive unit is connected with the master control unit, and the other end of the drive unit is connected with the first switch unit, the second switch unit and the third switch unit respectively, and the drive unit is used for driving the first controllable switch, the second controllable switch and the third controllable switch in response to a drive signal; The master control unit is used for receiving a scheduling instruction and the state parameters, and generating the drive signal based on the scheduling instruction and the state parameters, and outputting the drive signal to the drive unit.

11. A charging system, characterized by The power distribution device, the controller, at least three power modules and at least one charging terminal are connected with each other, and the power distribution device is as claimed in any one of claims 1-10; The controller is used for acquiring demand powers of the charging terminals, and generating a scheduling instruction according to a connection relationship of the first controllable switch, the second controllable switch and the third controllable switch in the power distribution device and the demand powers; The power distribution device is used for controlling opening or closing of the first controllable switch, the second controllable switch and the third controllable switch according to the scheduling instruction, so as to distribute output powers of the power modules to the charging terminals.

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