Power distribution devices, charging equipment, energy storage devices and charging systems

Abstract

This application provides a power distribution device, a charging device, an energy storage device, and a charging system. The power distribution device includes at least one power distribution unit, each power distribution unit including at least one power port, multiple load ports, at least one connection port, and a switch matrix. Each power port is used to connect to a power module in the charging device, and each load port is used to connect to a load. The switch matrix is ​​used to disconnect or connect any two of each power port, each load port, and each connection port. At least one power distribution unit of the power distribution device includes a first power distribution unit, and one connection port of the first power distribution unit is used to connect to the power distribution units of other charging devices. This application embodiment can flexibly adjust the output power of the load ports of the power distribution device to meet the charging power requirements of different loads.

Description

Technical Field

[0001] This application relates to the field of charging, and more specifically, to a power distribution device, a charging device, an energy storage device, and a charging system. Background Technology

[0002] With the rapid popularization of new energy vehicles, the application of electric vehicle charging equipment as a supporting facility is becoming increasingly widespread. In current practical applications, different electric vehicles generally require different charging power from their charging equipment. For example, as users' requirements for charging time increase, some electric vehicles are beginning to develop towards supercharging models, and correspondingly, the charging power required from charging equipment is also constantly increasing. For ordinary electric vehicles, the charging power required from charging equipment is relatively smaller.

[0003] However, the output power of existing charging equipment is relatively fixed and cannot flexibly meet the charging power requirements of different electric vehicles. Summary of the Invention

[0004] This application provides a power distribution device, as well as a charging device, an energy storage device, and a charging system including the power distribution device, which can flexibly adjust the output power of the load port of the power distribution device for connection with the load to meet the charging power requirements of different loads.

[0005] In a first aspect, a power distribution device is provided for use in a charging device, the charging device including a power module; the power distribution device includes at least one power distribution unit, each power distribution unit including at least one power port, multiple load ports, at least one connection port, and a switch matrix, each power port being used to connect to the power module, each load port being used to connect to a load, and any two of each power port, each load port, and each connection port being connected via the switch matrix; the switch matrix is ​​used to disconnect or connect the connection between any two of each power port, each load port, and each connection port; the at least one power distribution unit includes a first power distribution unit, one connection port of the first power distribution unit being used to connect to the power distribution units of other charging devices, so as to enable power transmission between the first power distribution unit and the power distribution units of other charging devices.

[0006] It is understood that when a power distribution device is applied to a charging device, at least one connection port of the first power distribution unit is connected to a power distribution unit in another charging device. The number of first power distribution units in the power distribution device can be one or more.

[0007] In this embodiment, when the power distribution device is applied to a charging device, the first power distribution unit in the power distribution device can transmit power to the power distribution units of other charging devices through a set connection port, thereby realizing power sharing between the power modules of different charging devices. Furthermore, in practical applications, the connection port of the first power distribution unit can transmit the power output by the power distribution units of other charging devices to the load port of the first power distribution unit, thereby flexibly adjusting the output power of the load port to meet the charging power requirements of different loads.

[0008] Furthermore, since the first power distribution unit in the power distribution device can flexibly adjust the output power of the load port using the provided connection port, the power module in the charging equipment to which the power distribution device belongs can be designed for low power. This helps reduce the design complexity of the charging equipment, lowers the production cost of the charging equipment, and also helps reduce the size of the charging equipment.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the power module includes an AC-DC converter, a DC-DC converter, and a DC bus; the AC-DC converter is connected to the input terminal of the DC-DC converter via the DC bus; the AC-DC converter is used to convert AC power into a first DC power and output it to the DC bus; the DC-DC converter is used to receive the first DC power via the DC bus, perform power conversion on the first DC power, and output it; the power port is used to connect to the output terminal of the DC-DC converter to receive a second DC power output by the DC-DC converter.

[0010] In the above technical solution, when the power distribution device is applied to a charging device, the first power distribution unit in the power distribution device can transmit power to the power distribution units of other charging devices through a set connection port, thereby realizing power sharing between AC-DC conversion devices in different charging devices. This is beneficial for flexibly adjusting the output power of the load port of the first power distribution unit, and also for realizing the low-power design of the AC-DC conversion device in the charging device, thereby reducing the design complexity of the AC-DC conversion device, reducing the production cost of the charging device, and reducing the size of the charging device.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the power distribution device further includes a power sharing bus; a connection port of the first power distribution unit is used to connect to the power distribution units of other charging devices via the power sharing bus; the power sharing bus is used to connect at least one of the photovoltaic device and the energy storage device to collect the DC power output from at least one of the energy storage device and the photovoltaic device, as well as the first power distribution unit and the power distribution units of the other charging devices.

[0012] In the above technical solution, when the power distribution device is applied to charging equipment, the connection port of the first power distribution unit can obtain the power output from the power distribution units of other charging equipment, as well as energy storage devices and / or photovoltaic devices, through the power sharing bus, and transmit the obtained power to the load port. This is more conducive to improving the output power of the load port to meet the charging power requirements of different loads, and can also improve the utilization rate of green resources such as photovoltaics and energy storage, providing more abundant electrical energy for the load.

[0013] Furthermore, if photovoltaic and energy storage are stacked on the DC bus in the power module, the DC-DC converter connected to the downstream of the DC bus will need to be designed with a higher power rating. However, in the embodiments of this application, the power output by the energy storage device and / or photovoltaic device is directly transmitted to the load port of the first power distribution unit through the connection port of the first power distribution unit. This is more conducive to the low-power design of the power module, especially to the low-power design of the DC-DC converter connected to the downstream of the DC bus in the power module. This reduces the overall design complexity of the power module, reduces the production cost of the charging equipment, and helps to reduce the size of the charging equipment.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, at least one power distribution unit further includes a second power distribution unit, wherein another connection port of the first power distribution unit is connected to a connection port of the second power distribution unit to enable power transmission between the first power distribution unit and the second power distribution unit.

[0015] Understandably, when the power distribution device is used in a charging device, none of the connection ports of the second power distribution unit are connected to the power distribution units of other charging devices.

[0016] In the above technical solution, when the power distribution device is applied to a charging device, the first power distribution unit can transmit power to other power distribution units of the charging device through its connection port, and it can also transmit power to the second power distribution unit included in its power distribution device through its connection port. Therefore, in practical applications, the connection port of the first power distribution unit can transmit the power output from the power distribution units of other charging devices, as well as the power output from the second power distribution unit in its power distribution device, to the load port. This allows for flexible adjustment of the output power of the load port of the first power distribution unit to meet the charging power requirements of different loads, and also improves the power utilization rate of the power module connected to the power distribution device.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, one connection port of the first power distribution unit is connected to another connection port of the first power distribution unit via a switch matrix; the switch matrix is ​​also used to disconnect or connect the connection between one connection port of the first power distribution unit and the other connection port of the first power distribution unit.

[0018] In the above technical solution, when the power distribution device is applied to a charging device, by connecting the two connection ports of the first power distribution unit through a switch matrix, power transmission can be achieved between the second power distribution unit connected to the two connection ports and the power distribution units of other charging devices. Therefore, even if the connection port of the second power distribution unit is not connected to the power distribution units of other charging devices, the connection port of the second power distribution unit can still receive power output from the power distribution units of other charging devices. Furthermore, the output power of the load port of the second power distribution unit can be flexibly adjusted to meet the charging power requirements of different loads, and the flexibility of the power distribution device in outputting power to the load is improved.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the switching matrix of each power distribution unit includes a first switching unit and a second switching unit; each power port is connected to each connection port through the first switching unit and the second switching unit, each power port is connected to each load port through the first switching unit, and each connection port is connected to each load port through the second switching unit.

[0020] In the above technical solution, by connecting each power port of the power distribution unit to each load port through the first switching unit, and connecting each connection port to each load port through the second switching unit, the power ports and connection ports of the power distribution unit can transmit power to the load ports independently, thereby improving the flexibility of the output power of each load port of the power distribution unit.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the switch matrix of each power distribution unit further includes a third switch unit; two of the multiple power supply ports of each power distribution unit are connected through the third switch unit, and / or two of the multiple connection ports of each power distribution unit are connected through the third switch unit.

[0022] In the above technical solution, by connecting two power ports and / or two connection ports in the power distribution unit through a third switching unit, one power interface can be connected to each connection port and each load port of the power distribution unit via each switch in the switch matrix connected to another power port, or one connection port can be connected to each power port and each load port of the power distribution unit via each switch in the switch matrix connected to another connection port. This improves the switch utilization rate in the switch matrix, reduces the number of switches required in the switch matrix, and thus reduces the size and cost of the power distribution device.

[0023] In a second aspect, a charging device is provided, comprising a power module and a power distribution device; the power distribution device includes at least one power distribution unit, each power distribution unit including at least one power port, multiple load ports, at least one connection port, and a switch matrix, each power port being connected to the power module, each load port being used to connect a load, and any two of each power port, each load port, and each connection port being connected via the switch matrix; the switch matrix is ​​used to disconnect or connect the connection between any two of each power port, each load port, and each connection port; at least one power distribution unit includes a first power distribution unit, one connection port of the first power distribution unit being used to connect to the power distribution units of other charging devices, so as to enable power transmission between the first power distribution unit and the power distribution units of other charging devices.

[0024] In conjunction with the second aspect, in some implementations of the second aspect, the power module includes an AC-DC converter, a DC-DC converter, and a DC bus; the AC-DC converter is connected to the input terminal of the DC-DC converter via the DC bus, and the output terminal of the DC-DC converter is connected to each power port; the AC-DC converter is used to convert AC power into a first DC power and output it to the DC bus; the DC-DC converter is used to receive the first DC power via the DC bus, convert the first DC power into a second DC power, and output it to each power port.

[0025] Thirdly, an energy storage device is provided, comprising multiple battery packs, a DC-DC converter, and a power distribution device. The power distribution device includes at least one power distribution unit, each power distribution unit including at least one power port, multiple load ports, at least one connection port, and a switch matrix. The battery packs are connected to each power port via the DC-DC converter, each load port is used to connect a load, and any two of each power port, each load port, and each connection port are connected via the switch matrix. The DC-DC converter is used to convert the DC power output from the battery packs into power and output it to each power port, or to convert the DC power output from each power port into power and output it to the battery pack. The switch matrix is ​​used to disconnect or connect any two of each power port, each load port, and each connection port. At least one power distribution unit includes a first power distribution unit, and one connection port of the first power distribution unit is used to connect to the power distribution unit of a charging device, so that power can be transferred between the first power distribution unit and the power distribution unit of the charging device.

[0026] It is understood that in the power distribution device of the energy storage device, at least one connection port of the first power distribution unit is connected to the power distribution unit in the charging device. The number of first power distribution units in the power distribution device of the energy storage device can be one or more.

[0027] In the above technical solution, the DC power output from the battery pack, after being converted by a DC-DC converter, can be directly transmitted to the electric vehicle through the load port in the power distribution device, thereby enabling the energy storage device to charge the electric vehicle independently. This improves the utilization rate of energy storage resources and helps reduce the amount of electricity received from the grid when using charging equipment to charge the electric vehicle, thus reducing the cost of charging the electric vehicle.

[0028] Furthermore, in the power distribution device of the energy storage device, the first power distribution unit can transmit power to the power distribution unit of the charging device through a set connection port to achieve power sharing between the energy storage device and the charging device. In practical applications, the connection port of the first power distribution unit can transmit the power output from the power distribution unit of the charging device to the load port of the first power distribution unit, thereby flexibly adjusting the output power of the load port to meet the charging power requirements of different loads.

[0029] Fourthly, a photovoltaic device is provided, comprising a photovoltaic module, a DC-DC converter, and a power distribution device; the power distribution device includes at least one power distribution unit, each power distribution unit including at least one power port, multiple load ports, at least one connection port, and a switch matrix; the photovoltaic module is connected to each power port via the DC-DC converter, each load port is used to connect a load, and any two of each power port, each load port, and each connection port are connected via the switch matrix; the DC-DC converter is used to convert the DC power output from the photovoltaic module into power and output it to each power port; the switch matrix is ​​used to disconnect or connect any two of each power port, each load port, and each connection port; at least one power distribution unit includes a first power distribution unit, and one connection port of the first power distribution unit is used to connect to the power distribution unit of a charging device, so that power can be transferred between the first power distribution unit and the power distribution unit of the charging device.

[0030] It is understood that in the power distribution device of a photovoltaic device, at least one connection port of the first power distribution unit is connected to the power distribution unit in the charging device. The number of first power distribution units in the power distribution device of the photovoltaic device can be one or more.

[0031] In the above technical solution, the DC power output from the photovoltaic modules, after being converted by a DC-DC converter, can be directly transmitted to the electric vehicle through the load port of the power distribution device, thus enabling the photovoltaic equipment to charge the electric vehicle independently. This improves the utilization rate of photovoltaic resources and helps reduce the amount of electricity received from the grid when using charging equipment to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0032] Furthermore, in the power distribution device of the photovoltaic equipment, the first power distribution unit can transmit power to the power distribution unit of the charging equipment through a set connection port to achieve power sharing between the photovoltaic equipment and the charging equipment. In practical applications, the connection port of the first power distribution unit can transmit the power output from the power distribution unit of the charging equipment to the load port of the first power distribution unit, thereby flexibly adjusting the output power of the load port to meet the charging power requirements of different loads.

[0033] Fifthly, a charging system is provided, comprising a plurality of charging devices; each charging device includes a power module and a power distribution device, the power distribution device including at least one power distribution unit, each power distribution unit including at least one power port, a plurality of load ports, at least one connection port, and a switch matrix; each power port is connected to the power module, each load port is used to connect a load, and any two of each power port, each load port, and each connection port are connected via the switch matrix; the switch matrix is ​​used to disconnect or connect the connection between any two of each power port, each load port, and each connection port; at least one power distribution unit of each charging device includes a first power distribution unit, and a connection port of the first power distribution unit of one charging device is connected to a connection port of the first power distribution unit of another charging device to enable power transfer between the first power distribution units of one charging device and the first power distribution units of another charging device.

[0034] In the above technical solution, the first power distribution unit of any charging device in the charging system can transmit power to the first power distribution units of other charging devices through a set connection port, thereby realizing power sharing among the power modules of different charging devices in the charging system. Furthermore, in practical applications, the connection port of the first power distribution unit of any charging device can transmit the power output from the first power distribution units of other charging devices to the load port, thereby flexibly adjusting the output power of the load port to meet the charging power requirements of different loads.

[0035] Furthermore, since the first power distribution unit of any charging device can flexibly adjust the output power of the load port using the provided connection port, the power module in any charging device can be designed for low power. This helps reduce the design complexity of the charging device, lowers the production cost of the charging device, and also helps reduce the size of the charging device.

[0036] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the power module includes an AC-DC converter, a DC-DC converter, and a DC bus; the AC-DC converter is connected to the input terminal of the DC-DC converter via the DC bus, and the output terminal of the DC-DC converter is connected to each power port; the AC-DC converter is used to convert AC power into a first DC power and output it to the DC bus; the DC-DC converter is used to receive the first DC power via the DC bus, convert the first DC power into a second DC power, and output it to each power port.

[0037] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the charging system further includes at least one of the energy storage device and the photovoltaic device, and multiple power sharing buses; at least one of the energy storage device and the photovoltaic device, and a connection port of each power distribution unit of each charging device are connected via a power sharing bus; a power bus is used to collect the direct current output from at least one of the energy storage device and the photovoltaic device, and each power distribution unit of each charging device.

[0038] It is understandable that, since each power distribution unit of each charging device in the charging system is connected to the power distribution units of other charging devices through a power sharing bus, each power distribution unit of each charging device in the charging system can be understood as the first power distribution unit.

[0039] In the above technical solution, the connection port of any power distribution unit of any charging device in the charging system can obtain power from the power distribution units of other charging devices, as well as the output power of energy storage devices and / or photovoltaic devices, through the power sharing bus, and transmit the obtained power to the load port of that power distribution unit. This is beneficial to improving the output power of the load port of that power distribution unit to meet the charging power requirements of different loads, and can also improve the utilization rate of green resources such as photovoltaics and energy storage, providing more abundant electrical energy for the load.

[0040] For details regarding the beneficial effects not covered in the second to fifth aspects, please refer to the beneficial effects described in the first aspect above; they will not be repeated here. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a charging system provided in an embodiment of this application.

[0042] Figure 2 and Figure 3 They are Figure 1 The diagram shows the structure of the charging system.

[0043] Figure 4 This is a schematic diagram of the structure of a power distribution device provided in an embodiment of this application.

[0044] Figure 5 This is a schematic diagram of a charging system provided in an embodiment of this application.

[0045] Figure 6 This is a schematic diagram of another charging system provided in an embodiment of this application.

[0046] Figure 7 This is a schematic diagram of the structure of a charging device provided in an embodiment of this application.

[0047] Figure 8 This is a schematic diagram of the structure of a charging device provided in an embodiment of this application.

[0048] Figure 9 This is a schematic diagram of another charging device provided in an embodiment of this application.

[0049] Figure 10 This is a schematic diagram of the structure of another charging device provided in the embodiments of this application.

[0050] Figures 11 to 14 These are schematic diagrams of the topology of a power distribution unit provided in the embodiments of this application.

[0051] Figure 15 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application.

[0052] Figure 16 This is a schematic diagram of the structure of a photovoltaic device provided in an embodiment of this application.

[0053] Figures 17 to 19 These are schematic diagrams of a charging system provided in the embodiments of this application. Detailed Implementation

[0054] To facilitate understanding of the embodiments of this application, the following points will be explained before introducing the embodiments of this application.

[0055] In the description of the embodiments of this application, "connection" can refer to electrical connection. Electrical connection can be understood as the transmission of signals between two electrical components through direct or indirect electrical connection. For example, the connection between A and B can be understood as A and B being directly electrically connected, or it can be understood as A and B being indirectly electrically connected through one or more other electrical components.

[0056] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two.

[0057] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0058] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0059] First, to facilitate understanding of the technical solutions provided in the embodiments of this application, the application scenarios applicable to the embodiments of this application will be introduced below.

[0060] Figure 1 An exemplary schematic diagram of a charging system 100 provided in an embodiment of this application is shown.

[0061] See Figure 1 The charging system 100 may include a charging device 10 and an electric vehicle 20. The charging device 10 can receive alternating current (AC) from an external power grid 200, convert it into stable direct current (DC), and then supply it to the electric vehicle 20 to charge it. Alternatively, the electric vehicle 20 can also output electrical energy back to the external power grid 200 via the charging device 10.

[0062] The charging device 10 may include a charging host 11, at least one charging terminal 12, and at least one charging gun 13; that is, the charging device 10 can be a split-type charging pile. The charging host 11 is connected to at least one charging terminal 12, and the at least one charging terminal 12 is connected to at least one charging gun 13. Each charging gun 13 is used to connect to the electric vehicle 20. In specific implementations, one charging terminal 12 may be connected to one or more charging guns 13.

[0063] The charging host 11 may include multiple power conversion devices, which can convert AC power from the external power grid 200 into stable DC power and then deliver it to the charging terminal 12. The charging terminal 12 can deliver this stable DC power to the electric vehicle 20 through the connected charging gun 13 to charge the electric vehicle 20.

[0064] The charging terminal 12 may include a housing, a human-machine interface, a charging control unit, and a metering and billing unit, and is used to exchange information, transmit energy, and perform metering and billing with the electric vehicle 20.

[0065] Electric vehicle 20 can be a means of transportation that is driven by electric power. Electric vehicle 20 can be a pure electric vehicle (battery electric vehicle, pure EV / battery EV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), or a plug-in hybrid electric vehicle (PHEV), etc.

[0066] Figure 2 and Figure 3An example is shown Figure 1 The diagram shows the connection structure of the charging system 100.

[0067] Combination Figure 2 and Figure 3 The charging host 11 may include a power module 111 and a power distribution device 112.

[0068] In some embodiments, see Figure 2 The power module 111 may include multiple alternating current-to-direct current (AC-DC) converters 1111. The input terminals of the multiple AC-DC converters 1111 are connected to the external power grid 200, and the output terminals of the multiple AC-DC converters 1111 are connected to the input terminal of the power distribution device 112. The output terminal of the power distribution device 112 is connected to the charging gun 13 through the charging terminal 12.

[0069] Multiple AC-DC converters 1111 receive AC power from the external power grid 200 and convert it into DC power suitable for the electric vehicle 20 before transmitting it to the power distribution device 112. The power distribution device 112 dynamically distributes the DC power output from the multiple AC-DC converters 1111 according to the actual charging power required by the electric vehicle 20, transmits the distributed charging power to the charging terminal 12, and further transmits it to the electric vehicle 20 through the charging gun 13 connected to the charging terminal 12 to charge the electric vehicle 20.

[0070] In other embodiments, the power module 111 may include multiple AC-DC converters 1111, multiple direct current-to-direct current (DC-DC) converters 1112, and a DC bus 1113. The input terminals of the multiple AC-DC converters 1111 are connected to the external power grid 200. The output terminals of the multiple AC-DC converters 1111 are connected to the input terminals of the multiple DC-DC converters 1112 via the DC bus 1113. The output terminals of the multiple DC-DC converters 1112 are connected to the input terminals of the power distribution device 112. The output terminal of the power distribution device 112 is connected to the charging gun 13 via the charging terminal 12.

[0071] Multiple AC-DC converters 1111 receive AC power from the external power grid 200 and convert it into DC power before transmitting it to the DC bus 1113. That is, the DC bus 1113 can collect the first DC power output from the multiple AC-DC converters 1111. Multiple DC-DC converters 1112 receive the DC power output from the multiple AC-DC converters 1111 via the DC bus 1113, further convert it into DC power suitable for the electric vehicle 20, and then transmit it to the power distribution device 112. The power distribution device 112 dynamically distributes the DC power output from the multiple DC-DC converters 1112 according to the actual charging power required by the electric vehicle 20, transmits the distributed charging power to the charging terminal 12, and further transmits it to the electric vehicle 20 through the charging gun 13 connected to the charging terminal 12 to charge the electric vehicle 20.

[0072] Figure 4 This is an example provided in the embodiments of this application and Figure 3 A schematic diagram of the structure of the power distribution device 112 connected to the multiple DC-DC converters 1112 shown.

[0073] See Figure 4 The power distribution device 112 includes multiple power distribution units 1121. Each power distribution unit 1121 includes an input terminal and multiple output terminals. The input terminal of each power distribution unit 1121 is connected to the multiple output terminals through a set of switching devices. The input terminals of the multiple power distribution units 1121 serve as multiple output terminals of the power distribution device 112, and are connected one-to-one with the output terminals of the multiple DC-DC converters 1112. One output terminal of each power distribution unit 1121 is connected to form multiple output terminals of the power distribution device 112, i.e., output terminal 1, output terminal 2... output terminal n. In a specific implementation, the multiple output terminals of the power distribution device 112 are connected one-to-one with multiple charging guns 13 for connection to the electric vehicle 20.

[0074] As described in the background section above, in current practical applications, different electric vehicles 20 generally require different charging power from the charging equipment 10. For example, for supercharging electric vehicles 20, the required charging power from the charging equipment 20 is relatively high, meaning the output power from the power distribution device 112 needs to be relatively high. Conversely, for ordinary electric vehicles 20, the required charging power from the charging equipment 20 is relatively low, meaning the output power from the power distribution device 112 needs to be relatively low.

[0075] Since the output power of the power distribution device 112 largely depends on the power of the power module 111, and the design of the power module 111 is currently relatively fixed, the output power of the power distribution device 112 is also relatively fixed. For example, to meet the high-power supercharging needs of electric vehicles 20 in supercharging models, the power module 111 is often designed for high power, and correspondingly, the output power of the power distribution device 112 is usually relatively large. If this high-power power module 111 is used directly to charge electric vehicles 20 in ordinary models through the power distribution device 112, it is easy to waste power resources. In addition, high-power power modules 111 are usually expensive to manufacture and large in size, which leads to limited installation space and insufficient installation flexibility in special scenarios such as parking lots. Alternatively, to meet the low-power charging needs of electric vehicles 20 in ordinary models, such as fast charging, the power module 111 is often designed for low power, and correspondingly, the output power of the power distribution device 112 is relatively small. If the low-power power module 111 is used directly to charge the electric vehicle 20 of the supercharging model through the power distribution device 112, it may not be able to meet the electric vehicle's need for high-power supercharging.

[0076] Therefore, how to flexibly meet the charging power requirements of different electric vehicles is an urgent problem to be solved.

[0077] Based on the above, embodiments of this application provide a power distribution device, as well as a charging device, an energy storage device, and a charging system including the power distribution device, which can flexibly adjust the output power of the load port of the power distribution device used to connect to the load to meet the charging power requirements of different loads.

[0078] The following description, in conjunction with the accompanying drawings, details the power distribution device, charging device, energy storage device, and charging system provided in the embodiments of this application.

[0079] Figure 5 This is a schematic diagram of the structure of a charging system 300 provided in an embodiment of this application.

[0080] See Figure 5 The charging system 300 may include multiple charging devices 400. Each charging device 400 includes a power module 410 and a power distribution device 420.

[0081] The power distribution device 420 includes at least one power distribution unit 421. Each power distribution unit 421 includes at least one power port 4211, at least one connection port 4213, multiple load ports 4214, and a switch matrix 4212. Each power port 4211 is connected to the power module 410, and each load port 4214 is used to connect a load. Any two of each power port 4211, each connection port 4213, and each load port 4214 in each power distribution unit 421 are connected via the switch matrix 4212. The switch matrix 4212 is used to disconnect or connect any two of each power port 4211, each connection port 4213, and each load port 4214.

[0082] It is understood that, in the embodiments of this application, the power module 410 is capable of providing the DC power required for charging, and the power module 410 may be, for example, the one described above. Figure 2 or Figure 3 The power module 111 is shown. The load can be, for example, the one described above. Figure 1 The electric vehicle 20 shown.

[0083] It is also understood that, in this embodiment, each connection port 4213 of the power distribution unit 421 can be used to connect to an external device other than its own power distribution unit 421 that can provide and receive DC power. For example, each connection port 4213 of the power distribution unit 421 can be used to connect to the connection port 4213 of the power distribution unit 421 in another charging device 400 other than its own charging device 400. Alternatively, each connection port 4213 of the power distribution unit 421 can also be used to connect to the connection port 4213 of other power distribution units 421 included in the power distribution device 420. Furthermore, each connection port 4213 of the power distribution unit 421 can receive DC power output from a connected external device or output DC power to a connected external device.

[0084] In a specific implementation, each power port 4211 of the power distribution unit 421 can be used to receive DC power output from the power module 410 and transmit the received DC power to each load port 4214 through the switch matrix 4212 to charge the load connected to the load port 4214, or transmit DC power to each connection port 4213 through the switch matrix 4212. Each connection port 4213 of the power distribution unit 421 can be used to output the DC power transmitted from the power port 4211 to a connected external device, or to receive DC power output from a connected external device and transmit the received DC power to each load port 4214 through the switch matrix 4212 to charge the load connected to the load port 4214.

[0085] Continue reading Figure 5 In each charging device 400 of the charging system 300, at least one power distribution unit 421 of the power distribution device 420 includes a first power distribution unit 421a. A connection port 4213 of the first power distribution unit 421a of one charging device 400 is connected to a connection port 421a of the first power distribution unit 421a of another charging device 400, so that power transfer can occur between the first power distribution units 421a of the two charging devices 400.

[0086] It is understood that, in this embodiment of the application, at least one connection port 4213 of the first power distribution unit 421a is connected to the power distribution unit of another charging device other than the one to which it belongs, the charging device 400. The number of first power distribution units 421a in the power distribution device 420 may be one or more.

[0087] In a specific implementation, in the charging system 300, the connection port 4213 of the first power distribution unit 421a of any charging device 400 is connected to the connection port 4213 of the first power distribution unit 421a of other charging devices 400, so that the first power distribution unit 421a of any charging device 400 can perform power transmission with the first power distribution unit 421a of other charging devices 400.

[0088] For example, with Figure 5 The charging system 300 shown includes two charging devices 400 (i.e., charging device 400a and charging device 400b). The power distribution device 420 of charging device 400a and charging device 400b respectively includes a first power distribution unit 421a. For example, the first power distribution unit 421a includes a connection port 4213. The connection port 4213 of the first power distribution unit 421a in charging device 400a is connected to the connection port 4213 of the first power distribution unit 421a in charging device 400b, so as to form a power sharing transmission line between the first power distribution unit 421a of charging device 400a and the first power distribution unit 421a of charging device 400b.

[0089] Therefore, the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b can transmit power through the power sharing transmission line, thereby realizing power sharing between the power module 410 connected to the first power distribution unit 421a of the charging device 400a and the power module 410 connected to the first power distribution unit 421a of the charging device 400b.

[0090] When a load port 4214 of the first power distribution unit 421a of the charging device 400a is connected to an electric vehicle, if the current output power of the load port 4214 is greater than or equal to the charging power demand of the electric vehicle, that is, if the power output of the power module 410 of the charging device 400a through the load port 4214 meets the charging power demand of the electric vehicle, the first power distribution unit 421a of the charging device 400a can choose to charge the electric vehicle in an independent operation mode.

[0091] If the current output power of the load port 4214 is less than the charging power required by the electric vehicle, that is, the power output by the power module 410 of the charging device 400a through the load port 4214 cannot meet the charging power required by the electric vehicle, then the first power distribution unit 421a of the charging device 400a can receive the DC power output by the first power distribution unit 421a of the charging device 400b through the connection port 4213, and transmit the received DC power to the load port 4214 to increase the output power of the load port 4214.

[0092] Specifically, the power output by the power module 410 of the charging device 400b can be transmitted through the connection port 4213 of the first power unit 421a in the charging device 400b to the connection port 4213 of the first power distribution unit 421a in the charging device 400a. Thus, the first power distribution unit 421a of the charging device 400a can not only transmit the power output by the power module 410 in its own charging device 400a to the load port 4214 connected to the electric vehicle through the switch matrix 4212, but also transmit the power output by the first power distribution unit 421a in the charging device 400b received at the connection port 4213 to the load port 4214 connected to the electric vehicle through the switch matrix 4212. In other words, the first power distribution unit 421a of the charging device 400a can simultaneously transmit the power output of the power module 410 of the charging device 400a and the power module 410 of the charging device 400b to the load port 4214 connected to the electric vehicle, thereby increasing the output power of the load port 4214 connected to the electric vehicle to meet the charging power requirements of the electric vehicle.

[0093] In the charging system 300 provided in this application embodiment, the first power distribution unit 421a of any charging device 400 can be connected to the connection port 4213 of the first power distribution unit 421a of other charging devices 400 through a provided connection port 4213. This allows power transmission between the first power distribution unit 421a of any charging device 400 and the connection port 4213 of the first power distribution unit 421a of other charging devices 400, thereby achieving power sharing among the power modules 410 of different charging devices 400. Furthermore, in practical applications, the connection port 4213 of the first power distribution unit 421a of any charging device 400 can transmit the power output by the first power distribution unit 421a of other charging devices 400 to the load port 4214, thereby flexibly adjusting the output power of the load port 4214 of the first power distribution unit 421a of any charging device 400 to meet the charging power requirements of different loads.

[0094] For example, when the charging system 300 is applied to a fully liquid-cooled supercharging station, the first power distribution unit 421a in any charging device 400 can transfer the power output from the connection ports 4213 of multiple other charging devices 400 to the load port 4214 through the set connection port 4213. This increases the power output from the load port 4214 to the electric vehicle, thereby meeting the demand for high-power supercharging of electric vehicles. This facilitates a charging speed of one kilometer per second, enabling electric vehicles to be charged enough energy to travel one kilometer in one second, providing users with a charging experience of "a cup of coffee, a fully charged start."

[0095] Understandably, when the charging system 300 is applied to a fully liquid-cooled supercharging station, the charging host, charging terminal, and charging gun in each charging device 400 of the charging system 300 are all cooled by liquid cooling, and the maximum output power of a single gun in each charging device 400 is greater than or equal to a preset power threshold. This preset power threshold can be, for example, 250kW.

[0096] Furthermore, since the first power distribution unit 421a of any charging device 400 in the charging system 300 can receive the power output by the first power distribution unit 421a of other charging devices 400 through the set connection port 4213, the power module 410 of each charging device 400 in the charging system 300 can be designed with low power.

[0097] In practical applications, when charging a low-power electric vehicle, the first power distribution unit 421a can transmit only the power output from the power module 410 in its own charging device 400 to the load port 4214, so that the output power of the load port 4214 meets the charging needs of the low-power electric vehicle. When charging a high-power electric vehicle, the first power distribution unit 421a can transmit the power output from the power module 410 in its own charging device 400, as well as the power output from the first power distribution unit 421a in other charging devices 400 received at the connection port 4213, to the load port 4214 together, thereby increasing the output power of the load port 4214, which is beneficial for meeting the charging needs of high-power electric vehicles, such as supercharging needs.

[0098] In the above technical solution, compared with designing the power module 410 as a high-power module, designing the power module 410 as a low-power module is more conducive to reducing the design complexity of the charging device 400, reducing the production cost of the charging device 400, and reducing the size of the charging device 400.

[0099] Figure 6 This is a schematic diagram of another charging system 300 provided in an embodiment of this application.

[0100] See Figure 6 In some embodiments, the power module 410 of each charging device 400 may include an AC-DC converter 411, a DC-DC converter 412, and a DC bus 413. The AC-DC converter 411 is connected to the input terminal of the DC-DC converter 412 via the DC bus 413, and the output terminal of the DC-DC converter 412 is connected to each power port 4211 of each power distribution unit 421 in the power distribution device 420. The AC-DC converter 411 converts alternating current into a first direct current and outputs it to the DC bus 413. The DC-DC converter 412 receives the first direct current through the DC bus 413, converts it into a second direct current, and outputs it to the connected power port 4211.

[0101] It is understood that the number of AC-DC converters 411 and DC-DC converters 412 can be one or more. In a specific implementation, each power port 4211 of each power distribution unit 421 in the power distribution device 420 can be connected to one DC-DC converter 412.

[0102] In other embodiments, the power module 410 of each charging device 400 may include only an AC-DC converter 411, and each power port 4211 of each power distribution unit 421 in the power distribution device 420 may be connected to an AC-DC converter 411.

[0103] For a detailed description of the AC-DC converter 411, DC-DC converter 412, and DC bus 413 in the power module 410, please refer to the above. Figure 2 and Figure 3 The embodiments shown are not described in detail here.

[0104] Continue reading Figure 6 In some embodiments, the charging system 300 may further include at least one of an energy storage device 500 and a photovoltaic device 600. The energy storage device 500 and the photovoltaic device 600 may be connected to a connection port 4213 of a power distribution unit 421 in any of the charging devices 400, so that the energy storage device 500 and the photovoltaic device 600 can respectively transmit power between themselves and the power distribution unit 421 of the connected charging device 400.

[0105] In practical implementation, the energy storage device 500 and the photovoltaic device 600 can be connected to the connection port 4213 of the power distribution unit 421 of the same charging device 400 in the charging system 300, or they can be connected to the connection port 4213 of the power distribution unit 421 of different charging devices 400 in the charging system 300.

[0106] For example, with Figure 6 The charging system 300 shown includes two charging devices 400 (i.e., charging device 400a and charging device 400b), an energy storage device 500, and a photovoltaic device 600. The power distribution devices 420 of charging devices 400a and 400b each include a first power distribution unit 421a. For example, the first power distribution unit 421a includes two connection ports 4213. One connection port 4213 of the first power distribution unit 421a in charging device 400a is connected to the other connection port 4213 of the first power distribution unit 421a in charging device 400b. Another connection port 4213 of the first power distribution unit 421a in the charging device 400a is connected to the energy storage device 500, and another connection port 4213 of the first power distribution unit 421a in the charging device 400b is connected to the photovoltaic device 600, so that three power-sharing transmission lines are formed between the first power distribution units 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b, between the first power distribution unit 421a of the charging device 400a and the energy storage device 500, and between the first power distribution unit 421a of the charging device 400b and the photovoltaic device 600.

[0107] Therefore, the first power distribution unit 421a of charging device 400a, the first power distribution unit 421a of charging device 400b, the energy storage device 500 and the photovoltaic device 600 can transmit power through the aforementioned power sharing transmission line, thereby realizing power sharing among the power module 410 connected to the first power distribution unit 421a of charging device 400a, the power module 410 connected to the first power distribution unit 421a of charging device 400b, the energy storage device 500 and the photovoltaic device 600.

[0108] When a load port 4214 of the first power distribution unit 421a of the charging device 400a is connected to an electric vehicle, if the current output power of the load port 4214 is less than the charging power required by the electric vehicle, the first power distribution unit 421a of the charging device 400a can either transmit the DC power output from the first power distribution unit 421a of the charging device 400b received at one connection port 4213 to the load port 4214, or transmit the DC power output from the energy storage device 500 received at another connection port 4213 to the load port 4214. This increases the output power of the load port 4214 to meet the charging power requirements of the electric vehicle.

[0109] Similarly, when a load port 4214 of the first power distribution unit 421a of the charging device 400b is connected to an electric vehicle, if the current output power of the load port 4214 is less than the charging power required by the electric vehicle, the first power distribution unit 421a of the charging device 400b can either transmit the DC power output by the first power distribution unit 421a of the charging device 400a received at one connection port 4213 to the load port 4214, or transmit the DC power output by the photovoltaic device 600 received at another connection port 4213 to the load port 4214. This increases the output power of the load port 4214 to meet the charging power requirements of the electric vehicle.

[0110] In the charging system 300 provided in this application embodiment, the connection port 4213 of the first power distribution unit 421a of any charging device 400 can transmit the power output from the power distribution unit 421 of other charging devices 400 to the load port 4213, and can also transmit the power output from the energy storage device 500 and / or the photovoltaic device 600 to the load port 4213. This not only allows for flexible adjustment of the output power of the load port 4214 of the power distribution unit 421 in any charging device 400 to meet the charging power requirements of different loads, but also improves the utilization rate of green resources such as photovoltaics and energy storage, providing more abundant electrical energy for the load.

[0111] Furthermore, if the energy storage device 500 and / or the photovoltaic device 600 are directly connected to the DC bus 413 of the power module 410, i.e., cascading photovoltaic and energy storage is performed on the DC bus 413 of the power module 410, the DC power collected by the DC bus 413 can be increased. This would increase the DC power received by the downstream DC-DC converter 412 through the DC bus, thereby increasing the output power of the DC-DC converter 412 through the load port 421. However, since the total rated output power of the DC-DC converter 412 in the power module 410 usually needs to be greater than the maximum power collected by the DC bus 413, in the above-mentioned method of increasing the output power of the load port 4214, as the DC power collected by the DC bus 413 increases, the DC-DC converter 412 in the power module 410 usually also needs to be designed with a larger power pool.

[0112] In this embodiment, by connecting the energy storage device 500 and / or the photovoltaic device 600 to the connection port 4213 of the power distribution unit 421 in the charging device 400, the power output by the energy storage device 500 and / or the photovoltaic device 600 can be directly transmitted to the load port 4214 of the power distribution unit 421 through the connection port 4213. This increases the output power of the load port 4214 and also facilitates the low-power design of the power module 410, particularly the DC-DC converter 412 within the power module 410. This reduces the overall design complexity of the power module 410, lowers the production cost of the charging device 400, and reduces its size.

[0113] The following description, using the charging device 400a in the charging system 300 as an example, further details the charging device 400 and the power distribution device 420 in the charging device 400 provided in this application embodiment. It should be understood that the following description of the charging device 400a applies to any charging device 400 in the charging system 300.

[0114] Figure 7 and Figure 8 These are schematic diagrams of the structure of a charging device 400a provided in the embodiments of this application.

[0115] Combination Figure 7 and Figure 8 The charging device 400a may include a power module 410 and a power distribution device 420.

[0116] The power distribution device 420 includes at least one power distribution unit 421. Each power distribution unit 421 includes at least one power port 4211, at least one connection port 4213, multiple load ports 4214, and a switch matrix 4212. Each power port 4211 is used to connect to a power module 410, and each load port 4214 is used to connect to a load. Any two of each power port 4211, each connection port 423, and each load port 424 are connected via the switch matrix 4212. The switch matrix 4212 is used to disconnect or connect the connection between any two of each power port 4211, each connection port 423, and each load port 424.

[0117] In this power distribution device 420, at least one power distribution unit 421 includes a first power distribution unit 421a. A connection port 4213 of the first power distribution unit 421a is used to connect to the power distribution units of other charging devices, for example, for connecting... Figure 5 A connection port 4213 of the first power distribution unit 421a in the charging device 400b shown is provided to enable power transmission between the first power distribution unit 421a and the power distribution units of other charging devices.

[0118] It is understood that the number of first power distribution units 421a in the power distribution device 420 can be one or more. Multiple first power distribution units 421a can be connected to each other through their respective connection ports 4213.

[0119] For example, in some embodiments, such as Figure 7 As shown, the power distribution device 420 of the charging device 400a includes a first power distribution unit 421a, which includes two connection ports 4213. Exemplarily, these two connection ports 4213 can be connected to... Figure 5 The two connection ports 4213 of the first power distribution unit 421a in the charging device 400b shown are connected one-to-one, thereby forming a power-sharing transmission line between the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b.

[0120] In other embodiments, such as Figure 8 As shown, the power distribution device 420 of the charging device 400a includes two first power distribution units 421a, each of which includes two connection ports 4213. Exemplarily, one connection port 4213 of each of the two first power distribution units 421a is connected to the other connection port 4213 of each of the two power distribution units 421a, and the other connection port 4213 of each of the two power distribution units 421a can be connected to... Figure 5The two connection ports 4213 of the first power distribution unit 421a in the charging device 400b shown are connected one-to-one, thereby forming a power-sharing transmission line between the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b.

[0121] Therefore, the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b can transmit power through the aforementioned power sharing transmission line, thereby realizing power sharing between the power module 410 connected to the first power distribution unit 421a of the charging device 400a and the power module 410 connected to the first power distribution unit 421a of the charging device 400b.

[0122] For a description of the power transfer between the first power distribution unit 421a of charging device 400a and the first power distribution unit 421a of charging device 400b, please refer to the above. Figure 5 and Figure 6 The embodiments shown are not described in detail here.

[0123] In the charging device 400a provided in this application embodiment, the first power distribution unit 421a of the power distribution device 420 can transmit power between the power distribution units of other charging devices through the provided connection port 4213, so as to realize power sharing between the power module 410 of the charging device 400a and the power modules of other charging devices. Furthermore, in practical applications, the connection port 4213 of the first power distribution unit 421a can transmit the power output by the power distribution unit in other charging devices to the load port 4214 of the first power distribution unit 421a, thereby flexibly adjusting the output power of the load port 4214 to meet the charging power requirements of different loads.

[0124] Furthermore, since the first power distribution unit 421a of the power distribution device 420 in the charging device 400a can flexibly adjust the output power of the load port 4214 using the provided connection port 4213, the power module 410 connected to the power distribution device 420 in the charging device 400a can be designed with low power, which helps to reduce the design complexity of the charging device 400a, reduce the production cost of the charging device 400a, and reduce the size of the charging device 400a.

[0125] Figure 9 This is a schematic diagram of another charging device 400a provided in an embodiment of this application.

[0126] See Figure 9 ,and Figure 7 and Figure 8In a different embodiment, in the charging device 400a, at least one power distribution unit 421 of the power distribution device 420 may include a first power distribution unit 421a and a second power distribution unit 421b. The first power distribution unit 421a may include multiple connection ports 4213, such as connection ports 4213a1 and 4213a2. The second power distribution unit 421b may include multiple connection ports 4213, such as connection port 4213b1 and connection port 4213b2.

[0127] A connection port 4213a1 of the first power distribution unit 421a is used to connect to the power distribution unit of other charging devices, for example, for connecting to Figure 6 The charging device 400b shown has a first power distribution unit 421a with a connection port 4213. Another connection port 4213a2 of the first power distribution unit 421a is connected to a connection port 4213b1 of the second power distribution unit 421b. Thus, the first power distribution unit 421a can transmit power to both other power distribution units of the charging device and the second power distribution unit 421b.

[0128] It is understood that, in this embodiment of the application, none of the connection ports 4213 of the second power distribution unit 421b are connected to the power distribution units of other charging devices other than the charging device 400a to which it belongs.

[0129] For example, each connection port 4213 in the second power distribution unit 421b can be connected to the connection ports 4213 of other power distribution units 421 included in the power distribution device 420; or, a portion of the connection ports 4213 of the second power distribution unit 421b can be connected to the connection ports 4213 of other power distribution units 421 included in the power distribution device 420, and another portion of the connection ports 4213 are used to connect energy storage devices and / or photovoltaic devices.

[0130] in, Figure 9 An exemplary diagram shows a connection port 4213b1 of the second power distribution unit 421b connected to another connection port 4213a2 of the first power distribution unit 421a. The other connection port 4213b2 of the second power distribution unit 421b is used to connect energy storage devices and photovoltaic devices, for example, for connecting... Figure 6 The energy storage device 500 and photovoltaic device 600 are shown.

[0131] In specific implementations, in some embodiments, the power distribution device 420 may further include at least one power sharing bus 422. Each connection port 4213 in the first power distribution unit 421a and the second power distribution unit 421b is connected to other devices via a power sharing bus 422.

[0132] For example, such as Figure 9 As shown, the power distribution device 420 includes three power sharing buses 422, namely power sharing buses 422a, 422b, and 422c. A connection port 4213a1 of the first power distribution unit 421a is connected to the power sharing bus 422a, and is connected to... Figure 6 The charging device 400b shown is connected to a connection port 4213 of the first power distribution unit 421a. Another connection port 4213a2 of the first power distribution unit 421a is connected to a connection port 4213b1 of the second power distribution unit 421b via a power sharing bus 422b. The other connection port 4213b2 of the second power distribution unit 421b is connected to... Figure 6 The energy storage device 500 and the photovoltaic device 600 shown are connected.

[0133] Therefore, the first power distribution unit 421a of charging device 400a can transmit power between itself and the first power distribution unit 421a of charging device 400b via the power sharing bus 422a, thereby achieving power sharing between the power module 410 of charging device 400a and the power module 410 of charging device 400b. Furthermore, the first power distribution unit 421a of charging device 400a can also transmit power between itself and the second power distribution unit 421b of charging device 400a via the power sharing bus 422b, thereby achieving power sharing between different power distribution units 421 within the same power distribution device 420.

[0134] Similarly, the second power distribution unit 421b of the charging device 400a can transmit power between the energy storage device 500 and the photovoltaic device 600 through the power sharing bus 422c, so as to realize power sharing between the power module 410, the energy storage device 500 and the photovoltaic device 600 connected to the second power distribution unit 421b of the charging device 400a.

[0135] When a load port 4214 of the first power distribution unit 421a in the charging device 400a is connected to an electric vehicle, if the current output power of the load port 4214 is less than the charging power required by the electric vehicle, the first power distribution unit 421a of the charging device 400a can not only transmit the power output by the first power distribution unit 421a of the charging device 400b received by one connection port 4213a1 to the load port 4214, but also transmit the power output by the second power distribution unit 421b received by another connection port 4213a2 to the load port 4214.

[0136] Therefore, it is possible to increase the output power of the load port 4214 to meet the charging power requirements of electric vehicles, and also to improve the utilization rate of the DC-DC converter 412 connected to the second power distribution unit 421b in the charging equipment 400a, thereby improving the overall utilization rate of the power module 410 in the charging equipment 400a.

[0137] Similarly, when a load port 4214 of the second power distribution unit 421b of the charging device 400a is connected to an electric vehicle, if the current output power of the load port 4214 is less than the charging power required by the electric vehicle, the second power distribution unit 421b can not only transmit the power output from the energy storage device 500 and the photovoltaic device 600 received from another connection port 4213b2 to the load port 4214, but also transmit the power output from the first power distribution unit 421a received from a connection port 4213b1 to the load port 4214.

[0138] Therefore, it is possible to increase the output power of the load port 4214 to meet the charging power requirements of electric vehicles, and also to improve the utilization rate of the DC-DC converter 412 connected to the first power distribution unit 421a in the charging equipment 400a, thereby improving the overall utilization rate of the power module 410 in the charging equipment 400a.

[0139] It is understood that the above embodiments are described with reference to a power distribution device 420 including a first power distribution unit 421a and a second power distribution unit 421b. In the embodiments of this application, the number of the first power distribution unit 421a and the second power distribution unit 421b in the power distribution device 420 may be one or more, and the number of connection ports 4213 in the first power distribution unit 421a and the second power distribution unit 421b may also be one or more.

[0140] In the charging device 400a provided in this application embodiment, the first power distribution unit 421a of the power distribution device 420 can transmit power to the power distribution units of other charging devices through the provided connection port 4213, and can also transmit power to the connection port 4213 of the second power distribution unit 421b in its own power distribution device 420 through the provided connection port 4213. Therefore, in practical applications, the connection port 4213 of the first power distribution unit 421a can transmit the power output from the power distribution units of other charging devices and the power output from the second power distribution unit 421b in its own power distribution device 420 to the load port 4214. This allows for flexible adjustment of the output power of the load port 4214 of the first power distribution unit 421a to meet the charging power requirements of different loads, and also improves the overall utilization rate of the power module 410 connected to the power distribution device 420.

[0141] Furthermore, in some examples, see further... Figure 9 When a connection port 4213a1 of the first power distribution unit 421a in the charging device 400a is connected to a connection port 4213 of the first power distribution unit 421a in the charging device 400b via a power sharing bus 422a, the power sharing bus 422a can also be used to connect energy storage devices and / or photovoltaic devices, for example, for connecting... Figure 6 The energy storage device 500 and photovoltaic device 600 are shown. The power sharing bus 422a can be used to collect the power output from the first power distribution unit 421a of the charging device 400a and the first power distribution unit 400b of the charging device 400b, as well as the power output from the energy storage device 500 and the photovoltaic device 600, thereby forming a large power pool on the power sharing bus 422a.

[0142] In practical applications, a connection port 4213a1 of the first power distribution unit 421a in the charging device 400a can obtain more power from the power sharing bus 422a and transmit the obtained power to the load port 4214 of the first power distribution unit 421a, thereby improving the output power of the load port 4214 of the first power distribution unit 421a and better meeting the charging power requirements of different loads.

[0143] Continue reading Figure 9In some embodiments, in the power distribution device 420 of the charging device 400a, when one connection port 4213a1 of the first power distribution unit 421a is used to connect to the power distribution unit of another charging device, and another connection port 4213a2 is connected to one connection port 4213b1 of the second power distribution unit 421b, the one connection port 4213a1 and the other connection port 4213a2 can also be connected through a switch matrix 4212. The switch matrix 4212 is used to disconnect or connect the connection between the one connection port 4213a1 and the other connection port 4213a2.

[0144] When the switch matrix 4212 connects the connection between one connection port 4213a1 and the other connection port 4213a2, power can also be transferred between the power distribution unit of another charging device connected to the one connection port 4213a1 and the second power distribution unit 421b connected to the other connection port 4213a2. Specifically, when the switch matrix 4212 connects the connection between the one connection port 4213a1 and the other connection port 4213a2, one connection port 4213a1 of the first power distribution unit 421a can transfer the power output by the first power distribution unit 421a of the charging device 400b to the other connection port 4213a2, and then through the other connection port 4213a2 to one connection port 4213b1 of the second power distribution unit 421b.

[0145] Therefore, one connection port 4213b1 of the second power distribution unit 421b can transmit the power output from the first power distribution unit 421a of the charging device 400a connected to the connection port 4213b1 to the load port 4214, and can also transmit the power output from the first power distribution unit 421a of the charging device 400b not connected to the connection port 4213b1 to the load port 4214. This is beneficial to increasing the output power of the load port 4214 of the second power distribution unit 421b, thereby improving the flexibility of the power distribution device 420 in distributing output power to the load, so as to better meet the charging power requirements of different loads.

[0146] Furthermore, in some examples, in the power distribution device 420 of the charging device 400a, any two connection ports 4213 of each power distribution unit 421 are connected by a switch matrix 4212 so that power transmission can be performed between any two connection ports 4213 of each power distribution unit 421.

[0147] The structure of the power distribution device 420 in the charging device 400a has been described above with reference to the accompanying drawings. The following will use... Figure 9Taking the first power distribution unit 421a in the charging device 400a shown as an example, the specific topology of the switch matrix 4212 in the power distribution unit 421 provided in this application embodiment is illustrated by way of example. It should be understood that the following description of the switch matrix 4212 in the first power distribution unit 421a applies to any power distribution unit 421 in any charging device 400 in the charging system 300.

[0148] Figure 10 This is a schematic diagram of the topology of a power distribution unit 421a provided in an embodiment of this application.

[0149] See Figure 10 The switch matrix 4212 of the first power distribution unit 421a may include a first switch unit (SU) 1 and a second switch unit SU2. The first switch unit SU1 includes a plurality of first switches, and the second switch unit SU2 includes a plurality of second switches.

[0150] In the first power distribution unit 421a, each power port 4211 is connected to each connection port 4213 through a first switching unit SU1, each power port 4211 is connected to each load port 4214 through a second switching unit SU2, and each connection port 4213 is connected to each load port 4214 through the first switching unit SU1 and the second switching unit SU2.

[0151] Specifically, taking the first power distribution unit 421a, which includes two power ports 4211 (i.e., power ports 4211a1 and 4211a2), two connection ports 4213 (i.e., connection ports 4213a1 and 4213a2), and two load ports 4214 (i.e., load ports 4213a1 and 4213a2), as an example, the first switching unit SU1 includes four first switches (i.e., first switches S11, S12, S13, and S14), and the second switching unit SU2 includes four second switches (i.e., second switches S21, S22, S23, and S24).

[0152] Specifically, power port 4211a1 is connected to connection port 4213a1 via first switch S11, and to load port 4214a1 via second switch S21, and so on. Connection port 4213a1 can be connected to load port 4214a1 via either first switch S11 or second switch S21, or via first switch S13 or second switch S23, and so on.

[0153] In addition, the connection port 4213a1 can be connected to the connection port 4213a2 via the first switch S12 or via the first switch S14.

[0154] In specific implementation, combined with Figure 9 and Figure 10 Taking the connection of the load port 4214a1 of the first power distribution unit 421a to an electric vehicle and its charging as an example, the second switches S21 and S23 are closed to establish connections between the power port 4211a1 and the load port 4214a1, and between the power port 4211a2 and the load port 4214a1. In this case, the power received by the power port 4211a1 from the power module 410 is transmitted to the load port 4214a1 via the second switch S21, and the power received by the power port 4211a2 from the power module 410 is transmitted to the load port 4214a1 via the second switch S23 to charge the electric vehicle.

[0155] If the output power transmitted from power ports 4211a1 and 4211a2 to load port 4214a1 is less than the charging power required by the electric vehicle, the first switch S11 is closed to establish the connection between connection port 4213a1 and load port 4214a1. In this case, the power output from the first power distribution unit 421a in the charging device 400b received by connection port 4213a1 can be transmitted to load port 4214a1 sequentially through the first switch S11 and the second switch S21, thereby increasing the output power of load port 4214a1 to meet the charging power required by the electric vehicle.

[0156] Figure 11 This is a schematic diagram of the topology of another example of a power distribution unit 421a provided in this application embodiment.

[0157] See Figure 11 ,and Figure 10 The difference between the illustrated embodiment and the one shown is that, in Figure 11 In the embodiment shown, the switch matrix 4212 of the first power distribution unit 421a includes a first switch unit SU1 and a second switch unit SU2, as well as a third switch unit SU3, which includes at least one third switch.

[0158] In the first power distribution unit 421a, two power ports 4211 among the multiple power ports 4211 can be connected by a third switching unit SU3, so that one of the two power ports 4211 can be switched to the other power port 4211 through the third switching unit SU3, thereby connecting each switch in the switch matrix 4212 connected to the other power port 4211 to each connection port 4213 and each load port 4214.

[0159] Specifically, continuing to take the first power distribution unit 421a, which includes power ports 4211a1 and 4211a2, connection ports 4213a1 and 4213a2, and load ports 4213a1 and 4213a2, as an example, the first switching unit SU1 includes two first switches (i.e., first switches S11 and S14), the second switching unit SU2 includes two second switches (i.e., second switches S21 and S22), and the third switching unit U3 includes one third switch (i.e., third switch S31).

[0160] Specifically, power port 4211a1 is connected to connection port 4213a1 via first switch S11 and to load port 4214a1 via second switch S21. Since power port 4211a2 is connected to power port 4211a1 via third switch S31, power port 4211a2 can be switched to power port 4211a1 via third switch S31, and then connected to connection port 4213a1 via first switch S11 connected to power port 4211a1, and to load port 4214a1 via second switch S21 connected to power port 4211a1, and so on.

[0161] Correspondingly, connection port 4213a1 can be connected to load port 4214a1 through first switch S11 and second switch S21, and connection port 4213a2 can be connected to load port 4214a1 through first switch S14, third switch S31 and second switch S21, and so on.

[0162] In specific implementation, combined with Figure 9 and Figure 11 Taking the connection between the load port 4214a1 of the first power distribution unit 421a and the electric vehicle, and charging the electric vehicle as an example, the second switch S21 and the third switch S31 are closed to establish the connection between the power port 4211a1 and the load port 4214a1, and between the power port 4211a2 and the load port 4214a1. In this case, the power received by the power port 4211a1 and the output power of the power module 410 are transmitted to the load port 4214a1 through the second switch S21, and the power received by the power port 4211a2 and the output power of the power module 410 are transmitted to the load port 4214a1 through the third switch S31 and the second switch S21 to charge the electric vehicle.

[0163] When the output power transmitted from power ports 4211a1 and 4211a2 to load port 4214a1 is less than the charging power required by the electric vehicle, the first switch S11 is closed to establish the connection between connection port 4213a1 and load port 4214a1. In this case, the power output from the first power distribution unit 421a in the charging device 400b received by connection port 4213a1 can be transmitted to load port 4214a1 sequentially through the first switch S11 and the second switch S21, thereby increasing the output power of load port 4214a1 to meet the charging power required by the electric vehicle.

[0164] It is understood that the above embodiments are described using the example of a first power distribution unit 421a including two power ports 4211. In some other embodiments, the first power distribution unit 421a may include three or more power ports 4211, and any two power ports 4211 can be connected to each other through a third switching unit SU3.

[0165] In this embodiment of the application, compared to Figure 10 In the illustrated embodiment, the first switch unit SU1 of the switch matrix 4212 includes four first switches, and the second switch unit SU2 includes four second switches. The above technical solution utilizes a third switch S31 to connect the power ports 4211a1 and 4211a2 of the first power distribution unit 421a. This allows for the connection of power ports 4211a1 and 4211a2 to each connection port 4213 and each load port 4214 of the first power distribution unit 421a while reducing the number of switches in the first switch unit SU1 and the second switch unit SU2. Furthermore, this improves the switch utilization rate in the switch matrix 4212, reduces the number of switches required in the switch matrix 4212, thereby reducing the size and cost of the first power distribution unit 421a.

[0166] Figure 12 This is a schematic diagram of the topology of another example of a power distribution unit 421 provided in this application embodiment.

[0167] See Figure 12 In some embodiments, the switch matrix 4212 of the first power distribution unit 421a may include a first switch unit SU1 and a second switch unit SU3, wherein the first switch unit SU1 includes a plurality of first switches and the second switch unit SU2 includes a plurality of second switches.

[0168] In the first power distribution unit 421a, each power port 4211 is connected to each connection port 4213 through a first switch unit SU1 and a second switch unit SU2, each power port 4211 is connected to each load port 4214 through the first switch unit SU1, and each connection port 4213 is connected to each load port 4214 through the second switch unit SU2.

[0169] Specifically, continuing with the example of the first power distribution unit 421a including two power ports 4211 (i.e., power ports 4211a1 and 4211a2), two connection ports 4213 (i.e., connection ports 4213a1 and 4213a2), and two load ports 4214 (i.e., load ports 4213a1 and 4213a2), the first switching unit SU1 includes four first switches (i.e., first switches S11, S12, S13, and S14), and the second switching unit SU2 includes four second switches (i.e., second switches S21, S22, S23, and S24).

[0170] Specifically, power port 4211a1 is connected to load port 4214a1 via first switch S11, connection port 4213a1 is connected to load port 4214a1 via second switch S21, and so on. Furthermore, power port 4211a1 can be connected to connection port 4213a1 via either first switch S11 or second switch S21, or via first switch S12 or second switch S22, and so on.

[0171] In addition, the connection port 4213a1 can be connected to the connection port 4213a2 through the second switch S21 and the second switch S23, or it can be connected to the connection port 4213a2 through the second switch S22 and the second switch S24.

[0172] In specific implementation, combined with Figure 9 and Figure 12 Taking the connection of the load port 4214a1 of the first power distribution unit 421a to the electric vehicle and its charging as an example, the first switches S11 and S13 are closed to establish connections between the power port 4211a1 and the load port 4214a1, and between the power port 4211a2 and the load port 4214a1. In this case, the power received by the power port 4211a1 and the output power of the power module 410 are transmitted to the load port 4214a1 through the first switch S11, and the power received by the power port 4211a2 and the output power of the power module 410 are transmitted to the load port 4214a1 through the first switch S13 to charge the electric vehicle.

[0173] When the output power transmitted from power ports 4211a1 and 4211a2 to load port 4214a1 is less than the charging power required by the electric vehicle, the second switch S21 is closed to establish the connection between connection port 4213a1 and load port 4214a1. In this case, the power output from the first power distribution unit 421a in the charging device 400b received by connection port 4213a1 can be transmitted to load port 4214a1 through the second switch S21, thereby increasing the output power of load port 4214a1 to meet the charging power required by the electric vehicle.

[0174] In this embodiment, each power port 4211 of the first power distribution unit 421a is connected to each load port 4214 via a first switching unit SU1, and each connection port 4213 is connected to each load port 4214 via a second switching unit SU2. Therefore, the connection port 4213 and the power port 4211 of the first power distribution unit 421a can transmit power to the load port 4214 independently.

[0175] For example, in one possible scenario, the connection port 4213a1 of the first power distribution unit 421a can transmit the power output from the power distribution units of other charging devices to the load port 4214a1, and the power ports 4211a1 and 4211a2 can transmit the power output from the power module 410 to the load port 4214a2. That is to say, the load port 4214a1 can output only the power shared by the power distribution units of other charging devices, thereby improving the flexibility of the output power of the load port 4214 of the first power distribution unit 421a.

[0176] Figure 13 This is a schematic diagram of the topology of another example of a power distribution unit 421 provided in this application embodiment.

[0177] See Figure 13 , continue with Figure 9 Taking the first power distribution unit 421a in the power distribution device 420 of the charging device 400a shown as an example, and... Figure 12 The difference between the illustrated embodiment and the one shown is that, in Figure 13 In the embodiment shown, the switch matrix 4212 of the first power distribution unit 421a includes a first switch unit SU1 and a second switch unit SU2, as well as a third switch unit SU3, which includes at least one third switch.

[0178] In the first power distribution unit 421a, two power ports 4211 out of a plurality of power ports 4211 can be connected via a third switching unit SU3, and / or two connection ports 4213 out of a plurality of connection ports 4213 in the first power distribution unit 421a can be connected via a third switching unit SU3. Thus, one power port 4211 can be switched to the other power port 4211 via the third switching unit SU3, thereby connecting each connection port 4213 and each load port 4214 using the switches in the switch matrix 4212 connected to the other power port 4211. Alternatively, one connection port 4213 can be switched to the other connection port 4213 via the third switching unit SU3, thereby connecting each power port 4211 and each load port 4214 using the switches in the switch matrix 4212 connected to the other connection port 4213.

[0179] Specifically, continuing to take the first power distribution unit 421a, which includes power ports 4211a1 and 4211a2, connection ports 4213a1 and 4213a2, and load ports 4213a1 and 4213a2, as an example, the first switching unit SU1 includes two first switches (i.e., first switches S11 and S12), the second switching unit SU2 includes two second switches (i.e., second switches S21 and S22), and the third switching unit U3 includes two third switches (i.e., third switches S31 and S32).

[0180] In this configuration, power port 4211a1 is connected to load port 4214a1 via a first switch S11, and connection port 4213a1 is connected to load port 4214a1 via a second switch S21. Since power port 4211a2 is connected to power port 4211a1 via a third switch S31, power port 4211a2 can be switched to power port 4211a1 via the third switch S31 and then connected to load port 4214a1 via the first switch S11 connected to power port 4211a1. Similarly, since connection port 4213a2 is connected to connection port 4213a1 via a third switch S32, connection port 4213a2 can be switched to connection port 4213a1 via the third switch S32 and then connected to load port 4214a1 via the second switch S21 connected to connection port 4213a2.

[0181] Correspondingly, the power port 4211a1 can be connected to the connection port 4213a1 through the first switch S11 and the second switch S21, and to the connection port 4213a2 through the first switch S11, the second switch S21 and the third switch S32, and so on.

[0182] In specific implementation, combined with Figure 9 and Figure 13 Taking the connection of the load port 4214a1 of the first power distribution unit 421a to the electric vehicle and its charging as an example, the first switch S11 and the third switch S31 are closed to establish connections between the power port 4211a1 and the load port 4214a1, and between the power port 4211a2 and the load port 4214a1. In this case, the power received by the power port 4211a1 and the output power of the power module 410 are transmitted to the load port 4214a1 through the first switch S11, and the power received by the power port 4211a2 and the output power of the power module 410 are transmitted to the load port 4214a1 through the third switch S31 and the first switch S11 to charge the electric vehicle.

[0183] When the output power transmitted from power ports 4211a1 and 4211a2 to load port 4214a1 is less than the charging power required by the electric vehicle, the second switch S21 is closed to establish the connection between connection port 4213a1 and load port 4214a1. In this case, the power output from the first power distribution unit 421a in the charging device 400b received by connection port 4213a1 can be transmitted to load port 4214a1 through the second switch S21, thereby increasing the output power of load port 4214a1 to meet the charging power required by the electric vehicle.

[0184] It is understood that the above embodiments are described using the example of a first power distribution unit 421a including two power ports 4211 and two connection ports 4213. In some other embodiments, the first power distribution unit 421a may include three or more power ports 4211, and any two power ports 4211 can be connected through a third switch unit SU3; or, the first power distribution unit 421a may include three or more connection ports 4213, and any two connection ports 4213 can also be connected through a third switch unit SU3.

[0185] In this embodiment of the application, compared to Figure 12In the illustrated embodiment, the first switch unit SU1 of the switch matrix 4212 includes four first switches, and the second switch unit SU2 includes four second switches. The above technical solution utilizes a third switch S31 to connect the power ports 4211a2 and 4211a2 of the first power distribution unit 421a, and a third switch S32 to connect the connection ports 4213a1 and 4213a2 of the first power distribution unit 421a. This allows for the connection of power ports 4211a1 and 4211a2 to each connection port 4213 and each load port 4214 of the first power distribution unit 421a while reducing the number of switches in the first switch unit SU1 and the second switch unit SU2. Furthermore, this improves the switch utilization rate in the switch matrix 4212, reduces the number of switches required in the switch matrix 4212, thereby reducing the size and cost of the first power distribution unit 421a.

[0186] The above description uses the charging device 400a in the charging system 300 as an example to introduce the charging device 400 provided in the embodiments of this application. The energy storage device 500 and photovoltaic device 600 in the charging system 300 will be further described in detail below with reference to the accompanying drawings.

[0187] Figure 14 This is a schematic diagram of the structure of an energy storage device 500 provided in an embodiment of this application.

[0188] See Figure 14 The energy storage device 500 may include a battery pack 510, a DC-DC converter 520, and a power distribution device 530. The power distribution device 530 includes at least one power distribution unit 531, and each power distribution unit 531 includes at least one power port 5311, at least one connection port 5313, multiple load ports 5314, and a switch matrix 5312.

[0189] In this configuration, the battery pack 510 is connected to each power port 5311 via a DC-DC converter 520, and each load port 5314 is used to connect a load. Any two of each power port 5311, each connection port 5213, and each load port 5314 in each power distribution unit 531 are connected via a switch matrix 5312. The switch matrix 5312 is used to disconnect or connect any two of each power port 5311, each connection port 5213, and each load port 5314.

[0190] The battery pack 510 can be used to store electrical energy or output electrical energy. The DC-DC converter 520 can be used to convert the DC power output from the battery pack 510 and output it to each power port 5311, or it can be used to convert the DC power output from each power port 5311 and output it to the battery pack 510 to charge the battery pack 510, also known as storing electrical energy. That is to say, the DC-DC converter 520 can be a bidirectional DC-DC converter.

[0191] It is understood that, in the embodiments of this application, the number of battery packs 510 and DC-DC converters 520 can be one or more, and multiple battery packs 510 can be connected in series and / or in parallel to the input terminals of one or more DC-DC converters 520. The output terminal of each DC-DC converter 520 can be connected to a DC-DC power port 5311.

[0192] It is also understood that, in the embodiments of this application, in the power distribution device 530, each connection port 5313 of the power distribution unit 531 can be used to connect an external device other than the power distribution unit 531 capable of providing and receiving DC power. For example, each connection port 5311 of the power distribution unit 531 can be used to connect to... Figure 7 The connection port 4211 of the power distribution unit 421 in the charging device 400a shown. Alternatively, each connection port 5311 of the power distribution unit 531 can be used to connect to the connection ports 5313 of other power distribution units 531 included in the power distribution device 530.

[0193] In a specific implementation, each power port 5313 of the power distribution unit 531 can be used to transmit the DC power output by the DC-DC converter 520 to each load port 5314 through the switch matrix 5312 to charge the load connected to the load port 5314, or to transmit the DC power to each connection port 5314 through the switch matrix 5312 to output DC power to the external device connected to each connection port 5314.

[0194] Each connection port 5314 of the power distribution unit 531 can be used to output DC power transmitted from the power port 5311 to the connected device, or to receive DC power output from the connected external device and transmit the received DC power to each load port 5314 through the switch matrix 5312 to charge the load connected to the load port 5314, or to transmit the received DC power to each power port 5311 through the switch matrix 5312 to charge the battery pack 510 through the DC-DC converter 520.

[0195] Continue reading Figure 14At least one power distribution unit 531 of the power distribution device 530 includes a first power distribution unit 531a, and a connection port 5313 of the first power distribution unit 531a is used to connect to the power distribution unit of the charging device, for example, for connecting to Figure 7 A connection port 4213 of the first power distribution unit 421a of the charging device 400a is provided to enable power transmission between the first power distribution unit 531a and the power distribution unit of the charging device.

[0196] It is understood that, in the embodiments of this application, at least one connection port 5313 of the first power distribution unit 531a is connected to the power distribution unit of the charging device. The number of first power distribution units 531a in the power distribution device 530 may be one or more.

[0197] It is also understood that, in the embodiments of this application, the number of connection ports 5313 of the power distribution unit for connecting the charging device in the first power distribution unit 531a can be one or more.

[0198] For example, with Figure 14 The power distribution device 530 of the energy storage device 500 shown includes a first power distribution unit 531a. For example, the first power distribution unit 531a includes two connection ports 5313. The two connection ports 5313 of the first power distribution unit 531a can be connected to… Figure 7 The two connection ports 4213 of the first power distribution unit 421a in the charging device 400a shown are connected one-to-one. Thus, power can be transferred between the first power distribution unit 531a in the energy storage device 500 and the first power distribution unit 421a in the charging device 400a, thereby realizing power sharing between the energy storage device 500 and the charging device 400a.

[0199] When a load port 5314 of the first power distribution unit 531a in the energy storage device 500 is connected to an electric vehicle, the first power distribution unit 531a can receive the DC power output by the first power distribution unit 421a of the charging device 400a through the set connection port 5314, and transmit the received DC power to the load port 5314 to flexibly adjust the output power of the load port 5314, thereby meeting the different charging power requirements of the electric vehicle.

[0200] For a detailed description of the power sharing between energy storage device 500 and charging device 400a, please refer to the relevant description of the power sharing between charging device 400a and charging device 400b mentioned above, which will not be repeated here.

[0201] For details regarding the power distribution device 530 in the energy storage device 500, please refer to the relevant description of the power distribution device 420 in the charging device 400a mentioned above, which will not be repeated here.

[0202] In the energy storage device 500 provided in this embodiment, the DC power output from the battery pack 510, after being output through the DC-DC converter 520, can be directly transmitted to the electric vehicle through the load port 5314 in the power distribution device 530, thereby enabling the energy storage device 500 to charge the electric vehicle independently. This improves the utilization rate of energy storage resources and helps reduce the amount of electricity received from the grid when using charging equipment to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0203] Furthermore, the first power distribution unit 531a of the power distribution device 530 can transmit power to the power distribution unit of the charging device through the provided connection port 5313, thereby realizing power sharing between the energy storage device 500 and the charging device. In practical applications, the connection port 5313 of the first power distribution unit 531a can transmit the power output from the power distribution unit in the charging device to the load port 5314, thereby flexibly adjusting the output power of the load port 5314 to meet the charging needs of different loads.

[0204] Figure 15 This is a structural schematic diagram of a photovoltaic device 600 provided in an embodiment of this application.

[0205] See Figure 15 The photovoltaic device 600 may include a photovoltaic module 610, a DC-DC converter 620, and a power distribution device 630. The power distribution device 630 includes at least one power distribution unit 631, and each power distribution unit 631 includes at least one power port 6311, at least one connection port 6313, multiple load ports 6314, and a switch matrix 6312.

[0206] In this configuration, the photovoltaic module 610 is connected to each power port 6311 via a DC-DC converter 620, and each load port 6314 is used to connect a load. Any two of the power ports 6311, 6313, and 6314 in each power distribution unit 631 are connected via a switch matrix 6312. The switch matrix 6312 is used to disconnect or connect any two of the power ports 6311, 6312, and 6314.

[0207] The photovoltaic module 610 can be used to convert light energy into electrical energy and output it to the DC-DC converter 620. The DC-DC converter 620 can be used to convert the DC power output from the photovoltaic module 610 into power and output it to each power port 6311.

[0208] It is understood that in the embodiments of this application, the number of photovoltaic modules 610 and DC-DC converters 620 can be one or more. The output terminal of each DC-DC converter 620 can be connected to a power port 6311.

[0209] It is also understood that, in the embodiments of this application, in the power distribution device 630, each connection port 6313 of the power distribution unit 631 can be used to connect to an external device other than the power distribution unit 631 that can provide and receive DC power. For a detailed description, please refer to the relevant description of the connection port 6313 in the energy storage device 500 above, which will not be repeated here.

[0210] In practical implementation, each power port 6313 of the power distribution unit 631 can be used to transmit the DC power output by the DC-DC converter 620 to each load port 6314 via the switch matrix 6312 to charge the load connected to the load port 6314, or to transmit the DC power to each connection port 6314 via the switch matrix 6312 to output DC power to the external device connected to each connection port 6314. Each connection port 6314 of the power distribution unit 631 can be used to receive the DC power output by the connected external device and transmit the received DC power to each load port 6314 via the switch matrix 6312 to charge the load connected to the load port 6314.

[0211] Continue reading Figure 15 At least one power distribution unit 631 of the power distribution device 630 includes a first power distribution unit 631a, and a connection port 6313 of the first power distribution unit 631a is used to connect to the power distribution unit of the charging device, for example, for connecting to Figure 7 A connection port 4213 of the first power distribution unit 421a of the charging device 400a is provided to enable power transmission between the first power distribution unit 631a and the power distribution unit of the charging device.

[0212] It is understood that, in the embodiments of this application, at least one connection port 6313 of the first power distribution unit 631a is connected to the power distribution unit of the charging device. The number of first power distribution units 631a in the power distribution device 630 may be one or more.

[0213] For example, with Figure 15The power distribution device 630 of the photovoltaic device 600 shown includes a first power distribution unit 631a. For example, the first power distribution unit 631a includes two connection ports 6313. The two connection ports 6313 of the first power distribution unit 631a can be connected to… Figure 7 The two connection ports 4213 of the first power distribution unit 421a in the charging device 400a shown are connected one-to-one. Therefore, power transmission can occur between the first power distribution unit 631a in the photovoltaic device 600 and the first power distribution unit 421a in the charging device 400a, thereby achieving power sharing between the photovoltaic device 600 and the charging device 400a.

[0214] When a load port 6314 of the first power distribution unit 631a in the photovoltaic device 600 is connected to an electric vehicle, the first power distribution unit 631a can receive the DC power output by the first power distribution unit 421a of the charging device 400a through the set connection port 6313, and transmit the received DC power to the load port 6314 to flexibly adjust the output power of the load port 6314, thereby meeting the different charging power requirements of the electric vehicle.

[0215] For a detailed description of the power sharing between photovoltaic device 600 and charging device 400a, please refer to the relevant description of the power sharing between charging device 400a and charging device 400b mentioned above, which will not be repeated here.

[0216] For details regarding the power distribution device 630 in the photovoltaic device 600, please refer to the relevant descriptions of the power distribution device 420 in the charging device 400 and the power distribution device 520 in the energy storage device 500, which will not be repeated here.

[0217] In the photovoltaic device 600 provided in this application embodiment, the DC power output by the photovoltaic module 610, after being output through the DC-DC converter 620, can be directly transmitted to the electric vehicle through the load port 6314 in the power distribution device 630, thereby enabling the photovoltaic device 600 to charge the electric vehicle independently. This can improve the utilization rate of photovoltaic green resources and help reduce the amount of electricity received from the grid when using charging equipment to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0218] Furthermore, the first power distribution unit 631a of the power distribution device 630 can transmit power to the power distribution unit of the charging device through the provided connection port 6313, thereby realizing power sharing between the photovoltaic device 600 and the charging device. In practical applications, the connection port 6313 of the first power distribution unit 631a can transmit the power output by the power distribution unit in the charging device to the load port 6314, thereby flexibly adjusting the output power of the load port 6314 to meet the charging needs of different loads.

[0219] The structures of the charging device 400, energy storage device 500, and photovoltaic device 600 in the charging system 300 provided in this application embodiment have been further described in detail above with reference to the accompanying drawings. The following provides illustrative examples of different connection methods for the connection ports of the power distribution devices in each device of the charging system 300.

[0220] Figure 16 This is a schematic diagram of the structure of a charging system 300 provided in an embodiment of this application.

[0221] See Figure 16 The charging system 300 includes multiple charging devices 400 and a power sharing bus 310. A connection port 4213 of each power distribution unit 421 in each charging device 400 is connected to the power bus 310. The power sharing bus 310 can be used to collect the power output from each power distribution unit 421 of each charging device 400 in the charging system 300, thereby forming a large power pool on the power sharing bus 310.

[0222] It is understood that since each power distribution unit 421 in each charging device 400 is connected to the power distribution unit 421 of other charging devices 400 in the charging system 300 through the power sharing bus 310, each power distribution unit in each charging device 400 can be the first power distribution unit 421a described above.

[0223] In some embodiments, to facilitate the connection of power distribution units 421 of each charging device 400 in the charging system 300 via a power sharing bus 310, the number of connection ports 4213 of each power distribution unit 421 in each charging device 400 of the charging system 300 may be equal, and the number of power sharing buses 310 may be equal to the number of connection ports 4213 of each power distribution unit 421.

[0224] In practical implementation, the connection port 4213 of any power distribution unit 421 in any charging device 400 can obtain the power output from the connection ports 4213 of all other power distribution units 421 included in the charging system 300 through the power sharing bus 310. Furthermore, the connection port 4213 of any power distribution unit 421 can transmit the obtained power to the load port 4214 of that power distribution unit 421, thereby further improving the output power of the load port 4214 of that power distribution unit 421, and better meeting the charging power requirements of different loads.

[0225] For example, with Figure 16 The charging system 300 shown includes two charging devices 400. Each charging device 400 has a power distribution device 420 including two power distribution units 421. Each power distribution unit 421 includes two connection ports 4213 and two load ports 4214. For example, if the charging system 300 includes charging devices 400a and 400b, and the power distribution device 420 of charging device 400a includes power distribution units 421#1 and 421#2, and power distribution unit 421#1 includes connection port 4213#1... For example, power distribution unit 421#2 includes connection ports 4213#3 and 4213#4. Power distribution device 420 of charging device 400b includes power distribution units 421#3 and 421#4. Power distribution unit 421#3 includes connection ports 4213#5 and 4213#6. Power distribution unit 421#4 includes connection ports 4213#7 and 4213#8. For example, charging system 300 may include two power sharing buses 310, namely power sharing buses 310a and 310b.

[0226] Specifically, connection ports 4213#1, 4213#3, 4213#5, and 4213#7 are connected to the power sharing bus 310a, while connection ports 4213#2, 4213#4, 4213#6, and 4213#8 are connected to the power sharing bus 310b. Thus, two power sharing transmission lines are formed in the charging system 300 via power sharing buses 310a and 310b. Any power distribution unit 421 in charging device 400a and charging device 400b can obtain the power output from all other power distribution units 421 in charging device 400a and charging device 400b through either of the aforementioned power sharing transmission lines.

[0227] In one possible application scenario, when a load port 4214 of the power distribution unit 421#1 in the charging device 400a is connected to an electric vehicle, if the current output power of the load port 4214 is less than the charging power required by the electric vehicle, the connection port 4213#1 of the power distribution unit 421#1 can obtain the power output by the power distribution units 421#2 to 421#4 through the power sharing bus 310a, and transmit the obtained power to the load port 4214, thereby helping to meet the charging power required by the electric vehicle.

[0228] In another possible application scenario, when the two load ports 4214 of the power distribution unit 421#1 in the charging device 400a are connected to two electric vehicles respectively, if the charging device 400b is not charging the electric vehicles, that is, the power distribution units 421#3 and 421#4 in the charging device 400b are in an idle state, the connection port 4213#1 of the power distribution unit 421#1 can obtain the power output by the power distribution units 421#3 and 421#4 through the power sharing bus 310a, and transmit the obtained power to the two load ports 4214.

[0229] In the charging system 300 provided in this application embodiment, by sharing the power of the power distribution units 421#3 and 421#4 in the charging device 400b that are in an idle state with the power distribution unit 421#1 of the charging device 400a, it is not only beneficial to ensure that the output power of the load port 4214 of the power distribution unit 421#1 meets the charging power demand of the electric vehicle, but also beneficial to improve the utilization rate of power resources in the charging device 400b, avoid equipment aging caused by the long-term independent operation of the charging device 400a, thereby improving the overall operating efficiency of the charging system 300 and extending the working life of each charging device 400 in the charging system 300.

[0230] Figure 17 This is a schematic diagram of another charging system 300 provided in the embodiments of this application.

[0231] See Figure 17 ,and Figure 16 The difference in the illustrated embodiment is that, in the multiple charging devices 400 of the charging system 300, the connection ports 4213 of two adjacent power distribution units 421 are connected through a power sharing bus 310.

[0232] For example, such as Figure 17 As shown, continue with Figure 16Taking the charging system 300 shown as an example, which includes charging devices 400a and 400b, the charging system 300 also includes four power-sharing buses 310, namely power-sharing buses 310a, 310b, 310c, and 310d. Connection ports 4213#1 and 4213#8 are connected via power-sharing bus 310a, connection ports 4213#2 and 4213#3 are connected via power-sharing bus 310b, connection ports 4213#4 and 4213#5 are connected via power-sharing bus 310c, and connection ports 4213#6 and 4213#7 are connected via power-sharing bus 310d. Thus, four power-sharing transmission lines are formed in the charging system 300 through power-sharing buses 310a, 310b, 310c, and 310d. Either power distribution unit 421 in charging device 400a and charging device 400b can obtain the power output by the adjacent power distribution unit 421 through the connected power sharing bus 310.

[0233] It is understandable that, in specific implementation, when the two connection ports 4213 of each power distribution unit 421 included in the charging device 400a and the charging device 400b are connected through a switch matrix 4212, power transmission can also be performed between the power sharing bus 310 connected to the two connection ports 4213 of the same power distribution unit 421, thereby enabling any power distribution unit 421 in the charging device 400a and the charging device 400b to obtain the power output by all the remaining power distribution units 421 in the charging device 400a and the charging device 400b through the connected power sharing bus 310.

[0234] For example, taking the power distribution unit 421#1's connection port 4213#2 as an example, which obtains the power output of power distribution units 421#2 to 421#4 through the connected power sharing bus 310b, when the switch matrix 4212 in power distribution unit 421#2 connects the connection between connection ports 4213#3 and 4213#4, and the switch matrix 4212 in power distribution unit 421#3 connects the connection between connection ports 4213#5 and 4213#6, the power output of power distribution units 421#3 and 421#4 collected by the power sharing bus 420d can be transmitted through connection port 4213#6 to connection port 4213#5, and then through connection port 4213#5 to the power sharing bus 420c. Furthermore, the power sharing bus 420c can transmit the power output from the collected power distribution units 421#2 to 421#4 to the connection port 4213#3 via the connection port 4213#4, and then transmit it to the connection port 4213#2 of the power distribution unit 421#1 via the connection port 4213#3 and the power sharing bus 420b. Thus, the connection port 4213#2 can transmit the power output from the collected power distribution units 421#2 to 421#4 to the load port 4214 connected to the electric vehicle, thereby increasing the output power of the load port 4214 and meeting the charging power requirements of the electric vehicle.

[0235] In the charging system 300 provided in this application embodiment, by connecting the connection ports 4213 of two adjacent power distribution units 421 in multiple charging devices 400 through a power sharing bus 310, more power sharing transmission lines can be formed in the charging system 300, thereby improving the flexibility of power transmission between the power distribution units 421 of different charging devices 400 in the charging system 300, so that the power distribution units 420 included in each charging device 400 in the charging system 300 can better meet the charging power requirements of different loads.

[0236] Figure 18 and Figure 19 These are schematic diagrams of another example of a charging system 300 provided in the embodiments of this application.

[0237] Combination Figure 18 and Figure 19 ,and Figure 16 and Figure 17The illustrated embodiment differs in that, in addition to including multiple charging devices 400 and a power sharing bus 310, the charging system 300 also includes an energy storage device 500 and / or a photovoltaic device 600. Specifically, a connection port 4213 of each energy storage device 500 and / or photovoltaic device 600, as well as each power distribution unit 421 in each charging device 400, is connected to the power sharing bus 310. The power sharing bus 310 can be used to collect the power output from the energy storage device 500 and / or photovoltaic device 600, and each power distribution unit 421 in each charging device 400 within the charging system 300.

[0238] In specific implementations, in some embodiments, such as Figure 18 As shown, the energy storage device 500 includes a power distribution device 530, and the photovoltaic device 600 includes a power distribution device 630. Each power distribution unit 531 in the power distribution device 530, each power distribution unit 631 in the power distribution device 630, and each power distribution unit 4213 in the charging device 400 are all connected to the power sharing bus 310. Therefore, any power distribution unit of any device in the charging system 300 can obtain the power output from the connection ports of all remaining power distribution units in the charging system 300 through the power sharing bus 310.

[0239] For example, such as Figure 18 As shown, continue with Figure 16 The charging system 300 shown includes charging devices 400a and 400b, power sharing bus 310a and power sharing bus 310b. Taking this as an example, the charging system 300 also includes energy storage device 500 and photovoltaic device 600. The power distribution device 530 of the energy storage device 500 includes a power distribution unit 531#1, which includes connection ports 5313#1 and 5313#2. The power distribution device 630 of the photovoltaic device 600 includes a power distribution unit 631#1, which includes connection ports 6313#1 and 6313#2.

[0240] Specifically, connection ports 4213#1, 4213#3, 4213#5, 4213#7, 5313#1, and 6313#1 are connected to the power sharing bus 310a, while connection ports 4213#2, 4213#4, 4213#6, 4213#8, 5313#2, and 6313#2 are connected to the power sharing bus 310b. Thus, two power sharing transmission lines are formed in the charging system 300 via the power sharing buses 310a and 310b.

[0241] In one possible application scenario, when a load port 5314 of the power distribution unit 531#1 in the energy storage device 500 is connected to an electric vehicle, if the current output power of the load port 5314 is less than the charging power required by the electric vehicle, the connection port 5313#1 of the power distribution unit 531#1 can obtain the power output from the power distribution units 421#1 to 421#4 and the power distribution unit 631#1 through the power sharing bus 310a, and transmit the obtained power to the load port 5314, thereby helping to meet the charging power required by the electric vehicle.

[0242] In the charging system 300 provided in this application embodiment, the energy storage device 500 and the photovoltaic device 600 can charge electric vehicles independently through their respective power distribution devices. This facilitates the charging system 300 to charge more electric vehicles simultaneously, improving the overall charging efficiency of the charging system 300. Furthermore, the energy storage device 500 and the photovoltaic device 600 can also transfer power with the power distribution unit 421 of the charging device 400 through their respective power distribution devices. Therefore, in practical applications, when the grid price is low, the power distribution unit 421 of the charging device 400 can transfer the electricity received from the grid to the energy storage device 500, allowing the energy storage device 500 to store as much electricity as possible. When the grid price is high, charging electric vehicles is prioritized through the energy storage device 500 to reduce the amount of electricity received from the grid when using the charging device 400 to charge electric vehicles, thereby reducing the cost of charging electric vehicles.

[0243] In other embodiments, such as Figure 19 As shown, with Figure 18 The difference in the illustrated embodiment is that the energy storage device 500 may not include the power distribution device 530, but instead is directly connected to the power sharing bus 310 through the output terminal of the DC-DC converter 520 in the energy storage device 500. Similarly, the photovoltaic device 600 may also not include the power distribution device 630, but instead is directly connected to the power sharing bus 310 through the output terminal of the DC-DC converter 630 in the photovoltaic device 600. Thus, the energy storage device 500 and the photovoltaic device 600 transmit power to the power distribution unit 421 of the charging device 400 through the power sharing bus, thereby flexibly adjusting the output power of the load port 4214 of the power distribution unit 421 to meet the charging power requirements of different electric vehicles.

[0244] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power distribution apparatus, characterized by, The application is applied to a charging device, and the charging device comprises a power module; The power distribution device comprises a plurality of power distribution units, each of the power distribution units comprising at least one power supply port, a plurality of load ports, a plurality of connection ports and a switch matrix, the power supply port being used for connecting the power module, the load port being used for connecting a load, and any two of the power supply port, the load port and the connection port being connected through the switch matrix; The switch matrix is used for disconnecting or conducting the connection between any two of the power supply port, the load port and the connection port; wherein The plurality of power distribution units comprises a first power distribution unit and a second power distribution unit, one of the connection ports of the first power distribution unit being used for connecting a power distribution unit of another charging device, so that power transmission is performed between the first power distribution unit and the power distribution unit of the other charging device, another of the connection ports of the first power distribution unit being connected with one of the connection ports of the second power distribution unit, so that power transmission is performed between the first power distribution unit and the second power distribution unit, and the one of the connection ports of the first power distribution unit is further connected with the other of the connection ports of the first power distribution unit through the switch matrix; The switch matrix is further used for disconnecting or conducting the connection between the one of the connection ports of the first power distribution unit and the other of the connection ports of the first power distribution unit.

2. The power distribution apparatus of claim 1, wherein, The power module comprises an alternating current-direct current (AC-DC) conversion device, a direct current-direct current (DC-DC) conversion device and a direct current bus; The AC-DC conversion device is connected with an input end of the DC-DC conversion device through the direct current bus; The AC-DC conversion device is used for converting alternating current into first direct current and outputting the first direct current to the direct current bus; The DC-DC conversion device is used for receiving the first direct current through the direct current bus, converting the first direct current into second direct current and outputting the second direct current; The power supply port is used for connecting an output end of the DC-DC conversion device to receive the second direct current output by the DC-DC conversion device.

3. The power distribution apparatus of claim 1 or 2, wherein, The power distribution device further comprises a power sharing bus; One of the connection ports of the first power distribution unit is used for connecting the power distribution unit of the other charging device through the power sharing bus; The power sharing bus is used for connecting at least one of a photovoltaic device and an energy storage device to collect power output by the at least one of the energy storage device and the photovoltaic device, the first power distribution unit and the power distribution unit of the other charging device.

4. The power distribution apparatus of claim 1 or 2, wherein The switch matrix of the power distribution unit comprises a first switch unit and a second switch unit; The power supply port is connected with the connection port through the first switch unit and the second switch unit, the power supply port is connected with the load port through the first switch unit, and the connection port is connected with the load port through the second switch unit.

5. The power distribution apparatus of claim 4, wherein, The switch matrix of the power distribution unit further comprises a third switch unit; Two power supply ports in the plurality of power supply ports of the power distribution unit are connected through the third switch unit, and / or two connection ports in the plurality of connection ports of the power distribution unit are connected through the third switch unit.

6. A charging device, characterized by Comprise: A power module and a power distribution device; The power distribution device comprises a plurality of power distribution units, each power distribution unit comprising at least one power supply port, a plurality of load ports, a plurality of connection ports, and a switch matrix, the power supply port being connected to the power module, the load port being used to connect a load, any two of the power supply port, the load port and the connection port being connected through the switch matrix; The switch matrix is used to disconnect or conduct the connection between any two of the power supply port, the load port and the connection port; wherein, The plurality of power distribution units comprises a first power distribution unit and a second power distribution unit, one of the connection ports of the first power distribution unit is used to connect the power distribution unit of the other charging device, so that power transmission is performed between the first power distribution unit and the power distribution unit of the other charging device, another of the connection ports of the first power distribution unit is connected to one of the connection ports of the second power distribution unit, so that power transmission is performed between the first power distribution unit and the second power distribution unit, and the one of the connection ports of the first power distribution unit is also connected to the another of the connection ports of the first power distribution unit through the switch matrix; The switch matrix is also used to disconnect or conduct the connection between the one of the connection ports of the first power distribution unit and the another of the connection ports of the first power distribution unit.

7. The charging apparatus according to claim 6, characterized by, The power module comprises an alternating current-direct current (AC-DC) conversion device, a direct current-direct current (DC-DC) conversion device, and a direct current bus; The AC-DC conversion device is connected to the input end of the DC-DC conversion device through the direct current bus, and the output end of the DC-DC conversion device is connected to the power supply port; The AC-DC conversion device is used to convert alternating current into first direct current and output the first direct current to the direct current bus; The DC-DC conversion device is used to receive the first direct current through the direct current bus, convert the first direct current into second direct current, and output the second direct current to the power supply port.

8. An energy storage device, characterized by, Comprise: A battery pack, a direct current-direct current (DC-DC) conversion device, and a power distribution device; The power distribution device comprises a plurality of power distribution units, each power distribution unit comprising at least one power supply port, a plurality of load ports, a plurality of connection ports, and a switch matrix; The battery pack is connected to the power supply port through the DC-DC conversion device, the load port is used to connect a load, and any two of the power supply port, the load port and the connection port are connected through the switch matrix; The DC-DC conversion device is used for outputting the direct current output by the battery pack after power conversion to the power port, or the DC-DC conversion device is used for outputting the direct current output by the power port after power conversion to the battery pack. The switch matrix is used for disconnecting or conducting the connection between any two of the power port, the load port and the connection port. The plurality of power distribution units includes a first power distribution unit and a second power distribution unit, one connection port of the first power distribution unit is used for connecting the power distribution unit of the charging device, so that power transmission is performed between the first power distribution unit and the power distribution unit of the charging device, another connection port of the first power distribution unit is connected with one connection port of the second power distribution unit, so that power transmission is performed between the first power distribution unit and the second power distribution unit, and the one connection port of the first power distribution unit is also connected with the another connection port of the first power distribution unit through the switch matrix. The switch matrix is also used for disconnecting or conducting the connection between the one connection port of the first power distribution unit and the another connection port of the first power distribution unit.

9. A charging system, characterized by Comprise: A plurality of charging devices; The charging device includes a power module and a power distribution device, the power distribution device includes a plurality of power distribution units, the power distribution unit includes at least one power port, a plurality of load ports, a plurality of connection ports and a switch matrix; The power port is connected with the power module, the load port is used for connecting a load, and any two of the power port, the load port and the connection port are connected through the switch matrix; The switch matrix is used for disconnecting or conducting the connection between any two of the power port, the load port and the connection port; wherein, The plurality of power distribution units of each charging device includes a first power distribution unit and a second power distribution unit, one connection port of the first power distribution unit of one charging device is connected with one connection port of the first power distribution unit of another charging device, so that power transmission is performed between the first power distribution unit of the one charging device and the first power distribution unit of the another charging device, another connection port of the first power distribution unit of the one charging device is connected with one connection port of the second power distribution unit of the one charging device, so that power transmission is performed between the first power distribution unit of the one charging device and the second power distribution unit of the one charging device, and the one connection port of the first power distribution unit of the one charging device is also connected with the another connection port of the first power distribution unit of the one charging device through the switch matrix. The switch matrix is also used to disconnect or conduct the connection between the one connection port of the first power distribution unit of the one charging device and the another connection port of the first power distribution unit of the one charging device.

10. The charging system of claim 9, wherein, The power module comprises an alternating current-direct current (AC-DC) conversion device, a direct current-direct current (DC-DC) conversion device and a direct current bus; The AC-DC conversion device is connected with the input end of the DC-DC conversion device through the direct current bus, and the output end of the DC-DC conversion device is connected with the power port; The AC-DC conversion device is used to convert alternating current into first direct current and then output to the direct current bus; The DC-DC conversion device is used to receive the first direct current through the direct current bus, convert the first direct current into second direct current and then output to the power port.

11. The charging system according to claim 9 or 10, characterized in that, The charging system further comprises at least one of an energy storage device and a photovoltaic device, and a power sharing bus; At least one of the energy storage device and the photovoltaic device and one connection port of each power distribution unit of each charging device are connected with the power sharing bus; The power sharing bus is used to collect the power output by at least one of the energy storage device and the photovoltaic device and each power distribution unit of each charging device.

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